/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=SMALLESTAMONGWIDE --traceabstraction.additional.smt.options tolerance=0.2 --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-fpi/condg.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-adbd35c [2020-10-14 18:08:52,819 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-14 18:08:52,822 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-14 18:08:52,845 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-14 18:08:52,846 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-14 18:08:52,847 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-14 18:08:52,848 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-14 18:08:52,850 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-14 18:08:52,851 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-14 18:08:52,852 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-14 18:08:52,853 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-14 18:08:52,854 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-14 18:08:52,854 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-14 18:08:52,855 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-14 18:08:52,856 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-14 18:08:52,857 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-14 18:08:52,858 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-14 18:08:52,859 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-14 18:08:52,860 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-14 18:08:52,862 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-14 18:08:52,864 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-14 18:08:52,865 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-14 18:08:52,866 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-14 18:08:52,866 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-14 18:08:52,872 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-14 18:08:52,872 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-14 18:08:52,872 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-14 18:08:52,873 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-14 18:08:52,873 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-14 18:08:52,874 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-14 18:08:52,875 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-14 18:08:52,875 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-14 18:08:52,876 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-14 18:08:52,877 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-14 18:08:52,878 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-14 18:08:52,878 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-14 18:08:52,879 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-14 18:08:52,879 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-14 18:08:52,879 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-14 18:08:52,880 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-14 18:08:52,880 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-14 18:08:52,881 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 [2020-10-14 18:08:52,903 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-14 18:08:52,903 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-14 18:08:52,904 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-14 18:08:52,904 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-14 18:08:52,904 INFO L138 SettingsManager]: * Use SBE=true [2020-10-14 18:08:52,905 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-14 18:08:52,905 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-14 18:08:52,905 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-14 18:08:52,905 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-14 18:08:52,905 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-14 18:08:52,905 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-14 18:08:52,906 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-14 18:08:52,906 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-14 18:08:52,906 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-14 18:08:52,906 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-14 18:08:52,906 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-14 18:08:52,907 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-14 18:08:52,907 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-14 18:08:52,907 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-14 18:08:52,907 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-14 18:08:52,907 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-14 18:08:52,908 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-14 18:08:52,908 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-14 18:08:52,908 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-14 18:08:52,908 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-14 18:08:52,908 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-14 18:08:52,909 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-14 18:08:52,909 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-14 18:08:52,909 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-14 18:08:52,909 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=SMALLESTAMONGWIDE;tolerance=0.2;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=SMALLESTAMONGWIDE;tolerance=0.2;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=SMALLESTAMONGWIDE;tolerance=0.2;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=SMALLESTAMONGWIDE;tolerance=0.2;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=SMALLESTAMONGWIDE;tolerance=0.2;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=SMALLESTAMONGWIDE;tolerance=0.2;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=SMALLESTAMONGWIDE;tolerance=0.2;log-additional-information=true;unknown-allowed=true; [2020-10-14 18:08:53,212 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-14 18:08:53,224 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-14 18:08:53,227 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-14 18:08:53,229 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-14 18:08:53,229 INFO L275 PluginConnector]: CDTParser initialized [2020-10-14 18:08:53,230 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-fpi/condg.c [2020-10-14 18:08:53,286 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/882db3d73/62de8cb2c356448b8ae8542ca06546a2/FLAGf67d42ccc [2020-10-14 18:08:53,691 INFO L306 CDTParser]: Found 1 translation units. [2020-10-14 18:08:53,692 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/array-fpi/condg.c [2020-10-14 18:08:53,698 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/882db3d73/62de8cb2c356448b8ae8542ca06546a2/FLAGf67d42ccc [2020-10-14 18:08:54,123 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/882db3d73/62de8cb2c356448b8ae8542ca06546a2 [2020-10-14 18:08:54,132 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-14 18:08:54,134 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-14 18:08:54,135 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-14 18:08:54,135 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-14 18:08:54,140 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-14 18:08:54,141 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 06:08:54" (1/1) ... [2020-10-14 18:08:54,144 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2f2210ab and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 06:08:54, skipping insertion in model container [2020-10-14 18:08:54,144 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 06:08:54" (1/1) ... [2020-10-14 18:08:54,153 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-14 18:08:54,175 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-14 18:08:54,424 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-14 18:08:54,438 INFO L203 MainTranslator]: Completed pre-run [2020-10-14 18:08:54,463 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-14 18:08:54,569 INFO L208 MainTranslator]: Completed translation [2020-10-14 18:08:54,570 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 06:08:54 WrapperNode [2020-10-14 18:08:54,570 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-14 18:08:54,571 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-14 18:08:54,571 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-14 18:08:54,571 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-14 18:08:54,585 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 06:08:54" (1/1) ... [2020-10-14 18:08:54,585 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 06:08:54" (1/1) ... [2020-10-14 18:08:54,602 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 06:08:54" (1/1) ... [2020-10-14 18:08:54,603 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 06:08:54" (1/1) ... [2020-10-14 18:08:54,611 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 06:08:54" (1/1) ... [2020-10-14 18:08:54,617 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 06:08:54" (1/1) ... [2020-10-14 18:08:54,619 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 06:08:54" (1/1) ... [2020-10-14 18:08:54,621 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-14 18:08:54,622 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-14 18:08:54,622 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-14 18:08:54,622 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-14 18:08:54,623 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 06:08:54" (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 [2020-10-14 18:08:54,678 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-14 18:08:54,679 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-14 18:08:54,679 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-10-14 18:08:54,679 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-14 18:08:54,679 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-14 18:08:54,680 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-10-14 18:08:54,680 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-14 18:08:54,681 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-10-14 18:08:54,681 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-14 18:08:54,682 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-14 18:08:54,682 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-10-14 18:08:54,682 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-14 18:08:54,682 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-14 18:08:54,682 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-10-14 18:08:54,682 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-14 18:08:54,683 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-14 18:08:54,683 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-14 18:08:54,683 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-14 18:08:54,684 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-14 18:08:54,942 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-14 18:08:54,943 INFO L295 CfgBuilder]: Removed 4 assume(true) statements. [2020-10-14 18:08:54,947 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 06:08:54 BoogieIcfgContainer [2020-10-14 18:08:54,947 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-14 18:08:54,950 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-14 18:08:54,950 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-14 18:08:54,953 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-14 18:08:54,954 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.10 06:08:54" (1/3) ... [2020-10-14 18:08:54,955 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4d46337c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 06:08:54, skipping insertion in model container [2020-10-14 18:08:54,955 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 06:08:54" (2/3) ... [2020-10-14 18:08:54,956 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4d46337c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 06:08:54, skipping insertion in model container [2020-10-14 18:08:54,956 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 06:08:54" (3/3) ... [2020-10-14 18:08:54,958 INFO L109 eAbstractionObserver]: Analyzing ICFG condg.c [2020-10-14 18:08:54,970 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-14 18:08:54,978 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-14 18:08:54,996 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-14 18:08:55,022 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-10-14 18:08:55,023 INFO L376 AbstractCegarLoop]: Hoare is true [2020-10-14 18:08:55,023 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-14 18:08:55,023 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-14 18:08:55,023 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-14 18:08:55,023 INFO L380 AbstractCegarLoop]: Difference is false [2020-10-14 18:08:55,024 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-14 18:08:55,024 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-14 18:08:55,044 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states. [2020-10-14 18:08:55,054 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-14 18:08:55,054 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 18:08:55,058 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 18:08:55,059 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 18:08:55,069 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 18:08:55,070 INFO L82 PathProgramCache]: Analyzing trace with hash 1314310818, now seen corresponding path program 1 times [2020-10-14 18:08:55,081 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 18:08:55,082 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [982241044] [2020-10-14 18:08:55,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 18:08:55,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:08:55,231 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:08:55,297 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:08:55,356 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:08:55,405 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:08:55,587 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:08:55,624 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:08:55,660 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:08:56,221 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:08:56,222 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 34 [2020-10-14 18:08:56,222 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-14 18:08:56,222 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1013 [2020-10-14 18:08:56,226 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:08:56,226 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:08:56,226 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-14 18:08:56,227 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-14 18:08:56,227 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-14 18:08:56,227 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-10-14 18:08:56,298 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 18:08:56,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:08:56,302 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:08:56,304 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:08:56,305 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 18:08:56,305 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:08:56,305 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-14 18:08:56,306 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:08:56,306 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:08:56,306 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:08:56,307 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:08:56,307 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:08:56,307 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 18:08:56,311 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-14 18:08:56,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:08:56,314 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:08:56,315 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:08:56,319 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:08:56,319 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-14 18:08:56,319 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 18:08:56,320 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-14 18:08:56,320 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:08:56,320 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:08:56,320 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 18:08:56,321 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:08:56,321 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-14 18:08:56,322 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-14 18:08:56,328 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 18:08:56,329 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [982241044] [2020-10-14 18:08:56,331 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 18:08:56,331 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-14 18:08:56,332 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1580263911] [2020-10-14 18:08:56,339 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-14 18:08:56,339 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 18:08:56,358 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-14 18:08:56,360 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-14 18:08:56,363 INFO L87 Difference]: Start difference. First operand 38 states. Second operand 5 states. [2020-10-14 18:08:56,575 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 18:08:56,576 INFO L93 Difference]: Finished difference Result 74 states and 102 transitions. [2020-10-14 18:08:56,576 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-14 18:08:56,578 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 24 [2020-10-14 18:08:56,578 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 18:08:56,587 INFO L225 Difference]: With dead ends: 74 [2020-10-14 18:08:56,587 INFO L226 Difference]: Without dead ends: 37 [2020-10-14 18:08:56,591 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-14 18:08:56,610 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2020-10-14 18:08:56,631 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 36. [2020-10-14 18:08:56,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-10-14 18:08:56,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 40 transitions. [2020-10-14 18:08:56,636 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 40 transitions. Word has length 24 [2020-10-14 18:08:56,636 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 18:08:56,636 INFO L479 AbstractCegarLoop]: Abstraction has 36 states and 40 transitions. [2020-10-14 18:08:56,637 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-14 18:08:56,637 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 40 transitions. [2020-10-14 18:08:56,638 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-10-14 18:08:56,638 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 18:08:56,638 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 18:08:56,639 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-14 18:08:56,639 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 18:08:56,639 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 18:08:56,639 INFO L82 PathProgramCache]: Analyzing trace with hash -1408881596, now seen corresponding path program 1 times [2020-10-14 18:08:56,640 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 18:08:56,640 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [899035527] [2020-10-14 18:08:56,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 18:08:56,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:08:56,675 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:08:56,787 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:08:57,103 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:08:57,171 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:08:57,558 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:08:57,696 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:08:58,078 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:08:58,087 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 41 [2020-10-14 18:08:58,087 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-14 18:08:58,088 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1415 [2020-10-14 18:08:58,088 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:08:58,088 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:08:58,089 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-14 18:08:58,089 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-14 18:08:58,089 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-14 18:08:58,089 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 18:08:58,299 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 18:08:58,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:08:58,302 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:08:58,304 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:08:58,305 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 18:08:58,305 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:08:58,305 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-14 18:08:58,306 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:08:58,306 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:08:58,307 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:08:58,307 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:08:58,307 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:08:58,308 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 18:08:58,310 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-14 18:08:58,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:08:58,311 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:08:58,313 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:08:58,313 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-14 18:08:58,314 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:08:58,314 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 18:08:58,314 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:08:58,315 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:08:58,315 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:08:58,315 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:08:58,316 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:08:58,316 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 18:08:58,322 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 18:08:58,323 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [899035527] [2020-10-14 18:08:58,323 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 18:08:58,323 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-14 18:08:58,324 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [55032586] [2020-10-14 18:08:58,325 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-14 18:08:58,326 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 18:08:58,326 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-14 18:08:58,326 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2020-10-14 18:08:58,327 INFO L87 Difference]: Start difference. First operand 36 states and 40 transitions. Second operand 12 states. [2020-10-14 18:08:58,826 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 18:08:58,826 INFO L93 Difference]: Finished difference Result 58 states and 66 transitions. [2020-10-14 18:08:58,827 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-14 18:08:58,827 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 31 [2020-10-14 18:08:58,827 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 18:08:58,831 INFO L225 Difference]: With dead ends: 58 [2020-10-14 18:08:58,831 INFO L226 Difference]: Without dead ends: 56 [2020-10-14 18:08:58,833 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=60, Invalid=282, Unknown=0, NotChecked=0, Total=342 [2020-10-14 18:08:58,833 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2020-10-14 18:08:58,846 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 46. [2020-10-14 18:08:58,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-10-14 18:08:58,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 52 transitions. [2020-10-14 18:08:58,848 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 52 transitions. Word has length 31 [2020-10-14 18:08:58,848 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 18:08:58,848 INFO L479 AbstractCegarLoop]: Abstraction has 46 states and 52 transitions. [2020-10-14 18:08:58,848 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-14 18:08:58,848 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 52 transitions. [2020-10-14 18:08:58,849 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-10-14 18:08:58,849 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 18:08:58,850 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 18:08:58,850 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-14 18:08:58,850 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 18:08:58,850 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 18:08:58,851 INFO L82 PathProgramCache]: Analyzing trace with hash -728823226, now seen corresponding path program 1 times [2020-10-14 18:08:58,851 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 18:08:58,851 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [17868021] [2020-10-14 18:08:58,851 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 18:08:58,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:08:58,872 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:08:58,931 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:08:58,992 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:08:59,088 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:08:59,455 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:09:00,442 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:09:00,443 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 41 [2020-10-14 18:09:00,443 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-14 18:09:00,443 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1578 [2020-10-14 18:09:00,444 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:09:00,444 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:09:00,444 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-14 18:09:00,444 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-14 18:09:00,445 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 11 [2020-10-14 18:09:00,445 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 18:09:00,775 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 18:09:00,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:09:00,778 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:09:00,780 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:09:00,780 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 18:09:00,780 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:09:00,781 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-14 18:09:00,781 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:09:00,781 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:09:00,782 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:09:00,782 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:09:00,782 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:09:00,782 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 18:09:00,784 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-14 18:09:00,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:09:00,786 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:09:00,787 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:09:00,787 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-14 18:09:00,788 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:09:00,788 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 18:09:00,788 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:09:00,788 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:09:00,789 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:09:00,789 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:09:00,789 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:09:00,789 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 18:09:00,794 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 18:09:00,794 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [17868021] [2020-10-14 18:09:00,795 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 18:09:00,795 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-14 18:09:00,795 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1548429548] [2020-10-14 18:09:00,796 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-14 18:09:00,796 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 18:09:00,796 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-14 18:09:00,797 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2020-10-14 18:09:00,797 INFO L87 Difference]: Start difference. First operand 46 states and 52 transitions. Second operand 10 states. [2020-10-14 18:09:01,121 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 18:09:01,122 INFO L93 Difference]: Finished difference Result 69 states and 80 transitions. [2020-10-14 18:09:01,122 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-14 18:09:01,122 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 31 [2020-10-14 18:09:01,123 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 18:09:01,125 INFO L225 Difference]: With dead ends: 69 [2020-10-14 18:09:01,126 INFO L226 Difference]: Without dead ends: 55 [2020-10-14 18:09:01,126 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2020-10-14 18:09:01,127 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2020-10-14 18:09:01,135 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 55. [2020-10-14 18:09:01,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2020-10-14 18:09:01,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 63 transitions. [2020-10-14 18:09:01,137 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 63 transitions. Word has length 31 [2020-10-14 18:09:01,137 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 18:09:01,137 INFO L479 AbstractCegarLoop]: Abstraction has 55 states and 63 transitions. [2020-10-14 18:09:01,137 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-14 18:09:01,138 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 63 transitions. [2020-10-14 18:09:01,139 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-10-14 18:09:01,139 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 18:09:01,139 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 18:09:01,139 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-14 18:09:01,140 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 18:09:01,140 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 18:09:01,140 INFO L82 PathProgramCache]: Analyzing trace with hash 388345480, now seen corresponding path program 2 times [2020-10-14 18:09:01,141 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 18:09:01,141 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [909034931] [2020-10-14 18:09:01,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 18:09:01,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:09:01,156 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:09:01,177 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:09:01,567 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:09:01,567 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 43 [2020-10-14 18:09:01,567 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 18:09:01,568 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 415 [2020-10-14 18:09:01,568 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:09:01,568 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:09:01,568 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-14 18:09:01,568 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 24 [2020-10-14 18:09:01,569 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 11 [2020-10-14 18:09:01,569 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:09:01,620 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 18:09:01,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:09:01,623 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:09:01,624 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:09:01,624 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 18:09:01,625 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:09:01,625 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 18:09:01,625 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:09:01,625 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:09:01,625 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:09:01,626 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:09:01,626 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:09:01,626 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 18:09:01,627 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-14 18:09:01,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:09:01,629 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:09:01,630 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:09:01,630 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-14 18:09:01,630 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:09:01,630 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 18:09:01,631 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:09:01,631 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:09:01,631 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:09:01,631 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:09:01,632 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:09:01,632 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 18:09:01,634 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-14 18:09:01,635 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [909034931] [2020-10-14 18:09:01,635 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 18:09:01,635 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-14 18:09:01,635 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [842060712] [2020-10-14 18:09:01,636 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-14 18:09:01,636 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 18:09:01,636 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-14 18:09:01,637 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2020-10-14 18:09:01,637 INFO L87 Difference]: Start difference. First operand 55 states and 63 transitions. Second operand 8 states. [2020-10-14 18:09:01,962 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 18:09:01,962 INFO L93 Difference]: Finished difference Result 95 states and 111 transitions. [2020-10-14 18:09:01,963 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-14 18:09:01,963 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 33 [2020-10-14 18:09:01,963 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 18:09:01,964 INFO L225 Difference]: With dead ends: 95 [2020-10-14 18:09:01,964 INFO L226 Difference]: Without dead ends: 69 [2020-10-14 18:09:01,965 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=43, Invalid=113, Unknown=0, NotChecked=0, Total=156 [2020-10-14 18:09:01,966 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2020-10-14 18:09:01,973 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 59. [2020-10-14 18:09:01,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2020-10-14 18:09:01,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 67 transitions. [2020-10-14 18:09:01,975 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 67 transitions. Word has length 33 [2020-10-14 18:09:01,975 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 18:09:01,975 INFO L479 AbstractCegarLoop]: Abstraction has 59 states and 67 transitions. [2020-10-14 18:09:01,975 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-14 18:09:01,975 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 67 transitions. [2020-10-14 18:09:01,976 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-10-14 18:09:01,977 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 18:09:01,977 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 18:09:01,977 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-14 18:09:01,977 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 18:09:01,977 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 18:09:01,978 INFO L82 PathProgramCache]: Analyzing trace with hash -1041170080, now seen corresponding path program 2 times [2020-10-14 18:09:01,978 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 18:09:01,978 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2118838311] [2020-10-14 18:09:01,978 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 18:09:01,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:09:01,995 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:09:02,012 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:09:02,024 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:09:02,095 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:09:03,279 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:09:03,494 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:09:03,734 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:09:04,028 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:09:04,923 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:09:05,099 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:09:05,134 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:09:05,337 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:09:05,368 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:09:05,368 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 44 [2020-10-14 18:09:05,370 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 12 [2020-10-14 18:09:05,370 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3378 [2020-10-14 18:09:05,370 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:09:05,370 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:09:05,370 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-14 18:09:05,371 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-14 18:09:05,371 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-10-14 18:09:05,371 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 18:09:05,665 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 18:09:05,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:09:05,667 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:09:05,668 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:09:05,669 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 18:09:05,669 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:09:05,669 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 18:09:05,669 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:09:05,669 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:09:05,670 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:09:05,670 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:09:05,670 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:09:05,670 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:09:05,671 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-14 18:09:05,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:09:05,672 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:09:05,673 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:09:05,673 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-14 18:09:05,674 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:09:05,674 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 18:09:05,674 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:09:05,674 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:09:05,675 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:09:05,675 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:09:05,675 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:09:05,675 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 18:09:05,680 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 18:09:05,681 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2118838311] [2020-10-14 18:09:05,681 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 18:09:05,681 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-14 18:09:05,682 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1367114117] [2020-10-14 18:09:05,682 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-14 18:09:05,682 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 18:09:05,682 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-14 18:09:05,683 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=129, Unknown=0, NotChecked=0, Total=156 [2020-10-14 18:09:05,683 INFO L87 Difference]: Start difference. First operand 59 states and 67 transitions. Second operand 13 states. [2020-10-14 18:09:06,156 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 18:09:06,157 INFO L93 Difference]: Finished difference Result 85 states and 98 transitions. [2020-10-14 18:09:06,157 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-14 18:09:06,157 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 34 [2020-10-14 18:09:06,158 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 18:09:06,159 INFO L225 Difference]: With dead ends: 85 [2020-10-14 18:09:06,159 INFO L226 Difference]: Without dead ends: 83 [2020-10-14 18:09:06,160 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=63, Invalid=317, Unknown=0, NotChecked=0, Total=380 [2020-10-14 18:09:06,160 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2020-10-14 18:09:06,169 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 64. [2020-10-14 18:09:06,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-10-14 18:09:06,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 74 transitions. [2020-10-14 18:09:06,171 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 74 transitions. Word has length 34 [2020-10-14 18:09:06,171 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 18:09:06,171 INFO L479 AbstractCegarLoop]: Abstraction has 64 states and 74 transitions. [2020-10-14 18:09:06,171 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-14 18:09:06,171 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 74 transitions. [2020-10-14 18:09:06,172 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-10-14 18:09:06,172 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 18:09:06,172 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 18:09:06,173 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-14 18:09:06,173 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 18:09:06,173 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 18:09:06,173 INFO L82 PathProgramCache]: Analyzing trace with hash -911660900, now seen corresponding path program 1 times [2020-10-14 18:09:06,173 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 18:09:06,174 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1953505925] [2020-10-14 18:09:06,174 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 18:09:06,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:09:06,186 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:09:06,206 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:09:06,219 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:09:06,291 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:09:07,108 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:09:08,356 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:09:08,357 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 46 [2020-10-14 18:09:08,357 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-14 18:09:08,357 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2174 [2020-10-14 18:09:08,357 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:09:08,358 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:09:08,358 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-14 18:09:08,358 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-14 18:09:08,358 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 25 [2020-10-14 18:09:08,358 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:09:08,833 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 18:09:08,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:09:08,835 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:09:08,837 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:09:08,837 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 18:09:08,837 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:09:08,837 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 18:09:08,838 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:09:08,838 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:09:08,838 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:09:08,838 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:09:08,839 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:09:08,839 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 18:09:08,840 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-14 18:09:08,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:09:08,841 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:09:08,842 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:09:08,843 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-14 18:09:08,843 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:09:08,843 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 18:09:08,843 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:09:08,844 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:09:08,844 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:09:08,844 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:09:08,844 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:09:08,844 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 18:09:08,854 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 18:09:08,854 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1953505925] [2020-10-14 18:09:08,855 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 18:09:08,855 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-10-14 18:09:08,856 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1356396641] [2020-10-14 18:09:08,856 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-14 18:09:08,856 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 18:09:08,857 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-14 18:09:08,857 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=290, Unknown=0, NotChecked=0, Total=342 [2020-10-14 18:09:08,857 INFO L87 Difference]: Start difference. First operand 64 states and 74 transitions. Second operand 19 states. [2020-10-14 18:09:10,093 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 18:09:10,093 INFO L93 Difference]: Finished difference Result 124 states and 146 transitions. [2020-10-14 18:09:10,094 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-14 18:09:10,094 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 36 [2020-10-14 18:09:10,095 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 18:09:10,096 INFO L225 Difference]: With dead ends: 124 [2020-10-14 18:09:10,096 INFO L226 Difference]: Without dead ends: 97 [2020-10-14 18:09:10,098 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 219 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=175, Invalid=947, Unknown=0, NotChecked=0, Total=1122 [2020-10-14 18:09:10,098 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2020-10-14 18:09:10,108 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 77. [2020-10-14 18:09:10,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2020-10-14 18:09:10,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 92 transitions. [2020-10-14 18:09:10,109 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 92 transitions. Word has length 36 [2020-10-14 18:09:10,110 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 18:09:10,110 INFO L479 AbstractCegarLoop]: Abstraction has 77 states and 92 transitions. [2020-10-14 18:09:10,110 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-14 18:09:10,110 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 92 transitions. [2020-10-14 18:09:10,111 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-10-14 18:09:10,111 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 18:09:10,111 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 18:09:10,111 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-14 18:09:10,112 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 18:09:10,112 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 18:09:10,112 INFO L82 PathProgramCache]: Analyzing trace with hash -231602530, now seen corresponding path program 3 times [2020-10-14 18:09:10,112 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 18:09:10,113 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1199972505] [2020-10-14 18:09:10,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 18:09:10,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:09:10,127 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:09:10,146 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:09:10,447 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:09:10,447 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 46 [2020-10-14 18:09:10,448 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 18:09:10,448 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 324 [2020-10-14 18:09:10,448 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:09:10,448 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:09:10,448 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-14 18:09:10,449 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-14 18:09:10,449 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 15 [2020-10-14 18:09:10,449 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:09:10,510 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 18:09:10,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:09:10,512 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:09:10,513 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:09:10,514 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 18:09:10,514 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:09:10,515 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-14 18:09:10,515 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:09:10,515 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:09:10,516 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:09:10,516 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:09:10,516 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:09:10,517 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 18:09:10,518 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-14 18:09:10,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:09:10,520 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:09:10,521 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:09:10,522 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-14 18:09:10,522 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:09:10,522 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 18:09:10,522 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:09:10,522 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:09:10,523 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:09:10,523 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:09:10,524 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:09:10,524 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 18:09:10,528 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-14 18:09:10,529 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1199972505] [2020-10-14 18:09:10,529 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 18:09:10,529 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-14 18:09:10,530 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1500942519] [2020-10-14 18:09:10,530 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-14 18:09:10,531 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 18:09:10,531 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-14 18:09:10,531 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-10-14 18:09:10,531 INFO L87 Difference]: Start difference. First operand 77 states and 92 transitions. Second operand 8 states. [2020-10-14 18:09:10,819 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 18:09:10,819 INFO L93 Difference]: Finished difference Result 109 states and 127 transitions. [2020-10-14 18:09:10,820 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-14 18:09:10,820 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 36 [2020-10-14 18:09:10,821 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 18:09:10,821 INFO L225 Difference]: With dead ends: 109 [2020-10-14 18:09:10,822 INFO L226 Difference]: Without dead ends: 67 [2020-10-14 18:09:10,822 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2020-10-14 18:09:10,823 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2020-10-14 18:09:10,829 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 55. [2020-10-14 18:09:10,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2020-10-14 18:09:10,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 62 transitions. [2020-10-14 18:09:10,830 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 62 transitions. Word has length 36 [2020-10-14 18:09:10,830 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 18:09:10,831 INFO L479 AbstractCegarLoop]: Abstraction has 55 states and 62 transitions. [2020-10-14 18:09:10,831 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-14 18:09:10,831 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 62 transitions. [2020-10-14 18:09:10,832 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-10-14 18:09:10,832 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 18:09:10,832 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 18:09:10,832 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-14 18:09:10,832 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 18:09:10,833 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 18:09:10,833 INFO L82 PathProgramCache]: Analyzing trace with hash -1532793382, now seen corresponding path program 2 times [2020-10-14 18:09:10,833 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 18:09:10,834 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1338855444] [2020-10-14 18:09:10,834 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 18:09:10,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:09:10,853 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:09:10,882 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:09:10,939 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:09:11,120 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:09:11,262 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:09:11,370 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:09:11,458 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:09:11,817 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:09:11,925 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:09:11,990 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:09:12,133 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:09:12,237 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:09:14,179 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:09:14,239 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:09:14,454 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:09:14,657 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:09:14,723 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:09:15,846 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:09:15,847 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 48 [2020-10-14 18:09:15,847 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 17 [2020-10-14 18:09:15,847 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-14 18:09:15,847 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:09:15,847 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:09:15,848 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-14 18:09:15,848 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-14 18:09:15,848 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-14 18:09:15,848 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 18:09:15,891 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 18:09:15,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:09:15,893 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:09:15,894 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:09:15,895 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 18:09:15,895 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:09:15,895 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 18:09:15,895 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:09:15,895 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:09:15,896 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:09:15,896 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:09:15,896 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:09:15,896 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 18:09:15,897 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-14 18:09:15,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:09:15,898 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:09:15,899 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:09:15,899 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-14 18:09:15,900 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:09:15,900 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 18:09:15,900 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:09:15,900 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:09:15,900 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:09:15,901 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:09:15,901 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:09:15,901 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 18:09:15,904 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2020-10-14 18:09:15,904 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1338855444] [2020-10-14 18:09:15,904 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 18:09:15,905 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-14 18:09:15,905 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [404141287] [2020-10-14 18:09:15,905 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-14 18:09:15,905 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 18:09:15,906 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-14 18:09:15,906 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-10-14 18:09:15,906 INFO L87 Difference]: Start difference. First operand 55 states and 62 transitions. Second operand 7 states. [2020-10-14 18:09:16,056 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 18:09:16,057 INFO L93 Difference]: Finished difference Result 82 states and 96 transitions. [2020-10-14 18:09:16,057 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-14 18:09:16,057 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 38 [2020-10-14 18:09:16,058 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 18:09:16,059 INFO L225 Difference]: With dead ends: 82 [2020-10-14 18:09:16,059 INFO L226 Difference]: Without dead ends: 68 [2020-10-14 18:09:16,060 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2020-10-14 18:09:16,060 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2020-10-14 18:09:16,068 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 60. [2020-10-14 18:09:16,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2020-10-14 18:09:16,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 69 transitions. [2020-10-14 18:09:16,069 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 69 transitions. Word has length 38 [2020-10-14 18:09:16,069 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 18:09:16,069 INFO L479 AbstractCegarLoop]: Abstraction has 60 states and 69 transitions. [2020-10-14 18:09:16,069 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-14 18:09:16,070 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 69 transitions. [2020-10-14 18:09:16,070 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-10-14 18:09:16,070 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 18:09:16,071 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 18:09:16,071 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-14 18:09:16,071 INFO L427 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 18:09:16,071 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 18:09:16,072 INFO L82 PathProgramCache]: Analyzing trace with hash -852735012, now seen corresponding path program 4 times [2020-10-14 18:09:16,072 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 18:09:16,072 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [29958758] [2020-10-14 18:09:16,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 18:09:16,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:09:16,092 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:09:16,160 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:09:16,195 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:09:16,264 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:09:16,352 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:09:16,551 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:09:16,669 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:09:16,766 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:09:16,805 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:09:16,956 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:09:16,985 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:09:17,034 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:09:17,105 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:09:17,288 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:09:17,577 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:09:17,629 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:09:17,658 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:09:17,691 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:09:17,872 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:09:17,908 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:09:17,944 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:09:18,036 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:09:19,339 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:09:19,339 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 48 [2020-10-14 18:09:19,339 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 22 [2020-10-14 18:09:19,339 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3254 [2020-10-14 18:09:19,340 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:09:19,340 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:09:19,340 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-14 18:09:19,340 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-14 18:09:19,341 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-14 18:09:19,341 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 18:09:19,693 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 18:09:19,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:09:19,695 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:09:19,697 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:09:19,697 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 18:09:19,697 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:09:19,697 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 18:09:19,698 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:09:19,698 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:09:19,698 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:09:19,698 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:09:19,698 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:09:19,699 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 18:09:19,700 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-14 18:09:19,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:09:19,701 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:09:19,702 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:09:19,703 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-14 18:09:19,703 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:09:19,703 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 18:09:19,703 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:09:19,703 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:09:19,704 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:09:19,704 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:09:19,704 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:09:19,704 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:09:19,710 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 18:09:19,717 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [29958758] [2020-10-14 18:09:19,718 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 18:09:19,718 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-14 18:09:19,718 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1518832775] [2020-10-14 18:09:19,719 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-14 18:09:19,719 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 18:09:19,719 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-14 18:09:19,719 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=178, Unknown=0, NotChecked=0, Total=210 [2020-10-14 18:09:19,720 INFO L87 Difference]: Start difference. First operand 60 states and 69 transitions. Second operand 15 states. [2020-10-14 18:09:20,322 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 18:09:20,322 INFO L93 Difference]: Finished difference Result 108 states and 127 transitions. [2020-10-14 18:09:20,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-14 18:09:20,323 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 38 [2020-10-14 18:09:20,323 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 18:09:20,324 INFO L225 Difference]: With dead ends: 108 [2020-10-14 18:09:20,324 INFO L226 Difference]: Without dead ends: 83 [2020-10-14 18:09:20,325 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=69, Invalid=393, Unknown=0, NotChecked=0, Total=462 [2020-10-14 18:09:20,325 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2020-10-14 18:09:20,336 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 73. [2020-10-14 18:09:20,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2020-10-14 18:09:20,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 85 transitions. [2020-10-14 18:09:20,338 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 85 transitions. Word has length 38 [2020-10-14 18:09:20,338 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 18:09:20,338 INFO L479 AbstractCegarLoop]: Abstraction has 73 states and 85 transitions. [2020-10-14 18:09:20,338 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-14 18:09:20,338 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 85 transitions. [2020-10-14 18:09:20,339 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-10-14 18:09:20,339 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 18:09:20,339 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 18:09:20,339 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-14 18:09:20,340 INFO L427 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 18:09:20,340 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 18:09:20,340 INFO L82 PathProgramCache]: Analyzing trace with hash 775924058, now seen corresponding path program 5 times [2020-10-14 18:09:20,340 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 18:09:20,340 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1738238106] [2020-10-14 18:09:20,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 18:09:20,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:09:20,352 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:09:20,363 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:09:21,150 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:09:21,150 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 50 [2020-10-14 18:09:21,150 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 18:09:21,151 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 801 [2020-10-14 18:09:21,151 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:09:21,151 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:09:21,151 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-14 18:09:21,151 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 26 [2020-10-14 18:09:21,151 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-14 18:09:21,152 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:09:21,218 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 18:09:21,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:09:21,220 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:09:21,222 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:09:21,222 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 18:09:21,222 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:09:21,222 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-14 18:09:21,222 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:09:21,223 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:09:21,223 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:09:21,223 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:09:21,223 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:09:21,223 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 18:09:21,224 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-14 18:09:21,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:09:21,225 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:09:21,226 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:09:21,226 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-14 18:09:21,227 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:09:21,227 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 18:09:21,227 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:09:21,227 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:09:21,227 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:09:21,228 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:09:21,228 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:09:21,228 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:09:21,230 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 4 proven. 10 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-14 18:09:21,231 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1738238106] [2020-10-14 18:09:21,231 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 18:09:21,231 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-14 18:09:21,231 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [13042319] [2020-10-14 18:09:21,232 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-14 18:09:21,232 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 18:09:21,232 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-14 18:09:21,232 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2020-10-14 18:09:21,233 INFO L87 Difference]: Start difference. First operand 73 states and 85 transitions. Second operand 10 states. [2020-10-14 18:09:21,732 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 18:09:21,732 INFO L93 Difference]: Finished difference Result 135 states and 154 transitions. [2020-10-14 18:09:21,732 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-14 18:09:21,733 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 40 [2020-10-14 18:09:21,733 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 18:09:21,734 INFO L225 Difference]: With dead ends: 135 [2020-10-14 18:09:21,735 INFO L226 Difference]: Without dead ends: 106 [2020-10-14 18:09:21,736 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=70, Invalid=202, Unknown=0, NotChecked=0, Total=272 [2020-10-14 18:09:21,736 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2020-10-14 18:09:21,745 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 82. [2020-10-14 18:09:21,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2020-10-14 18:09:21,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 93 transitions. [2020-10-14 18:09:21,746 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 93 transitions. Word has length 40 [2020-10-14 18:09:21,746 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 18:09:21,746 INFO L479 AbstractCegarLoop]: Abstraction has 82 states and 93 transitions. [2020-10-14 18:09:21,746 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-14 18:09:21,746 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 93 transitions. [2020-10-14 18:09:21,747 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-10-14 18:09:21,747 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 18:09:21,748 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 18:09:21,748 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-14 18:09:21,748 INFO L427 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 18:09:21,748 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 18:09:21,748 INFO L82 PathProgramCache]: Analyzing trace with hash -1840415864, now seen corresponding path program 3 times [2020-10-14 18:09:21,749 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 18:09:21,749 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [184072313] [2020-10-14 18:09:21,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 18:09:21,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:09:21,763 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:09:21,782 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:09:21,792 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:09:21,962 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:09:22,030 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:09:23,469 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:09:23,501 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:09:23,594 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:09:24,554 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:09:24,767 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:09:24,798 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:09:24,941 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:09:26,213 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:09:26,759 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:09:26,759 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 51 [2020-10-14 18:09:26,760 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 13 [2020-10-14 18:09:26,760 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-14 18:09:26,760 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:09:26,760 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:09:26,761 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-14 18:09:26,761 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-14 18:09:26,761 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-14 18:09:26,761 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 18:09:27,033 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 18:09:27,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:09:27,036 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:09:27,037 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:09:27,037 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 18:09:27,037 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:09:27,038 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 18:09:27,038 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:09:27,038 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:09:27,038 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:09:27,038 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:09:27,039 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:09:27,039 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:09:27,040 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-14 18:09:27,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:09:27,041 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:09:27,041 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:09:27,042 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-14 18:09:27,042 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:09:27,042 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 18:09:27,042 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:09:27,042 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:09:27,043 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:09:27,043 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:09:27,043 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:09:27,043 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:09:27,050 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-14 18:09:27,051 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [184072313] [2020-10-14 18:09:27,051 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 18:09:27,051 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-14 18:09:27,052 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [816382097] [2020-10-14 18:09:27,052 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-14 18:09:27,052 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 18:09:27,052 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-14 18:09:27,053 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=202, Unknown=0, NotChecked=0, Total=240 [2020-10-14 18:09:27,053 INFO L87 Difference]: Start difference. First operand 82 states and 93 transitions. Second operand 16 states. [2020-10-14 18:09:27,576 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 18:09:27,576 INFO L93 Difference]: Finished difference Result 102 states and 115 transitions. [2020-10-14 18:09:27,577 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-14 18:09:27,577 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 41 [2020-10-14 18:09:27,577 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 18:09:27,578 INFO L225 Difference]: With dead ends: 102 [2020-10-14 18:09:27,578 INFO L226 Difference]: Without dead ends: 100 [2020-10-14 18:09:27,579 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 5 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=74, Invalid=388, Unknown=0, NotChecked=0, Total=462 [2020-10-14 18:09:27,580 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2020-10-14 18:09:27,588 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 84. [2020-10-14 18:09:27,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2020-10-14 18:09:27,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 95 transitions. [2020-10-14 18:09:27,589 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 95 transitions. Word has length 41 [2020-10-14 18:09:27,590 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 18:09:27,590 INFO L479 AbstractCegarLoop]: Abstraction has 84 states and 95 transitions. [2020-10-14 18:09:27,590 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-14 18:09:27,590 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 95 transitions. [2020-10-14 18:09:27,591 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-10-14 18:09:27,591 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 18:09:27,591 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 18:09:27,591 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-14 18:09:27,592 INFO L427 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 18:09:27,592 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 18:09:27,592 INFO L82 PathProgramCache]: Analyzing trace with hash 1249723020, now seen corresponding path program 6 times [2020-10-14 18:09:27,592 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 18:09:27,592 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1821232681] [2020-10-14 18:09:27,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 18:09:27,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:09:27,602 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:09:27,614 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:09:28,133 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:09:28,134 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 53 [2020-10-14 18:09:28,134 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 18:09:28,134 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 534 [2020-10-14 18:09:28,134 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:09:28,134 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:09:28,135 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-14 18:09:28,135 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-14 18:09:28,135 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-14 18:09:28,135 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:09:28,199 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 18:09:28,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:09:28,201 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:09:28,202 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:09:28,202 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 18:09:28,202 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:09:28,202 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 18:09:28,202 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:09:28,202 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:09:28,203 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:09:28,203 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:09:28,203 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:09:28,203 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:09:28,204 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-14 18:09:28,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:09:28,205 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:09:28,206 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:09:28,206 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-14 18:09:28,206 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:09:28,206 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 18:09:28,206 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:09:28,207 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:09:28,207 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:09:28,207 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:09:28,207 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:09:28,207 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:09:28,210 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 12 proven. 4 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-10-14 18:09:28,211 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1821232681] [2020-10-14 18:09:28,211 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 18:09:28,211 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-14 18:09:28,211 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1139583115] [2020-10-14 18:09:28,212 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-14 18:09:28,212 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 18:09:28,212 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-14 18:09:28,212 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2020-10-14 18:09:28,212 INFO L87 Difference]: Start difference. First operand 84 states and 95 transitions. Second operand 10 states. [2020-10-14 18:09:28,550 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 18:09:28,550 INFO L93 Difference]: Finished difference Result 171 states and 194 transitions. [2020-10-14 18:09:28,553 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-14 18:09:28,553 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 43 [2020-10-14 18:09:28,553 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 18:09:28,554 INFO L225 Difference]: With dead ends: 171 [2020-10-14 18:09:28,555 INFO L226 Difference]: Without dead ends: 119 [2020-10-14 18:09:28,556 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182 [2020-10-14 18:09:28,558 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2020-10-14 18:09:28,579 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 97. [2020-10-14 18:09:28,579 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2020-10-14 18:09:28,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 106 transitions. [2020-10-14 18:09:28,583 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 106 transitions. Word has length 43 [2020-10-14 18:09:28,584 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 18:09:28,584 INFO L479 AbstractCegarLoop]: Abstraction has 97 states and 106 transitions. [2020-10-14 18:09:28,584 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-14 18:09:28,584 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 106 transitions. [2020-10-14 18:09:28,587 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-10-14 18:09:28,587 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 18:09:28,587 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 18:09:28,587 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-14 18:09:28,588 INFO L427 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 18:09:28,588 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 18:09:28,588 INFO L82 PathProgramCache]: Analyzing trace with hash -2092450446, now seen corresponding path program 1 times [2020-10-14 18:09:28,588 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 18:09:28,589 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2132993274] [2020-10-14 18:09:28,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 18:09:28,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:09:28,613 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:09:28,678 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:09:28,794 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:09:28,906 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:09:29,114 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:09:29,145 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:09:29,288 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:09:29,440 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:09:29,535 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:09:29,636 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:09:29,881 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:09:30,036 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:09:30,168 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:09:30,339 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:09:30,390 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:09:30,680 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:09:30,810 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:09:30,877 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:09:30,940 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:09:30,993 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:09:31,096 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:09:31,147 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:09:31,275 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:09:31,383 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:09:31,678 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:09:31,966 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:09:32,207 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:09:32,898 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:09:33,049 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:09:33,194 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:09:33,362 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:09:33,519 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:09:33,609 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:09:33,610 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 58 [2020-10-14 18:09:33,610 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 32 [2020-10-14 18:09:33,610 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-10-14 18:09:33,610 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:09:33,610 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:09:33,611 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-14 18:09:33,611 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-14 18:09:33,611 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 37 [2020-10-14 18:09:33,611 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:09:33,949 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 18:09:33,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:09:33,951 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:09:33,952 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:09:33,952 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 18:09:33,953 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:09:33,953 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-14 18:09:33,953 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:09:33,953 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:09:33,953 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:09:33,954 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:09:33,954 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:09:33,954 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:09:33,955 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-14 18:09:33,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:09:33,958 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:09:33,959 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:09:33,959 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-14 18:09:33,960 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:09:33,960 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-14 18:09:33,960 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:09:33,960 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:09:33,960 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:09:33,961 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:09:33,961 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:09:33,961 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:09:33,964 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2020-10-14 18:09:33,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:09:33,966 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:09:33,967 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:09:33,967 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-14 18:09:33,968 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:09:33,968 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 18:09:33,968 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:09:33,968 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:09:33,968 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 18:09:33,968 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:09:33,969 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-14 18:09:33,969 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:09:33,979 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 2 proven. 14 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-14 18:09:33,979 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2132993274] [2020-10-14 18:09:33,979 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 18:09:33,979 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-14 18:09:33,980 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [341897475] [2020-10-14 18:09:33,980 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-14 18:09:33,981 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 18:09:33,981 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-14 18:09:33,982 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=181, Unknown=0, NotChecked=0, Total=210 [2020-10-14 18:09:33,982 INFO L87 Difference]: Start difference. First operand 97 states and 106 transitions. Second operand 15 states. [2020-10-14 18:09:34,580 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 18:09:34,581 INFO L93 Difference]: Finished difference Result 100 states and 109 transitions. [2020-10-14 18:09:34,581 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-14 18:09:34,581 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 46 [2020-10-14 18:09:34,582 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 18:09:34,582 INFO L225 Difference]: With dead ends: 100 [2020-10-14 18:09:34,582 INFO L226 Difference]: Without dead ends: 71 [2020-10-14 18:09:34,583 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=76, Invalid=476, Unknown=0, NotChecked=0, Total=552 [2020-10-14 18:09:34,584 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2020-10-14 18:09:34,595 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 70. [2020-10-14 18:09:34,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2020-10-14 18:09:34,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 78 transitions. [2020-10-14 18:09:34,596 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 78 transitions. Word has length 46 [2020-10-14 18:09:34,597 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 18:09:34,597 INFO L479 AbstractCegarLoop]: Abstraction has 70 states and 78 transitions. [2020-10-14 18:09:34,597 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-14 18:09:34,597 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 78 transitions. [2020-10-14 18:09:34,598 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-10-14 18:09:34,598 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 18:09:34,598 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 18:09:34,599 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-14 18:09:34,599 INFO L427 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 18:09:34,599 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 18:09:34,599 INFO L82 PathProgramCache]: Analyzing trace with hash -605799538, now seen corresponding path program 7 times [2020-10-14 18:09:34,599 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 18:09:34,600 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [501273135] [2020-10-14 18:09:34,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 18:09:34,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:09:34,620 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:09:34,700 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:09:34,807 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:09:34,947 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:09:35,057 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:09:35,254 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:09:35,356 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:09:35,423 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:09:35,518 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:09:35,641 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:09:35,694 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:09:35,746 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:09:35,847 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:09:35,975 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:09:36,304 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:09:36,388 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:09:36,511 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:09:36,551 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:09:36,636 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:09:36,691 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:09:36,796 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:09:36,919 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:09:36,952 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:09:37,061 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:09:37,137 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:09:37,225 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:09:37,277 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:09:37,505 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:09:37,613 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:09:37,697 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:09:37,737 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:09:37,791 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:09:38,562 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:09:38,607 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:09:38,725 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:09:39,070 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:09:39,105 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:09:39,221 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:09:39,303 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:09:39,375 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:09:39,437 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:09:39,519 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:09:39,622 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:09:39,622 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 55 [2020-10-14 18:09:39,622 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 42 [2020-10-14 18:09:39,622 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5006 [2020-10-14 18:09:39,623 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:09:39,623 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:09:39,623 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-14 18:09:39,623 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-14 18:09:39,623 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-14 18:09:39,623 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:09:40,340 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 18:09:40,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:09:40,342 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:09:40,343 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:09:40,343 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 18:09:40,343 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:09:40,344 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 18:09:40,344 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:09:40,344 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:09:40,344 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:09:40,344 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:09:40,344 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:09:40,345 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:09:40,346 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-14 18:09:40,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:09:40,347 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:09:40,347 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:09:40,348 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-14 18:09:40,348 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:09:40,348 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 18:09:40,348 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:09:40,348 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:09:40,348 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:09:40,349 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:09:40,349 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:09:40,349 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:09:40,359 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 8 proven. 20 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-14 18:09:40,359 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [501273135] [2020-10-14 18:09:40,360 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 18:09:40,360 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-10-14 18:09:40,360 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [769949707] [2020-10-14 18:09:40,361 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-14 18:09:40,361 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 18:09:40,361 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-14 18:09:40,361 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=302, Unknown=0, NotChecked=0, Total=342 [2020-10-14 18:09:40,362 INFO L87 Difference]: Start difference. First operand 70 states and 78 transitions. Second operand 19 states. [2020-10-14 18:09:41,125 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 18:09:41,125 INFO L93 Difference]: Finished difference Result 130 states and 148 transitions. [2020-10-14 18:09:41,126 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-14 18:09:41,126 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 45 [2020-10-14 18:09:41,126 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 18:09:41,127 INFO L225 Difference]: With dead ends: 130 [2020-10-14 18:09:41,127 INFO L226 Difference]: Without dead ends: 99 [2020-10-14 18:09:41,128 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=65, Invalid=487, Unknown=0, NotChecked=0, Total=552 [2020-10-14 18:09:41,129 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2020-10-14 18:09:41,137 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 91. [2020-10-14 18:09:41,137 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2020-10-14 18:09:41,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 102 transitions. [2020-10-14 18:09:41,138 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 102 transitions. Word has length 45 [2020-10-14 18:09:41,138 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 18:09:41,138 INFO L479 AbstractCegarLoop]: Abstraction has 91 states and 102 transitions. [2020-10-14 18:09:41,138 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-14 18:09:41,139 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 102 transitions. [2020-10-14 18:09:41,139 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-10-14 18:09:41,139 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 18:09:41,139 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 18:09:41,139 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-14 18:09:41,140 INFO L427 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 18:09:41,140 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 18:09:41,140 INFO L82 PathProgramCache]: Analyzing trace with hash -91528112, now seen corresponding path program 8 times [2020-10-14 18:09:41,140 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 18:09:41,140 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [74688758] [2020-10-14 18:09:41,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 18:09:41,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:09:41,154 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:09:41,163 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:09:42,348 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:09:42,348 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 57 [2020-10-14 18:09:42,348 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 18:09:42,348 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1199 [2020-10-14 18:09:42,349 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:09:42,349 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:09:42,349 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-14 18:09:42,349 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 28 [2020-10-14 18:09:42,349 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 21 [2020-10-14 18:09:42,349 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:09:42,429 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 18:09:42,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:09:42,430 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:09:42,431 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:09:42,432 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 18:09:42,432 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:09:42,432 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 18:09:42,432 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:09:42,432 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:09:42,432 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:09:42,433 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:09:42,433 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:09:42,433 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:09:42,433 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-14 18:09:42,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:09:42,434 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:09:42,435 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:09:42,435 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-14 18:09:42,435 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:09:42,435 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 18:09:42,435 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:09:42,435 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:09:42,435 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:09:42,435 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:09:42,435 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:09:42,436 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:09:42,438 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 9 proven. 19 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-10-14 18:09:42,438 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [74688758] [2020-10-14 18:09:42,438 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 18:09:42,439 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-14 18:09:42,439 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1062616780] [2020-10-14 18:09:42,439 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-14 18:09:42,439 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 18:09:42,440 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-14 18:09:42,440 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2020-10-14 18:09:42,440 INFO L87 Difference]: Start difference. First operand 91 states and 102 transitions. Second operand 12 states. [2020-10-14 18:09:43,101 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 18:09:43,101 INFO L93 Difference]: Finished difference Result 184 states and 211 transitions. [2020-10-14 18:09:43,101 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-14 18:09:43,102 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 47 [2020-10-14 18:09:43,102 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 18:09:43,103 INFO L225 Difference]: With dead ends: 184 [2020-10-14 18:09:43,103 INFO L226 Difference]: Without dead ends: 142 [2020-10-14 18:09:43,104 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=104, Invalid=316, Unknown=0, NotChecked=0, Total=420 [2020-10-14 18:09:43,104 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2020-10-14 18:09:43,113 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 102. [2020-10-14 18:09:43,114 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 102 states. [2020-10-14 18:09:43,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 114 transitions. [2020-10-14 18:09:43,114 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 114 transitions. Word has length 47 [2020-10-14 18:09:43,115 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 18:09:43,115 INFO L479 AbstractCegarLoop]: Abstraction has 102 states and 114 transitions. [2020-10-14 18:09:43,115 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-14 18:09:43,115 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 114 transitions. [2020-10-14 18:09:43,115 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2020-10-14 18:09:43,116 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 18:09:43,116 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 18:09:43,116 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-14 18:09:43,116 INFO L427 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 18:09:43,116 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 18:09:43,116 INFO L82 PathProgramCache]: Analyzing trace with hash 1800346582, now seen corresponding path program 9 times [2020-10-14 18:09:43,116 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 18:09:43,117 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [664832906] [2020-10-14 18:09:43,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 18:09:43,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:09:43,131 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:09:43,161 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:09:44,108 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:09:44,109 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 60 [2020-10-14 18:09:44,109 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 18:09:44,109 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 982 [2020-10-14 18:09:44,109 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:09:44,109 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:09:44,109 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-14 18:09:44,110 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-14 18:09:44,110 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 29 [2020-10-14 18:09:44,110 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:09:44,193 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 18:09:44,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:09:44,195 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:09:44,196 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:09:44,196 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 18:09:44,196 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:09:44,196 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 18:09:44,197 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:09:44,197 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:09:44,197 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:09:44,197 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:09:44,197 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:09:44,198 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:09:44,200 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-14 18:09:44,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:09:44,201 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:09:44,203 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:09:44,203 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-14 18:09:44,204 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:09:44,204 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-14 18:09:44,204 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:09:44,204 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:09:44,204 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:09:44,204 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:09:44,205 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:09:44,205 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:09:44,208 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 22 proven. 9 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2020-10-14 18:09:44,208 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [664832906] [2020-10-14 18:09:44,208 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 18:09:44,208 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-14 18:09:44,209 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1220245046] [2020-10-14 18:09:44,209 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-14 18:09:44,209 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 18:09:44,210 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-14 18:09:44,210 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2020-10-14 18:09:44,210 INFO L87 Difference]: Start difference. First operand 102 states and 114 transitions. Second operand 12 states. [2020-10-14 18:09:44,628 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 18:09:44,629 INFO L93 Difference]: Finished difference Result 206 states and 233 transitions. [2020-10-14 18:09:44,629 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-14 18:09:44,629 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 50 [2020-10-14 18:09:44,630 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 18:09:44,631 INFO L225 Difference]: With dead ends: 206 [2020-10-14 18:09:44,632 INFO L226 Difference]: Without dead ends: 147 [2020-10-14 18:09:44,633 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=69, Invalid=203, Unknown=0, NotChecked=0, Total=272 [2020-10-14 18:09:44,634 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2020-10-14 18:09:44,645 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 121. [2020-10-14 18:09:44,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 121 states. [2020-10-14 18:09:44,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 132 transitions. [2020-10-14 18:09:44,646 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 132 transitions. Word has length 50 [2020-10-14 18:09:44,646 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 18:09:44,646 INFO L479 AbstractCegarLoop]: Abstraction has 121 states and 132 transitions. [2020-10-14 18:09:44,646 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-14 18:09:44,646 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 132 transitions. [2020-10-14 18:09:44,647 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-10-14 18:09:44,647 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 18:09:44,647 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 18:09:44,647 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-14 18:09:44,647 INFO L427 AbstractCegarLoop]: === Iteration 17 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 18:09:44,647 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 18:09:44,647 INFO L82 PathProgramCache]: Analyzing trace with hash 1372760226, now seen corresponding path program 2 times [2020-10-14 18:09:44,647 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 18:09:44,648 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [58897854] [2020-10-14 18:09:44,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 18:09:44,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:09:44,663 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:09:44,752 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:09:44,894 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:09:45,314 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:09:45,627 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:09:45,796 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:09:46,011 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:09:46,152 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:09:46,316 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:09:46,421 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:09:47,238 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:09:47,783 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:09:48,325 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:09:48,817 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:09:48,907 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:09:49,035 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:09:49,373 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:09:49,481 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:09:49,535 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:09:49,648 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:09:49,708 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:09:49,708 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 65 [2020-10-14 18:09:49,708 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 20 [2020-10-14 18:09:49,708 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5051 [2020-10-14 18:09:49,708 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:09:49,709 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:09:49,709 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 19 [2020-10-14 18:09:49,709 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-14 18:09:49,709 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 44 [2020-10-14 18:09:49,709 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:09:50,184 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 18:09:50,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:09:50,187 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:09:50,188 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:09:50,189 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 18:09:50,189 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:09:50,189 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-14 18:09:50,190 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:09:50,190 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:09:50,190 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:09:50,191 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:09:50,191 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:09:50,191 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 18:09:50,193 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-14 18:09:50,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:09:50,194 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:09:50,195 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:09:50,195 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-14 18:09:50,196 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:09:50,196 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 18:09:50,196 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:09:50,197 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:09:50,197 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:09:50,197 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:09:50,198 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:09:50,198 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 18:09:50,199 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2020-10-14 18:09:50,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:09:50,201 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:09:50,204 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:09:50,204 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-14 18:09:50,205 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:09:50,205 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-14 18:09:50,205 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:09:50,205 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:09:50,206 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 18:09:50,206 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:09:50,206 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-14 18:09:50,207 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 18:09:50,219 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 26 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-10-14 18:09:50,220 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [58897854] [2020-10-14 18:09:50,220 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 18:09:50,220 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-14 18:09:50,220 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [609613503] [2020-10-14 18:09:50,221 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-14 18:09:50,221 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 18:09:50,222 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-14 18:09:50,222 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=235, Unknown=0, NotChecked=0, Total=272 [2020-10-14 18:09:50,222 INFO L87 Difference]: Start difference. First operand 121 states and 132 transitions. Second operand 17 states. [2020-10-14 18:09:51,062 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 18:09:51,063 INFO L93 Difference]: Finished difference Result 132 states and 143 transitions. [2020-10-14 18:09:51,063 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-14 18:09:51,063 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 53 [2020-10-14 18:09:51,063 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 18:09:51,064 INFO L225 Difference]: With dead ends: 132 [2020-10-14 18:09:51,064 INFO L226 Difference]: Without dead ends: 128 [2020-10-14 18:09:51,065 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=87, Invalid=563, Unknown=0, NotChecked=0, Total=650 [2020-10-14 18:09:51,065 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2020-10-14 18:09:51,075 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 123. [2020-10-14 18:09:51,075 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 123 states. [2020-10-14 18:09:51,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 133 transitions. [2020-10-14 18:09:51,076 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 133 transitions. Word has length 53 [2020-10-14 18:09:51,076 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 18:09:51,076 INFO L479 AbstractCegarLoop]: Abstraction has 123 states and 133 transitions. [2020-10-14 18:09:51,076 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-14 18:09:51,076 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 133 transitions. [2020-10-14 18:09:51,076 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-10-14 18:09:51,076 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 18:09:51,077 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 18:09:51,077 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-14 18:09:51,077 INFO L427 AbstractCegarLoop]: === Iteration 18 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 18:09:51,077 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 18:09:51,077 INFO L82 PathProgramCache]: Analyzing trace with hash 1871731860, now seen corresponding path program 10 times [2020-10-14 18:09:51,077 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 18:09:51,077 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [576048423] [2020-10-14 18:09:51,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 18:09:51,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:09:51,099 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:09:51,220 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:09:51,488 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:09:51,623 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:09:51,746 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:09:51,843 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:09:52,247 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:09:52,754 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:09:53,229 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:09:53,314 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:09:53,480 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:09:53,575 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:09:53,791 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:09:53,933 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:09:54,009 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:09:54,111 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:09:54,189 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:09:54,314 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:09:54,413 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:09:54,502 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:09:54,640 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:09:54,983 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:09:55,040 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:09:55,209 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:09:55,285 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:09:55,350 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:09:55,416 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:09:55,523 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:09:55,664 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:09:55,697 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:09:55,784 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:09:55,893 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:09:55,989 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:09:56,010 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:09:56,094 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:09:56,094 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 62 [2020-10-14 18:09:56,094 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 34 [2020-10-14 18:09:56,094 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-14 18:09:56,094 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:09:56,095 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:09:56,095 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 22 [2020-10-14 18:09:56,095 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-14 18:09:56,095 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 29 [2020-10-14 18:09:56,095 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:09:56,988 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 18:09:56,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:09:56,991 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:09:56,991 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:09:56,991 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 18:09:56,992 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:09:56,992 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 18:09:56,992 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:09:56,992 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:09:56,992 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:09:56,992 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:09:56,992 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:09:56,992 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:09:56,993 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-14 18:09:56,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:09:56,994 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:09:56,995 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:09:56,995 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-14 18:09:56,995 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:09:56,995 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 18:09:56,996 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:09:56,996 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:09:56,996 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:09:56,996 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:09:56,996 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:09:56,996 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:09:57,006 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 13 proven. 37 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-14 18:09:57,006 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [576048423] [2020-10-14 18:09:57,006 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 18:09:57,007 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-10-14 18:09:57,007 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2002675263] [2020-10-14 18:09:57,007 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-14 18:09:57,007 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 18:09:57,008 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-14 18:09:57,008 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=447, Unknown=0, NotChecked=0, Total=506 [2020-10-14 18:09:57,008 INFO L87 Difference]: Start difference. First operand 123 states and 133 transitions. Second operand 23 states. [2020-10-14 18:09:58,523 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 18:09:58,524 INFO L93 Difference]: Finished difference Result 185 states and 205 transitions. [2020-10-14 18:09:58,525 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-14 18:09:58,525 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 52 [2020-10-14 18:09:58,525 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 18:09:58,527 INFO L225 Difference]: With dead ends: 185 [2020-10-14 18:09:58,530 INFO L226 Difference]: Without dead ends: 148 [2020-10-14 18:09:58,531 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 222 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=147, Invalid=1185, Unknown=0, NotChecked=0, Total=1332 [2020-10-14 18:09:58,532 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2020-10-14 18:09:58,563 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 139. [2020-10-14 18:09:58,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 139 states. [2020-10-14 18:09:58,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 151 transitions. [2020-10-14 18:09:58,566 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 151 transitions. Word has length 52 [2020-10-14 18:09:58,566 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 18:09:58,567 INFO L479 AbstractCegarLoop]: Abstraction has 139 states and 151 transitions. [2020-10-14 18:09:58,567 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-14 18:09:58,567 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 151 transitions. [2020-10-14 18:09:58,575 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-10-14 18:09:58,575 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 18:09:58,575 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 18:09:58,576 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-14 18:09:58,576 INFO L427 AbstractCegarLoop]: === Iteration 19 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 18:09:58,576 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 18:09:58,576 INFO L82 PathProgramCache]: Analyzing trace with hash -488561262, now seen corresponding path program 11 times [2020-10-14 18:09:58,576 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 18:09:58,577 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1572351427] [2020-10-14 18:09:58,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 18:09:58,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:09:58,593 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:09:58,621 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:10:00,910 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:10:00,910 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 64 [2020-10-14 18:10:00,910 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 18:10:00,910 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2322 [2020-10-14 18:10:00,910 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:10:00,910 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:10:00,910 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-14 18:10:00,911 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 30 [2020-10-14 18:10:00,911 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-14 18:10:00,911 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:10:01,016 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 18:10:01,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:10:01,017 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:10:01,018 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:10:01,019 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 18:10:01,019 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:10:01,019 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 18:10:01,019 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:10:01,019 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:10:01,019 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:10:01,020 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:10:01,020 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:10:01,020 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:10:01,021 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-14 18:10:01,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:10:01,022 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:10:01,022 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:10:01,023 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-14 18:10:01,023 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:10:01,023 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 18:10:01,023 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:10:01,023 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:10:01,024 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:10:01,024 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:10:01,024 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:10:01,024 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:10:01,028 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 16 proven. 31 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2020-10-14 18:10:01,028 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1572351427] [2020-10-14 18:10:01,028 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 18:10:01,028 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-14 18:10:01,029 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [180718336] [2020-10-14 18:10:01,029 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-14 18:10:01,029 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 18:10:01,029 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-14 18:10:01,030 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2020-10-14 18:10:01,030 INFO L87 Difference]: Start difference. First operand 139 states and 151 transitions. Second operand 14 states. [2020-10-14 18:10:02,006 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 18:10:02,006 INFO L93 Difference]: Finished difference Result 240 states and 266 transitions. [2020-10-14 18:10:02,007 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-14 18:10:02,007 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 54 [2020-10-14 18:10:02,007 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 18:10:02,009 INFO L225 Difference]: With dead ends: 240 [2020-10-14 18:10:02,009 INFO L226 Difference]: Without dead ends: 208 [2020-10-14 18:10:02,009 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=145, Invalid=455, Unknown=0, NotChecked=0, Total=600 [2020-10-14 18:10:02,010 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 208 states. [2020-10-14 18:10:02,028 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 208 to 160. [2020-10-14 18:10:02,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 160 states. [2020-10-14 18:10:02,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 174 transitions. [2020-10-14 18:10:02,029 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 174 transitions. Word has length 54 [2020-10-14 18:10:02,029 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 18:10:02,029 INFO L479 AbstractCegarLoop]: Abstraction has 160 states and 174 transitions. [2020-10-14 18:10:02,029 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-14 18:10:02,030 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 174 transitions. [2020-10-14 18:10:02,030 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-10-14 18:10:02,030 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 18:10:02,031 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 18:10:02,031 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-14 18:10:02,031 INFO L427 AbstractCegarLoop]: === Iteration 20 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 18:10:02,031 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 18:10:02,031 INFO L82 PathProgramCache]: Analyzing trace with hash 2125708116, now seen corresponding path program 12 times [2020-10-14 18:10:02,032 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 18:10:02,032 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [974284966] [2020-10-14 18:10:02,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 18:10:02,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:10:02,049 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:10:02,079 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:10:03,758 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:10:03,758 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 67 [2020-10-14 18:10:03,758 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 18:10:03,758 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1714 [2020-10-14 18:10:03,758 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:10:03,758 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:10:03,758 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-14 18:10:03,759 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-14 18:10:03,759 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 36 [2020-10-14 18:10:03,759 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:10:03,858 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 18:10:03,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:10:03,860 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:10:03,861 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:10:03,861 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 18:10:03,861 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:10:03,861 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 18:10:03,861 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:10:03,862 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:10:03,862 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:10:03,862 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:10:03,862 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:10:03,862 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:10:03,863 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-14 18:10:03,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:10:03,863 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:10:03,864 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:10:03,864 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-14 18:10:03,864 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:10:03,864 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 18:10:03,864 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:10:03,864 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:10:03,865 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:10:03,865 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:10:03,865 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:10:03,865 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:10:03,868 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 35 proven. 16 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2020-10-14 18:10:03,869 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [974284966] [2020-10-14 18:10:03,869 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 18:10:03,869 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-14 18:10:03,869 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [980872179] [2020-10-14 18:10:03,870 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-14 18:10:03,870 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 18:10:03,870 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-14 18:10:03,870 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2020-10-14 18:10:03,871 INFO L87 Difference]: Start difference. First operand 160 states and 174 transitions. Second operand 14 states. [2020-10-14 18:10:04,507 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 18:10:04,508 INFO L93 Difference]: Finished difference Result 281 states and 313 transitions. [2020-10-14 18:10:04,508 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-14 18:10:04,508 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 57 [2020-10-14 18:10:04,509 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 18:10:04,510 INFO L225 Difference]: With dead ends: 281 [2020-10-14 18:10:04,510 INFO L226 Difference]: Without dead ends: 213 [2020-10-14 18:10:04,511 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=142, Invalid=410, Unknown=0, NotChecked=0, Total=552 [2020-10-14 18:10:04,512 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 213 states. [2020-10-14 18:10:04,540 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 213 to 183. [2020-10-14 18:10:04,540 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 183 states. [2020-10-14 18:10:04,541 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 183 states to 183 states and 197 transitions. [2020-10-14 18:10:04,541 INFO L78 Accepts]: Start accepts. Automaton has 183 states and 197 transitions. Word has length 57 [2020-10-14 18:10:04,541 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 18:10:04,541 INFO L479 AbstractCegarLoop]: Abstraction has 183 states and 197 transitions. [2020-10-14 18:10:04,541 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-14 18:10:04,542 INFO L276 IsEmpty]: Start isEmpty. Operand 183 states and 197 transitions. [2020-10-14 18:10:04,542 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-10-14 18:10:04,542 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 18:10:04,542 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 18:10:04,543 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-10-14 18:10:04,543 INFO L427 AbstractCegarLoop]: === Iteration 21 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 18:10:04,543 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 18:10:04,543 INFO L82 PathProgramCache]: Analyzing trace with hash -1219011336, now seen corresponding path program 3 times [2020-10-14 18:10:04,543 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 18:10:04,543 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1755910176] [2020-10-14 18:10:04,543 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 18:10:04,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:10:04,566 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:10:04,661 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:10:04,753 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:10:04,853 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:10:05,201 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:10:05,276 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:10:05,342 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:10:05,529 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:10:05,599 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:10:05,671 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:10:05,719 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:10:05,836 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:10:05,945 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:10:06,087 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:10:06,367 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:10:06,552 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:10:06,840 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:10:07,164 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:10:08,741 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:10:08,919 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:10:09,568 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:10:09,568 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 75 [2020-10-14 18:10:09,568 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 20 [2020-10-14 18:10:09,568 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5009 [2020-10-14 18:10:09,569 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:10:09,569 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:10:09,569 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-10-14 18:10:09,569 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-14 18:10:09,569 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 54 [2020-10-14 18:10:09,570 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:10:09,901 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 18:10:09,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:10:09,903 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:10:09,905 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:10:09,906 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 18:10:09,906 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:10:09,906 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 18:10:09,907 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:10:09,907 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:10:09,907 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:10:09,908 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:10:09,908 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:10:09,908 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 18:10:09,912 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-14 18:10:09,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:10:09,914 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:10:09,915 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:10:09,915 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-14 18:10:09,915 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:10:09,916 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 18:10:09,916 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:10:09,916 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:10:09,917 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:10:09,917 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:10:09,917 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:10:09,917 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 18:10:09,918 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2020-10-14 18:10:09,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:10:09,920 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:10:09,922 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:10:09,922 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-14 18:10:09,923 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:10:09,923 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-14 18:10:09,923 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:10:09,924 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:10:09,924 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 18:10:09,924 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:10:09,924 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-14 18:10:09,925 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 18:10:09,926 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2020-10-14 18:10:09,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:10:09,928 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:10:09,933 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:10:09,934 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-14 18:10:09,934 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:10:09,934 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-14 18:10:09,934 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:10:09,934 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:10:09,935 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 18:10:09,935 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:10:09,935 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-14 18:10:09,936 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 18:10:09,950 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 4 proven. 34 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2020-10-14 18:10:09,950 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1755910176] [2020-10-14 18:10:09,951 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 18:10:09,951 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-14 18:10:09,951 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [511092193] [2020-10-14 18:10:09,954 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-14 18:10:09,954 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 18:10:09,955 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-14 18:10:09,955 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=269, Unknown=0, NotChecked=0, Total=306 [2020-10-14 18:10:09,955 INFO L87 Difference]: Start difference. First operand 183 states and 197 transitions. Second operand 18 states. [2020-10-14 18:10:10,768 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 18:10:10,768 INFO L93 Difference]: Finished difference Result 185 states and 198 transitions. [2020-10-14 18:10:10,769 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-14 18:10:10,769 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 61 [2020-10-14 18:10:10,769 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 18:10:10,770 INFO L225 Difference]: With dead ends: 185 [2020-10-14 18:10:10,770 INFO L226 Difference]: Without dead ends: 143 [2020-10-14 18:10:10,771 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 11 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=89, Invalid=667, Unknown=0, NotChecked=0, Total=756 [2020-10-14 18:10:10,771 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2020-10-14 18:10:10,786 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 143. [2020-10-14 18:10:10,786 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 143 states. [2020-10-14 18:10:10,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 156 transitions. [2020-10-14 18:10:10,787 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 156 transitions. Word has length 61 [2020-10-14 18:10:10,787 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 18:10:10,787 INFO L479 AbstractCegarLoop]: Abstraction has 143 states and 156 transitions. [2020-10-14 18:10:10,787 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-14 18:10:10,787 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 156 transitions. [2020-10-14 18:10:10,788 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2020-10-14 18:10:10,788 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 18:10:10,788 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 18:10:10,789 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-10-14 18:10:10,789 INFO L427 AbstractCegarLoop]: === Iteration 22 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 18:10:10,789 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 18:10:10,789 INFO L82 PathProgramCache]: Analyzing trace with hash -1045054102, now seen corresponding path program 4 times [2020-10-14 18:10:10,789 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 18:10:10,790 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2081820609] [2020-10-14 18:10:10,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 18:10:10,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:10:10,822 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:10:11,005 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:10:11,128 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:10:11,403 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:10:11,684 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:10:11,957 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:10:12,632 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:10:13,021 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:10:13,720 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:10:13,790 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:10:13,893 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:10:14,180 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:10:15,262 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:10:15,809 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:10:15,810 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 72 [2020-10-14 18:10:15,810 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 13 [2020-10-14 18:10:15,810 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-14 18:10:15,810 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:10:15,810 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:10:15,810 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 23 [2020-10-14 18:10:15,810 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-14 18:10:15,810 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 51 [2020-10-14 18:10:15,811 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:10:16,113 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 18:10:16,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:10:16,115 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:10:16,116 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:10:16,116 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 18:10:16,116 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:10:16,116 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 18:10:16,116 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:10:16,116 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:10:16,116 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:10:16,116 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:10:16,116 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:10:16,117 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:10:16,117 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-14 18:10:16,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:10:16,118 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:10:16,119 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:10:16,120 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-14 18:10:16,120 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:10:16,120 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 18:10:16,120 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:10:16,120 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:10:16,120 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:10:16,120 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:10:16,120 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:10:16,121 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:10:16,121 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2020-10-14 18:10:16,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:10:16,122 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:10:16,123 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:10:16,123 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-14 18:10:16,123 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:10:16,124 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 18:10:16,124 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:10:16,124 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:10:16,124 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 18:10:16,124 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:10:16,124 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-14 18:10:16,124 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:10:16,133 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 2 proven. 41 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2020-10-14 18:10:16,133 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2081820609] [2020-10-14 18:10:16,133 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 18:10:16,133 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-14 18:10:16,134 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [776316443] [2020-10-14 18:10:16,134 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-14 18:10:16,134 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 18:10:16,134 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-14 18:10:16,135 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=265, Unknown=0, NotChecked=0, Total=306 [2020-10-14 18:10:16,135 INFO L87 Difference]: Start difference. First operand 143 states and 156 transitions. Second operand 18 states. [2020-10-14 18:10:16,810 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 18:10:16,811 INFO L93 Difference]: Finished difference Result 174 states and 190 transitions. [2020-10-14 18:10:16,813 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-14 18:10:16,813 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 60 [2020-10-14 18:10:16,814 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 18:10:16,815 INFO L225 Difference]: With dead ends: 174 [2020-10-14 18:10:16,815 INFO L226 Difference]: Without dead ends: 172 [2020-10-14 18:10:16,815 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=87, Invalid=563, Unknown=0, NotChecked=0, Total=650 [2020-10-14 18:10:16,816 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2020-10-14 18:10:16,834 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 166. [2020-10-14 18:10:16,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 166 states. [2020-10-14 18:10:16,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 180 transitions. [2020-10-14 18:10:16,836 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 180 transitions. Word has length 60 [2020-10-14 18:10:16,836 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 18:10:16,837 INFO L479 AbstractCegarLoop]: Abstraction has 166 states and 180 transitions. [2020-10-14 18:10:16,837 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-14 18:10:16,837 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 180 transitions. [2020-10-14 18:10:16,838 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2020-10-14 18:10:16,838 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 18:10:16,838 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 18:10:16,838 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-10-14 18:10:16,838 INFO L427 AbstractCegarLoop]: === Iteration 23 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 18:10:16,838 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 18:10:16,839 INFO L82 PathProgramCache]: Analyzing trace with hash -1012283178, now seen corresponding path program 13 times [2020-10-14 18:10:16,839 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 18:10:16,839 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1588689576] [2020-10-14 18:10:16,839 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 18:10:16,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:10:16,865 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:10:16,995 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:10:17,174 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:10:17,345 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:10:17,387 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:10:17,510 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:10:17,797 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:10:18,035 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:10:18,214 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:10:18,511 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:10:19,524 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:10:19,785 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:10:20,188 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:10:20,709 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:10:21,141 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:10:21,365 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:10:21,562 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:10:21,859 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:10:21,859 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 69 [2020-10-14 18:10:21,859 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 17 [2020-10-14 18:10:21,859 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-10-14 18:10:21,860 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:10:21,860 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:10:21,860 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 26 [2020-10-14 18:10:21,860 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-14 18:10:21,860 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 33 [2020-10-14 18:10:21,861 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:10:23,586 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 18:10:23,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:10:23,588 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:10:23,589 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:10:23,589 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 18:10:23,589 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:10:23,589 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 18:10:23,589 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:10:23,589 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:10:23,590 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:10:23,590 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:10:23,590 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:10:23,590 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:10:23,591 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-14 18:10:23,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:10:23,592 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:10:23,592 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:10:23,592 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-14 18:10:23,592 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:10:23,592 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 18:10:23,593 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:10:23,593 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:10:23,593 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:10:23,593 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:10:23,593 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:10:23,593 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:10:23,615 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 21 proven. 55 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-10-14 18:10:23,615 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1588689576] [2020-10-14 18:10:23,616 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 18:10:23,616 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2020-10-14 18:10:23,616 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1807179898] [2020-10-14 18:10:23,616 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-10-14 18:10:23,617 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 18:10:23,617 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-10-14 18:10:23,617 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=634, Unknown=0, NotChecked=0, Total=702 [2020-10-14 18:10:23,617 INFO L87 Difference]: Start difference. First operand 166 states and 180 transitions. Second operand 27 states. [2020-10-14 18:10:24,238 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 47 [2020-10-14 18:10:25,529 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 18:10:25,529 INFO L93 Difference]: Finished difference Result 290 states and 326 transitions. [2020-10-14 18:10:25,530 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-14 18:10:25,530 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 59 [2020-10-14 18:10:25,530 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 18:10:25,531 INFO L225 Difference]: With dead ends: 290 [2020-10-14 18:10:25,531 INFO L226 Difference]: Without dead ends: 209 [2020-10-14 18:10:25,532 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 213 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=126, Invalid=1064, Unknown=0, NotChecked=0, Total=1190 [2020-10-14 18:10:25,533 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 209 states. [2020-10-14 18:10:25,559 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 209 to 197. [2020-10-14 18:10:25,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 197 states. [2020-10-14 18:10:25,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 197 states to 197 states and 213 transitions. [2020-10-14 18:10:25,561 INFO L78 Accepts]: Start accepts. Automaton has 197 states and 213 transitions. Word has length 59 [2020-10-14 18:10:25,561 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 18:10:25,561 INFO L479 AbstractCegarLoop]: Abstraction has 197 states and 213 transitions. [2020-10-14 18:10:25,561 INFO L480 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-10-14 18:10:25,561 INFO L276 IsEmpty]: Start isEmpty. Operand 197 states and 213 transitions. [2020-10-14 18:10:25,562 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-10-14 18:10:25,562 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 18:10:25,562 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 18:10:25,563 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-10-14 18:10:25,563 INFO L427 AbstractCegarLoop]: === Iteration 24 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 18:10:25,563 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 18:10:25,563 INFO L82 PathProgramCache]: Analyzing trace with hash -1554874920, now seen corresponding path program 14 times [2020-10-14 18:10:25,563 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 18:10:25,563 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [203629628] [2020-10-14 18:10:25,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 18:10:25,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:10:25,578 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:10:25,600 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:10:25,841 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:10:26,065 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:10:26,823 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:10:26,908 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:10:27,126 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:10:27,467 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:10:27,665 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:10:28,122 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:10:28,320 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:10:28,414 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:10:28,600 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:10:28,689 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:10:28,816 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:10:28,928 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:10:29,158 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:10:29,608 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:10:29,652 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:10:29,737 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:10:29,969 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:10:30,230 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:10:30,578 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:10:30,579 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 71 [2020-10-14 18:10:30,579 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 22 [2020-10-14 18:10:30,579 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-10-14 18:10:30,579 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:10:30,579 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:10:30,579 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 27 [2020-10-14 18:10:30,579 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-14 18:10:30,579 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 35 [2020-10-14 18:10:30,579 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:10:31,971 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 18:10:31,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:10:31,973 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:10:31,974 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:10:31,974 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 18:10:31,974 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:10:31,974 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 18:10:31,975 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:10:31,975 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:10:31,975 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:10:31,975 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:10:31,975 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:10:31,975 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:10:31,976 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-14 18:10:31,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:10:31,977 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:10:31,977 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:10:31,978 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-14 18:10:31,978 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:10:31,978 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 18:10:31,978 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:10:31,978 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:10:31,978 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:10:31,979 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:10:31,979 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:10:31,979 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:10:32,006 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 21 proven. 64 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2020-10-14 18:10:32,006 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [203629628] [2020-10-14 18:10:32,006 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 18:10:32,006 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2020-10-14 18:10:32,007 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1031815920] [2020-10-14 18:10:32,007 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-10-14 18:10:32,007 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 18:10:32,007 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-10-14 18:10:32,008 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=596, Unknown=0, NotChecked=0, Total=702 [2020-10-14 18:10:32,008 INFO L87 Difference]: Start difference. First operand 197 states and 213 transitions. Second operand 27 states. [2020-10-14 18:10:33,879 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 18:10:33,879 INFO L93 Difference]: Finished difference Result 290 states and 320 transitions. [2020-10-14 18:10:33,883 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-14 18:10:33,883 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 61 [2020-10-14 18:10:33,884 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 18:10:33,885 INFO L225 Difference]: With dead ends: 290 [2020-10-14 18:10:33,885 INFO L226 Difference]: Without dead ends: 228 [2020-10-14 18:10:33,886 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 196 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=172, Invalid=1160, Unknown=0, NotChecked=0, Total=1332 [2020-10-14 18:10:33,886 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 228 states. [2020-10-14 18:10:33,903 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 228 to 199. [2020-10-14 18:10:33,904 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 199 states. [2020-10-14 18:10:33,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 199 states to 199 states and 216 transitions. [2020-10-14 18:10:33,905 INFO L78 Accepts]: Start accepts. Automaton has 199 states and 216 transitions. Word has length 61 [2020-10-14 18:10:33,905 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 18:10:33,905 INFO L479 AbstractCegarLoop]: Abstraction has 199 states and 216 transitions. [2020-10-14 18:10:33,906 INFO L480 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-10-14 18:10:33,906 INFO L276 IsEmpty]: Start isEmpty. Operand 199 states and 216 transitions. [2020-10-14 18:10:33,906 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-10-14 18:10:33,907 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 18:10:33,907 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 18:10:33,907 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-10-14 18:10:33,907 INFO L427 AbstractCegarLoop]: === Iteration 25 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 18:10:33,907 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 18:10:33,907 INFO L82 PathProgramCache]: Analyzing trace with hash 268898970, now seen corresponding path program 15 times [2020-10-14 18:10:33,908 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 18:10:33,908 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1546234011] [2020-10-14 18:10:33,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 18:10:33,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:10:33,923 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:10:33,938 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:10:33,952 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:10:34,137 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:10:38,318 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:10:38,531 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:10:38,665 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:10:38,780 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:10:38,932 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:10:38,933 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 73 [2020-10-14 18:10:38,933 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-14 18:10:38,933 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5014 [2020-10-14 18:10:38,933 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:10:38,933 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:10:38,933 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-14 18:10:38,933 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-14 18:10:38,933 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 45 [2020-10-14 18:10:38,934 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:10:39,071 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 18:10:39,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:10:39,073 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:10:39,075 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:10:39,075 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 18:10:39,075 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:10:39,075 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 18:10:39,075 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:10:39,075 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:10:39,076 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:10:39,076 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:10:39,076 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:10:39,076 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:10:39,077 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-14 18:10:39,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:10:39,078 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:10:39,078 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:10:39,079 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-14 18:10:39,079 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:10:39,079 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 18:10:39,079 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:10:39,080 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:10:39,080 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:10:39,080 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:10:39,080 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:10:39,080 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:10:39,084 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 16 proven. 55 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2020-10-14 18:10:39,084 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1546234011] [2020-10-14 18:10:39,084 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 18:10:39,084 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-14 18:10:39,084 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [728325263] [2020-10-14 18:10:39,085 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-14 18:10:39,085 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 18:10:39,085 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-14 18:10:39,085 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=186, Unknown=0, NotChecked=0, Total=240 [2020-10-14 18:10:39,085 INFO L87 Difference]: Start difference. First operand 199 states and 216 transitions. Second operand 16 states. [2020-10-14 18:10:40,314 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 18:10:40,314 INFO L93 Difference]: Finished difference Result 317 states and 349 transitions. [2020-10-14 18:10:40,314 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-14 18:10:40,315 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 63 [2020-10-14 18:10:40,315 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 18:10:40,317 INFO L225 Difference]: With dead ends: 317 [2020-10-14 18:10:40,317 INFO L226 Difference]: Without dead ends: 271 [2020-10-14 18:10:40,318 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=169, Invalid=643, Unknown=0, NotChecked=0, Total=812 [2020-10-14 18:10:40,319 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 271 states. [2020-10-14 18:10:40,344 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 271 to 221. [2020-10-14 18:10:40,344 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 221 states. [2020-10-14 18:10:40,345 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 221 states to 221 states and 239 transitions. [2020-10-14 18:10:40,345 INFO L78 Accepts]: Start accepts. Automaton has 221 states and 239 transitions. Word has length 63 [2020-10-14 18:10:40,345 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 18:10:40,346 INFO L479 AbstractCegarLoop]: Abstraction has 221 states and 239 transitions. [2020-10-14 18:10:40,346 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-14 18:10:40,346 INFO L276 IsEmpty]: Start isEmpty. Operand 221 states and 239 transitions. [2020-10-14 18:10:40,347 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2020-10-14 18:10:40,347 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 18:10:40,347 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 18:10:40,347 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-10-14 18:10:40,347 INFO L427 AbstractCegarLoop]: === Iteration 26 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 18:10:40,348 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 18:10:40,348 INFO L82 PathProgramCache]: Analyzing trace with hash -1034081856, now seen corresponding path program 5 times [2020-10-14 18:10:40,348 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 18:10:40,348 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [152683963] [2020-10-14 18:10:40,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 18:10:40,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:10:40,383 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:10:40,519 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:10:40,622 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:10:40,818 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:10:41,491 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:10:41,581 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:10:41,823 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:10:41,897 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:10:42,004 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:10:42,335 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:10:42,559 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:10:42,736 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:10:43,268 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:10:43,673 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:10:43,940 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:10:44,339 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:10:44,584 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:10:44,862 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:10:45,073 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:10:45,383 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:10:45,384 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 82 [2020-10-14 18:10:45,384 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 19 [2020-10-14 18:10:45,384 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5013 [2020-10-14 18:10:45,384 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:10:45,384 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:10:45,384 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 24 [2020-10-14 18:10:45,384 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-14 18:10:45,384 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 61 [2020-10-14 18:10:45,384 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:10:45,819 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 18:10:45,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:10:45,822 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:10:45,823 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:10:45,823 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 18:10:45,823 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:10:45,824 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 18:10:45,824 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:10:45,824 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:10:45,825 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:10:45,825 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:10:45,825 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:10:45,825 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 18:10:45,827 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-14 18:10:45,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:10:45,828 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:10:45,829 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:10:45,829 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-14 18:10:45,829 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:10:45,830 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 18:10:45,830 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:10:45,830 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:10:45,831 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:10:45,831 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:10:45,831 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:10:45,831 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 18:10:45,832 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2020-10-14 18:10:45,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:10:45,835 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:10:45,837 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:10:45,837 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-14 18:10:45,838 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:10:45,838 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-14 18:10:45,838 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:10:45,839 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:10:45,839 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 18:10:45,839 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:10:45,839 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-14 18:10:45,840 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 18:10:45,841 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2020-10-14 18:10:45,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:10:45,843 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:10:45,845 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:10:45,845 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-14 18:10:45,846 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:10:45,846 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-14 18:10:45,846 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:10:45,846 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:10:45,847 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 18:10:45,847 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:10:45,847 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-14 18:10:45,848 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 18:10:45,864 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 4 proven. 51 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2020-10-14 18:10:45,864 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [152683963] [2020-10-14 18:10:45,864 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 18:10:45,864 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-10-14 18:10:45,865 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1076738136] [2020-10-14 18:10:45,866 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-14 18:10:45,866 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 18:10:45,867 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-14 18:10:45,867 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=336, Unknown=0, NotChecked=0, Total=380 [2020-10-14 18:10:45,867 INFO L87 Difference]: Start difference. First operand 221 states and 239 transitions. Second operand 20 states. [2020-10-14 18:10:46,886 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 18:10:46,886 INFO L93 Difference]: Finished difference Result 231 states and 248 transitions. [2020-10-14 18:10:46,887 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-14 18:10:46,887 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 68 [2020-10-14 18:10:46,888 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 18:10:46,889 INFO L225 Difference]: With dead ends: 231 [2020-10-14 18:10:46,889 INFO L226 Difference]: Without dead ends: 227 [2020-10-14 18:10:46,890 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 13 SyntacticMatches, 2 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 153 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=110, Invalid=882, Unknown=0, NotChecked=0, Total=992 [2020-10-14 18:10:46,890 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 227 states. [2020-10-14 18:10:46,915 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 227 to 223. [2020-10-14 18:10:46,915 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 223 states. [2020-10-14 18:10:46,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 223 states to 223 states and 240 transitions. [2020-10-14 18:10:46,917 INFO L78 Accepts]: Start accepts. Automaton has 223 states and 240 transitions. Word has length 68 [2020-10-14 18:10:46,917 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 18:10:46,917 INFO L479 AbstractCegarLoop]: Abstraction has 223 states and 240 transitions. [2020-10-14 18:10:46,917 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-14 18:10:46,917 INFO L276 IsEmpty]: Start isEmpty. Operand 223 states and 240 transitions. [2020-10-14 18:10:46,918 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-10-14 18:10:46,918 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 18:10:46,919 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 18:10:46,919 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-10-14 18:10:46,919 INFO L427 AbstractCegarLoop]: === Iteration 27 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 18:10:46,919 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 18:10:46,919 INFO L82 PathProgramCache]: Analyzing trace with hash 1865306444, now seen corresponding path program 16 times [2020-10-14 18:10:46,919 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 18:10:46,920 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [352357205] [2020-10-14 18:10:46,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 18:10:46,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:10:46,957 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:10:47,170 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:10:47,366 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:10:47,750 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:10:47,857 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:10:48,144 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:10:48,358 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:10:48,697 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:10:49,248 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:10:49,558 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:10:50,098 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:10:50,842 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:10:51,055 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:10:51,393 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:10:51,593 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:10:51,766 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:10:51,952 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:10:51,952 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 76 [2020-10-14 18:10:51,952 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 16 [2020-10-14 18:10:51,952 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5010 [2020-10-14 18:10:51,952 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:10:51,952 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:10:51,953 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 30 [2020-10-14 18:10:51,953 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-14 18:10:51,953 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 34 [2020-10-14 18:10:51,953 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:10:54,489 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 18:10:54,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:10:54,491 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:10:54,492 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:10:54,492 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 18:10:54,492 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:10:54,492 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 18:10:54,493 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:10:54,493 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:10:54,493 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:10:54,493 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:10:54,493 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:10:54,494 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 18:10:54,495 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-14 18:10:54,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:10:54,496 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:10:54,496 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:10:54,496 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-14 18:10:54,497 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:10:54,497 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 18:10:54,497 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:10:54,497 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:10:54,497 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:10:54,497 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:10:54,498 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:10:54,498 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:10:54,518 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 23 proven. 74 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2020-10-14 18:10:54,518 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [352357205] [2020-10-14 18:10:54,519 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 18:10:54,519 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32] total 32 [2020-10-14 18:10:54,519 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [279286973] [2020-10-14 18:10:54,519 INFO L459 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-10-14 18:10:54,519 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 18:10:54,519 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-10-14 18:10:54,520 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=920, Unknown=0, NotChecked=0, Total=992 [2020-10-14 18:10:54,520 INFO L87 Difference]: Start difference. First operand 223 states and 240 transitions. Second operand 32 states. [2020-10-14 18:10:57,661 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 18:10:57,662 INFO L93 Difference]: Finished difference Result 343 states and 376 transitions. [2020-10-14 18:10:57,662 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-10-14 18:10:57,662 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 66 [2020-10-14 18:10:57,663 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 18:10:57,664 INFO L225 Difference]: With dead ends: 343 [2020-10-14 18:10:57,664 INFO L226 Difference]: Without dead ends: 272 [2020-10-14 18:10:57,665 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 351 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=163, Invalid=2093, Unknown=0, NotChecked=0, Total=2256 [2020-10-14 18:10:57,666 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 272 states. [2020-10-14 18:10:57,690 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 272 to 256. [2020-10-14 18:10:57,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 256 states. [2020-10-14 18:10:57,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 256 states to 256 states and 275 transitions. [2020-10-14 18:10:57,692 INFO L78 Accepts]: Start accepts. Automaton has 256 states and 275 transitions. Word has length 66 [2020-10-14 18:10:57,692 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 18:10:57,693 INFO L479 AbstractCegarLoop]: Abstraction has 256 states and 275 transitions. [2020-10-14 18:10:57,693 INFO L480 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-10-14 18:10:57,693 INFO L276 IsEmpty]: Start isEmpty. Operand 256 states and 275 transitions. [2020-10-14 18:10:57,694 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2020-10-14 18:10:57,694 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 18:10:57,694 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 18:10:57,694 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-10-14 18:10:57,694 INFO L427 AbstractCegarLoop]: === Iteration 28 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 18:10:57,694 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 18:10:57,695 INFO L82 PathProgramCache]: Analyzing trace with hash -1421711926, now seen corresponding path program 17 times [2020-10-14 18:10:57,695 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 18:10:57,695 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [97006804] [2020-10-14 18:10:57,695 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 18:10:57,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:10:57,713 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:10:57,738 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:11:02,707 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:11:02,707 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 78 [2020-10-14 18:11:02,707 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 18:11:02,707 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-14 18:11:02,707 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:11:02,707 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:11:02,708 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-14 18:11:02,708 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 34 [2020-10-14 18:11:02,708 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 36 [2020-10-14 18:11:02,708 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:11:02,881 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 18:11:02,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:11:02,883 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:11:02,884 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:11:02,884 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 18:11:02,885 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:11:02,885 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 18:11:02,885 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:11:02,885 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:11:02,885 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:11:02,885 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:11:02,886 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:11:02,886 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:11:02,886 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-14 18:11:02,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:11:02,887 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:11:02,887 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:11:02,888 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-14 18:11:02,888 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:11:02,888 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 18:11:02,888 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:11:02,888 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:11:02,888 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:11:02,888 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:11:02,888 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:11:02,889 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:11:02,893 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 36 proven. 64 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2020-10-14 18:11:02,893 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [97006804] [2020-10-14 18:11:02,893 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 18:11:02,893 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-14 18:11:02,893 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2132697245] [2020-10-14 18:11:02,894 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-14 18:11:02,894 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 18:11:02,894 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-14 18:11:02,894 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=231, Unknown=0, NotChecked=0, Total=306 [2020-10-14 18:11:02,895 INFO L87 Difference]: Start difference. First operand 256 states and 275 transitions. Second operand 18 states. [2020-10-14 18:11:04,428 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 18:11:04,428 INFO L93 Difference]: Finished difference Result 429 states and 475 transitions. [2020-10-14 18:11:04,429 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-14 18:11:04,429 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 68 [2020-10-14 18:11:04,429 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 18:11:04,431 INFO L225 Difference]: With dead ends: 429 [2020-10-14 18:11:04,432 INFO L226 Difference]: Without dead ends: 338 [2020-10-14 18:11:04,433 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 159 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=248, Invalid=808, Unknown=0, NotChecked=0, Total=1056 [2020-10-14 18:11:04,433 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 338 states. [2020-10-14 18:11:04,462 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 338 to 273. [2020-10-14 18:11:04,463 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 273 states. [2020-10-14 18:11:04,464 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 273 states to 273 states and 294 transitions. [2020-10-14 18:11:04,464 INFO L78 Accepts]: Start accepts. Automaton has 273 states and 294 transitions. Word has length 68 [2020-10-14 18:11:04,464 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 18:11:04,465 INFO L479 AbstractCegarLoop]: Abstraction has 273 states and 294 transitions. [2020-10-14 18:11:04,465 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-14 18:11:04,465 INFO L276 IsEmpty]: Start isEmpty. Operand 273 states and 294 transitions. [2020-10-14 18:11:04,466 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2020-10-14 18:11:04,466 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 18:11:04,466 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 18:11:04,466 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2020-10-14 18:11:04,466 INFO L427 AbstractCegarLoop]: === Iteration 29 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 18:11:04,467 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 18:11:04,467 INFO L82 PathProgramCache]: Analyzing trace with hash -337383396, now seen corresponding path program 18 times [2020-10-14 18:11:04,467 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 18:11:04,467 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1773305831] [2020-10-14 18:11:04,467 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 18:11:04,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:11:04,484 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:11:04,520 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:11:09,485 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:11:09,485 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 81 [2020-10-14 18:11:09,486 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 18:11:09,486 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5007 [2020-10-14 18:11:09,486 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:11:09,486 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:11:09,486 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-14 18:11:09,486 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-14 18:11:09,486 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 50 [2020-10-14 18:11:09,486 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:11:09,656 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 18:11:09,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:11:09,658 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:11:09,659 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:11:09,659 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 18:11:09,659 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:11:09,659 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 18:11:09,660 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:11:09,660 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:11:09,660 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:11:09,660 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:11:09,660 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:11:09,660 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:11:09,661 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-14 18:11:09,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:11:09,661 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:11:09,662 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:11:09,662 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-14 18:11:09,662 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:11:09,662 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 18:11:09,662 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:11:09,662 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:11:09,663 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:11:09,663 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:11:09,663 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:11:09,663 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:11:09,667 INFO L134 CoverageAnalysis]: Checked inductivity of 155 backedges. 70 proven. 36 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2020-10-14 18:11:09,667 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1773305831] [2020-10-14 18:11:09,668 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 18:11:09,668 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-14 18:11:09,668 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [168324647] [2020-10-14 18:11:09,668 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-14 18:11:09,668 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 18:11:09,669 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-14 18:11:09,669 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=231, Unknown=0, NotChecked=0, Total=306 [2020-10-14 18:11:09,669 INFO L87 Difference]: Start difference. First operand 273 states and 294 transitions. Second operand 18 states. [2020-10-14 18:11:10,985 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 18:11:10,986 INFO L93 Difference]: Finished difference Result 481 states and 532 transitions. [2020-10-14 18:11:10,987 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-14 18:11:10,987 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 71 [2020-10-14 18:11:10,987 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 18:11:10,989 INFO L225 Difference]: With dead ends: 481 [2020-10-14 18:11:10,989 INFO L226 Difference]: Without dead ends: 357 [2020-10-14 18:11:10,993 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 268 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=330, Invalid=1002, Unknown=0, NotChecked=0, Total=1332 [2020-10-14 18:11:10,993 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 357 states. [2020-10-14 18:11:11,052 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 357 to 305. [2020-10-14 18:11:11,052 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 305 states. [2020-10-14 18:11:11,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 305 states to 305 states and 327 transitions. [2020-10-14 18:11:11,054 INFO L78 Accepts]: Start accepts. Automaton has 305 states and 327 transitions. Word has length 71 [2020-10-14 18:11:11,055 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 18:11:11,055 INFO L479 AbstractCegarLoop]: Abstraction has 305 states and 327 transitions. [2020-10-14 18:11:11,055 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-14 18:11:11,055 INFO L276 IsEmpty]: Start isEmpty. Operand 305 states and 327 transitions. [2020-10-14 18:11:11,057 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2020-10-14 18:11:11,057 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 18:11:11,057 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 18:11:11,058 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2020-10-14 18:11:11,058 INFO L427 AbstractCegarLoop]: === Iteration 30 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 18:11:11,058 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 18:11:11,058 INFO L82 PathProgramCache]: Analyzing trace with hash -640294890, now seen corresponding path program 6 times [2020-10-14 18:11:11,059 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 18:11:11,060 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1026393973] [2020-10-14 18:11:11,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 18:11:11,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:11:11,115 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:11:11,401 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:11:11,683 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:11:11,784 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:11:11,967 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:11:12,383 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:11:13,364 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:11:15,452 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:11:16,033 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:11:16,099 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:11:16,099 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 92 [2020-10-14 18:11:16,099 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-14 18:11:16,099 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5008 [2020-10-14 18:11:16,099 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:11:16,100 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:11:16,100 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 25 [2020-10-14 18:11:16,100 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-14 18:11:16,100 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 71 [2020-10-14 18:11:16,100 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:11:16,822 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 18:11:16,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:11:16,824 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:11:16,825 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:11:16,825 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 18:11:16,825 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:11:16,826 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 18:11:16,826 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:11:16,826 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:11:16,827 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:11:16,827 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:11:16,827 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:11:16,828 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 18:11:16,829 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-14 18:11:16,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:11:16,830 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:11:16,831 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:11:16,831 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-14 18:11:16,832 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:11:16,832 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 18:11:16,832 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:11:16,833 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:11:16,833 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:11:16,833 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:11:16,833 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:11:16,834 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 18:11:16,835 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2020-10-14 18:11:16,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:11:16,837 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:11:16,839 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:11:16,840 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-14 18:11:16,840 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:11:16,840 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-14 18:11:16,840 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:11:16,841 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:11:16,841 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 18:11:16,841 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:11:16,842 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-14 18:11:16,842 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 18:11:16,843 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2020-10-14 18:11:16,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:11:16,845 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:11:16,847 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:11:16,847 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-14 18:11:16,848 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:11:16,848 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-14 18:11:16,848 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:11:16,848 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:11:16,849 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 18:11:16,849 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:11:16,849 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-14 18:11:16,850 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 18:11:16,851 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2020-10-14 18:11:16,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:11:16,853 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:11:16,855 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:11:16,855 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-14 18:11:16,856 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:11:16,856 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-14 18:11:16,856 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:11:16,857 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:11:16,857 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 18:11:16,857 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:11:16,858 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-14 18:11:16,858 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 18:11:16,881 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 6 proven. 63 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2020-10-14 18:11:16,884 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1026393973] [2020-10-14 18:11:16,885 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 18:11:16,885 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-10-14 18:11:16,885 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1774183190] [2020-10-14 18:11:16,886 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-14 18:11:16,886 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 18:11:16,886 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-14 18:11:16,887 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=379, Unknown=0, NotChecked=0, Total=420 [2020-10-14 18:11:16,887 INFO L87 Difference]: Start difference. First operand 305 states and 327 transitions. Second operand 21 states. [2020-10-14 18:11:18,255 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 18:11:18,256 INFO L93 Difference]: Finished difference Result 307 states and 328 transitions. [2020-10-14 18:11:18,256 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-14 18:11:18,256 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 76 [2020-10-14 18:11:18,256 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 18:11:18,258 INFO L225 Difference]: With dead ends: 307 [2020-10-14 18:11:18,258 INFO L226 Difference]: Without dead ends: 252 [2020-10-14 18:11:18,259 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 14 SyntacticMatches, 3 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 114 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=108, Invalid=1014, Unknown=0, NotChecked=0, Total=1122 [2020-10-14 18:11:18,260 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 252 states. [2020-10-14 18:11:18,294 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 252 to 252. [2020-10-14 18:11:18,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 252 states. [2020-10-14 18:11:18,296 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 252 states to 252 states and 273 transitions. [2020-10-14 18:11:18,296 INFO L78 Accepts]: Start accepts. Automaton has 252 states and 273 transitions. Word has length 76 [2020-10-14 18:11:18,296 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 18:11:18,296 INFO L479 AbstractCegarLoop]: Abstraction has 252 states and 273 transitions. [2020-10-14 18:11:18,296 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-14 18:11:18,297 INFO L276 IsEmpty]: Start isEmpty. Operand 252 states and 273 transitions. [2020-10-14 18:11:18,298 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2020-10-14 18:11:18,298 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 18:11:18,298 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 18:11:18,298 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2020-10-14 18:11:18,298 INFO L427 AbstractCegarLoop]: === Iteration 31 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 18:11:18,298 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 18:11:18,299 INFO L82 PathProgramCache]: Analyzing trace with hash 312093440, now seen corresponding path program 7 times [2020-10-14 18:11:18,299 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 18:11:18,299 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1648195533] [2020-10-14 18:11:18,299 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 18:11:18,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:11:18,336 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:11:18,668 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:11:19,081 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:11:19,248 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:11:19,758 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:11:20,232 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:11:20,402 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:11:20,539 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:11:21,347 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:11:21,582 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:11:21,776 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:11:21,932 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:11:22,218 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:11:22,833 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:11:23,320 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:11:23,320 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 89 [2020-10-14 18:11:23,320 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 14 [2020-10-14 18:11:23,320 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-14 18:11:23,320 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:11:23,320 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:11:23,321 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 28 [2020-10-14 18:11:23,321 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-14 18:11:23,321 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 68 [2020-10-14 18:11:23,321 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:11:23,780 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 18:11:23,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:11:23,782 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:11:23,784 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:11:23,784 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 18:11:23,784 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:11:23,784 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 18:11:23,784 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:11:23,785 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:11:23,785 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:11:23,785 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:11:23,785 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:11:23,785 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:11:23,786 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-14 18:11:23,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:11:23,787 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:11:23,787 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:11:23,787 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-14 18:11:23,787 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:11:23,788 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 18:11:23,788 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:11:23,788 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:11:23,788 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:11:23,788 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:11:23,788 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:11:23,788 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:11:23,789 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2020-10-14 18:11:23,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:11:23,790 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:11:23,791 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:11:23,791 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-14 18:11:23,792 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:11:23,792 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 18:11:23,792 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:11:23,792 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:11:23,792 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 18:11:23,792 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:11:23,792 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-14 18:11:23,792 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:11:23,793 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2020-10-14 18:11:23,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:11:23,795 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:11:23,797 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:11:23,797 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-14 18:11:23,797 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:11:23,797 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-14 18:11:23,797 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:11:23,797 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:11:23,797 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 18:11:23,797 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:11:23,798 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-14 18:11:23,798 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:11:23,811 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 4 proven. 71 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2020-10-14 18:11:23,811 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1648195533] [2020-10-14 18:11:23,811 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 18:11:23,811 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-10-14 18:11:23,811 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1417223696] [2020-10-14 18:11:23,812 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-14 18:11:23,812 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 18:11:23,812 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-14 18:11:23,812 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=370, Unknown=0, NotChecked=0, Total=420 [2020-10-14 18:11:23,812 INFO L87 Difference]: Start difference. First operand 252 states and 273 transitions. Second operand 21 states. [2020-10-14 18:11:24,836 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 18:11:24,836 INFO L93 Difference]: Finished difference Result 296 states and 322 transitions. [2020-10-14 18:11:24,837 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-14 18:11:24,837 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 75 [2020-10-14 18:11:24,837 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 18:11:24,838 INFO L225 Difference]: With dead ends: 296 [2020-10-14 18:11:24,838 INFO L226 Difference]: Without dead ends: 294 [2020-10-14 18:11:24,839 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 15 SyntacticMatches, 3 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 151 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=107, Invalid=823, Unknown=0, NotChecked=0, Total=930 [2020-10-14 18:11:24,839 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 294 states. [2020-10-14 18:11:24,876 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 294 to 286. [2020-10-14 18:11:24,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 286 states. [2020-10-14 18:11:24,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 286 states to 286 states and 310 transitions. [2020-10-14 18:11:24,877 INFO L78 Accepts]: Start accepts. Automaton has 286 states and 310 transitions. Word has length 75 [2020-10-14 18:11:24,877 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 18:11:24,878 INFO L479 AbstractCegarLoop]: Abstraction has 286 states and 310 transitions. [2020-10-14 18:11:24,878 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-14 18:11:24,878 INFO L276 IsEmpty]: Start isEmpty. Operand 286 states and 310 transitions. [2020-10-14 18:11:24,879 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2020-10-14 18:11:24,879 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 18:11:24,879 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 18:11:24,879 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2020-10-14 18:11:24,879 INFO L427 AbstractCegarLoop]: === Iteration 32 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 18:11:24,880 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 18:11:24,880 INFO L82 PathProgramCache]: Analyzing trace with hash 271266334, now seen corresponding path program 19 times [2020-10-14 18:11:24,880 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 18:11:24,880 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [303464766] [2020-10-14 18:11:24,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 18:11:24,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:11:24,950 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:11:25,165 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:11:25,669 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:11:25,788 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:11:26,747 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:11:27,087 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:11:28,102 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:11:28,701 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:11:29,302 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:11:29,921 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:11:29,922 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 83 [2020-10-14 18:11:29,922 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-14 18:11:29,922 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-14 18:11:29,922 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:11:29,922 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:11:29,922 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 34 [2020-10-14 18:11:29,922 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-14 18:11:29,923 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 38 [2020-10-14 18:11:29,923 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:11:30,950 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 47 [2020-10-14 18:11:31,142 WARN L193 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 55 [2020-10-14 18:11:31,326 WARN L193 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 54 [2020-10-14 18:11:31,677 WARN L193 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 103 DAG size of output: 52 [2020-10-14 18:11:31,844 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 51 [2020-10-14 18:11:32,018 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 50 [2020-10-14 18:11:32,360 WARN L193 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 54 [2020-10-14 18:11:32,729 WARN L193 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 50 [2020-10-14 18:11:33,842 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 18:11:33,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:11:33,846 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:11:33,847 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:11:33,847 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 18:11:33,848 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:11:33,848 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 18:11:33,848 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:11:33,848 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:11:33,848 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:11:33,848 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:11:33,848 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:11:33,849 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:11:33,849 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-14 18:11:33,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:11:33,850 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:11:33,851 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:11:33,851 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-14 18:11:33,851 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:11:33,851 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 18:11:33,851 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:11:33,852 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:11:33,852 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:11:33,852 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:11:33,852 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:11:33,853 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 18:11:33,880 INFO L134 CoverageAnalysis]: Checked inductivity of 168 backedges. 28 proven. 100 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2020-10-14 18:11:33,881 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [303464766] [2020-10-14 18:11:33,881 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 18:11:33,881 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36] total 36 [2020-10-14 18:11:33,881 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2054329678] [2020-10-14 18:11:33,882 INFO L459 AbstractCegarLoop]: Interpolant automaton has 36 states [2020-10-14 18:11:33,882 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 18:11:33,882 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2020-10-14 18:11:33,882 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=1166, Unknown=0, NotChecked=0, Total=1260 [2020-10-14 18:11:33,883 INFO L87 Difference]: Start difference. First operand 286 states and 310 transitions. Second operand 36 states. [2020-10-14 18:11:34,875 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 40 [2020-10-14 18:11:35,135 WARN L193 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 52 [2020-10-14 18:11:35,381 WARN L193 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 48 [2020-10-14 18:11:35,864 WARN L193 SmtUtils]: Spent 363.00 ms on a formula simplification. DAG size of input: 123 DAG size of output: 82 [2020-10-14 18:11:36,476 WARN L193 SmtUtils]: Spent 316.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 73 [2020-10-14 18:11:36,874 WARN L193 SmtUtils]: Spent 308.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 67 [2020-10-14 18:11:37,219 WARN L193 SmtUtils]: Spent 237.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 66 [2020-10-14 18:11:37,472 WARN L193 SmtUtils]: Spent 191.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 54 [2020-10-14 18:11:37,768 WARN L193 SmtUtils]: Spent 231.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 66 [2020-10-14 18:11:37,937 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 51 [2020-10-14 18:11:38,242 WARN L193 SmtUtils]: Spent 233.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 66 [2020-10-14 18:11:38,607 WARN L193 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 68 [2020-10-14 18:11:39,185 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 63 [2020-10-14 18:11:40,234 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 18:11:40,234 INFO L93 Difference]: Finished difference Result 433 states and 477 transitions. [2020-10-14 18:11:40,235 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-10-14 18:11:40,235 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 73 [2020-10-14 18:11:40,236 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 18:11:40,237 INFO L225 Difference]: With dead ends: 433 [2020-10-14 18:11:40,237 INFO L226 Difference]: Without dead ends: 327 [2020-10-14 18:11:40,239 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 647 ImplicationChecksByTransitivity, 8.7s TimeCoverageRelationStatistics Valid=354, Invalid=3306, Unknown=0, NotChecked=0, Total=3660 [2020-10-14 18:11:40,239 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 327 states. [2020-10-14 18:11:40,279 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 327 to 311. [2020-10-14 18:11:40,279 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 311 states. [2020-10-14 18:11:40,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 311 states to 311 states and 337 transitions. [2020-10-14 18:11:40,281 INFO L78 Accepts]: Start accepts. Automaton has 311 states and 337 transitions. Word has length 73 [2020-10-14 18:11:40,282 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 18:11:40,282 INFO L479 AbstractCegarLoop]: Abstraction has 311 states and 337 transitions. [2020-10-14 18:11:40,282 INFO L480 AbstractCegarLoop]: Interpolant automaton has 36 states. [2020-10-14 18:11:40,282 INFO L276 IsEmpty]: Start isEmpty. Operand 311 states and 337 transitions. [2020-10-14 18:11:40,284 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2020-10-14 18:11:40,284 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 18:11:40,284 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 18:11:40,284 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2020-10-14 18:11:40,285 INFO L427 AbstractCegarLoop]: === Iteration 33 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 18:11:40,285 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 18:11:40,285 INFO L82 PathProgramCache]: Analyzing trace with hash 1136509920, now seen corresponding path program 20 times [2020-10-14 18:11:40,285 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 18:11:40,286 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [468334665] [2020-10-14 18:11:40,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 18:11:40,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:11:40,304 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:11:40,382 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:11:45,308 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:11:45,309 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 85 [2020-10-14 18:11:45,309 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 18:11:45,309 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5011 [2020-10-14 18:11:45,309 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:11:45,309 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:11:45,309 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-14 18:11:45,309 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 36 [2020-10-14 18:11:45,309 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 41 [2020-10-14 18:11:45,309 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:11:45,528 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 18:11:45,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:11:45,529 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:11:45,531 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:11:45,531 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 18:11:45,531 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:11:45,531 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 18:11:45,531 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:11:45,531 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:11:45,532 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:11:45,532 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:11:45,532 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:11:45,532 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:11:45,532 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-14 18:11:45,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:11:45,533 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:11:45,534 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:11:45,534 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-14 18:11:45,534 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:11:45,534 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 18:11:45,534 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:11:45,534 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:11:45,534 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:11:45,534 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:11:45,535 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:11:45,535 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:11:45,539 INFO L134 CoverageAnalysis]: Checked inductivity of 183 backedges. 49 proven. 85 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2020-10-14 18:11:45,539 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [468334665] [2020-10-14 18:11:45,539 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 18:11:45,539 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-10-14 18:11:45,539 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1944547544] [2020-10-14 18:11:45,539 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-14 18:11:45,540 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 18:11:45,540 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-14 18:11:45,540 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=287, Unknown=0, NotChecked=0, Total=380 [2020-10-14 18:11:45,540 INFO L87 Difference]: Start difference. First operand 311 states and 337 transitions. Second operand 20 states. [2020-10-14 18:11:47,395 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 18:11:47,395 INFO L93 Difference]: Finished difference Result 499 states and 549 transitions. [2020-10-14 18:11:47,396 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-14 18:11:47,396 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 75 [2020-10-14 18:11:47,396 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 18:11:47,398 INFO L225 Difference]: With dead ends: 499 [2020-10-14 18:11:47,398 INFO L226 Difference]: Without dead ends: 432 [2020-10-14 18:11:47,401 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 206 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=310, Invalid=1022, Unknown=0, NotChecked=0, Total=1332 [2020-10-14 18:11:47,402 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 432 states. [2020-10-14 18:11:47,445 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 432 to 362. [2020-10-14 18:11:47,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 362 states. [2020-10-14 18:11:47,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 362 states to 362 states and 391 transitions. [2020-10-14 18:11:47,449 INFO L78 Accepts]: Start accepts. Automaton has 362 states and 391 transitions. Word has length 75 [2020-10-14 18:11:47,449 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 18:11:47,449 INFO L479 AbstractCegarLoop]: Abstraction has 362 states and 391 transitions. [2020-10-14 18:11:47,450 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-14 18:11:47,450 INFO L276 IsEmpty]: Start isEmpty. Operand 362 states and 391 transitions. [2020-10-14 18:11:47,451 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2020-10-14 18:11:47,451 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 18:11:47,452 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 18:11:47,452 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2020-10-14 18:11:47,452 INFO L427 AbstractCegarLoop]: === Iteration 34 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 18:11:47,452 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 18:11:47,452 INFO L82 PathProgramCache]: Analyzing trace with hash 1749930566, now seen corresponding path program 21 times [2020-10-14 18:11:47,453 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 18:11:47,453 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2003634738] [2020-10-14 18:11:47,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 18:11:47,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:11:47,478 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:11:47,505 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:11:52,474 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:11:52,475 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 88 [2020-10-14 18:11:52,475 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 18:11:52,475 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-14 18:11:52,475 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:11:52,475 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:11:52,475 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-14 18:11:52,475 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-14 18:11:52,476 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 57 [2020-10-14 18:11:52,476 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:11:52,691 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 18:11:52,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:11:52,693 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:11:52,694 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:11:52,694 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 18:11:52,694 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:11:52,694 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 18:11:52,695 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:11:52,695 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:11:52,695 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:11:52,695 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:11:52,695 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:11:52,695 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:11:52,696 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-14 18:11:52,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:11:52,696 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:11:52,697 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:11:52,697 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-14 18:11:52,697 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:11:52,697 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 18:11:52,697 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:11:52,697 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:11:52,698 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:11:52,698 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:11:52,698 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:11:52,698 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:11:52,703 INFO L134 CoverageAnalysis]: Checked inductivity of 205 backedges. 92 proven. 49 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2020-10-14 18:11:52,703 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2003634738] [2020-10-14 18:11:52,703 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 18:11:52,703 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-10-14 18:11:52,703 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [52980083] [2020-10-14 18:11:52,704 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-14 18:11:52,704 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 18:11:52,704 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-14 18:11:52,704 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=287, Unknown=0, NotChecked=0, Total=380 [2020-10-14 18:11:52,704 INFO L87 Difference]: Start difference. First operand 362 states and 391 transitions. Second operand 20 states. [2020-10-14 18:11:54,183 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 18:11:54,183 INFO L93 Difference]: Finished difference Result 593 states and 652 transitions. [2020-10-14 18:11:54,184 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-10-14 18:11:54,185 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 78 [2020-10-14 18:11:54,185 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 18:11:54,187 INFO L225 Difference]: With dead ends: 593 [2020-10-14 18:11:54,187 INFO L226 Difference]: Without dead ends: 441 [2020-10-14 18:11:54,189 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 361 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=412, Invalid=1310, Unknown=0, NotChecked=0, Total=1722 [2020-10-14 18:11:54,190 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 441 states. [2020-10-14 18:11:54,244 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 441 to 387. [2020-10-14 18:11:54,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 387 states. [2020-10-14 18:11:54,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 387 states to 387 states and 416 transitions. [2020-10-14 18:11:54,246 INFO L78 Accepts]: Start accepts. Automaton has 387 states and 416 transitions. Word has length 78 [2020-10-14 18:11:54,246 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 18:11:54,246 INFO L479 AbstractCegarLoop]: Abstraction has 387 states and 416 transitions. [2020-10-14 18:11:54,246 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-14 18:11:54,246 INFO L276 IsEmpty]: Start isEmpty. Operand 387 states and 416 transitions. [2020-10-14 18:11:54,247 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2020-10-14 18:11:54,247 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 18:11:54,248 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 18:11:54,248 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2020-10-14 18:11:54,248 INFO L427 AbstractCegarLoop]: === Iteration 35 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 18:11:54,248 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 18:11:54,248 INFO L82 PathProgramCache]: Analyzing trace with hash -224550570, now seen corresponding path program 8 times [2020-10-14 18:11:54,249 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 18:11:54,249 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [605176432] [2020-10-14 18:11:54,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 18:11:54,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:11:54,282 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:11:54,442 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:11:54,640 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:11:55,040 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:11:55,959 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:11:56,354 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:11:56,994 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:11:59,278 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:11:59,278 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 99 [2020-10-14 18:11:59,278 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-14 18:11:59,278 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5008 [2020-10-14 18:11:59,278 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:11:59,279 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:11:59,279 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 29 [2020-10-14 18:11:59,279 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-14 18:11:59,279 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 78 [2020-10-14 18:11:59,279 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:11:59,807 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 18:11:59,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:11:59,809 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:11:59,810 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:11:59,810 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 18:11:59,810 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:11:59,810 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 18:11:59,811 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:11:59,811 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:11:59,811 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:11:59,811 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:11:59,811 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:11:59,811 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:11:59,812 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-14 18:11:59,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:11:59,812 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:11:59,813 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:11:59,813 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-14 18:11:59,813 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:11:59,813 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 18:11:59,813 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:11:59,814 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:11:59,814 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:11:59,814 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:11:59,814 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:11:59,814 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:11:59,815 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2020-10-14 18:11:59,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:11:59,816 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:11:59,817 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:11:59,817 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-14 18:11:59,817 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:11:59,818 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 18:11:59,818 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:11:59,818 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:11:59,818 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 18:11:59,818 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:11:59,818 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-14 18:11:59,818 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:11:59,819 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2020-10-14 18:11:59,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:11:59,820 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:11:59,821 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:11:59,822 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-14 18:11:59,822 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:11:59,822 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 18:11:59,822 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:11:59,822 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:11:59,822 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 18:11:59,823 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:11:59,823 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-14 18:11:59,823 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:11:59,823 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2020-10-14 18:11:59,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:11:59,825 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:11:59,826 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:11:59,826 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-14 18:11:59,827 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:11:59,827 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 18:11:59,827 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:11:59,827 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:11:59,827 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 18:11:59,827 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:11:59,828 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-14 18:11:59,828 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:11:59,849 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 6 proven. 85 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2020-10-14 18:11:59,849 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [605176432] [2020-10-14 18:11:59,849 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 18:11:59,849 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-10-14 18:11:59,849 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1776204306] [2020-10-14 18:11:59,850 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-14 18:11:59,850 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 18:11:59,850 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-14 18:11:59,850 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=455, Unknown=0, NotChecked=0, Total=506 [2020-10-14 18:11:59,850 INFO L87 Difference]: Start difference. First operand 387 states and 416 transitions. Second operand 23 states. [2020-10-14 18:12:01,319 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 18:12:01,319 INFO L93 Difference]: Finished difference Result 405 states and 434 transitions. [2020-10-14 18:12:01,319 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-14 18:12:01,320 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 83 [2020-10-14 18:12:01,320 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 18:12:01,321 INFO L225 Difference]: With dead ends: 405 [2020-10-14 18:12:01,321 INFO L226 Difference]: Without dead ends: 403 [2020-10-14 18:12:01,322 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 16 SyntacticMatches, 3 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 210 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=127, Invalid=1205, Unknown=0, NotChecked=0, Total=1332 [2020-10-14 18:12:01,323 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 403 states. [2020-10-14 18:12:01,379 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 403 to 395. [2020-10-14 18:12:01,379 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 395 states. [2020-10-14 18:12:01,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 395 states to 395 states and 424 transitions. [2020-10-14 18:12:01,381 INFO L78 Accepts]: Start accepts. Automaton has 395 states and 424 transitions. Word has length 83 [2020-10-14 18:12:01,381 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 18:12:01,381 INFO L479 AbstractCegarLoop]: Abstraction has 395 states and 424 transitions. [2020-10-14 18:12:01,381 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-14 18:12:01,381 INFO L276 IsEmpty]: Start isEmpty. Operand 395 states and 424 transitions. [2020-10-14 18:12:01,382 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2020-10-14 18:12:01,382 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 18:12:01,383 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 18:12:01,383 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2020-10-14 18:12:01,383 INFO L427 AbstractCegarLoop]: === Iteration 36 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 18:12:01,383 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 18:12:01,383 INFO L82 PathProgramCache]: Analyzing trace with hash 326806020, now seen corresponding path program 22 times [2020-10-14 18:12:01,383 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 18:12:01,384 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [19954989] [2020-10-14 18:12:01,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 18:12:01,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:12:01,440 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:12:01,901 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:12:02,332 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:12:03,031 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:12:04,095 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:12:04,922 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:12:06,336 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:12:06,658 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:12:06,659 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 90 [2020-10-14 18:12:06,659 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-14 18:12:06,659 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5244 [2020-10-14 18:12:06,659 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:12:06,659 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:12:06,659 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 38 [2020-10-14 18:12:06,659 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-14 18:12:06,659 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 42 [2020-10-14 18:12:06,660 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:12:08,130 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 56 [2020-10-14 18:12:08,304 WARN L193 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 56 [2020-10-14 18:12:11,011 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 18:12:11,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:12:11,013 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:12:11,014 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:12:11,014 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 18:12:11,014 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:12:11,014 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 18:12:11,015 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:12:11,015 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:12:11,015 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:12:11,015 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:12:11,015 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:12:11,015 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:12:11,016 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-14 18:12:11,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:12:11,017 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:12:11,017 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:12:11,017 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-14 18:12:11,017 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:12:11,017 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 18:12:11,018 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:12:11,018 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:12:11,018 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:12:11,018 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:12:11,018 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:12:11,019 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:12:11,076 INFO L134 CoverageAnalysis]: Checked inductivity of 220 backedges. 33 proven. 130 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2020-10-14 18:12:11,077 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [19954989] [2020-10-14 18:12:11,077 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 18:12:11,077 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40] total 40 [2020-10-14 18:12:11,077 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2022707304] [2020-10-14 18:12:11,077 INFO L459 AbstractCegarLoop]: Interpolant automaton has 40 states [2020-10-14 18:12:11,077 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 18:12:11,078 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2020-10-14 18:12:11,078 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=1469, Unknown=0, NotChecked=0, Total=1560 [2020-10-14 18:12:11,078 INFO L87 Difference]: Start difference. First operand 395 states and 424 transitions. Second operand 40 states. [2020-10-14 18:12:12,790 WARN L193 SmtUtils]: Spent 327.00 ms on a formula simplification. DAG size of input: 137 DAG size of output: 73 [2020-10-14 18:12:13,382 WARN L193 SmtUtils]: Spent 288.00 ms on a formula simplification. DAG size of input: 104 DAG size of output: 77 [2020-10-14 18:12:13,647 WARN L193 SmtUtils]: Spent 128.00 ms on a formula simplification that was a NOOP. DAG size: 88 [2020-10-14 18:12:14,050 WARN L193 SmtUtils]: Spent 292.00 ms on a formula simplification. DAG size of input: 140 DAG size of output: 77 [2020-10-14 18:12:14,530 WARN L193 SmtUtils]: Spent 165.00 ms on a formula simplification that was a NOOP. DAG size: 91 [2020-10-14 18:12:14,885 WARN L193 SmtUtils]: Spent 241.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 72 [2020-10-14 18:12:15,543 WARN L193 SmtUtils]: Spent 315.00 ms on a formula simplification. DAG size of input: 142 DAG size of output: 80 [2020-10-14 18:12:15,798 WARN L193 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 59 [2020-10-14 18:12:15,994 WARN L193 SmtUtils]: Spent 129.00 ms on a formula simplification that was a NOOP. DAG size: 78 [2020-10-14 18:12:16,799 WARN L193 SmtUtils]: Spent 449.00 ms on a formula simplification. DAG size of input: 135 DAG size of output: 83 [2020-10-14 18:12:17,472 WARN L193 SmtUtils]: Spent 259.00 ms on a formula simplification. DAG size of input: 144 DAG size of output: 58 [2020-10-14 18:12:18,002 WARN L193 SmtUtils]: Spent 296.00 ms on a formula simplification. DAG size of input: 127 DAG size of output: 54 [2020-10-14 18:12:18,539 WARN L193 SmtUtils]: Spent 252.00 ms on a formula simplification. DAG size of input: 118 DAG size of output: 51 [2020-10-14 18:12:18,975 WARN L193 SmtUtils]: Spent 230.00 ms on a formula simplification. DAG size of input: 117 DAG size of output: 46 [2020-10-14 18:12:19,374 WARN L193 SmtUtils]: Spent 189.00 ms on a formula simplification. DAG size of input: 105 DAG size of output: 47 [2020-10-14 18:12:19,686 WARN L193 SmtUtils]: Spent 209.00 ms on a formula simplification. DAG size of input: 114 DAG size of output: 45 [2020-10-14 18:12:20,112 WARN L193 SmtUtils]: Spent 306.00 ms on a formula simplification. DAG size of input: 114 DAG size of output: 91 [2020-10-14 18:12:20,447 WARN L193 SmtUtils]: Spent 190.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 69 [2020-10-14 18:12:20,794 WARN L193 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 60 [2020-10-14 18:12:21,056 WARN L193 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 60 [2020-10-14 18:12:21,320 WARN L193 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 52 [2020-10-14 18:12:21,690 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 41 [2020-10-14 18:12:22,426 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 18:12:22,427 INFO L93 Difference]: Finished difference Result 580 states and 631 transitions. [2020-10-14 18:12:22,427 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2020-10-14 18:12:22,427 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 80 [2020-10-14 18:12:22,428 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 18:12:22,429 INFO L225 Difference]: With dead ends: 580 [2020-10-14 18:12:22,429 INFO L226 Difference]: Without dead ends: 462 [2020-10-14 18:12:22,432 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1368 ImplicationChecksByTransitivity, 13.1s TimeCoverageRelationStatistics Valid=645, Invalid=5835, Unknown=0, NotChecked=0, Total=6480 [2020-10-14 18:12:22,433 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 462 states. [2020-10-14 18:12:22,487 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 462 to 441. [2020-10-14 18:12:22,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 441 states. [2020-10-14 18:12:22,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 441 states to 441 states and 473 transitions. [2020-10-14 18:12:22,489 INFO L78 Accepts]: Start accepts. Automaton has 441 states and 473 transitions. Word has length 80 [2020-10-14 18:12:22,489 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 18:12:22,489 INFO L479 AbstractCegarLoop]: Abstraction has 441 states and 473 transitions. [2020-10-14 18:12:22,489 INFO L480 AbstractCegarLoop]: Interpolant automaton has 40 states. [2020-10-14 18:12:22,489 INFO L276 IsEmpty]: Start isEmpty. Operand 441 states and 473 transitions. [2020-10-14 18:12:22,490 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2020-10-14 18:12:22,490 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 18:12:22,490 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 18:12:22,491 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2020-10-14 18:12:22,491 INFO L427 AbstractCegarLoop]: === Iteration 37 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 18:12:22,491 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 18:12:22,491 INFO L82 PathProgramCache]: Analyzing trace with hash -317724158, now seen corresponding path program 23 times [2020-10-14 18:12:22,491 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 18:12:22,491 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [614057404] [2020-10-14 18:12:22,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 18:12:22,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:12:22,505 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:12:22,880 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:12:27,517 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:12:27,517 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 92 [2020-10-14 18:12:27,517 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 18:12:27,517 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5016 [2020-10-14 18:12:27,517 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:12:27,517 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:12:27,517 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-10-14 18:12:27,518 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 38 [2020-10-14 18:12:27,518 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 46 [2020-10-14 18:12:27,518 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:12:27,792 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 18:12:27,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:12:27,794 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:12:27,795 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:12:27,795 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 18:12:27,796 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:12:27,796 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 18:12:27,796 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:12:27,796 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:12:27,796 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:12:27,796 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:12:27,796 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:12:27,797 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:12:27,797 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-14 18:12:27,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:12:27,798 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:12:27,799 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:12:27,799 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-14 18:12:27,799 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:12:27,799 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 18:12:27,799 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:12:27,799 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:12:27,799 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:12:27,799 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:12:27,800 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:12:27,800 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:12:27,804 INFO L134 CoverageAnalysis]: Checked inductivity of 237 backedges. 64 proven. 109 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2020-10-14 18:12:27,805 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [614057404] [2020-10-14 18:12:27,805 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 18:12:27,805 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-10-14 18:12:27,805 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [235610618] [2020-10-14 18:12:27,806 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-14 18:12:27,806 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 18:12:27,806 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-14 18:12:27,806 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=349, Unknown=0, NotChecked=0, Total=462 [2020-10-14 18:12:27,806 INFO L87 Difference]: Start difference. First operand 441 states and 473 transitions. Second operand 22 states. [2020-10-14 18:12:30,374 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 18:12:30,374 INFO L93 Difference]: Finished difference Result 694 states and 762 transitions. [2020-10-14 18:12:30,375 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-14 18:12:30,375 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 82 [2020-10-14 18:12:30,376 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 18:12:30,379 INFO L225 Difference]: With dead ends: 694 [2020-10-14 18:12:30,379 INFO L226 Difference]: Without dead ends: 550 [2020-10-14 18:12:30,380 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 259 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=379, Invalid=1261, Unknown=0, NotChecked=0, Total=1640 [2020-10-14 18:12:30,381 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 550 states. [2020-10-14 18:12:30,448 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 550 to 476. [2020-10-14 18:12:30,448 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 476 states. [2020-10-14 18:12:30,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 476 states to 476 states and 510 transitions. [2020-10-14 18:12:30,450 INFO L78 Accepts]: Start accepts. Automaton has 476 states and 510 transitions. Word has length 82 [2020-10-14 18:12:30,450 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 18:12:30,450 INFO L479 AbstractCegarLoop]: Abstraction has 476 states and 510 transitions. [2020-10-14 18:12:30,450 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-14 18:12:30,450 INFO L276 IsEmpty]: Start isEmpty. Operand 476 states and 510 transitions. [2020-10-14 18:12:30,452 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2020-10-14 18:12:30,452 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 18:12:30,452 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 18:12:30,452 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2020-10-14 18:12:30,452 INFO L427 AbstractCegarLoop]: === Iteration 38 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 18:12:30,452 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 18:12:30,453 INFO L82 PathProgramCache]: Analyzing trace with hash 1997627620, now seen corresponding path program 24 times [2020-10-14 18:12:30,453 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 18:12:30,453 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [903711726] [2020-10-14 18:12:30,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 18:12:30,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:12:30,472 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:12:30,496 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:12:35,464 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:12:35,465 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 95 [2020-10-14 18:12:35,465 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 18:12:35,465 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4999 [2020-10-14 18:12:35,465 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:12:35,465 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:12:35,465 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-10-14 18:12:35,465 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-14 18:12:35,465 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 64 [2020-10-14 18:12:35,465 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:12:35,742 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 18:12:35,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:12:35,745 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:12:35,746 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:12:35,746 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 18:12:35,746 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:12:35,746 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 18:12:35,746 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:12:35,747 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:12:35,747 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:12:35,747 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:12:35,747 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:12:35,747 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:12:35,748 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-14 18:12:35,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:12:35,749 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:12:35,750 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:12:35,750 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-14 18:12:35,750 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:12:35,750 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 18:12:35,750 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:12:35,751 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:12:35,751 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:12:35,751 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:12:35,751 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:12:35,751 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:12:35,760 INFO L134 CoverageAnalysis]: Checked inductivity of 262 backedges. 117 proven. 64 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2020-10-14 18:12:35,760 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [903711726] [2020-10-14 18:12:35,760 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 18:12:35,760 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-10-14 18:12:35,760 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [47194056] [2020-10-14 18:12:35,761 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-14 18:12:35,761 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 18:12:35,761 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-14 18:12:35,761 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=349, Unknown=0, NotChecked=0, Total=462 [2020-10-14 18:12:35,762 INFO L87 Difference]: Start difference. First operand 476 states and 510 transitions. Second operand 22 states. [2020-10-14 18:12:37,917 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 18:12:37,917 INFO L93 Difference]: Finished difference Result 726 states and 792 transitions. [2020-10-14 18:12:37,918 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2020-10-14 18:12:37,918 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 85 [2020-10-14 18:12:37,919 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 18:12:37,921 INFO L225 Difference]: With dead ends: 726 [2020-10-14 18:12:37,921 INFO L226 Difference]: Without dead ends: 559 [2020-10-14 18:12:37,923 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 643 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=652, Invalid=2104, Unknown=0, NotChecked=0, Total=2756 [2020-10-14 18:12:37,925 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 559 states. [2020-10-14 18:12:38,013 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 559 to 505. [2020-10-14 18:12:38,013 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 505 states. [2020-10-14 18:12:38,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 505 states to 505 states and 540 transitions. [2020-10-14 18:12:38,017 INFO L78 Accepts]: Start accepts. Automaton has 505 states and 540 transitions. Word has length 85 [2020-10-14 18:12:38,017 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 18:12:38,017 INFO L479 AbstractCegarLoop]: Abstraction has 505 states and 540 transitions. [2020-10-14 18:12:38,017 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-14 18:12:38,017 INFO L276 IsEmpty]: Start isEmpty. Operand 505 states and 540 transitions. [2020-10-14 18:12:38,019 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2020-10-14 18:12:38,019 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 18:12:38,019 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 18:12:38,019 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2020-10-14 18:12:38,019 INFO L427 AbstractCegarLoop]: === Iteration 39 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 18:12:38,020 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 18:12:38,020 INFO L82 PathProgramCache]: Analyzing trace with hash 2043175340, now seen corresponding path program 9 times [2020-10-14 18:12:38,020 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 18:12:38,020 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [246091905] [2020-10-14 18:12:38,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 18:12:38,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:12:38,055 FATAL L256 erpolLogProxyWrapper]: Now shrinking...