/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=WIDESTAMONGSMALL --traceabstraction.additional.smt.options tolerance=0.4 --traceabstraction.additional.smt.options log-additional-information=true --traceabstraction.additional.smt.options unknown-allowed=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/array-examples/standard_partition_original_ground.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-adbd35c [2020-10-13 23:42:31,824 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-13 23:42:31,827 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-13 23:42:31,851 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-13 23:42:31,851 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-13 23:42:31,852 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-13 23:42:31,854 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-13 23:42:31,856 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-13 23:42:31,857 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-13 23:42:31,858 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-13 23:42:31,859 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-13 23:42:31,860 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-13 23:42:31,861 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-13 23:42:31,862 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-13 23:42:31,863 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-13 23:42:31,864 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-13 23:42:31,865 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-13 23:42:31,866 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-13 23:42:31,868 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-13 23:42:31,870 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-13 23:42:31,871 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-13 23:42:31,873 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-13 23:42:31,874 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-13 23:42:31,874 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-13 23:42:31,877 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-13 23:42:31,878 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-13 23:42:31,878 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-13 23:42:31,879 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-13 23:42:31,879 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-13 23:42:31,880 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-13 23:42:31,880 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-13 23:42:31,881 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-13 23:42:31,882 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-13 23:42:31,883 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-13 23:42:31,884 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-13 23:42:31,884 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-13 23:42:31,885 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-13 23:42:31,885 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-13 23:42:31,885 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-13 23:42:31,887 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-13 23:42:31,887 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-13 23:42:31,888 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 [2020-10-13 23:42:31,913 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-13 23:42:31,913 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-13 23:42:31,914 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-13 23:42:31,914 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-13 23:42:31,915 INFO L138 SettingsManager]: * Use SBE=true [2020-10-13 23:42:31,915 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-13 23:42:31,915 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-13 23:42:31,915 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-13 23:42:31,915 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-13 23:42:31,916 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-13 23:42:31,916 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-13 23:42:31,916 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-13 23:42:31,916 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-13 23:42:31,917 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-13 23:42:31,917 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-13 23:42:31,917 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-13 23:42:31,917 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-13 23:42:31,917 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-13 23:42:31,918 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-13 23:42:31,918 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-13 23:42:31,918 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-13 23:42:31,918 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-13 23:42:31,918 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-13 23:42:31,919 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-13 23:42:31,919 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-13 23:42:31,919 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-13 23:42:31,919 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-13 23:42:31,919 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-13 23:42:31,920 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-13 23:42:31,920 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=WIDESTAMONGSMALL;tolerance=0.4;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=WIDESTAMONGSMALL;tolerance=0.4;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=WIDESTAMONGSMALL;tolerance=0.4;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=WIDESTAMONGSMALL;tolerance=0.4;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=WIDESTAMONGSMALL;tolerance=0.4;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=WIDESTAMONGSMALL;tolerance=0.4;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=WIDESTAMONGSMALL;tolerance=0.4;log-additional-information=true;unknown-allowed=true; [2020-10-13 23:42:32,216 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-13 23:42:32,229 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-13 23:42:32,233 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-13 23:42:32,235 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-13 23:42:32,235 INFO L275 PluginConnector]: CDTParser initialized [2020-10-13 23:42:32,236 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-examples/standard_partition_original_ground.i [2020-10-13 23:42:32,303 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/b6f80b0ce/e6bd499b472e4221b79bb75b311652fc/FLAG660db3777 [2020-10-13 23:42:32,701 INFO L306 CDTParser]: Found 1 translation units. [2020-10-13 23:42:32,702 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/array-examples/standard_partition_original_ground.i [2020-10-13 23:42:32,708 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/b6f80b0ce/e6bd499b472e4221b79bb75b311652fc/FLAG660db3777 [2020-10-13 23:42:33,081 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/b6f80b0ce/e6bd499b472e4221b79bb75b311652fc [2020-10-13 23:42:33,092 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-13 23:42:33,094 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-13 23:42:33,095 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-13 23:42:33,095 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-13 23:42:33,099 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-13 23:42:33,100 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 11:42:33" (1/1) ... [2020-10-13 23:42:33,103 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@d5d5e76 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:42:33, skipping insertion in model container [2020-10-13 23:42:33,103 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 11:42:33" (1/1) ... [2020-10-13 23:42:33,113 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-13 23:42:33,139 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-13 23:42:33,379 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-13 23:42:33,386 INFO L203 MainTranslator]: Completed pre-run [2020-10-13 23:42:33,433 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-13 23:42:33,456 INFO L208 MainTranslator]: Completed translation [2020-10-13 23:42:33,464 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:42:33 WrapperNode [2020-10-13 23:42:33,464 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-13 23:42:33,466 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-13 23:42:33,466 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-13 23:42:33,466 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-13 23:42:33,575 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:42:33" (1/1) ... [2020-10-13 23:42:33,575 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:42:33" (1/1) ... [2020-10-13 23:42:33,584 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:42:33" (1/1) ... [2020-10-13 23:42:33,584 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:42:33" (1/1) ... [2020-10-13 23:42:33,593 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:42:33" (1/1) ... [2020-10-13 23:42:33,599 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:42:33" (1/1) ... [2020-10-13 23:42:33,600 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:42:33" (1/1) ... [2020-10-13 23:42:33,604 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-13 23:42:33,605 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-13 23:42:33,605 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-13 23:42:33,605 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-13 23:42:33,606 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:42:33" (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 [2020-10-13 23:42:33,666 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-13 23:42:33,667 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-13 23:42:33,667 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-13 23:42:33,667 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-13 23:42:33,667 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-10-13 23:42:33,668 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-13 23:42:33,668 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-13 23:42:33,668 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-13 23:42:33,673 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-13 23:42:33,673 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-13 23:42:33,673 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-13 23:42:33,674 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-13 23:42:33,674 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-13 23:42:33,674 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-13 23:42:33,977 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-13 23:42:33,978 INFO L295 CfgBuilder]: Removed 4 assume(true) statements. [2020-10-13 23:42:33,983 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 11:42:33 BoogieIcfgContainer [2020-10-13 23:42:33,983 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-13 23:42:33,984 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-13 23:42:33,985 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-13 23:42:33,989 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-13 23:42:33,989 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 11:42:33" (1/3) ... [2020-10-13 23:42:33,990 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2a26d3e9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 11:42:33, skipping insertion in model container [2020-10-13 23:42:33,990 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:42:33" (2/3) ... [2020-10-13 23:42:33,991 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2a26d3e9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 11:42:33, skipping insertion in model container [2020-10-13 23:42:33,991 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 11:42:33" (3/3) ... [2020-10-13 23:42:33,993 INFO L109 eAbstractionObserver]: Analyzing ICFG standard_partition_original_ground.i [2020-10-13 23:42:34,006 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-13 23:42:34,013 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-13 23:42:34,029 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-13 23:42:34,058 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-10-13 23:42:34,058 INFO L376 AbstractCegarLoop]: Hoare is true [2020-10-13 23:42:34,058 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-13 23:42:34,058 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-13 23:42:34,059 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-13 23:42:34,059 INFO L380 AbstractCegarLoop]: Difference is false [2020-10-13 23:42:34,059 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-13 23:42:34,059 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-13 23:42:34,086 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states. [2020-10-13 23:42:34,093 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-13 23:42:34,093 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:42:34,094 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:42:34,095 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:42:34,102 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:42:34,102 INFO L82 PathProgramCache]: Analyzing trace with hash 1902154591, now seen corresponding path program 1 times [2020-10-13 23:42:34,111 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:42:34,112 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1292834015] [2020-10-13 23:42:34,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:42:34,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:42:34,245 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:42:34,276 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:42:34,312 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:42:34,564 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:42:34,564 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 22 [2020-10-13 23:42:34,565 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 23:42:34,565 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 340 [2020-10-13 23:42:34,568 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:42:34,569 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:42:34,569 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:42:34,569 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-13 23:42:34,570 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:42:34,570 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-10-13 23:42:34,623 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:42:34,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:42:34,634 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:42:34,639 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:42:34,640 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:42:34,640 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:42:34,640 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-13 23:42:34,641 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:42:34,642 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:42:34,642 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:42:34,642 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:42:34,642 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:42:34,643 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:42:34,651 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 23:42:34,652 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1292834015] [2020-10-13 23:42:34,654 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 23:42:34,654 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-13 23:42:34,655 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1212481675] [2020-10-13 23:42:34,661 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-13 23:42:34,661 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:42:34,676 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-13 23:42:34,677 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-13 23:42:34,680 INFO L87 Difference]: Start difference. First operand 32 states. Second operand 3 states. [2020-10-13 23:42:34,803 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:42:34,804 INFO L93 Difference]: Finished difference Result 56 states and 76 transitions. [2020-10-13 23:42:34,805 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-13 23:42:34,806 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 14 [2020-10-13 23:42:34,807 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:42:34,817 INFO L225 Difference]: With dead ends: 56 [2020-10-13 23:42:34,817 INFO L226 Difference]: Without dead ends: 27 [2020-10-13 23:42:34,821 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-13 23:42:34,839 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2020-10-13 23:42:34,860 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2020-10-13 23:42:34,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-10-13 23:42:34,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 32 transitions. [2020-10-13 23:42:34,864 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 32 transitions. Word has length 14 [2020-10-13 23:42:34,865 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:42:34,865 INFO L479 AbstractCegarLoop]: Abstraction has 27 states and 32 transitions. [2020-10-13 23:42:34,865 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-13 23:42:34,865 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 32 transitions. [2020-10-13 23:42:34,866 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-13 23:42:34,866 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:42:34,867 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:42:34,867 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-13 23:42:34,867 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:42:34,868 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:42:34,868 INFO L82 PathProgramCache]: Analyzing trace with hash -1137378726, now seen corresponding path program 1 times [2020-10-13 23:42:34,868 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:42:34,869 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1367365164] [2020-10-13 23:42:34,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:42:34,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:42:34,896 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:42:34,920 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:42:34,949 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:42:35,126 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:42:35,126 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 22 [2020-10-13 23:42:35,127 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 23:42:35,127 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 240 [2020-10-13 23:42:35,127 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:42:35,128 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:42:35,128 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 23:42:35,128 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 23:42:35,128 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 3 [2020-10-13 23:42:35,129 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:42:35,167 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:42:35,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:42:35,170 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:42:35,173 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:42:35,174 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:42:35,174 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:42:35,174 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-13 23:42:35,175 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:42:35,175 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:42:35,175 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:42:35,176 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:42:35,176 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:42:35,176 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:42:35,180 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 23:42:35,181 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1367365164] [2020-10-13 23:42:35,181 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 23:42:35,181 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-13 23:42:35,182 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [839325907] [2020-10-13 23:42:35,183 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-13 23:42:35,184 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:42:35,184 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-13 23:42:35,185 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-13 23:42:35,185 INFO L87 Difference]: Start difference. First operand 27 states and 32 transitions. Second operand 4 states. [2020-10-13 23:42:35,286 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:42:35,286 INFO L93 Difference]: Finished difference Result 46 states and 55 transitions. [2020-10-13 23:42:35,287 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-13 23:42:35,287 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 14 [2020-10-13 23:42:35,287 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:42:35,288 INFO L225 Difference]: With dead ends: 46 [2020-10-13 23:42:35,288 INFO L226 Difference]: Without dead ends: 30 [2020-10-13 23:42:35,290 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-13 23:42:35,290 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2020-10-13 23:42:35,296 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 28. [2020-10-13 23:42:35,296 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-10-13 23:42:35,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 33 transitions. [2020-10-13 23:42:35,298 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 33 transitions. Word has length 14 [2020-10-13 23:42:35,298 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:42:35,298 INFO L479 AbstractCegarLoop]: Abstraction has 28 states and 33 transitions. [2020-10-13 23:42:35,298 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-13 23:42:35,299 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 33 transitions. [2020-10-13 23:42:35,299 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-10-13 23:42:35,299 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:42:35,300 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:42:35,300 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-13 23:42:35,300 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:42:35,300 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:42:35,301 INFO L82 PathProgramCache]: Analyzing trace with hash 899733038, now seen corresponding path program 1 times [2020-10-13 23:42:35,301 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:42:35,301 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1978939014] [2020-10-13 23:42:35,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:42:35,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:42:35,316 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:42:35,332 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:42:35,433 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:42:35,699 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:42:35,700 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-10-13 23:42:35,700 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 23:42:35,700 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 388 [2020-10-13 23:42:35,700 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:42:35,701 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:42:35,701 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 23:42:35,701 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 23:42:35,701 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-13 23:42:35,701 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:42:35,730 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:42:35,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:42:35,732 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:42:35,735 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:42:35,736 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:42:35,736 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:42:35,736 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-13 23:42:35,736 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:42:35,737 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:42:35,737 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:42:35,737 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:42:35,737 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:42:35,737 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:42:35,743 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-13 23:42:35,744 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1978939014] [2020-10-13 23:42:35,744 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 23:42:35,744 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-13 23:42:35,745 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [684539910] [2020-10-13 23:42:35,745 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-13 23:42:35,746 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:42:35,746 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-13 23:42:35,747 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-13 23:42:35,748 INFO L87 Difference]: Start difference. First operand 28 states and 33 transitions. Second operand 4 states. [2020-10-13 23:42:35,875 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:42:35,876 INFO L93 Difference]: Finished difference Result 50 states and 60 transitions. [2020-10-13 23:42:35,877 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-13 23:42:35,877 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 17 [2020-10-13 23:42:35,877 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:42:35,878 INFO L225 Difference]: With dead ends: 50 [2020-10-13 23:42:35,878 INFO L226 Difference]: Without dead ends: 30 [2020-10-13 23:42:35,880 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-13 23:42:35,881 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2020-10-13 23:42:35,889 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 29. [2020-10-13 23:42:35,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2020-10-13 23:42:35,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 34 transitions. [2020-10-13 23:42:35,894 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 34 transitions. Word has length 17 [2020-10-13 23:42:35,894 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:42:35,895 INFO L479 AbstractCegarLoop]: Abstraction has 29 states and 34 transitions. [2020-10-13 23:42:35,895 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-13 23:42:35,895 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 34 transitions. [2020-10-13 23:42:35,897 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-10-13 23:42:35,898 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:42:35,898 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:42:35,898 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-13 23:42:35,898 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:42:35,899 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:42:35,899 INFO L82 PathProgramCache]: Analyzing trace with hash 1291417548, now seen corresponding path program 1 times [2020-10-13 23:42:35,899 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:42:35,900 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [594633328] [2020-10-13 23:42:35,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:42:35,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:42:35,926 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:42:35,943 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:42:36,035 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:42:36,392 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:42:36,392 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 27 [2020-10-13 23:42:36,393 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 23:42:36,393 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 471 [2020-10-13 23:42:36,394 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:42:36,394 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:42:36,395 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-13 23:42:36,395 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 23:42:36,395 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-13 23:42:36,396 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:42:36,440 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:42:36,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:42:36,443 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:42:36,447 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:42:36,448 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:42:36,448 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:42:36,448 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-13 23:42:36,448 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:42:36,448 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:42:36,449 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:42:36,449 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:42:36,450 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:42:36,451 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-13 23:42:36,455 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-13 23:42:36,457 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [594633328] [2020-10-13 23:42:36,458 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:42:36,458 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-13 23:42:36,465 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [426431127] [2020-10-13 23:42:36,465 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-13 23:42:36,465 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:42:36,466 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-13 23:42:36,466 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-13 23:42:36,466 INFO L87 Difference]: Start difference. First operand 29 states and 34 transitions. Second operand 5 states. [2020-10-13 23:42:36,618 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:42:36,619 INFO L93 Difference]: Finished difference Result 50 states and 60 transitions. [2020-10-13 23:42:36,619 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-13 23:42:36,620 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 19 [2020-10-13 23:42:36,620 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:42:36,621 INFO L225 Difference]: With dead ends: 50 [2020-10-13 23:42:36,621 INFO L226 Difference]: Without dead ends: 34 [2020-10-13 23:42:36,622 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-13 23:42:36,622 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2020-10-13 23:42:36,633 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 32. [2020-10-13 23:42:36,634 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2020-10-13 23:42:36,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 38 transitions. [2020-10-13 23:42:36,637 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 38 transitions. Word has length 19 [2020-10-13 23:42:36,637 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:42:36,638 INFO L479 AbstractCegarLoop]: Abstraction has 32 states and 38 transitions. [2020-10-13 23:42:36,638 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-13 23:42:36,638 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 38 transitions. [2020-10-13 23:42:36,640 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-13 23:42:36,640 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:42:36,640 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:42:36,641 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-13 23:42:36,641 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:42:36,641 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:42:36,642 INFO L82 PathProgramCache]: Analyzing trace with hash -144503940, now seen corresponding path program 2 times [2020-10-13 23:42:36,642 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:42:36,642 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1366085055] [2020-10-13 23:42:36,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:42:36,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:42:36,658 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:42:36,699 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:42:36,800 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:42:37,374 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:42:37,375 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 30 [2020-10-13 23:42:37,375 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 23:42:37,375 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 720 [2020-10-13 23:42:37,376 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:42:37,376 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:42:37,376 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-13 23:42:37,377 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 23:42:37,377 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 11 [2020-10-13 23:42:37,377 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:42:37,430 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:42:37,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:42:37,434 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:42:37,437 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:42:37,438 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:42:37,438 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:42:37,439 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-13 23:42:37,439 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:42:37,439 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:42:37,440 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:42:37,440 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:42:37,440 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:42:37,440 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:42:37,445 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-13 23:42:37,446 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1366085055] [2020-10-13 23:42:37,446 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:42:37,447 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-13 23:42:37,447 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1993391481] [2020-10-13 23:42:37,449 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-13 23:42:37,449 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:42:37,449 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-13 23:42:37,450 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-13 23:42:37,450 INFO L87 Difference]: Start difference. First operand 32 states and 38 transitions. Second operand 6 states. [2020-10-13 23:42:37,612 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:42:37,612 INFO L93 Difference]: Finished difference Result 53 states and 64 transitions. [2020-10-13 23:42:37,612 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-13 23:42:37,613 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 22 [2020-10-13 23:42:37,613 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:42:37,614 INFO L225 Difference]: With dead ends: 53 [2020-10-13 23:42:37,614 INFO L226 Difference]: Without dead ends: 37 [2020-10-13 23:42:37,617 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-13 23:42:37,618 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2020-10-13 23:42:37,627 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 35. [2020-10-13 23:42:37,628 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2020-10-13 23:42:37,631 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 42 transitions. [2020-10-13 23:42:37,632 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 42 transitions. Word has length 22 [2020-10-13 23:42:37,633 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:42:37,634 INFO L479 AbstractCegarLoop]: Abstraction has 35 states and 42 transitions. [2020-10-13 23:42:37,634 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-13 23:42:37,634 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 42 transitions. [2020-10-13 23:42:37,635 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-13 23:42:37,636 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:42:37,636 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:42:37,636 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-13 23:42:37,637 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:42:37,637 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:42:37,637 INFO L82 PathProgramCache]: Analyzing trace with hash 192715212, now seen corresponding path program 3 times [2020-10-13 23:42:37,638 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:42:37,638 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1290844662] [2020-10-13 23:42:37,638 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:42:37,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:42:37,660 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:42:37,694 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:42:37,871 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:42:38,754 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:42:38,754 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 33 [2020-10-13 23:42:38,754 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 23:42:38,755 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1098 [2020-10-13 23:42:38,755 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:42:38,755 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:42:38,755 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-13 23:42:38,755 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 23:42:38,757 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 4 [2020-10-13 23:42:38,760 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 5 [2020-10-13 23:42:38,787 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:42:38,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:42:38,790 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:42:38,793 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:42:38,793 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:42:38,793 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:42:38,793 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-13 23:42:38,794 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:42:38,794 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:42:38,794 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:42:38,794 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:42:38,795 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:42:38,795 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:42:38,798 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-10-13 23:42:38,799 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1290844662] [2020-10-13 23:42:38,800 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:42:38,800 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-13 23:42:38,803 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [424923475] [2020-10-13 23:42:38,804 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-13 23:42:38,805 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:42:38,805 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-13 23:42:38,805 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-13 23:42:38,805 INFO L87 Difference]: Start difference. First operand 35 states and 42 transitions. Second operand 5 states. [2020-10-13 23:42:38,897 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:42:38,897 INFO L93 Difference]: Finished difference Result 64 states and 78 transitions. [2020-10-13 23:42:38,898 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-13 23:42:38,898 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 25 [2020-10-13 23:42:38,898 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:42:38,899 INFO L225 Difference]: With dead ends: 64 [2020-10-13 23:42:38,899 INFO L226 Difference]: Without dead ends: 38 [2020-10-13 23:42:38,900 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-13 23:42:38,901 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2020-10-13 23:42:38,913 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 37. [2020-10-13 23:42:38,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2020-10-13 23:42:38,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 44 transitions. [2020-10-13 23:42:38,914 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 44 transitions. Word has length 25 [2020-10-13 23:42:38,914 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:42:38,915 INFO L479 AbstractCegarLoop]: Abstraction has 37 states and 44 transitions. [2020-10-13 23:42:38,915 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-13 23:42:38,915 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 44 transitions. [2020-10-13 23:42:38,917 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-13 23:42:38,917 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:42:38,917 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:42:38,918 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-13 23:42:38,918 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:42:38,918 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:42:38,918 INFO L82 PathProgramCache]: Analyzing trace with hash -689914518, now seen corresponding path program 4 times [2020-10-13 23:42:38,919 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:42:38,919 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1652846163] [2020-10-13 23:42:38,919 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:42:38,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:42:38,940 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:42:38,963 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:42:39,124 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:42:40,369 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:42:40,369 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 35 [2020-10-13 23:42:40,370 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 23:42:40,370 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1436 [2020-10-13 23:42:40,370 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:42:40,370 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:42:40,370 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-13 23:42:40,371 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 23:42:40,371 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-13 23:42:40,371 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:42:40,421 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:42:40,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:42:40,424 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:42:40,426 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:42:40,426 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:42:40,426 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:42:40,427 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 23:42:40,427 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:42:40,427 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:42:40,427 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:42:40,428 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:42:40,428 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:42:40,428 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:42:40,431 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-13 23:42:40,432 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1652846163] [2020-10-13 23:42:40,432 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:42:40,432 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-13 23:42:40,433 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [253650935] [2020-10-13 23:42:40,434 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-13 23:42:40,434 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:42:40,434 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-13 23:42:40,434 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-10-13 23:42:40,434 INFO L87 Difference]: Start difference. First operand 37 states and 44 transitions. Second operand 7 states. [2020-10-13 23:42:40,547 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:42:40,548 INFO L93 Difference]: Finished difference Result 58 states and 70 transitions. [2020-10-13 23:42:40,548 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-13 23:42:40,548 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 27 [2020-10-13 23:42:40,549 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:42:40,549 INFO L225 Difference]: With dead ends: 58 [2020-10-13 23:42:40,549 INFO L226 Difference]: Without dead ends: 42 [2020-10-13 23:42:40,550 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-10-13 23:42:40,551 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-10-13 23:42:40,555 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 40. [2020-10-13 23:42:40,555 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-10-13 23:42:40,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 48 transitions. [2020-10-13 23:42:40,557 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 48 transitions. Word has length 27 [2020-10-13 23:42:40,557 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:42:40,557 INFO L479 AbstractCegarLoop]: Abstraction has 40 states and 48 transitions. [2020-10-13 23:42:40,557 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-13 23:42:40,557 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 48 transitions. [2020-10-13 23:42:40,558 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-10-13 23:42:40,558 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:42:40,558 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:42:40,559 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-13 23:42:40,559 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:42:40,559 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:42:40,559 INFO L82 PathProgramCache]: Analyzing trace with hash -272533218, now seen corresponding path program 5 times [2020-10-13 23:42:40,559 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:42:40,560 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1141125070] [2020-10-13 23:42:40,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:42:40,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:42:40,576 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:42:40,599 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:42:40,773 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:42:42,689 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:42:42,690 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 38 [2020-10-13 23:42:42,690 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 23:42:42,690 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2119 [2020-10-13 23:42:42,690 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:42:42,691 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:42:42,691 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-13 23:42:42,691 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 23:42:42,691 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-13 23:42:42,691 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:42:42,724 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:42:42,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:42:42,727 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:42:42,728 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:42:42,728 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:42:42,729 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:42:42,729 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 23:42:42,729 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:42:42,729 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:42:42,730 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:42:42,730 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:42:42,730 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:42:42,730 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:42:42,733 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2020-10-13 23:42:42,733 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1141125070] [2020-10-13 23:42:42,734 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:42:42,734 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-13 23:42:42,734 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [814721999] [2020-10-13 23:42:42,735 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-13 23:42:42,735 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:42:42,735 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-13 23:42:42,735 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-13 23:42:42,736 INFO L87 Difference]: Start difference. First operand 40 states and 48 transitions. Second operand 6 states. [2020-10-13 23:42:42,840 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:42:42,840 INFO L93 Difference]: Finished difference Result 72 states and 88 transitions. [2020-10-13 23:42:42,840 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-13 23:42:42,841 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 30 [2020-10-13 23:42:42,841 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:42:42,842 INFO L225 Difference]: With dead ends: 72 [2020-10-13 23:42:42,842 INFO L226 Difference]: Without dead ends: 43 [2020-10-13 23:42:42,844 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-13 23:42:42,845 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2020-10-13 23:42:42,855 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 42. [2020-10-13 23:42:42,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-10-13 23:42:42,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 50 transitions. [2020-10-13 23:42:42,859 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 50 transitions. Word has length 30 [2020-10-13 23:42:42,859 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:42:42,859 INFO L479 AbstractCegarLoop]: Abstraction has 42 states and 50 transitions. [2020-10-13 23:42:42,860 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-13 23:42:42,860 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 50 transitions. [2020-10-13 23:42:42,860 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-10-13 23:42:42,861 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:42:42,861 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:42:42,863 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-13 23:42:42,863 INFO L427 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:42:42,864 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:42:42,864 INFO L82 PathProgramCache]: Analyzing trace with hash 1780017216, now seen corresponding path program 6 times [2020-10-13 23:42:42,866 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:42:42,867 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [608554275] [2020-10-13 23:42:42,867 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:42:42,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:42:42,891 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:42:42,910 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:42:43,241 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:42:45,759 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:42:45,760 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 40 [2020-10-13 23:42:45,760 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 23:42:45,760 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2875 [2020-10-13 23:42:45,761 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:42:45,761 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:42:45,761 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-13 23:42:45,762 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 23:42:45,762 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 21 [2020-10-13 23:42:45,762 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:42:45,826 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:42:45,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:42:45,828 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:42:45,830 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:42:45,830 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:42:45,830 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:42:45,830 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:42:45,831 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:42:45,831 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:42:45,831 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:42:45,831 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:42:45,832 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:42:45,832 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:42:45,835 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-10-13 23:42:45,840 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [608554275] [2020-10-13 23:42:45,841 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:42:45,841 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-13 23:42:45,842 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1790044311] [2020-10-13 23:42:45,842 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-13 23:42:45,842 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:42:45,843 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-13 23:42:45,844 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-10-13 23:42:45,844 INFO L87 Difference]: Start difference. First operand 42 states and 50 transitions. Second operand 8 states. [2020-10-13 23:42:45,970 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:42:45,970 INFO L93 Difference]: Finished difference Result 63 states and 76 transitions. [2020-10-13 23:42:45,971 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-13 23:42:45,971 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 32 [2020-10-13 23:42:45,971 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:42:45,972 INFO L225 Difference]: With dead ends: 63 [2020-10-13 23:42:45,972 INFO L226 Difference]: Without dead ends: 47 [2020-10-13 23:42:45,975 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-10-13 23:42:45,975 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2020-10-13 23:42:45,984 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 45. [2020-10-13 23:42:45,984 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-10-13 23:42:45,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 54 transitions. [2020-10-13 23:42:45,985 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 54 transitions. Word has length 32 [2020-10-13 23:42:45,987 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:42:45,987 INFO L479 AbstractCegarLoop]: Abstraction has 45 states and 54 transitions. [2020-10-13 23:42:45,987 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-13 23:42:45,987 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 54 transitions. [2020-10-13 23:42:45,988 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-10-13 23:42:45,988 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:42:45,988 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:42:45,989 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-13 23:42:45,989 INFO L427 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:42:45,989 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:42:45,989 INFO L82 PathProgramCache]: Analyzing trace with hash 84039304, now seen corresponding path program 7 times [2020-10-13 23:42:45,989 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:42:45,990 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1794425418] [2020-10-13 23:42:45,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:42:46,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:42:46,017 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:42:46,050 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:42:46,403 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:42:49,522 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:42:49,523 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 43 [2020-10-13 23:42:49,523 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 23:42:49,524 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3513 [2020-10-13 23:42:49,524 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:42:49,524 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:42:49,525 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-13 23:42:49,525 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 23:42:49,525 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-10-13 23:42:49,526 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:42:49,621 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:42:49,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:42:49,623 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:42:49,625 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:42:49,625 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:42:49,625 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:42:49,625 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 23:42:49,626 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:42:49,626 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:42:49,626 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:42:49,627 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:42:49,627 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:42:49,627 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:42:49,631 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-10-13 23:42:49,631 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1794425418] [2020-10-13 23:42:49,632 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:42:49,632 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-13 23:42:49,632 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1855405613] [2020-10-13 23:42:49,632 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-13 23:42:49,633 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:42:49,633 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-13 23:42:49,633 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-10-13 23:42:49,633 INFO L87 Difference]: Start difference. First operand 45 states and 54 transitions. Second operand 9 states. [2020-10-13 23:42:49,772 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:42:49,772 INFO L93 Difference]: Finished difference Result 66 states and 80 transitions. [2020-10-13 23:42:49,773 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-13 23:42:49,773 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 35 [2020-10-13 23:42:49,773 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:42:49,775 INFO L225 Difference]: With dead ends: 66 [2020-10-13 23:42:49,775 INFO L226 Difference]: Without dead ends: 50 [2020-10-13 23:42:49,776 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-10-13 23:42:49,776 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2020-10-13 23:42:49,784 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 48. [2020-10-13 23:42:49,784 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-10-13 23:42:49,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 58 transitions. [2020-10-13 23:42:49,786 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 58 transitions. Word has length 35 [2020-10-13 23:42:49,787 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:42:49,787 INFO L479 AbstractCegarLoop]: Abstraction has 48 states and 58 transitions. [2020-10-13 23:42:49,787 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-13 23:42:49,787 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 58 transitions. [2020-10-13 23:42:49,791 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-10-13 23:42:49,791 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:42:49,792 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:42:49,792 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-13 23:42:49,792 INFO L427 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:42:49,792 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:42:49,793 INFO L82 PathProgramCache]: Analyzing trace with hash 1201333056, now seen corresponding path program 8 times [2020-10-13 23:42:49,793 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:42:49,793 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1614551638] [2020-10-13 23:42:49,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:42:49,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:42:49,816 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:42:49,836 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:42:50,390 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:42:53,928 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:42:53,929 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 46 [2020-10-13 23:42:53,929 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 23:42:53,929 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4116 [2020-10-13 23:42:53,929 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:42:53,929 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:42:53,930 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-13 23:42:53,930 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 23:42:53,930 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-13 23:42:53,930 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:42:53,978 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:42:53,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:42:53,980 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:42:53,986 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:42:53,987 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:42:53,987 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:42:53,987 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-13 23:42:53,987 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:42:53,988 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:42:53,988 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:42:53,989 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:42:53,989 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:42:53,989 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:42:53,992 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2020-10-13 23:42:53,992 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1614551638] [2020-10-13 23:42:53,992 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:42:53,992 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-13 23:42:53,993 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [674570709] [2020-10-13 23:42:53,993 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-13 23:42:53,993 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:42:53,993 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-13 23:42:53,994 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-10-13 23:42:53,995 INFO L87 Difference]: Start difference. First operand 48 states and 58 transitions. Second operand 7 states. [2020-10-13 23:42:54,084 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:42:54,084 INFO L93 Difference]: Finished difference Result 86 states and 106 transitions. [2020-10-13 23:42:54,085 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-13 23:42:54,085 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 38 [2020-10-13 23:42:54,085 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:42:54,086 INFO L225 Difference]: With dead ends: 86 [2020-10-13 23:42:54,086 INFO L226 Difference]: Without dead ends: 51 [2020-10-13 23:42:54,088 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-10-13 23:42:54,089 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2020-10-13 23:42:54,094 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 50. [2020-10-13 23:42:54,094 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-10-13 23:42:54,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 60 transitions. [2020-10-13 23:42:54,095 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 60 transitions. Word has length 38 [2020-10-13 23:42:54,095 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:42:54,095 INFO L479 AbstractCegarLoop]: Abstraction has 50 states and 60 transitions. [2020-10-13 23:42:54,096 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-13 23:42:54,096 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 60 transitions. [2020-10-13 23:42:54,096 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-10-13 23:42:54,096 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:42:54,096 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:42:54,097 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-13 23:42:54,097 INFO L427 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:42:54,097 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:42:54,097 INFO L82 PathProgramCache]: Analyzing trace with hash -668331934, now seen corresponding path program 9 times [2020-10-13 23:42:54,098 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:42:54,098 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1188894647] [2020-10-13 23:42:54,098 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:42:54,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:42:54,110 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:42:54,129 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:42:54,595 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:42:58,284 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:42:58,285 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 48 [2020-10-13 23:42:58,285 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 23:42:58,285 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4178 [2020-10-13 23:42:58,285 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:42:58,285 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:42:58,285 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-13 23:42:58,285 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 23:42:58,286 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 29 [2020-10-13 23:42:58,286 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:42:58,363 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:42:58,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:42:58,365 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:42:58,366 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:42:58,366 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:42:58,366 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:42:58,366 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:42:58,367 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:42:58,367 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:42:58,367 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:42:58,367 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:42:58,367 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:42:58,368 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:42:58,371 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2020-10-13 23:42:58,371 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1188894647] [2020-10-13 23:42:58,371 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:42:58,372 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-13 23:42:58,372 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1428559958] [2020-10-13 23:42:58,372 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-13 23:42:58,372 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:42:58,373 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-13 23:42:58,373 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2020-10-13 23:42:58,373 INFO L87 Difference]: Start difference. First operand 50 states and 60 transitions. Second operand 10 states. [2020-10-13 23:42:58,495 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:42:58,495 INFO L93 Difference]: Finished difference Result 71 states and 86 transitions. [2020-10-13 23:42:58,495 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-13 23:42:58,495 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 40 [2020-10-13 23:42:58,496 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:42:58,496 INFO L225 Difference]: With dead ends: 71 [2020-10-13 23:42:58,497 INFO L226 Difference]: Without dead ends: 55 [2020-10-13 23:42:58,497 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2020-10-13 23:42:58,498 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2020-10-13 23:42:58,501 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 53. [2020-10-13 23:42:58,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2020-10-13 23:42:58,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 64 transitions. [2020-10-13 23:42:58,502 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 64 transitions. Word has length 40 [2020-10-13 23:42:58,503 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:42:58,503 INFO L479 AbstractCegarLoop]: Abstraction has 53 states and 64 transitions. [2020-10-13 23:42:58,503 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-13 23:42:58,503 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 64 transitions. [2020-10-13 23:42:58,504 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-10-13 23:42:58,504 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:42:58,504 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:42:58,504 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-13 23:42:58,504 INFO L427 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:42:58,505 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:42:58,505 INFO L82 PathProgramCache]: Analyzing trace with hash -1550867674, now seen corresponding path program 10 times [2020-10-13 23:42:58,505 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:42:58,505 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2133321421] [2020-10-13 23:42:58,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:42:58,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:42:58,518 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:42:58,531 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:42:58,863 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:43:02,720 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:43:02,721 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 51 [2020-10-13 23:43:02,721 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 23:43:02,721 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4206 [2020-10-13 23:43:02,721 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:43:02,721 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:43:02,721 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-13 23:43:02,721 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 23:43:02,721 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-13 23:43:02,722 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:43:02,774 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:43:02,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:43:02,775 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:43:02,776 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:43:02,777 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:43:02,777 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:43:02,778 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:43:02,778 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:43:02,778 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:43:02,778 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:43:02,778 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:43:02,779 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:43:02,779 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:43:02,782 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2020-10-13 23:43:02,783 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2133321421] [2020-10-13 23:43:02,783 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:43:02,783 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-13 23:43:02,783 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1947760097] [2020-10-13 23:43:02,784 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-13 23:43:02,784 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:43:02,785 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-13 23:43:02,785 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-10-13 23:43:02,785 INFO L87 Difference]: Start difference. First operand 53 states and 64 transitions. Second operand 8 states. [2020-10-13 23:43:02,880 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:43:02,880 INFO L93 Difference]: Finished difference Result 94 states and 116 transitions. [2020-10-13 23:43:02,881 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-13 23:43:02,881 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 43 [2020-10-13 23:43:02,881 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:43:02,882 INFO L225 Difference]: With dead ends: 94 [2020-10-13 23:43:02,882 INFO L226 Difference]: Without dead ends: 56 [2020-10-13 23:43:02,883 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-10-13 23:43:02,884 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2020-10-13 23:43:02,896 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 55. [2020-10-13 23:43:02,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2020-10-13 23:43:02,897 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 66 transitions. [2020-10-13 23:43:02,897 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 66 transitions. Word has length 43 [2020-10-13 23:43:02,898 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:43:02,898 INFO L479 AbstractCegarLoop]: Abstraction has 55 states and 66 transitions. [2020-10-13 23:43:02,898 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-13 23:43:02,898 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 66 transitions. [2020-10-13 23:43:02,899 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-10-13 23:43:02,899 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:43:02,899 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:43:02,899 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-13 23:43:02,899 INFO L427 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:43:02,900 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:43:02,900 INFO L82 PathProgramCache]: Analyzing trace with hash 410606404, now seen corresponding path program 11 times [2020-10-13 23:43:02,901 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:43:02,901 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1206409300] [2020-10-13 23:43:02,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:43:02,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:43:02,918 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:43:02,938 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:43:03,543 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:43:07,916 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:43:07,916 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 53 [2020-10-13 23:43:07,916 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 23:43:07,917 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-13 23:43:07,917 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:43:07,917 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:43:07,917 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-13 23:43:07,917 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 23:43:07,917 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 34 [2020-10-13 23:43:07,917 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:43:08,003 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:43:08,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:43:08,005 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:43:08,006 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:43:08,007 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:43:08,007 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:43:08,007 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:43:08,007 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:43:08,007 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:43:08,008 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:43:08,008 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:43:08,008 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:43:08,008 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:43:08,011 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2020-10-13 23:43:08,012 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1206409300] [2020-10-13 23:43:08,012 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:43:08,012 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-13 23:43:08,012 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1922304805] [2020-10-13 23:43:08,013 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-13 23:43:08,013 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:43:08,013 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-13 23:43:08,014 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2020-10-13 23:43:08,014 INFO L87 Difference]: Start difference. First operand 55 states and 66 transitions. Second operand 11 states. [2020-10-13 23:43:08,151 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:43:08,151 INFO L93 Difference]: Finished difference Result 76 states and 92 transitions. [2020-10-13 23:43:08,152 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-13 23:43:08,152 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 45 [2020-10-13 23:43:08,152 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:43:08,153 INFO L225 Difference]: With dead ends: 76 [2020-10-13 23:43:08,153 INFO L226 Difference]: Without dead ends: 60 [2020-10-13 23:43:08,154 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2020-10-13 23:43:08,154 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2020-10-13 23:43:08,158 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 58. [2020-10-13 23:43:08,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-10-13 23:43:08,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 70 transitions. [2020-10-13 23:43:08,158 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 70 transitions. Word has length 45 [2020-10-13 23:43:08,159 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:43:08,159 INFO L479 AbstractCegarLoop]: Abstraction has 58 states and 70 transitions. [2020-10-13 23:43:08,159 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-13 23:43:08,159 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 70 transitions. [2020-10-13 23:43:08,160 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-10-13 23:43:08,160 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:43:08,160 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:43:08,160 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-13 23:43:08,160 INFO L427 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:43:08,161 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:43:08,161 INFO L82 PathProgramCache]: Analyzing trace with hash 1860883716, now seen corresponding path program 12 times [2020-10-13 23:43:08,161 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:43:08,161 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [890192458] [2020-10-13 23:43:08,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:43:08,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:43:08,175 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:43:08,190 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:43:08,748 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:43:13,177 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:43:13,177 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 56 [2020-10-13 23:43:13,177 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 23:43:13,177 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5006 [2020-10-13 23:43:13,177 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:43:13,177 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:43:13,178 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-13 23:43:13,178 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 23:43:13,178 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-13 23:43:13,178 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:43:13,243 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:43:13,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:43:13,245 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:43:13,246 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:43:13,246 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:43:13,246 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:43:13,246 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:43:13,247 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:43:13,247 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:43:13,247 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:43:13,247 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:43:13,247 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:43:13,247 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:43:13,250 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 92 trivial. 0 not checked. [2020-10-13 23:43:13,251 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [890192458] [2020-10-13 23:43:13,251 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:43:13,251 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-13 23:43:13,251 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2086587367] [2020-10-13 23:43:13,252 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-13 23:43:13,252 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:43:13,252 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-13 23:43:13,252 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-10-13 23:43:13,253 INFO L87 Difference]: Start difference. First operand 58 states and 70 transitions. Second operand 9 states. [2020-10-13 23:43:13,342 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:43:13,342 INFO L93 Difference]: Finished difference Result 102 states and 126 transitions. [2020-10-13 23:43:13,342 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-13 23:43:13,342 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 48 [2020-10-13 23:43:13,343 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:43:13,343 INFO L225 Difference]: With dead ends: 102 [2020-10-13 23:43:13,344 INFO L226 Difference]: Without dead ends: 61 [2020-10-13 23:43:13,345 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-10-13 23:43:13,345 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2020-10-13 23:43:13,352 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 60. [2020-10-13 23:43:13,353 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2020-10-13 23:43:13,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 72 transitions. [2020-10-13 23:43:13,355 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 72 transitions. Word has length 48 [2020-10-13 23:43:13,356 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:43:13,356 INFO L479 AbstractCegarLoop]: Abstraction has 60 states and 72 transitions. [2020-10-13 23:43:13,356 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-13 23:43:13,356 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 72 transitions. [2020-10-13 23:43:13,356 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2020-10-13 23:43:13,357 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:43:13,357 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:43:13,357 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-13 23:43:13,357 INFO L427 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:43:13,357 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:43:13,358 INFO L82 PathProgramCache]: Analyzing trace with hash -763002970, now seen corresponding path program 13 times [2020-10-13 23:43:13,358 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:43:13,358 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1697429679] [2020-10-13 23:43:13,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:43:13,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:43:13,371 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:43:13,389 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:43:14,136 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:43:18,367 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:43:18,367 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 58 [2020-10-13 23:43:18,368 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 23:43:18,368 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-13 23:43:18,368 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:43:18,368 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:43:18,368 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-13 23:43:18,369 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 23:43:18,369 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 39 [2020-10-13 23:43:18,369 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:43:18,468 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:43:18,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:43:18,469 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:43:18,471 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:43:18,471 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:43:18,471 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:43:18,472 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:43:18,472 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:43:18,472 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:43:18,472 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:43:18,472 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:43:18,472 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:43:18,473 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:43:18,480 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 0 proven. 92 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2020-10-13 23:43:18,480 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1697429679] [2020-10-13 23:43:18,480 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:43:18,480 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-13 23:43:18,481 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1052883590] [2020-10-13 23:43:18,481 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-13 23:43:18,481 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:43:18,481 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-13 23:43:18,482 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2020-10-13 23:43:18,482 INFO L87 Difference]: Start difference. First operand 60 states and 72 transitions. Second operand 12 states. [2020-10-13 23:43:18,627 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:43:18,628 INFO L93 Difference]: Finished difference Result 81 states and 98 transitions. [2020-10-13 23:43:18,628 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-13 23:43:18,628 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 50 [2020-10-13 23:43:18,628 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:43:18,629 INFO L225 Difference]: With dead ends: 81 [2020-10-13 23:43:18,629 INFO L226 Difference]: Without dead ends: 65 [2020-10-13 23:43:18,630 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2020-10-13 23:43:18,630 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2020-10-13 23:43:18,634 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 63. [2020-10-13 23:43:18,634 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2020-10-13 23:43:18,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 76 transitions. [2020-10-13 23:43:18,635 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 76 transitions. Word has length 50 [2020-10-13 23:43:18,635 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:43:18,635 INFO L479 AbstractCegarLoop]: Abstraction has 63 states and 76 transitions. [2020-10-13 23:43:18,635 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-13 23:43:18,636 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 76 transitions. [2020-10-13 23:43:18,636 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-10-13 23:43:18,636 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:43:18,636 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 9, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:43:18,636 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-13 23:43:18,637 INFO L427 AbstractCegarLoop]: === Iteration 17 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:43:18,637 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:43:18,637 INFO L82 PathProgramCache]: Analyzing trace with hash -102187678, now seen corresponding path program 14 times [2020-10-13 23:43:18,637 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:43:18,637 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2041402833] [2020-10-13 23:43:18,638 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:43:18,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:43:18,649 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:43:18,659 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:43:19,528 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:43:23,651 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:43:23,652 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 61 [2020-10-13 23:43:23,652 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 23:43:23,652 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-10-13 23:43:23,652 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:43:23,652 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:43:23,652 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-13 23:43:23,652 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 23:43:23,652 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 42 [2020-10-13 23:43:23,653 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:43:23,763 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:43:23,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:43:23,765 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:43:23,766 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:43:23,766 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:43:23,766 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:43:23,766 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:43:23,767 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:43:23,767 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:43:23,767 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:43:23,767 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:43:23,767 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:43:23,767 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:43:23,771 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 0 proven. 117 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2020-10-13 23:43:23,772 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2041402833] [2020-10-13 23:43:23,772 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:43:23,772 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-13 23:43:23,772 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1371483884] [2020-10-13 23:43:23,773 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-13 23:43:23,773 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:43:23,773 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-13 23:43:23,774 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2020-10-13 23:43:23,774 INFO L87 Difference]: Start difference. First operand 63 states and 76 transitions. Second operand 13 states. [2020-10-13 23:43:23,910 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:43:23,910 INFO L93 Difference]: Finished difference Result 84 states and 102 transitions. [2020-10-13 23:43:23,911 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-13 23:43:23,911 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 53 [2020-10-13 23:43:23,911 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:43:23,912 INFO L225 Difference]: With dead ends: 84 [2020-10-13 23:43:23,912 INFO L226 Difference]: Without dead ends: 68 [2020-10-13 23:43:23,913 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2020-10-13 23:43:23,914 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2020-10-13 23:43:23,917 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 66. [2020-10-13 23:43:23,917 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-10-13 23:43:23,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 80 transitions. [2020-10-13 23:43:23,918 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 80 transitions. Word has length 53 [2020-10-13 23:43:23,919 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:43:23,919 INFO L479 AbstractCegarLoop]: Abstraction has 66 states and 80 transitions. [2020-10-13 23:43:23,919 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-13 23:43:23,919 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 80 transitions. [2020-10-13 23:43:23,919 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-10-13 23:43:23,919 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:43:23,920 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 10, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:43:23,920 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-13 23:43:23,920 INFO L427 AbstractCegarLoop]: === Iteration 18 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:43:23,920 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:43:23,920 INFO L82 PathProgramCache]: Analyzing trace with hash -1883908570, now seen corresponding path program 15 times [2020-10-13 23:43:23,921 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:43:23,921 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1798821613] [2020-10-13 23:43:23,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:43:23,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:43:23,931 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:43:23,942 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:43:24,971 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:43:28,928 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:43:28,928 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 64 [2020-10-13 23:43:28,929 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 23:43:28,929 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4999 [2020-10-13 23:43:28,929 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:43:28,929 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:43:28,929 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-13 23:43:28,929 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 23:43:28,929 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-13 23:43:28,929 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:43:28,992 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:43:28,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:43:28,995 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:43:28,996 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:43:28,996 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:43:28,996 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:43:28,996 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:43:28,996 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:43:28,997 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:43:28,997 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:43:28,997 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:43:28,997 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:43:28,997 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:43:29,003 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2020-10-13 23:43:29,003 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1798821613] [2020-10-13 23:43:29,004 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:43:29,004 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-13 23:43:29,008 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [485161857] [2020-10-13 23:43:29,011 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-13 23:43:29,012 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:43:29,012 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-13 23:43:29,012 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2020-10-13 23:43:29,013 INFO L87 Difference]: Start difference. First operand 66 states and 80 transitions. Second operand 10 states. [2020-10-13 23:43:29,131 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:43:29,131 INFO L93 Difference]: Finished difference Result 116 states and 144 transitions. [2020-10-13 23:43:29,132 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-13 23:43:29,132 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 56 [2020-10-13 23:43:29,132 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:43:29,133 INFO L225 Difference]: With dead ends: 116 [2020-10-13 23:43:29,133 INFO L226 Difference]: Without dead ends: 69 [2020-10-13 23:43:29,135 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2020-10-13 23:43:29,135 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2020-10-13 23:43:29,143 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 68. [2020-10-13 23:43:29,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2020-10-13 23:43:29,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 82 transitions. [2020-10-13 23:43:29,145 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 82 transitions. Word has length 56 [2020-10-13 23:43:29,146 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:43:29,146 INFO L479 AbstractCegarLoop]: Abstraction has 68 states and 82 transitions. [2020-10-13 23:43:29,146 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-13 23:43:29,146 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 82 transitions. [2020-10-13 23:43:29,147 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-10-13 23:43:29,147 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:43:29,147 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 10, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:43:29,147 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-13 23:43:29,147 INFO L427 AbstractCegarLoop]: === Iteration 19 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:43:29,147 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:43:29,148 INFO L82 PathProgramCache]: Analyzing trace with hash -28000568, now seen corresponding path program 16 times [2020-10-13 23:43:29,148 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:43:29,148 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1982767126] [2020-10-13 23:43:29,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:43:29,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:43:29,159 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:43:29,172 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:43:30,390 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:43:34,160 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:43:34,160 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 66 [2020-10-13 23:43:34,160 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 23:43:34,160 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-13 23:43:34,160 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:43:34,161 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:43:34,161 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-13 23:43:34,161 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 23:43:34,161 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 47 [2020-10-13 23:43:34,161 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:43:34,311 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:43:34,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:43:34,313 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:43:34,314 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:43:34,315 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:43:34,315 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:43:34,315 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:43:34,315 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:43:34,316 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:43:34,316 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:43:34,316 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:43:34,316 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:43:34,316 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:43:34,322 INFO L134 CoverageAnalysis]: Checked inductivity of 194 backedges. 0 proven. 145 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2020-10-13 23:43:34,322 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1982767126] [2020-10-13 23:43:34,322 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:43:34,323 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-13 23:43:34,323 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [191212044] [2020-10-13 23:43:34,325 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-13 23:43:34,325 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:43:34,326 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-13 23:43:34,326 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2020-10-13 23:43:34,326 INFO L87 Difference]: Start difference. First operand 68 states and 82 transitions. Second operand 14 states. [2020-10-13 23:43:34,496 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:43:34,496 INFO L93 Difference]: Finished difference Result 89 states and 108 transitions. [2020-10-13 23:43:34,496 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-13 23:43:34,497 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 58 [2020-10-13 23:43:34,497 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:43:34,498 INFO L225 Difference]: With dead ends: 89 [2020-10-13 23:43:34,498 INFO L226 Difference]: Without dead ends: 73 [2020-10-13 23:43:34,499 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2020-10-13 23:43:34,500 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2020-10-13 23:43:34,508 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 71. [2020-10-13 23:43:34,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2020-10-13 23:43:34,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 86 transitions. [2020-10-13 23:43:34,510 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 86 transitions. Word has length 58 [2020-10-13 23:43:34,510 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:43:34,510 INFO L479 AbstractCegarLoop]: Abstraction has 71 states and 86 transitions. [2020-10-13 23:43:34,510 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-13 23:43:34,510 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 86 transitions. [2020-10-13 23:43:34,511 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-10-13 23:43:34,511 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:43:34,512 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 11, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:43:34,512 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-13 23:43:34,512 INFO L427 AbstractCegarLoop]: === Iteration 20 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:43:34,512 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:43:34,513 INFO L82 PathProgramCache]: Analyzing trace with hash 611095296, now seen corresponding path program 17 times [2020-10-13 23:43:34,513 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:43:34,513 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1604038805] [2020-10-13 23:43:34,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:43:34,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:43:34,544 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:43:34,568 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:43:36,209 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:43:39,544 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:43:39,544 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 69 [2020-10-13 23:43:39,544 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 23:43:39,544 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-13 23:43:39,545 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:43:39,545 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:43:39,545 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-13 23:43:39,545 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 23:43:39,545 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-13 23:43:39,545 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:43:39,612 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:43:39,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:43:39,614 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:43:39,615 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:43:39,615 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:43:39,616 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:43:39,616 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:43:39,616 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:43:39,616 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:43:39,617 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:43:39,617 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:43:39,617 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:43:39,617 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:43:39,621 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 176 trivial. 0 not checked. [2020-10-13 23:43:39,621 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1604038805] [2020-10-13 23:43:39,621 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:43:39,622 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-13 23:43:39,622 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1205143501] [2020-10-13 23:43:39,622 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-13 23:43:39,622 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:43:39,623 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-13 23:43:39,623 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2020-10-13 23:43:39,623 INFO L87 Difference]: Start difference. First operand 71 states and 86 transitions. Second operand 11 states. [2020-10-13 23:43:39,765 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:43:39,766 INFO L93 Difference]: Finished difference Result 124 states and 154 transitions. [2020-10-13 23:43:39,766 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-13 23:43:39,767 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 61 [2020-10-13 23:43:39,767 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:43:39,768 INFO L225 Difference]: With dead ends: 124 [2020-10-13 23:43:39,768 INFO L226 Difference]: Without dead ends: 74 [2020-10-13 23:43:39,769 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2020-10-13 23:43:39,770 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2020-10-13 23:43:39,773 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 73. [2020-10-13 23:43:39,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2020-10-13 23:43:39,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 88 transitions. [2020-10-13 23:43:39,775 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 88 transitions. Word has length 61 [2020-10-13 23:43:39,777 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:43:39,777 INFO L479 AbstractCegarLoop]: Abstraction has 73 states and 88 transitions. [2020-10-13 23:43:39,777 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-13 23:43:39,777 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 88 transitions. [2020-10-13 23:43:39,783 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-10-13 23:43:39,784 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:43:39,786 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 11, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:43:39,786 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-10-13 23:43:39,787 INFO L427 AbstractCegarLoop]: === Iteration 21 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:43:39,787 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:43:39,787 INFO L82 PathProgramCache]: Analyzing trace with hash 558874526, now seen corresponding path program 18 times [2020-10-13 23:43:39,787 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:43:39,788 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [807497379] [2020-10-13 23:43:39,788 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:43:39,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:43:39,806 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:43:39,839 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:43:42,139 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:43:44,801 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:43:44,801 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 71 [2020-10-13 23:43:44,801 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 23:43:44,802 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-13 23:43:44,802 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:43:44,802 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:43:44,802 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-13 23:43:44,802 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 23:43:44,802 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 52 [2020-10-13 23:43:44,802 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:43:44,945 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:43:44,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:43:44,947 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:43:44,948 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:43:44,948 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:43:44,948 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:43:44,948 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:43:44,948 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:43:44,948 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:43:44,949 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:43:44,949 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:43:44,949 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:43:44,949 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:43:44,957 INFO L134 CoverageAnalysis]: Checked inductivity of 240 backedges. 0 proven. 176 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2020-10-13 23:43:44,958 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [807497379] [2020-10-13 23:43:44,958 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:43:44,958 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-13 23:43:44,958 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [926881322] [2020-10-13 23:43:44,960 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-13 23:43:44,960 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:43:44,962 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-13 23:43:44,962 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210 [2020-10-13 23:43:44,962 INFO L87 Difference]: Start difference. First operand 73 states and 88 transitions. Second operand 15 states. [2020-10-13 23:43:45,144 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:43:45,144 INFO L93 Difference]: Finished difference Result 94 states and 114 transitions. [2020-10-13 23:43:45,145 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-13 23:43:45,145 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 63 [2020-10-13 23:43:45,145 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:43:45,146 INFO L225 Difference]: With dead ends: 94 [2020-10-13 23:43:45,146 INFO L226 Difference]: Without dead ends: 78 [2020-10-13 23:43:45,146 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210 [2020-10-13 23:43:45,147 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2020-10-13 23:43:45,150 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 76. [2020-10-13 23:43:45,150 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2020-10-13 23:43:45,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 92 transitions. [2020-10-13 23:43:45,152 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 92 transitions. Word has length 63 [2020-10-13 23:43:45,153 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:43:45,153 INFO L479 AbstractCegarLoop]: Abstraction has 76 states and 92 transitions. [2020-10-13 23:43:45,153 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-13 23:43:45,153 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 92 transitions. [2020-10-13 23:43:45,154 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-10-13 23:43:45,154 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:43:45,154 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 12, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:43:45,154 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-10-13 23:43:45,154 INFO L427 AbstractCegarLoop]: === Iteration 22 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:43:45,154 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:43:45,155 INFO L82 PathProgramCache]: Analyzing trace with hash -604841366, now seen corresponding path program 19 times [2020-10-13 23:43:45,155 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:43:45,156 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2138495847] [2020-10-13 23:43:45,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:43:45,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:43:45,174 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:43:45,193 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:43:47,190 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:43:50,173 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:43:50,173 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 74 [2020-10-13 23:43:50,173 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 23:43:50,173 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-13 23:43:50,173 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:43:50,174 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:43:50,174 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-13 23:43:50,174 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 23:43:50,174 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 55 [2020-10-13 23:43:50,174 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:43:50,317 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:43:50,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:43:50,319 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:43:50,321 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:43:50,321 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:43:50,321 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:43:50,321 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:43:50,321 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:43:50,322 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:43:50,322 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:43:50,322 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:43:50,322 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:43:50,322 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:43:50,327 INFO L134 CoverageAnalysis]: Checked inductivity of 274 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2020-10-13 23:43:50,327 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2138495847] [2020-10-13 23:43:50,327 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:43:50,327 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-13 23:43:50,327 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1809153466] [2020-10-13 23:43:50,328 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-13 23:43:50,328 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:43:50,328 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-13 23:43:50,328 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=133, Unknown=0, NotChecked=0, Total=240 [2020-10-13 23:43:50,328 INFO L87 Difference]: Start difference. First operand 76 states and 92 transitions. Second operand 16 states. [2020-10-13 23:43:50,522 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:43:50,523 INFO L93 Difference]: Finished difference Result 97 states and 118 transitions. [2020-10-13 23:43:50,524 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-13 23:43:50,525 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 66 [2020-10-13 23:43:50,525 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:43:50,526 INFO L225 Difference]: With dead ends: 97 [2020-10-13 23:43:50,526 INFO L226 Difference]: Without dead ends: 81 [2020-10-13 23:43:50,527 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=107, Invalid=133, Unknown=0, NotChecked=0, Total=240 [2020-10-13 23:43:50,527 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2020-10-13 23:43:50,530 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 79. [2020-10-13 23:43:50,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2020-10-13 23:43:50,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 96 transitions. [2020-10-13 23:43:50,531 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 96 transitions. Word has length 66 [2020-10-13 23:43:50,531 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:43:50,531 INFO L479 AbstractCegarLoop]: Abstraction has 79 states and 96 transitions. [2020-10-13 23:43:50,531 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-13 23:43:50,532 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 96 transitions. [2020-10-13 23:43:50,532 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2020-10-13 23:43:50,532 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:43:50,532 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 13, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:43:50,533 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-10-13 23:43:50,533 INFO L427 AbstractCegarLoop]: === Iteration 23 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:43:50,533 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:43:50,533 INFO L82 PathProgramCache]: Analyzing trace with hash 111033374, now seen corresponding path program 20 times [2020-10-13 23:43:50,533 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:43:50,534 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1445663371] [2020-10-13 23:43:50,534 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:43:50,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:43:50,547 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:43:50,594 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:43:52,560 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:43:55,558 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:43:55,558 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 77 [2020-10-13 23:43:55,558 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 23:43:55,558 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5015 [2020-10-13 23:43:55,559 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:43:55,559 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:43:55,559 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-13 23:43:55,559 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 23:43:55,559 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-13 23:43:55,559 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:43:55,648 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:43:55,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:43:55,650 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:43:55,651 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:43:55,651 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:43:55,651 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:43:55,652 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:43:55,652 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:43:55,652 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:43:55,652 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:43:55,652 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:43:55,652 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:43:55,653 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:43:55,656 INFO L134 CoverageAnalysis]: Checked inductivity of 311 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 247 trivial. 0 not checked. [2020-10-13 23:43:55,656 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1445663371] [2020-10-13 23:43:55,656 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:43:55,657 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-13 23:43:55,657 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1014209266] [2020-10-13 23:43:55,657 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-13 23:43:55,657 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:43:55,658 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-13 23:43:55,658 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2020-10-13 23:43:55,658 INFO L87 Difference]: Start difference. First operand 79 states and 96 transitions. Second operand 12 states. [2020-10-13 23:43:55,767 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:43:55,767 INFO L93 Difference]: Finished difference Result 138 states and 172 transitions. [2020-10-13 23:43:55,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-13 23:43:55,768 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 69 [2020-10-13 23:43:55,768 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:43:55,769 INFO L225 Difference]: With dead ends: 138 [2020-10-13 23:43:55,769 INFO L226 Difference]: Without dead ends: 82 [2020-10-13 23:43:55,770 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2020-10-13 23:43:55,771 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2020-10-13 23:43:55,774 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 81. [2020-10-13 23:43:55,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-10-13 23:43:55,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 98 transitions. [2020-10-13 23:43:55,775 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 98 transitions. Word has length 69 [2020-10-13 23:43:55,775 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:43:55,775 INFO L479 AbstractCegarLoop]: Abstraction has 81 states and 98 transitions. [2020-10-13 23:43:55,775 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-13 23:43:55,775 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 98 transitions. [2020-10-13 23:43:55,776 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2020-10-13 23:43:55,776 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:43:55,776 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 13, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:43:55,777 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-10-13 23:43:55,777 INFO L427 AbstractCegarLoop]: === Iteration 24 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:43:55,777 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:43:55,777 INFO L82 PathProgramCache]: Analyzing trace with hash -1244534084, now seen corresponding path program 21 times [2020-10-13 23:43:55,777 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:43:55,778 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1276156461] [2020-10-13 23:43:55,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:43:55,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:43:55,789 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:43:55,803 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:43:58,459 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:44:00,795 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:44:00,796 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 79 [2020-10-13 23:44:00,796 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 23:44:00,796 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5009 [2020-10-13 23:44:00,796 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:44:00,796 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:44:00,796 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-13 23:44:00,796 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 23:44:00,796 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 60 [2020-10-13 23:44:00,796 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:44:00,946 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:44:00,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:44:00,948 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:44:00,949 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:44:00,949 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:44:00,950 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:44:00,950 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:44:00,950 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:44:00,950 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:44:00,950 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:44:00,950 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:44:00,950 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:44:00,950 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:44:00,954 INFO L134 CoverageAnalysis]: Checked inductivity of 328 backedges. 0 proven. 247 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2020-10-13 23:44:00,955 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1276156461] [2020-10-13 23:44:00,955 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:44:00,955 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-13 23:44:00,955 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [31673693] [2020-10-13 23:44:00,956 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-13 23:44:00,956 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:44:00,956 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-13 23:44:00,957 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=150, Unknown=0, NotChecked=0, Total=272 [2020-10-13 23:44:00,957 INFO L87 Difference]: Start difference. First operand 81 states and 98 transitions. Second operand 17 states. [2020-10-13 23:44:01,151 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:44:01,151 INFO L93 Difference]: Finished difference Result 102 states and 124 transitions. [2020-10-13 23:44:01,151 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-13 23:44:01,152 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 71 [2020-10-13 23:44:01,152 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:44:01,153 INFO L225 Difference]: With dead ends: 102 [2020-10-13 23:44:01,153 INFO L226 Difference]: Without dead ends: 86 [2020-10-13 23:44:01,154 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=122, Invalid=150, Unknown=0, NotChecked=0, Total=272 [2020-10-13 23:44:01,154 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2020-10-13 23:44:01,157 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 84. [2020-10-13 23:44:01,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2020-10-13 23:44:01,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 102 transitions. [2020-10-13 23:44:01,158 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 102 transitions. Word has length 71 [2020-10-13 23:44:01,159 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:44:01,159 INFO L479 AbstractCegarLoop]: Abstraction has 84 states and 102 transitions. [2020-10-13 23:44:01,159 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-13 23:44:01,159 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 102 transitions. [2020-10-13 23:44:01,159 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2020-10-13 23:44:01,160 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:44:01,160 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 14, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:44:01,160 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-10-13 23:44:01,160 INFO L427 AbstractCegarLoop]: === Iteration 25 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:44:01,160 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:44:01,161 INFO L82 PathProgramCache]: Analyzing trace with hash -204836212, now seen corresponding path program 22 times [2020-10-13 23:44:01,161 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:44:01,161 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1428467556] [2020-10-13 23:44:01,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:44:01,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:44:01,172 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:44:01,184 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:44:04,199 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:44:06,179 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:44:06,179 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 82 [2020-10-13 23:44:06,179 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 23:44:06,179 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5010 [2020-10-13 23:44:06,179 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:44:06,180 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:44:06,180 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-13 23:44:06,180 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 23:44:06,180 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-13 23:44:06,180 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:44:06,277 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:44:06,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:44:06,279 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:44:06,280 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:44:06,280 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:44:06,280 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:44:06,280 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:44:06,280 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:44:06,281 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:44:06,281 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:44:06,281 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:44:06,281 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:44:06,281 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:44:06,284 INFO L134 CoverageAnalysis]: Checked inductivity of 368 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 287 trivial. 0 not checked. [2020-10-13 23:44:06,285 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1428467556] [2020-10-13 23:44:06,285 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:44:06,285 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-13 23:44:06,285 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [295335508] [2020-10-13 23:44:06,285 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-13 23:44:06,285 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:44:06,286 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-13 23:44:06,286 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2020-10-13 23:44:06,286 INFO L87 Difference]: Start difference. First operand 84 states and 102 transitions. Second operand 13 states. [2020-10-13 23:44:06,392 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:44:06,393 INFO L93 Difference]: Finished difference Result 146 states and 182 transitions. [2020-10-13 23:44:06,393 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-13 23:44:06,393 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 74 [2020-10-13 23:44:06,393 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:44:06,394 INFO L225 Difference]: With dead ends: 146 [2020-10-13 23:44:06,395 INFO L226 Difference]: Without dead ends: 87 [2020-10-13 23:44:06,395 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2020-10-13 23:44:06,396 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2020-10-13 23:44:06,398 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 86. [2020-10-13 23:44:06,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2020-10-13 23:44:06,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 104 transitions. [2020-10-13 23:44:06,399 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 104 transitions. Word has length 74 [2020-10-13 23:44:06,400 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:44:06,400 INFO L479 AbstractCegarLoop]: Abstraction has 86 states and 104 transitions. [2020-10-13 23:44:06,400 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-13 23:44:06,400 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 104 transitions. [2020-10-13 23:44:06,401 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2020-10-13 23:44:06,401 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:44:06,401 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 14, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:44:06,401 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-10-13 23:44:06,401 INFO L427 AbstractCegarLoop]: === Iteration 26 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:44:06,401 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:44:06,401 INFO L82 PathProgramCache]: Analyzing trace with hash -984533330, now seen corresponding path program 23 times [2020-10-13 23:44:06,402 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:44:06,402 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1812336099] [2020-10-13 23:44:06,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:44:06,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:44:06,423 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:44:06,460 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:44:09,942 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:44:11,424 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:44:11,424 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 84 [2020-10-13 23:44:11,424 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 23:44:11,424 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5009 [2020-10-13 23:44:11,424 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:44:11,424 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:44:11,425 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-13 23:44:11,425 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 23:44:11,425 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 65 [2020-10-13 23:44:11,425 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:44:11,603 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:44:11,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:44:11,605 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:44:11,606 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:44:11,606 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:44:11,606 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:44:11,606 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:44:11,606 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:44:11,607 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:44:11,607 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:44:11,607 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:44:11,607 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:44:11,607 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:44:11,613 INFO L134 CoverageAnalysis]: Checked inductivity of 387 backedges. 0 proven. 287 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2020-10-13 23:44:11,614 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1812336099] [2020-10-13 23:44:11,614 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:44:11,614 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-13 23:44:11,614 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1858808273] [2020-10-13 23:44:11,615 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-13 23:44:11,615 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:44:11,615 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-13 23:44:11,616 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2020-10-13 23:44:11,616 INFO L87 Difference]: Start difference. First operand 86 states and 104 transitions. Second operand 18 states. [2020-10-13 23:44:11,811 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:44:11,811 INFO L93 Difference]: Finished difference Result 107 states and 130 transitions. [2020-10-13 23:44:11,811 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-13 23:44:11,811 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 76 [2020-10-13 23:44:11,812 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:44:11,813 INFO L225 Difference]: With dead ends: 107 [2020-10-13 23:44:11,813 INFO L226 Difference]: Without dead ends: 91 [2020-10-13 23:44:11,814 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2020-10-13 23:44:11,814 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2020-10-13 23:44:11,817 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 89. [2020-10-13 23:44:11,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2020-10-13 23:44:11,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 108 transitions. [2020-10-13 23:44:11,818 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 108 transitions. Word has length 76 [2020-10-13 23:44:11,818 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:44:11,818 INFO L479 AbstractCegarLoop]: Abstraction has 89 states and 108 transitions. [2020-10-13 23:44:11,818 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-13 23:44:11,819 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 108 transitions. [2020-10-13 23:44:11,819 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2020-10-13 23:44:11,819 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:44:11,819 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 15, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:44:11,820 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-10-13 23:44:11,820 INFO L427 AbstractCegarLoop]: === Iteration 27 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:44:11,820 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:44:11,820 INFO L82 PathProgramCache]: Analyzing trace with hash 1651591514, now seen corresponding path program 24 times [2020-10-13 23:44:11,820 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:44:11,821 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1594505602] [2020-10-13 23:44:11,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:44:11,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:44:11,836 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:44:11,858 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:44:15,662 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:44:16,831 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:44:16,832 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 87 [2020-10-13 23:44:16,832 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 23:44:16,832 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-13 23:44:16,832 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:44:16,832 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:44:16,832 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-13 23:44:16,832 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 23:44:16,832 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-13 23:44:16,832 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:44:16,933 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:44:16,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:44:16,935 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:44:16,936 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:44:16,936 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:44:16,936 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:44:16,936 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:44:16,937 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:44:16,937 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:44:16,937 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:44:16,937 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:44:16,937 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:44:16,937 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:44:16,941 INFO L134 CoverageAnalysis]: Checked inductivity of 430 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 330 trivial. 0 not checked. [2020-10-13 23:44:16,941 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1594505602] [2020-10-13 23:44:16,941 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:44:16,941 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-13 23:44:16,942 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1503618377] [2020-10-13 23:44:16,942 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-13 23:44:16,942 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:44:16,942 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-13 23:44:16,943 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2020-10-13 23:44:16,943 INFO L87 Difference]: Start difference. First operand 89 states and 108 transitions. Second operand 14 states. [2020-10-13 23:44:17,046 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:44:17,047 INFO L93 Difference]: Finished difference Result 154 states and 192 transitions. [2020-10-13 23:44:17,047 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-13 23:44:17,047 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 79 [2020-10-13 23:44:17,047 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:44:17,048 INFO L225 Difference]: With dead ends: 154 [2020-10-13 23:44:17,048 INFO L226 Difference]: Without dead ends: 92 [2020-10-13 23:44:17,049 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2020-10-13 23:44:17,050 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2020-10-13 23:44:17,052 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 91. [2020-10-13 23:44:17,052 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2020-10-13 23:44:17,053 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 110 transitions. [2020-10-13 23:44:17,053 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 110 transitions. Word has length 79 [2020-10-13 23:44:17,053 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:44:17,053 INFO L479 AbstractCegarLoop]: Abstraction has 91 states and 110 transitions. [2020-10-13 23:44:17,053 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-13 23:44:17,054 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 110 transitions. [2020-10-13 23:44:17,054 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2020-10-13 23:44:17,054 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:44:17,055 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 15, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:44:17,055 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-10-13 23:44:17,055 INFO L427 AbstractCegarLoop]: === Iteration 28 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:44:17,055 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:44:17,055 INFO L82 PathProgramCache]: Analyzing trace with hash 1149880952, now seen corresponding path program 25 times [2020-10-13 23:44:17,055 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:44:17,055 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2009973853] [2020-10-13 23:44:17,055 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:44:17,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:44:17,072 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:44:17,116 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:44:21,347 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:44:22,078 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:44:22,079 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 89 [2020-10-13 23:44:22,079 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 23:44:22,079 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5012 [2020-10-13 23:44:22,079 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:44:22,079 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:44:22,079 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-13 23:44:22,079 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 23:44:22,079 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 70 [2020-10-13 23:44:22,080 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:44:22,259 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:44:22,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:44:22,262 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:44:22,263 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:44:22,263 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:44:22,263 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:44:22,263 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:44:22,263 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:44:22,263 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:44:22,263 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:44:22,264 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:44:22,264 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:44:22,264 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:44:22,270 INFO L134 CoverageAnalysis]: Checked inductivity of 451 backedges. 0 proven. 330 refuted. 0 times theorem prover too weak. 121 trivial. 0 not checked. [2020-10-13 23:44:22,270 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2009973853] [2020-10-13 23:44:22,270 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:44:22,271 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-10-13 23:44:22,271 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [704783903] [2020-10-13 23:44:22,271 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-13 23:44:22,271 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:44:22,272 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-13 23:44:22,272 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=187, Unknown=0, NotChecked=0, Total=342 [2020-10-13 23:44:22,272 INFO L87 Difference]: Start difference. First operand 91 states and 110 transitions. Second operand 19 states. [2020-10-13 23:44:22,470 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:44:22,470 INFO L93 Difference]: Finished difference Result 112 states and 136 transitions. [2020-10-13 23:44:22,471 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-13 23:44:22,471 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 81 [2020-10-13 23:44:22,471 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:44:22,472 INFO L225 Difference]: With dead ends: 112 [2020-10-13 23:44:22,472 INFO L226 Difference]: Without dead ends: 96 [2020-10-13 23:44:22,473 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=155, Invalid=187, Unknown=0, NotChecked=0, Total=342 [2020-10-13 23:44:22,473 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2020-10-13 23:44:22,476 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 94. [2020-10-13 23:44:22,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2020-10-13 23:44:22,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 114 transitions. [2020-10-13 23:44:22,477 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 114 transitions. Word has length 81 [2020-10-13 23:44:22,478 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:44:22,478 INFO L479 AbstractCegarLoop]: Abstraction has 94 states and 114 transitions. [2020-10-13 23:44:22,478 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-13 23:44:22,478 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 114 transitions. [2020-10-13 23:44:22,479 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2020-10-13 23:44:22,479 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:44:22,479 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 16, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:44:22,479 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2020-10-13 23:44:22,479 INFO L427 AbstractCegarLoop]: === Iteration 29 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:44:22,479 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:44:22,480 INFO L82 PathProgramCache]: Analyzing trace with hash 996649296, now seen corresponding path program 26 times [2020-10-13 23:44:22,480 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:44:22,480 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1072301445] [2020-10-13 23:44:22,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:44:22,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:44:22,501 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:44:22,795 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:44:23,173 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:44:27,510 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:44:27,510 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 92 [2020-10-13 23:44:27,510 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 23:44:27,510 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5016 [2020-10-13 23:44:27,510 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:44:27,510 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:44:27,511 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-13 23:44:27,511 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 23:44:27,511 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 73 [2020-10-13 23:44:27,511 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:44:27,715 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:44:27,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:44:27,717 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:44:27,718 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:44:27,718 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:44:27,718 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:44:27,718 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:44:27,718 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:44:27,719 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:44:27,719 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:44:27,719 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:44:27,719 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:44:27,719 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:44:27,726 INFO L134 CoverageAnalysis]: Checked inductivity of 497 backedges. 0 proven. 376 refuted. 0 times theorem prover too weak. 121 trivial. 0 not checked. [2020-10-13 23:44:27,726 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1072301445] [2020-10-13 23:44:27,726 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:44:27,726 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-10-13 23:44:27,727 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1438659622] [2020-10-13 23:44:27,727 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-13 23:44:27,727 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:44:27,727 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-13 23:44:27,728 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=207, Unknown=0, NotChecked=0, Total=380 [2020-10-13 23:44:27,728 INFO L87 Difference]: Start difference. First operand 94 states and 114 transitions. Second operand 20 states. [2020-10-13 23:44:27,898 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:44:27,899 INFO L93 Difference]: Finished difference Result 115 states and 140 transitions. [2020-10-13 23:44:27,899 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-13 23:44:27,899 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 84 [2020-10-13 23:44:27,900 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:44:27,901 INFO L225 Difference]: With dead ends: 115 [2020-10-13 23:44:27,901 INFO L226 Difference]: Without dead ends: 99 [2020-10-13 23:44:27,902 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=173, Invalid=207, Unknown=0, NotChecked=0, Total=380 [2020-10-13 23:44:27,902 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2020-10-13 23:44:27,905 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 97. [2020-10-13 23:44:27,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2020-10-13 23:44:27,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 118 transitions. [2020-10-13 23:44:27,906 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 118 transitions. Word has length 84 [2020-10-13 23:44:27,906 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:44:27,907 INFO L479 AbstractCegarLoop]: Abstraction has 97 states and 118 transitions. [2020-10-13 23:44:27,907 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-13 23:44:27,907 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 118 transitions. [2020-10-13 23:44:27,907 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2020-10-13 23:44:27,907 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:44:27,907 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 17, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:44:27,908 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2020-10-13 23:44:27,908 INFO L427 AbstractCegarLoop]: === Iteration 30 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:44:27,908 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:44:27,908 INFO L82 PathProgramCache]: Analyzing trace with hash 1622621048, now seen corresponding path program 27 times [2020-10-13 23:44:27,908 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:44:27,909 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [954831232] [2020-10-13 23:44:27,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:44:27,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:44:27,930 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:44:27,962 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:44:32,935 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:44:32,935 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 95 [2020-10-13 23:44:32,935 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 23:44:32,936 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5013 [2020-10-13 23:44:32,936 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:44:32,936 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:44:32,936 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-13 23:44:32,936 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 23:44:32,936 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-10-13 23:44:32,936 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:44:33,055 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:44:33,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:44:33,058 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:44:33,059 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:44:33,060 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:44:33,060 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:44:33,060 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 23:44:33,060 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:44:33,061 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:44:33,061 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:44:33,061 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:44:33,061 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:44:33,061 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:44:33,067 INFO L134 CoverageAnalysis]: Checked inductivity of 546 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 425 trivial. 0 not checked. [2020-10-13 23:44:33,067 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [954831232] [2020-10-13 23:44:33,067 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:44:33,067 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-13 23:44:33,067 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1189921100] [2020-10-13 23:44:33,068 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-13 23:44:33,068 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:44:33,068 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-13 23:44:33,069 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210 [2020-10-13 23:44:33,069 INFO L87 Difference]: Start difference. First operand 97 states and 118 transitions. Second operand 15 states. [2020-10-13 23:44:33,202 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:44:33,203 INFO L93 Difference]: Finished difference Result 168 states and 210 transitions. [2020-10-13 23:44:33,208 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-13 23:44:33,208 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 87 [2020-10-13 23:44:33,208 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:44:33,209 INFO L225 Difference]: With dead ends: 168 [2020-10-13 23:44:33,209 INFO L226 Difference]: Without dead ends: 100 [2020-10-13 23:44:33,210 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210 [2020-10-13 23:44:33,210 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2020-10-13 23:44:33,214 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 99. [2020-10-13 23:44:33,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2020-10-13 23:44:33,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 120 transitions. [2020-10-13 23:44:33,215 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 120 transitions. Word has length 87 [2020-10-13 23:44:33,215 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:44:33,215 INFO L479 AbstractCegarLoop]: Abstraction has 99 states and 120 transitions. [2020-10-13 23:44:33,216 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-13 23:44:33,216 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 120 transitions. [2020-10-13 23:44:33,216 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2020-10-13 23:44:33,216 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:44:33,216 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 17, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:44:33,217 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2020-10-13 23:44:33,217 INFO L427 AbstractCegarLoop]: === Iteration 31 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:44:33,217 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:44:33,217 INFO L82 PathProgramCache]: Analyzing trace with hash -2033992042, now seen corresponding path program 28 times [2020-10-13 23:44:33,217 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:44:33,217 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1224270573] [2020-10-13 23:44:33,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:44:33,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:44:33,240 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:44:33,632 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:44:34,200 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:44:38,250 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:44:38,250 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 97 [2020-10-13 23:44:38,250 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 23:44:38,250 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5018 [2020-10-13 23:44:38,250 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:44:38,250 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:44:38,251 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 19 [2020-10-13 23:44:38,251 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 23:44:38,251 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 78 [2020-10-13 23:44:38,251 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:44:38,476 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:44:38,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:44:38,478 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:44:38,479 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:44:38,479 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:44:38,479 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:44:38,479 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:44:38,479 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:44:38,480 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:44:38,480 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:44:38,480 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:44:38,480 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:44:38,480 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:44:38,487 INFO L134 CoverageAnalysis]: Checked inductivity of 569 backedges. 0 proven. 425 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2020-10-13 23:44:38,487 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1224270573] [2020-10-13 23:44:38,487 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:44:38,487 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-10-13 23:44:38,487 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [329275632] [2020-10-13 23:44:38,488 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-13 23:44:38,488 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:44:38,488 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-13 23:44:38,488 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=192, Invalid=228, Unknown=0, NotChecked=0, Total=420 [2020-10-13 23:44:38,488 INFO L87 Difference]: Start difference. First operand 99 states and 120 transitions. Second operand 21 states. [2020-10-13 23:44:38,700 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:44:38,700 INFO L93 Difference]: Finished difference Result 120 states and 146 transitions. [2020-10-13 23:44:38,701 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-13 23:44:38,701 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 89 [2020-10-13 23:44:38,701 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:44:38,702 INFO L225 Difference]: With dead ends: 120 [2020-10-13 23:44:38,703 INFO L226 Difference]: Without dead ends: 104 [2020-10-13 23:44:38,704 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=192, Invalid=228, Unknown=0, NotChecked=0, Total=420 [2020-10-13 23:44:38,704 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2020-10-13 23:44:38,708 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 102. [2020-10-13 23:44:38,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 102 states. [2020-10-13 23:44:38,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 124 transitions. [2020-10-13 23:44:38,710 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 124 transitions. Word has length 89 [2020-10-13 23:44:38,710 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:44:38,710 INFO L479 AbstractCegarLoop]: Abstraction has 102 states and 124 transitions. [2020-10-13 23:44:38,710 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-13 23:44:38,710 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 124 transitions. [2020-10-13 23:44:38,711 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2020-10-13 23:44:38,711 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:44:38,711 INFO L422 BasicCegarLoop]: trace histogram [18, 18, 18, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:44:38,711 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2020-10-13 23:44:38,711 INFO L427 AbstractCegarLoop]: === Iteration 32 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:44:38,712 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:44:38,712 INFO L82 PathProgramCache]: Analyzing trace with hash 294049906, now seen corresponding path program 29 times [2020-10-13 23:44:38,712 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:44:38,712 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1561080944] [2020-10-13 23:44:38,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:44:38,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:44:38,735 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:44:39,102 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:44:39,689 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:44:43,734 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:44:43,735 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 100 [2020-10-13 23:44:43,735 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 23:44:43,735 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5008 [2020-10-13 23:44:43,735 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:44:43,735 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:44:43,735 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-13 23:44:43,735 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 23:44:43,736 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-13 23:44:43,736 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:44:43,861 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:44:43,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:44:43,864 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:44:43,865 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:44:43,865 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:44:43,865 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:44:43,865 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:44:43,865 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:44:43,865 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:44:43,866 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:44:43,866 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:44:43,866 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:44:43,866 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:44:43,873 INFO L134 CoverageAnalysis]: Checked inductivity of 621 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 477 trivial. 0 not checked. [2020-10-13 23:44:43,873 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1561080944] [2020-10-13 23:44:43,873 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:44:43,874 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-13 23:44:43,874 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1429869577] [2020-10-13 23:44:43,874 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-13 23:44:43,874 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:44:43,875 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-13 23:44:43,875 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=133, Unknown=0, NotChecked=0, Total=240 [2020-10-13 23:44:43,875 INFO L87 Difference]: Start difference. First operand 102 states and 124 transitions. Second operand 16 states. [2020-10-13 23:44:44,001 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:44:44,001 INFO L93 Difference]: Finished difference Result 176 states and 220 transitions. [2020-10-13 23:44:44,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-13 23:44:44,003 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 92 [2020-10-13 23:44:44,003 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:44:44,004 INFO L225 Difference]: With dead ends: 176 [2020-10-13 23:44:44,004 INFO L226 Difference]: Without dead ends: 105 [2020-10-13 23:44:44,005 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=107, Invalid=133, Unknown=0, NotChecked=0, Total=240 [2020-10-13 23:44:44,005 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2020-10-13 23:44:44,008 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 104. [2020-10-13 23:44:44,009 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2020-10-13 23:44:44,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 126 transitions. [2020-10-13 23:44:44,009 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 126 transitions. Word has length 92 [2020-10-13 23:44:44,010 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:44:44,010 INFO L479 AbstractCegarLoop]: Abstraction has 104 states and 126 transitions. [2020-10-13 23:44:44,015 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-13 23:44:44,015 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 126 transitions. [2020-10-13 23:44:44,016 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2020-10-13 23:44:44,016 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:44:44,016 INFO L422 BasicCegarLoop]: trace histogram [18, 18, 18, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:44:44,016 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2020-10-13 23:44:44,016 INFO L427 AbstractCegarLoop]: === Iteration 33 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:44:44,017 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:44:44,020 INFO L82 PathProgramCache]: Analyzing trace with hash -1861904364, now seen corresponding path program 30 times [2020-10-13 23:44:44,020 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:44:44,020 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2048445919] [2020-10-13 23:44:44,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:44:44,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:44:44,051 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:44:44,508 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:44:45,155 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:44:49,047 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:44:49,048 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 102 [2020-10-13 23:44:49,048 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 23:44:49,048 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-10-13 23:44:49,048 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:44:49,048 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:44:49,048 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-10-13 23:44:49,048 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 23:44:49,049 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 83 [2020-10-13 23:44:49,049 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:44:49,299 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:44:49,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:44:49,301 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:44:49,302 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:44:49,302 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:44:49,302 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:44:49,302 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:44:49,302 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:44:49,303 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:44:49,303 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:44:49,303 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:44:49,303 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:44:49,303 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:44:49,310 INFO L134 CoverageAnalysis]: Checked inductivity of 646 backedges. 0 proven. 477 refuted. 0 times theorem prover too weak. 169 trivial. 0 not checked. [2020-10-13 23:44:49,310 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2048445919] [2020-10-13 23:44:49,310 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:44:49,310 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-10-13 23:44:49,310 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1540001502] [2020-10-13 23:44:49,310 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-13 23:44:49,311 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:44:49,312 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-13 23:44:49,312 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=212, Invalid=250, Unknown=0, NotChecked=0, Total=462 [2020-10-13 23:44:49,312 INFO L87 Difference]: Start difference. First operand 104 states and 126 transitions. Second operand 22 states. [2020-10-13 23:44:49,536 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:44:49,536 INFO L93 Difference]: Finished difference Result 125 states and 152 transitions. [2020-10-13 23:44:49,537 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-13 23:44:49,537 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 94 [2020-10-13 23:44:49,537 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:44:49,538 INFO L225 Difference]: With dead ends: 125 [2020-10-13 23:44:49,539 INFO L226 Difference]: Without dead ends: 109 [2020-10-13 23:44:49,539 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=212, Invalid=250, Unknown=0, NotChecked=0, Total=462 [2020-10-13 23:44:49,541 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2020-10-13 23:44:49,545 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 107. [2020-10-13 23:44:49,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 107 states. [2020-10-13 23:44:49,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 130 transitions. [2020-10-13 23:44:49,549 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 130 transitions. Word has length 94 [2020-10-13 23:44:49,550 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:44:49,550 INFO L479 AbstractCegarLoop]: Abstraction has 107 states and 130 transitions. [2020-10-13 23:44:49,550 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-13 23:44:49,550 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 130 transitions. [2020-10-13 23:44:49,550 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2020-10-13 23:44:49,551 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:44:49,551 INFO L422 BasicCegarLoop]: trace histogram [19, 19, 19, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:44:49,554 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2020-10-13 23:44:49,554 INFO L427 AbstractCegarLoop]: === Iteration 34 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:44:49,554 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:44:49,555 INFO L82 PathProgramCache]: Analyzing trace with hash -1232886220, now seen corresponding path program 31 times [2020-10-13 23:44:49,555 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:44:49,555 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1206669741] [2020-10-13 23:44:49,555 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:44:49,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:44:49,579 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:44:50,033 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:44:50,783 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:44:54,572 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:44:54,572 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 105 [2020-10-13 23:44:54,572 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 23:44:54,572 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-13 23:44:54,573 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:44:54,573 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:44:54,573 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 21 [2020-10-13 23:44:54,573 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 23:44:54,573 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 86 [2020-10-13 23:44:54,573 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:44:54,847 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:44:54,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:44:54,849 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:44:54,850 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:44:54,850 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:44:54,850 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:44:54,850 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:44:54,850 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:44:54,851 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:44:54,851 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:44:54,851 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:44:54,851 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:44:54,851 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:44:54,858 INFO L134 CoverageAnalysis]: Checked inductivity of 701 backedges. 0 proven. 532 refuted. 0 times theorem prover too weak. 169 trivial. 0 not checked. [2020-10-13 23:44:54,858 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1206669741] [2020-10-13 23:44:54,858 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:44:54,859 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-10-13 23:44:54,859 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1209240353] [2020-10-13 23:44:54,859 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-13 23:44:54,859 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:44:54,860 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-13 23:44:54,860 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=233, Invalid=273, Unknown=0, NotChecked=0, Total=506 [2020-10-13 23:44:54,860 INFO L87 Difference]: Start difference. First operand 107 states and 130 transitions. Second operand 23 states. [2020-10-13 23:44:55,040 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:44:55,041 INFO L93 Difference]: Finished difference Result 128 states and 156 transitions. [2020-10-13 23:44:55,041 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-13 23:44:55,041 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 97 [2020-10-13 23:44:55,042 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:44:55,043 INFO L225 Difference]: With dead ends: 128 [2020-10-13 23:44:55,043 INFO L226 Difference]: Without dead ends: 112 [2020-10-13 23:44:55,044 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=233, Invalid=273, Unknown=0, NotChecked=0, Total=506 [2020-10-13 23:44:55,045 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2020-10-13 23:44:55,048 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 110. [2020-10-13 23:44:55,049 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 110 states. [2020-10-13 23:44:55,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 134 transitions. [2020-10-13 23:44:55,050 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 134 transitions. Word has length 97 [2020-10-13 23:44:55,050 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:44:55,050 INFO L479 AbstractCegarLoop]: Abstraction has 110 states and 134 transitions. [2020-10-13 23:44:55,050 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-13 23:44:55,050 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 134 transitions. [2020-10-13 23:44:55,051 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2020-10-13 23:44:55,051 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:44:55,051 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 20, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:44:55,051 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2020-10-13 23:44:55,052 INFO L427 AbstractCegarLoop]: === Iteration 35 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:44:55,052 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:44:55,052 INFO L82 PathProgramCache]: Analyzing trace with hash -1095670764, now seen corresponding path program 32 times [2020-10-13 23:44:55,052 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:44:55,052 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1438248065] [2020-10-13 23:44:55,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:44:55,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:44:55,075 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:44:55,536 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:44:56,164 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:45:00,079 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:45:00,080 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 108 [2020-10-13 23:45:00,080 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 23:45:00,080 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5013 [2020-10-13 23:45:00,080 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:45:00,080 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:45:00,080 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-13 23:45:00,081 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 23:45:00,081 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-10-13 23:45:00,081 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:45:00,231 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:45:00,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:45:00,233 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:45:00,234 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:45:00,235 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:45:00,235 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:45:00,235 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:45:00,235 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:45:00,235 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:45:00,236 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:45:00,236 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:45:00,236 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:45:00,236 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:45:00,241 INFO L134 CoverageAnalysis]: Checked inductivity of 759 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 590 trivial. 0 not checked. [2020-10-13 23:45:00,242 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1438248065] [2020-10-13 23:45:00,242 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:45:00,242 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-13 23:45:00,242 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [61762524] [2020-10-13 23:45:00,243 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-13 23:45:00,243 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:45:00,243 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-13 23:45:00,243 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=150, Unknown=0, NotChecked=0, Total=272 [2020-10-13 23:45:00,243 INFO L87 Difference]: Start difference. First operand 110 states and 134 transitions. Second operand 17 states. [2020-10-13 23:45:00,380 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:45:00,381 INFO L93 Difference]: Finished difference Result 190 states and 238 transitions. [2020-10-13 23:45:00,381 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-13 23:45:00,381 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 100 [2020-10-13 23:45:00,381 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:45:00,382 INFO L225 Difference]: With dead ends: 190 [2020-10-13 23:45:00,382 INFO L226 Difference]: Without dead ends: 113 [2020-10-13 23:45:00,382 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=122, Invalid=150, Unknown=0, NotChecked=0, Total=272 [2020-10-13 23:45:00,383 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2020-10-13 23:45:00,386 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 112. [2020-10-13 23:45:00,386 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 112 states. [2020-10-13 23:45:00,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 136 transitions. [2020-10-13 23:45:00,387 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 136 transitions. Word has length 100 [2020-10-13 23:45:00,387 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:45:00,387 INFO L479 AbstractCegarLoop]: Abstraction has 112 states and 136 transitions. [2020-10-13 23:45:00,387 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-13 23:45:00,388 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 136 transitions. [2020-10-13 23:45:00,389 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2020-10-13 23:45:00,389 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:45:00,389 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 20, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:45:00,389 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2020-10-13 23:45:00,389 INFO L427 AbstractCegarLoop]: === Iteration 36 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:45:00,389 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:45:00,390 INFO L82 PathProgramCache]: Analyzing trace with hash -1034985034, now seen corresponding path program 33 times [2020-10-13 23:45:00,390 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:45:00,390 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [213217185] [2020-10-13 23:45:00,390 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:45:00,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:45:00,414 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:45:00,950 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:45:01,759 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:45:05,427 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:45:05,428 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 110 [2020-10-13 23:45:05,428 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 23:45:05,428 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5023 [2020-10-13 23:45:05,428 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:45:05,428 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:45:05,428 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 22 [2020-10-13 23:45:05,428 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 23:45:05,428 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 91 [2020-10-13 23:45:05,429 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:45:05,709 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:45:05,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:45:05,711 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:45:05,712 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:45:05,713 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:45:05,713 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:45:05,713 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:45:05,713 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:45:05,713 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:45:05,714 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:45:05,714 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:45:05,714 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:45:05,714 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:45:05,722 INFO L134 CoverageAnalysis]: Checked inductivity of 786 backedges. 0 proven. 590 refuted. 0 times theorem prover too weak. 196 trivial. 0 not checked. [2020-10-13 23:45:05,723 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [213217185] [2020-10-13 23:45:05,723 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:45:05,723 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2020-10-13 23:45:05,723 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [989168157] [2020-10-13 23:45:05,723 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-13 23:45:05,724 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:45:05,724 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-13 23:45:05,724 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=255, Invalid=297, Unknown=0, NotChecked=0, Total=552 [2020-10-13 23:45:05,724 INFO L87 Difference]: Start difference. First operand 112 states and 136 transitions. Second operand 24 states. [2020-10-13 23:45:05,974 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:45:05,974 INFO L93 Difference]: Finished difference Result 133 states and 162 transitions. [2020-10-13 23:45:05,974 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-13 23:45:05,975 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 102 [2020-10-13 23:45:05,975 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:45:05,976 INFO L225 Difference]: With dead ends: 133 [2020-10-13 23:45:05,976 INFO L226 Difference]: Without dead ends: 117 [2020-10-13 23:45:05,976 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=255, Invalid=297, Unknown=0, NotChecked=0, Total=552 [2020-10-13 23:45:05,977 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2020-10-13 23:45:05,980 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 115. [2020-10-13 23:45:05,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 115 states. [2020-10-13 23:45:05,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 140 transitions. [2020-10-13 23:45:05,981 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 140 transitions. Word has length 102 [2020-10-13 23:45:05,981 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:45:05,982 INFO L479 AbstractCegarLoop]: Abstraction has 115 states and 140 transitions. [2020-10-13 23:45:05,982 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-13 23:45:05,982 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 140 transitions. [2020-10-13 23:45:05,982 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2020-10-13 23:45:05,983 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:45:05,983 INFO L422 BasicCegarLoop]: trace histogram [21, 21, 21, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:45:05,983 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2020-10-13 23:45:05,983 INFO L427 AbstractCegarLoop]: === Iteration 37 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:45:05,983 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:45:05,983 INFO L82 PathProgramCache]: Analyzing trace with hash 1883431250, now seen corresponding path program 34 times [2020-10-13 23:45:05,984 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:45:05,984 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [959918660] [2020-10-13 23:45:05,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:45:05,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:45:06,003 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:45:06,522 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:45:07,675 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:45:10,998 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:45:10,999 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 113 [2020-10-13 23:45:10,999 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 23:45:10,999 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-13 23:45:10,999 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:45:10,999 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:45:10,999 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-13 23:45:10,999 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 23:45:10,999 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-13 23:45:11,000 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:45:11,161 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:45:11,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:45:11,163 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:45:11,163 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:45:11,164 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:45:11,164 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:45:11,164 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:45:11,164 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:45:11,164 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:45:11,164 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:45:11,164 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:45:11,165 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:45:11,165 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:45:11,170 INFO L134 CoverageAnalysis]: Checked inductivity of 847 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 651 trivial. 0 not checked. [2020-10-13 23:45:11,171 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [959918660] [2020-10-13 23:45:11,171 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:45:11,171 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-13 23:45:11,171 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1917249398] [2020-10-13 23:45:11,172 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-13 23:45:11,172 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:45:11,172 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-13 23:45:11,172 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2020-10-13 23:45:11,173 INFO L87 Difference]: Start difference. First operand 115 states and 140 transitions. Second operand 18 states. [2020-10-13 23:45:11,325 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:45:11,326 INFO L93 Difference]: Finished difference Result 198 states and 248 transitions. [2020-10-13 23:45:11,326 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-13 23:45:11,326 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 105 [2020-10-13 23:45:11,327 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:45:11,327 INFO L225 Difference]: With dead ends: 198 [2020-10-13 23:45:11,327 INFO L226 Difference]: Without dead ends: 118 [2020-10-13 23:45:11,328 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2020-10-13 23:45:11,328 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2020-10-13 23:45:11,332 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 117. [2020-10-13 23:45:11,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 117 states. [2020-10-13 23:45:11,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 142 transitions. [2020-10-13 23:45:11,333 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 142 transitions. Word has length 105 [2020-10-13 23:45:11,333 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:45:11,333 INFO L479 AbstractCegarLoop]: Abstraction has 117 states and 142 transitions. [2020-10-13 23:45:11,333 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-13 23:45:11,333 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 142 transitions. [2020-10-13 23:45:11,334 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2020-10-13 23:45:11,334 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:45:11,334 INFO L422 BasicCegarLoop]: trace histogram [21, 21, 21, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:45:11,334 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2020-10-13 23:45:11,335 INFO L427 AbstractCegarLoop]: === Iteration 38 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:45:11,335 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:45:11,335 INFO L82 PathProgramCache]: Analyzing trace with hash -179562256, now seen corresponding path program 35 times [2020-10-13 23:45:11,335 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:45:11,335 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [653891127] [2020-10-13 23:45:11,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:45:11,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:45:11,353 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:45:11,925 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:45:12,910 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:45:16,362 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:45:16,363 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 115 [2020-10-13 23:45:16,363 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 23:45:16,363 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5015 [2020-10-13 23:45:16,363 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:45:16,363 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:45:16,363 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 23 [2020-10-13 23:45:16,363 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 23:45:16,363 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 96 [2020-10-13 23:45:16,363 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:45:16,665 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:45:16,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:45:16,666 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:45:16,667 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:45:16,668 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:45:16,668 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:45:16,668 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:45:16,668 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:45:16,668 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:45:16,668 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:45:16,668 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:45:16,668 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:45:16,669 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:45:16,677 INFO L134 CoverageAnalysis]: Checked inductivity of 876 backedges. 0 proven. 651 refuted. 0 times theorem prover too weak. 225 trivial. 0 not checked. [2020-10-13 23:45:16,677 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [653891127] [2020-10-13 23:45:16,677 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:45:16,678 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2020-10-13 23:45:16,678 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1001538149] [2020-10-13 23:45:16,678 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-13 23:45:16,678 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:45:16,679 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-13 23:45:16,679 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=278, Invalid=322, Unknown=0, NotChecked=0, Total=600 [2020-10-13 23:45:16,679 INFO L87 Difference]: Start difference. First operand 117 states and 142 transitions. Second operand 25 states. [2020-10-13 23:45:16,903 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:45:16,903 INFO L93 Difference]: Finished difference Result 138 states and 168 transitions. [2020-10-13 23:45:16,903 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-13 23:45:16,904 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 107 [2020-10-13 23:45:16,904 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:45:16,905 INFO L225 Difference]: With dead ends: 138 [2020-10-13 23:45:16,905 INFO L226 Difference]: Without dead ends: 122 [2020-10-13 23:45:16,906 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=278, Invalid=322, Unknown=0, NotChecked=0, Total=600 [2020-10-13 23:45:16,906 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2020-10-13 23:45:16,911 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 120. [2020-10-13 23:45:16,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 120 states. [2020-10-13 23:45:16,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 146 transitions. [2020-10-13 23:45:16,912 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 146 transitions. Word has length 107 [2020-10-13 23:45:16,912 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:45:16,912 INFO L479 AbstractCegarLoop]: Abstraction has 120 states and 146 transitions. [2020-10-13 23:45:16,912 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-13 23:45:16,912 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 146 transitions. [2020-10-13 23:45:16,913 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2020-10-13 23:45:16,913 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:45:16,913 INFO L422 BasicCegarLoop]: trace histogram [22, 22, 22, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:45:16,913 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2020-10-13 23:45:16,914 INFO L427 AbstractCegarLoop]: === Iteration 39 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:45:16,914 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:45:16,914 INFO L82 PathProgramCache]: Analyzing trace with hash -552523816, now seen corresponding path program 36 times [2020-10-13 23:45:16,914 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:45:16,914 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [983116487] [2020-10-13 23:45:16,915 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:45:16,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:45:16,940 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:45:17,792 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:45:19,225 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:45:21,939 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:45:21,940 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 118 [2020-10-13 23:45:21,940 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 23:45:21,940 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5009 [2020-10-13 23:45:21,940 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:45:21,940 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:45:21,940 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-13 23:45:21,940 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 23:45:21,940 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-13 23:45:21,940 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:45:22,119 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:45:22,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:45:22,121 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:45:22,121 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:45:22,122 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:45:22,122 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:45:22,122 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:45:22,122 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:45:22,122 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:45:22,123 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:45:22,123 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:45:22,125 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:45:22,125 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-13 23:45:22,138 INFO L134 CoverageAnalysis]: Checked inductivity of 940 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 715 trivial. 0 not checked. [2020-10-13 23:45:22,139 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [983116487] [2020-10-13 23:45:22,139 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:45:22,140 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-10-13 23:45:22,140 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1368028685] [2020-10-13 23:45:22,141 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-13 23:45:22,141 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:45:22,141 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-13 23:45:22,142 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=187, Unknown=0, NotChecked=0, Total=342 [2020-10-13 23:45:22,142 INFO L87 Difference]: Start difference. First operand 120 states and 146 transitions. Second operand 19 states. [2020-10-13 23:45:22,315 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:45:22,316 INFO L93 Difference]: Finished difference Result 206 states and 258 transitions. [2020-10-13 23:45:22,316 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-13 23:45:22,316 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 110 [2020-10-13 23:45:22,317 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:45:22,318 INFO L225 Difference]: With dead ends: 206 [2020-10-13 23:45:22,318 INFO L226 Difference]: Without dead ends: 123 [2020-10-13 23:45:22,319 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=155, Invalid=187, Unknown=0, NotChecked=0, Total=342 [2020-10-13 23:45:22,319 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2020-10-13 23:45:22,324 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 122. [2020-10-13 23:45:22,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 122 states. [2020-10-13 23:45:22,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 148 transitions. [2020-10-13 23:45:22,325 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 148 transitions. Word has length 110 [2020-10-13 23:45:22,325 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:45:22,325 INFO L479 AbstractCegarLoop]: Abstraction has 122 states and 148 transitions. [2020-10-13 23:45:22,326 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-13 23:45:22,326 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 148 transitions. [2020-10-13 23:45:22,326 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2020-10-13 23:45:22,326 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:45:22,327 INFO L422 BasicCegarLoop]: trace histogram [22, 22, 22, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:45:22,327 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2020-10-13 23:45:22,327 INFO L427 AbstractCegarLoop]: === Iteration 40 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:45:22,327 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:45:22,327 INFO L82 PathProgramCache]: Analyzing trace with hash -3144966, now seen corresponding path program 37 times [2020-10-13 23:45:22,327 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:45:22,328 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [219320881] [2020-10-13 23:45:22,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:45:22,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:45:22,361 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:45:23,143 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:45:24,265 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:45:27,385 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:45:27,385 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 120 [2020-10-13 23:45:27,385 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 23:45:27,386 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5034 [2020-10-13 23:45:27,386 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:45:27,386 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:45:27,386 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 24 [2020-10-13 23:45:27,386 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 23:45:27,386 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 101 [2020-10-13 23:45:27,386 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:45:27,729 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:45:27,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:45:27,731 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:45:27,731 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:45:27,732 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:45:27,732 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:45:27,732 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:45:27,732 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:45:27,732 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:45:27,732 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:45:27,732 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:45:27,732 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:45:27,733 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:45:27,745 INFO L134 CoverageAnalysis]: Checked inductivity of 971 backedges. 0 proven. 715 refuted. 0 times theorem prover too weak. 256 trivial. 0 not checked. [2020-10-13 23:45:27,746 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [219320881] [2020-10-13 23:45:27,746 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:45:27,746 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2020-10-13 23:45:27,746 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [443564908] [2020-10-13 23:45:27,747 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-10-13 23:45:27,747 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:45:27,747 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-10-13 23:45:27,747 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=302, Invalid=348, Unknown=0, NotChecked=0, Total=650 [2020-10-13 23:45:27,748 INFO L87 Difference]: Start difference. First operand 122 states and 148 transitions. Second operand 26 states. [2020-10-13 23:45:28,030 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:45:28,030 INFO L93 Difference]: Finished difference Result 143 states and 174 transitions. [2020-10-13 23:45:28,030 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-13 23:45:28,030 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 112 [2020-10-13 23:45:28,031 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:45:28,032 INFO L225 Difference]: With dead ends: 143 [2020-10-13 23:45:28,032 INFO L226 Difference]: Without dead ends: 127 [2020-10-13 23:45:28,033 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=302, Invalid=348, Unknown=0, NotChecked=0, Total=650 [2020-10-13 23:45:28,034 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2020-10-13 23:45:28,038 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 125. [2020-10-13 23:45:28,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 125 states. [2020-10-13 23:45:28,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 152 transitions. [2020-10-13 23:45:28,039 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 152 transitions. Word has length 112 [2020-10-13 23:45:28,040 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:45:28,040 INFO L479 AbstractCegarLoop]: Abstraction has 125 states and 152 transitions. [2020-10-13 23:45:28,040 INFO L480 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-10-13 23:45:28,040 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 152 transitions. [2020-10-13 23:45:28,041 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2020-10-13 23:45:28,041 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:45:28,041 INFO L422 BasicCegarLoop]: trace histogram [23, 23, 23, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:45:28,041 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2020-10-13 23:45:28,041 INFO L427 AbstractCegarLoop]: === Iteration 41 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:45:28,041 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:45:28,042 INFO L82 PathProgramCache]: Analyzing trace with hash -1945007730, now seen corresponding path program 38 times [2020-10-13 23:45:28,042 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:45:28,042 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1161268915] [2020-10-13 23:45:28,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:45:28,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:45:28,070 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:45:29,261 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:45:30,267 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:45:33,096 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:45:33,096 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 123 [2020-10-13 23:45:33,096 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 23:45:33,097 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5037 [2020-10-13 23:45:33,097 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:45:33,097 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:45:33,097 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 25 [2020-10-13 23:45:33,097 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 23:45:33,097 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 104 [2020-10-13 23:45:33,097 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:45:33,477 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:45:33,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:45:33,478 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:45:33,480 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:45:33,480 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:45:33,480 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:45:33,480 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:45:33,480 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:45:33,481 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:45:33,481 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:45:33,481 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:45:33,481 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:45:33,482 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:45:33,498 INFO L134 CoverageAnalysis]: Checked inductivity of 1038 backedges. 0 proven. 782 refuted. 0 times theorem prover too weak. 256 trivial. 0 not checked. [2020-10-13 23:45:33,499 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1161268915] [2020-10-13 23:45:33,499 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:45:33,499 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2020-10-13 23:45:33,499 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [775917682] [2020-10-13 23:45:33,500 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-10-13 23:45:33,500 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:45:33,500 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-10-13 23:45:33,501 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=327, Invalid=375, Unknown=0, NotChecked=0, Total=702 [2020-10-13 23:45:33,501 INFO L87 Difference]: Start difference. First operand 125 states and 152 transitions. Second operand 27 states. [2020-10-13 23:45:33,772 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:45:33,772 INFO L93 Difference]: Finished difference Result 146 states and 178 transitions. [2020-10-13 23:45:33,773 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-13 23:45:33,773 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 115 [2020-10-13 23:45:33,773 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:45:33,774 INFO L225 Difference]: With dead ends: 146 [2020-10-13 23:45:33,774 INFO L226 Difference]: Without dead ends: 130 [2020-10-13 23:45:33,775 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=327, Invalid=375, Unknown=0, NotChecked=0, Total=702 [2020-10-13 23:45:33,776 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2020-10-13 23:45:33,779 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 128. [2020-10-13 23:45:33,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 128 states. [2020-10-13 23:45:33,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 156 transitions. [2020-10-13 23:45:33,780 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 156 transitions. Word has length 115 [2020-10-13 23:45:33,780 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:45:33,780 INFO L479 AbstractCegarLoop]: Abstraction has 128 states and 156 transitions. [2020-10-13 23:45:33,780 INFO L480 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-10-13 23:45:33,780 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 156 transitions. [2020-10-13 23:45:33,781 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2020-10-13 23:45:33,781 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:45:33,781 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 24, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:45:33,781 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2020-10-13 23:45:33,782 INFO L427 AbstractCegarLoop]: === Iteration 42 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:45:33,782 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:45:33,782 INFO L82 PathProgramCache]: Analyzing trace with hash 1230867066, now seen corresponding path program 39 times [2020-10-13 23:45:33,782 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:45:33,782 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [381758967] [2020-10-13 23:45:33,782 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:45:33,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:45:33,802 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:45:33,842 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:45:38,810 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:45:38,810 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 126 [2020-10-13 23:45:38,811 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 23:45:38,811 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5013 [2020-10-13 23:45:38,811 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:45:38,811 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:45:38,811 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-13 23:45:38,811 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 23:45:38,811 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 34 [2020-10-13 23:45:38,811 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:45:39,009 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:45:39,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:45:39,011 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:45:39,012 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:45:39,013 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:45:39,013 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:45:39,013 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:45:39,013 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:45:39,013 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:45:39,014 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:45:39,014 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:45:39,014 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:45:39,014 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:45:39,022 INFO L134 CoverageAnalysis]: Checked inductivity of 1108 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 852 trivial. 0 not checked. [2020-10-13 23:45:39,023 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [381758967] [2020-10-13 23:45:39,023 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:45:39,023 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-10-13 23:45:39,023 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [665116562] [2020-10-13 23:45:39,023 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-13 23:45:39,024 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:45:39,024 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-13 23:45:39,024 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=207, Unknown=0, NotChecked=0, Total=380 [2020-10-13 23:45:39,024 INFO L87 Difference]: Start difference. First operand 128 states and 156 transitions. Second operand 20 states. [2020-10-13 23:45:39,188 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:45:39,189 INFO L93 Difference]: Finished difference Result 220 states and 276 transitions. [2020-10-13 23:45:39,189 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-13 23:45:39,189 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 118 [2020-10-13 23:45:39,190 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:45:39,191 INFO L225 Difference]: With dead ends: 220 [2020-10-13 23:45:39,191 INFO L226 Difference]: Without dead ends: 131 [2020-10-13 23:45:39,192 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=173, Invalid=207, Unknown=0, NotChecked=0, Total=380 [2020-10-13 23:45:39,193 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2020-10-13 23:45:39,196 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 130. [2020-10-13 23:45:39,196 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 130 states. [2020-10-13 23:45:39,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 158 transitions. [2020-10-13 23:45:39,197 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 158 transitions. Word has length 118 [2020-10-13 23:45:39,197 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:45:39,198 INFO L479 AbstractCegarLoop]: Abstraction has 130 states and 158 transitions. [2020-10-13 23:45:39,198 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-13 23:45:39,198 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 158 transitions. [2020-10-13 23:45:39,198 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2020-10-13 23:45:39,198 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:45:39,199 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 24, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:45:39,199 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2020-10-13 23:45:39,199 INFO L427 AbstractCegarLoop]: === Iteration 43 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:45:39,199 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:45:39,199 INFO L82 PathProgramCache]: Analyzing trace with hash 136848284, now seen corresponding path program 40 times [2020-10-13 23:45:39,200 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:45:39,200 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1692339449] [2020-10-13 23:45:39,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:45:39,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:45:39,226 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:45:40,150 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:45:41,709 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:45:44,235 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:45:44,236 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 128 [2020-10-13 23:45:44,236 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 23:45:44,236 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5019 [2020-10-13 23:45:44,236 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:45:44,236 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:45:44,236 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 26 [2020-10-13 23:45:44,236 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 23:45:44,237 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 109 [2020-10-13 23:45:44,237 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:45:44,775 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:45:44,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:45:44,777 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:45:44,778 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:45:44,778 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:45:44,778 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:45:44,778 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:45:44,779 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:45:44,779 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:45:44,779 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:45:44,780 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:45:44,780 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:45:44,780 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:45:44,805 INFO L134 CoverageAnalysis]: Checked inductivity of 1141 backedges. 0 proven. 852 refuted. 0 times theorem prover too weak. 289 trivial. 0 not checked. [2020-10-13 23:45:44,805 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1692339449] [2020-10-13 23:45:44,805 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:45:44,805 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2020-10-13 23:45:44,806 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [614823568] [2020-10-13 23:45:44,806 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-10-13 23:45:44,806 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:45:44,807 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-10-13 23:45:44,807 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=353, Invalid=403, Unknown=0, NotChecked=0, Total=756 [2020-10-13 23:45:44,807 INFO L87 Difference]: Start difference. First operand 130 states and 158 transitions. Second operand 28 states. [2020-10-13 23:45:45,178 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:45:45,178 INFO L93 Difference]: Finished difference Result 151 states and 184 transitions. [2020-10-13 23:45:45,179 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-13 23:45:45,179 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 120 [2020-10-13 23:45:45,179 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:45:45,180 INFO L225 Difference]: With dead ends: 151 [2020-10-13 23:45:45,180 INFO L226 Difference]: Without dead ends: 135 [2020-10-13 23:45:45,181 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=353, Invalid=403, Unknown=0, NotChecked=0, Total=756 [2020-10-13 23:45:45,181 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2020-10-13 23:45:45,185 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 133. [2020-10-13 23:45:45,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 133 states. [2020-10-13 23:45:45,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 162 transitions. [2020-10-13 23:45:45,187 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 162 transitions. Word has length 120 [2020-10-13 23:45:45,187 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:45:45,187 INFO L479 AbstractCegarLoop]: Abstraction has 133 states and 162 transitions. [2020-10-13 23:45:45,187 INFO L480 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-10-13 23:45:45,187 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 162 transitions. [2020-10-13 23:45:45,188 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2020-10-13 23:45:45,188 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:45:45,188 INFO L422 BasicCegarLoop]: trace histogram [25, 25, 25, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:45:45,189 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2020-10-13 23:45:45,189 INFO L427 AbstractCegarLoop]: === Iteration 44 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:45:45,189 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:45:45,189 INFO L82 PathProgramCache]: Analyzing trace with hash -1819341396, now seen corresponding path program 41 times [2020-10-13 23:45:45,189 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:45:45,190 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1981133028] [2020-10-13 23:45:45,190 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:45:45,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:45:45,216 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:45:45,292 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:45:50,227 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:45:50,227 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 131 [2020-10-13 23:45:50,227 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 23:45:50,227 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5020 [2020-10-13 23:45:50,227 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:45:50,227 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:45:50,227 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 19 [2020-10-13 23:45:50,228 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 23:45:50,228 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 36 [2020-10-13 23:45:50,228 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:45:50,438 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:45:50,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:45:50,440 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:45:50,441 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:45:50,441 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:45:50,442 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:45:50,442 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:45:50,442 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:45:50,443 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:45:50,443 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:45:50,443 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:45:50,444 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:45:50,444 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:45:50,460 INFO L134 CoverageAnalysis]: Checked inductivity of 1214 backedges. 0 proven. 289 refuted. 0 times theorem prover too weak. 925 trivial. 0 not checked. [2020-10-13 23:45:50,460 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1981133028] [2020-10-13 23:45:50,460 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:45:50,461 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-10-13 23:45:50,461 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1969329375] [2020-10-13 23:45:50,462 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-13 23:45:50,462 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:45:50,462 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-13 23:45:50,463 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=192, Invalid=228, Unknown=0, NotChecked=0, Total=420 [2020-10-13 23:45:50,463 INFO L87 Difference]: Start difference. First operand 133 states and 162 transitions. Second operand 21 states. [2020-10-13 23:45:50,579 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:45:50,579 INFO L93 Difference]: Finished difference Result 228 states and 286 transitions. [2020-10-13 23:45:50,580 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-13 23:45:50,580 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 123 [2020-10-13 23:45:50,581 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:45:50,582 INFO L225 Difference]: With dead ends: 228 [2020-10-13 23:45:50,582 INFO L226 Difference]: Without dead ends: 136 [2020-10-13 23:45:50,583 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=192, Invalid=228, Unknown=0, NotChecked=0, Total=420 [2020-10-13 23:45:50,583 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2020-10-13 23:45:50,593 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 135. [2020-10-13 23:45:50,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 135 states. [2020-10-13 23:45:50,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 164 transitions. [2020-10-13 23:45:50,596 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 164 transitions. Word has length 123 [2020-10-13 23:45:50,597 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:45:50,597 INFO L479 AbstractCegarLoop]: Abstraction has 135 states and 164 transitions. [2020-10-13 23:45:50,597 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-13 23:45:50,597 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 164 transitions. [2020-10-13 23:45:50,598 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2020-10-13 23:45:50,598 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:45:50,598 INFO L422 BasicCegarLoop]: trace histogram [25, 25, 25, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:45:50,598 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2020-10-13 23:45:50,598 INFO L427 AbstractCegarLoop]: === Iteration 45 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:45:50,599 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:45:50,599 INFO L82 PathProgramCache]: Analyzing trace with hash -763307574, now seen corresponding path program 42 times [2020-10-13 23:45:50,599 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:45:50,599 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1544598513] [2020-10-13 23:45:50,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:45:50,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:45:50,632 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:45:51,911 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:45:53,158 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:45:55,651 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:45:55,651 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 133 [2020-10-13 23:45:55,651 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 23:45:55,651 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5030 [2020-10-13 23:45:55,651 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:45:55,652 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:45:55,652 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 27 [2020-10-13 23:45:55,652 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 23:45:55,652 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 114 [2020-10-13 23:45:55,652 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:45:56,111 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:45:56,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:45:56,114 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:45:56,115 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:45:56,115 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:45:56,115 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:45:56,115 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:45:56,116 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:45:56,116 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:45:56,116 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:45:56,116 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:45:56,116 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:45:56,116 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:45:56,129 INFO L134 CoverageAnalysis]: Checked inductivity of 1249 backedges. 0 proven. 925 refuted. 0 times theorem prover too weak. 324 trivial. 0 not checked. [2020-10-13 23:45:56,129 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1544598513] [2020-10-13 23:45:56,130 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:45:56,130 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29] total 29 [2020-10-13 23:45:56,130 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1896143114] [2020-10-13 23:45:56,131 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-10-13 23:45:56,131 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:45:56,131 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-10-13 23:45:56,131 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=380, Invalid=432, Unknown=0, NotChecked=0, Total=812 [2020-10-13 23:45:56,131 INFO L87 Difference]: Start difference. First operand 135 states and 164 transitions. Second operand 29 states. [2020-10-13 23:45:56,437 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:45:56,437 INFO L93 Difference]: Finished difference Result 156 states and 190 transitions. [2020-10-13 23:45:56,438 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-13 23:45:56,438 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 125 [2020-10-13 23:45:56,438 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:45:56,439 INFO L225 Difference]: With dead ends: 156 [2020-10-13 23:45:56,440 INFO L226 Difference]: Without dead ends: 140 [2020-10-13 23:45:56,440 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=380, Invalid=432, Unknown=0, NotChecked=0, Total=812 [2020-10-13 23:45:56,441 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2020-10-13 23:45:56,445 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 138. [2020-10-13 23:45:56,445 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 138 states. [2020-10-13 23:45:56,446 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 168 transitions. [2020-10-13 23:45:56,446 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 168 transitions. Word has length 125 [2020-10-13 23:45:56,447 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:45:56,447 INFO L479 AbstractCegarLoop]: Abstraction has 138 states and 168 transitions. [2020-10-13 23:45:56,447 INFO L480 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-10-13 23:45:56,447 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 168 transitions. [2020-10-13 23:45:56,447 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2020-10-13 23:45:56,448 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:45:56,448 INFO L422 BasicCegarLoop]: trace histogram [26, 26, 26, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:45:56,448 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2020-10-13 23:45:56,448 INFO L427 AbstractCegarLoop]: === Iteration 46 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:45:56,448 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:45:56,449 INFO L82 PathProgramCache]: Analyzing trace with hash -586710850, now seen corresponding path program 43 times [2020-10-13 23:45:56,449 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:45:56,449 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1323600499] [2020-10-13 23:45:56,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:45:56,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:45:56,472 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:45:57,554 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:45:59,272 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:46:01,485 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:46:01,486 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 136 [2020-10-13 23:46:01,486 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 23:46:01,486 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5022 [2020-10-13 23:46:01,486 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:46:01,486 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:46:01,486 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 28 [2020-10-13 23:46:01,486 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 23:46:01,486 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 117 [2020-10-13 23:46:01,487 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:46:01,939 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:46:01,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:46:01,941 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:46:01,941 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:46:01,942 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:46:01,942 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:46:01,942 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 23:46:01,942 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:46:01,942 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:46:01,942 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:46:01,942 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:46:01,942 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:46:01,943 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:46:01,955 INFO L134 CoverageAnalysis]: Checked inductivity of 1325 backedges. 0 proven. 1001 refuted. 0 times theorem prover too weak. 324 trivial. 0 not checked. [2020-10-13 23:46:01,955 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1323600499] [2020-10-13 23:46:01,956 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:46:01,956 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30] total 30 [2020-10-13 23:46:01,956 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [241191136] [2020-10-13 23:46:01,956 INFO L459 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-10-13 23:46:01,956 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:46:01,957 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-10-13 23:46:01,957 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=408, Invalid=462, Unknown=0, NotChecked=0, Total=870 [2020-10-13 23:46:01,957 INFO L87 Difference]: Start difference. First operand 138 states and 168 transitions. Second operand 30 states. [2020-10-13 23:46:02,275 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:46:02,275 INFO L93 Difference]: Finished difference Result 159 states and 194 transitions. [2020-10-13 23:46:02,275 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-10-13 23:46:02,276 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 128 [2020-10-13 23:46:02,276 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:46:02,277 INFO L225 Difference]: With dead ends: 159 [2020-10-13 23:46:02,277 INFO L226 Difference]: Without dead ends: 143 [2020-10-13 23:46:02,279 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=408, Invalid=462, Unknown=0, NotChecked=0, Total=870 [2020-10-13 23:46:02,279 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2020-10-13 23:46:02,283 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 141. [2020-10-13 23:46:02,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 141 states. [2020-10-13 23:46:02,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 172 transitions. [2020-10-13 23:46:02,284 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 172 transitions. Word has length 128 [2020-10-13 23:46:02,284 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:46:02,284 INFO L479 AbstractCegarLoop]: Abstraction has 141 states and 172 transitions. [2020-10-13 23:46:02,284 INFO L480 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-10-13 23:46:02,285 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 172 transitions. [2020-10-13 23:46:02,285 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2020-10-13 23:46:02,285 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:46:02,285 INFO L422 BasicCegarLoop]: trace histogram [27, 27, 27, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:46:02,286 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2020-10-13 23:46:02,286 INFO L427 AbstractCegarLoop]: === Iteration 47 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:46:02,286 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:46:02,286 INFO L82 PathProgramCache]: Analyzing trace with hash -928643766, now seen corresponding path program 44 times [2020-10-13 23:46:02,286 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:46:02,287 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1698414371] [2020-10-13 23:46:02,287 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:46:02,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:46:02,311 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:46:03,374 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:46:05,304 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:46:07,307 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:46:07,307 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 139 [2020-10-13 23:46:07,307 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 23:46:07,307 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-10-13 23:46:07,307 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:46:07,307 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:46:07,308 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-10-13 23:46:07,308 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 23:46:07,308 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 38 [2020-10-13 23:46:07,308 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:46:07,540 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:46:07,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:46:07,542 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:46:07,543 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:46:07,543 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:46:07,543 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:46:07,543 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:46:07,543 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:46:07,543 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:46:07,543 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:46:07,544 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:46:07,544 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:46:07,544 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:46:07,552 INFO L134 CoverageAnalysis]: Checked inductivity of 1404 backedges. 0 proven. 324 refuted. 0 times theorem prover too weak. 1080 trivial. 0 not checked. [2020-10-13 23:46:07,553 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1698414371] [2020-10-13 23:46:07,553 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:46:07,553 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-10-13 23:46:07,553 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1398044237] [2020-10-13 23:46:07,553 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-13 23:46:07,553 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:46:07,553 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-13 23:46:07,554 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=212, Invalid=250, Unknown=0, NotChecked=0, Total=462 [2020-10-13 23:46:07,554 INFO L87 Difference]: Start difference. First operand 141 states and 172 transitions. Second operand 22 states. [2020-10-13 23:46:07,711 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:46:07,711 INFO L93 Difference]: Finished difference Result 242 states and 304 transitions. [2020-10-13 23:46:07,711 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-13 23:46:07,712 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 131 [2020-10-13 23:46:07,712 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:46:07,713 INFO L225 Difference]: With dead ends: 242 [2020-10-13 23:46:07,713 INFO L226 Difference]: Without dead ends: 144 [2020-10-13 23:46:07,714 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=212, Invalid=250, Unknown=0, NotChecked=0, Total=462 [2020-10-13 23:46:07,715 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2020-10-13 23:46:07,721 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 143. [2020-10-13 23:46:07,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 143 states. [2020-10-13 23:46:07,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 174 transitions. [2020-10-13 23:46:07,722 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 174 transitions. Word has length 131 [2020-10-13 23:46:07,723 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:46:07,723 INFO L479 AbstractCegarLoop]: Abstraction has 143 states and 174 transitions. [2020-10-13 23:46:07,723 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-13 23:46:07,723 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 174 transitions. [2020-10-13 23:46:07,723 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2020-10-13 23:46:07,724 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:46:07,724 INFO L422 BasicCegarLoop]: trace histogram [27, 27, 27, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:46:07,724 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2020-10-13 23:46:07,724 INFO L427 AbstractCegarLoop]: === Iteration 48 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:46:07,724 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:46:07,724 INFO L82 PathProgramCache]: Analyzing trace with hash 1863373672, now seen corresponding path program 45 times [2020-10-13 23:46:07,725 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:46:07,725 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1965825831] [2020-10-13 23:46:07,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:46:07,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:46:07,749 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:46:09,205 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:46:12,534 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:46:12,791 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:46:12,791 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 141 [2020-10-13 23:46:12,791 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 23:46:12,792 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5051 [2020-10-13 23:46:12,792 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:46:12,792 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:46:12,792 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 29 [2020-10-13 23:46:12,792 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 23:46:12,792 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 122 [2020-10-13 23:46:12,792 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:46:13,279 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:46:13,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:46:13,281 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:46:13,282 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:46:13,282 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:46:13,283 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:46:13,283 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:46:13,283 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:46:13,283 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:46:13,283 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:46:13,283 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:46:13,284 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:46:13,284 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:46:13,298 INFO L134 CoverageAnalysis]: Checked inductivity of 1441 backedges. 0 proven. 1080 refuted. 0 times theorem prover too weak. 361 trivial. 0 not checked. [2020-10-13 23:46:13,298 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1965825831] [2020-10-13 23:46:13,298 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:46:13,298 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31] total 31 [2020-10-13 23:46:13,299 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [947443943] [2020-10-13 23:46:13,299 INFO L459 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-10-13 23:46:13,299 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:46:13,299 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-10-13 23:46:13,300 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=437, Invalid=493, Unknown=0, NotChecked=0, Total=930 [2020-10-13 23:46:13,300 INFO L87 Difference]: Start difference. First operand 143 states and 174 transitions. Second operand 31 states. [2020-10-13 23:46:13,594 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:46:13,594 INFO L93 Difference]: Finished difference Result 164 states and 200 transitions. [2020-10-13 23:46:13,594 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-13 23:46:13,594 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 133 [2020-10-13 23:46:13,595 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:46:13,597 INFO L225 Difference]: With dead ends: 164 [2020-10-13 23:46:13,597 INFO L226 Difference]: Without dead ends: 148 [2020-10-13 23:46:13,598 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=437, Invalid=493, Unknown=0, NotChecked=0, Total=930 [2020-10-13 23:46:13,598 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2020-10-13 23:46:13,602 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 146. [2020-10-13 23:46:13,602 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 146 states. [2020-10-13 23:46:13,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 178 transitions. [2020-10-13 23:46:13,603 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 178 transitions. Word has length 133 [2020-10-13 23:46:13,603 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:46:13,603 INFO L479 AbstractCegarLoop]: Abstraction has 146 states and 178 transitions. [2020-10-13 23:46:13,603 INFO L480 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-10-13 23:46:13,604 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 178 transitions. [2020-10-13 23:46:13,604 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2020-10-13 23:46:13,604 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:46:13,604 INFO L422 BasicCegarLoop]: trace histogram [28, 28, 28, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:46:13,605 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2020-10-13 23:46:13,605 INFO L427 AbstractCegarLoop]: === Iteration 49 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:46:13,605 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:46:13,605 INFO L82 PathProgramCache]: Analyzing trace with hash 865122912, now seen corresponding path program 46 times [2020-10-13 23:46:13,605 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:46:13,605 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1702370519] [2020-10-13 23:46:13,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:46:13,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:46:13,629 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:46:13,684 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:46:18,692 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:46:18,693 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 144 [2020-10-13 23:46:18,693 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 23:46:18,693 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5070 [2020-10-13 23:46:18,693 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:46:18,693 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:46:18,693 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 21 [2020-10-13 23:46:18,693 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 23:46:18,694 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 40 [2020-10-13 23:46:18,694 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:46:18,968 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:46:18,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:46:18,970 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:46:18,971 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:46:18,971 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:46:18,972 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:46:18,972 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:46:18,972 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:46:18,972 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:46:18,972 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:46:18,973 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:46:18,973 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:46:18,973 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:46:18,986 INFO L134 CoverageAnalysis]: Checked inductivity of 1523 backedges. 0 proven. 361 refuted. 0 times theorem prover too weak. 1162 trivial. 0 not checked. [2020-10-13 23:46:18,986 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1702370519] [2020-10-13 23:46:18,987 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:46:18,987 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-10-13 23:46:18,987 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [731252682] [2020-10-13 23:46:18,987 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-13 23:46:18,987 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:46:18,988 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-13 23:46:18,988 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=233, Invalid=273, Unknown=0, NotChecked=0, Total=506 [2020-10-13 23:46:18,988 INFO L87 Difference]: Start difference. First operand 146 states and 178 transitions. Second operand 23 states. [2020-10-13 23:46:19,103 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:46:19,103 INFO L93 Difference]: Finished difference Result 250 states and 314 transitions. [2020-10-13 23:46:19,104 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-13 23:46:19,104 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 136 [2020-10-13 23:46:19,104 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:46:19,105 INFO L225 Difference]: With dead ends: 250 [2020-10-13 23:46:19,106 INFO L226 Difference]: Without dead ends: 149 [2020-10-13 23:46:19,107 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=233, Invalid=273, Unknown=0, NotChecked=0, Total=506 [2020-10-13 23:46:19,107 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2020-10-13 23:46:19,111 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 148. [2020-10-13 23:46:19,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 148 states. [2020-10-13 23:46:19,112 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 180 transitions. [2020-10-13 23:46:19,112 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 180 transitions. Word has length 136 [2020-10-13 23:46:19,113 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:46:19,113 INFO L479 AbstractCegarLoop]: Abstraction has 148 states and 180 transitions. [2020-10-13 23:46:19,113 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-13 23:46:19,113 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 180 transitions. [2020-10-13 23:46:19,114 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2020-10-13 23:46:19,114 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:46:19,114 INFO L422 BasicCegarLoop]: trace histogram [28, 28, 28, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:46:19,114 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2020-10-13 23:46:19,114 INFO L427 AbstractCegarLoop]: === Iteration 50 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:46:19,115 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:46:19,115 INFO L82 PathProgramCache]: Analyzing trace with hash -1192751358, now seen corresponding path program 47 times [2020-10-13 23:46:19,115 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:46:19,115 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1166178856] [2020-10-13 23:46:19,115 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:46:19,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:46:19,143 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:46:20,501 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:46:22,714 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:46:24,149 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:46:24,149 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 146 [2020-10-13 23:46:24,149 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 23:46:24,149 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5016 [2020-10-13 23:46:24,149 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:46:24,150 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:46:24,150 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 30 [2020-10-13 23:46:24,150 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 23:46:24,150 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 127 [2020-10-13 23:46:24,150 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:46:24,707 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:46:24,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:46:24,709 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:46:24,710 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:46:24,710 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:46:24,710 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:46:24,711 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:46:24,711 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:46:24,711 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:46:24,711 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:46:24,711 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:46:24,711 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:46:24,711 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:46:24,726 INFO L134 CoverageAnalysis]: Checked inductivity of 1562 backedges. 0 proven. 1162 refuted. 0 times theorem prover too weak. 400 trivial. 0 not checked. [2020-10-13 23:46:24,726 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1166178856] [2020-10-13 23:46:24,726 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:46:24,727 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32] total 32 [2020-10-13 23:46:24,727 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [805697178] [2020-10-13 23:46:24,727 INFO L459 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-10-13 23:46:24,727 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:46:24,727 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-10-13 23:46:24,728 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=467, Invalid=525, Unknown=0, NotChecked=0, Total=992 [2020-10-13 23:46:24,728 INFO L87 Difference]: Start difference. First operand 148 states and 180 transitions. Second operand 32 states. [2020-10-13 23:46:25,031 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:46:25,031 INFO L93 Difference]: Finished difference Result 169 states and 206 transitions. [2020-10-13 23:46:25,031 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-10-13 23:46:25,032 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 138 [2020-10-13 23:46:25,032 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:46:25,033 INFO L225 Difference]: With dead ends: 169 [2020-10-13 23:46:25,033 INFO L226 Difference]: Without dead ends: 153 [2020-10-13 23:46:25,034 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=467, Invalid=525, Unknown=0, NotChecked=0, Total=992 [2020-10-13 23:46:25,034 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2020-10-13 23:46:25,038 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 151. [2020-10-13 23:46:25,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 151 states. [2020-10-13 23:46:25,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 184 transitions. [2020-10-13 23:46:25,039 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 184 transitions. Word has length 138 [2020-10-13 23:46:25,039 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:46:25,040 INFO L479 AbstractCegarLoop]: Abstraction has 151 states and 184 transitions. [2020-10-13 23:46:25,040 INFO L480 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-10-13 23:46:25,040 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 184 transitions. [2020-10-13 23:46:25,040 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2020-10-13 23:46:25,041 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:46:25,041 INFO L422 BasicCegarLoop]: trace histogram [29, 29, 29, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:46:25,041 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2020-10-13 23:46:25,041 INFO L427 AbstractCegarLoop]: === Iteration 51 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:46:25,041 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:46:25,041 INFO L82 PathProgramCache]: Analyzing trace with hash 561094790, now seen corresponding path program 48 times [2020-10-13 23:46:25,042 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:46:25,042 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [248497958] [2020-10-13 23:46:25,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:46:25,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:46:25,072 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:46:26,536 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:46:30,160 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:46:30,160 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 149 [2020-10-13 23:46:30,161 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 23:46:30,161 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5100 [2020-10-13 23:46:30,161 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:46:30,161 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:46:30,161 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 22 [2020-10-13 23:46:30,161 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 23:46:30,161 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 42 [2020-10-13 23:46:30,161 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:46:30,451 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:46:30,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:46:30,453 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:46:30,454 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:46:30,455 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:46:30,455 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:46:30,455 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:46:30,455 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:46:30,455 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:46:30,456 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:46:30,456 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:46:30,456 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:46:30,456 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:46:30,469 INFO L134 CoverageAnalysis]: Checked inductivity of 1647 backedges. 0 proven. 400 refuted. 0 times theorem prover too weak. 1247 trivial. 0 not checked. [2020-10-13 23:46:30,470 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [248497958] [2020-10-13 23:46:30,470 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:46:30,470 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2020-10-13 23:46:30,470 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2144713773] [2020-10-13 23:46:30,470 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-13 23:46:30,470 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:46:30,471 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-13 23:46:30,471 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=255, Invalid=297, Unknown=0, NotChecked=0, Total=552 [2020-10-13 23:46:30,471 INFO L87 Difference]: Start difference. First operand 151 states and 184 transitions. Second operand 24 states. [2020-10-13 23:46:30,647 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:46:30,647 INFO L93 Difference]: Finished difference Result 258 states and 324 transitions. [2020-10-13 23:46:30,648 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-13 23:46:30,648 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 141 [2020-10-13 23:46:30,648 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:46:30,650 INFO L225 Difference]: With dead ends: 258 [2020-10-13 23:46:30,650 INFO L226 Difference]: Without dead ends: 154 [2020-10-13 23:46:30,651 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=255, Invalid=297, Unknown=0, NotChecked=0, Total=552 [2020-10-13 23:46:30,651 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2020-10-13 23:46:30,655 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 153. [2020-10-13 23:46:30,656 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 153 states. [2020-10-13 23:46:30,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 186 transitions. [2020-10-13 23:46:30,657 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 186 transitions. Word has length 141 [2020-10-13 23:46:30,657 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:46:30,657 INFO L479 AbstractCegarLoop]: Abstraction has 153 states and 186 transitions. [2020-10-13 23:46:30,657 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-13 23:46:30,658 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 186 transitions. [2020-10-13 23:46:30,659 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2020-10-13 23:46:30,659 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:46:30,659 INFO L422 BasicCegarLoop]: trace histogram [29, 29, 29, 21, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:46:30,659 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2020-10-13 23:46:30,659 INFO L427 AbstractCegarLoop]: === Iteration 52 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:46:30,660 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:46:30,660 INFO L82 PathProgramCache]: Analyzing trace with hash -973086428, now seen corresponding path program 49 times [2020-10-13 23:46:30,662 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:46:30,662 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1395877028] [2020-10-13 23:46:30,662 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:46:30,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:46:30,698 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:46:33,601 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:46:35,718 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:46:35,718 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 151 [2020-10-13 23:46:35,718 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 23:46:35,718 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5030 [2020-10-13 23:46:35,718 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:46:35,718 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:46:35,718 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 31 [2020-10-13 23:46:35,719 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 23:46:35,719 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 132 [2020-10-13 23:46:35,719 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:46:36,271 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:46:36,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:46:36,273 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:46:36,274 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:46:36,274 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:46:36,274 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:46:36,274 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:46:36,275 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:46:36,275 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:46:36,275 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:46:36,275 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:46:36,275 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:46:36,275 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:46:36,291 INFO L134 CoverageAnalysis]: Checked inductivity of 1688 backedges. 0 proven. 1247 refuted. 0 times theorem prover too weak. 441 trivial. 0 not checked. [2020-10-13 23:46:36,291 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1395877028] [2020-10-13 23:46:36,291 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:46:36,292 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33] total 33 [2020-10-13 23:46:36,292 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1926840727] [2020-10-13 23:46:36,292 INFO L459 AbstractCegarLoop]: Interpolant automaton has 33 states [2020-10-13 23:46:36,292 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:46:36,293 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2020-10-13 23:46:36,293 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=498, Invalid=558, Unknown=0, NotChecked=0, Total=1056 [2020-10-13 23:46:36,293 INFO L87 Difference]: Start difference. First operand 153 states and 186 transitions. Second operand 33 states. [2020-10-13 23:46:36,657 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:46:36,658 INFO L93 Difference]: Finished difference Result 174 states and 212 transitions. [2020-10-13 23:46:36,658 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-10-13 23:46:36,658 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 143 [2020-10-13 23:46:36,659 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:46:36,660 INFO L225 Difference]: With dead ends: 174 [2020-10-13 23:46:36,660 INFO L226 Difference]: Without dead ends: 158 [2020-10-13 23:46:36,661 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=498, Invalid=558, Unknown=0, NotChecked=0, Total=1056 [2020-10-13 23:46:36,662 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2020-10-13 23:46:36,665 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 156. [2020-10-13 23:46:36,666 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 156 states. [2020-10-13 23:46:36,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 190 transitions. [2020-10-13 23:46:36,666 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 190 transitions. Word has length 143 [2020-10-13 23:46:36,667 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:46:36,667 INFO L479 AbstractCegarLoop]: Abstraction has 156 states and 190 transitions. [2020-10-13 23:46:36,667 INFO L480 AbstractCegarLoop]: Interpolant automaton has 33 states. [2020-10-13 23:46:36,667 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 190 transitions. [2020-10-13 23:46:36,668 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2020-10-13 23:46:36,668 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:46:36,668 INFO L422 BasicCegarLoop]: trace histogram [30, 30, 30, 21, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:46:36,669 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2020-10-13 23:46:36,669 INFO L427 AbstractCegarLoop]: === Iteration 53 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:46:36,669 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:46:36,669 INFO L82 PathProgramCache]: Analyzing trace with hash -931134684, now seen corresponding path program 50 times [2020-10-13 23:46:36,669 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:46:36,669 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1891815846] [2020-10-13 23:46:36,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:46:36,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:46:36,699 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:46:38,594 FATAL L256 erpolLogProxyWrapper]: Now shrinking...