/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/array-examples/sorting_selectionsort_ground-2.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-adbd35c [2020-10-12 09:47:01,687 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-12 09:47:01,691 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-12 09:47:01,748 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-12 09:47:01,748 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-12 09:47:01,763 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-12 09:47:01,764 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-12 09:47:01,767 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-12 09:47:01,772 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-12 09:47:01,773 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-12 09:47:01,776 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-12 09:47:01,779 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-12 09:47:01,780 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-12 09:47:01,785 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-12 09:47:01,790 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-12 09:47:01,793 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-12 09:47:01,794 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-12 09:47:01,797 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-12 09:47:01,799 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-12 09:47:01,809 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-12 09:47:01,813 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-12 09:47:01,815 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-12 09:47:01,816 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-12 09:47:01,818 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-12 09:47:01,823 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-12 09:47:01,824 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-12 09:47:01,824 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-12 09:47:01,828 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-12 09:47:01,829 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-12 09:47:01,831 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-12 09:47:01,832 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-12 09:47:01,833 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-12 09:47:01,834 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-12 09:47:01,835 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-12 09:47:01,837 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-12 09:47:01,837 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-12 09:47:01,838 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-12 09:47:01,838 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-12 09:47:01,838 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-12 09:47:01,840 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-12 09:47:01,843 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-12 09:47:01,844 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 09:47:01,892 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-12 09:47:01,892 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-12 09:47:01,895 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-12 09:47:01,895 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-12 09:47:01,895 INFO L138 SettingsManager]: * Use SBE=true [2020-10-12 09:47:01,895 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-12 09:47:01,896 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-12 09:47:01,896 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-12 09:47:01,896 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-12 09:47:01,896 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-12 09:47:01,897 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-12 09:47:01,898 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-12 09:47:01,898 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-12 09:47:01,898 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-12 09:47:01,898 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-12 09:47:01,899 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-12 09:47:01,899 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-12 09:47:01,899 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-12 09:47:01,899 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-12 09:47:01,899 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-12 09:47:01,899 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-12 09:47:01,900 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-12 09:47:01,900 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-12 09:47:01,900 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-12 09:47:01,900 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-12 09:47:01,900 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-12 09:47:01,901 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-12 09:47:01,901 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-12 09:47:01,901 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-12 09:47:01,901 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 09:47:02,207 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-12 09:47:02,227 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-12 09:47:02,232 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-12 09:47:02,234 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-12 09:47:02,235 INFO L275 PluginConnector]: CDTParser initialized [2020-10-12 09:47:02,235 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-examples/sorting_selectionsort_ground-2.i [2020-10-12 09:47:02,308 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/c184b9061/7d0b2b218b97457c823bb78aab330847/FLAGab7fd173a [2020-10-12 09:47:02,775 INFO L306 CDTParser]: Found 1 translation units. [2020-10-12 09:47:02,776 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/array-examples/sorting_selectionsort_ground-2.i [2020-10-12 09:47:02,783 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/c184b9061/7d0b2b218b97457c823bb78aab330847/FLAGab7fd173a [2020-10-12 09:47:03,155 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/c184b9061/7d0b2b218b97457c823bb78aab330847 [2020-10-12 09:47:03,166 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-12 09:47:03,168 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-12 09:47:03,170 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-12 09:47:03,170 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-12 09:47:03,175 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-12 09:47:03,176 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.10 09:47:03" (1/1) ... [2020-10-12 09:47:03,180 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@176ea22d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 09:47:03, skipping insertion in model container [2020-10-12 09:47:03,180 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.10 09:47:03" (1/1) ... [2020-10-12 09:47:03,190 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-12 09:47:03,214 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-12 09:47:03,446 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-12 09:47:03,451 INFO L203 MainTranslator]: Completed pre-run [2020-10-12 09:47:03,482 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-12 09:47:03,600 INFO L208 MainTranslator]: Completed translation [2020-10-12 09:47:03,601 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 09:47:03 WrapperNode [2020-10-12 09:47:03,601 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-12 09:47:03,602 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-12 09:47:03,602 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-12 09:47:03,602 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-12 09:47:03,615 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 09:47:03" (1/1) ... [2020-10-12 09:47:03,616 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 09:47:03" (1/1) ... [2020-10-12 09:47:03,630 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 09:47:03" (1/1) ... [2020-10-12 09:47:03,630 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 09:47:03" (1/1) ... [2020-10-12 09:47:03,641 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 09:47:03" (1/1) ... [2020-10-12 09:47:03,649 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 09:47:03" (1/1) ... [2020-10-12 09:47:03,651 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 09:47:03" (1/1) ... [2020-10-12 09:47:03,655 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-12 09:47:03,656 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-12 09:47:03,656 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-12 09:47:03,656 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-12 09:47:03,657 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 09:47:03" (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 09:47:03,724 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-12 09:47:03,724 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-12 09:47:03,725 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-12 09:47:03,725 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-12 09:47:03,725 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-10-12 09:47:03,725 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-12 09:47:03,726 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-12 09:47:03,727 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-12 09:47:03,727 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-12 09:47:03,727 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-12 09:47:03,728 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-12 09:47:03,728 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-12 09:47:03,728 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-12 09:47:03,728 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-12 09:47:04,073 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-12 09:47:04,074 INFO L295 CfgBuilder]: Removed 8 assume(true) statements. [2020-10-12 09:47:04,081 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.10 09:47:04 BoogieIcfgContainer [2020-10-12 09:47:04,081 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-12 09:47:04,084 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-12 09:47:04,084 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-12 09:47:04,089 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-12 09:47:04,090 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.10 09:47:03" (1/3) ... [2020-10-12 09:47:04,092 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5df908ec and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.10 09:47:04, skipping insertion in model container [2020-10-12 09:47:04,092 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 09:47:03" (2/3) ... [2020-10-12 09:47:04,093 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5df908ec and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.10 09:47:04, skipping insertion in model container [2020-10-12 09:47:04,093 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.10 09:47:04" (3/3) ... [2020-10-12 09:47:04,096 INFO L109 eAbstractionObserver]: Analyzing ICFG sorting_selectionsort_ground-2.i [2020-10-12 09:47:04,111 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-12 09:47:04,122 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-12 09:47:04,148 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-12 09:47:04,201 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-10-12 09:47:04,201 INFO L376 AbstractCegarLoop]: Hoare is true [2020-10-12 09:47:04,201 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-12 09:47:04,201 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-12 09:47:04,201 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-12 09:47:04,202 INFO L380 AbstractCegarLoop]: Difference is false [2020-10-12 09:47:04,202 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-12 09:47:04,202 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-12 09:47:04,230 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states. [2020-10-12 09:47:04,237 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-10-12 09:47:04,237 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:47:04,238 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:47:04,239 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:47:04,245 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:47:04,246 INFO L82 PathProgramCache]: Analyzing trace with hash 1156372912, now seen corresponding path program 1 times [2020-10-12 09:47:04,260 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:47:04,261 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2082988342] [2020-10-12 09:47:04,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:47:04,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:47:04,389 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:47:04,416 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:47:04,541 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:47:04,542 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 24 [2020-10-12 09:47:04,542 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 09:47:04,542 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 170 [2020-10-12 09:47:04,546 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:47:04,547 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:47:04,547 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-12 09:47:04,548 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:47:04,548 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 5 [2020-10-12 09:47:04,609 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:47:04,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:47:04,616 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:47:04,622 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:47:04,623 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:47:04,624 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:47:04,624 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-12 09:47:04,624 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:47:04,625 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:47:04,625 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:47:04,625 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:47:04,625 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 09:47:04,635 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 09:47:04,644 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2082988342] [2020-10-12 09:47:04,646 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 09:47:04,646 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-12 09:47:04,648 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2037186979] [2020-10-12 09:47:04,654 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-12 09:47:04,654 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:47:04,669 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-12 09:47:04,671 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-12 09:47:04,673 INFO L87 Difference]: Start difference. First operand 45 states. Second operand 3 states. [2020-10-12 09:47:04,847 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:47:04,848 INFO L93 Difference]: Finished difference Result 82 states and 123 transitions. [2020-10-12 09:47:04,849 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-12 09:47:04,851 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 16 [2020-10-12 09:47:04,851 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:47:04,862 INFO L225 Difference]: With dead ends: 82 [2020-10-12 09:47:04,862 INFO L226 Difference]: Without dead ends: 40 [2020-10-12 09:47:04,866 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-12 09:47:04,882 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2020-10-12 09:47:04,909 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2020-10-12 09:47:04,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-10-12 09:47:04,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 51 transitions. [2020-10-12 09:47:04,914 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 51 transitions. Word has length 16 [2020-10-12 09:47:04,915 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:47:04,915 INFO L479 AbstractCegarLoop]: Abstraction has 40 states and 51 transitions. [2020-10-12 09:47:04,915 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-12 09:47:04,915 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 51 transitions. [2020-10-12 09:47:04,916 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-10-12 09:47:04,916 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:47:04,917 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:47:04,918 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-12 09:47:04,918 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:47:04,918 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:47:04,919 INFO L82 PathProgramCache]: Analyzing trace with hash -2078459264, now seen corresponding path program 1 times [2020-10-12 09:47:04,919 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:47:04,919 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [457186139] [2020-10-12 09:47:04,919 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:47:04,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:47:04,955 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:47:05,014 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:47:05,203 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:47:05,204 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 24 [2020-10-12 09:47:05,204 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 09:47:05,204 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 264 [2020-10-12 09:47:05,204 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:47:05,205 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 09:47:05,205 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 09:47:05,205 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-12 09:47:05,206 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 09:47:05,236 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:47:05,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:47:05,240 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:47:05,245 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:47:05,245 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:47:05,246 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:47:05,246 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-12 09:47:05,246 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:47:05,246 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:47:05,247 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:47:05,247 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:47:05,247 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 09:47:05,252 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 09:47:05,253 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [457186139] [2020-10-12 09:47:05,253 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 09:47:05,253 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-12 09:47:05,254 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [267561250] [2020-10-12 09:47:05,256 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-12 09:47:05,256 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:47:05,257 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-12 09:47:05,257 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-12 09:47:05,257 INFO L87 Difference]: Start difference. First operand 40 states and 51 transitions. Second operand 4 states. [2020-10-12 09:47:05,406 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:47:05,407 INFO L93 Difference]: Finished difference Result 74 states and 96 transitions. [2020-10-12 09:47:05,407 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-12 09:47:05,408 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 16 [2020-10-12 09:47:05,408 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:47:05,409 INFO L225 Difference]: With dead ends: 74 [2020-10-12 09:47:05,409 INFO L226 Difference]: Without dead ends: 42 [2020-10-12 09:47:05,411 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-12 09:47:05,412 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-10-12 09:47:05,421 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 41. [2020-10-12 09:47:05,421 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2020-10-12 09:47:05,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 52 transitions. [2020-10-12 09:47:05,423 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 52 transitions. Word has length 16 [2020-10-12 09:47:05,423 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:47:05,424 INFO L479 AbstractCegarLoop]: Abstraction has 41 states and 52 transitions. [2020-10-12 09:47:05,424 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-12 09:47:05,424 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 52 transitions. [2020-10-12 09:47:05,425 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-10-12 09:47:05,445 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:47:05,445 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:47:05,446 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-12 09:47:05,446 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:47:05,447 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:47:05,447 INFO L82 PathProgramCache]: Analyzing trace with hash -1609541534, now seen corresponding path program 1 times [2020-10-12 09:47:05,447 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:47:05,448 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1543940434] [2020-10-12 09:47:05,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:47:05,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:47:05,466 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:47:05,485 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:47:05,638 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:47:05,641 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 26 [2020-10-12 09:47:05,641 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 09:47:05,641 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 177 [2020-10-12 09:47:05,642 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:47:05,642 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-12 09:47:05,642 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 09:47:05,642 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 4 [2020-10-12 09:47:05,643 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:47:05,682 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:47:05,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:47:05,686 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:47:05,690 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:47:05,690 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:47:05,691 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:47:05,691 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-12 09:47:05,691 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:47:05,691 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:47:05,692 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:47:05,692 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:47:05,692 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:47:05,698 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 09:47:05,698 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1543940434] [2020-10-12 09:47:05,698 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:47:05,699 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-12 09:47:05,699 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [390861456] [2020-10-12 09:47:05,700 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-12 09:47:05,700 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:47:05,700 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-12 09:47:05,702 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-12 09:47:05,702 INFO L87 Difference]: Start difference. First operand 41 states and 52 transitions. Second operand 5 states. [2020-10-12 09:47:05,837 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:47:05,837 INFO L93 Difference]: Finished difference Result 76 states and 98 transitions. [2020-10-12 09:47:05,837 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-12 09:47:05,838 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 18 [2020-10-12 09:47:05,838 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:47:05,839 INFO L225 Difference]: With dead ends: 76 [2020-10-12 09:47:05,839 INFO L226 Difference]: Without dead ends: 44 [2020-10-12 09:47:05,842 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-12 09:47:05,842 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2020-10-12 09:47:05,852 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 43. [2020-10-12 09:47:05,852 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2020-10-12 09:47:05,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 54 transitions. [2020-10-12 09:47:05,855 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 54 transitions. Word has length 18 [2020-10-12 09:47:05,855 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:47:05,856 INFO L479 AbstractCegarLoop]: Abstraction has 43 states and 54 transitions. [2020-10-12 09:47:05,856 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-12 09:47:05,857 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 54 transitions. [2020-10-12 09:47:05,857 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-10-12 09:47:05,857 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:47:05,858 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:47:05,858 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-12 09:47:05,858 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:47:05,858 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:47:05,859 INFO L82 PathProgramCache]: Analyzing trace with hash -1951169084, now seen corresponding path program 2 times [2020-10-12 09:47:05,859 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:47:05,859 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1749449337] [2020-10-12 09:47:05,859 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:47:05,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:47:05,877 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:47:05,888 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:47:06,043 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:47:06,043 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 28 [2020-10-12 09:47:06,044 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 09:47:06,044 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 171 [2020-10-12 09:47:06,044 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:47:06,044 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-12 09:47:06,045 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 09:47:06,045 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-12 09:47:06,045 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:47:06,079 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:47:06,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:47:06,082 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:47:06,085 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:47:06,085 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:47:06,085 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:47:06,086 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-12 09:47:06,086 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:47:06,086 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:47:06,086 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:47:06,087 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:47:06,087 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:47:06,090 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 09:47:06,090 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1749449337] [2020-10-12 09:47:06,091 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:47:06,091 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-12 09:47:06,091 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1611529882] [2020-10-12 09:47:06,092 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-12 09:47:06,092 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:47:06,092 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-12 09:47:06,093 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-12 09:47:06,093 INFO L87 Difference]: Start difference. First operand 43 states and 54 transitions. Second operand 6 states. [2020-10-12 09:47:06,226 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:47:06,226 INFO L93 Difference]: Finished difference Result 78 states and 100 transitions. [2020-10-12 09:47:06,227 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-12 09:47:06,227 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 20 [2020-10-12 09:47:06,227 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:47:06,228 INFO L225 Difference]: With dead ends: 78 [2020-10-12 09:47:06,228 INFO L226 Difference]: Without dead ends: 46 [2020-10-12 09:47:06,229 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-12 09:47:06,230 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2020-10-12 09:47:06,236 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 45. [2020-10-12 09:47:06,236 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-10-12 09:47:06,237 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 56 transitions. [2020-10-12 09:47:06,238 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 56 transitions. Word has length 20 [2020-10-12 09:47:06,238 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:47:06,238 INFO L479 AbstractCegarLoop]: Abstraction has 45 states and 56 transitions. [2020-10-12 09:47:06,238 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-12 09:47:06,238 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 56 transitions. [2020-10-12 09:47:06,239 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-12 09:47:06,239 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:47:06,239 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:47:06,240 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-12 09:47:06,240 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:47:06,240 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:47:06,241 INFO L82 PathProgramCache]: Analyzing trace with hash 457237158, now seen corresponding path program 3 times [2020-10-12 09:47:06,241 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:47:06,241 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1886723953] [2020-10-12 09:47:06,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:47:06,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:47:06,261 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:47:06,273 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:47:06,508 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:47:06,508 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 30 [2020-10-12 09:47:06,509 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 09:47:06,509 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 253 [2020-10-12 09:47:06,509 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:47:06,510 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-12 09:47:06,510 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 09:47:06,510 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-12 09:47:06,510 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 09:47:06,565 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:47:06,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:47:06,568 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:47:06,570 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:47:06,571 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:47:06,571 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:47:06,571 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 09:47:06,572 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:47:06,572 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:47:06,572 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:47:06,572 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:47:06,573 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 09:47:06,578 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 09:47:06,578 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1886723953] [2020-10-12 09:47:06,579 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:47:06,579 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-12 09:47:06,580 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1676325308] [2020-10-12 09:47:06,581 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-12 09:47:06,581 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:47:06,582 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-12 09:47:06,583 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-10-12 09:47:06,583 INFO L87 Difference]: Start difference. First operand 45 states and 56 transitions. Second operand 7 states. [2020-10-12 09:47:06,761 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:47:06,761 INFO L93 Difference]: Finished difference Result 80 states and 102 transitions. [2020-10-12 09:47:06,762 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-12 09:47:06,762 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 22 [2020-10-12 09:47:06,763 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:47:06,763 INFO L225 Difference]: With dead ends: 80 [2020-10-12 09:47:06,764 INFO L226 Difference]: Without dead ends: 48 [2020-10-12 09:47:06,765 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-10-12 09:47:06,766 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2020-10-12 09:47:06,778 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 47. [2020-10-12 09:47:06,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2020-10-12 09:47:06,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 58 transitions. [2020-10-12 09:47:06,782 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 58 transitions. Word has length 22 [2020-10-12 09:47:06,782 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:47:06,782 INFO L479 AbstractCegarLoop]: Abstraction has 47 states and 58 transitions. [2020-10-12 09:47:06,783 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-12 09:47:06,783 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 58 transitions. [2020-10-12 09:47:06,784 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-12 09:47:06,784 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:47:06,785 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:47:06,785 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-12 09:47:06,785 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:47:06,786 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:47:06,786 INFO L82 PathProgramCache]: Analyzing trace with hash -51736824, now seen corresponding path program 4 times [2020-10-12 09:47:06,786 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:47:06,787 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [448546963] [2020-10-12 09:47:06,787 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:47:06,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:47:06,816 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:47:06,828 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:47:07,136 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:47:07,137 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 32 [2020-10-12 09:47:07,137 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 09:47:07,137 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 328 [2020-10-12 09:47:07,137 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:47:07,138 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-12 09:47:07,138 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 09:47:07,138 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-12 09:47:07,138 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:47:07,200 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:47:07,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:47:07,204 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:47:07,206 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:47:07,206 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:47:07,207 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:47:07,207 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-12 09:47:07,207 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:47:07,207 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:47:07,208 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:47:07,208 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:47:07,208 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:47:07,212 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 09:47:07,213 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [448546963] [2020-10-12 09:47:07,214 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:47:07,214 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-12 09:47:07,215 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [70127885] [2020-10-12 09:47:07,215 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-12 09:47:07,217 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:47:07,218 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-12 09:47:07,218 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-10-12 09:47:07,219 INFO L87 Difference]: Start difference. First operand 47 states and 58 transitions. Second operand 8 states. [2020-10-12 09:47:07,356 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:47:07,356 INFO L93 Difference]: Finished difference Result 82 states and 104 transitions. [2020-10-12 09:47:07,357 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-12 09:47:07,357 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 24 [2020-10-12 09:47:07,358 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:47:07,362 INFO L225 Difference]: With dead ends: 82 [2020-10-12 09:47:07,362 INFO L226 Difference]: Without dead ends: 50 [2020-10-12 09:47:07,363 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-10-12 09:47:07,364 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2020-10-12 09:47:07,379 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 49. [2020-10-12 09:47:07,380 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2020-10-12 09:47:07,383 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 60 transitions. [2020-10-12 09:47:07,388 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 60 transitions. Word has length 24 [2020-10-12 09:47:07,389 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:47:07,389 INFO L479 AbstractCegarLoop]: Abstraction has 49 states and 60 transitions. [2020-10-12 09:47:07,389 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-12 09:47:07,390 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 60 transitions. [2020-10-12 09:47:07,390 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-12 09:47:07,391 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:47:07,394 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:47:07,395 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-12 09:47:07,395 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:47:07,395 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:47:07,395 INFO L82 PathProgramCache]: Analyzing trace with hash 450538218, now seen corresponding path program 5 times [2020-10-12 09:47:07,396 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:47:07,396 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1335672789] [2020-10-12 09:47:07,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:47:07,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:47:07,419 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:47:07,441 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:47:07,708 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:47:07,708 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 34 [2020-10-12 09:47:07,708 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 09:47:07,708 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 296 [2020-10-12 09:47:07,709 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:47:07,709 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-12 09:47:07,709 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 09:47:07,709 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-12 09:47:07,710 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:47:07,775 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:47:07,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:47:07,777 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:47:07,779 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:47:07,779 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:47:07,780 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:47:07,780 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 09:47:07,780 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:47:07,781 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:47:07,781 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:47:07,781 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:47:07,782 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 09:47:07,785 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 09:47:07,786 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1335672789] [2020-10-12 09:47:07,786 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:47:07,786 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-12 09:47:07,787 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1504073313] [2020-10-12 09:47:07,787 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-12 09:47:07,787 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:47:07,788 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-12 09:47:07,788 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-10-12 09:47:07,788 INFO L87 Difference]: Start difference. First operand 49 states and 60 transitions. Second operand 9 states. [2020-10-12 09:47:07,913 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:47:07,913 INFO L93 Difference]: Finished difference Result 84 states and 106 transitions. [2020-10-12 09:47:07,913 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-12 09:47:07,914 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 26 [2020-10-12 09:47:07,914 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:47:07,915 INFO L225 Difference]: With dead ends: 84 [2020-10-12 09:47:07,915 INFO L226 Difference]: Without dead ends: 52 [2020-10-12 09:47:07,916 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-10-12 09:47:07,916 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2020-10-12 09:47:07,921 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 51. [2020-10-12 09:47:07,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-10-12 09:47:07,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 62 transitions. [2020-10-12 09:47:07,922 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 62 transitions. Word has length 26 [2020-10-12 09:47:07,923 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:47:07,923 INFO L479 AbstractCegarLoop]: Abstraction has 51 states and 62 transitions. [2020-10-12 09:47:07,923 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-12 09:47:07,923 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 62 transitions. [2020-10-12 09:47:07,924 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-12 09:47:07,924 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:47:07,924 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:47:07,924 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-12 09:47:07,925 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:47:07,925 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:47:07,925 INFO L82 PathProgramCache]: Analyzing trace with hash 2100516428, now seen corresponding path program 6 times [2020-10-12 09:47:07,925 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:47:07,926 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [276804094] [2020-10-12 09:47:07,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:47:07,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:47:07,944 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:47:07,962 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:47:08,231 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:47:08,231 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 36 [2020-10-12 09:47:08,232 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 09:47:08,232 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 293 [2020-10-12 09:47:08,232 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:47:08,232 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-12 09:47:08,232 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 09:47:08,233 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-12 09:47:08,233 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:47:08,300 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:47:08,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:47:08,303 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:47:08,306 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:47:08,307 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:47:08,307 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:47:08,307 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-12 09:47:08,307 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:47:08,307 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:47:08,308 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:47:08,308 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:47:08,308 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:47:08,311 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 09:47:08,312 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [276804094] [2020-10-12 09:47:08,312 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:47:08,312 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-12 09:47:08,313 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [707069101] [2020-10-12 09:47:08,313 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-12 09:47:08,314 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:47:08,314 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-12 09:47:08,314 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2020-10-12 09:47:08,314 INFO L87 Difference]: Start difference. First operand 51 states and 62 transitions. Second operand 10 states. [2020-10-12 09:47:08,487 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:47:08,488 INFO L93 Difference]: Finished difference Result 86 states and 108 transitions. [2020-10-12 09:47:08,488 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-12 09:47:08,488 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 28 [2020-10-12 09:47:08,489 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:47:08,490 INFO L225 Difference]: With dead ends: 86 [2020-10-12 09:47:08,490 INFO L226 Difference]: Without dead ends: 54 [2020-10-12 09:47:08,491 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2020-10-12 09:47:08,491 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-10-12 09:47:08,496 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 53. [2020-10-12 09:47:08,497 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2020-10-12 09:47:08,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 64 transitions. [2020-10-12 09:47:08,498 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 64 transitions. Word has length 28 [2020-10-12 09:47:08,499 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:47:08,499 INFO L479 AbstractCegarLoop]: Abstraction has 53 states and 64 transitions. [2020-10-12 09:47:08,499 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-12 09:47:08,499 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 64 transitions. [2020-10-12 09:47:08,500 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-10-12 09:47:08,500 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:47:08,500 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:47:08,501 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-12 09:47:08,501 INFO L427 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:47:08,501 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:47:08,501 INFO L82 PathProgramCache]: Analyzing trace with hash -1408323282, now seen corresponding path program 7 times [2020-10-12 09:47:08,501 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:47:08,502 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [680268348] [2020-10-12 09:47:08,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:47:08,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:47:08,523 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:47:08,548 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:47:08,972 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:47:08,973 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 38 [2020-10-12 09:47:08,973 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 09:47:08,973 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 457 [2020-10-12 09:47:08,973 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:47:08,973 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-12 09:47:08,974 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 09:47:08,974 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-12 09:47:08,974 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:47:09,071 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:47:09,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:47:09,074 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:47:09,076 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:47:09,077 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:47:09,077 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:47:09,077 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 09:47:09,077 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:47:09,078 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:47:09,078 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:47:09,078 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:47:09,078 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:47:09,082 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 09:47:09,087 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [680268348] [2020-10-12 09:47:09,088 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:47:09,089 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-12 09:47:09,089 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1581659096] [2020-10-12 09:47:09,090 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-12 09:47:09,090 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:47:09,090 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-12 09:47:09,091 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2020-10-12 09:47:09,091 INFO L87 Difference]: Start difference. First operand 53 states and 64 transitions. Second operand 11 states. [2020-10-12 09:47:09,277 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:47:09,278 INFO L93 Difference]: Finished difference Result 88 states and 110 transitions. [2020-10-12 09:47:09,278 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-12 09:47:09,279 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 30 [2020-10-12 09:47:09,279 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:47:09,280 INFO L225 Difference]: With dead ends: 88 [2020-10-12 09:47:09,280 INFO L226 Difference]: Without dead ends: 56 [2020-10-12 09:47:09,281 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2020-10-12 09:47:09,285 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2020-10-12 09:47:09,302 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 55. [2020-10-12 09:47:09,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2020-10-12 09:47:09,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 66 transitions. [2020-10-12 09:47:09,305 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 66 transitions. Word has length 30 [2020-10-12 09:47:09,305 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:47:09,305 INFO L479 AbstractCegarLoop]: Abstraction has 55 states and 66 transitions. [2020-10-12 09:47:09,305 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-12 09:47:09,306 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 66 transitions. [2020-10-12 09:47:09,307 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-10-12 09:47:09,307 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:47:09,307 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:47:09,307 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-12 09:47:09,308 INFO L427 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:47:09,308 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:47:09,311 INFO L82 PathProgramCache]: Analyzing trace with hash -1853957232, now seen corresponding path program 8 times [2020-10-12 09:47:09,311 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:47:09,312 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1881788202] [2020-10-12 09:47:09,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:47:09,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:47:09,342 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:47:09,379 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:47:09,911 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:47:09,912 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 40 [2020-10-12 09:47:09,912 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 09:47:09,912 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 579 [2020-10-12 09:47:09,912 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:47:09,913 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-12 09:47:09,913 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 09:47:09,913 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-12 09:47:09,913 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:47:10,019 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:47:10,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:47:10,021 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:47:10,022 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:47:10,022 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:47:10,022 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:47:10,022 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 09:47:10,023 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:47:10,023 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:47:10,023 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:47:10,023 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:47:10,023 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:47:10,026 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 09:47:10,026 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1881788202] [2020-10-12 09:47:10,027 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:47:10,027 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-12 09:47:10,027 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1530551902] [2020-10-12 09:47:10,027 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-12 09:47:10,028 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:47:10,028 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-12 09:47:10,028 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2020-10-12 09:47:10,028 INFO L87 Difference]: Start difference. First operand 55 states and 66 transitions. Second operand 12 states. [2020-10-12 09:47:10,145 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:47:10,145 INFO L93 Difference]: Finished difference Result 90 states and 112 transitions. [2020-10-12 09:47:10,145 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-12 09:47:10,146 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 32 [2020-10-12 09:47:10,146 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:47:10,147 INFO L225 Difference]: With dead ends: 90 [2020-10-12 09:47:10,147 INFO L226 Difference]: Without dead ends: 58 [2020-10-12 09:47:10,148 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2020-10-12 09:47:10,148 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2020-10-12 09:47:10,152 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 57. [2020-10-12 09:47:10,153 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-10-12 09:47:10,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 68 transitions. [2020-10-12 09:47:10,153 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 68 transitions. Word has length 32 [2020-10-12 09:47:10,154 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:47:10,154 INFO L479 AbstractCegarLoop]: Abstraction has 57 states and 68 transitions. [2020-10-12 09:47:10,154 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-12 09:47:10,154 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 68 transitions. [2020-10-12 09:47:10,155 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-10-12 09:47:10,155 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:47:10,155 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:47:10,156 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-12 09:47:10,156 INFO L427 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:47:10,156 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:47:10,156 INFO L82 PathProgramCache]: Analyzing trace with hash -611453582, now seen corresponding path program 9 times [2020-10-12 09:47:10,156 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:47:10,157 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1810444857] [2020-10-12 09:47:10,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:47:10,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:47:10,174 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:47:10,195 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:47:10,615 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:47:10,615 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 42 [2020-10-12 09:47:10,615 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 09:47:10,615 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 446 [2020-10-12 09:47:10,616 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:47:10,616 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-12 09:47:10,616 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 09:47:10,616 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-12 09:47:10,616 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:47:10,710 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:47:10,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:47:10,713 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:47:10,714 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:47:10,714 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:47:10,714 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:47:10,714 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 09:47:10,715 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:47:10,715 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:47:10,715 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:47:10,715 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:47:10,715 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:47:10,718 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 09:47:10,719 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1810444857] [2020-10-12 09:47:10,719 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:47:10,719 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-12 09:47:10,719 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1198629407] [2020-10-12 09:47:10,720 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-12 09:47:10,720 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:47:10,720 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-12 09:47:10,720 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2020-10-12 09:47:10,720 INFO L87 Difference]: Start difference. First operand 57 states and 68 transitions. Second operand 13 states. [2020-10-12 09:47:10,834 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:47:10,834 INFO L93 Difference]: Finished difference Result 92 states and 114 transitions. [2020-10-12 09:47:10,834 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-12 09:47:10,835 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 34 [2020-10-12 09:47:10,835 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:47:10,836 INFO L225 Difference]: With dead ends: 92 [2020-10-12 09:47:10,836 INFO L226 Difference]: Without dead ends: 60 [2020-10-12 09:47:10,836 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2020-10-12 09:47:10,837 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2020-10-12 09:47:10,840 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 59. [2020-10-12 09:47:10,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2020-10-12 09:47:10,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 70 transitions. [2020-10-12 09:47:10,841 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 70 transitions. Word has length 34 [2020-10-12 09:47:10,842 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:47:10,842 INFO L479 AbstractCegarLoop]: Abstraction has 59 states and 70 transitions. [2020-10-12 09:47:10,842 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-12 09:47:10,842 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 70 transitions. [2020-10-12 09:47:10,843 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-10-12 09:47:10,843 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:47:10,843 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:47:10,844 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-12 09:47:10,844 INFO L427 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:47:10,844 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:47:10,844 INFO L82 PathProgramCache]: Analyzing trace with hash -566354220, now seen corresponding path program 10 times [2020-10-12 09:47:10,844 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:47:10,845 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1663190772] [2020-10-12 09:47:10,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:47:10,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:47:10,863 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:47:10,877 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:47:11,531 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:47:11,531 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 44 [2020-10-12 09:47:11,531 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 09:47:11,532 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 674 [2020-10-12 09:47:11,532 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:47:11,532 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-12 09:47:11,532 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 09:47:11,532 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-12 09:47:11,532 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:47:11,685 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:47:11,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:47:11,688 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:47:11,690 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:47:11,690 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:47:11,690 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:47:11,690 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 09:47:11,690 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:47:11,691 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:47:11,691 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:47:11,691 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:47:11,692 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 09:47:11,696 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 09:47:11,697 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1663190772] [2020-10-12 09:47:11,697 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:47:11,697 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-12 09:47:11,698 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [653619568] [2020-10-12 09:47:11,699 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-12 09:47:11,699 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:47:11,699 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-12 09:47:11,700 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2020-10-12 09:47:11,700 INFO L87 Difference]: Start difference. First operand 59 states and 70 transitions. Second operand 14 states. [2020-10-12 09:47:11,910 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:47:11,911 INFO L93 Difference]: Finished difference Result 94 states and 116 transitions. [2020-10-12 09:47:11,911 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-12 09:47:11,911 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 36 [2020-10-12 09:47:11,912 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:47:11,913 INFO L225 Difference]: With dead ends: 94 [2020-10-12 09:47:11,913 INFO L226 Difference]: Without dead ends: 62 [2020-10-12 09:47:11,914 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2020-10-12 09:47:11,914 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2020-10-12 09:47:11,918 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 61. [2020-10-12 09:47:11,918 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2020-10-12 09:47:11,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 72 transitions. [2020-10-12 09:47:11,919 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 72 transitions. Word has length 36 [2020-10-12 09:47:11,920 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:47:11,920 INFO L479 AbstractCegarLoop]: Abstraction has 61 states and 72 transitions. [2020-10-12 09:47:11,920 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-12 09:47:11,920 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 72 transitions. [2020-10-12 09:47:11,921 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-10-12 09:47:11,921 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:47:11,921 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:47:11,921 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-12 09:47:11,922 INFO L427 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:47:11,922 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:47:11,922 INFO L82 PathProgramCache]: Analyzing trace with hash -175540298, now seen corresponding path program 11 times [2020-10-12 09:47:11,922 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:47:11,923 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [659973951] [2020-10-12 09:47:11,923 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:47:11,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:47:11,947 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:47:11,968 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:47:12,965 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:47:12,965 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 46 [2020-10-12 09:47:12,965 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 09:47:12,966 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1027 [2020-10-12 09:47:12,966 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:47:12,966 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-12 09:47:12,966 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 09:47:12,967 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-10-12 09:47:12,967 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 09:47:13,140 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:47:13,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:47:13,143 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:47:13,145 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:47:13,146 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:47:13,146 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:47:13,146 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-12 09:47:13,147 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:47:13,147 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:47:13,147 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:47:13,148 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:47:13,148 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 09:47:13,153 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 09:47:13,154 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [659973951] [2020-10-12 09:47:13,154 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:47:13,154 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-12 09:47:13,154 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1152773389] [2020-10-12 09:47:13,155 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-12 09:47:13,155 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:47:13,155 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-12 09:47:13,156 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210 [2020-10-12 09:47:13,156 INFO L87 Difference]: Start difference. First operand 61 states and 72 transitions. Second operand 15 states. [2020-10-12 09:47:13,363 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:47:13,363 INFO L93 Difference]: Finished difference Result 96 states and 118 transitions. [2020-10-12 09:47:13,364 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-12 09:47:13,364 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 38 [2020-10-12 09:47:13,364 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:47:13,365 INFO L225 Difference]: With dead ends: 96 [2020-10-12 09:47:13,365 INFO L226 Difference]: Without dead ends: 64 [2020-10-12 09:47:13,366 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210 [2020-10-12 09:47:13,367 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2020-10-12 09:47:13,370 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 63. [2020-10-12 09:47:13,370 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2020-10-12 09:47:13,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 74 transitions. [2020-10-12 09:47:13,371 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 74 transitions. Word has length 38 [2020-10-12 09:47:13,371 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:47:13,371 INFO L479 AbstractCegarLoop]: Abstraction has 63 states and 74 transitions. [2020-10-12 09:47:13,372 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-12 09:47:13,372 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 74 transitions. [2020-10-12 09:47:13,372 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-10-12 09:47:13,372 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:47:13,372 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:47:13,373 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-12 09:47:13,373 INFO L427 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:47:13,373 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:47:13,373 INFO L82 PathProgramCache]: Analyzing trace with hash 1734483992, now seen corresponding path program 12 times [2020-10-12 09:47:13,374 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:47:13,374 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2090109042] [2020-10-12 09:47:13,374 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:47:13,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:47:13,401 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:47:13,417 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:47:14,320 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:47:14,320 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 48 [2020-10-12 09:47:14,321 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 09:47:14,321 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 929 [2020-10-12 09:47:14,321 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:47:14,321 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-12 09:47:14,322 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 09:47:14,322 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-12 09:47:14,322 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:47:14,555 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:47:14,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:47:14,559 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:47:14,563 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:47:14,563 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:47:14,563 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:47:14,564 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-12 09:47:14,564 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:47:14,564 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:47:14,565 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:47:14,565 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:47:14,565 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 09:47:14,570 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 09:47:14,571 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2090109042] [2020-10-12 09:47:14,571 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:47:14,572 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-12 09:47:14,572 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [430615864] [2020-10-12 09:47:14,573 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-12 09:47:14,573 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:47:14,573 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-12 09:47:14,574 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=133, Unknown=0, NotChecked=0, Total=240 [2020-10-12 09:47:14,574 INFO L87 Difference]: Start difference. First operand 63 states and 74 transitions. Second operand 16 states. [2020-10-12 09:47:14,804 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:47:14,804 INFO L93 Difference]: Finished difference Result 98 states and 120 transitions. [2020-10-12 09:47:14,804 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-12 09:47:14,805 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 40 [2020-10-12 09:47:14,805 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:47:14,806 INFO L225 Difference]: With dead ends: 98 [2020-10-12 09:47:14,806 INFO L226 Difference]: Without dead ends: 66 [2020-10-12 09:47:14,806 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=107, Invalid=133, Unknown=0, NotChecked=0, Total=240 [2020-10-12 09:47:14,807 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2020-10-12 09:47:14,810 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 65. [2020-10-12 09:47:14,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2020-10-12 09:47:14,811 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 76 transitions. [2020-10-12 09:47:14,812 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 76 transitions. Word has length 40 [2020-10-12 09:47:14,812 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:47:14,812 INFO L479 AbstractCegarLoop]: Abstraction has 65 states and 76 transitions. [2020-10-12 09:47:14,812 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-12 09:47:14,813 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 76 transitions. [2020-10-12 09:47:14,813 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-10-12 09:47:14,813 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:47:14,814 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:47:14,814 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-12 09:47:14,814 INFO L427 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:47:14,814 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:47:14,815 INFO L82 PathProgramCache]: Analyzing trace with hash -978176006, now seen corresponding path program 13 times [2020-10-12 09:47:14,815 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:47:14,815 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1956688728] [2020-10-12 09:47:14,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:47:14,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:47:14,848 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:47:14,873 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:47:16,343 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:47:16,344 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 50 [2020-10-12 09:47:16,344 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 09:47:16,345 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1508 [2020-10-12 09:47:16,345 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:47:16,345 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-12 09:47:16,346 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 09:47:16,346 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-10-12 09:47:16,346 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 09:47:16,567 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:47:16,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:47:16,571 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:47:16,573 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:47:16,573 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:47:16,573 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:47:16,573 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 09:47:16,573 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:47:16,574 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:47:16,574 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:47:16,574 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:47:16,574 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:47:16,579 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 09:47:16,580 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1956688728] [2020-10-12 09:47:16,580 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:47:16,580 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-12 09:47:16,581 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1473891174] [2020-10-12 09:47:16,582 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-12 09:47:16,582 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:47:16,583 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-12 09:47:16,583 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=150, Unknown=0, NotChecked=0, Total=272 [2020-10-12 09:47:16,583 INFO L87 Difference]: Start difference. First operand 65 states and 76 transitions. Second operand 17 states. [2020-10-12 09:47:16,757 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:47:16,757 INFO L93 Difference]: Finished difference Result 100 states and 122 transitions. [2020-10-12 09:47:16,757 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-12 09:47:16,758 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 42 [2020-10-12 09:47:16,758 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:47:16,759 INFO L225 Difference]: With dead ends: 100 [2020-10-12 09:47:16,759 INFO L226 Difference]: Without dead ends: 68 [2020-10-12 09:47:16,760 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=122, Invalid=150, Unknown=0, NotChecked=0, Total=272 [2020-10-12 09:47:16,762 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2020-10-12 09:47:16,769 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 67. [2020-10-12 09:47:16,770 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2020-10-12 09:47:16,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 78 transitions. [2020-10-12 09:47:16,771 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 78 transitions. Word has length 42 [2020-10-12 09:47:16,771 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:47:16,771 INFO L479 AbstractCegarLoop]: Abstraction has 67 states and 78 transitions. [2020-10-12 09:47:16,771 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-12 09:47:16,772 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 78 transitions. [2020-10-12 09:47:16,772 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2020-10-12 09:47:16,772 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:47:16,773 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:47:16,773 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-12 09:47:16,773 INFO L427 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:47:16,774 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:47:16,774 INFO L82 PathProgramCache]: Analyzing trace with hash -799285412, now seen corresponding path program 14 times [2020-10-12 09:47:16,774 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:47:16,775 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1984084136] [2020-10-12 09:47:16,775 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:47:16,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:47:16,826 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:47:16,851 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:47:18,025 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:47:18,025 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 52 [2020-10-12 09:47:18,025 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 09:47:18,025 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1209 [2020-10-12 09:47:18,026 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:47:18,026 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-12 09:47:18,026 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 09:47:18,026 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-12 09:47:18,026 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:47:18,239 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:47:18,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:47:18,241 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:47:18,243 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:47:18,243 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:47:18,243 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:47:18,243 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 09:47:18,243 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:47:18,244 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:47:18,244 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:47:18,244 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:47:18,245 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 09:47:18,249 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 09:47:18,249 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1984084136] [2020-10-12 09:47:18,251 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:47:18,251 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-12 09:47:18,252 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [605456499] [2020-10-12 09:47:18,252 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-12 09:47:18,252 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:47:18,252 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-12 09:47:18,253 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2020-10-12 09:47:18,253 INFO L87 Difference]: Start difference. First operand 67 states and 78 transitions. Second operand 18 states. [2020-10-12 09:47:18,451 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:47:18,451 INFO L93 Difference]: Finished difference Result 102 states and 124 transitions. [2020-10-12 09:47:18,452 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-12 09:47:18,452 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 44 [2020-10-12 09:47:18,452 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:47:18,453 INFO L225 Difference]: With dead ends: 102 [2020-10-12 09:47:18,453 INFO L226 Difference]: Without dead ends: 70 [2020-10-12 09:47:18,455 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2020-10-12 09:47:18,455 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2020-10-12 09:47:18,461 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 69. [2020-10-12 09:47:18,461 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2020-10-12 09:47:18,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 80 transitions. [2020-10-12 09:47:18,463 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 80 transitions. Word has length 44 [2020-10-12 09:47:18,464 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:47:18,464 INFO L479 AbstractCegarLoop]: Abstraction has 69 states and 80 transitions. [2020-10-12 09:47:18,464 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-12 09:47:18,464 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 80 transitions. [2020-10-12 09:47:18,465 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-10-12 09:47:18,465 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:47:18,465 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:47:18,465 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-12 09:47:18,466 INFO L427 AbstractCegarLoop]: === Iteration 17 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:47:18,466 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:47:18,466 INFO L82 PathProgramCache]: Analyzing trace with hash -684116418, now seen corresponding path program 15 times [2020-10-12 09:47:18,466 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:47:18,467 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [293599524] [2020-10-12 09:47:18,467 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:47:18,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:47:18,498 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:47:18,551 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:47:19,559 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:47:19,559 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 54 [2020-10-12 09:47:19,559 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 09:47:19,560 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1074 [2020-10-12 09:47:19,560 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:47:19,560 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-12 09:47:19,560 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 09:47:19,560 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-12 09:47:19,560 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:47:19,731 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:47:19,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:47:19,734 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:47:19,735 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:47:19,736 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:47:19,736 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:47:19,736 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 09:47:19,736 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:47:19,737 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:47:19,737 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:47:19,737 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:47:19,737 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:47:19,743 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 09:47:19,743 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [293599524] [2020-10-12 09:47:19,743 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:47:19,744 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-10-12 09:47:19,744 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1539517817] [2020-10-12 09:47:19,744 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-12 09:47:19,745 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:47:19,745 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-12 09:47:19,746 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=187, Unknown=0, NotChecked=0, Total=342 [2020-10-12 09:47:19,746 INFO L87 Difference]: Start difference. First operand 69 states and 80 transitions. Second operand 19 states. [2020-10-12 09:47:19,917 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:47:19,917 INFO L93 Difference]: Finished difference Result 104 states and 126 transitions. [2020-10-12 09:47:19,917 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-12 09:47:19,917 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 46 [2020-10-12 09:47:19,918 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:47:19,918 INFO L225 Difference]: With dead ends: 104 [2020-10-12 09:47:19,919 INFO L226 Difference]: Without dead ends: 72 [2020-10-12 09:47:19,919 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=155, Invalid=187, Unknown=0, NotChecked=0, Total=342 [2020-10-12 09:47:19,920 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2020-10-12 09:47:19,925 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 71. [2020-10-12 09:47:19,925 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2020-10-12 09:47:19,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 82 transitions. [2020-10-12 09:47:19,926 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 82 transitions. Word has length 46 [2020-10-12 09:47:19,926 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:47:19,926 INFO L479 AbstractCegarLoop]: Abstraction has 71 states and 82 transitions. [2020-10-12 09:47:19,926 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-12 09:47:19,926 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 82 transitions. [2020-10-12 09:47:19,927 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-10-12 09:47:19,927 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:47:19,927 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:47:19,927 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-12 09:47:19,928 INFO L427 AbstractCegarLoop]: === Iteration 18 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:47:19,928 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:47:19,928 INFO L82 PathProgramCache]: Analyzing trace with hash -1675862880, now seen corresponding path program 16 times [2020-10-12 09:47:19,928 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:47:19,928 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [90900018] [2020-10-12 09:47:19,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:47:19,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:47:19,954 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:47:19,971 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:47:21,196 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:47:21,196 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 56 [2020-10-12 09:47:21,196 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 09:47:21,196 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1251 [2020-10-12 09:47:21,197 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:47:21,197 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-12 09:47:21,197 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 09:47:21,197 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 34 [2020-10-12 09:47:21,197 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:47:21,422 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:47:21,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:47:21,424 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:47:21,425 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:47:21,425 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:47:21,425 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:47:21,426 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 09:47:21,426 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:47:21,426 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:47:21,426 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:47:21,426 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:47:21,427 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:47:21,431 INFO L134 CoverageAnalysis]: Checked inductivity of 256 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 09:47:21,432 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [90900018] [2020-10-12 09:47:21,432 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:47:21,432 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-10-12 09:47:21,437 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2028226745] [2020-10-12 09:47:21,439 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-12 09:47:21,439 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:47:21,440 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-12 09:47:21,441 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=207, Unknown=0, NotChecked=0, Total=380 [2020-10-12 09:47:21,441 INFO L87 Difference]: Start difference. First operand 71 states and 82 transitions. Second operand 20 states. [2020-10-12 09:47:21,654 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:47:21,654 INFO L93 Difference]: Finished difference Result 106 states and 128 transitions. [2020-10-12 09:47:21,655 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-12 09:47:21,655 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 48 [2020-10-12 09:47:21,656 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:47:21,656 INFO L225 Difference]: With dead ends: 106 [2020-10-12 09:47:21,657 INFO L226 Difference]: Without dead ends: 74 [2020-10-12 09:47:21,659 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=173, Invalid=207, Unknown=0, NotChecked=0, Total=380 [2020-10-12 09:47:21,659 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2020-10-12 09:47:21,668 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 73. [2020-10-12 09:47:21,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2020-10-12 09:47:21,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 84 transitions. [2020-10-12 09:47:21,670 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 84 transitions. Word has length 48 [2020-10-12 09:47:21,670 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:47:21,670 INFO L479 AbstractCegarLoop]: Abstraction has 73 states and 84 transitions. [2020-10-12 09:47:21,671 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-12 09:47:21,671 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 84 transitions. [2020-10-12 09:47:21,671 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2020-10-12 09:47:21,672 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:47:21,672 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:47:21,672 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-12 09:47:21,672 INFO L427 AbstractCegarLoop]: === Iteration 19 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:47:21,673 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:47:21,673 INFO L82 PathProgramCache]: Analyzing trace with hash -1261473150, now seen corresponding path program 17 times [2020-10-12 09:47:21,673 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:47:21,674 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1892532219] [2020-10-12 09:47:21,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:47:21,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:47:21,705 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:47:21,727 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:47:23,523 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:47:23,523 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 58 [2020-10-12 09:47:23,524 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 09:47:23,524 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1830 [2020-10-12 09:47:23,524 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:47:23,524 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 19 [2020-10-12 09:47:23,524 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 09:47:23,524 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 36 [2020-10-12 09:47:23,525 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:47:23,774 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:47:23,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:47:23,776 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:47:23,778 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:47:23,778 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:47:23,779 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:47:23,779 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 09:47:23,779 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:47:23,779 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:47:23,780 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:47:23,780 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:47:23,780 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:47:23,785 INFO L134 CoverageAnalysis]: Checked inductivity of 289 backedges. 0 proven. 289 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 09:47:23,786 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1892532219] [2020-10-12 09:47:23,786 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:47:23,786 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-10-12 09:47:23,787 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [378045700] [2020-10-12 09:47:23,789 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-12 09:47:23,790 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:47:23,790 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-12 09:47:23,790 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=192, Invalid=228, Unknown=0, NotChecked=0, Total=420 [2020-10-12 09:47:23,791 INFO L87 Difference]: Start difference. First operand 73 states and 84 transitions. Second operand 21 states. [2020-10-12 09:47:23,958 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:47:23,959 INFO L93 Difference]: Finished difference Result 108 states and 130 transitions. [2020-10-12 09:47:23,959 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-12 09:47:23,959 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 50 [2020-10-12 09:47:23,959 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:47:23,960 INFO L225 Difference]: With dead ends: 108 [2020-10-12 09:47:23,960 INFO L226 Difference]: Without dead ends: 76 [2020-10-12 09:47:23,961 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=192, Invalid=228, Unknown=0, NotChecked=0, Total=420 [2020-10-12 09:47:23,961 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2020-10-12 09:47:23,966 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 75. [2020-10-12 09:47:23,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2020-10-12 09:47:23,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 86 transitions. [2020-10-12 09:47:23,967 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 86 transitions. Word has length 50 [2020-10-12 09:47:23,967 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:47:23,968 INFO L479 AbstractCegarLoop]: Abstraction has 75 states and 86 transitions. [2020-10-12 09:47:23,968 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-12 09:47:23,968 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 86 transitions. [2020-10-12 09:47:23,968 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-10-12 09:47:23,968 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:47:23,968 INFO L422 BasicCegarLoop]: trace histogram [18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:47:23,969 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-12 09:47:23,969 INFO L427 AbstractCegarLoop]: === Iteration 20 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:47:23,969 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:47:23,969 INFO L82 PathProgramCache]: Analyzing trace with hash 1830066148, now seen corresponding path program 18 times [2020-10-12 09:47:23,969 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:47:23,970 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [913966571] [2020-10-12 09:47:23,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:47:23,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:47:23,997 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:47:24,018 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:47:25,380 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:47:25,380 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 60 [2020-10-12 09:47:25,380 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 09:47:25,380 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1392 [2020-10-12 09:47:25,381 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:47:25,381 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-10-12 09:47:25,381 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 09:47:25,381 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 38 [2020-10-12 09:47:25,381 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:47:25,624 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:47:25,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:47:25,626 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:47:25,627 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:47:25,628 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:47:25,628 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:47:25,628 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 09:47:25,628 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:47:25,628 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:47:25,629 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:47:25,629 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:47:25,629 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:47:25,634 INFO L134 CoverageAnalysis]: Checked inductivity of 324 backedges. 0 proven. 324 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 09:47:25,634 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [913966571] [2020-10-12 09:47:25,635 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:47:25,635 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-10-12 09:47:25,635 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2044569945] [2020-10-12 09:47:25,635 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-12 09:47:25,636 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:47:25,636 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-12 09:47:25,636 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=212, Invalid=250, Unknown=0, NotChecked=0, Total=462 [2020-10-12 09:47:25,636 INFO L87 Difference]: Start difference. First operand 75 states and 86 transitions. Second operand 22 states. [2020-10-12 09:47:25,829 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:47:25,829 INFO L93 Difference]: Finished difference Result 110 states and 132 transitions. [2020-10-12 09:47:25,830 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-12 09:47:25,830 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 52 [2020-10-12 09:47:25,830 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:47:25,831 INFO L225 Difference]: With dead ends: 110 [2020-10-12 09:47:25,831 INFO L226 Difference]: Without dead ends: 78 [2020-10-12 09:47:25,832 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=212, Invalid=250, Unknown=0, NotChecked=0, Total=462 [2020-10-12 09:47:25,832 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2020-10-12 09:47:25,835 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 77. [2020-10-12 09:47:25,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2020-10-12 09:47:25,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 88 transitions. [2020-10-12 09:47:25,836 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 88 transitions. Word has length 52 [2020-10-12 09:47:25,836 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:47:25,836 INFO L479 AbstractCegarLoop]: Abstraction has 77 states and 88 transitions. [2020-10-12 09:47:25,837 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-12 09:47:25,837 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 88 transitions. [2020-10-12 09:47:25,837 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-10-12 09:47:25,837 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:47:25,837 INFO L422 BasicCegarLoop]: trace histogram [19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:47:25,838 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-10-12 09:47:25,838 INFO L427 AbstractCegarLoop]: === Iteration 21 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:47:25,838 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:47:25,838 INFO L82 PathProgramCache]: Analyzing trace with hash 681962694, now seen corresponding path program 19 times [2020-10-12 09:47:25,838 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:47:25,839 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [644173999] [2020-10-12 09:47:25,839 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:47:25,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:47:25,861 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:47:25,877 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:47:27,406 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:47:27,406 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 62 [2020-10-12 09:47:27,406 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 09:47:27,406 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1553 [2020-10-12 09:47:27,407 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:47:27,407 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 21 [2020-10-12 09:47:27,407 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 09:47:27,407 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 40 [2020-10-12 09:47:27,407 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:47:27,691 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:47:27,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:47:27,695 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:47:27,696 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:47:27,696 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:47:27,696 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:47:27,696 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 09:47:27,696 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:47:27,697 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:47:27,697 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:47:27,697 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:47:27,697 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:47:27,703 INFO L134 CoverageAnalysis]: Checked inductivity of 361 backedges. 0 proven. 361 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 09:47:27,703 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [644173999] [2020-10-12 09:47:27,704 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:47:27,704 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-10-12 09:47:27,704 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [450059840] [2020-10-12 09:47:27,704 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-12 09:47:27,705 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:47:27,705 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-12 09:47:27,705 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=233, Invalid=273, Unknown=0, NotChecked=0, Total=506 [2020-10-12 09:47:27,706 INFO L87 Difference]: Start difference. First operand 77 states and 88 transitions. Second operand 23 states. [2020-10-12 09:47:27,862 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:47:27,862 INFO L93 Difference]: Finished difference Result 112 states and 134 transitions. [2020-10-12 09:47:27,862 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-12 09:47:27,863 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 54 [2020-10-12 09:47:27,863 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:47:27,864 INFO L225 Difference]: With dead ends: 112 [2020-10-12 09:47:27,864 INFO L226 Difference]: Without dead ends: 80 [2020-10-12 09:47:27,864 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=233, Invalid=273, Unknown=0, NotChecked=0, Total=506 [2020-10-12 09:47:27,865 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2020-10-12 09:47:27,868 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 79. [2020-10-12 09:47:27,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2020-10-12 09:47:27,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 90 transitions. [2020-10-12 09:47:27,869 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 90 transitions. Word has length 54 [2020-10-12 09:47:27,869 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:47:27,869 INFO L479 AbstractCegarLoop]: Abstraction has 79 states and 90 transitions. [2020-10-12 09:47:27,869 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-12 09:47:27,870 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 90 transitions. [2020-10-12 09:47:27,870 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-10-12 09:47:27,870 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:47:27,870 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:47:27,871 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-10-12 09:47:27,871 INFO L427 AbstractCegarLoop]: === Iteration 22 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:47:27,871 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:47:27,871 INFO L82 PathProgramCache]: Analyzing trace with hash 1161138472, now seen corresponding path program 20 times [2020-10-12 09:47:27,872 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:47:27,873 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [125281070] [2020-10-12 09:47:27,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:47:27,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:47:27,901 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:47:27,916 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:47:29,803 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:47:29,809 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 64 [2020-10-12 09:47:29,810 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 09:47:29,810 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1913 [2020-10-12 09:47:29,810 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:47:29,810 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 22 [2020-10-12 09:47:29,810 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 09:47:29,810 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 42 [2020-10-12 09:47:29,811 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:47:30,127 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:47:30,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:47:30,129 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:47:30,130 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:47:30,130 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:47:30,131 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:47:30,131 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 09:47:30,131 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:47:30,131 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:47:30,131 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:47:30,131 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:47:30,132 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:47:30,136 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 0 proven. 400 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 09:47:30,136 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [125281070] [2020-10-12 09:47:30,136 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:47:30,137 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2020-10-12 09:47:30,137 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [659672933] [2020-10-12 09:47:30,137 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-12 09:47:30,137 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:47:30,138 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-12 09:47:30,138 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=255, Invalid=297, Unknown=0, NotChecked=0, Total=552 [2020-10-12 09:47:30,138 INFO L87 Difference]: Start difference. First operand 79 states and 90 transitions. Second operand 24 states. [2020-10-12 09:47:30,332 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:47:30,332 INFO L93 Difference]: Finished difference Result 114 states and 136 transitions. [2020-10-12 09:47:30,333 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-12 09:47:30,333 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 56 [2020-10-12 09:47:30,334 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:47:30,334 INFO L225 Difference]: With dead ends: 114 [2020-10-12 09:47:30,334 INFO L226 Difference]: Without dead ends: 82 [2020-10-12 09:47:30,335 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=255, Invalid=297, Unknown=0, NotChecked=0, Total=552 [2020-10-12 09:47:30,335 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2020-10-12 09:47:30,338 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 81. [2020-10-12 09:47:30,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-10-12 09:47:30,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 92 transitions. [2020-10-12 09:47:30,340 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 92 transitions. Word has length 56 [2020-10-12 09:47:30,340 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:47:30,340 INFO L479 AbstractCegarLoop]: Abstraction has 81 states and 92 transitions. [2020-10-12 09:47:30,340 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-12 09:47:30,340 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 92 transitions. [2020-10-12 09:47:30,341 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-10-12 09:47:30,341 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:47:30,341 INFO L422 BasicCegarLoop]: trace histogram [21, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:47:30,341 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-10-12 09:47:30,341 INFO L427 AbstractCegarLoop]: === Iteration 23 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:47:30,341 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:47:30,342 INFO L82 PathProgramCache]: Analyzing trace with hash 2087560458, now seen corresponding path program 21 times [2020-10-12 09:47:30,342 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:47:30,342 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2074340460] [2020-10-12 09:47:30,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:47:30,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:47:30,364 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:47:30,404 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:47:31,755 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:47:31,755 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 66 [2020-10-12 09:47:31,756 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 09:47:31,756 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1399 [2020-10-12 09:47:31,756 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:47:31,756 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 23 [2020-10-12 09:47:31,757 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 09:47:31,757 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 44 [2020-10-12 09:47:31,757 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 09:47:32,079 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:47:32,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:47:32,081 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:47:32,082 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:47:32,082 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:47:32,082 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:47:32,082 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 09:47:32,083 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:47:32,083 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:47:32,083 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:47:32,083 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:47:32,083 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:47:32,088 INFO L134 CoverageAnalysis]: Checked inductivity of 441 backedges. 0 proven. 441 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 09:47:32,088 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2074340460] [2020-10-12 09:47:32,091 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:47:32,091 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2020-10-12 09:47:32,092 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1313544224] [2020-10-12 09:47:32,093 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-12 09:47:32,093 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:47:32,093 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-12 09:47:32,094 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=278, Invalid=322, Unknown=0, NotChecked=0, Total=600 [2020-10-12 09:47:32,094 INFO L87 Difference]: Start difference. First operand 81 states and 92 transitions. Second operand 25 states. [2020-10-12 09:47:32,245 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:47:32,246 INFO L93 Difference]: Finished difference Result 116 states and 138 transitions. [2020-10-12 09:47:32,246 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-12 09:47:32,246 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 58 [2020-10-12 09:47:32,246 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:47:32,247 INFO L225 Difference]: With dead ends: 116 [2020-10-12 09:47:32,247 INFO L226 Difference]: Without dead ends: 84 [2020-10-12 09:47:32,249 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=278, Invalid=322, Unknown=0, NotChecked=0, Total=600 [2020-10-12 09:47:32,249 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2020-10-12 09:47:32,253 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 83. [2020-10-12 09:47:32,253 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2020-10-12 09:47:32,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 94 transitions. [2020-10-12 09:47:32,255 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 94 transitions. Word has length 58 [2020-10-12 09:47:32,255 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:47:32,255 INFO L479 AbstractCegarLoop]: Abstraction has 83 states and 94 transitions. [2020-10-12 09:47:32,255 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-12 09:47:32,255 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 94 transitions. [2020-10-12 09:47:32,256 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2020-10-12 09:47:32,256 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:47:32,256 INFO L422 BasicCegarLoop]: trace histogram [22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:47:32,256 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-10-12 09:47:32,256 INFO L427 AbstractCegarLoop]: === Iteration 24 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:47:32,257 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:47:32,257 INFO L82 PathProgramCache]: Analyzing trace with hash -974108564, now seen corresponding path program 22 times [2020-10-12 09:47:32,257 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:47:32,257 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1280676811] [2020-10-12 09:47:32,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:47:32,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:47:32,280 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:47:32,335 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:47:33,952 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:47:33,952 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 68 [2020-10-12 09:47:33,952 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 09:47:33,953 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1680 [2020-10-12 09:47:33,953 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:47:33,953 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 24 [2020-10-12 09:47:33,953 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 09:47:33,953 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 46 [2020-10-12 09:47:33,954 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:47:34,284 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:47:34,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:47:34,286 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:47:34,287 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:47:34,287 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:47:34,287 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:47:34,287 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 09:47:34,288 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:47:34,288 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:47:34,288 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:47:34,288 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:47:34,288 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:47:34,293 INFO L134 CoverageAnalysis]: Checked inductivity of 484 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 09:47:34,294 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1280676811] [2020-10-12 09:47:34,294 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:47:34,294 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2020-10-12 09:47:34,294 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1609180127] [2020-10-12 09:47:34,295 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-10-12 09:47:34,295 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:47:34,295 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-10-12 09:47:34,296 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=302, Invalid=348, Unknown=0, NotChecked=0, Total=650 [2020-10-12 09:47:34,296 INFO L87 Difference]: Start difference. First operand 83 states and 94 transitions. Second operand 26 states. [2020-10-12 09:47:34,467 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:47:34,467 INFO L93 Difference]: Finished difference Result 118 states and 140 transitions. [2020-10-12 09:47:34,468 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-12 09:47:34,468 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 60 [2020-10-12 09:47:34,468 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:47:34,469 INFO L225 Difference]: With dead ends: 118 [2020-10-12 09:47:34,469 INFO L226 Difference]: Without dead ends: 86 [2020-10-12 09:47:34,470 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=302, Invalid=348, Unknown=0, NotChecked=0, Total=650 [2020-10-12 09:47:34,470 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2020-10-12 09:47:34,473 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 85. [2020-10-12 09:47:34,473 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2020-10-12 09:47:34,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 96 transitions. [2020-10-12 09:47:34,474 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 96 transitions. Word has length 60 [2020-10-12 09:47:34,474 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:47:34,474 INFO L479 AbstractCegarLoop]: Abstraction has 85 states and 96 transitions. [2020-10-12 09:47:34,474 INFO L480 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-10-12 09:47:34,474 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 96 transitions. [2020-10-12 09:47:34,475 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2020-10-12 09:47:34,475 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:47:34,475 INFO L422 BasicCegarLoop]: trace histogram [23, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:47:34,475 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-10-12 09:47:34,475 INFO L427 AbstractCegarLoop]: === Iteration 25 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:47:34,475 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:47:34,476 INFO L82 PathProgramCache]: Analyzing trace with hash -1185440946, now seen corresponding path program 23 times [2020-10-12 09:47:34,476 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:47:34,476 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1198515892] [2020-10-12 09:47:34,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:47:34,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:47:34,501 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:47:34,545 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:47:35,854 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:47:35,854 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 70 [2020-10-12 09:47:35,855 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 09:47:35,855 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1363 [2020-10-12 09:47:35,855 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:47:35,855 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 25 [2020-10-12 09:47:35,856 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 09:47:35,856 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 48 [2020-10-12 09:47:35,856 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:47:36,196 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:47:36,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:47:36,198 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:47:36,199 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:47:36,199 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:47:36,199 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:47:36,199 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 09:47:36,200 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:47:36,200 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:47:36,200 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:47:36,200 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:47:36,200 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:47:36,205 INFO L134 CoverageAnalysis]: Checked inductivity of 529 backedges. 0 proven. 529 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 09:47:36,206 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1198515892] [2020-10-12 09:47:36,206 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:47:36,206 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2020-10-12 09:47:36,206 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1552462102] [2020-10-12 09:47:36,207 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-10-12 09:47:36,207 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:47:36,207 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-10-12 09:47:36,208 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=327, Invalid=375, Unknown=0, NotChecked=0, Total=702 [2020-10-12 09:47:36,208 INFO L87 Difference]: Start difference. First operand 85 states and 96 transitions. Second operand 27 states. [2020-10-12 09:47:36,418 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:47:36,419 INFO L93 Difference]: Finished difference Result 120 states and 142 transitions. [2020-10-12 09:47:36,419 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-12 09:47:36,419 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 62 [2020-10-12 09:47:36,420 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:47:36,421 INFO L225 Difference]: With dead ends: 120 [2020-10-12 09:47:36,421 INFO L226 Difference]: Without dead ends: 88 [2020-10-12 09:47:36,422 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=327, Invalid=375, Unknown=0, NotChecked=0, Total=702 [2020-10-12 09:47:36,423 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2020-10-12 09:47:36,426 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 87. [2020-10-12 09:47:36,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2020-10-12 09:47:36,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 98 transitions. [2020-10-12 09:47:36,428 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 98 transitions. Word has length 62 [2020-10-12 09:47:36,428 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:47:36,428 INFO L479 AbstractCegarLoop]: Abstraction has 87 states and 98 transitions. [2020-10-12 09:47:36,428 INFO L480 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-10-12 09:47:36,429 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 98 transitions. [2020-10-12 09:47:36,429 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2020-10-12 09:47:36,429 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:47:36,430 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:47:36,430 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-10-12 09:47:36,430 INFO L427 AbstractCegarLoop]: === Iteration 26 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:47:36,430 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:47:36,431 INFO L82 PathProgramCache]: Analyzing trace with hash 1882570160, now seen corresponding path program 24 times [2020-10-12 09:47:36,431 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:47:36,431 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1367649486] [2020-10-12 09:47:36,431 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:47:36,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:47:36,460 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:47:36,483 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:47:37,959 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:47:37,959 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 72 [2020-10-12 09:47:37,959 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 09:47:37,959 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1510 [2020-10-12 09:47:37,959 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:47:37,959 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 26 [2020-10-12 09:47:37,959 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 09:47:37,960 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 50 [2020-10-12 09:47:37,960 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:47:38,469 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:47:38,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:47:38,472 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:47:38,473 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:47:38,473 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:47:38,473 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:47:38,474 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 09:47:38,474 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:47:38,474 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:47:38,475 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:47:38,475 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:47:38,475 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 09:47:38,485 INFO L134 CoverageAnalysis]: Checked inductivity of 576 backedges. 0 proven. 576 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 09:47:38,486 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1367649486] [2020-10-12 09:47:38,486 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:47:38,486 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2020-10-12 09:47:38,486 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1831177679] [2020-10-12 09:47:38,487 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-10-12 09:47:38,488 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:47:38,488 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-10-12 09:47:38,489 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=353, Invalid=403, Unknown=0, NotChecked=0, Total=756 [2020-10-12 09:47:38,489 INFO L87 Difference]: Start difference. First operand 87 states and 98 transitions. Second operand 28 states. [2020-10-12 09:47:38,780 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:47:38,780 INFO L93 Difference]: Finished difference Result 122 states and 144 transitions. [2020-10-12 09:47:38,781 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-12 09:47:38,781 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 64 [2020-10-12 09:47:38,781 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:47:38,782 INFO L225 Difference]: With dead ends: 122 [2020-10-12 09:47:38,782 INFO L226 Difference]: Without dead ends: 90 [2020-10-12 09:47:38,783 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=353, Invalid=403, Unknown=0, NotChecked=0, Total=756 [2020-10-12 09:47:38,784 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2020-10-12 09:47:38,788 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 89. [2020-10-12 09:47:38,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2020-10-12 09:47:38,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 100 transitions. [2020-10-12 09:47:38,790 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 100 transitions. Word has length 64 [2020-10-12 09:47:38,790 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:47:38,790 INFO L479 AbstractCegarLoop]: Abstraction has 89 states and 100 transitions. [2020-10-12 09:47:38,790 INFO L480 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-10-12 09:47:38,791 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 100 transitions. [2020-10-12 09:47:38,791 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-10-12 09:47:38,791 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:47:38,791 INFO L422 BasicCegarLoop]: trace histogram [25, 25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:47:38,791 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-10-12 09:47:38,792 INFO L427 AbstractCegarLoop]: === Iteration 27 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:47:38,793 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:47:38,793 INFO L82 PathProgramCache]: Analyzing trace with hash -401289326, now seen corresponding path program 25 times [2020-10-12 09:47:38,793 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:47:38,793 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [471000658] [2020-10-12 09:47:38,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:47:38,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:47:38,826 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:47:38,843 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:47:40,203 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:47:40,204 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 74 [2020-10-12 09:47:40,204 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 09:47:40,204 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1387 [2020-10-12 09:47:40,204 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:47:40,204 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 27 [2020-10-12 09:47:40,204 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 09:47:40,204 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 52 [2020-10-12 09:47:40,205 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:47:40,599 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:47:40,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:47:40,601 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:47:40,602 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:47:40,602 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:47:40,602 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:47:40,602 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 09:47:40,602 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:47:40,603 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:47:40,603 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:47:40,603 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:47:40,603 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:47:40,609 INFO L134 CoverageAnalysis]: Checked inductivity of 625 backedges. 0 proven. 625 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 09:47:40,609 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [471000658] [2020-10-12 09:47:40,610 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:47:40,610 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29] total 29 [2020-10-12 09:47:40,610 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [294924344] [2020-10-12 09:47:40,611 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-10-12 09:47:40,612 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:47:40,612 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-10-12 09:47:40,612 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=380, Invalid=432, Unknown=0, NotChecked=0, Total=812 [2020-10-12 09:47:40,613 INFO L87 Difference]: Start difference. First operand 89 states and 100 transitions. Second operand 29 states. [2020-10-12 09:47:40,858 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:47:40,858 INFO L93 Difference]: Finished difference Result 124 states and 146 transitions. [2020-10-12 09:47:40,858 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-12 09:47:40,859 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 66 [2020-10-12 09:47:40,859 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:47:40,860 INFO L225 Difference]: With dead ends: 124 [2020-10-12 09:47:40,860 INFO L226 Difference]: Without dead ends: 92 [2020-10-12 09:47:40,861 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=380, Invalid=432, Unknown=0, NotChecked=0, Total=812 [2020-10-12 09:47:40,861 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2020-10-12 09:47:40,865 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 91. [2020-10-12 09:47:40,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2020-10-12 09:47:40,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 102 transitions. [2020-10-12 09:47:40,867 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 102 transitions. Word has length 66 [2020-10-12 09:47:40,867 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:47:40,867 INFO L479 AbstractCegarLoop]: Abstraction has 91 states and 102 transitions. [2020-10-12 09:47:40,867 INFO L480 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-10-12 09:47:40,867 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 102 transitions. [2020-10-12 09:47:40,868 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2020-10-12 09:47:40,868 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:47:40,868 INFO L422 BasicCegarLoop]: trace histogram [26, 26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:47:40,868 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-10-12 09:47:40,868 INFO L427 AbstractCegarLoop]: === Iteration 28 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:47:40,869 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:47:40,869 INFO L82 PathProgramCache]: Analyzing trace with hash -461967116, now seen corresponding path program 26 times [2020-10-12 09:47:40,869 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:47:40,869 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [720538826] [2020-10-12 09:47:40,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:47:40,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:47:40,894 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:47:40,911 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:47:42,369 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:47:42,369 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 76 [2020-10-12 09:47:42,369 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 09:47:42,370 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1484 [2020-10-12 09:47:42,370 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:47:42,370 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 28 [2020-10-12 09:47:42,370 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 09:47:42,370 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 54 [2020-10-12 09:47:42,370 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:47:42,816 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:47:42,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:47:42,819 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:47:42,820 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:47:42,820 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:47:42,821 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:47:42,821 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 09:47:42,821 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:47:42,821 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:47:42,821 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:47:42,821 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:47:42,822 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:47:42,827 INFO L134 CoverageAnalysis]: Checked inductivity of 676 backedges. 0 proven. 676 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 09:47:42,828 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [720538826] [2020-10-12 09:47:42,828 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:47:42,828 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30] total 30 [2020-10-12 09:47:42,828 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1888008003] [2020-10-12 09:47:42,829 INFO L459 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-10-12 09:47:42,829 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:47:42,829 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-10-12 09:47:42,830 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=408, Invalid=462, Unknown=0, NotChecked=0, Total=870 [2020-10-12 09:47:42,830 INFO L87 Difference]: Start difference. First operand 91 states and 102 transitions. Second operand 30 states. [2020-10-12 09:47:43,050 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:47:43,051 INFO L93 Difference]: Finished difference Result 126 states and 148 transitions. [2020-10-12 09:47:43,051 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-10-12 09:47:43,051 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 68 [2020-10-12 09:47:43,052 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:47:43,053 INFO L225 Difference]: With dead ends: 126 [2020-10-12 09:47:43,053 INFO L226 Difference]: Without dead ends: 94 [2020-10-12 09:47:43,056 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=408, Invalid=462, Unknown=0, NotChecked=0, Total=870 [2020-10-12 09:47:43,056 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2020-10-12 09:47:43,060 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 93. [2020-10-12 09:47:43,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2020-10-12 09:47:43,061 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 104 transitions. [2020-10-12 09:47:43,061 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 104 transitions. Word has length 68 [2020-10-12 09:47:43,062 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:47:43,062 INFO L479 AbstractCegarLoop]: Abstraction has 93 states and 104 transitions. [2020-10-12 09:47:43,062 INFO L480 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-10-12 09:47:43,062 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 104 transitions. [2020-10-12 09:47:43,062 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2020-10-12 09:47:43,062 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:47:43,063 INFO L422 BasicCegarLoop]: trace histogram [27, 27, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:47:43,063 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2020-10-12 09:47:43,063 INFO L427 AbstractCegarLoop]: === Iteration 29 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:47:43,063 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:47:43,063 INFO L82 PathProgramCache]: Analyzing trace with hash 1356218838, now seen corresponding path program 27 times [2020-10-12 09:47:43,064 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:47:43,064 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [709164247] [2020-10-12 09:47:43,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:47:43,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:47:43,087 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:47:43,107 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:47:44,637 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:47:44,638 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 78 [2020-10-12 09:47:44,638 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 09:47:44,638 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1559 [2020-10-12 09:47:44,638 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:47:44,638 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 29 [2020-10-12 09:47:44,638 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 09:47:44,638 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 56 [2020-10-12 09:47:44,638 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:47:45,146 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:47:45,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:47:45,148 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:47:45,149 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:47:45,149 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:47:45,149 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:47:45,149 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 09:47:45,150 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:47:45,150 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:47:45,150 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:47:45,150 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:47:45,150 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:47:45,157 INFO L134 CoverageAnalysis]: Checked inductivity of 729 backedges. 0 proven. 729 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 09:47:45,157 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [709164247] [2020-10-12 09:47:45,158 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:47:45,158 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31] total 31 [2020-10-12 09:47:45,158 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [83032478] [2020-10-12 09:47:45,158 INFO L459 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-10-12 09:47:45,159 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:47:45,159 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-10-12 09:47:45,159 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=437, Invalid=493, Unknown=0, NotChecked=0, Total=930 [2020-10-12 09:47:45,160 INFO L87 Difference]: Start difference. First operand 93 states and 104 transitions. Second operand 31 states. [2020-10-12 09:47:45,393 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:47:45,393 INFO L93 Difference]: Finished difference Result 128 states and 150 transitions. [2020-10-12 09:47:45,394 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-12 09:47:45,394 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 70 [2020-10-12 09:47:45,394 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:47:45,395 INFO L225 Difference]: With dead ends: 128 [2020-10-12 09:47:45,395 INFO L226 Difference]: Without dead ends: 96 [2020-10-12 09:47:45,396 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=437, Invalid=493, Unknown=0, NotChecked=0, Total=930 [2020-10-12 09:47:45,396 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2020-10-12 09:47:45,399 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 95. [2020-10-12 09:47:45,400 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 95 states. [2020-10-12 09:47:45,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 106 transitions. [2020-10-12 09:47:45,400 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 106 transitions. Word has length 70 [2020-10-12 09:47:45,401 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:47:45,401 INFO L479 AbstractCegarLoop]: Abstraction has 95 states and 106 transitions. [2020-10-12 09:47:45,401 INFO L480 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-10-12 09:47:45,401 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 106 transitions. [2020-10-12 09:47:45,402 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2020-10-12 09:47:45,402 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:47:45,402 INFO L422 BasicCegarLoop]: trace histogram [28, 28, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:47:45,402 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2020-10-12 09:47:45,402 INFO L427 AbstractCegarLoop]: === Iteration 30 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:47:45,402 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:47:45,402 INFO L82 PathProgramCache]: Analyzing trace with hash 581231160, now seen corresponding path program 28 times [2020-10-12 09:47:45,403 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:47:45,403 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1247759263] [2020-10-12 09:47:45,403 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:47:45,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:47:45,428 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:47:45,484 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:47:46,986 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:47:46,987 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 80 [2020-10-12 09:47:46,987 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 09:47:46,987 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1568 [2020-10-12 09:47:46,987 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:47:46,987 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 30 [2020-10-12 09:47:46,987 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 09:47:46,987 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 58 [2020-10-12 09:47:46,988 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:47:47,501 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:47:47,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:47:47,503 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:47:47,505 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:47:47,505 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:47:47,505 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:47:47,505 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 09:47:47,505 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:47:47,505 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:47:47,505 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:47:47,506 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:47:47,506 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:47:47,512 INFO L134 CoverageAnalysis]: Checked inductivity of 784 backedges. 0 proven. 784 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 09:47:47,512 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1247759263] [2020-10-12 09:47:47,513 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:47:47,513 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32] total 32 [2020-10-12 09:47:47,513 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1230147258] [2020-10-12 09:47:47,513 INFO L459 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-10-12 09:47:47,514 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:47:47,514 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-10-12 09:47:47,515 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=467, Invalid=525, Unknown=0, NotChecked=0, Total=992 [2020-10-12 09:47:47,515 INFO L87 Difference]: Start difference. First operand 95 states and 106 transitions. Second operand 32 states. [2020-10-12 09:47:47,784 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:47:47,784 INFO L93 Difference]: Finished difference Result 130 states and 152 transitions. [2020-10-12 09:47:47,785 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-10-12 09:47:47,785 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 72 [2020-10-12 09:47:47,785 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:47:47,787 INFO L225 Difference]: With dead ends: 130 [2020-10-12 09:47:47,787 INFO L226 Difference]: Without dead ends: 98 [2020-10-12 09:47:47,788 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=467, Invalid=525, Unknown=0, NotChecked=0, Total=992 [2020-10-12 09:47:47,788 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2020-10-12 09:47:47,793 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 97. [2020-10-12 09:47:47,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2020-10-12 09:47:47,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 108 transitions. [2020-10-12 09:47:47,794 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 108 transitions. Word has length 72 [2020-10-12 09:47:47,794 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:47:47,794 INFO L479 AbstractCegarLoop]: Abstraction has 97 states and 108 transitions. [2020-10-12 09:47:47,794 INFO L480 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-10-12 09:47:47,795 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 108 transitions. [2020-10-12 09:47:47,795 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2020-10-12 09:47:47,795 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:47:47,795 INFO L422 BasicCegarLoop]: trace histogram [29, 29, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:47:47,796 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2020-10-12 09:47:47,796 INFO L427 AbstractCegarLoop]: === Iteration 31 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:47:47,796 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:47:47,796 INFO L82 PathProgramCache]: Analyzing trace with hash -1152585190, now seen corresponding path program 29 times [2020-10-12 09:47:47,796 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:47:47,797 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [343908484] [2020-10-12 09:47:47,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:47:47,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:47:47,824 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:47:47,845 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:47:49,652 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:47:49,652 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 82 [2020-10-12 09:47:49,652 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 09:47:49,652 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1838 [2020-10-12 09:47:49,652 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:47:49,652 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 31 [2020-10-12 09:47:49,652 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 09:47:49,653 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 60 [2020-10-12 09:47:49,653 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:47:50,131 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:47:50,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:47:50,133 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:47:50,134 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:47:50,134 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:47:50,134 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:47:50,135 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 09:47:50,135 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:47:50,135 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:47:50,135 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:47:50,135 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:47:50,135 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:47:50,154 INFO L134 CoverageAnalysis]: Checked inductivity of 841 backedges. 0 proven. 841 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 09:47:50,155 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [343908484] [2020-10-12 09:47:50,155 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:47:50,155 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33] total 33 [2020-10-12 09:47:50,155 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [151270867] [2020-10-12 09:47:50,156 INFO L459 AbstractCegarLoop]: Interpolant automaton has 33 states [2020-10-12 09:47:50,156 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:47:50,156 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2020-10-12 09:47:50,157 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=498, Invalid=558, Unknown=0, NotChecked=0, Total=1056 [2020-10-12 09:47:50,157 INFO L87 Difference]: Start difference. First operand 97 states and 108 transitions. Second operand 33 states. [2020-10-12 09:47:50,357 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:47:50,357 INFO L93 Difference]: Finished difference Result 132 states and 154 transitions. [2020-10-12 09:47:50,359 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-10-12 09:47:50,360 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 74 [2020-10-12 09:47:50,360 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:47:50,361 INFO L225 Difference]: With dead ends: 132 [2020-10-12 09:47:50,361 INFO L226 Difference]: Without dead ends: 100 [2020-10-12 09:47:50,362 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=498, Invalid=558, Unknown=0, NotChecked=0, Total=1056 [2020-10-12 09:47:50,362 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2020-10-12 09:47:50,366 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 99. [2020-10-12 09:47:50,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2020-10-12 09:47:50,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 110 transitions. [2020-10-12 09:47:50,367 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 110 transitions. Word has length 74 [2020-10-12 09:47:50,368 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:47:50,368 INFO L479 AbstractCegarLoop]: Abstraction has 99 states and 110 transitions. [2020-10-12 09:47:50,368 INFO L480 AbstractCegarLoop]: Interpolant automaton has 33 states. [2020-10-12 09:47:50,368 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 110 transitions. [2020-10-12 09:47:50,369 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2020-10-12 09:47:50,369 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:47:50,369 INFO L422 BasicCegarLoop]: trace histogram [30, 30, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:47:50,369 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2020-10-12 09:47:50,369 INFO L427 AbstractCegarLoop]: === Iteration 32 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:47:50,369 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:47:50,370 INFO L82 PathProgramCache]: Analyzing trace with hash -902786692, now seen corresponding path program 30 times [2020-10-12 09:47:50,370 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:47:50,370 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1737609346] [2020-10-12 09:47:50,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:47:50,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:47:50,399 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:47:50,412 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:47:52,480 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:47:52,480 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 84 [2020-10-12 09:47:52,480 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 09:47:52,481 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2093 [2020-10-12 09:47:52,481 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:47:52,481 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 32 [2020-10-12 09:47:52,481 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 09:47:52,481 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 62 [2020-10-12 09:47:52,481 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:47:53,069 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:47:53,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:47:53,072 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:47:53,073 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:47:53,073 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:47:53,073 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:47:53,074 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 09:47:53,074 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:47:53,074 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:47:53,074 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:47:53,074 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:47:53,074 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:47:53,080 INFO L134 CoverageAnalysis]: Checked inductivity of 900 backedges. 0 proven. 900 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 09:47:53,081 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1737609346] [2020-10-12 09:47:53,081 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:47:53,081 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34] total 34 [2020-10-12 09:47:53,081 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2009939029] [2020-10-12 09:47:53,082 INFO L459 AbstractCegarLoop]: Interpolant automaton has 34 states [2020-10-12 09:47:53,082 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:47:53,082 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2020-10-12 09:47:53,083 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=530, Invalid=592, Unknown=0, NotChecked=0, Total=1122 [2020-10-12 09:47:53,083 INFO L87 Difference]: Start difference. First operand 99 states and 110 transitions. Second operand 34 states. [2020-10-12 09:47:53,374 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:47:53,375 INFO L93 Difference]: Finished difference Result 134 states and 156 transitions. [2020-10-12 09:47:53,375 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-10-12 09:47:53,375 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 76 [2020-10-12 09:47:53,376 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:47:53,377 INFO L225 Difference]: With dead ends: 134 [2020-10-12 09:47:53,377 INFO L226 Difference]: Without dead ends: 102 [2020-10-12 09:47:53,378 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=530, Invalid=592, Unknown=0, NotChecked=0, Total=1122 [2020-10-12 09:47:53,379 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2020-10-12 09:47:53,382 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 101. [2020-10-12 09:47:53,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2020-10-12 09:47:53,383 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 112 transitions. [2020-10-12 09:47:53,383 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 112 transitions. Word has length 76 [2020-10-12 09:47:53,384 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:47:53,384 INFO L479 AbstractCegarLoop]: Abstraction has 101 states and 112 transitions. [2020-10-12 09:47:53,384 INFO L480 AbstractCegarLoop]: Interpolant automaton has 34 states. [2020-10-12 09:47:53,384 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 112 transitions. [2020-10-12 09:47:53,384 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2020-10-12 09:47:53,385 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:47:53,385 INFO L422 BasicCegarLoop]: trace histogram [31, 31, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:47:53,385 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2020-10-12 09:47:53,385 INFO L427 AbstractCegarLoop]: === Iteration 33 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:47:53,385 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:47:53,385 INFO L82 PathProgramCache]: Analyzing trace with hash -1364598690, now seen corresponding path program 31 times [2020-10-12 09:47:53,386 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:47:53,386 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2109733014] [2020-10-12 09:47:53,386 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:47:53,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:47:53,414 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:47:53,432 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:47:55,563 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:47:55,563 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 86 [2020-10-12 09:47:55,563 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 09:47:55,563 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2160 [2020-10-12 09:47:55,563 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:47:55,564 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 33 [2020-10-12 09:47:55,564 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 09:47:55,564 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 64 [2020-10-12 09:47:55,564 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:47:56,166 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:47:56,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:47:56,168 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:47:56,170 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:47:56,170 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:47:56,170 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:47:56,170 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 09:47:56,171 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:47:56,171 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:47:56,171 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:47:56,171 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:47:56,171 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:47:56,177 INFO L134 CoverageAnalysis]: Checked inductivity of 961 backedges. 0 proven. 961 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 09:47:56,177 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2109733014] [2020-10-12 09:47:56,177 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:47:56,177 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35] total 35 [2020-10-12 09:47:56,177 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [866788116] [2020-10-12 09:47:56,178 INFO L459 AbstractCegarLoop]: Interpolant automaton has 35 states [2020-10-12 09:47:56,178 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:47:56,178 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2020-10-12 09:47:56,178 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=563, Invalid=627, Unknown=0, NotChecked=0, Total=1190 [2020-10-12 09:47:56,179 INFO L87 Difference]: Start difference. First operand 101 states and 112 transitions. Second operand 35 states. [2020-10-12 09:47:56,466 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:47:56,466 INFO L93 Difference]: Finished difference Result 136 states and 158 transitions. [2020-10-12 09:47:56,467 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-10-12 09:47:56,467 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 78 [2020-10-12 09:47:56,467 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:47:56,468 INFO L225 Difference]: With dead ends: 136 [2020-10-12 09:47:56,468 INFO L226 Difference]: Without dead ends: 104 [2020-10-12 09:47:56,469 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=563, Invalid=627, Unknown=0, NotChecked=0, Total=1190 [2020-10-12 09:47:56,469 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2020-10-12 09:47:56,476 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 103. [2020-10-12 09:47:56,477 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 103 states. [2020-10-12 09:47:56,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 114 transitions. [2020-10-12 09:47:56,479 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 114 transitions. Word has length 78 [2020-10-12 09:47:56,479 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:47:56,479 INFO L479 AbstractCegarLoop]: Abstraction has 103 states and 114 transitions. [2020-10-12 09:47:56,479 INFO L480 AbstractCegarLoop]: Interpolant automaton has 35 states. [2020-10-12 09:47:56,479 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 114 transitions. [2020-10-12 09:47:56,480 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2020-10-12 09:47:56,480 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:47:56,482 INFO L422 BasicCegarLoop]: trace histogram [32, 32, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:47:56,482 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2020-10-12 09:47:56,482 INFO L427 AbstractCegarLoop]: === Iteration 34 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:47:56,482 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:47:56,483 INFO L82 PathProgramCache]: Analyzing trace with hash 1510670016, now seen corresponding path program 32 times [2020-10-12 09:47:56,483 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:47:56,483 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [389770067] [2020-10-12 09:47:56,483 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:47:56,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:47:56,508 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:47:56,522 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:47:58,802 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:47:58,802 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 88 [2020-10-12 09:47:58,802 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 09:47:58,802 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2303 [2020-10-12 09:47:58,803 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:47:58,803 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 34 [2020-10-12 09:47:58,803 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 09:47:58,803 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 66 [2020-10-12 09:47:58,803 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:47:59,423 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:47:59,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:47:59,424 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:47:59,425 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:47:59,425 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:47:59,426 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:47:59,426 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 09:47:59,426 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:47:59,426 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:47:59,426 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:47:59,426 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:47:59,426 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:47:59,432 INFO L134 CoverageAnalysis]: Checked inductivity of 1024 backedges. 0 proven. 1024 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 09:47:59,432 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [389770067] [2020-10-12 09:47:59,432 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:47:59,433 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36] total 36 [2020-10-12 09:47:59,433 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [615088541] [2020-10-12 09:47:59,433 INFO L459 AbstractCegarLoop]: Interpolant automaton has 36 states [2020-10-12 09:47:59,433 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:47:59,434 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2020-10-12 09:47:59,434 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=597, Invalid=663, Unknown=0, NotChecked=0, Total=1260 [2020-10-12 09:47:59,434 INFO L87 Difference]: Start difference. First operand 103 states and 114 transitions. Second operand 36 states. [2020-10-12 09:47:59,683 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:47:59,683 INFO L93 Difference]: Finished difference Result 138 states and 160 transitions. [2020-10-12 09:47:59,684 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-10-12 09:47:59,684 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 80 [2020-10-12 09:47:59,684 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:47:59,685 INFO L225 Difference]: With dead ends: 138 [2020-10-12 09:47:59,685 INFO L226 Difference]: Without dead ends: 106 [2020-10-12 09:47:59,688 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=597, Invalid=663, Unknown=0, NotChecked=0, Total=1260 [2020-10-12 09:47:59,688 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2020-10-12 09:47:59,693 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 105. [2020-10-12 09:47:59,694 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 105 states. [2020-10-12 09:47:59,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 116 transitions. [2020-10-12 09:47:59,695 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 116 transitions. Word has length 80 [2020-10-12 09:47:59,695 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:47:59,695 INFO L479 AbstractCegarLoop]: Abstraction has 105 states and 116 transitions. [2020-10-12 09:47:59,695 INFO L480 AbstractCegarLoop]: Interpolant automaton has 36 states. [2020-10-12 09:47:59,695 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 116 transitions. [2020-10-12 09:47:59,696 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2020-10-12 09:47:59,696 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:47:59,696 INFO L422 BasicCegarLoop]: trace histogram [33, 33, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:47:59,696 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2020-10-12 09:47:59,696 INFO L427 AbstractCegarLoop]: === Iteration 35 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:47:59,697 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:47:59,697 INFO L82 PathProgramCache]: Analyzing trace with hash -1315042142, now seen corresponding path program 33 times [2020-10-12 09:47:59,697 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:47:59,697 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1194037562] [2020-10-12 09:47:59,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:47:59,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:47:59,720 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:47:59,734 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:48:02,274 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:48:02,275 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 90 [2020-10-12 09:48:02,275 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 09:48:02,275 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2561 [2020-10-12 09:48:02,275 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:48:02,275 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 35 [2020-10-12 09:48:02,275 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 09:48:02,275 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 68 [2020-10-12 09:48:02,275 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:48:02,947 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:48:02,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:48:02,949 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:48:02,950 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:48:02,950 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:48:02,950 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:48:02,950 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 09:48:02,950 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:48:02,950 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:48:02,950 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:48:02,951 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:48:02,951 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:48:02,956 INFO L134 CoverageAnalysis]: Checked inductivity of 1089 backedges. 0 proven. 1089 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 09:48:02,956 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1194037562] [2020-10-12 09:48:02,956 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:48:02,957 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37] total 37 [2020-10-12 09:48:02,957 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [968225430] [2020-10-12 09:48:02,957 INFO L459 AbstractCegarLoop]: Interpolant automaton has 37 states [2020-10-12 09:48:02,957 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:48:02,958 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2020-10-12 09:48:02,958 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=632, Invalid=700, Unknown=0, NotChecked=0, Total=1332 [2020-10-12 09:48:02,958 INFO L87 Difference]: Start difference. First operand 105 states and 116 transitions. Second operand 37 states. [2020-10-12 09:48:03,275 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:48:03,275 INFO L93 Difference]: Finished difference Result 140 states and 162 transitions. [2020-10-12 09:48:03,276 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-10-12 09:48:03,276 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 82 [2020-10-12 09:48:03,276 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:48:03,277 INFO L225 Difference]: With dead ends: 140 [2020-10-12 09:48:03,278 INFO L226 Difference]: Without dead ends: 108 [2020-10-12 09:48:03,279 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=632, Invalid=700, Unknown=0, NotChecked=0, Total=1332 [2020-10-12 09:48:03,279 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2020-10-12 09:48:03,282 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 107. [2020-10-12 09:48:03,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 107 states. [2020-10-12 09:48:03,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 118 transitions. [2020-10-12 09:48:03,283 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 118 transitions. Word has length 82 [2020-10-12 09:48:03,283 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:48:03,283 INFO L479 AbstractCegarLoop]: Abstraction has 107 states and 118 transitions. [2020-10-12 09:48:03,283 INFO L480 AbstractCegarLoop]: Interpolant automaton has 37 states. [2020-10-12 09:48:03,284 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 118 transitions. [2020-10-12 09:48:03,284 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2020-10-12 09:48:03,285 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:48:03,285 INFO L422 BasicCegarLoop]: trace histogram [34, 34, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:48:03,285 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2020-10-12 09:48:03,285 INFO L427 AbstractCegarLoop]: === Iteration 36 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:48:03,285 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:48:03,286 INFO L82 PathProgramCache]: Analyzing trace with hash 1889872388, now seen corresponding path program 34 times [2020-10-12 09:48:03,286 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:48:03,286 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1918397538] [2020-10-12 09:48:03,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:48:03,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:48:03,315 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:48:03,330 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:48:06,060 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:48:06,061 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 92 [2020-10-12 09:48:06,061 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 09:48:06,061 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2757 [2020-10-12 09:48:06,061 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:48:06,061 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 36 [2020-10-12 09:48:06,061 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 09:48:06,061 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 70 [2020-10-12 09:48:06,062 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:48:06,783 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:48:06,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:48:06,785 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:48:06,786 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:48:06,787 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:48:06,787 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:48:06,787 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 09:48:06,787 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:48:06,787 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:48:06,787 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:48:06,787 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:48:06,787 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:48:06,793 INFO L134 CoverageAnalysis]: Checked inductivity of 1156 backedges. 0 proven. 1156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 09:48:06,793 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1918397538] [2020-10-12 09:48:06,793 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:48:06,794 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38] total 38 [2020-10-12 09:48:06,794 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [212744778] [2020-10-12 09:48:06,794 INFO L459 AbstractCegarLoop]: Interpolant automaton has 38 states [2020-10-12 09:48:06,794 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:48:06,795 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2020-10-12 09:48:06,795 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=668, Invalid=738, Unknown=0, NotChecked=0, Total=1406 [2020-10-12 09:48:06,795 INFO L87 Difference]: Start difference. First operand 107 states and 118 transitions. Second operand 38 states. [2020-10-12 09:48:07,009 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:48:07,009 INFO L93 Difference]: Finished difference Result 142 states and 164 transitions. [2020-10-12 09:48:07,010 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-10-12 09:48:07,010 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 84 [2020-10-12 09:48:07,010 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:48:07,011 INFO L225 Difference]: With dead ends: 142 [2020-10-12 09:48:07,011 INFO L226 Difference]: Without dead ends: 110 [2020-10-12 09:48:07,013 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=668, Invalid=738, Unknown=0, NotChecked=0, Total=1406 [2020-10-12 09:48:07,013 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2020-10-12 09:48:07,017 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 109. [2020-10-12 09:48:07,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 109 states. [2020-10-12 09:48:07,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 120 transitions. [2020-10-12 09:48:07,018 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 120 transitions. Word has length 84 [2020-10-12 09:48:07,018 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:48:07,018 INFO L479 AbstractCegarLoop]: Abstraction has 109 states and 120 transitions. [2020-10-12 09:48:07,018 INFO L480 AbstractCegarLoop]: Interpolant automaton has 38 states. [2020-10-12 09:48:07,018 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 120 transitions. [2020-10-12 09:48:07,019 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2020-10-12 09:48:07,019 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:48:07,019 INFO L422 BasicCegarLoop]: trace histogram [35, 35, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:48:07,020 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2020-10-12 09:48:07,020 INFO L427 AbstractCegarLoop]: === Iteration 37 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:48:07,020 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:48:07,020 INFO L82 PathProgramCache]: Analyzing trace with hash -1973782810, now seen corresponding path program 35 times [2020-10-12 09:48:07,020 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:48:07,021 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1753650201] [2020-10-12 09:48:07,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:48:07,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:48:07,052 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:48:07,077 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:48:10,412 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:48:10,413 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 94 [2020-10-12 09:48:10,413 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 09:48:10,413 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3373 [2020-10-12 09:48:10,413 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:48:10,414 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 37 [2020-10-12 09:48:10,414 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 09:48:10,414 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 72 [2020-10-12 09:48:10,414 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:48:11,169 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:48:11,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:48:11,171 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:48:11,172 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:48:11,172 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:48:11,173 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:48:11,173 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 09:48:11,173 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:48:11,173 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:48:11,173 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:48:11,173 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:48:11,173 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:48:11,180 INFO L134 CoverageAnalysis]: Checked inductivity of 1225 backedges. 0 proven. 1225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 09:48:11,181 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1753650201] [2020-10-12 09:48:11,181 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:48:11,181 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39] total 39 [2020-10-12 09:48:11,181 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [374767506] [2020-10-12 09:48:11,182 INFO L459 AbstractCegarLoop]: Interpolant automaton has 39 states [2020-10-12 09:48:11,182 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:48:11,182 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2020-10-12 09:48:11,183 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=705, Invalid=777, Unknown=0, NotChecked=0, Total=1482 [2020-10-12 09:48:11,183 INFO L87 Difference]: Start difference. First operand 109 states and 120 transitions. Second operand 39 states. [2020-10-12 09:48:11,500 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:48:11,501 INFO L93 Difference]: Finished difference Result 144 states and 166 transitions. [2020-10-12 09:48:11,501 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-10-12 09:48:11,501 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 86 [2020-10-12 09:48:11,501 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:48:11,503 INFO L225 Difference]: With dead ends: 144 [2020-10-12 09:48:11,503 INFO L226 Difference]: Without dead ends: 112 [2020-10-12 09:48:11,504 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=705, Invalid=777, Unknown=0, NotChecked=0, Total=1482 [2020-10-12 09:48:11,504 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2020-10-12 09:48:11,507 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 111. [2020-10-12 09:48:11,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 111 states. [2020-10-12 09:48:11,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 122 transitions. [2020-10-12 09:48:11,509 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 122 transitions. Word has length 86 [2020-10-12 09:48:11,509 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:48:11,509 INFO L479 AbstractCegarLoop]: Abstraction has 111 states and 122 transitions. [2020-10-12 09:48:11,509 INFO L480 AbstractCegarLoop]: Interpolant automaton has 39 states. [2020-10-12 09:48:11,509 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 122 transitions. [2020-10-12 09:48:11,510 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2020-10-12 09:48:11,510 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:48:11,510 INFO L422 BasicCegarLoop]: trace histogram [36, 36, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:48:11,510 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2020-10-12 09:48:11,511 INFO L427 AbstractCegarLoop]: === Iteration 38 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:48:11,511 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:48:11,511 INFO L82 PathProgramCache]: Analyzing trace with hash 200282952, now seen corresponding path program 36 times [2020-10-12 09:48:11,511 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:48:11,511 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [697091909] [2020-10-12 09:48:11,511 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:48:11,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:48:11,543 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:48:11,566 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:48:14,787 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:48:14,787 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 96 [2020-10-12 09:48:14,788 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 09:48:14,788 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3257 [2020-10-12 09:48:14,788 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:48:14,788 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 38 [2020-10-12 09:48:14,788 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 09:48:14,788 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 74 [2020-10-12 09:48:14,789 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:48:15,621 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:48:15,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:48:15,623 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:48:15,624 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:48:15,624 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:48:15,624 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:48:15,624 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 09:48:15,625 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:48:15,625 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:48:15,625 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:48:15,625 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:48:15,625 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:48:15,635 INFO L134 CoverageAnalysis]: Checked inductivity of 1296 backedges. 0 proven. 1296 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 09:48:15,635 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [697091909] [2020-10-12 09:48:15,635 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:48:15,636 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40] total 40 [2020-10-12 09:48:15,636 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1390195973] [2020-10-12 09:48:15,637 INFO L459 AbstractCegarLoop]: Interpolant automaton has 40 states [2020-10-12 09:48:15,638 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:48:15,638 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2020-10-12 09:48:15,639 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=743, Invalid=817, Unknown=0, NotChecked=0, Total=1560 [2020-10-12 09:48:15,639 INFO L87 Difference]: Start difference. First operand 111 states and 122 transitions. Second operand 40 states. [2020-10-12 09:48:15,976 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:48:15,976 INFO L93 Difference]: Finished difference Result 146 states and 168 transitions. [2020-10-12 09:48:15,976 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-10-12 09:48:15,976 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 88 [2020-10-12 09:48:15,977 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:48:15,978 INFO L225 Difference]: With dead ends: 146 [2020-10-12 09:48:15,978 INFO L226 Difference]: Without dead ends: 114 [2020-10-12 09:48:15,979 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=743, Invalid=817, Unknown=0, NotChecked=0, Total=1560 [2020-10-12 09:48:15,980 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2020-10-12 09:48:15,985 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 113. [2020-10-12 09:48:15,986 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 113 states. [2020-10-12 09:48:15,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 124 transitions. [2020-10-12 09:48:15,987 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 124 transitions. Word has length 88 [2020-10-12 09:48:15,987 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:48:15,987 INFO L479 AbstractCegarLoop]: Abstraction has 113 states and 124 transitions. [2020-10-12 09:48:15,987 INFO L480 AbstractCegarLoop]: Interpolant automaton has 40 states. [2020-10-12 09:48:15,987 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 124 transitions. [2020-10-12 09:48:15,988 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2020-10-12 09:48:15,988 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:48:15,988 INFO L422 BasicCegarLoop]: trace histogram [37, 37, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:48:15,988 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2020-10-12 09:48:15,989 INFO L427 AbstractCegarLoop]: === Iteration 39 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:48:15,989 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:48:15,989 INFO L82 PathProgramCache]: Analyzing trace with hash 2123374378, now seen corresponding path program 37 times [2020-10-12 09:48:15,989 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:48:15,989 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [504018749] [2020-10-12 09:48:15,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:48:16,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:48:16,022 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:48:16,039 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:48:19,470 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:48:19,470 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 98 [2020-10-12 09:48:19,470 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 09:48:19,470 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3461 [2020-10-12 09:48:19,470 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:48:19,471 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 39 [2020-10-12 09:48:19,471 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 09:48:19,471 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 76 [2020-10-12 09:48:19,471 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:48:20,319 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:48:20,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:48:20,321 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:48:20,322 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:48:20,322 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:48:20,322 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:48:20,322 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 09:48:20,322 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:48:20,322 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:48:20,323 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:48:20,323 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:48:20,323 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:48:20,350 INFO L134 CoverageAnalysis]: Checked inductivity of 1369 backedges. 0 proven. 1369 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 09:48:20,351 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [504018749] [2020-10-12 09:48:20,351 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:48:20,351 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41] total 41 [2020-10-12 09:48:20,351 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [650414224] [2020-10-12 09:48:20,351 INFO L459 AbstractCegarLoop]: Interpolant automaton has 41 states [2020-10-12 09:48:20,352 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:48:20,352 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2020-10-12 09:48:20,353 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=782, Invalid=858, Unknown=0, NotChecked=0, Total=1640 [2020-10-12 09:48:20,353 INFO L87 Difference]: Start difference. First operand 113 states and 124 transitions. Second operand 41 states. [2020-10-12 09:48:20,665 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:48:20,665 INFO L93 Difference]: Finished difference Result 148 states and 170 transitions. [2020-10-12 09:48:20,665 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2020-10-12 09:48:20,665 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 90 [2020-10-12 09:48:20,666 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:48:20,666 INFO L225 Difference]: With dead ends: 148 [2020-10-12 09:48:20,667 INFO L226 Difference]: Without dead ends: 116 [2020-10-12 09:48:20,668 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=782, Invalid=858, Unknown=0, NotChecked=0, Total=1640 [2020-10-12 09:48:20,668 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2020-10-12 09:48:20,671 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 115. [2020-10-12 09:48:20,671 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 115 states. [2020-10-12 09:48:20,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 126 transitions. [2020-10-12 09:48:20,672 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 126 transitions. Word has length 90 [2020-10-12 09:48:20,672 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:48:20,672 INFO L479 AbstractCegarLoop]: Abstraction has 115 states and 126 transitions. [2020-10-12 09:48:20,672 INFO L480 AbstractCegarLoop]: Interpolant automaton has 41 states. [2020-10-12 09:48:20,672 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 126 transitions. [2020-10-12 09:48:20,673 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2020-10-12 09:48:20,673 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:48:20,673 INFO L422 BasicCegarLoop]: trace histogram [38, 38, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:48:20,673 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2020-10-12 09:48:20,673 INFO L427 AbstractCegarLoop]: === Iteration 40 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:48:20,674 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:48:20,674 INFO L82 PathProgramCache]: Analyzing trace with hash -916669812, now seen corresponding path program 38 times [2020-10-12 09:48:20,674 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:48:20,674 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [194149131] [2020-10-12 09:48:20,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:48:20,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:48:20,702 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:48:20,757 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:48:23,308 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:48:23,308 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 100 [2020-10-12 09:48:23,308 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 09:48:23,309 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2615 [2020-10-12 09:48:23,309 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:48:23,309 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 40 [2020-10-12 09:48:23,309 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 09:48:23,309 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 78 [2020-10-12 09:48:23,309 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:48:24,292 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:48:24,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:48:24,294 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:48:24,295 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:48:24,295 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:48:24,296 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:48:24,296 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 09:48:24,296 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:48:24,296 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:48:24,296 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:48:24,296 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:48:24,296 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:48:24,303 INFO L134 CoverageAnalysis]: Checked inductivity of 1444 backedges. 0 proven. 1444 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 09:48:24,303 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [194149131] [2020-10-12 09:48:24,303 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:48:24,303 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42] total 42 [2020-10-12 09:48:24,303 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [559267062] [2020-10-12 09:48:24,304 INFO L459 AbstractCegarLoop]: Interpolant automaton has 42 states [2020-10-12 09:48:24,304 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:48:24,304 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2020-10-12 09:48:24,305 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=822, Invalid=900, Unknown=0, NotChecked=0, Total=1722 [2020-10-12 09:48:24,305 INFO L87 Difference]: Start difference. First operand 115 states and 126 transitions. Second operand 42 states. [2020-10-12 09:48:24,536 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:48:24,536 INFO L93 Difference]: Finished difference Result 150 states and 172 transitions. [2020-10-12 09:48:24,537 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2020-10-12 09:48:24,537 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 92 [2020-10-12 09:48:24,537 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:48:24,538 INFO L225 Difference]: With dead ends: 150 [2020-10-12 09:48:24,538 INFO L226 Difference]: Without dead ends: 118 [2020-10-12 09:48:24,539 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=822, Invalid=900, Unknown=0, NotChecked=0, Total=1722 [2020-10-12 09:48:24,540 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2020-10-12 09:48:24,543 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 117. [2020-10-12 09:48:24,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 117 states. [2020-10-12 09:48:24,544 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 128 transitions. [2020-10-12 09:48:24,544 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 128 transitions. Word has length 92 [2020-10-12 09:48:24,544 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:48:24,545 INFO L479 AbstractCegarLoop]: Abstraction has 117 states and 128 transitions. [2020-10-12 09:48:24,545 INFO L480 AbstractCegarLoop]: Interpolant automaton has 42 states. [2020-10-12 09:48:24,545 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 128 transitions. [2020-10-12 09:48:24,546 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2020-10-12 09:48:24,546 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:48:24,546 INFO L422 BasicCegarLoop]: trace histogram [39, 39, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:48:24,546 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2020-10-12 09:48:24,546 INFO L427 AbstractCegarLoop]: === Iteration 41 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:48:24,546 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:48:24,547 INFO L82 PathProgramCache]: Analyzing trace with hash -1821375122, now seen corresponding path program 39 times [2020-10-12 09:48:24,547 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:48:24,547 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [755632608] [2020-10-12 09:48:24,547 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:48:24,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:48:24,577 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:48:24,633 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:48:27,388 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:48:27,388 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 102 [2020-10-12 09:48:27,388 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 09:48:27,389 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2822 [2020-10-12 09:48:27,389 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:48:27,389 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 41 [2020-10-12 09:48:27,389 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 09:48:27,389 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 80 [2020-10-12 09:48:27,389 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:48:28,293 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:48:28,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:48:28,296 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:48:28,297 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:48:28,297 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:48:28,297 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:48:28,297 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 09:48:28,297 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:48:28,297 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:48:28,297 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:48:28,297 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:48:28,297 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:48:28,305 INFO L134 CoverageAnalysis]: Checked inductivity of 1521 backedges. 0 proven. 1521 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 09:48:28,305 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [755632608] [2020-10-12 09:48:28,305 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:48:28,306 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43] total 43 [2020-10-12 09:48:28,306 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [749526641] [2020-10-12 09:48:28,306 INFO L459 AbstractCegarLoop]: Interpolant automaton has 43 states [2020-10-12 09:48:28,306 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:48:28,306 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2020-10-12 09:48:28,307 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=863, Invalid=943, Unknown=0, NotChecked=0, Total=1806 [2020-10-12 09:48:28,307 INFO L87 Difference]: Start difference. First operand 117 states and 128 transitions. Second operand 43 states. [2020-10-12 09:48:28,667 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:48:28,667 INFO L93 Difference]: Finished difference Result 152 states and 174 transitions. [2020-10-12 09:48:28,668 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2020-10-12 09:48:28,668 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 94 [2020-10-12 09:48:28,668 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:48:28,669 INFO L225 Difference]: With dead ends: 152 [2020-10-12 09:48:28,669 INFO L226 Difference]: Without dead ends: 120 [2020-10-12 09:48:28,671 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=863, Invalid=943, Unknown=0, NotChecked=0, Total=1806 [2020-10-12 09:48:28,671 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2020-10-12 09:48:28,673 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 119. [2020-10-12 09:48:28,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 119 states. [2020-10-12 09:48:28,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 130 transitions. [2020-10-12 09:48:28,674 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 130 transitions. Word has length 94 [2020-10-12 09:48:28,674 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:48:28,674 INFO L479 AbstractCegarLoop]: Abstraction has 119 states and 130 transitions. [2020-10-12 09:48:28,674 INFO L480 AbstractCegarLoop]: Interpolant automaton has 43 states. [2020-10-12 09:48:28,674 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 130 transitions. [2020-10-12 09:48:28,675 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2020-10-12 09:48:28,675 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:48:28,675 INFO L422 BasicCegarLoop]: trace histogram [40, 40, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:48:28,675 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2020-10-12 09:48:28,675 INFO L427 AbstractCegarLoop]: === Iteration 42 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:48:28,676 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:48:28,676 INFO L82 PathProgramCache]: Analyzing trace with hash 635183056, now seen corresponding path program 40 times [2020-10-12 09:48:28,676 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:48:28,676 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [856491533] [2020-10-12 09:48:28,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:48:28,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:48:28,710 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:48:28,770 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:48:31,684 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:48:31,684 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 104 [2020-10-12 09:48:31,684 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 09:48:31,684 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2988 [2020-10-12 09:48:31,684 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:48:31,685 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 42 [2020-10-12 09:48:31,685 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 09:48:31,685 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 82 [2020-10-12 09:48:31,685 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:48:32,666 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:48:32,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:48:32,669 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:48:32,670 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:48:32,670 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:48:32,670 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:48:32,670 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 09:48:32,670 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:48:32,670 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:48:32,670 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:48:32,671 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:48:32,671 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:48:32,679 INFO L134 CoverageAnalysis]: Checked inductivity of 1600 backedges. 0 proven. 1600 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 09:48:32,679 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [856491533] [2020-10-12 09:48:32,679 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:48:32,680 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [44] total 44 [2020-10-12 09:48:32,680 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [969374783] [2020-10-12 09:48:32,680 INFO L459 AbstractCegarLoop]: Interpolant automaton has 44 states [2020-10-12 09:48:32,680 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:48:32,681 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2020-10-12 09:48:32,681 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=905, Invalid=987, Unknown=0, NotChecked=0, Total=1892 [2020-10-12 09:48:32,681 INFO L87 Difference]: Start difference. First operand 119 states and 130 transitions. Second operand 44 states. [2020-10-12 09:48:33,041 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:48:33,041 INFO L93 Difference]: Finished difference Result 154 states and 176 transitions. [2020-10-12 09:48:33,041 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2020-10-12 09:48:33,042 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 96 [2020-10-12 09:48:33,042 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:48:33,043 INFO L225 Difference]: With dead ends: 154 [2020-10-12 09:48:33,043 INFO L226 Difference]: Without dead ends: 122 [2020-10-12 09:48:33,045 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=905, Invalid=987, Unknown=0, NotChecked=0, Total=1892 [2020-10-12 09:48:33,045 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2020-10-12 09:48:33,047 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 121. [2020-10-12 09:48:33,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 121 states. [2020-10-12 09:48:33,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 132 transitions. [2020-10-12 09:48:33,048 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 132 transitions. Word has length 96 [2020-10-12 09:48:33,048 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:48:33,048 INFO L479 AbstractCegarLoop]: Abstraction has 121 states and 132 transitions. [2020-10-12 09:48:33,048 INFO L480 AbstractCegarLoop]: Interpolant automaton has 44 states. [2020-10-12 09:48:33,049 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 132 transitions. [2020-10-12 09:48:33,049 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2020-10-12 09:48:33,049 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:48:33,049 INFO L422 BasicCegarLoop]: trace histogram [41, 41, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:48:33,049 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2020-10-12 09:48:33,050 INFO L427 AbstractCegarLoop]: === Iteration 43 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:48:33,050 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:48:33,050 INFO L82 PathProgramCache]: Analyzing trace with hash -844420686, now seen corresponding path program 41 times [2020-10-12 09:48:33,050 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:48:33,050 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1392491066] [2020-10-12 09:48:33,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:48:33,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:48:33,074 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:48:33,137 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:48:36,308 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:48:36,308 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 106 [2020-10-12 09:48:36,308 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 09:48:36,308 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3243 [2020-10-12 09:48:36,308 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:48:36,308 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 43 [2020-10-12 09:48:36,308 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 09:48:36,309 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 84 [2020-10-12 09:48:36,309 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:48:37,335 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:48:37,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:48:37,337 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:48:37,338 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:48:37,339 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:48:37,339 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:48:37,339 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 09:48:37,339 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:48:37,339 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:48:37,339 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:48:37,340 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:48:37,340 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:48:37,348 INFO L134 CoverageAnalysis]: Checked inductivity of 1681 backedges. 0 proven. 1681 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 09:48:37,348 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1392491066] [2020-10-12 09:48:37,348 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:48:37,348 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [45] total 45 [2020-10-12 09:48:37,348 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1361766841] [2020-10-12 09:48:37,349 INFO L459 AbstractCegarLoop]: Interpolant automaton has 45 states [2020-10-12 09:48:37,349 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:48:37,349 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2020-10-12 09:48:37,350 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=948, Invalid=1032, Unknown=0, NotChecked=0, Total=1980 [2020-10-12 09:48:37,350 INFO L87 Difference]: Start difference. First operand 121 states and 132 transitions. Second operand 45 states. [2020-10-12 09:48:37,723 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:48:37,723 INFO L93 Difference]: Finished difference Result 156 states and 178 transitions. [2020-10-12 09:48:37,724 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2020-10-12 09:48:37,724 INFO L78 Accepts]: Start accepts. Automaton has 45 states. Word has length 98 [2020-10-12 09:48:37,724 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:48:37,726 INFO L225 Difference]: With dead ends: 156 [2020-10-12 09:48:37,726 INFO L226 Difference]: Without dead ends: 124 [2020-10-12 09:48:37,727 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=948, Invalid=1032, Unknown=0, NotChecked=0, Total=1980 [2020-10-12 09:48:37,727 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2020-10-12 09:48:37,730 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 123. [2020-10-12 09:48:37,731 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 123 states. [2020-10-12 09:48:37,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 134 transitions. [2020-10-12 09:48:37,732 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 134 transitions. Word has length 98 [2020-10-12 09:48:37,732 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:48:37,732 INFO L479 AbstractCegarLoop]: Abstraction has 123 states and 134 transitions. [2020-10-12 09:48:37,732 INFO L480 AbstractCegarLoop]: Interpolant automaton has 45 states. [2020-10-12 09:48:37,732 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 134 transitions. [2020-10-12 09:48:37,733 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2020-10-12 09:48:37,733 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:48:37,733 INFO L422 BasicCegarLoop]: trace histogram [42, 42, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:48:37,733 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2020-10-12 09:48:37,733 INFO L427 AbstractCegarLoop]: === Iteration 44 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:48:37,733 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:48:37,734 INFO L82 PathProgramCache]: Analyzing trace with hash -1109441772, now seen corresponding path program 42 times [2020-10-12 09:48:37,734 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:48:37,734 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [323739001] [2020-10-12 09:48:37,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:48:37,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:48:37,759 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:48:37,822 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:48:41,229 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:48:41,229 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 108 [2020-10-12 09:48:41,229 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 09:48:41,230 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3480 [2020-10-12 09:48:41,230 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:48:41,230 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 44 [2020-10-12 09:48:41,230 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 09:48:41,230 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 86 [2020-10-12 09:48:41,230 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:48:42,293 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:48:42,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:48:42,295 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:48:42,296 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:48:42,296 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:48:42,297 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:48:42,297 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 09:48:42,297 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:48:42,297 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:48:42,297 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:48:42,297 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:48:42,297 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:48:42,305 INFO L134 CoverageAnalysis]: Checked inductivity of 1764 backedges. 0 proven. 1764 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 09:48:42,305 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [323739001] [2020-10-12 09:48:42,305 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:48:42,306 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [46] total 46 [2020-10-12 09:48:42,306 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [907880984] [2020-10-12 09:48:42,306 INFO L459 AbstractCegarLoop]: Interpolant automaton has 46 states [2020-10-12 09:48:42,306 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:48:42,307 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2020-10-12 09:48:42,307 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=992, Invalid=1078, Unknown=0, NotChecked=0, Total=2070 [2020-10-12 09:48:42,307 INFO L87 Difference]: Start difference. First operand 123 states and 134 transitions. Second operand 46 states. [2020-10-12 09:48:42,703 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:48:42,704 INFO L93 Difference]: Finished difference Result 158 states and 180 transitions. [2020-10-12 09:48:42,704 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2020-10-12 09:48:42,705 INFO L78 Accepts]: Start accepts. Automaton has 46 states. Word has length 100 [2020-10-12 09:48:42,705 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:48:42,706 INFO L225 Difference]: With dead ends: 158 [2020-10-12 09:48:42,706 INFO L226 Difference]: Without dead ends: 126 [2020-10-12 09:48:42,709 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=992, Invalid=1078, Unknown=0, NotChecked=0, Total=2070 [2020-10-12 09:48:42,709 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2020-10-12 09:48:42,713 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 125. [2020-10-12 09:48:42,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 125 states. [2020-10-12 09:48:42,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 136 transitions. [2020-10-12 09:48:42,715 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 136 transitions. Word has length 100 [2020-10-12 09:48:42,715 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:48:42,715 INFO L479 AbstractCegarLoop]: Abstraction has 125 states and 136 transitions. [2020-10-12 09:48:42,715 INFO L480 AbstractCegarLoop]: Interpolant automaton has 46 states. [2020-10-12 09:48:42,715 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 136 transitions. [2020-10-12 09:48:42,716 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2020-10-12 09:48:42,716 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:48:42,717 INFO L422 BasicCegarLoop]: trace histogram [43, 43, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:48:42,717 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2020-10-12 09:48:42,717 INFO L427 AbstractCegarLoop]: === Iteration 45 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:48:42,717 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:48:42,718 INFO L82 PathProgramCache]: Analyzing trace with hash 1903332342, now seen corresponding path program 43 times [2020-10-12 09:48:42,718 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:48:42,718 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [470984288] [2020-10-12 09:48:42,718 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:48:42,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:48:42,766 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:48:42,878 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:48:46,871 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:48:46,871 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 110 [2020-10-12 09:48:46,872 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 09:48:46,872 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4125 [2020-10-12 09:48:46,872 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:48:46,872 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 45 [2020-10-12 09:48:46,872 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 09:48:46,872 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 88 [2020-10-12 09:48:46,872 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:48:47,971 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:48:47,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:48:47,973 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:48:47,974 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:48:47,975 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:48:47,975 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:48:47,975 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 09:48:47,975 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:48:47,975 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:48:47,976 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:48:47,976 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:48:47,976 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:48:47,984 INFO L134 CoverageAnalysis]: Checked inductivity of 1849 backedges. 0 proven. 1849 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 09:48:47,984 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [470984288] [2020-10-12 09:48:47,984 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:48:47,984 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [47] total 47 [2020-10-12 09:48:47,984 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [612915230] [2020-10-12 09:48:47,985 INFO L459 AbstractCegarLoop]: Interpolant automaton has 47 states [2020-10-12 09:48:47,985 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:48:47,986 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2020-10-12 09:48:47,986 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1037, Invalid=1125, Unknown=0, NotChecked=0, Total=2162 [2020-10-12 09:48:47,986 INFO L87 Difference]: Start difference. First operand 125 states and 136 transitions. Second operand 47 states. [2020-10-12 09:48:48,240 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:48:48,240 INFO L93 Difference]: Finished difference Result 160 states and 182 transitions. [2020-10-12 09:48:48,240 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2020-10-12 09:48:48,240 INFO L78 Accepts]: Start accepts. Automaton has 47 states. Word has length 102 [2020-10-12 09:48:48,241 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:48:48,242 INFO L225 Difference]: With dead ends: 160 [2020-10-12 09:48:48,242 INFO L226 Difference]: Without dead ends: 128 [2020-10-12 09:48:48,243 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1037, Invalid=1125, Unknown=0, NotChecked=0, Total=2162 [2020-10-12 09:48:48,243 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2020-10-12 09:48:48,247 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 127. [2020-10-12 09:48:48,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 127 states. [2020-10-12 09:48:48,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 138 transitions. [2020-10-12 09:48:48,248 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 138 transitions. Word has length 102 [2020-10-12 09:48:48,248 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:48:48,248 INFO L479 AbstractCegarLoop]: Abstraction has 127 states and 138 transitions. [2020-10-12 09:48:48,249 INFO L480 AbstractCegarLoop]: Interpolant automaton has 47 states. [2020-10-12 09:48:48,249 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 138 transitions. [2020-10-12 09:48:48,249 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2020-10-12 09:48:48,249 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:48:48,249 INFO L422 BasicCegarLoop]: trace histogram [44, 44, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:48:48,250 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2020-10-12 09:48:48,250 INFO L427 AbstractCegarLoop]: === Iteration 46 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:48:48,250 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:48:48,250 INFO L82 PathProgramCache]: Analyzing trace with hash -1923668904, now seen corresponding path program 44 times [2020-10-12 09:48:48,250 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:48:48,250 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1567553560] [2020-10-12 09:48:48,251 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:48:48,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:48:48,276 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:48:48,349 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:48:52,279 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:48:52,280 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 112 [2020-10-12 09:48:52,280 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 09:48:52,280 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4013 [2020-10-12 09:48:52,280 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:48:52,280 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 46 [2020-10-12 09:48:52,280 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 09:48:52,280 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 90 [2020-10-12 09:48:52,281 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:48:53,447 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:48:53,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:48:53,450 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:48:53,451 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:48:53,451 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:48:53,451 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:48:53,451 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 09:48:53,451 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:48:53,451 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:48:53,452 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:48:53,452 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:48:53,452 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:48:53,460 INFO L134 CoverageAnalysis]: Checked inductivity of 1936 backedges. 0 proven. 1936 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 09:48:53,460 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1567553560] [2020-10-12 09:48:53,461 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:48:53,461 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [48] total 48 [2020-10-12 09:48:53,461 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1405553138] [2020-10-12 09:48:53,461 INFO L459 AbstractCegarLoop]: Interpolant automaton has 48 states [2020-10-12 09:48:53,461 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:48:53,462 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2020-10-12 09:48:53,462 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1083, Invalid=1173, Unknown=0, NotChecked=0, Total=2256 [2020-10-12 09:48:53,462 INFO L87 Difference]: Start difference. First operand 127 states and 138 transitions. Second operand 48 states. [2020-10-12 09:48:53,802 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:48:53,803 INFO L93 Difference]: Finished difference Result 162 states and 184 transitions. [2020-10-12 09:48:53,803 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2020-10-12 09:48:53,803 INFO L78 Accepts]: Start accepts. Automaton has 48 states. Word has length 104 [2020-10-12 09:48:53,804 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:48:53,804 INFO L225 Difference]: With dead ends: 162 [2020-10-12 09:48:53,805 INFO L226 Difference]: Without dead ends: 130 [2020-10-12 09:48:53,805 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1083, Invalid=1173, Unknown=0, NotChecked=0, Total=2256 [2020-10-12 09:48:53,806 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2020-10-12 09:48:53,810 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 129. [2020-10-12 09:48:53,810 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 129 states. [2020-10-12 09:48:53,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 140 transitions. [2020-10-12 09:48:53,812 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 140 transitions. Word has length 104 [2020-10-12 09:48:53,813 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:48:53,815 INFO L479 AbstractCegarLoop]: Abstraction has 129 states and 140 transitions. [2020-10-12 09:48:53,815 INFO L480 AbstractCegarLoop]: Interpolant automaton has 48 states. [2020-10-12 09:48:53,815 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 140 transitions. [2020-10-12 09:48:53,815 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2020-10-12 09:48:53,816 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:48:53,816 INFO L422 BasicCegarLoop]: trace histogram [45, 45, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:48:53,816 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2020-10-12 09:48:53,816 INFO L427 AbstractCegarLoop]: === Iteration 47 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:48:53,816 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:48:53,817 INFO L82 PathProgramCache]: Analyzing trace with hash 1115106362, now seen corresponding path program 45 times [2020-10-12 09:48:53,817 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:48:53,817 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1379919917] [2020-10-12 09:48:53,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:48:53,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:48:53,858 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:48:53,945 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:48:58,023 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:48:58,023 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 114 [2020-10-12 09:48:58,023 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 09:48:58,023 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4183 [2020-10-12 09:48:58,024 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:48:58,024 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 47 [2020-10-12 09:48:58,024 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 09:48:58,024 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 92 [2020-10-12 09:48:58,024 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:48:59,244 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:48:59,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:48:59,246 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:48:59,247 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:48:59,247 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:48:59,247 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:48:59,247 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 09:48:59,247 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:48:59,247 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:48:59,247 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:48:59,247 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:48:59,248 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:48:59,256 INFO L134 CoverageAnalysis]: Checked inductivity of 2025 backedges. 0 proven. 2025 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 09:48:59,256 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1379919917] [2020-10-12 09:48:59,257 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:48:59,257 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [49] total 49 [2020-10-12 09:48:59,257 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [884831047] [2020-10-12 09:48:59,257 INFO L459 AbstractCegarLoop]: Interpolant automaton has 49 states [2020-10-12 09:48:59,257 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:48:59,258 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2020-10-12 09:48:59,258 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1130, Invalid=1222, Unknown=0, NotChecked=0, Total=2352 [2020-10-12 09:48:59,258 INFO L87 Difference]: Start difference. First operand 129 states and 140 transitions. Second operand 49 states. [2020-10-12 09:48:59,665 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:48:59,666 INFO L93 Difference]: Finished difference Result 164 states and 186 transitions. [2020-10-12 09:48:59,666 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2020-10-12 09:48:59,666 INFO L78 Accepts]: Start accepts. Automaton has 49 states. Word has length 106 [2020-10-12 09:48:59,667 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:48:59,668 INFO L225 Difference]: With dead ends: 164 [2020-10-12 09:48:59,668 INFO L226 Difference]: Without dead ends: 132 [2020-10-12 09:48:59,669 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1130, Invalid=1222, Unknown=0, NotChecked=0, Total=2352 [2020-10-12 09:48:59,670 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2020-10-12 09:48:59,674 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 131. [2020-10-12 09:48:59,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 131 states. [2020-10-12 09:48:59,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 142 transitions. [2020-10-12 09:48:59,675 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 142 transitions. Word has length 106 [2020-10-12 09:48:59,675 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:48:59,675 INFO L479 AbstractCegarLoop]: Abstraction has 131 states and 142 transitions. [2020-10-12 09:48:59,675 INFO L480 AbstractCegarLoop]: Interpolant automaton has 49 states. [2020-10-12 09:48:59,675 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 142 transitions. [2020-10-12 09:48:59,676 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2020-10-12 09:48:59,676 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:48:59,676 INFO L422 BasicCegarLoop]: trace histogram [46, 46, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:48:59,676 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2020-10-12 09:48:59,676 INFO L427 AbstractCegarLoop]: === Iteration 48 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:48:59,676 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:48:59,676 INFO L82 PathProgramCache]: Analyzing trace with hash 800375708, now seen corresponding path program 46 times [2020-10-12 09:48:59,676 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:48:59,677 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [411843374] [2020-10-12 09:48:59,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:48:59,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:48:59,703 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:48:59,781 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:49:04,196 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:49:04,197 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 116 [2020-10-12 09:49:04,197 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 09:49:04,197 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4504 [2020-10-12 09:49:04,197 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:49:04,197 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 48 [2020-10-12 09:49:04,197 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 09:49:04,197 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 94 [2020-10-12 09:49:04,198 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:49:05,475 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:49:05,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:49:05,476 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:49:05,477 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:49:05,477 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:49:05,477 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:49:05,477 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 09:49:05,477 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:49:05,477 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:49:05,477 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:49:05,477 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:49:05,478 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:49:05,487 INFO L134 CoverageAnalysis]: Checked inductivity of 2116 backedges. 0 proven. 2116 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 09:49:05,487 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [411843374] [2020-10-12 09:49:05,487 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:49:05,487 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [50] total 50 [2020-10-12 09:49:05,487 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [977550318] [2020-10-12 09:49:05,487 INFO L459 AbstractCegarLoop]: Interpolant automaton has 50 states [2020-10-12 09:49:05,488 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:49:05,488 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2020-10-12 09:49:05,488 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1178, Invalid=1272, Unknown=0, NotChecked=0, Total=2450 [2020-10-12 09:49:05,488 INFO L87 Difference]: Start difference. First operand 131 states and 142 transitions. Second operand 50 states. [2020-10-12 09:49:05,833 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:49:05,833 INFO L93 Difference]: Finished difference Result 166 states and 188 transitions. [2020-10-12 09:49:05,833 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2020-10-12 09:49:05,834 INFO L78 Accepts]: Start accepts. Automaton has 50 states. Word has length 108 [2020-10-12 09:49:05,834 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:49:05,835 INFO L225 Difference]: With dead ends: 166 [2020-10-12 09:49:05,835 INFO L226 Difference]: Without dead ends: 134 [2020-10-12 09:49:05,836 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1178, Invalid=1272, Unknown=0, NotChecked=0, Total=2450 [2020-10-12 09:49:05,837 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2020-10-12 09:49:05,841 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 133. [2020-10-12 09:49:05,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 133 states. [2020-10-12 09:49:05,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 144 transitions. [2020-10-12 09:49:05,842 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 144 transitions. Word has length 108 [2020-10-12 09:49:05,842 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:49:05,842 INFO L479 AbstractCegarLoop]: Abstraction has 133 states and 144 transitions. [2020-10-12 09:49:05,842 INFO L480 AbstractCegarLoop]: Interpolant automaton has 50 states. [2020-10-12 09:49:05,842 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 144 transitions. [2020-10-12 09:49:05,843 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2020-10-12 09:49:05,843 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:49:05,843 INFO L422 BasicCegarLoop]: trace histogram [47, 47, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:49:05,843 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2020-10-12 09:49:05,843 INFO L427 AbstractCegarLoop]: === Iteration 49 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:49:05,843 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:49:05,844 INFO L82 PathProgramCache]: Analyzing trace with hash -1008072066, now seen corresponding path program 47 times [2020-10-12 09:49:05,844 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:49:05,844 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1480508246] [2020-10-12 09:49:05,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:49:05,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:49:05,870 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:49:05,950 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:49:10,854 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:49:10,855 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 118 [2020-10-12 09:49:10,855 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 09:49:10,855 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4995 [2020-10-12 09:49:10,855 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:49:10,855 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 49 [2020-10-12 09:49:10,855 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 09:49:10,855 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 96 [2020-10-12 09:49:10,855 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:49:12,183 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:49:12,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:49:12,184 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:49:12,185 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:49:12,186 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:49:12,186 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:49:12,186 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 09:49:12,186 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:49:12,186 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:49:12,186 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:49:12,186 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:49:12,186 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:49:12,196 INFO L134 CoverageAnalysis]: Checked inductivity of 2209 backedges. 0 proven. 2209 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 09:49:12,197 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1480508246] [2020-10-12 09:49:12,197 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:49:12,197 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [51] total 51 [2020-10-12 09:49:12,197 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [613086102] [2020-10-12 09:49:12,197 INFO L459 AbstractCegarLoop]: Interpolant automaton has 51 states [2020-10-12 09:49:12,198 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:49:12,198 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2020-10-12 09:49:12,198 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1227, Invalid=1323, Unknown=0, NotChecked=0, Total=2550 [2020-10-12 09:49:12,198 INFO L87 Difference]: Start difference. First operand 133 states and 144 transitions. Second operand 51 states. [2020-10-12 09:49:12,675 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:49:12,675 INFO L93 Difference]: Finished difference Result 168 states and 190 transitions. [2020-10-12 09:49:12,676 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2020-10-12 09:49:12,676 INFO L78 Accepts]: Start accepts. Automaton has 51 states. Word has length 110 [2020-10-12 09:49:12,676 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:49:12,677 INFO L225 Difference]: With dead ends: 168 [2020-10-12 09:49:12,677 INFO L226 Difference]: Without dead ends: 136 [2020-10-12 09:49:12,678 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1227, Invalid=1323, Unknown=0, NotChecked=0, Total=2550 [2020-10-12 09:49:12,679 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2020-10-12 09:49:12,686 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 135. [2020-10-12 09:49:12,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 135 states. [2020-10-12 09:49:12,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 146 transitions. [2020-10-12 09:49:12,687 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 146 transitions. Word has length 110 [2020-10-12 09:49:12,688 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:49:12,688 INFO L479 AbstractCegarLoop]: Abstraction has 135 states and 146 transitions. [2020-10-12 09:49:12,688 INFO L480 AbstractCegarLoop]: Interpolant automaton has 51 states. [2020-10-12 09:49:12,688 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 146 transitions. [2020-10-12 09:49:12,689 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2020-10-12 09:49:12,689 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:49:12,689 INFO L422 BasicCegarLoop]: trace histogram [48, 48, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:49:12,689 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2020-10-12 09:49:12,689 INFO L427 AbstractCegarLoop]: === Iteration 50 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:49:12,689 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:49:12,690 INFO L82 PathProgramCache]: Analyzing trace with hash 535372000, now seen corresponding path program 48 times [2020-10-12 09:49:12,690 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:49:12,690 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1903029925] [2020-10-12 09:49:12,691 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:49:12,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:49:12,725 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:49:12,805 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:49:17,720 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:49:17,720 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 120 [2020-10-12 09:49:17,720 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 09:49:17,720 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-10-12 09:49:17,720 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:49:17,721 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 50 [2020-10-12 09:49:17,721 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 09:49:17,721 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 98 [2020-10-12 09:49:17,721 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:49:19,086 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:49:19,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:49:19,087 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:49:19,088 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:49:19,089 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:49:19,089 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:49:19,089 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 09:49:19,089 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:49:19,089 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:49:19,089 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:49:19,089 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:49:19,089 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:49:19,099 INFO L134 CoverageAnalysis]: Checked inductivity of 2304 backedges. 0 proven. 2304 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 09:49:19,099 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1903029925] [2020-10-12 09:49:19,099 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:49:19,099 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [52] total 52 [2020-10-12 09:49:19,099 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1570409300] [2020-10-12 09:49:19,100 INFO L459 AbstractCegarLoop]: Interpolant automaton has 52 states [2020-10-12 09:49:19,100 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:49:19,100 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2020-10-12 09:49:19,101 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1277, Invalid=1375, Unknown=0, NotChecked=0, Total=2652 [2020-10-12 09:49:19,101 INFO L87 Difference]: Start difference. First operand 135 states and 146 transitions. Second operand 52 states. [2020-10-12 09:49:19,536 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:49:19,536 INFO L93 Difference]: Finished difference Result 170 states and 192 transitions. [2020-10-12 09:49:19,537 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2020-10-12 09:49:19,537 INFO L78 Accepts]: Start accepts. Automaton has 52 states. Word has length 112 [2020-10-12 09:49:19,537 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:49:19,538 INFO L225 Difference]: With dead ends: 170 [2020-10-12 09:49:19,539 INFO L226 Difference]: Without dead ends: 138 [2020-10-12 09:49:19,539 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1277, Invalid=1375, Unknown=0, NotChecked=0, Total=2652 [2020-10-12 09:49:19,540 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2020-10-12 09:49:19,543 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 137. [2020-10-12 09:49:19,544 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 137 states. [2020-10-12 09:49:19,544 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 148 transitions. [2020-10-12 09:49:19,544 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 148 transitions. Word has length 112 [2020-10-12 09:49:19,545 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:49:19,545 INFO L479 AbstractCegarLoop]: Abstraction has 137 states and 148 transitions. [2020-10-12 09:49:19,545 INFO L480 AbstractCegarLoop]: Interpolant automaton has 52 states. [2020-10-12 09:49:19,545 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 148 transitions. [2020-10-12 09:49:19,545 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2020-10-12 09:49:19,545 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:49:19,546 INFO L422 BasicCegarLoop]: trace histogram [49, 49, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:49:19,546 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2020-10-12 09:49:19,546 INFO L427 AbstractCegarLoop]: === Iteration 51 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:49:19,546 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:49:19,546 INFO L82 PathProgramCache]: Analyzing trace with hash 2021402306, now seen corresponding path program 49 times [2020-10-12 09:49:19,547 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:49:19,547 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [675411403] [2020-10-12 09:49:19,547 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:49:19,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:49:19,575 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:49:19,664 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:49:24,564 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:49:24,564 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 122 [2020-10-12 09:49:24,564 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 09:49:24,564 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-12 09:49:24,564 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:49:24,564 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 51 [2020-10-12 09:49:24,564 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 09:49:24,564 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 100 [2020-10-12 09:49:24,565 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:49:25,997 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:49:25,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:49:25,998 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:49:25,999 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:49:26,000 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:49:26,000 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:49:26,000 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 09:49:26,000 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:49:26,000 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:49:26,000 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:49:26,001 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:49:26,001 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:49:26,011 INFO L134 CoverageAnalysis]: Checked inductivity of 2401 backedges. 0 proven. 2401 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 09:49:26,011 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [675411403] [2020-10-12 09:49:26,011 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:49:26,011 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [53] total 53 [2020-10-12 09:49:26,011 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1974205302] [2020-10-12 09:49:26,011 INFO L459 AbstractCegarLoop]: Interpolant automaton has 53 states [2020-10-12 09:49:26,012 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:49:26,012 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2020-10-12 09:49:26,012 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1328, Invalid=1428, Unknown=0, NotChecked=0, Total=2756 [2020-10-12 09:49:26,012 INFO L87 Difference]: Start difference. First operand 137 states and 148 transitions. Second operand 53 states. [2020-10-12 09:49:26,450 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:49:26,451 INFO L93 Difference]: Finished difference Result 172 states and 194 transitions. [2020-10-12 09:49:26,451 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2020-10-12 09:49:26,451 INFO L78 Accepts]: Start accepts. Automaton has 53 states. Word has length 114 [2020-10-12 09:49:26,452 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:49:26,453 INFO L225 Difference]: With dead ends: 172 [2020-10-12 09:49:26,453 INFO L226 Difference]: Without dead ends: 140 [2020-10-12 09:49:26,454 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1328, Invalid=1428, Unknown=0, NotChecked=0, Total=2756 [2020-10-12 09:49:26,455 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2020-10-12 09:49:26,458 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 139. [2020-10-12 09:49:26,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 139 states. [2020-10-12 09:49:26,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 150 transitions. [2020-10-12 09:49:26,459 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 150 transitions. Word has length 114 [2020-10-12 09:49:26,459 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:49:26,459 INFO L479 AbstractCegarLoop]: Abstraction has 139 states and 150 transitions. [2020-10-12 09:49:26,459 INFO L480 AbstractCegarLoop]: Interpolant automaton has 53 states. [2020-10-12 09:49:26,459 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 150 transitions. [2020-10-12 09:49:26,460 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2020-10-12 09:49:26,460 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:49:26,460 INFO L422 BasicCegarLoop]: trace histogram [50, 50, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:49:26,460 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2020-10-12 09:49:26,460 INFO L427 AbstractCegarLoop]: === Iteration 52 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:49:26,460 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:49:26,461 INFO L82 PathProgramCache]: Analyzing trace with hash -127583196, now seen corresponding path program 50 times [2020-10-12 09:49:26,461 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:49:26,461 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [255962436] [2020-10-12 09:49:26,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:49:26,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:49:26,491 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:49:26,579 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:49:31,494 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:49:31,494 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 124 [2020-10-12 09:49:31,494 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 09:49:31,494 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5014 [2020-10-12 09:49:31,494 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:49:31,494 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 52 [2020-10-12 09:49:31,494 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 09:49:31,494 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 102 [2020-10-12 09:49:31,495 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:49:32,975 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:49:32,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:49:32,976 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:49:32,978 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:49:32,978 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:49:32,978 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:49:32,978 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 09:49:32,978 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:49:32,979 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:49:32,979 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:49:32,979 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:49:32,979 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:49:32,989 INFO L134 CoverageAnalysis]: Checked inductivity of 2500 backedges. 0 proven. 2500 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 09:49:32,989 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [255962436] [2020-10-12 09:49:32,989 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:49:32,990 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [54] total 54 [2020-10-12 09:49:32,990 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [591720581] [2020-10-12 09:49:32,990 INFO L459 AbstractCegarLoop]: Interpolant automaton has 54 states [2020-10-12 09:49:32,990 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:49:32,991 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2020-10-12 09:49:32,991 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1380, Invalid=1482, Unknown=0, NotChecked=0, Total=2862 [2020-10-12 09:49:32,991 INFO L87 Difference]: Start difference. First operand 139 states and 150 transitions. Second operand 54 states. [2020-10-12 09:49:33,441 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:49:33,441 INFO L93 Difference]: Finished difference Result 174 states and 196 transitions. [2020-10-12 09:49:33,442 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2020-10-12 09:49:33,442 INFO L78 Accepts]: Start accepts. Automaton has 54 states. Word has length 116 [2020-10-12 09:49:33,442 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:49:33,444 INFO L225 Difference]: With dead ends: 174 [2020-10-12 09:49:33,444 INFO L226 Difference]: Without dead ends: 142 [2020-10-12 09:49:33,445 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1380, Invalid=1482, Unknown=0, NotChecked=0, Total=2862 [2020-10-12 09:49:33,445 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2020-10-12 09:49:33,448 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 141. [2020-10-12 09:49:33,449 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 141 states. [2020-10-12 09:49:33,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 152 transitions. [2020-10-12 09:49:33,449 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 152 transitions. Word has length 116 [2020-10-12 09:49:33,450 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:49:33,450 INFO L479 AbstractCegarLoop]: Abstraction has 141 states and 152 transitions. [2020-10-12 09:49:33,450 INFO L480 AbstractCegarLoop]: Interpolant automaton has 54 states. [2020-10-12 09:49:33,450 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 152 transitions. [2020-10-12 09:49:33,451 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2020-10-12 09:49:33,451 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:49:33,451 INFO L422 BasicCegarLoop]: trace histogram [51, 51, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:49:33,451 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2020-10-12 09:49:33,452 INFO L427 AbstractCegarLoop]: === Iteration 53 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:49:33,452 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:49:33,452 INFO L82 PathProgramCache]: Analyzing trace with hash 576618758, now seen corresponding path program 51 times [2020-10-12 09:49:33,452 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:49:33,452 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [744140773] [2020-10-12 09:49:33,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:49:33,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:49:33,483 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:49:33,573 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:49:38,506 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:49:38,506 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 126 [2020-10-12 09:49:38,506 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 09:49:38,506 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5035 [2020-10-12 09:49:38,506 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:49:38,506 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 53 [2020-10-12 09:49:38,506 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 09:49:38,507 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 104 [2020-10-12 09:49:38,507 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:49:40,046 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:49:40,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:49:40,048 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:49:40,049 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:49:40,050 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:49:40,050 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:49:40,050 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 09:49:40,050 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:49:40,050 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:49:40,051 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:49:40,051 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:49:40,051 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:49:40,062 INFO L134 CoverageAnalysis]: Checked inductivity of 2601 backedges. 0 proven. 2601 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 09:49:40,062 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [744140773] [2020-10-12 09:49:40,062 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:49:40,063 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [55] total 55 [2020-10-12 09:49:40,063 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1193507844] [2020-10-12 09:49:40,063 INFO L459 AbstractCegarLoop]: Interpolant automaton has 55 states [2020-10-12 09:49:40,063 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:49:40,063 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2020-10-12 09:49:40,064 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1433, Invalid=1537, Unknown=0, NotChecked=0, Total=2970 [2020-10-12 09:49:40,064 INFO L87 Difference]: Start difference. First operand 141 states and 152 transitions. Second operand 55 states. [2020-10-12 09:49:40,528 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:49:40,528 INFO L93 Difference]: Finished difference Result 176 states and 198 transitions. [2020-10-12 09:49:40,529 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2020-10-12 09:49:40,529 INFO L78 Accepts]: Start accepts. Automaton has 55 states. Word has length 118 [2020-10-12 09:49:40,529 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:49:40,531 INFO L225 Difference]: With dead ends: 176 [2020-10-12 09:49:40,531 INFO L226 Difference]: Without dead ends: 144 [2020-10-12 09:49:40,532 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=1433, Invalid=1537, Unknown=0, NotChecked=0, Total=2970 [2020-10-12 09:49:40,533 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2020-10-12 09:49:40,536 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 143. [2020-10-12 09:49:40,536 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 143 states. [2020-10-12 09:49:40,537 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 154 transitions. [2020-10-12 09:49:40,537 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 154 transitions. Word has length 118 [2020-10-12 09:49:40,537 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:49:40,537 INFO L479 AbstractCegarLoop]: Abstraction has 143 states and 154 transitions. [2020-10-12 09:49:40,537 INFO L480 AbstractCegarLoop]: Interpolant automaton has 55 states. [2020-10-12 09:49:40,537 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 154 transitions. [2020-10-12 09:49:40,538 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2020-10-12 09:49:40,538 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:49:40,538 INFO L422 BasicCegarLoop]: trace histogram [52, 52, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:49:40,538 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2020-10-12 09:49:40,539 INFO L427 AbstractCegarLoop]: === Iteration 54 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:49:40,539 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:49:40,539 INFO L82 PathProgramCache]: Analyzing trace with hash -1290136216, now seen corresponding path program 52 times [2020-10-12 09:49:40,539 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:49:40,539 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1073121723] [2020-10-12 09:49:40,539 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:49:40,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:49:40,570 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:49:40,664 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:49:45,581 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:49:45,582 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 128 [2020-10-12 09:49:45,582 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 09:49:45,582 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5024 [2020-10-12 09:49:45,582 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:49:45,582 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 54 [2020-10-12 09:49:45,582 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 09:49:45,582 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 106 [2020-10-12 09:49:45,582 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:49:47,202 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:49:47,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:49:47,203 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:49:47,204 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:49:47,204 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:49:47,204 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:49:47,205 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 09:49:47,205 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:49:47,205 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:49:47,205 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:49:47,205 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:49:47,205 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:49:47,216 INFO L134 CoverageAnalysis]: Checked inductivity of 2704 backedges. 0 proven. 2704 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 09:49:47,216 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1073121723] [2020-10-12 09:49:47,216 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:49:47,217 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [56] total 56 [2020-10-12 09:49:47,217 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1208396875] [2020-10-12 09:49:47,217 INFO L459 AbstractCegarLoop]: Interpolant automaton has 56 states [2020-10-12 09:49:47,217 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:49:47,218 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2020-10-12 09:49:47,218 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1487, Invalid=1593, Unknown=0, NotChecked=0, Total=3080 [2020-10-12 09:49:47,218 INFO L87 Difference]: Start difference. First operand 143 states and 154 transitions. Second operand 56 states. [2020-10-12 09:49:47,689 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:49:47,689 INFO L93 Difference]: Finished difference Result 178 states and 200 transitions. [2020-10-12 09:49:47,690 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2020-10-12 09:49:47,690 INFO L78 Accepts]: Start accepts. Automaton has 56 states. Word has length 120 [2020-10-12 09:49:47,690 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:49:47,691 INFO L225 Difference]: With dead ends: 178 [2020-10-12 09:49:47,691 INFO L226 Difference]: Without dead ends: 146 [2020-10-12 09:49:47,692 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=1487, Invalid=1593, Unknown=0, NotChecked=0, Total=3080 [2020-10-12 09:49:47,692 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2020-10-12 09:49:47,695 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 145. [2020-10-12 09:49:47,695 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 145 states. [2020-10-12 09:49:47,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 156 transitions. [2020-10-12 09:49:47,696 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 156 transitions. Word has length 120 [2020-10-12 09:49:47,696 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:49:47,696 INFO L479 AbstractCegarLoop]: Abstraction has 145 states and 156 transitions. [2020-10-12 09:49:47,697 INFO L480 AbstractCegarLoop]: Interpolant automaton has 56 states. [2020-10-12 09:49:47,697 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 156 transitions. [2020-10-12 09:49:47,697 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2020-10-12 09:49:47,697 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:49:47,697 INFO L422 BasicCegarLoop]: trace histogram [53, 53, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:49:47,698 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2020-10-12 09:49:47,698 INFO L427 AbstractCegarLoop]: === Iteration 55 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:49:47,698 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:49:47,698 INFO L82 PathProgramCache]: Analyzing trace with hash 54663498, now seen corresponding path program 53 times [2020-10-12 09:49:47,698 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:49:47,698 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [336384623] [2020-10-12 09:49:47,699 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:49:47,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:49:47,733 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:49:47,831 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:49:52,734 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:49:52,734 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 130 [2020-10-12 09:49:52,734 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 09:49:52,735 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5016 [2020-10-12 09:49:52,735 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:49:52,735 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 55 [2020-10-12 09:49:52,735 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 09:49:52,735 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 108 [2020-10-12 09:49:52,735 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:49:54,413 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:49:54,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:49:54,415 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:49:54,416 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:49:54,416 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:49:54,416 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:49:54,416 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 09:49:54,416 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:49:54,417 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:49:54,417 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:49:54,417 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:49:54,417 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:49:54,428 INFO L134 CoverageAnalysis]: Checked inductivity of 2809 backedges. 0 proven. 2809 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 09:49:54,429 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [336384623] [2020-10-12 09:49:54,429 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:49:54,429 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [57] total 57 [2020-10-12 09:49:54,430 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1916740825] [2020-10-12 09:49:54,432 INFO L459 AbstractCegarLoop]: Interpolant automaton has 57 states [2020-10-12 09:49:54,432 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:49:54,433 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2020-10-12 09:49:54,433 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1542, Invalid=1650, Unknown=0, NotChecked=0, Total=3192 [2020-10-12 09:49:54,433 INFO L87 Difference]: Start difference. First operand 145 states and 156 transitions. Second operand 57 states. [2020-10-12 09:49:54,922 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:49:54,922 INFO L93 Difference]: Finished difference Result 180 states and 202 transitions. [2020-10-12 09:49:54,922 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2020-10-12 09:49:54,923 INFO L78 Accepts]: Start accepts. Automaton has 57 states. Word has length 122 [2020-10-12 09:49:54,923 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:49:54,924 INFO L225 Difference]: With dead ends: 180 [2020-10-12 09:49:54,924 INFO L226 Difference]: Without dead ends: 148 [2020-10-12 09:49:54,925 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=1542, Invalid=1650, Unknown=0, NotChecked=0, Total=3192 [2020-10-12 09:49:54,925 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2020-10-12 09:49:54,928 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 147. [2020-10-12 09:49:54,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 147 states. [2020-10-12 09:49:54,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 158 transitions. [2020-10-12 09:49:54,929 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 158 transitions. Word has length 122 [2020-10-12 09:49:54,930 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:49:54,930 INFO L479 AbstractCegarLoop]: Abstraction has 147 states and 158 transitions. [2020-10-12 09:49:54,930 INFO L480 AbstractCegarLoop]: Interpolant automaton has 57 states. [2020-10-12 09:49:54,930 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 158 transitions. [2020-10-12 09:49:54,931 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2020-10-12 09:49:54,931 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:49:54,931 INFO L422 BasicCegarLoop]: trace histogram [54, 54, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:49:54,931 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2020-10-12 09:49:54,931 INFO L427 AbstractCegarLoop]: === Iteration 56 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:49:54,932 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:49:54,932 INFO L82 PathProgramCache]: Analyzing trace with hash -377967444, now seen corresponding path program 54 times [2020-10-12 09:49:54,932 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:49:54,932 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [720370993] [2020-10-12 09:49:54,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:49:54,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:49:54,976 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:49:55,081 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:49:59,973 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:49:59,973 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 132 [2020-10-12 09:49:59,973 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 09:49:59,973 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5014 [2020-10-12 09:49:59,973 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:49:59,974 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 56 [2020-10-12 09:49:59,974 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 09:49:59,974 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 110 [2020-10-12 09:49:59,974 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:50:01,727 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:50:01,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:50:01,729 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:50:01,730 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:50:01,730 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:50:01,730 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:50:01,730 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 09:50:01,730 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:50:01,730 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:50:01,730 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:50:01,730 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:50:01,731 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:50:01,742 INFO L134 CoverageAnalysis]: Checked inductivity of 2916 backedges. 0 proven. 2916 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 09:50:01,743 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [720370993] [2020-10-12 09:50:01,743 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:50:01,743 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [58] total 58 [2020-10-12 09:50:01,743 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1401453975] [2020-10-12 09:50:01,743 INFO L459 AbstractCegarLoop]: Interpolant automaton has 58 states [2020-10-12 09:50:01,743 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:50:01,744 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2020-10-12 09:50:01,744 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1598, Invalid=1708, Unknown=0, NotChecked=0, Total=3306 [2020-10-12 09:50:01,744 INFO L87 Difference]: Start difference. First operand 147 states and 158 transitions. Second operand 58 states. [2020-10-12 09:50:02,245 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:50:02,245 INFO L93 Difference]: Finished difference Result 182 states and 204 transitions. [2020-10-12 09:50:02,246 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2020-10-12 09:50:02,246 INFO L78 Accepts]: Start accepts. Automaton has 58 states. Word has length 124 [2020-10-12 09:50:02,247 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:50:02,248 INFO L225 Difference]: With dead ends: 182 [2020-10-12 09:50:02,248 INFO L226 Difference]: Without dead ends: 150 [2020-10-12 09:50:02,249 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=1598, Invalid=1708, Unknown=0, NotChecked=0, Total=3306 [2020-10-12 09:50:02,249 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2020-10-12 09:50:02,252 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 149. [2020-10-12 09:50:02,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 149 states. [2020-10-12 09:50:02,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 160 transitions. [2020-10-12 09:50:02,253 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 160 transitions. Word has length 124 [2020-10-12 09:50:02,253 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:50:02,254 INFO L479 AbstractCegarLoop]: Abstraction has 149 states and 160 transitions. [2020-10-12 09:50:02,254 INFO L480 AbstractCegarLoop]: Interpolant automaton has 58 states. [2020-10-12 09:50:02,254 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 160 transitions. [2020-10-12 09:50:02,254 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2020-10-12 09:50:02,254 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:50:02,255 INFO L422 BasicCegarLoop]: trace histogram [55, 55, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:50:02,255 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2020-10-12 09:50:02,255 INFO L427 AbstractCegarLoop]: === Iteration 57 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:50:02,255 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:50:02,255 INFO L82 PathProgramCache]: Analyzing trace with hash 475525006, now seen corresponding path program 55 times [2020-10-12 09:50:02,255 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:50:02,256 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1807603589] [2020-10-12 09:50:02,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:50:02,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:50:02,297 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:50:04,537 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:50:07,287 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:50:07,288 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 134 [2020-10-12 09:50:07,288 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 09:50:07,288 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-12 09:50:07,288 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:50:07,288 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 57 [2020-10-12 09:50:07,288 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 09:50:07,288 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 112 [2020-10-12 09:50:07,288 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:50:09,123 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:50:09,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:50:09,126 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:50:09,127 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:50:09,127 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:50:09,127 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:50:09,127 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 09:50:09,127 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:50:09,127 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:50:09,127 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:50:09,128 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:50:09,128 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:50:09,140 INFO L134 CoverageAnalysis]: Checked inductivity of 3025 backedges. 0 proven. 3025 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 09:50:09,140 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1807603589] [2020-10-12 09:50:09,140 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:50:09,141 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [59] total 59 [2020-10-12 09:50:09,141 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1013907674] [2020-10-12 09:50:09,141 INFO L459 AbstractCegarLoop]: Interpolant automaton has 59 states [2020-10-12 09:50:09,141 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:50:09,142 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2020-10-12 09:50:09,142 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1655, Invalid=1767, Unknown=0, NotChecked=0, Total=3422 [2020-10-12 09:50:09,142 INFO L87 Difference]: Start difference. First operand 149 states and 160 transitions. Second operand 59 states. [2020-10-12 09:50:09,476 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:50:09,476 INFO L93 Difference]: Finished difference Result 184 states and 206 transitions. [2020-10-12 09:50:09,477 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2020-10-12 09:50:09,477 INFO L78 Accepts]: Start accepts. Automaton has 59 states. Word has length 126 [2020-10-12 09:50:09,478 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:50:09,479 INFO L225 Difference]: With dead ends: 184 [2020-10-12 09:50:09,479 INFO L226 Difference]: Without dead ends: 152 [2020-10-12 09:50:09,480 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=1655, Invalid=1767, Unknown=0, NotChecked=0, Total=3422 [2020-10-12 09:50:09,480 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2020-10-12 09:50:09,483 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 151. [2020-10-12 09:50:09,484 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 151 states. [2020-10-12 09:50:09,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 162 transitions. [2020-10-12 09:50:09,484 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 162 transitions. Word has length 126 [2020-10-12 09:50:09,485 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:50:09,485 INFO L479 AbstractCegarLoop]: Abstraction has 151 states and 162 transitions. [2020-10-12 09:50:09,485 INFO L480 AbstractCegarLoop]: Interpolant automaton has 59 states. [2020-10-12 09:50:09,485 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 162 transitions. [2020-10-12 09:50:09,486 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2020-10-12 09:50:09,486 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:50:09,486 INFO L422 BasicCegarLoop]: trace histogram [56, 56, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:50:09,486 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2020-10-12 09:50:09,486 INFO L427 AbstractCegarLoop]: === Iteration 58 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:50:09,486 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:50:09,487 INFO L82 PathProgramCache]: Analyzing trace with hash 343015920, now seen corresponding path program 56 times [2020-10-12 09:50:09,487 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:50:09,487 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [688084770] [2020-10-12 09:50:09,487 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:50:09,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:50:09,532 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:50:11,904 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:50:14,520 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:50:14,521 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 136 [2020-10-12 09:50:14,521 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 09:50:14,521 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5006 [2020-10-12 09:50:14,521 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:50:14,521 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 58 [2020-10-12 09:50:14,521 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 09:50:14,521 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 114 [2020-10-12 09:50:14,521 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:50:16,414 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:50:16,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:50:16,416 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:50:16,418 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:50:16,418 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:50:16,418 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:50:16,418 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 09:50:16,418 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:50:16,418 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:50:16,418 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:50:16,419 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:50:16,419 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:50:16,433 INFO L134 CoverageAnalysis]: Checked inductivity of 3136 backedges. 0 proven. 3136 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 09:50:16,433 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [688084770] [2020-10-12 09:50:16,433 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:50:16,434 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [60] total 60 [2020-10-12 09:50:16,434 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1697392763] [2020-10-12 09:50:16,434 INFO L459 AbstractCegarLoop]: Interpolant automaton has 60 states [2020-10-12 09:50:16,434 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:50:16,435 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2020-10-12 09:50:16,435 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1713, Invalid=1827, Unknown=0, NotChecked=0, Total=3540 [2020-10-12 09:50:16,436 INFO L87 Difference]: Start difference. First operand 151 states and 162 transitions. Second operand 60 states. [2020-10-12 09:50:16,951 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:50:16,951 INFO L93 Difference]: Finished difference Result 186 states and 208 transitions. [2020-10-12 09:50:16,952 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2020-10-12 09:50:16,952 INFO L78 Accepts]: Start accepts. Automaton has 60 states. Word has length 128 [2020-10-12 09:50:16,952 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:50:16,953 INFO L225 Difference]: With dead ends: 186 [2020-10-12 09:50:16,954 INFO L226 Difference]: Without dead ends: 154 [2020-10-12 09:50:16,955 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=1713, Invalid=1827, Unknown=0, NotChecked=0, Total=3540 [2020-10-12 09:50:16,955 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2020-10-12 09:50:16,959 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 153. [2020-10-12 09:50:16,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 153 states. [2020-10-12 09:50:16,959 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 164 transitions. [2020-10-12 09:50:16,960 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 164 transitions. Word has length 128 [2020-10-12 09:50:16,960 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:50:16,960 INFO L479 AbstractCegarLoop]: Abstraction has 153 states and 164 transitions. [2020-10-12 09:50:16,960 INFO L480 AbstractCegarLoop]: Interpolant automaton has 60 states. [2020-10-12 09:50:16,960 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 164 transitions. [2020-10-12 09:50:16,961 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2020-10-12 09:50:16,961 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:50:16,961 INFO L422 BasicCegarLoop]: trace histogram [57, 57, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:50:16,961 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2020-10-12 09:50:16,961 INFO L427 AbstractCegarLoop]: === Iteration 59 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:50:16,962 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:50:16,962 INFO L82 PathProgramCache]: Analyzing trace with hash 1850803154, now seen corresponding path program 57 times [2020-10-12 09:50:16,962 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:50:16,962 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [801057958] [2020-10-12 09:50:16,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:50:16,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:50:17,003 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:50:17,147 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:50:22,001 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:50:22,001 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 138 [2020-10-12 09:50:22,001 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 09:50:22,002 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5012 [2020-10-12 09:50:22,002 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:50:22,002 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 59 [2020-10-12 09:50:22,002 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 09:50:22,002 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 116 [2020-10-12 09:50:22,002 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:50:23,921 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:50:23,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:50:23,923 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:50:23,923 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:50:23,924 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:50:23,924 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:50:23,924 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 09:50:23,924 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:50:23,924 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:50:23,924 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:50:23,924 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:50:23,924 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:50:23,936 INFO L134 CoverageAnalysis]: Checked inductivity of 3249 backedges. 0 proven. 3249 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 09:50:23,937 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [801057958] [2020-10-12 09:50:23,937 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:50:23,937 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [61] total 61 [2020-10-12 09:50:23,937 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [575505622] [2020-10-12 09:50:23,937 INFO L459 AbstractCegarLoop]: Interpolant automaton has 61 states [2020-10-12 09:50:23,937 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:50:23,938 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2020-10-12 09:50:23,938 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1772, Invalid=1888, Unknown=0, NotChecked=0, Total=3660 [2020-10-12 09:50:23,938 INFO L87 Difference]: Start difference. First operand 153 states and 164 transitions. Second operand 61 states. [2020-10-12 09:50:24,430 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:50:24,430 INFO L93 Difference]: Finished difference Result 188 states and 210 transitions. [2020-10-12 09:50:24,430 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2020-10-12 09:50:24,430 INFO L78 Accepts]: Start accepts. Automaton has 61 states. Word has length 130 [2020-10-12 09:50:24,431 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:50:24,432 INFO L225 Difference]: With dead ends: 188 [2020-10-12 09:50:24,432 INFO L226 Difference]: Without dead ends: 156 [2020-10-12 09:50:24,433 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=1772, Invalid=1888, Unknown=0, NotChecked=0, Total=3660 [2020-10-12 09:50:24,433 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156 states. [2020-10-12 09:50:24,436 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156 to 155. [2020-10-12 09:50:24,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 155 states. [2020-10-12 09:50:24,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 166 transitions. [2020-10-12 09:50:24,437 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 166 transitions. Word has length 130 [2020-10-12 09:50:24,437 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:50:24,437 INFO L479 AbstractCegarLoop]: Abstraction has 155 states and 166 transitions. [2020-10-12 09:50:24,437 INFO L480 AbstractCegarLoop]: Interpolant automaton has 61 states. [2020-10-12 09:50:24,437 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 166 transitions. [2020-10-12 09:50:24,438 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2020-10-12 09:50:24,438 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:50:24,438 INFO L422 BasicCegarLoop]: trace histogram [58, 58, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:50:24,439 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2020-10-12 09:50:24,439 INFO L427 AbstractCegarLoop]: === Iteration 60 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:50:24,439 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:50:24,439 INFO L82 PathProgramCache]: Analyzing trace with hash -864611020, now seen corresponding path program 58 times [2020-10-12 09:50:24,439 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:50:24,439 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [144653008] [2020-10-12 09:50:24,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:50:24,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:50:24,493 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:50:24,692 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:50:29,503 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:50:29,503 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 140 [2020-10-12 09:50:29,503 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 09:50:29,503 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5033 [2020-10-12 09:50:29,503 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:50:29,503 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 60 [2020-10-12 09:50:29,503 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 09:50:29,504 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 118 [2020-10-12 09:50:29,504 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:50:31,461 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:50:31,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:50:31,463 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:50:31,464 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:50:31,464 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:50:31,464 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:50:31,464 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 09:50:31,464 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:50:31,465 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:50:31,465 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:50:31,465 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:50:31,465 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:50:31,477 INFO L134 CoverageAnalysis]: Checked inductivity of 3364 backedges. 0 proven. 3364 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 09:50:31,477 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [144653008] [2020-10-12 09:50:31,477 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:50:31,477 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [62] total 62 [2020-10-12 09:50:31,478 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1430991322] [2020-10-12 09:50:31,478 INFO L459 AbstractCegarLoop]: Interpolant automaton has 62 states [2020-10-12 09:50:31,478 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:50:31,478 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2020-10-12 09:50:31,479 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1832, Invalid=1950, Unknown=0, NotChecked=0, Total=3782 [2020-10-12 09:50:31,479 INFO L87 Difference]: Start difference. First operand 155 states and 166 transitions. Second operand 62 states. [2020-10-12 09:50:31,917 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:50:31,917 INFO L93 Difference]: Finished difference Result 190 states and 212 transitions. [2020-10-12 09:50:31,918 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2020-10-12 09:50:31,918 INFO L78 Accepts]: Start accepts. Automaton has 62 states. Word has length 132 [2020-10-12 09:50:31,919 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:50:31,920 INFO L225 Difference]: With dead ends: 190 [2020-10-12 09:50:31,920 INFO L226 Difference]: Without dead ends: 158 [2020-10-12 09:50:31,921 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=1832, Invalid=1950, Unknown=0, NotChecked=0, Total=3782 [2020-10-12 09:50:31,921 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2020-10-12 09:50:31,924 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 157. [2020-10-12 09:50:31,925 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 157 states. [2020-10-12 09:50:31,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 168 transitions. [2020-10-12 09:50:31,925 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 168 transitions. Word has length 132 [2020-10-12 09:50:31,926 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:50:31,926 INFO L479 AbstractCegarLoop]: Abstraction has 157 states and 168 transitions. [2020-10-12 09:50:31,926 INFO L480 AbstractCegarLoop]: Interpolant automaton has 62 states. [2020-10-12 09:50:31,926 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 168 transitions. [2020-10-12 09:50:31,927 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2020-10-12 09:50:31,927 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:50:31,927 INFO L422 BasicCegarLoop]: trace histogram [59, 59, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:50:31,927 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2020-10-12 09:50:31,927 INFO L427 AbstractCegarLoop]: === Iteration 61 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:50:31,927 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:50:31,928 INFO L82 PathProgramCache]: Analyzing trace with hash 962483734, now seen corresponding path program 59 times [2020-10-12 09:50:31,928 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:50:31,928 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [542263444] [2020-10-12 09:50:31,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:50:31,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:50:31,976 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:50:32,097 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:50:37,006 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:50:37,006 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 142 [2020-10-12 09:50:37,006 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 09:50:37,006 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5049 [2020-10-12 09:50:37,006 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:50:37,007 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 61 [2020-10-12 09:50:37,007 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 09:50:37,007 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 120 [2020-10-12 09:50:37,007 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:50:39,070 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:50:39,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:50:39,071 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:50:39,072 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:50:39,073 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:50:39,073 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:50:39,073 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 09:50:39,073 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:50:39,073 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:50:39,073 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:50:39,073 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:50:39,073 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:50:39,086 INFO L134 CoverageAnalysis]: Checked inductivity of 3481 backedges. 0 proven. 3481 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 09:50:39,086 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [542263444] [2020-10-12 09:50:39,086 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:50:39,086 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [63] total 63 [2020-10-12 09:50:39,086 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1399397260] [2020-10-12 09:50:39,087 INFO L459 AbstractCegarLoop]: Interpolant automaton has 63 states [2020-10-12 09:50:39,087 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:50:39,087 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2020-10-12 09:50:39,088 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1893, Invalid=2013, Unknown=0, NotChecked=0, Total=3906 [2020-10-12 09:50:39,088 INFO L87 Difference]: Start difference. First operand 157 states and 168 transitions. Second operand 63 states. [2020-10-12 09:50:39,622 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:50:39,623 INFO L93 Difference]: Finished difference Result 192 states and 214 transitions. [2020-10-12 09:50:39,623 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2020-10-12 09:50:39,623 INFO L78 Accepts]: Start accepts. Automaton has 63 states. Word has length 134 [2020-10-12 09:50:39,624 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:50:39,625 INFO L225 Difference]: With dead ends: 192 [2020-10-12 09:50:39,625 INFO L226 Difference]: Without dead ends: 160 [2020-10-12 09:50:39,626 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=1893, Invalid=2013, Unknown=0, NotChecked=0, Total=3906 [2020-10-12 09:50:39,627 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2020-10-12 09:50:39,630 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 159. [2020-10-12 09:50:39,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 159 states. [2020-10-12 09:50:39,631 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 170 transitions. [2020-10-12 09:50:39,631 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 170 transitions. Word has length 134 [2020-10-12 09:50:39,631 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:50:39,631 INFO L479 AbstractCegarLoop]: Abstraction has 159 states and 170 transitions. [2020-10-12 09:50:39,631 INFO L480 AbstractCegarLoop]: Interpolant automaton has 63 states. [2020-10-12 09:50:39,632 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 170 transitions. [2020-10-12 09:50:39,632 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2020-10-12 09:50:39,632 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:50:39,633 INFO L422 BasicCegarLoop]: trace histogram [60, 60, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:50:39,633 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2020-10-12 09:50:39,633 INFO L427 AbstractCegarLoop]: === Iteration 62 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:50:39,633 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:50:39,633 INFO L82 PathProgramCache]: Analyzing trace with hash 158918264, now seen corresponding path program 60 times [2020-10-12 09:50:39,633 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:50:39,634 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [984087452] [2020-10-12 09:50:39,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:50:39,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:50:39,690 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:50:39,942 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:50:44,687 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:50:44,687 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 144 [2020-10-12 09:50:44,687 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 09:50:44,687 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5022 [2020-10-12 09:50:44,688 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:50:44,688 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 62 [2020-10-12 09:50:44,688 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 09:50:44,688 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 122 [2020-10-12 09:50:44,688 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:50:46,838 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:50:46,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:50:46,840 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:50:46,841 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:50:46,841 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:50:46,841 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:50:46,841 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 09:50:46,842 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:50:46,842 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:50:46,842 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:50:46,842 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:50:46,842 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:50:46,855 INFO L134 CoverageAnalysis]: Checked inductivity of 3600 backedges. 0 proven. 3600 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 09:50:46,855 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [984087452] [2020-10-12 09:50:46,855 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:50:46,855 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [64] total 64 [2020-10-12 09:50:46,855 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1065262450] [2020-10-12 09:50:46,856 INFO L459 AbstractCegarLoop]: Interpolant automaton has 64 states [2020-10-12 09:50:46,856 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:50:46,856 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2020-10-12 09:50:46,857 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1955, Invalid=2077, Unknown=0, NotChecked=0, Total=4032 [2020-10-12 09:50:46,857 INFO L87 Difference]: Start difference. First operand 159 states and 170 transitions. Second operand 64 states. [2020-10-12 09:50:47,312 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:50:47,312 INFO L93 Difference]: Finished difference Result 194 states and 216 transitions. [2020-10-12 09:50:47,313 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2020-10-12 09:50:47,313 INFO L78 Accepts]: Start accepts. Automaton has 64 states. Word has length 136 [2020-10-12 09:50:47,313 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:50:47,314 INFO L225 Difference]: With dead ends: 194 [2020-10-12 09:50:47,315 INFO L226 Difference]: Without dead ends: 162 [2020-10-12 09:50:47,316 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=1955, Invalid=2077, Unknown=0, NotChecked=0, Total=4032 [2020-10-12 09:50:47,316 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2020-10-12 09:50:47,319 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 161. [2020-10-12 09:50:47,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 161 states. [2020-10-12 09:50:47,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 172 transitions. [2020-10-12 09:50:47,320 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 172 transitions. Word has length 136 [2020-10-12 09:50:47,321 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:50:47,321 INFO L479 AbstractCegarLoop]: Abstraction has 161 states and 172 transitions. [2020-10-12 09:50:47,321 INFO L480 AbstractCegarLoop]: Interpolant automaton has 64 states. [2020-10-12 09:50:47,321 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 172 transitions. [2020-10-12 09:50:47,321 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2020-10-12 09:50:47,321 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:50:47,321 INFO L422 BasicCegarLoop]: trace histogram [61, 61, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:50:47,322 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61 [2020-10-12 09:50:47,322 INFO L427 AbstractCegarLoop]: === Iteration 63 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:50:47,322 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:50:47,322 INFO L82 PathProgramCache]: Analyzing trace with hash 1026614874, now seen corresponding path program 61 times [2020-10-12 09:50:47,322 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:50:47,322 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [518036126] [2020-10-12 09:50:47,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:50:47,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:50:47,377 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:50:47,545 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:50:52,403 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:50:52,403 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 146 [2020-10-12 09:50:52,403 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 09:50:52,403 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5051 [2020-10-12 09:50:52,404 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:50:52,404 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 63 [2020-10-12 09:50:52,404 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 09:50:52,404 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 124 [2020-10-12 09:50:52,404 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:50:54,664 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:50:54,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:50:54,667 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:50:54,667 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:50:54,667 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:50:54,668 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:50:54,668 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 09:50:54,668 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:50:54,668 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:50:54,668 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:50:54,668 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:50:54,668 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:50:54,680 INFO L134 CoverageAnalysis]: Checked inductivity of 3721 backedges. 0 proven. 3721 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 09:50:54,680 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [518036126] [2020-10-12 09:50:54,680 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:50:54,681 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [65] total 65 [2020-10-12 09:50:54,681 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1711205039] [2020-10-12 09:50:54,681 INFO L459 AbstractCegarLoop]: Interpolant automaton has 65 states [2020-10-12 09:50:54,681 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:50:54,682 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2020-10-12 09:50:54,682 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2018, Invalid=2142, Unknown=0, NotChecked=0, Total=4160 [2020-10-12 09:50:54,682 INFO L87 Difference]: Start difference. First operand 161 states and 172 transitions. Second operand 65 states. [2020-10-12 09:50:55,249 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:50:55,249 INFO L93 Difference]: Finished difference Result 196 states and 218 transitions. [2020-10-12 09:50:55,249 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2020-10-12 09:50:55,249 INFO L78 Accepts]: Start accepts. Automaton has 65 states. Word has length 138 [2020-10-12 09:50:55,250 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:50:55,251 INFO L225 Difference]: With dead ends: 196 [2020-10-12 09:50:55,251 INFO L226 Difference]: Without dead ends: 164 [2020-10-12 09:50:55,252 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=2018, Invalid=2142, Unknown=0, NotChecked=0, Total=4160 [2020-10-12 09:50:55,252 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164 states. [2020-10-12 09:50:55,256 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164 to 163. [2020-10-12 09:50:55,256 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 163 states. [2020-10-12 09:50:55,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 174 transitions. [2020-10-12 09:50:55,257 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 174 transitions. Word has length 138 [2020-10-12 09:50:55,257 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:50:55,257 INFO L479 AbstractCegarLoop]: Abstraction has 163 states and 174 transitions. [2020-10-12 09:50:55,257 INFO L480 AbstractCegarLoop]: Interpolant automaton has 65 states. [2020-10-12 09:50:55,258 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 174 transitions. [2020-10-12 09:50:55,259 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2020-10-12 09:50:55,260 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:50:55,260 INFO L422 BasicCegarLoop]: trace histogram [62, 62, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:50:55,260 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62 [2020-10-12 09:50:55,260 INFO L427 AbstractCegarLoop]: === Iteration 64 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:50:55,260 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:50:55,261 INFO L82 PathProgramCache]: Analyzing trace with hash 1659401660, now seen corresponding path program 62 times [2020-10-12 09:50:55,261 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:50:55,261 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [153614015] [2020-10-12 09:50:55,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:50:55,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:50:55,311 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:50:55,443 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:51:00,297 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:51:00,297 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 148 [2020-10-12 09:51:00,297 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 09:51:00,297 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-12 09:51:00,298 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:51:00,298 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 64 [2020-10-12 09:51:00,298 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 09:51:00,298 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 126 [2020-10-12 09:51:00,298 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0