/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 --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --rcfgbuilder.size.of.a.code.block SequenceOfStatements --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=BIGGEST --traceabstraction.additional.smt.options log-additional-information=true --traceabstraction.additional.smt.options unknown-allowed=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_lcr-var-start-time.4.1.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-adbd35c [2020-10-12 19:59:15,050 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-12 19:59:15,053 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-12 19:59:15,096 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-12 19:59:15,097 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-12 19:59:15,104 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-12 19:59:15,106 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-12 19:59:15,109 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-12 19:59:15,111 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-12 19:59:15,115 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-12 19:59:15,116 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-12 19:59:15,116 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-12 19:59:15,117 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-12 19:59:15,119 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-12 19:59:15,122 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-12 19:59:15,124 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-12 19:59:15,126 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-12 19:59:15,128 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-12 19:59:15,129 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-12 19:59:15,136 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-12 19:59:15,138 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-12 19:59:15,139 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-12 19:59:15,140 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-12 19:59:15,140 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-12 19:59:15,152 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-12 19:59:15,153 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-12 19:59:15,153 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-12 19:59:15,154 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-12 19:59:15,155 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-12 19:59:15,156 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-12 19:59:15,156 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-12 19:59:15,157 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-12 19:59:15,158 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-12 19:59:15,159 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-12 19:59:15,160 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-12 19:59:15,160 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-12 19:59:15,161 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-12 19:59:15,161 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-12 19:59:15,161 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-12 19:59:15,162 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-12 19:59:15,164 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-12 19:59:15,164 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-12 19:59:15,206 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-12 19:59:15,207 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-12 19:59:15,208 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-12 19:59:15,209 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-12 19:59:15,209 INFO L138 SettingsManager]: * Use SBE=true [2020-10-12 19:59:15,209 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-12 19:59:15,209 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-12 19:59:15,210 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-12 19:59:15,210 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-12 19:59:15,210 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-12 19:59:15,211 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-12 19:59:15,211 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-12 19:59:15,211 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-12 19:59:15,212 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-12 19:59:15,212 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-12 19:59:15,213 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-12 19:59:15,213 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-12 19:59:15,213 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-12 19:59:15,213 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-12 19:59:15,213 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-12 19:59:15,214 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-12 19:59:15,214 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-12 19:59:15,214 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-12 19:59:15,214 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-12 19:59:15,214 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-12 19:59:15,215 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-12 19:59:15,215 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-12 19:59:15,215 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-12 19:59:15,215 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-12 19:59:15,215 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=BIGGEST;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=BIGGEST;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=BIGGEST;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=BIGGEST;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=BIGGEST;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=BIGGEST;log-additional-information=true;unknown-allowed=true; [2020-10-12 19:59:15,549 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-12 19:59:15,561 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-12 19:59:15,565 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-12 19:59:15,566 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-12 19:59:15,567 INFO L275 PluginConnector]: CDTParser initialized [2020-10-12 19:59:15,567 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_lcr-var-start-time.4.1.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c [2020-10-12 19:59:15,627 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/e3167636d/98af5aaf25a4408fa7f8102220161d6b/FLAGb23f04a1d [2020-10-12 19:59:16,100 INFO L306 CDTParser]: Found 1 translation units. [2020-10-12 19:59:16,103 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/seq-mthreaded-reduced/pals_lcr-var-start-time.4.1.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c [2020-10-12 19:59:16,118 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/e3167636d/98af5aaf25a4408fa7f8102220161d6b/FLAGb23f04a1d [2020-10-12 19:59:16,417 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/e3167636d/98af5aaf25a4408fa7f8102220161d6b [2020-10-12 19:59:16,425 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-12 19:59:16,427 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-12 19:59:16,428 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-12 19:59:16,428 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-12 19:59:16,431 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-12 19:59:16,432 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.10 07:59:16" (1/1) ... [2020-10-12 19:59:16,435 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@35246ee9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 07:59:16, skipping insertion in model container [2020-10-12 19:59:16,435 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.10 07:59:16" (1/1) ... [2020-10-12 19:59:16,442 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-12 19:59:16,484 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-12 19:59:16,731 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-12 19:59:16,744 INFO L203 MainTranslator]: Completed pre-run [2020-10-12 19:59:16,890 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-12 19:59:16,912 INFO L208 MainTranslator]: Completed translation [2020-10-12 19:59:16,913 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 07:59:16 WrapperNode [2020-10-12 19:59:16,913 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-12 19:59:16,914 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-12 19:59:16,914 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-12 19:59:16,914 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-12 19:59:16,928 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 07:59:16" (1/1) ... [2020-10-12 19:59:16,928 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 07:59:16" (1/1) ... [2020-10-12 19:59:16,941 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 07:59:16" (1/1) ... [2020-10-12 19:59:16,941 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 07:59:16" (1/1) ... [2020-10-12 19:59:16,954 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 07:59:16" (1/1) ... [2020-10-12 19:59:16,963 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 07:59:16" (1/1) ... [2020-10-12 19:59:16,966 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 07:59:16" (1/1) ... [2020-10-12 19:59:16,970 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-12 19:59:16,971 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-12 19:59:16,971 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-12 19:59:16,971 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-12 19:59:16,972 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 07:59:16" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/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 [2020-10-12 19:59:17,039 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-12 19:59:17,040 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-12 19:59:17,040 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-10-12 19:59:17,040 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-12 19:59:17,040 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-10-12 19:59:17,040 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-10-12 19:59:17,040 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-10-12 19:59:17,041 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uchar [2020-10-12 19:59:17,041 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2020-10-12 19:59:17,041 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-12 19:59:17,041 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-10-12 19:59:17,041 INFO L130 BoogieDeclarations]: Found specification of procedure read [2020-10-12 19:59:17,042 INFO L130 BoogieDeclarations]: Found specification of procedure write [2020-10-12 19:59:17,042 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2020-10-12 19:59:17,042 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2020-10-12 19:59:17,042 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2020-10-12 19:59:17,042 INFO L130 BoogieDeclarations]: Found specification of procedure node4 [2020-10-12 19:59:17,042 INFO L130 BoogieDeclarations]: Found specification of procedure init [2020-10-12 19:59:17,043 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-10-12 19:59:17,043 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-12 19:59:17,043 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-12 19:59:17,043 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-12 19:59:17,675 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-12 19:59:17,675 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-10-12 19:59:17,681 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.10 07:59:17 BoogieIcfgContainer [2020-10-12 19:59:17,681 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-12 19:59:17,685 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-12 19:59:17,685 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-12 19:59:17,689 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-12 19:59:17,689 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.10 07:59:16" (1/3) ... [2020-10-12 19:59:17,690 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3d885234 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.10 07:59:17, skipping insertion in model container [2020-10-12 19:59:17,690 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 07:59:16" (2/3) ... [2020-10-12 19:59:17,691 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3d885234 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.10 07:59:17, skipping insertion in model container [2020-10-12 19:59:17,691 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.10 07:59:17" (3/3) ... [2020-10-12 19:59:17,694 INFO L109 eAbstractionObserver]: Analyzing ICFG pals_lcr-var-start-time.4.1.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c [2020-10-12 19:59:17,705 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-12 19:59:17,721 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-12 19:59:17,736 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-12 19:59:17,770 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-10-12 19:59:17,770 INFO L376 AbstractCegarLoop]: Hoare is true [2020-10-12 19:59:17,771 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-12 19:59:17,771 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-12 19:59:17,771 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-12 19:59:17,771 INFO L380 AbstractCegarLoop]: Difference is false [2020-10-12 19:59:17,772 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-12 19:59:17,772 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-12 19:59:17,794 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states. [2020-10-12 19:59:17,802 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-10-12 19:59:17,803 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 19:59:17,804 INFO L422 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] [2020-10-12 19:59:17,804 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 19:59:17,809 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 19:59:17,809 INFO L82 PathProgramCache]: Analyzing trace with hash 755670559, now seen corresponding path program 1 times [2020-10-12 19:59:17,817 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 19:59:17,818 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [79745014] [2020-10-12 19:59:17,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 19:59:18,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:59:18,208 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:59:18,342 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:59:18,554 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:59:18,830 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:59:19,953 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:59:19,954 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 59 [2020-10-12 19:59:19,954 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-12 19:59:19,954 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1873 [2020-10-12 19:59:19,957 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:59:19,958 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-12 19:59:19,958 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-12 19:59:19,959 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 41 [2020-10-12 19:59:19,959 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-10-12 19:59:20,275 WARN L193 SmtUtils]: Spent 153.00 ms on a formula simplification that was a NOOP. DAG size: 118 [2020-10-12 19:59:20,279 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 19:59:20,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:59:20,292 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:59:20,300 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:59:20,300 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 19:59:20,300 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 19:59:20,301 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-12 19:59:20,302 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:59:20,302 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 19:59:20,302 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 19:59:20,302 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 19:59:20,303 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:59:20,329 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 19:59:20,330 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [79745014] [2020-10-12 19:59:20,332 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 19:59:20,332 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-12 19:59:20,333 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [141560628] [2020-10-12 19:59:20,340 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-12 19:59:20,340 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 19:59:20,355 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-12 19:59:20,357 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-10-12 19:59:20,360 INFO L87 Difference]: Start difference. First operand 117 states. Second operand 7 states. [2020-10-12 19:59:20,611 WARN L193 SmtUtils]: Spent 144.00 ms on a formula simplification that was a NOOP. DAG size: 126 [2020-10-12 19:59:21,279 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 19:59:21,280 INFO L93 Difference]: Finished difference Result 547 states and 860 transitions. [2020-10-12 19:59:21,280 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-12 19:59:21,282 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 53 [2020-10-12 19:59:21,283 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 19:59:21,301 INFO L225 Difference]: With dead ends: 547 [2020-10-12 19:59:21,301 INFO L226 Difference]: Without dead ends: 441 [2020-10-12 19:59:21,306 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2020-10-12 19:59:21,328 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 441 states. [2020-10-12 19:59:21,381 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 441 to 193. [2020-10-12 19:59:21,382 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 193 states. [2020-10-12 19:59:21,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 193 states to 193 states and 288 transitions. [2020-10-12 19:59:21,386 INFO L78 Accepts]: Start accepts. Automaton has 193 states and 288 transitions. Word has length 53 [2020-10-12 19:59:21,387 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 19:59:21,387 INFO L479 AbstractCegarLoop]: Abstraction has 193 states and 288 transitions. [2020-10-12 19:59:21,387 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-12 19:59:21,387 INFO L276 IsEmpty]: Start isEmpty. Operand 193 states and 288 transitions. [2020-10-12 19:59:21,390 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-10-12 19:59:21,390 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 19:59:21,391 INFO L422 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] [2020-10-12 19:59:21,391 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-12 19:59:21,391 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 19:59:21,392 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 19:59:21,392 INFO L82 PathProgramCache]: Analyzing trace with hash 1932418099, now seen corresponding path program 1 times [2020-10-12 19:59:21,392 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 19:59:21,393 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [358867195] [2020-10-12 19:59:21,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 19:59:21,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:59:21,465 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:59:21,504 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:59:21,583 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:59:21,867 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:59:22,474 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:59:22,478 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 60 [2020-10-12 19:59:22,478 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-12 19:59:22,478 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1037 [2020-10-12 19:59:22,479 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:59:22,479 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-12 19:59:22,479 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 56 [2020-10-12 19:59:22,480 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 3 [2020-10-12 19:59:22,480 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 19:59:22,810 WARN L193 SmtUtils]: Spent 214.00 ms on a formula simplification that was a NOOP. DAG size: 118 [2020-10-12 19:59:22,812 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 19:59:22,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:59:22,821 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:59:22,832 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:59:22,832 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 19:59:22,833 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 19:59:22,833 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 13 [2020-10-12 19:59:22,842 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:59:22,843 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 19:59:22,843 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 19:59:22,844 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 19:59:22,844 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-12 19:59:22,863 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 19:59:22,864 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [358867195] [2020-10-12 19:59:22,864 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 19:59:22,865 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-12 19:59:22,865 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [93699569] [2020-10-12 19:59:22,868 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-12 19:59:22,868 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 19:59:22,868 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-12 19:59:22,869 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-12 19:59:22,869 INFO L87 Difference]: Start difference. First operand 193 states and 288 transitions. Second operand 5 states. [2020-10-12 19:59:23,639 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 19:59:23,640 INFO L93 Difference]: Finished difference Result 359 states and 549 transitions. [2020-10-12 19:59:23,641 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-12 19:59:23,641 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 54 [2020-10-12 19:59:23,642 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 19:59:23,645 INFO L225 Difference]: With dead ends: 359 [2020-10-12 19:59:23,645 INFO L226 Difference]: Without dead ends: 357 [2020-10-12 19:59:23,646 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-12 19:59:23,647 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 357 states. [2020-10-12 19:59:23,666 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 357 to 197. [2020-10-12 19:59:23,667 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 197 states. [2020-10-12 19:59:23,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 197 states to 197 states and 292 transitions. [2020-10-12 19:59:23,668 INFO L78 Accepts]: Start accepts. Automaton has 197 states and 292 transitions. Word has length 54 [2020-10-12 19:59:23,669 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 19:59:23,669 INFO L479 AbstractCegarLoop]: Abstraction has 197 states and 292 transitions. [2020-10-12 19:59:23,669 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-12 19:59:23,669 INFO L276 IsEmpty]: Start isEmpty. Operand 197 states and 292 transitions. [2020-10-12 19:59:23,672 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-10-12 19:59:23,673 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 19:59:23,673 INFO L422 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] [2020-10-12 19:59:23,673 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-12 19:59:23,673 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 19:59:23,674 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 19:59:23,674 INFO L82 PathProgramCache]: Analyzing trace with hash -214961330, now seen corresponding path program 1 times [2020-10-12 19:59:23,674 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 19:59:23,674 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1162002892] [2020-10-12 19:59:23,675 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 19:59:23,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:59:23,734 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:59:23,770 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:59:23,859 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:59:24,106 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:59:24,442 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:59:24,442 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 61 [2020-10-12 19:59:24,442 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-12 19:59:24,442 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 732 [2020-10-12 19:59:24,443 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:59:24,443 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 19:59:24,443 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-12 19:59:24,443 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 45 [2020-10-12 19:59:24,443 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:59:24,589 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 19:59:24,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:59:24,597 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:59:24,603 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:59:24,604 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 19:59:24,604 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 19:59:24,604 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-12 19:59:24,605 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:59:24,605 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 19:59:24,605 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 19:59:24,605 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 19:59:24,605 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:59:24,620 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 19:59:24,621 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1162002892] [2020-10-12 19:59:24,621 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 19:59:24,621 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-12 19:59:24,621 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [730026359] [2020-10-12 19:59:24,622 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-12 19:59:24,622 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 19:59:24,622 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-12 19:59:24,623 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-12 19:59:24,623 INFO L87 Difference]: Start difference. First operand 197 states and 292 transitions. Second operand 4 states. [2020-10-12 19:59:24,755 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification that was a NOOP. DAG size: 122 [2020-10-12 19:59:25,136 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 19:59:25,136 INFO L93 Difference]: Finished difference Result 515 states and 790 transitions. [2020-10-12 19:59:25,137 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-12 19:59:25,137 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 55 [2020-10-12 19:59:25,137 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 19:59:25,139 INFO L225 Difference]: With dead ends: 515 [2020-10-12 19:59:25,140 INFO L226 Difference]: Without dead ends: 349 [2020-10-12 19:59:25,141 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-12 19:59:25,142 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 349 states. [2020-10-12 19:59:25,163 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 349 to 345. [2020-10-12 19:59:25,164 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 345 states. [2020-10-12 19:59:25,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 345 states to 345 states and 522 transitions. [2020-10-12 19:59:25,166 INFO L78 Accepts]: Start accepts. Automaton has 345 states and 522 transitions. Word has length 55 [2020-10-12 19:59:25,166 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 19:59:25,166 INFO L479 AbstractCegarLoop]: Abstraction has 345 states and 522 transitions. [2020-10-12 19:59:25,166 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-12 19:59:25,166 INFO L276 IsEmpty]: Start isEmpty. Operand 345 states and 522 transitions. [2020-10-12 19:59:25,169 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-10-12 19:59:25,169 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 19:59:25,169 INFO L422 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] [2020-10-12 19:59:25,170 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-12 19:59:25,170 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 19:59:25,170 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 19:59:25,170 INFO L82 PathProgramCache]: Analyzing trace with hash 1516777453, now seen corresponding path program 1 times [2020-10-12 19:59:25,170 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 19:59:25,171 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1937913303] [2020-10-12 19:59:25,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 19:59:25,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:59:25,217 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:59:25,242 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:59:25,267 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:59:25,369 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:59:25,673 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:59:26,584 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:59:26,584 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 62 [2020-10-12 19:59:26,584 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-12 19:59:26,585 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1384 [2020-10-12 19:59:26,585 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:59:26,585 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-12 19:59:26,585 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-12 19:59:26,586 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 46 [2020-10-12 19:59:26,586 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 19:59:26,747 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 19:59:26,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:59:26,753 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:59:26,760 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:59:26,760 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 19:59:26,760 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 19:59:26,761 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-12 19:59:26,761 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:59:26,761 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 19:59:26,761 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 19:59:26,762 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 19:59:26,762 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 19:59:26,779 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 19:59:26,780 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1937913303] [2020-10-12 19:59:26,780 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 19:59:26,780 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-12 19:59:26,780 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [820977520] [2020-10-12 19:59:26,781 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-12 19:59:26,781 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 19:59:26,781 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-12 19:59:26,782 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-12 19:59:26,782 INFO L87 Difference]: Start difference. First operand 345 states and 522 transitions. Second operand 5 states. [2020-10-12 19:59:26,955 WARN L193 SmtUtils]: Spent 139.00 ms on a formula simplification that was a NOOP. DAG size: 127 [2020-10-12 19:59:27,846 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 19:59:27,846 INFO L93 Difference]: Finished difference Result 677 states and 1041 transitions. [2020-10-12 19:59:27,847 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-12 19:59:27,847 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 56 [2020-10-12 19:59:27,847 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 19:59:27,850 INFO L225 Difference]: With dead ends: 677 [2020-10-12 19:59:27,850 INFO L226 Difference]: Without dead ends: 511 [2020-10-12 19:59:27,851 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-10-12 19:59:27,853 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 511 states. [2020-10-12 19:59:27,877 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 511 to 505. [2020-10-12 19:59:27,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 505 states. [2020-10-12 19:59:27,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 505 states to 505 states and 772 transitions. [2020-10-12 19:59:27,880 INFO L78 Accepts]: Start accepts. Automaton has 505 states and 772 transitions. Word has length 56 [2020-10-12 19:59:27,880 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 19:59:27,881 INFO L479 AbstractCegarLoop]: Abstraction has 505 states and 772 transitions. [2020-10-12 19:59:27,881 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-12 19:59:27,881 INFO L276 IsEmpty]: Start isEmpty. Operand 505 states and 772 transitions. [2020-10-12 19:59:27,883 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-10-12 19:59:27,883 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 19:59:27,883 INFO L422 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] [2020-10-12 19:59:27,883 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-12 19:59:27,883 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 19:59:27,884 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 19:59:27,884 INFO L82 PathProgramCache]: Analyzing trace with hash 899516515, now seen corresponding path program 1 times [2020-10-12 19:59:27,884 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 19:59:27,884 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [186712756] [2020-10-12 19:59:27,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 19:59:27,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:59:27,922 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:59:27,954 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:59:27,979 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:59:28,017 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:59:28,358 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:59:28,912 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:59:31,016 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:59:31,016 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 62 [2020-10-12 19:59:31,017 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-12 19:59:31,017 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3108 [2020-10-12 19:59:31,017 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:59:31,017 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-12 19:59:31,017 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-12 19:59:31,018 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 44 [2020-10-12 19:59:31,018 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:59:31,179 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 19:59:31,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:59:31,186 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:59:31,192 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:59:31,193 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 19:59:31,193 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 19:59:31,193 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-12 19:59:31,194 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:59:31,194 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 19:59:31,194 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 19:59:31,195 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 19:59:31,195 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 19:59:31,211 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 19:59:31,212 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [186712756] [2020-10-12 19:59:31,212 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 19:59:31,212 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-12 19:59:31,213 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1294597140] [2020-10-12 19:59:31,214 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-12 19:59:31,214 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 19:59:31,215 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-12 19:59:31,215 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-10-12 19:59:31,215 INFO L87 Difference]: Start difference. First operand 505 states and 772 transitions. Second operand 7 states. [2020-10-12 19:59:31,470 WARN L193 SmtUtils]: Spent 210.00 ms on a formula simplification that was a NOOP. DAG size: 127 [2020-10-12 19:59:32,416 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 19:59:32,417 INFO L93 Difference]: Finished difference Result 2115 states and 3306 transitions. [2020-10-12 19:59:32,417 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-12 19:59:32,417 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 56 [2020-10-12 19:59:32,418 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 19:59:32,429 INFO L225 Difference]: With dead ends: 2115 [2020-10-12 19:59:32,429 INFO L226 Difference]: Without dead ends: 1875 [2020-10-12 19:59:32,431 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2020-10-12 19:59:32,434 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1875 states. [2020-10-12 19:59:32,509 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1875 to 963. [2020-10-12 19:59:32,510 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 963 states. [2020-10-12 19:59:32,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 963 states to 963 states and 1492 transitions. [2020-10-12 19:59:32,515 INFO L78 Accepts]: Start accepts. Automaton has 963 states and 1492 transitions. Word has length 56 [2020-10-12 19:59:32,515 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 19:59:32,515 INFO L479 AbstractCegarLoop]: Abstraction has 963 states and 1492 transitions. [2020-10-12 19:59:32,515 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-12 19:59:32,515 INFO L276 IsEmpty]: Start isEmpty. Operand 963 states and 1492 transitions. [2020-10-12 19:59:32,516 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-10-12 19:59:32,517 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 19:59:32,517 INFO L422 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] [2020-10-12 19:59:32,517 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-12 19:59:32,518 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 19:59:32,518 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 19:59:32,518 INFO L82 PathProgramCache]: Analyzing trace with hash -578934334, now seen corresponding path program 1 times [2020-10-12 19:59:32,518 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 19:59:32,518 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1575033286] [2020-10-12 19:59:32,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 19:59:32,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:59:32,552 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:59:32,572 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:59:32,602 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:59:32,662 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:59:32,724 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:59:33,116 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:59:34,870 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:59:34,870 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 62 [2020-10-12 19:59:34,870 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-12 19:59:34,871 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2331 [2020-10-12 19:59:34,871 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:59:34,871 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-12 19:59:34,871 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-12 19:59:34,871 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 47 [2020-10-12 19:59:34,872 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:59:35,049 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 19:59:35,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:59:35,060 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:59:35,078 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:59:35,079 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 19:59:35,079 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 19:59:35,079 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 20 [2020-10-12 19:59:35,080 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:59:35,080 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 19:59:35,080 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 19:59:35,080 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-12 19:59:35,081 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:59:35,098 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 19:59:35,099 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1575033286] [2020-10-12 19:59:35,100 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 19:59:35,100 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-12 19:59:35,100 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [853820220] [2020-10-12 19:59:35,100 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-12 19:59:35,101 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 19:59:35,101 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-12 19:59:35,101 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-10-12 19:59:35,101 INFO L87 Difference]: Start difference. First operand 963 states and 1492 transitions. Second operand 7 states. [2020-10-12 19:59:35,270 WARN L193 SmtUtils]: Spent 142.00 ms on a formula simplification that was a NOOP. DAG size: 123 [2020-10-12 19:59:36,183 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 19:59:36,183 INFO L93 Difference]: Finished difference Result 3010 states and 4681 transitions. [2020-10-12 19:59:36,184 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-12 19:59:36,184 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 56 [2020-10-12 19:59:36,184 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 19:59:36,197 INFO L225 Difference]: With dead ends: 3010 [2020-10-12 19:59:36,197 INFO L226 Difference]: Without dead ends: 2078 [2020-10-12 19:59:36,201 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2020-10-12 19:59:36,205 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2078 states. [2020-10-12 19:59:36,322 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2078 to 1055. [2020-10-12 19:59:36,322 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1055 states. [2020-10-12 19:59:36,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1055 states to 1055 states and 1633 transitions. [2020-10-12 19:59:36,328 INFO L78 Accepts]: Start accepts. Automaton has 1055 states and 1633 transitions. Word has length 56 [2020-10-12 19:59:36,329 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 19:59:36,330 INFO L479 AbstractCegarLoop]: Abstraction has 1055 states and 1633 transitions. [2020-10-12 19:59:36,330 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-12 19:59:36,330 INFO L276 IsEmpty]: Start isEmpty. Operand 1055 states and 1633 transitions. [2020-10-12 19:59:36,331 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-10-12 19:59:36,331 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 19:59:36,332 INFO L422 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] [2020-10-12 19:59:36,332 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-12 19:59:36,332 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 19:59:36,333 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 19:59:36,333 INFO L82 PathProgramCache]: Analyzing trace with hash -1065770165, now seen corresponding path program 1 times [2020-10-12 19:59:36,333 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 19:59:36,333 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [32536687] [2020-10-12 19:59:36,334 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 19:59:36,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:59:36,367 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:59:36,388 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:59:36,429 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:59:36,503 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:59:36,596 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:59:36,911 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:59:38,245 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:59:38,245 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 62 [2020-10-12 19:59:38,245 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-12 19:59:38,246 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1890 [2020-10-12 19:59:38,246 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:59:38,246 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-12 19:59:38,246 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-12 19:59:38,247 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 51 [2020-10-12 19:59:38,247 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:59:38,447 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 19:59:38,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:59:38,456 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:59:38,466 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:59:38,466 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 19:59:38,467 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 19:59:38,467 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 13 [2020-10-12 19:59:38,467 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:59:38,467 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 19:59:38,468 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 19:59:38,468 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-12 19:59:38,468 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:59:38,486 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 19:59:38,487 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [32536687] [2020-10-12 19:59:38,488 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 19:59:38,488 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-12 19:59:38,489 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [643285064] [2020-10-12 19:59:38,489 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-12 19:59:38,489 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 19:59:38,489 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-12 19:59:38,490 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-10-12 19:59:38,490 INFO L87 Difference]: Start difference. First operand 1055 states and 1633 transitions. Second operand 7 states. [2020-10-12 19:59:39,447 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 19:59:39,447 INFO L93 Difference]: Finished difference Result 2869 states and 4443 transitions. [2020-10-12 19:59:39,448 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-12 19:59:39,448 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 56 [2020-10-12 19:59:39,448 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 19:59:39,458 INFO L225 Difference]: With dead ends: 2869 [2020-10-12 19:59:39,458 INFO L226 Difference]: Without dead ends: 1937 [2020-10-12 19:59:39,461 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2020-10-12 19:59:39,463 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1937 states. [2020-10-12 19:59:39,573 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1937 to 1130. [2020-10-12 19:59:39,573 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1130 states. [2020-10-12 19:59:39,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1130 states to 1130 states and 1743 transitions. [2020-10-12 19:59:39,578 INFO L78 Accepts]: Start accepts. Automaton has 1130 states and 1743 transitions. Word has length 56 [2020-10-12 19:59:39,578 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 19:59:39,578 INFO L479 AbstractCegarLoop]: Abstraction has 1130 states and 1743 transitions. [2020-10-12 19:59:39,578 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-12 19:59:39,579 INFO L276 IsEmpty]: Start isEmpty. Operand 1130 states and 1743 transitions. [2020-10-12 19:59:39,580 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-10-12 19:59:39,580 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 19:59:39,581 INFO L422 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] [2020-10-12 19:59:39,581 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-12 19:59:39,581 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 19:59:39,581 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 19:59:39,582 INFO L82 PathProgramCache]: Analyzing trace with hash -356971409, now seen corresponding path program 1 times [2020-10-12 19:59:39,582 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 19:59:39,582 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1255349612] [2020-10-12 19:59:39,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 19:59:39,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:59:39,615 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:59:39,633 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:59:39,653 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:59:39,671 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:59:39,749 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:59:40,251 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:59:41,429 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:59:44,603 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:59:44,604 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 63 [2020-10-12 19:59:44,604 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-12 19:59:44,604 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4999 [2020-10-12 19:59:44,604 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:59:44,605 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-12 19:59:44,605 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-12 19:59:44,605 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 40 [2020-10-12 19:59:44,605 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:59:44,798 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 19:59:44,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:59:44,806 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:59:44,814 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:59:44,815 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 19:59:44,815 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 19:59:44,815 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-10-12 19:59:44,815 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:59:44,816 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 19:59:44,816 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 19:59:44,816 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-12 19:59:44,816 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:59:44,835 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 19:59:44,835 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1255349612] [2020-10-12 19:59:44,835 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 19:59:44,836 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-12 19:59:44,836 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2044871565] [2020-10-12 19:59:44,836 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-12 19:59:44,836 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 19:59:44,837 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-12 19:59:44,837 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-10-12 19:59:44,837 INFO L87 Difference]: Start difference. First operand 1130 states and 1743 transitions. Second operand 7 states. [2020-10-12 19:59:45,706 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 19:59:45,707 INFO L93 Difference]: Finished difference Result 2766 states and 4308 transitions. [2020-10-12 19:59:45,707 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-12 19:59:45,707 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 57 [2020-10-12 19:59:45,708 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 19:59:45,718 INFO L225 Difference]: With dead ends: 2766 [2020-10-12 19:59:45,718 INFO L226 Difference]: Without dead ends: 2053 [2020-10-12 19:59:45,720 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2020-10-12 19:59:45,723 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2053 states. [2020-10-12 19:59:45,826 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2053 to 1090. [2020-10-12 19:59:45,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1090 states. [2020-10-12 19:59:45,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1090 states to 1090 states and 1680 transitions. [2020-10-12 19:59:45,831 INFO L78 Accepts]: Start accepts. Automaton has 1090 states and 1680 transitions. Word has length 57 [2020-10-12 19:59:45,832 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 19:59:45,832 INFO L479 AbstractCegarLoop]: Abstraction has 1090 states and 1680 transitions. [2020-10-12 19:59:45,832 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-12 19:59:45,832 INFO L276 IsEmpty]: Start isEmpty. Operand 1090 states and 1680 transitions. [2020-10-12 19:59:45,834 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2020-10-12 19:59:45,834 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 19:59:45,834 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 19:59:45,835 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-12 19:59:45,835 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 19:59:45,835 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 19:59:45,835 INFO L82 PathProgramCache]: Analyzing trace with hash -1088638692, now seen corresponding path program 1 times [2020-10-12 19:59:45,836 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 19:59:45,836 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [195855240] [2020-10-12 19:59:45,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 19:59:45,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:59:45,863 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:59:45,880 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:59:45,924 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:59:45,942 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:59:46,016 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:59:46,233 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:59:46,267 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:59:46,462 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:59:49,314 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:59:49,354 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:59:50,859 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:59:50,859 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 84 [2020-10-12 19:59:50,859 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 10 [2020-10-12 19:59:50,859 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-10-12 19:59:50,860 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:59:50,860 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-12 19:59:50,860 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-12 19:59:50,860 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 69 [2020-10-12 19:59:50,860 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:59:51,076 WARN L193 SmtUtils]: Spent 132.00 ms on a formula simplification that was a NOOP. DAG size: 118 [2020-10-12 19:59:51,077 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 19:59:51,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:59:51,087 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:59:51,101 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:59:51,101 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 19:59:51,101 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 19:59:51,102 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 16 [2020-10-12 19:59:51,102 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:59:51,102 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 19:59:51,103 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 19:59:51,103 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-12 19:59:51,103 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 19:59:51,128 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 9 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 19:59:51,129 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [195855240] [2020-10-12 19:59:51,129 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 19:59:51,129 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-12 19:59:51,130 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [153855170] [2020-10-12 19:59:51,130 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-12 19:59:51,131 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 19:59:51,131 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-12 19:59:51,131 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-10-12 19:59:51,132 INFO L87 Difference]: Start difference. First operand 1090 states and 1680 transitions. Second operand 8 states. [2020-10-12 19:59:51,334 WARN L193 SmtUtils]: Spent 142.00 ms on a formula simplification that was a NOOP. DAG size: 123 [2020-10-12 19:59:52,603 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 19:59:52,604 INFO L93 Difference]: Finished difference Result 4940 states and 7663 transitions. [2020-10-12 19:59:52,604 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-12 19:59:52,605 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 78 [2020-10-12 19:59:52,605 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 19:59:52,633 INFO L225 Difference]: With dead ends: 4940 [2020-10-12 19:59:52,633 INFO L226 Difference]: Without dead ends: 4476 [2020-10-12 19:59:52,637 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=82, Invalid=190, Unknown=0, NotChecked=0, Total=272 [2020-10-12 19:59:52,643 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4476 states. [2020-10-12 19:59:52,881 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4476 to 2226. [2020-10-12 19:59:52,882 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2226 states. [2020-10-12 19:59:52,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2226 states to 2226 states and 3458 transitions. [2020-10-12 19:59:52,891 INFO L78 Accepts]: Start accepts. Automaton has 2226 states and 3458 transitions. Word has length 78 [2020-10-12 19:59:52,892 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 19:59:52,892 INFO L479 AbstractCegarLoop]: Abstraction has 2226 states and 3458 transitions. [2020-10-12 19:59:52,892 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-12 19:59:52,892 INFO L276 IsEmpty]: Start isEmpty. Operand 2226 states and 3458 transitions. [2020-10-12 19:59:52,896 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2020-10-12 19:59:52,896 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 19:59:52,896 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 19:59:52,896 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-12 19:59:52,897 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 19:59:52,897 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 19:59:52,897 INFO L82 PathProgramCache]: Analyzing trace with hash -1575474523, now seen corresponding path program 1 times [2020-10-12 19:59:52,897 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 19:59:52,898 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1499705736] [2020-10-12 19:59:52,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 19:59:52,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:59:52,927 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:59:52,946 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:59:52,965 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:59:52,985 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:59:53,070 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:59:53,258 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:59:53,288 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:59:53,317 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:59:55,603 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:59:55,654 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:59:57,922 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:59:57,922 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 84 [2020-10-12 19:59:57,922 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 10 [2020-10-12 19:59:57,922 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-12 19:59:57,923 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:59:57,923 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-12 19:59:57,923 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-12 19:59:57,923 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 73 [2020-10-12 19:59:57,923 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:59:58,184 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 118 [2020-10-12 19:59:58,185 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 19:59:58,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:59:58,194 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:59:58,202 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:59:58,202 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 19:59:58,203 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 19:59:58,203 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-12 19:59:58,203 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:59:58,203 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 19:59:58,203 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 19:59:58,204 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-12 19:59:58,204 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:59:58,231 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 5 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 19:59:58,232 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1499705736] [2020-10-12 19:59:58,232 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 19:59:58,232 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-12 19:59:58,232 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [342862904] [2020-10-12 19:59:58,233 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-12 19:59:58,233 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 19:59:58,233 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-12 19:59:58,234 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-10-12 19:59:58,234 INFO L87 Difference]: Start difference. First operand 2226 states and 3458 transitions. Second operand 8 states. [2020-10-12 19:59:58,378 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification that was a NOOP. DAG size: 125 [2020-10-12 19:59:59,787 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 19:59:59,787 INFO L93 Difference]: Finished difference Result 10514 states and 16234 transitions. [2020-10-12 19:59:59,787 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-12 19:59:59,788 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 78 [2020-10-12 19:59:59,788 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 19:59:59,835 INFO L225 Difference]: With dead ends: 10514 [2020-10-12 19:59:59,835 INFO L226 Difference]: Without dead ends: 8436 [2020-10-12 19:59:59,844 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=71, Invalid=169, Unknown=0, NotChecked=0, Total=240 [2020-10-12 19:59:59,854 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8436 states. [2020-10-12 20:00:00,361 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8436 to 4356. [2020-10-12 20:00:00,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4356 states. [2020-10-12 20:00:00,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4356 states to 4356 states and 6654 transitions. [2020-10-12 20:00:00,372 INFO L78 Accepts]: Start accepts. Automaton has 4356 states and 6654 transitions. Word has length 78 [2020-10-12 20:00:00,372 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 20:00:00,372 INFO L479 AbstractCegarLoop]: Abstraction has 4356 states and 6654 transitions. [2020-10-12 20:00:00,372 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-12 20:00:00,373 INFO L276 IsEmpty]: Start isEmpty. Operand 4356 states and 6654 transitions. [2020-10-12 20:00:00,378 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2020-10-12 20:00:00,379 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 20:00:00,379 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 20:00:00,379 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-12 20:00:00,379 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 20:00:00,380 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 20:00:00,380 INFO L82 PathProgramCache]: Analyzing trace with hash 407025608, now seen corresponding path program 1 times [2020-10-12 20:00:00,380 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 20:00:00,380 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [623565580] [2020-10-12 20:00:00,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 20:00:00,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 20:00:00,406 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:00:00,424 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:00:00,441 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:00:00,458 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:00:00,492 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:00:00,594 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:00:01,128 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:00:01,203 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:00:04,299 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:00:05,403 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 20:00:05,403 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 85 [2020-10-12 20:00:05,404 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-12 20:00:05,404 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5007 [2020-10-12 20:00:05,404 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 20:00:05,404 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-12 20:00:05,404 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-12 20:00:05,405 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 69 [2020-10-12 20:00:05,405 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 20:00:05,619 WARN L193 SmtUtils]: Spent 136.00 ms on a formula simplification that was a NOOP. DAG size: 118 [2020-10-12 20:00:05,620 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 20:00:05,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 20:00:05,628 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:00:05,636 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 20:00:05,636 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 20:00:05,636 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 20:00:05,637 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-12 20:00:05,637 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 20:00:05,637 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 20:00:05,638 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 20:00:05,638 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 20:00:05,638 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 20:00:05,671 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 2 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 20:00:05,672 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [623565580] [2020-10-12 20:00:05,672 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 20:00:05,672 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-12 20:00:05,672 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [444970373] [2020-10-12 20:00:05,673 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-12 20:00:05,673 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 20:00:05,673 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-12 20:00:05,674 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-12 20:00:05,674 INFO L87 Difference]: Start difference. First operand 4356 states and 6654 transitions. Second operand 6 states. [2020-10-12 20:00:05,878 WARN L193 SmtUtils]: Spent 155.00 ms on a formula simplification that was a NOOP. DAG size: 122 [2020-10-12 20:00:07,005 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 20:00:07,005 INFO L93 Difference]: Finished difference Result 7288 states and 11178 transitions. [2020-10-12 20:00:07,005 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-12 20:00:07,005 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 79 [2020-10-12 20:00:07,006 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 20:00:07,032 INFO L225 Difference]: With dead ends: 7288 [2020-10-12 20:00:07,032 INFO L226 Difference]: Without dead ends: 5814 [2020-10-12 20:00:07,037 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2020-10-12 20:00:07,044 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5814 states. [2020-10-12 20:00:07,493 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5814 to 5792. [2020-10-12 20:00:07,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5792 states. [2020-10-12 20:00:07,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5792 states to 5792 states and 8850 transitions. [2020-10-12 20:00:07,507 INFO L78 Accepts]: Start accepts. Automaton has 5792 states and 8850 transitions. Word has length 79 [2020-10-12 20:00:07,507 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 20:00:07,507 INFO L479 AbstractCegarLoop]: Abstraction has 5792 states and 8850 transitions. [2020-10-12 20:00:07,507 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-12 20:00:07,507 INFO L276 IsEmpty]: Start isEmpty. Operand 5792 states and 8850 transitions. [2020-10-12 20:00:07,513 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2020-10-12 20:00:07,513 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 20:00:07,514 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 20:00:07,514 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-12 20:00:07,514 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 20:00:07,514 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 20:00:07,514 INFO L82 PathProgramCache]: Analyzing trace with hash 1022062677, now seen corresponding path program 1 times [2020-10-12 20:00:07,515 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 20:00:07,515 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1047075578] [2020-10-12 20:00:07,515 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 20:00:07,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 20:00:07,541 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:00:07,560 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:00:07,575 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:00:07,588 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:00:07,734 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:00:07,758 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:00:07,805 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:00:08,859 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:00:12,536 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 20:00:12,537 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 85 [2020-10-12 20:00:12,537 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-12 20:00:12,537 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-10-12 20:00:12,537 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 20:00:12,537 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-12 20:00:12,537 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-12 20:00:12,537 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 62 [2020-10-12 20:00:12,538 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 20:00:12,779 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 118 [2020-10-12 20:00:12,780 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 20:00:12,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 20:00:12,788 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:00:12,798 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 20:00:12,798 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 20:00:12,798 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 20:00:12,798 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-10-12 20:00:12,799 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 20:00:12,799 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 20:00:12,799 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 20:00:12,799 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-12 20:00:12,799 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 20:00:12,831 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 16 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 20:00:12,831 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1047075578] [2020-10-12 20:00:12,832 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 20:00:12,832 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-12 20:00:12,832 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [843502936] [2020-10-12 20:00:12,832 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-12 20:00:12,834 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 20:00:12,834 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-12 20:00:12,834 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-10-12 20:00:12,834 INFO L87 Difference]: Start difference. First operand 5792 states and 8850 transitions. Second operand 8 states. [2020-10-12 20:00:12,971 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification that was a NOOP. DAG size: 125 [2020-10-12 20:00:14,685 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 20:00:14,685 INFO L93 Difference]: Finished difference Result 21072 states and 31870 transitions. [2020-10-12 20:00:14,686 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-12 20:00:14,686 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 79 [2020-10-12 20:00:14,686 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 20:00:14,722 INFO L225 Difference]: With dead ends: 21072 [2020-10-12 20:00:14,723 INFO L226 Difference]: Without dead ends: 15386 [2020-10-12 20:00:14,737 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=71, Invalid=169, Unknown=0, NotChecked=0, Total=240 [2020-10-12 20:00:14,754 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15386 states. [2020-10-12 20:00:15,283 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15386 to 6484. [2020-10-12 20:00:15,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6484 states. [2020-10-12 20:00:15,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6484 states to 6484 states and 9558 transitions. [2020-10-12 20:00:15,411 INFO L78 Accepts]: Start accepts. Automaton has 6484 states and 9558 transitions. Word has length 79 [2020-10-12 20:00:15,411 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 20:00:15,411 INFO L479 AbstractCegarLoop]: Abstraction has 6484 states and 9558 transitions. [2020-10-12 20:00:15,411 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-12 20:00:15,412 INFO L276 IsEmpty]: Start isEmpty. Operand 6484 states and 9558 transitions. [2020-10-12 20:00:15,417 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2020-10-12 20:00:15,418 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 20:00:15,418 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 20:00:15,418 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-12 20:00:15,418 INFO L427 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 20:00:15,419 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 20:00:15,419 INFO L82 PathProgramCache]: Analyzing trace with hash 562141846, now seen corresponding path program 1 times [2020-10-12 20:00:15,419 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 20:00:15,420 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [16815865] [2020-10-12 20:00:15,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 20:00:15,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 20:00:15,446 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:00:15,468 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:00:15,489 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:00:15,504 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:00:15,692 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:00:15,745 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:00:15,940 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:00:16,090 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:00:16,507 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:00:16,785 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:00:20,438 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 20:00:20,438 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 87 [2020-10-12 20:00:20,439 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 10 [2020-10-12 20:00:20,439 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-12 20:00:20,439 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 20:00:20,439 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-12 20:00:20,439 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 20:00:20,439 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 66 [2020-10-12 20:00:20,439 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 20:00:20,674 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 25 [2020-10-12 20:00:20,834 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 20:00:20,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 20:00:20,841 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:00:20,846 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 20:00:20,846 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 20:00:20,846 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 20:00:20,847 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-12 20:00:20,847 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 20:00:20,847 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 20:00:20,847 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 20:00:20,847 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 20:00:20,847 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 20:00:20,869 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 9 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 20:00:20,869 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [16815865] [2020-10-12 20:00:20,870 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 20:00:20,870 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-12 20:00:20,870 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1307509463] [2020-10-12 20:00:20,870 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-12 20:00:20,871 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 20:00:20,871 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-12 20:00:20,871 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=108, Unknown=0, NotChecked=0, Total=132 [2020-10-12 20:00:20,872 INFO L87 Difference]: Start difference. First operand 6484 states and 9558 transitions. Second operand 12 states. [2020-10-12 20:00:21,032 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification that was a NOOP. DAG size: 125 [2020-10-12 20:00:34,681 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 20:00:34,682 INFO L93 Difference]: Finished difference Result 90532 states and 131941 transitions. [2020-10-12 20:00:34,682 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2020-10-12 20:00:34,682 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 81 [2020-10-12 20:00:34,683 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 20:00:34,904 INFO L225 Difference]: With dead ends: 90532 [2020-10-12 20:00:34,904 INFO L226 Difference]: Without dead ends: 84134 [2020-10-12 20:00:34,937 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1059 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=722, Invalid=2700, Unknown=0, NotChecked=0, Total=3422 [2020-10-12 20:00:35,025 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84134 states. [2020-10-12 20:00:38,708 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84134 to 21752. [2020-10-12 20:00:38,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21752 states. [2020-10-12 20:00:38,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21752 states to 21752 states and 31940 transitions. [2020-10-12 20:00:38,737 INFO L78 Accepts]: Start accepts. Automaton has 21752 states and 31940 transitions. Word has length 81 [2020-10-12 20:00:38,737 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 20:00:38,737 INFO L479 AbstractCegarLoop]: Abstraction has 21752 states and 31940 transitions. [2020-10-12 20:00:38,737 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-12 20:00:38,737 INFO L276 IsEmpty]: Start isEmpty. Operand 21752 states and 31940 transitions. [2020-10-12 20:00:38,747 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2020-10-12 20:00:38,747 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 20:00:38,747 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 20:00:38,748 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-12 20:00:38,748 INFO L427 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 20:00:38,748 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 20:00:38,748 INFO L82 PathProgramCache]: Analyzing trace with hash 246563872, now seen corresponding path program 1 times [2020-10-12 20:00:38,749 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 20:00:38,749 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1162285976] [2020-10-12 20:00:38,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 20:00:38,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 20:00:38,777 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:00:38,797 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:00:38,817 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:00:38,840 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:00:38,944 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:00:39,264 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:00:39,298 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:00:39,615 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:00:43,769 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 20:00:43,770 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 87 [2020-10-12 20:00:43,770 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-12 20:00:43,770 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-12 20:00:43,770 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 20:00:43,770 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-12 20:00:43,770 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 20:00:43,770 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 67 [2020-10-12 20:00:43,770 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 20:00:44,056 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 20:00:44,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 20:00:44,062 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:00:44,065 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 20:00:44,065 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 20:00:44,066 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 20:00:44,066 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-12 20:00:44,066 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 20:00:44,066 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 20:00:44,066 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 20:00:44,067 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 20:00:44,067 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 20:00:44,083 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 5 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 20:00:44,084 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1162285976] [2020-10-12 20:00:44,084 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 20:00:44,084 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-12 20:00:44,084 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1120049854] [2020-10-12 20:00:44,084 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-12 20:00:44,084 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 20:00:44,085 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-12 20:00:44,085 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2020-10-12 20:00:44,085 INFO L87 Difference]: Start difference. First operand 21752 states and 31940 transitions. Second operand 10 states. [2020-10-12 20:00:44,222 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 124 [2020-10-12 20:01:07,542 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 20:01:07,543 INFO L93 Difference]: Finished difference Result 202517 states and 293909 transitions. [2020-10-12 20:01:07,543 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2020-10-12 20:01:07,543 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 81 [2020-10-12 20:01:07,543 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 20:01:07,952 INFO L225 Difference]: With dead ends: 202517 [2020-10-12 20:01:07,952 INFO L226 Difference]: Without dead ends: 180871 [2020-10-12 20:01:08,019 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 564 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=357, Invalid=1449, Unknown=0, NotChecked=0, Total=1806 [2020-10-12 20:01:08,183 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 180871 states. [2020-10-12 20:01:19,827 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 180871 to 85116. [2020-10-12 20:01:19,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85116 states. [2020-10-12 20:01:19,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85116 states to 85116 states and 125560 transitions. [2020-10-12 20:01:19,955 INFO L78 Accepts]: Start accepts. Automaton has 85116 states and 125560 transitions. Word has length 81 [2020-10-12 20:01:19,956 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 20:01:19,956 INFO L479 AbstractCegarLoop]: Abstraction has 85116 states and 125560 transitions. [2020-10-12 20:01:19,956 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-12 20:01:19,956 INFO L276 IsEmpty]: Start isEmpty. Operand 85116 states and 125560 transitions. [2020-10-12 20:01:19,974 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2020-10-12 20:01:19,974 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 20:01:19,975 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 20:01:19,975 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-12 20:01:19,975 INFO L427 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 20:01:19,975 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 20:01:19,975 INFO L82 PathProgramCache]: Analyzing trace with hash -2143177723, now seen corresponding path program 1 times [2020-10-12 20:01:19,976 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 20:01:19,976 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1956536475] [2020-10-12 20:01:19,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 20:01:19,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 20:01:20,002 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:01:20,022 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:01:20,039 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:01:20,052 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:01:20,163 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:01:20,461 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:01:20,478 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:01:24,998 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 20:01:24,999 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 87 [2020-10-12 20:01:24,999 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-12 20:01:24,999 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5006 [2020-10-12 20:01:24,999 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 20:01:24,999 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-12 20:01:24,999 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 20:01:24,999 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 70 [2020-10-12 20:01:24,999 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 20:01:25,321 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 20:01:25,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 20:01:25,325 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:01:25,328 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 20:01:25,328 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 20:01:25,328 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 20:01:25,328 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-12 20:01:25,328 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 20:01:25,328 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 20:01:25,328 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 20:01:25,329 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 20:01:25,329 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 20:01:25,349 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 5 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 20:01:25,349 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1956536475] [2020-10-12 20:01:25,349 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 20:01:25,350 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-12 20:01:25,350 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1408975236] [2020-10-12 20:01:25,350 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-12 20:01:25,350 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 20:01:25,350 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-12 20:01:25,350 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2020-10-12 20:01:25,351 INFO L87 Difference]: Start difference. First operand 85116 states and 125560 transitions. Second operand 10 states. [2020-10-12 20:01:25,512 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification that was a NOOP. DAG size: 130 [2020-10-12 20:02:30,305 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 20:02:30,306 INFO L93 Difference]: Finished difference Result 564500 states and 833492 transitions. [2020-10-12 20:02:30,306 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-12 20:02:30,306 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 81 [2020-10-12 20:02:30,306 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 20:02:31,112 INFO L225 Difference]: With dead ends: 564500 [2020-10-12 20:02:31,112 INFO L226 Difference]: Without dead ends: 479490 [2020-10-12 20:02:31,247 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 228 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=257, Invalid=735, Unknown=0, NotChecked=0, Total=992 [2020-10-12 20:02:31,612 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 479490 states.