/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --rcfgbuilder.size.of.a.code.block SequenceOfStatements --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=SMALLESTAMONGWIDE --traceabstraction.additional.smt.options tolerance=0.2 --traceabstraction.additional.smt.options log-additional-information=true --traceabstraction.additional.smt.options unknown-allowed=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/array-examples/standard_init6_ground-2.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-adbd35c [2020-10-14 17:59:37,798 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-14 17:59:37,801 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-14 17:59:37,824 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-14 17:59:37,824 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-14 17:59:37,825 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-14 17:59:37,826 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-14 17:59:37,828 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-14 17:59:37,830 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-14 17:59:37,831 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-14 17:59:37,832 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-14 17:59:37,833 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-14 17:59:37,833 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-14 17:59:37,834 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-14 17:59:37,835 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-14 17:59:37,836 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-14 17:59:37,837 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-14 17:59:37,838 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-14 17:59:37,839 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-14 17:59:37,841 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-14 17:59:37,842 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-14 17:59:37,843 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-14 17:59:37,844 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-14 17:59:37,845 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-14 17:59:37,852 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-14 17:59:37,853 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-14 17:59:37,853 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-14 17:59:37,854 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-14 17:59:37,854 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-14 17:59:37,855 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-14 17:59:37,855 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-14 17:59:37,858 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-14 17:59:37,859 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-14 17:59:37,860 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-14 17:59:37,862 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-14 17:59:37,862 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-14 17:59:37,862 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-14 17:59:37,863 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-14 17:59:37,863 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-14 17:59:37,872 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-14 17:59:37,873 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-14 17:59:37,874 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-14 17:59:37,917 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-14 17:59:37,918 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-14 17:59:37,919 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-14 17:59:37,920 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-14 17:59:37,920 INFO L138 SettingsManager]: * Use SBE=true [2020-10-14 17:59:37,920 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-14 17:59:37,920 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-14 17:59:37,920 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-14 17:59:37,921 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-14 17:59:37,921 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-14 17:59:37,922 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-14 17:59:37,923 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-14 17:59:37,923 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-14 17:59:37,923 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-14 17:59:37,923 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-14 17:59:37,924 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-14 17:59:37,924 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-14 17:59:37,924 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-14 17:59:37,924 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-14 17:59:37,924 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-14 17:59:37,925 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-14 17:59:37,925 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-14 17:59:37,925 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-14 17:59:37,925 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-14 17:59:37,925 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-14 17:59:37,926 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-14 17:59:37,926 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-14 17:59:37,926 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-14 17:59:37,926 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-14 17:59:37,926 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.2;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.2;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.2;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.2;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.2;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.2;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.2;log-additional-information=true;unknown-allowed=true; [2020-10-14 17:59:38,258 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-14 17:59:38,270 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-14 17:59:38,274 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-14 17:59:38,275 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-14 17:59:38,276 INFO L275 PluginConnector]: CDTParser initialized [2020-10-14 17:59:38,276 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-examples/standard_init6_ground-2.i [2020-10-14 17:59:38,340 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/24b7aa732/9713f331f35b4c30b3d68deed22fa93b/FLAG8491d5fe1 [2020-10-14 17:59:38,790 INFO L306 CDTParser]: Found 1 translation units. [2020-10-14 17:59:38,791 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/array-examples/standard_init6_ground-2.i [2020-10-14 17:59:38,797 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/24b7aa732/9713f331f35b4c30b3d68deed22fa93b/FLAG8491d5fe1 [2020-10-14 17:59:39,197 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/24b7aa732/9713f331f35b4c30b3d68deed22fa93b [2020-10-14 17:59:39,210 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-14 17:59:39,212 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-14 17:59:39,215 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-14 17:59:39,215 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-14 17:59:39,218 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-14 17:59:39,219 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 05:59:39" (1/1) ... [2020-10-14 17:59:39,223 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2362c63d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 05:59:39, skipping insertion in model container [2020-10-14 17:59:39,223 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 05:59:39" (1/1) ... [2020-10-14 17:59:39,231 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-14 17:59:39,252 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-14 17:59:39,436 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-14 17:59:39,441 INFO L203 MainTranslator]: Completed pre-run [2020-10-14 17:59:39,462 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-14 17:59:39,480 INFO L208 MainTranslator]: Completed translation [2020-10-14 17:59:39,480 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 05:59:39 WrapperNode [2020-10-14 17:59:39,481 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-14 17:59:39,481 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-14 17:59:39,481 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-14 17:59:39,482 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-14 17:59:39,575 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 05:59:39" (1/1) ... [2020-10-14 17:59:39,576 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 05:59:39" (1/1) ... [2020-10-14 17:59:39,584 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 05:59:39" (1/1) ... [2020-10-14 17:59:39,584 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 05:59:39" (1/1) ... [2020-10-14 17:59:39,591 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 05:59:39" (1/1) ... [2020-10-14 17:59:39,598 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 05:59:39" (1/1) ... [2020-10-14 17:59:39,599 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 05:59:39" (1/1) ... [2020-10-14 17:59:39,601 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-14 17:59:39,601 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-14 17:59:39,601 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-14 17:59:39,602 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-14 17:59:39,602 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 05:59:39" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-14 17:59:39,655 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-14 17:59:39,655 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-14 17:59:39,656 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-14 17:59:39,656 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-14 17:59:39,656 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-10-14 17:59:39,656 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-14 17:59:39,656 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-14 17:59:39,656 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-14 17:59:39,657 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-14 17:59:39,657 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-14 17:59:39,657 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-14 17:59:39,657 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-14 17:59:39,657 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-14 17:59:39,892 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-14 17:59:39,893 INFO L295 CfgBuilder]: Removed 7 assume(true) statements. [2020-10-14 17:59:39,897 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 05:59:39 BoogieIcfgContainer [2020-10-14 17:59:39,897 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-14 17:59:39,898 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-14 17:59:39,898 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-14 17:59:39,901 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-14 17:59:39,902 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.10 05:59:39" (1/3) ... [2020-10-14 17:59:39,902 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2925f5d6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 05:59:39, skipping insertion in model container [2020-10-14 17:59:39,903 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 05:59:39" (2/3) ... [2020-10-14 17:59:39,903 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2925f5d6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 05:59:39, skipping insertion in model container [2020-10-14 17:59:39,903 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 05:59:39" (3/3) ... [2020-10-14 17:59:39,905 INFO L109 eAbstractionObserver]: Analyzing ICFG standard_init6_ground-2.i [2020-10-14 17:59:39,915 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-14 17:59:39,922 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-14 17:59:39,948 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-14 17:59:39,989 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-10-14 17:59:39,990 INFO L376 AbstractCegarLoop]: Hoare is true [2020-10-14 17:59:39,990 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-14 17:59:39,990 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-14 17:59:39,990 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-14 17:59:39,991 INFO L380 AbstractCegarLoop]: Difference is false [2020-10-14 17:59:39,991 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-14 17:59:39,991 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-14 17:59:40,016 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states. [2020-10-14 17:59:40,028 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-14 17:59:40,028 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 17:59:40,029 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 17:59:40,030 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 17:59:40,036 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 17:59:40,036 INFO L82 PathProgramCache]: Analyzing trace with hash -1058720290, now seen corresponding path program 1 times [2020-10-14 17:59:40,045 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 17:59:40,046 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2077624200] [2020-10-14 17:59:40,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 17:59:40,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:59:40,176 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:59:40,210 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:59:40,240 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:59:40,258 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:59:40,278 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:59:40,316 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:59:40,989 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:59:40,990 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 31 [2020-10-14 17:59:40,990 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-14 17:59:40,991 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 828 [2020-10-14 17:59:40,995 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:59:40,996 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:59:40,997 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 17:59:40,997 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-14 17:59:40,998 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-14 17:59:40,998 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 6 [2020-10-14 17:59:41,098 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 17:59:41,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:59:41,109 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:59:41,114 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:59:41,115 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 17:59:41,115 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 17:59:41,116 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-14 17:59:41,118 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:59:41,118 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:59:41,119 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 17:59:41,120 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 17:59:41,121 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 17:59:41,121 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-14 17:59:41,140 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 17:59:41,143 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2077624200] [2020-10-14 17:59:41,146 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 17:59:41,146 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-14 17:59:41,148 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [591271346] [2020-10-14 17:59:41,155 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-14 17:59:41,156 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 17:59:41,171 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-14 17:59:41,172 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-14 17:59:41,175 INFO L87 Difference]: Start difference. First operand 33 states. Second operand 4 states. [2020-10-14 17:59:41,378 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 17:59:41,379 INFO L93 Difference]: Finished difference Result 65 states and 104 transitions. [2020-10-14 17:59:41,382 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-14 17:59:41,384 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 23 [2020-10-14 17:59:41,385 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 17:59:41,396 INFO L225 Difference]: With dead ends: 65 [2020-10-14 17:59:41,396 INFO L226 Difference]: Without dead ends: 34 [2020-10-14 17:59:41,401 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 [2020-10-14 17:59:41,434 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2020-10-14 17:59:41,467 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2020-10-14 17:59:41,469 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2020-10-14 17:59:41,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 40 transitions. [2020-10-14 17:59:41,475 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 40 transitions. Word has length 23 [2020-10-14 17:59:41,475 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 17:59:41,475 INFO L479 AbstractCegarLoop]: Abstraction has 34 states and 40 transitions. [2020-10-14 17:59:41,476 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-14 17:59:41,476 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 40 transitions. [2020-10-14 17:59:41,478 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-10-14 17:59:41,478 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 17:59:41,478 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 17:59:41,479 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-14 17:59:41,479 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 17:59:41,480 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 17:59:41,480 INFO L82 PathProgramCache]: Analyzing trace with hash -2002754829, now seen corresponding path program 1 times [2020-10-14 17:59:41,480 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 17:59:41,481 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1457058309] [2020-10-14 17:59:41,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 17:59:41,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:59:41,508 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:59:41,528 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:59:41,547 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:59:41,560 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:59:41,575 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:59:41,675 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:59:46,504 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:59:46,504 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 37 [2020-10-14 17:59:46,505 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-14 17:59:46,505 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-14 17:59:46,505 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:59:46,506 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:59:46,506 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-14 17:59:46,506 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-14 17:59:46,506 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 3 [2020-10-14 17:59:46,506 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 17:59:46,548 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 17:59:46,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:59:46,551 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:59:46,552 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:59:46,553 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 17:59:46,553 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 17:59:46,553 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-14 17:59:46,553 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:59:46,554 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:59:46,554 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 17:59:46,554 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 17:59:46,554 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 17:59:46,554 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 17:59:46,558 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-10-14 17:59:46,558 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1457058309] [2020-10-14 17:59:46,559 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 17:59:46,559 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-14 17:59:46,559 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1810048505] [2020-10-14 17:59:46,561 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-14 17:59:46,561 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 17:59:46,562 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-14 17:59:46,562 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-14 17:59:46,562 INFO L87 Difference]: Start difference. First operand 34 states and 40 transitions. Second operand 5 states. [2020-10-14 17:59:46,688 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 17:59:46,688 INFO L93 Difference]: Finished difference Result 66 states and 83 transitions. [2020-10-14 17:59:46,689 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-14 17:59:46,689 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 29 [2020-10-14 17:59:46,690 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 17:59:46,691 INFO L225 Difference]: With dead ends: 66 [2020-10-14 17:59:46,691 INFO L226 Difference]: Without dead ends: 40 [2020-10-14 17:59:46,692 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 [2020-10-14 17:59:46,693 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2020-10-14 17:59:46,700 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2020-10-14 17:59:46,700 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-10-14 17:59:46,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 46 transitions. [2020-10-14 17:59:46,702 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 46 transitions. Word has length 29 [2020-10-14 17:59:46,702 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 17:59:46,702 INFO L479 AbstractCegarLoop]: Abstraction has 40 states and 46 transitions. [2020-10-14 17:59:46,702 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-14 17:59:46,702 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 46 transitions. [2020-10-14 17:59:46,703 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-10-14 17:59:46,704 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 17:59:46,704 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 17:59:46,704 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-14 17:59:46,704 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 17:59:46,705 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 17:59:46,705 INFO L82 PathProgramCache]: Analyzing trace with hash -1979990410, now seen corresponding path program 2 times [2020-10-14 17:59:46,705 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 17:59:46,706 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [945314315] [2020-10-14 17:59:46,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 17:59:46,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:59:46,718 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:59:46,730 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:59:46,745 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:59:46,759 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:59:46,804 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:59:47,320 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:59:51,721 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:59:51,721 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 43 [2020-10-14 17:59:51,721 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-14 17:59:51,722 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-10-14 17:59:51,722 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:59:51,722 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:59:51,722 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-14 17:59:51,723 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 27 [2020-10-14 17:59:51,723 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 4 [2020-10-14 17:59:51,723 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 17:59:51,769 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 17:59:51,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:59:51,771 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:59:51,773 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:59:51,774 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 17:59:51,774 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 17:59:51,774 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-14 17:59:51,775 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:59:51,775 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:59:51,777 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 17:59:51,777 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 17:59:51,777 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 17:59:51,778 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-14 17:59:51,780 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2020-10-14 17:59:51,781 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [945314315] [2020-10-14 17:59:51,782 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 17:59:51,782 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-14 17:59:51,783 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [455490182] [2020-10-14 17:59:51,783 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-14 17:59:51,784 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 17:59:51,784 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-14 17:59:51,785 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-14 17:59:51,785 INFO L87 Difference]: Start difference. First operand 40 states and 46 transitions. Second operand 6 states. [2020-10-14 17:59:51,963 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 17:59:51,963 INFO L93 Difference]: Finished difference Result 77 states and 94 transitions. [2020-10-14 17:59:51,964 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-14 17:59:51,964 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 35 [2020-10-14 17:59:51,964 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 17:59:51,965 INFO L225 Difference]: With dead ends: 77 [2020-10-14 17:59:51,965 INFO L226 Difference]: Without dead ends: 46 [2020-10-14 17:59:51,968 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 [2020-10-14 17:59:51,969 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2020-10-14 17:59:51,980 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 46. [2020-10-14 17:59:51,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-10-14 17:59:51,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 52 transitions. [2020-10-14 17:59:51,983 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 52 transitions. Word has length 35 [2020-10-14 17:59:51,983 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 17:59:51,984 INFO L479 AbstractCegarLoop]: Abstraction has 46 states and 52 transitions. [2020-10-14 17:59:51,984 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-14 17:59:51,984 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 52 transitions. [2020-10-14 17:59:51,987 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-10-14 17:59:51,987 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 17:59:51,987 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 17:59:51,988 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-14 17:59:51,988 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 17:59:51,988 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 17:59:51,989 INFO L82 PathProgramCache]: Analyzing trace with hash 682352339, now seen corresponding path program 3 times [2020-10-14 17:59:51,989 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 17:59:51,990 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2089109659] [2020-10-14 17:59:51,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 17:59:52,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:59:52,009 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:59:52,029 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:59:52,044 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:59:52,058 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:59:52,102 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:59:52,949 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:59:57,010 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:59:57,011 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 49 [2020-10-14 17:59:57,011 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-14 17:59:57,012 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-14 17:59:57,014 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:59:57,014 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:59:57,014 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-14 17:59:57,015 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 31 [2020-10-14 17:59:57,015 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 5 [2020-10-14 17:59:57,015 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 17:59:57,069 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 17:59:57,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:59:57,071 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:59:57,072 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:59:57,073 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 17:59:57,073 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 17:59:57,078 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 17:59:57,079 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:59:57,079 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:59:57,079 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 17:59:57,079 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 17:59:57,080 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 17:59:57,080 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 17:59:57,087 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2020-10-14 17:59:57,091 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2089109659] [2020-10-14 17:59:57,091 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 17:59:57,092 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-14 17:59:57,092 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2032201362] [2020-10-14 17:59:57,092 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-14 17:59:57,093 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 17:59:57,093 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-14 17:59:57,094 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-10-14 17:59:57,094 INFO L87 Difference]: Start difference. First operand 46 states and 52 transitions. Second operand 7 states. [2020-10-14 17:59:57,259 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 17:59:57,260 INFO L93 Difference]: Finished difference Result 88 states and 105 transitions. [2020-10-14 17:59:57,260 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-14 17:59:57,260 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 41 [2020-10-14 17:59:57,260 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 17:59:57,261 INFO L225 Difference]: With dead ends: 88 [2020-10-14 17:59:57,261 INFO L226 Difference]: Without dead ends: 52 [2020-10-14 17:59:57,262 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 [2020-10-14 17:59:57,263 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2020-10-14 17:59:57,274 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 52. [2020-10-14 17:59:57,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-10-14 17:59:57,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 58 transitions. [2020-10-14 17:59:57,278 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 58 transitions. Word has length 41 [2020-10-14 17:59:57,279 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 17:59:57,280 INFO L479 AbstractCegarLoop]: Abstraction has 52 states and 58 transitions. [2020-10-14 17:59:57,280 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-14 17:59:57,280 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 58 transitions. [2020-10-14 17:59:57,282 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-10-14 17:59:57,282 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 17:59:57,282 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 17:59:57,282 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-14 17:59:57,283 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 17:59:57,283 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 17:59:57,283 INFO L82 PathProgramCache]: Analyzing trace with hash -411261930, now seen corresponding path program 4 times [2020-10-14 17:59:57,283 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 17:59:57,284 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [120407163] [2020-10-14 17:59:57,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 17:59:57,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:59:57,303 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:59:57,322 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:59:57,341 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:59:57,360 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:59:57,411 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:00:02,299 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:00:02,300 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 55 [2020-10-14 18:00:02,300 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-14 18:00:02,300 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-14 18:00:02,301 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:00:02,301 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:00:02,301 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-14 18:00:02,301 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 29 [2020-10-14 18:00:02,301 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-14 18:00:02,302 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 18:00:02,358 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 18:00:02,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:00:02,360 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:00:02,362 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:00:02,362 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 18:00:02,362 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:00:02,363 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 18:00:02,363 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:00:02,363 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:00:02,363 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:00:02,364 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:00:02,364 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:00:02,364 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 18:00:02,368 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2020-10-14 18:00:02,368 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [120407163] [2020-10-14 18:00:02,369 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 18:00:02,369 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-14 18:00:02,369 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [51833205] [2020-10-14 18:00:02,370 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-14 18:00:02,370 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 18:00:02,370 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-14 18:00:02,371 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-10-14 18:00:02,371 INFO L87 Difference]: Start difference. First operand 52 states and 58 transitions. Second operand 8 states. [2020-10-14 18:00:02,517 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 18:00:02,517 INFO L93 Difference]: Finished difference Result 99 states and 116 transitions. [2020-10-14 18:00:02,518 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-14 18:00:02,518 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 47 [2020-10-14 18:00:02,518 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 18:00:02,519 INFO L225 Difference]: With dead ends: 99 [2020-10-14 18:00:02,519 INFO L226 Difference]: Without dead ends: 58 [2020-10-14 18:00:02,520 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 [2020-10-14 18:00:02,521 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2020-10-14 18:00:02,527 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 58. [2020-10-14 18:00:02,527 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-10-14 18:00:02,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 64 transitions. [2020-10-14 18:00:02,528 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 64 transitions. Word has length 47 [2020-10-14 18:00:02,528 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 18:00:02,529 INFO L479 AbstractCegarLoop]: Abstraction has 58 states and 64 transitions. [2020-10-14 18:00:02,529 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-14 18:00:02,529 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 64 transitions. [2020-10-14 18:00:02,530 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-10-14 18:00:02,530 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 18:00:02,530 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 18:00:02,530 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-14 18:00:02,530 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 18:00:02,531 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 18:00:02,531 INFO L82 PathProgramCache]: Analyzing trace with hash -1179573581, now seen corresponding path program 5 times [2020-10-14 18:00:02,531 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 18:00:02,531 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1739726738] [2020-10-14 18:00:02,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 18:00:02,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:00:02,548 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:00:02,566 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:00:02,587 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:00:02,609 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:00:02,671 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:00:07,546 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:00:07,546 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 61 [2020-10-14 18:00:07,546 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-14 18:00:07,547 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-14 18:00:07,547 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:00:07,547 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:00:07,547 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-14 18:00:07,547 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 18 [2020-10-14 18:00:07,547 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-14 18:00:07,547 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:00:07,627 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 18:00:07,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:00:07,629 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:00:07,632 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:00:07,632 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 18:00:07,632 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:00:07,632 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-14 18:00:07,633 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:00:07,633 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:00:07,633 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:00:07,633 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:00:07,633 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:00:07,633 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:00:07,639 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2020-10-14 18:00:07,640 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1739726738] [2020-10-14 18:00:07,641 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 18:00:07,641 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-14 18:00:07,641 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2111635719] [2020-10-14 18:00:07,641 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-14 18:00:07,642 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 18:00:07,642 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-14 18:00:07,642 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-10-14 18:00:07,642 INFO L87 Difference]: Start difference. First operand 58 states and 64 transitions. Second operand 9 states. [2020-10-14 18:00:07,809 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 18:00:07,809 INFO L93 Difference]: Finished difference Result 110 states and 127 transitions. [2020-10-14 18:00:07,810 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-14 18:00:07,810 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 53 [2020-10-14 18:00:07,810 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 18:00:07,811 INFO L225 Difference]: With dead ends: 110 [2020-10-14 18:00:07,811 INFO L226 Difference]: Without dead ends: 64 [2020-10-14 18:00:07,812 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 [2020-10-14 18:00:07,813 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2020-10-14 18:00:07,822 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 64. [2020-10-14 18:00:07,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-10-14 18:00:07,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 70 transitions. [2020-10-14 18:00:07,823 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 70 transitions. Word has length 53 [2020-10-14 18:00:07,825 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 18:00:07,825 INFO L479 AbstractCegarLoop]: Abstraction has 64 states and 70 transitions. [2020-10-14 18:00:07,825 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-14 18:00:07,826 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 70 transitions. [2020-10-14 18:00:07,826 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2020-10-14 18:00:07,827 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 18:00:07,827 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 18:00:07,827 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-14 18:00:07,827 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 18:00:07,827 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 18:00:07,827 INFO L82 PathProgramCache]: Analyzing trace with hash 1766162870, now seen corresponding path program 6 times [2020-10-14 18:00:07,828 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 18:00:07,828 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2044773433] [2020-10-14 18:00:07,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 18:00:07,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:00:07,853 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:00:07,868 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:00:07,880 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:00:07,896 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:00:08,410 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:00:12,849 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:00:12,849 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 67 [2020-10-14 18:00:12,849 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-14 18:00:12,849 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-14 18:00:12,850 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:00:12,850 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:00:12,850 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-14 18:00:12,850 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 27 [2020-10-14 18:00:12,850 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-14 18:00:12,850 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:00:12,931 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 18:00:12,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:00:12,933 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:00:12,934 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:00:12,935 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 18:00:12,935 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:00:12,935 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-14 18:00:12,935 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:00:12,936 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:00:12,936 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:00:12,936 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:00:12,936 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:00:12,936 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:00:12,942 INFO L134 CoverageAnalysis]: Checked inductivity of 126 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2020-10-14 18:00:12,943 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2044773433] [2020-10-14 18:00:12,943 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 18:00:12,943 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-14 18:00:12,944 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1965758318] [2020-10-14 18:00:12,946 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-14 18:00:12,947 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 18:00:12,947 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-14 18:00:12,948 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2020-10-14 18:00:12,948 INFO L87 Difference]: Start difference. First operand 64 states and 70 transitions. Second operand 10 states. [2020-10-14 18:00:13,119 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 18:00:13,119 INFO L93 Difference]: Finished difference Result 121 states and 138 transitions. [2020-10-14 18:00:13,120 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-14 18:00:13,120 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 59 [2020-10-14 18:00:13,120 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 18:00:13,122 INFO L225 Difference]: With dead ends: 121 [2020-10-14 18:00:13,122 INFO L226 Difference]: Without dead ends: 70 [2020-10-14 18:00:13,125 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 [2020-10-14 18:00:13,125 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2020-10-14 18:00:13,133 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 70. [2020-10-14 18:00:13,134 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2020-10-14 18:00:13,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 76 transitions. [2020-10-14 18:00:13,135 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 76 transitions. Word has length 59 [2020-10-14 18:00:13,137 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 18:00:13,137 INFO L479 AbstractCegarLoop]: Abstraction has 70 states and 76 transitions. [2020-10-14 18:00:13,137 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-14 18:00:13,137 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 76 transitions. [2020-10-14 18:00:13,138 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-10-14 18:00:13,138 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 18:00:13,139 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 18:00:13,139 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-14 18:00:13,139 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 18:00:13,139 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 18:00:13,140 INFO L82 PathProgramCache]: Analyzing trace with hash 728903315, now seen corresponding path program 7 times [2020-10-14 18:00:13,140 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 18:00:13,140 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [737562949] [2020-10-14 18:00:13,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 18:00:13,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:00:13,158 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:00:13,186 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:00:13,213 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:00:13,240 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:00:13,776 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:00:18,158 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:00:18,158 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 73 [2020-10-14 18:00:18,159 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-14 18:00:18,159 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-10-14 18:00:18,159 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:00:18,159 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:00:18,159 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-14 18:00:18,159 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 47 [2020-10-14 18:00:18,159 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 9 [2020-10-14 18:00:18,159 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:00:18,262 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 18:00:18,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:00:18,264 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:00:18,265 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:00:18,266 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 18:00:18,266 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:00:18,266 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 18:00:18,266 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:00:18,266 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:00:18,267 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:00:18,267 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:00:18,267 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:00:18,267 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:00:18,271 INFO L134 CoverageAnalysis]: Checked inductivity of 168 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 140 trivial. 0 not checked. [2020-10-14 18:00:18,272 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [737562949] [2020-10-14 18:00:18,272 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 18:00:18,272 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-14 18:00:18,272 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1891139249] [2020-10-14 18:00:18,273 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-14 18:00:18,273 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 18:00:18,273 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-14 18:00:18,274 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2020-10-14 18:00:18,274 INFO L87 Difference]: Start difference. First operand 70 states and 76 transitions. Second operand 11 states. [2020-10-14 18:00:18,486 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 18:00:18,487 INFO L93 Difference]: Finished difference Result 132 states and 149 transitions. [2020-10-14 18:00:18,487 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-14 18:00:18,487 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 65 [2020-10-14 18:00:18,488 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 18:00:18,488 INFO L225 Difference]: With dead ends: 132 [2020-10-14 18:00:18,488 INFO L226 Difference]: Without dead ends: 76 [2020-10-14 18:00:18,491 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 [2020-10-14 18:00:18,492 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2020-10-14 18:00:18,505 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 76. [2020-10-14 18:00:18,506 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2020-10-14 18:00:18,507 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 82 transitions. [2020-10-14 18:00:18,507 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 82 transitions. Word has length 65 [2020-10-14 18:00:18,508 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 18:00:18,508 INFO L479 AbstractCegarLoop]: Abstraction has 76 states and 82 transitions. [2020-10-14 18:00:18,508 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-14 18:00:18,508 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 82 transitions. [2020-10-14 18:00:18,509 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2020-10-14 18:00:18,509 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 18:00:18,510 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 18:00:18,513 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-14 18:00:18,513 INFO L427 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 18:00:18,514 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 18:00:18,514 INFO L82 PathProgramCache]: Analyzing trace with hash -688629930, now seen corresponding path program 8 times [2020-10-14 18:00:18,514 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 18:00:18,515 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1010346173] [2020-10-14 18:00:18,515 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 18:00:18,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:00:18,535 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:00:18,566 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:00:18,596 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:00:18,627 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:00:19,345 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:00:23,531 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:00:23,531 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 79 [2020-10-14 18:00:23,531 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-14 18:00:23,531 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-14 18:00:23,532 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:00:23,532 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:00:23,532 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-14 18:00:23,532 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 51 [2020-10-14 18:00:23,532 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-14 18:00:23,532 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:00:23,622 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 18:00:23,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:00:23,624 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:00:23,625 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:00:23,625 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 18:00:23,625 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:00:23,625 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 18:00:23,625 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:00:23,625 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:00:23,625 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:00:23,626 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:00:23,626 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:00:23,626 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:00:23,631 INFO L134 CoverageAnalysis]: Checked inductivity of 216 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2020-10-14 18:00:23,631 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1010346173] [2020-10-14 18:00:23,632 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 18:00:23,632 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-14 18:00:23,632 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1095416312] [2020-10-14 18:00:23,632 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-14 18:00:23,633 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 18:00:23,633 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-14 18:00:23,633 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2020-10-14 18:00:23,633 INFO L87 Difference]: Start difference. First operand 76 states and 82 transitions. Second operand 12 states. [2020-10-14 18:00:23,871 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 18:00:23,872 INFO L93 Difference]: Finished difference Result 143 states and 160 transitions. [2020-10-14 18:00:23,872 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-14 18:00:23,872 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 71 [2020-10-14 18:00:23,873 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 18:00:23,874 INFO L225 Difference]: With dead ends: 143 [2020-10-14 18:00:23,874 INFO L226 Difference]: Without dead ends: 82 [2020-10-14 18:00:23,875 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 [2020-10-14 18:00:23,875 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2020-10-14 18:00:23,881 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 82. [2020-10-14 18:00:23,882 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2020-10-14 18:00:23,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 88 transitions. [2020-10-14 18:00:23,883 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 88 transitions. Word has length 71 [2020-10-14 18:00:23,883 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 18:00:23,883 INFO L479 AbstractCegarLoop]: Abstraction has 82 states and 88 transitions. [2020-10-14 18:00:23,883 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-14 18:00:23,883 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 88 transitions. [2020-10-14 18:00:23,884 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2020-10-14 18:00:23,884 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 18:00:23,885 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 18:00:23,885 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-14 18:00:23,885 INFO L427 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 18:00:23,885 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 18:00:23,886 INFO L82 PathProgramCache]: Analyzing trace with hash 1278280307, now seen corresponding path program 9 times [2020-10-14 18:00:23,886 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 18:00:23,886 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [247960513] [2020-10-14 18:00:23,886 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 18:00:23,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:00:23,902 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:00:23,932 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:00:23,962 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:00:23,991 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:00:24,964 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:00:28,901 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:00:28,902 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 85 [2020-10-14 18:00:28,902 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-14 18:00:28,902 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-14 18:00:28,902 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:00:28,903 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:00:28,903 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-14 18:00:28,903 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 33 [2020-10-14 18:00:28,903 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 11 [2020-10-14 18:00:28,903 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:00:29,035 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 18:00:29,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:00:29,037 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:00:29,038 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:00:29,038 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 18:00:29,039 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:00:29,040 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 18:00:29,040 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:00:29,040 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:00:29,041 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:00:29,041 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:00:29,041 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:00:29,041 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 18:00:29,049 INFO L134 CoverageAnalysis]: Checked inductivity of 270 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 225 trivial. 0 not checked. [2020-10-14 18:00:29,050 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [247960513] [2020-10-14 18:00:29,050 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 18:00:29,050 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-14 18:00:29,051 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1438835335] [2020-10-14 18:00:29,051 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-14 18:00:29,052 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 18:00:29,052 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-14 18:00:29,052 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2020-10-14 18:00:29,053 INFO L87 Difference]: Start difference. First operand 82 states and 88 transitions. Second operand 13 states. [2020-10-14 18:00:29,268 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 18:00:29,268 INFO L93 Difference]: Finished difference Result 154 states and 171 transitions. [2020-10-14 18:00:29,269 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-14 18:00:29,269 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 77 [2020-10-14 18:00:29,269 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 18:00:29,270 INFO L225 Difference]: With dead ends: 154 [2020-10-14 18:00:29,270 INFO L226 Difference]: Without dead ends: 88 [2020-10-14 18:00:29,271 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2020-10-14 18:00:29,271 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2020-10-14 18:00:29,278 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 88. [2020-10-14 18:00:29,279 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2020-10-14 18:00:29,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 94 transitions. [2020-10-14 18:00:29,280 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 94 transitions. Word has length 77 [2020-10-14 18:00:29,280 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 18:00:29,280 INFO L479 AbstractCegarLoop]: Abstraction has 88 states and 94 transitions. [2020-10-14 18:00:29,280 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-14 18:00:29,280 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 94 transitions. [2020-10-14 18:00:29,281 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2020-10-14 18:00:29,281 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 18:00:29,281 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 18:00:29,282 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-14 18:00:29,282 INFO L427 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 18:00:29,282 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 18:00:29,282 INFO L82 PathProgramCache]: Analyzing trace with hash -106486538, now seen corresponding path program 10 times [2020-10-14 18:00:29,282 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 18:00:29,283 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [173675056] [2020-10-14 18:00:29,283 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 18:00:29,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:00:29,298 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:00:29,332 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:00:29,369 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:00:29,401 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:00:30,685 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:00:34,294 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:00:34,294 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 91 [2020-10-14 18:00:34,295 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-14 18:00:34,295 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-14 18:00:34,295 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:00:34,295 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:00:34,295 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-14 18:00:34,295 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 47 [2020-10-14 18:00:34,295 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-14 18:00:34,295 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:00:34,425 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 18:00:34,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:00:34,427 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:00:34,428 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:00:34,428 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 18:00:34,428 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:00:34,428 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 18:00:34,428 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:00:34,429 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:00:34,429 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:00:34,429 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:00:34,431 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:00:34,431 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-14 18:00:34,441 INFO L134 CoverageAnalysis]: Checked inductivity of 330 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 275 trivial. 0 not checked. [2020-10-14 18:00:34,441 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [173675056] [2020-10-14 18:00:34,441 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 18:00:34,442 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-14 18:00:34,442 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [229946507] [2020-10-14 18:00:34,443 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-14 18:00:34,443 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 18:00:34,443 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-14 18:00:34,444 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2020-10-14 18:00:34,444 INFO L87 Difference]: Start difference. First operand 88 states and 94 transitions. Second operand 14 states. [2020-10-14 18:00:34,669 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 18:00:34,669 INFO L93 Difference]: Finished difference Result 165 states and 182 transitions. [2020-10-14 18:00:34,670 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-14 18:00:34,670 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 83 [2020-10-14 18:00:34,670 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 18:00:34,671 INFO L225 Difference]: With dead ends: 165 [2020-10-14 18:00:34,672 INFO L226 Difference]: Without dead ends: 94 [2020-10-14 18:00:34,673 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 [2020-10-14 18:00:34,674 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2020-10-14 18:00:34,693 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 94. [2020-10-14 18:00:34,695 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2020-10-14 18:00:34,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 100 transitions. [2020-10-14 18:00:34,696 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 100 transitions. Word has length 83 [2020-10-14 18:00:34,697 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 18:00:34,697 INFO L479 AbstractCegarLoop]: Abstraction has 94 states and 100 transitions. [2020-10-14 18:00:34,697 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-14 18:00:34,697 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 100 transitions. [2020-10-14 18:00:34,700 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2020-10-14 18:00:34,701 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 18:00:34,703 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 18:00:34,703 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-14 18:00:34,704 INFO L427 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 18:00:34,704 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 18:00:34,704 INFO L82 PathProgramCache]: Analyzing trace with hash -391143853, now seen corresponding path program 11 times [2020-10-14 18:00:34,705 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 18:00:34,705 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1011976165] [2020-10-14 18:00:34,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 18:00:34,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:00:34,733 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:00:34,790 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:00:34,850 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:00:34,910 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:00:37,244 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:00:39,731 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:00:39,731 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 97 [2020-10-14 18:00:39,731 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-14 18:00:39,731 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5006 [2020-10-14 18:00:39,732 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:00:39,732 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:00:39,732 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-14 18:00:39,732 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 24 [2020-10-14 18:00:39,732 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 13 [2020-10-14 18:00:39,732 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:00:39,868 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 18:00:39,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:00:39,870 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:00:39,871 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:00:39,872 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 18:00:39,872 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:00:39,872 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-14 18:00:39,873 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:00:39,873 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:00:39,873 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:00:39,874 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:00:39,874 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:00:39,874 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 18:00:39,885 INFO L134 CoverageAnalysis]: Checked inductivity of 396 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 330 trivial. 0 not checked. [2020-10-14 18:00:39,886 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1011976165] [2020-10-14 18:00:39,886 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 18:00:39,886 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-14 18:00:39,887 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1160850704] [2020-10-14 18:00:39,887 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-14 18:00:39,887 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 18:00:39,888 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-14 18:00:39,888 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210 [2020-10-14 18:00:39,888 INFO L87 Difference]: Start difference. First operand 94 states and 100 transitions. Second operand 15 states. [2020-10-14 18:00:40,174 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 18:00:40,174 INFO L93 Difference]: Finished difference Result 176 states and 193 transitions. [2020-10-14 18:00:40,174 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-14 18:00:40,175 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 89 [2020-10-14 18:00:40,175 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 18:00:40,176 INFO L225 Difference]: With dead ends: 176 [2020-10-14 18:00:40,176 INFO L226 Difference]: Without dead ends: 100 [2020-10-14 18:00:40,178 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 [2020-10-14 18:00:40,178 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2020-10-14 18:00:40,193 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 100. [2020-10-14 18:00:40,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 100 states. [2020-10-14 18:00:40,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 106 transitions. [2020-10-14 18:00:40,194 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 106 transitions. Word has length 89 [2020-10-14 18:00:40,194 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 18:00:40,194 INFO L479 AbstractCegarLoop]: Abstraction has 100 states and 106 transitions. [2020-10-14 18:00:40,194 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-14 18:00:40,195 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 106 transitions. [2020-10-14 18:00:40,196 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2020-10-14 18:00:40,196 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 18:00:40,196 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 18:00:40,196 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-14 18:00:40,196 INFO L427 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 18:00:40,196 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 18:00:40,197 INFO L82 PathProgramCache]: Analyzing trace with hash 2080107158, now seen corresponding path program 12 times [2020-10-14 18:00:40,197 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 18:00:40,197 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1520386502] [2020-10-14 18:00:40,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 18:00:40,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:00:40,216 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:00:40,259 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:00:40,306 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:00:40,364 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:00:43,127 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:00:45,211 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:00:45,211 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 103 [2020-10-14 18:00:45,211 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-14 18:00:45,211 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-14 18:00:45,211 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:00:45,211 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:00:45,211 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-14 18:00:45,212 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 53 [2020-10-14 18:00:45,212 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-14 18:00:45,212 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:00:45,371 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 18:00:45,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:00:45,373 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:00:45,374 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:00:45,375 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 18:00:45,375 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:00:45,375 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 18:00:45,375 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:00:45,375 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:00:45,376 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:00:45,376 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:00:45,376 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:00:45,376 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:00:45,386 INFO L134 CoverageAnalysis]: Checked inductivity of 468 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 390 trivial. 0 not checked. [2020-10-14 18:00:45,387 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1520386502] [2020-10-14 18:00:45,387 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 18:00:45,387 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-14 18:00:45,388 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1539613483] [2020-10-14 18:00:45,388 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-14 18:00:45,388 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 18:00:45,389 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-14 18:00:45,390 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=133, Unknown=0, NotChecked=0, Total=240 [2020-10-14 18:00:45,390 INFO L87 Difference]: Start difference. First operand 100 states and 106 transitions. Second operand 16 states. [2020-10-14 18:00:45,657 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 18:00:45,657 INFO L93 Difference]: Finished difference Result 187 states and 204 transitions. [2020-10-14 18:00:45,658 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-14 18:00:45,658 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 95 [2020-10-14 18:00:45,658 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 18:00:45,659 INFO L225 Difference]: With dead ends: 187 [2020-10-14 18:00:45,659 INFO L226 Difference]: Without dead ends: 106 [2020-10-14 18:00:45,660 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 [2020-10-14 18:00:45,660 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2020-10-14 18:00:45,667 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 106. [2020-10-14 18:00:45,670 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 106 states. [2020-10-14 18:00:45,670 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 112 transitions. [2020-10-14 18:00:45,671 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 112 transitions. Word has length 95 [2020-10-14 18:00:45,671 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 18:00:45,671 INFO L479 AbstractCegarLoop]: Abstraction has 106 states and 112 transitions. [2020-10-14 18:00:45,671 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-14 18:00:45,671 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 112 transitions. [2020-10-14 18:00:45,672 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2020-10-14 18:00:45,672 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 18:00:45,672 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 18:00:45,673 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-14 18:00:45,673 INFO L427 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 18:00:45,673 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 18:00:45,673 INFO L82 PathProgramCache]: Analyzing trace with hash -332398029, now seen corresponding path program 13 times [2020-10-14 18:00:45,673 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 18:00:45,674 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [673179451] [2020-10-14 18:00:45,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 18:00:45,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:00:45,697 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:00:45,757 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:00:45,817 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:00:45,856 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:00:48,573 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:00:50,699 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:00:50,699 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 109 [2020-10-14 18:00:50,699 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-14 18:00:50,699 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5009 [2020-10-14 18:00:50,699 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:00:50,700 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:00:50,700 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-14 18:00:50,700 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 71 [2020-10-14 18:00:50,700 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 15 [2020-10-14 18:00:50,700 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:00:50,880 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 18:00:50,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:00:50,881 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:00:50,883 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:00:50,884 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 18:00:50,884 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:00:50,884 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-14 18:00:50,884 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:00:50,884 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:00:50,884 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:00:50,885 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:00:50,885 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:00:50,885 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:00:50,892 INFO L134 CoverageAnalysis]: Checked inductivity of 546 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 455 trivial. 0 not checked. [2020-10-14 18:00:50,892 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [673179451] [2020-10-14 18:00:50,893 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 18:00:50,893 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-14 18:00:50,893 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [362435474] [2020-10-14 18:00:50,894 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-14 18:00:50,894 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 18:00:50,894 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-14 18:00:50,895 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=150, Unknown=0, NotChecked=0, Total=272 [2020-10-14 18:00:50,895 INFO L87 Difference]: Start difference. First operand 106 states and 112 transitions. Second operand 17 states. [2020-10-14 18:00:51,104 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 18:00:51,104 INFO L93 Difference]: Finished difference Result 198 states and 215 transitions. [2020-10-14 18:00:51,105 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-14 18:00:51,105 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 101 [2020-10-14 18:00:51,105 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 18:00:51,106 INFO L225 Difference]: With dead ends: 198 [2020-10-14 18:00:51,106 INFO L226 Difference]: Without dead ends: 112 [2020-10-14 18:00:51,107 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 [2020-10-14 18:00:51,107 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2020-10-14 18:00:51,111 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 112. [2020-10-14 18:00:51,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 112 states. [2020-10-14 18:00:51,112 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 118 transitions. [2020-10-14 18:00:51,112 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 118 transitions. Word has length 101 [2020-10-14 18:00:51,113 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 18:00:51,113 INFO L479 AbstractCegarLoop]: Abstraction has 112 states and 118 transitions. [2020-10-14 18:00:51,113 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-14 18:00:51,113 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 118 transitions. [2020-10-14 18:00:51,114 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2020-10-14 18:00:51,114 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 18:00:51,114 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 18:00:51,114 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-14 18:00:51,114 INFO L427 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 18:00:51,115 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 18:00:51,115 INFO L82 PathProgramCache]: Analyzing trace with hash -904878026, now seen corresponding path program 14 times [2020-10-14 18:00:51,115 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 18:00:51,115 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1797520342] [2020-10-14 18:00:51,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 18:00:51,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:00:51,132 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:00:51,171 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:00:51,214 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:00:51,252 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:00:54,616 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:00:56,139 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:00:56,140 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 115 [2020-10-14 18:00:56,140 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-14 18:00:56,140 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5012 [2020-10-14 18:00:56,140 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:00:56,140 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:00:56,141 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-14 18:00:56,141 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 43 [2020-10-14 18:00:56,141 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-14 18:00:56,141 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:00:56,317 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 18:00:56,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:00:56,319 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:00:56,320 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:00:56,321 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 18:00:56,321 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:00:56,321 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 18:00:56,321 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:00:56,321 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:00:56,322 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:00:56,322 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:00:56,322 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:00:56,322 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:00:56,328 INFO L134 CoverageAnalysis]: Checked inductivity of 630 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 525 trivial. 0 not checked. [2020-10-14 18:00:56,328 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1797520342] [2020-10-14 18:00:56,328 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 18:00:56,328 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-14 18:00:56,329 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1633057177] [2020-10-14 18:00:56,329 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-14 18:00:56,329 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 18:00:56,330 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-14 18:00:56,330 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2020-10-14 18:00:56,330 INFO L87 Difference]: Start difference. First operand 112 states and 118 transitions. Second operand 18 states. [2020-10-14 18:00:56,628 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 18:00:56,628 INFO L93 Difference]: Finished difference Result 209 states and 226 transitions. [2020-10-14 18:00:56,629 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-14 18:00:56,629 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 107 [2020-10-14 18:00:56,629 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 18:00:56,630 INFO L225 Difference]: With dead ends: 209 [2020-10-14 18:00:56,630 INFO L226 Difference]: Without dead ends: 118 [2020-10-14 18:00:56,631 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 [2020-10-14 18:00:56,631 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2020-10-14 18:00:56,635 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 118. [2020-10-14 18:00:56,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 118 states. [2020-10-14 18:00:56,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 124 transitions. [2020-10-14 18:00:56,636 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 124 transitions. Word has length 107 [2020-10-14 18:00:56,636 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 18:00:56,637 INFO L479 AbstractCegarLoop]: Abstraction has 118 states and 124 transitions. [2020-10-14 18:00:56,637 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-14 18:00:56,637 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 124 transitions. [2020-10-14 18:00:56,638 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2020-10-14 18:00:56,638 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 18:00:56,638 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 18:00:56,638 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-14 18:00:56,639 INFO L427 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 18:00:56,639 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 18:00:56,639 INFO L82 PathProgramCache]: Analyzing trace with hash -2139869677, now seen corresponding path program 15 times [2020-10-14 18:00:56,639 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 18:00:56,639 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [216456959] [2020-10-14 18:00:56,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 18:00:56,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:00:56,660 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:00:56,706 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:00:56,747 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:00:56,785 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:01:00,762 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:01:01,664 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:01:01,665 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 121 [2020-10-14 18:01:01,665 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-14 18:01:01,665 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5010 [2020-10-14 18:01:01,665 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:01:01,665 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:01:01,666 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-14 18:01:01,666 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 45 [2020-10-14 18:01:01,666 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-10-14 18:01:01,666 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:01:01,867 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 18:01:01,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:01:01,869 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:01:01,870 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:01:01,870 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 18:01:01,870 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:01:01,870 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 18:01:01,870 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:01:01,871 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:01:01,871 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:01:01,871 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:01:01,871 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:01:01,871 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:01:01,882 INFO L134 CoverageAnalysis]: Checked inductivity of 720 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 600 trivial. 0 not checked. [2020-10-14 18:01:01,882 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [216456959] [2020-10-14 18:01:01,885 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 18:01:01,885 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-10-14 18:01:01,885 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [192838964] [2020-10-14 18:01:01,886 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-14 18:01:01,886 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 18:01:01,886 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-14 18:01:01,887 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=187, Unknown=0, NotChecked=0, Total=342 [2020-10-14 18:01:01,887 INFO L87 Difference]: Start difference. First operand 118 states and 124 transitions. Second operand 19 states. [2020-10-14 18:01:02,206 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 18:01:02,206 INFO L93 Difference]: Finished difference Result 220 states and 237 transitions. [2020-10-14 18:01:02,207 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-14 18:01:02,207 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 113 [2020-10-14 18:01:02,207 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 18:01:02,208 INFO L225 Difference]: With dead ends: 220 [2020-10-14 18:01:02,208 INFO L226 Difference]: Without dead ends: 124 [2020-10-14 18:01:02,209 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 [2020-10-14 18:01:02,211 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2020-10-14 18:01:02,220 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 124. [2020-10-14 18:01:02,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 124 states. [2020-10-14 18:01:02,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 130 transitions. [2020-10-14 18:01:02,221 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 130 transitions. Word has length 113 [2020-10-14 18:01:02,222 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 18:01:02,222 INFO L479 AbstractCegarLoop]: Abstraction has 124 states and 130 transitions. [2020-10-14 18:01:02,222 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-14 18:01:02,222 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 130 transitions. [2020-10-14 18:01:02,223 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2020-10-14 18:01:02,223 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 18:01:02,223 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 16, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 18:01:02,223 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-14 18:01:02,223 INFO L427 AbstractCegarLoop]: === Iteration 17 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 18:01:02,223 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 18:01:02,223 INFO L82 PathProgramCache]: Analyzing trace with hash -243049002, now seen corresponding path program 16 times [2020-10-14 18:01:02,224 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 18:01:02,224 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1545257174] [2020-10-14 18:01:02,224 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 18:01:02,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:01:02,238 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:01:02,285 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:01:02,351 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:01:02,395 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:01:07,237 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:01:07,237 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 127 [2020-10-14 18:01:07,237 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-14 18:01:07,237 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-14 18:01:07,237 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:01:07,237 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:01:07,237 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-14 18:01:07,238 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 18:01:07,238 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-14 18:01:07,238 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:01:07,456 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 18:01:07,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:01:07,457 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:01:07,458 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:01:07,459 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 18:01:07,459 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:01:07,459 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 18:01:07,459 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:01:07,459 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:01:07,459 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:01:07,460 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:01:07,460 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:01:07,460 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:01:07,468 INFO L134 CoverageAnalysis]: Checked inductivity of 816 backedges. 0 proven. 136 refuted. 0 times theorem prover too weak. 680 trivial. 0 not checked. [2020-10-14 18:01:07,468 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1545257174] [2020-10-14 18:01:07,469 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 18:01:07,469 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-10-14 18:01:07,469 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1307563893] [2020-10-14 18:01:07,469 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-14 18:01:07,470 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 18:01:07,470 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-14 18:01:07,470 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=207, Unknown=0, NotChecked=0, Total=380 [2020-10-14 18:01:07,470 INFO L87 Difference]: Start difference. First operand 124 states and 130 transitions. Second operand 20 states. [2020-10-14 18:01:07,794 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 18:01:07,794 INFO L93 Difference]: Finished difference Result 231 states and 248 transitions. [2020-10-14 18:01:07,795 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-14 18:01:07,795 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 119 [2020-10-14 18:01:07,795 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 18:01:07,797 INFO L225 Difference]: With dead ends: 231 [2020-10-14 18:01:07,797 INFO L226 Difference]: Without dead ends: 130 [2020-10-14 18:01:07,798 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=173, Invalid=207, Unknown=0, NotChecked=0, Total=380 [2020-10-14 18:01:07,799 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2020-10-14 18:01:07,804 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 130. [2020-10-14 18:01:07,804 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 130 states. [2020-10-14 18:01:07,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 136 transitions. [2020-10-14 18:01:07,805 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 136 transitions. Word has length 119 [2020-10-14 18:01:07,805 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 18:01:07,805 INFO L479 AbstractCegarLoop]: Abstraction has 130 states and 136 transitions. [2020-10-14 18:01:07,806 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-14 18:01:07,806 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 136 transitions. [2020-10-14 18:01:07,807 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2020-10-14 18:01:07,807 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 18:01:07,807 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 17, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 18:01:07,807 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-14 18:01:07,807 INFO L427 AbstractCegarLoop]: === Iteration 18 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 18:01:07,808 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 18:01:07,808 INFO L82 PathProgramCache]: Analyzing trace with hash 767435251, now seen corresponding path program 17 times [2020-10-14 18:01:07,808 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 18:01:07,808 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [378012516] [2020-10-14 18:01:07,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 18:01:07,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:01:07,823 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:01:07,872 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:01:07,919 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:01:07,966 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:01:12,833 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:01:12,833 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 133 [2020-10-14 18:01:12,834 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-14 18:01:12,834 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5013 [2020-10-14 18:01:12,834 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:01:12,834 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:01:12,834 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 19 [2020-10-14 18:01:12,834 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 30 [2020-10-14 18:01:12,834 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 19 [2020-10-14 18:01:12,834 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:01:13,069 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 18:01:13,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:01:13,071 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:01:13,072 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:01:13,072 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 18:01:13,072 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:01:13,072 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 18:01:13,072 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:01:13,072 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:01:13,073 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:01:13,073 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:01:13,073 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:01:13,073 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:01:13,081 INFO L134 CoverageAnalysis]: Checked inductivity of 918 backedges. 0 proven. 153 refuted. 0 times theorem prover too weak. 765 trivial. 0 not checked. [2020-10-14 18:01:13,082 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [378012516] [2020-10-14 18:01:13,082 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 18:01:13,082 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-10-14 18:01:13,082 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1597750157] [2020-10-14 18:01:13,083 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-14 18:01:13,083 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 18:01:13,083 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-14 18:01:13,084 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=192, Invalid=228, Unknown=0, NotChecked=0, Total=420 [2020-10-14 18:01:13,084 INFO L87 Difference]: Start difference. First operand 130 states and 136 transitions. Second operand 21 states. [2020-10-14 18:01:13,418 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 18:01:13,419 INFO L93 Difference]: Finished difference Result 242 states and 259 transitions. [2020-10-14 18:01:13,419 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-14 18:01:13,419 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 125 [2020-10-14 18:01:13,419 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 18:01:13,420 INFO L225 Difference]: With dead ends: 242 [2020-10-14 18:01:13,420 INFO L226 Difference]: Without dead ends: 136 [2020-10-14 18:01:13,421 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 [2020-10-14 18:01:13,422 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2020-10-14 18:01:13,429 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 136. [2020-10-14 18:01:13,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 136 states. [2020-10-14 18:01:13,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 142 transitions. [2020-10-14 18:01:13,430 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 142 transitions. Word has length 125 [2020-10-14 18:01:13,431 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 18:01:13,431 INFO L479 AbstractCegarLoop]: Abstraction has 136 states and 142 transitions. [2020-10-14 18:01:13,431 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-14 18:01:13,431 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 142 transitions. [2020-10-14 18:01:13,432 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2020-10-14 18:01:13,432 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 18:01:13,432 INFO L422 BasicCegarLoop]: trace histogram [18, 18, 18, 18, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 18:01:13,433 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-14 18:01:13,433 INFO L427 AbstractCegarLoop]: === Iteration 19 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 18:01:13,433 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 18:01:13,433 INFO L82 PathProgramCache]: Analyzing trace with hash -2123232394, now seen corresponding path program 18 times [2020-10-14 18:01:13,433 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 18:01:13,434 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [637404140] [2020-10-14 18:01:13,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 18:01:13,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:01:13,453 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:01:13,525 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:01:13,578 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:01:13,629 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:01:18,455 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:01:18,455 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 139 [2020-10-14 18:01:18,455 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-14 18:01:18,455 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5007 [2020-10-14 18:01:18,455 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:01:18,455 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:01:18,456 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-10-14 18:01:18,456 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 51 [2020-10-14 18:01:18,456 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-14 18:01:18,456 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:01:18,724 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 18:01:18,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:01:18,727 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:01:18,728 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:01:18,728 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 18:01:18,728 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:01:18,728 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 18:01:18,728 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:01:18,728 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:01:18,729 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:01:18,729 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:01:18,729 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:01:18,729 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:01:18,737 INFO L134 CoverageAnalysis]: Checked inductivity of 1026 backedges. 0 proven. 171 refuted. 0 times theorem prover too weak. 855 trivial. 0 not checked. [2020-10-14 18:01:18,737 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [637404140] [2020-10-14 18:01:18,737 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 18:01:18,737 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-10-14 18:01:18,738 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [170724510] [2020-10-14 18:01:18,738 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-14 18:01:18,738 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 18:01:18,738 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-14 18:01:18,739 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=212, Invalid=250, Unknown=0, NotChecked=0, Total=462 [2020-10-14 18:01:18,739 INFO L87 Difference]: Start difference. First operand 136 states and 142 transitions. Second operand 22 states. [2020-10-14 18:01:19,080 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 18:01:19,080 INFO L93 Difference]: Finished difference Result 253 states and 270 transitions. [2020-10-14 18:01:19,081 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-14 18:01:19,081 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 131 [2020-10-14 18:01:19,081 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 18:01:19,082 INFO L225 Difference]: With dead ends: 253 [2020-10-14 18:01:19,082 INFO L226 Difference]: Without dead ends: 142 [2020-10-14 18:01:19,084 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 [2020-10-14 18:01:19,084 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2020-10-14 18:01:19,090 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 142. [2020-10-14 18:01:19,090 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 142 states. [2020-10-14 18:01:19,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 148 transitions. [2020-10-14 18:01:19,091 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 148 transitions. Word has length 131 [2020-10-14 18:01:19,091 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 18:01:19,091 INFO L479 AbstractCegarLoop]: Abstraction has 142 states and 148 transitions. [2020-10-14 18:01:19,091 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-14 18:01:19,091 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 148 transitions. [2020-10-14 18:01:19,092 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2020-10-14 18:01:19,092 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 18:01:19,092 INFO L422 BasicCegarLoop]: trace histogram [19, 19, 19, 19, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 18:01:19,093 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-14 18:01:19,093 INFO L427 AbstractCegarLoop]: === Iteration 20 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 18:01:19,093 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 18:01:19,093 INFO L82 PathProgramCache]: Analyzing trace with hash -87040557, now seen corresponding path program 19 times [2020-10-14 18:01:19,093 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 18:01:19,094 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2086235998] [2020-10-14 18:01:19,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 18:01:19,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:01:19,112 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:01:19,164 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:01:19,216 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:01:19,269 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:01:24,113 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:01:24,113 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 145 [2020-10-14 18:01:24,113 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-14 18:01:24,113 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5006 [2020-10-14 18:01:24,114 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:01:24,114 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:01:24,114 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 21 [2020-10-14 18:01:24,114 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 53 [2020-10-14 18:01:24,114 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 21 [2020-10-14 18:01:24,114 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:01:24,384 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 18:01:24,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:01:24,386 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:01:24,386 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:01:24,387 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 18:01:24,387 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:01:24,387 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 18:01:24,387 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:01:24,387 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:01:24,387 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:01:24,387 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:01:24,388 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:01:24,388 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:01:24,396 INFO L134 CoverageAnalysis]: Checked inductivity of 1140 backedges. 0 proven. 190 refuted. 0 times theorem prover too weak. 950 trivial. 0 not checked. [2020-10-14 18:01:24,397 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2086235998] [2020-10-14 18:01:24,397 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 18:01:24,397 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-10-14 18:01:24,397 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1810371842] [2020-10-14 18:01:24,397 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-14 18:01:24,398 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 18:01:24,398 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-14 18:01:24,398 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=233, Invalid=273, Unknown=0, NotChecked=0, Total=506 [2020-10-14 18:01:24,398 INFO L87 Difference]: Start difference. First operand 142 states and 148 transitions. Second operand 23 states. [2020-10-14 18:01:24,751 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 18:01:24,751 INFO L93 Difference]: Finished difference Result 264 states and 281 transitions. [2020-10-14 18:01:24,752 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-14 18:01:24,752 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 137 [2020-10-14 18:01:24,752 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 18:01:24,753 INFO L225 Difference]: With dead ends: 264 [2020-10-14 18:01:24,753 INFO L226 Difference]: Without dead ends: 148 [2020-10-14 18:01:24,754 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 [2020-10-14 18:01:24,755 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2020-10-14 18:01:24,760 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 148. [2020-10-14 18:01:24,760 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 148 states. [2020-10-14 18:01:24,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 154 transitions. [2020-10-14 18:01:24,761 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 154 transitions. Word has length 137 [2020-10-14 18:01:24,761 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 18:01:24,761 INFO L479 AbstractCegarLoop]: Abstraction has 148 states and 154 transitions. [2020-10-14 18:01:24,761 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-14 18:01:24,762 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 154 transitions. [2020-10-14 18:01:24,763 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2020-10-14 18:01:24,763 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 18:01:24,763 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 18:01:24,763 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-10-14 18:01:24,764 INFO L427 AbstractCegarLoop]: === Iteration 21 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 18:01:24,764 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 18:01:24,764 INFO L82 PathProgramCache]: Analyzing trace with hash 1786425622, now seen corresponding path program 20 times [2020-10-14 18:01:24,764 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 18:01:24,764 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1309191029] [2020-10-14 18:01:24,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 18:01:24,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:01:24,788 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:01:24,848 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:01:24,909 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:01:24,968 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:01:29,799 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:01:29,800 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 151 [2020-10-14 18:01:29,800 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-14 18:01:29,800 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5020 [2020-10-14 18:01:29,800 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:01:29,800 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:01:29,800 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 22 [2020-10-14 18:01:29,801 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 55 [2020-10-14 18:01:29,801 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-14 18:01:29,801 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:01:30,081 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 18:01:30,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:01:30,084 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:01:30,086 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:01:30,086 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 18:01:30,086 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:01:30,086 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-14 18:01:30,087 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:01:30,087 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:01:30,087 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:01:30,087 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:01:30,087 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:01:30,087 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:01:30,098 INFO L134 CoverageAnalysis]: Checked inductivity of 1260 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 1050 trivial. 0 not checked. [2020-10-14 18:01:30,099 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1309191029] [2020-10-14 18:01:30,099 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 18:01:30,099 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2020-10-14 18:01:30,099 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1708428338] [2020-10-14 18:01:30,100 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-14 18:01:30,100 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 18:01:30,100 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-14 18:01:30,100 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=255, Invalid=297, Unknown=0, NotChecked=0, Total=552 [2020-10-14 18:01:30,101 INFO L87 Difference]: Start difference. First operand 148 states and 154 transitions. Second operand 24 states. [2020-10-14 18:01:30,506 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 18:01:30,506 INFO L93 Difference]: Finished difference Result 275 states and 292 transitions. [2020-10-14 18:01:30,507 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-14 18:01:30,507 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 143 [2020-10-14 18:01:30,507 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 18:01:30,508 INFO L225 Difference]: With dead ends: 275 [2020-10-14 18:01:30,508 INFO L226 Difference]: Without dead ends: 154 [2020-10-14 18:01:30,510 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 [2020-10-14 18:01:30,510 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2020-10-14 18:01:30,515 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 154. [2020-10-14 18:01:30,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 154 states. [2020-10-14 18:01:30,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 160 transitions. [2020-10-14 18:01:30,517 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 160 transitions. Word has length 143 [2020-10-14 18:01:30,517 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 18:01:30,517 INFO L479 AbstractCegarLoop]: Abstraction has 154 states and 160 transitions. [2020-10-14 18:01:30,517 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-14 18:01:30,517 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 160 transitions. [2020-10-14 18:01:30,519 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2020-10-14 18:01:30,519 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 18:01:30,519 INFO L422 BasicCegarLoop]: trace histogram [21, 21, 21, 21, 21, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 18:01:30,519 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-10-14 18:01:30,519 INFO L427 AbstractCegarLoop]: === Iteration 22 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 18:01:30,520 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 18:01:30,520 INFO L82 PathProgramCache]: Analyzing trace with hash -1930731085, now seen corresponding path program 21 times [2020-10-14 18:01:30,520 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 18:01:30,520 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [306081445] [2020-10-14 18:01:30,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 18:01:30,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:01:30,547 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:01:30,604 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:01:30,674 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:01:30,740 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:01:35,546 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:01:35,547 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 157 [2020-10-14 18:01:35,547 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-14 18:01:35,547 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5007 [2020-10-14 18:01:35,547 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:01:35,547 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:01:35,547 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 23 [2020-10-14 18:01:35,547 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 80 [2020-10-14 18:01:35,547 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-10-14 18:01:35,547 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:01:35,875 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 18:01:35,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:01:35,877 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:01:35,878 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:01:35,878 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 18:01:35,878 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:01:35,878 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 18:01:35,879 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:01:35,879 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:01:35,879 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:01:35,879 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:01:35,879 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:01:35,879 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:01:35,889 INFO L134 CoverageAnalysis]: Checked inductivity of 1386 backedges. 0 proven. 231 refuted. 0 times theorem prover too weak. 1155 trivial. 0 not checked. [2020-10-14 18:01:35,890 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [306081445] [2020-10-14 18:01:35,890 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 18:01:35,890 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2020-10-14 18:01:35,890 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [102662194] [2020-10-14 18:01:35,890 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-14 18:01:35,890 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 18:01:35,891 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-14 18:01:35,891 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=278, Invalid=322, Unknown=0, NotChecked=0, Total=600 [2020-10-14 18:01:35,891 INFO L87 Difference]: Start difference. First operand 154 states and 160 transitions. Second operand 25 states. [2020-10-14 18:01:36,228 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 18:01:36,229 INFO L93 Difference]: Finished difference Result 286 states and 303 transitions. [2020-10-14 18:01:36,231 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-14 18:01:36,232 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 149 [2020-10-14 18:01:36,232 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 18:01:36,233 INFO L225 Difference]: With dead ends: 286 [2020-10-14 18:01:36,233 INFO L226 Difference]: Without dead ends: 160 [2020-10-14 18:01:36,234 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=278, Invalid=322, Unknown=0, NotChecked=0, Total=600 [2020-10-14 18:01:36,234 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2020-10-14 18:01:36,240 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 160. [2020-10-14 18:01:36,240 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 160 states. [2020-10-14 18:01:36,241 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 166 transitions. [2020-10-14 18:01:36,241 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 166 transitions. Word has length 149 [2020-10-14 18:01:36,241 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 18:01:36,241 INFO L479 AbstractCegarLoop]: Abstraction has 160 states and 166 transitions. [2020-10-14 18:01:36,242 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-14 18:01:36,242 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 166 transitions. [2020-10-14 18:01:36,243 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2020-10-14 18:01:36,243 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 18:01:36,243 INFO L422 BasicCegarLoop]: trace histogram [22, 22, 22, 22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 18:01:36,243 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-10-14 18:01:36,244 INFO L427 AbstractCegarLoop]: === Iteration 23 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 18:01:36,244 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 18:01:36,244 INFO L82 PathProgramCache]: Analyzing trace with hash -558149962, now seen corresponding path program 22 times [2020-10-14 18:01:36,244 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 18:01:36,244 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [968136326] [2020-10-14 18:01:36,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 18:01:36,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:01:36,276 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:01:36,334 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:01:36,415 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:01:36,489 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:01:41,275 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:01:41,275 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 163 [2020-10-14 18:01:41,275 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-14 18:01:41,275 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5010 [2020-10-14 18:01:41,276 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:01:41,276 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:01:41,276 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 24 [2020-10-14 18:01:41,276 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 35 [2020-10-14 18:01:41,276 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-10-14 18:01:41,277 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:01:41,589 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 18:01:41,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:01:41,592 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:01:41,593 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:01:41,593 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 18:01:41,593 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:01:41,593 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 18:01:41,593 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:01:41,593 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:01:41,594 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:01:41,594 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:01:41,594 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:01:41,594 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:01:41,608 INFO L134 CoverageAnalysis]: Checked inductivity of 1518 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 1265 trivial. 0 not checked. [2020-10-14 18:01:41,609 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [968136326] [2020-10-14 18:01:41,609 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 18:01:41,609 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2020-10-14 18:01:41,609 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1242014722] [2020-10-14 18:01:41,610 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-10-14 18:01:41,610 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 18:01:41,610 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-10-14 18:01:41,611 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=302, Invalid=348, Unknown=0, NotChecked=0, Total=650 [2020-10-14 18:01:41,611 INFO L87 Difference]: Start difference. First operand 160 states and 166 transitions. Second operand 26 states. [2020-10-14 18:01:41,990 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 18:01:41,991 INFO L93 Difference]: Finished difference Result 297 states and 314 transitions. [2020-10-14 18:01:41,991 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-14 18:01:41,991 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 155 [2020-10-14 18:01:41,991 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 18:01:41,993 INFO L225 Difference]: With dead ends: 297 [2020-10-14 18:01:41,993 INFO L226 Difference]: Without dead ends: 166 [2020-10-14 18:01:41,995 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=302, Invalid=348, Unknown=0, NotChecked=0, Total=650 [2020-10-14 18:01:41,995 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2020-10-14 18:01:42,009 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 166. [2020-10-14 18:01:42,010 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 166 states. [2020-10-14 18:01:42,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 172 transitions. [2020-10-14 18:01:42,011 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 172 transitions. Word has length 155 [2020-10-14 18:01:42,011 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 18:01:42,011 INFO L479 AbstractCegarLoop]: Abstraction has 166 states and 172 transitions. [2020-10-14 18:01:42,011 INFO L480 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-10-14 18:01:42,011 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 172 transitions. [2020-10-14 18:01:42,013 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 162 [2020-10-14 18:01:42,013 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 18:01:42,016 INFO L422 BasicCegarLoop]: trace histogram [23, 23, 23, 23, 23, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 18:01:42,017 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-10-14 18:01:42,017 INFO L427 AbstractCegarLoop]: === Iteration 24 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 18:01:42,017 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 18:01:42,017 INFO L82 PathProgramCache]: Analyzing trace with hash 1204989331, now seen corresponding path program 23 times [2020-10-14 18:01:42,018 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 18:01:42,018 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [535095202] [2020-10-14 18:01:42,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 18:01:42,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:01:42,053 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:01:42,141 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:01:42,248 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:01:42,326 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:01:47,041 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:01:47,042 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 169 [2020-10-14 18:01:47,042 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-14 18:01:47,042 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-14 18:01:47,042 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:01:47,042 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:01:47,042 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 25 [2020-10-14 18:01:47,042 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 36 [2020-10-14 18:01:47,042 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 25 [2020-10-14 18:01:47,043 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:01:47,420 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 18:01:47,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:01:47,422 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:01:47,423 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:01:47,423 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 18:01:47,423 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:01:47,423 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 18:01:47,423 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:01:47,424 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:01:47,424 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:01:47,424 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:01:47,424 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:01:47,424 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:01:47,435 INFO L134 CoverageAnalysis]: Checked inductivity of 1656 backedges. 0 proven. 276 refuted. 0 times theorem prover too weak. 1380 trivial. 0 not checked. [2020-10-14 18:01:47,436 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [535095202] [2020-10-14 18:01:47,436 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 18:01:47,436 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2020-10-14 18:01:47,436 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [956531203] [2020-10-14 18:01:47,437 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-10-14 18:01:47,437 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 18:01:47,437 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-10-14 18:01:47,437 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=327, Invalid=375, Unknown=0, NotChecked=0, Total=702 [2020-10-14 18:01:47,437 INFO L87 Difference]: Start difference. First operand 166 states and 172 transitions. Second operand 27 states. [2020-10-14 18:01:47,808 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 18:01:47,808 INFO L93 Difference]: Finished difference Result 308 states and 325 transitions. [2020-10-14 18:01:47,809 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-14 18:01:47,809 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 161 [2020-10-14 18:01:47,809 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 18:01:47,810 INFO L225 Difference]: With dead ends: 308 [2020-10-14 18:01:47,810 INFO L226 Difference]: Without dead ends: 172 [2020-10-14 18:01:47,811 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 [2020-10-14 18:01:47,812 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2020-10-14 18:01:47,827 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 172. [2020-10-14 18:01:47,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 172 states. [2020-10-14 18:01:47,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 172 states to 172 states and 178 transitions. [2020-10-14 18:01:47,828 INFO L78 Accepts]: Start accepts. Automaton has 172 states and 178 transitions. Word has length 161 [2020-10-14 18:01:47,829 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 18:01:47,829 INFO L479 AbstractCegarLoop]: Abstraction has 172 states and 178 transitions. [2020-10-14 18:01:47,829 INFO L480 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-10-14 18:01:47,829 INFO L276 IsEmpty]: Start isEmpty. Operand 172 states and 178 transitions. [2020-10-14 18:01:47,830 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 168 [2020-10-14 18:01:47,830 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 18:01:47,830 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 24, 24, 24, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 18:01:47,831 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-10-14 18:01:47,831 INFO L427 AbstractCegarLoop]: === Iteration 25 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 18:01:47,833 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 18:01:47,833 INFO L82 PathProgramCache]: Analyzing trace with hash 835839062, now seen corresponding path program 24 times [2020-10-14 18:01:47,833 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 18:01:47,833 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1492525968] [2020-10-14 18:01:47,834 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 18:01:47,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:01:47,870 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:01:47,988 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:01:48,080 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:01:48,162 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:01:52,872 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:01:52,873 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 175 [2020-10-14 18:01:52,873 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-14 18:01:52,873 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5015 [2020-10-14 18:01:52,873 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:01:52,873 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:01:52,873 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 26 [2020-10-14 18:01:52,873 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 89 [2020-10-14 18:01:52,873 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-14 18:01:52,874 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:01:53,265 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 18:01:53,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:01:53,267 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:01:53,268 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:01:53,268 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 18:01:53,268 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:01:53,269 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 18:01:53,269 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:01:53,269 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:01:53,269 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:01:53,269 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:01:53,269 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:01:53,270 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:01:53,288 INFO L134 CoverageAnalysis]: Checked inductivity of 1800 backedges. 0 proven. 300 refuted. 0 times theorem prover too weak. 1500 trivial. 0 not checked. [2020-10-14 18:01:53,288 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1492525968] [2020-10-14 18:01:53,288 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 18:01:53,289 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2020-10-14 18:01:53,289 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [901088702] [2020-10-14 18:01:53,289 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-10-14 18:01:53,289 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 18:01:53,290 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-10-14 18:01:53,290 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=353, Invalid=403, Unknown=0, NotChecked=0, Total=756 [2020-10-14 18:01:53,290 INFO L87 Difference]: Start difference. First operand 172 states and 178 transitions. Second operand 28 states. [2020-10-14 18:01:53,698 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 18:01:53,698 INFO L93 Difference]: Finished difference Result 319 states and 336 transitions. [2020-10-14 18:01:53,698 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-14 18:01:53,698 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 167 [2020-10-14 18:01:53,699 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 18:01:53,700 INFO L225 Difference]: With dead ends: 319 [2020-10-14 18:01:53,700 INFO L226 Difference]: Without dead ends: 178 [2020-10-14 18:01:53,701 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=353, Invalid=403, Unknown=0, NotChecked=0, Total=756 [2020-10-14 18:01:53,701 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178 states. [2020-10-14 18:01:53,710 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178 to 178. [2020-10-14 18:01:53,710 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 178 states. [2020-10-14 18:01:53,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 178 states to 178 states and 184 transitions. [2020-10-14 18:01:53,712 INFO L78 Accepts]: Start accepts. Automaton has 178 states and 184 transitions. Word has length 167 [2020-10-14 18:01:53,713 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 18:01:53,713 INFO L479 AbstractCegarLoop]: Abstraction has 178 states and 184 transitions. [2020-10-14 18:01:53,713 INFO L480 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-10-14 18:01:53,714 INFO L276 IsEmpty]: Start isEmpty. Operand 178 states and 184 transitions. [2020-10-14 18:01:53,715 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 174 [2020-10-14 18:01:53,715 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 18:01:53,716 INFO L422 BasicCegarLoop]: trace histogram [25, 25, 25, 25, 25, 25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 18:01:53,716 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-10-14 18:01:53,716 INFO L427 AbstractCegarLoop]: === Iteration 26 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 18:01:53,717 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 18:01:53,717 INFO L82 PathProgramCache]: Analyzing trace with hash 1841807731, now seen corresponding path program 25 times [2020-10-14 18:01:53,717 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 18:01:53,717 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [43414729] [2020-10-14 18:01:53,718 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 18:01:53,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:01:53,767 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:01:53,926 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:01:54,054 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:01:54,149 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:01:58,774 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:01:58,774 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 181 [2020-10-14 18:01:58,775 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-14 18:01:58,775 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5025 [2020-10-14 18:01:58,775 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:01:58,775 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:01:58,775 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 27 [2020-10-14 18:01:58,775 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 18:01:58,775 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 27 [2020-10-14 18:01:58,775 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:01:59,301 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 18:01:59,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:01:59,304 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:01:59,306 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:01:59,307 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 18:01:59,307 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:01:59,307 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-14 18:01:59,308 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:01:59,308 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:01:59,308 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:01:59,309 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:01:59,310 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:01:59,310 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-14 18:01:59,344 INFO L134 CoverageAnalysis]: Checked inductivity of 1950 backedges. 0 proven. 325 refuted. 0 times theorem prover too weak. 1625 trivial. 0 not checked. [2020-10-14 18:01:59,345 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [43414729] [2020-10-14 18:01:59,345 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 18:01:59,345 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29] total 29 [2020-10-14 18:01:59,346 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [108546121] [2020-10-14 18:01:59,348 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-10-14 18:01:59,348 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 18:01:59,349 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-10-14 18:01:59,349 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=380, Invalid=432, Unknown=0, NotChecked=0, Total=812 [2020-10-14 18:01:59,349 INFO L87 Difference]: Start difference. First operand 178 states and 184 transitions. Second operand 29 states. [2020-10-14 18:01:59,933 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 18:01:59,934 INFO L93 Difference]: Finished difference Result 330 states and 347 transitions. [2020-10-14 18:01:59,934 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-14 18:01:59,934 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 173 [2020-10-14 18:01:59,935 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 18:01:59,936 INFO L225 Difference]: With dead ends: 330 [2020-10-14 18:01:59,937 INFO L226 Difference]: Without dead ends: 184 [2020-10-14 18:01:59,938 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=380, Invalid=432, Unknown=0, NotChecked=0, Total=812 [2020-10-14 18:01:59,939 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 184 states. [2020-10-14 18:01:59,948 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 184 to 184. [2020-10-14 18:01:59,949 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 184 states. [2020-10-14 18:01:59,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 184 states to 184 states and 190 transitions. [2020-10-14 18:01:59,950 INFO L78 Accepts]: Start accepts. Automaton has 184 states and 190 transitions. Word has length 173 [2020-10-14 18:01:59,951 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 18:01:59,951 INFO L479 AbstractCegarLoop]: Abstraction has 184 states and 190 transitions. [2020-10-14 18:01:59,951 INFO L480 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-10-14 18:01:59,951 INFO L276 IsEmpty]: Start isEmpty. Operand 184 states and 190 transitions. [2020-10-14 18:01:59,953 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 180 [2020-10-14 18:01:59,953 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 18:01:59,953 INFO L422 BasicCegarLoop]: trace histogram [26, 26, 26, 26, 26, 26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 18:01:59,954 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-10-14 18:01:59,954 INFO L427 AbstractCegarLoop]: === Iteration 27 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 18:01:59,954 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 18:01:59,955 INFO L82 PathProgramCache]: Analyzing trace with hash -1193512458, now seen corresponding path program 26 times [2020-10-14 18:01:59,955 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 18:01:59,955 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1384162992] [2020-10-14 18:01:59,955 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 18:01:59,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:02:00,011 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:02:00,225 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:02:00,412 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:02:00,544 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:02:05,018 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:02:05,018 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 187 [2020-10-14 18:02:05,018 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-14 18:02:05,018 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5027 [2020-10-14 18:02:05,018 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:02:05,018 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:02:05,019 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 28 [2020-10-14 18:02:05,019 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 67 [2020-10-14 18:02:05,019 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-10-14 18:02:05,019 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:02:05,601 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 18:02:05,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:02:05,603 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:02:05,604 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:02:05,604 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 18:02:05,605 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:02:05,605 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 18:02:05,605 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:02:05,606 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:02:05,606 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:02:05,606 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:02:05,607 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:02:05,607 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 18:02:05,646 INFO L134 CoverageAnalysis]: Checked inductivity of 2106 backedges. 0 proven. 351 refuted. 0 times theorem prover too weak. 1755 trivial. 0 not checked. [2020-10-14 18:02:05,647 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1384162992] [2020-10-14 18:02:05,647 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 18:02:05,647 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30] total 30 [2020-10-14 18:02:05,648 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [546456792] [2020-10-14 18:02:05,648 INFO L459 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-10-14 18:02:05,649 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 18:02:05,649 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-10-14 18:02:05,650 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=408, Invalid=462, Unknown=0, NotChecked=0, Total=870 [2020-10-14 18:02:05,650 INFO L87 Difference]: Start difference. First operand 184 states and 190 transitions. Second operand 30 states. [2020-10-14 18:02:06,243 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 18:02:06,243 INFO L93 Difference]: Finished difference Result 341 states and 358 transitions. [2020-10-14 18:02:06,243 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-10-14 18:02:06,244 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 179 [2020-10-14 18:02:06,244 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 18:02:06,245 INFO L225 Difference]: With dead ends: 341 [2020-10-14 18:02:06,246 INFO L226 Difference]: Without dead ends: 190 [2020-10-14 18:02:06,247 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=408, Invalid=462, Unknown=0, NotChecked=0, Total=870 [2020-10-14 18:02:06,247 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 190 states. [2020-10-14 18:02:06,254 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 190 to 190. [2020-10-14 18:02:06,254 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 190 states. [2020-10-14 18:02:06,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 190 states to 190 states and 196 transitions. [2020-10-14 18:02:06,255 INFO L78 Accepts]: Start accepts. Automaton has 190 states and 196 transitions. Word has length 179 [2020-10-14 18:02:06,256 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 18:02:06,256 INFO L479 AbstractCegarLoop]: Abstraction has 190 states and 196 transitions. [2020-10-14 18:02:06,256 INFO L480 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-10-14 18:02:06,256 INFO L276 IsEmpty]: Start isEmpty. Operand 190 states and 196 transitions. [2020-10-14 18:02:06,257 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 186 [2020-10-14 18:02:06,257 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 18:02:06,257 INFO L422 BasicCegarLoop]: trace histogram [27, 27, 27, 27, 27, 27, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 18:02:06,257 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-10-14 18:02:06,258 INFO L427 AbstractCegarLoop]: === Iteration 28 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 18:02:06,258 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 18:02:06,258 INFO L82 PathProgramCache]: Analyzing trace with hash 1066179923, now seen corresponding path program 27 times [2020-10-14 18:02:06,258 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 18:02:06,258 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [186132321] [2020-10-14 18:02:06,258 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 18:02:06,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:02:06,300 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:02:06,472 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:02:06,699 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:02:06,912 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:02:11,306 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:02:11,306 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 193 [2020-10-14 18:02:11,306 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-14 18:02:11,307 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5021 [2020-10-14 18:02:11,307 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:02:11,307 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:02:11,307 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 29 [2020-10-14 18:02:11,307 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 18:02:11,307 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 29 [2020-10-14 18:02:11,308 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:02:11,854 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 18:02:11,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:02:11,856 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:02:11,857 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:02:11,858 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 18:02:11,858 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:02:11,858 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 18:02:11,859 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:02:11,859 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:02:11,859 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:02:11,859 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:02:11,860 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:02:11,860 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 18:02:11,882 INFO L134 CoverageAnalysis]: Checked inductivity of 2268 backedges. 0 proven. 378 refuted. 0 times theorem prover too weak. 1890 trivial. 0 not checked. [2020-10-14 18:02:11,882 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [186132321] [2020-10-14 18:02:11,882 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 18:02:11,882 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31] total 31 [2020-10-14 18:02:11,883 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [387592243] [2020-10-14 18:02:11,884 INFO L459 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-10-14 18:02:11,884 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 18:02:11,884 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-10-14 18:02:11,885 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=437, Invalid=493, Unknown=0, NotChecked=0, Total=930 [2020-10-14 18:02:11,885 INFO L87 Difference]: Start difference. First operand 190 states and 196 transitions. Second operand 31 states. [2020-10-14 18:02:12,298 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 18:02:12,298 INFO L93 Difference]: Finished difference Result 352 states and 369 transitions. [2020-10-14 18:02:12,298 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-14 18:02:12,299 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 185 [2020-10-14 18:02:12,299 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 18:02:12,301 INFO L225 Difference]: With dead ends: 352 [2020-10-14 18:02:12,301 INFO L226 Difference]: Without dead ends: 196 [2020-10-14 18:02:12,302 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=437, Invalid=493, Unknown=0, NotChecked=0, Total=930 [2020-10-14 18:02:12,303 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 196 states. [2020-10-14 18:02:12,308 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 196 to 196. [2020-10-14 18:02:12,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 196 states. [2020-10-14 18:02:12,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 196 states to 196 states and 202 transitions. [2020-10-14 18:02:12,310 INFO L78 Accepts]: Start accepts. Automaton has 196 states and 202 transitions. Word has length 185 [2020-10-14 18:02:12,310 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 18:02:12,310 INFO L479 AbstractCegarLoop]: Abstraction has 196 states and 202 transitions. [2020-10-14 18:02:12,310 INFO L480 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-10-14 18:02:12,311 INFO L276 IsEmpty]: Start isEmpty. Operand 196 states and 202 transitions. [2020-10-14 18:02:12,311 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 192 [2020-10-14 18:02:12,312 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 18:02:12,312 INFO L422 BasicCegarLoop]: trace histogram [28, 28, 28, 28, 28, 28, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 18:02:12,312 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2020-10-14 18:02:12,312 INFO L427 AbstractCegarLoop]: === Iteration 29 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 18:02:12,312 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 18:02:12,313 INFO L82 PathProgramCache]: Analyzing trace with hash -1434912874, now seen corresponding path program 28 times [2020-10-14 18:02:12,313 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 18:02:12,313 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1045181563] [2020-10-14 18:02:12,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 18:02:12,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:02:12,349 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:02:12,457 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:02:12,572 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:02:12,680 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:02:17,339 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:02:17,339 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 199 [2020-10-14 18:02:17,340 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-14 18:02:17,340 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-14 18:02:17,340 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:02:17,340 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:02:17,340 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 30 [2020-10-14 18:02:17,340 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 18:02:17,340 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-14 18:02:17,340 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:02:17,885 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 18:02:17,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:02:17,887 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:02:17,888 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:02:17,888 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 18:02:17,889 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:02:17,889 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 18:02:17,889 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:02:17,890 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:02:17,890 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:02:17,890 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:02:17,891 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:02:17,891 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 18:02:17,934 INFO L134 CoverageAnalysis]: Checked inductivity of 2436 backedges. 0 proven. 406 refuted. 0 times theorem prover too weak. 2030 trivial. 0 not checked. [2020-10-14 18:02:17,935 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1045181563] [2020-10-14 18:02:17,935 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 18:02:17,941 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32] total 32 [2020-10-14 18:02:17,942 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [886448833] [2020-10-14 18:02:17,943 INFO L459 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-10-14 18:02:17,944 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 18:02:17,944 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-10-14 18:02:17,946 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=467, Invalid=525, Unknown=0, NotChecked=0, Total=992 [2020-10-14 18:02:17,946 INFO L87 Difference]: Start difference. First operand 196 states and 202 transitions. Second operand 32 states. [2020-10-14 18:02:18,471 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 18:02:18,471 INFO L93 Difference]: Finished difference Result 363 states and 380 transitions. [2020-10-14 18:02:18,473 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-10-14 18:02:18,473 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 191 [2020-10-14 18:02:18,474 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 18:02:18,475 INFO L225 Difference]: With dead ends: 363 [2020-10-14 18:02:18,475 INFO L226 Difference]: Without dead ends: 202 [2020-10-14 18:02:18,477 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 [2020-10-14 18:02:18,477 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 202 states. [2020-10-14 18:02:18,489 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 202 to 202. [2020-10-14 18:02:18,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 202 states. [2020-10-14 18:02:18,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 202 states to 202 states and 208 transitions. [2020-10-14 18:02:18,496 INFO L78 Accepts]: Start accepts. Automaton has 202 states and 208 transitions. Word has length 191 [2020-10-14 18:02:18,496 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 18:02:18,496 INFO L479 AbstractCegarLoop]: Abstraction has 202 states and 208 transitions. [2020-10-14 18:02:18,496 INFO L480 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-10-14 18:02:18,497 INFO L276 IsEmpty]: Start isEmpty. Operand 202 states and 208 transitions. [2020-10-14 18:02:18,510 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 198 [2020-10-14 18:02:18,510 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 18:02:18,511 INFO L422 BasicCegarLoop]: trace histogram [29, 29, 29, 29, 29, 29, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 18:02:18,511 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2020-10-14 18:02:18,511 INFO L427 AbstractCegarLoop]: === Iteration 30 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 18:02:18,511 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 18:02:18,512 INFO L82 PathProgramCache]: Analyzing trace with hash 476266803, now seen corresponding path program 29 times [2020-10-14 18:02:18,512 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 18:02:18,512 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1716283260] [2020-10-14 18:02:18,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 18:02:18,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:02:18,574 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:02:18,850 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:02:19,118 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:02:19,322 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:02:23,573 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:02:23,573 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 205 [2020-10-14 18:02:23,573 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-14 18:02:23,574 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5020 [2020-10-14 18:02:23,574 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:02:23,574 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:02:23,574 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 31 [2020-10-14 18:02:23,574 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 42 [2020-10-14 18:02:23,574 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 31 [2020-10-14 18:02:23,574 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:02:24,125 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 18:02:24,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:02:24,127 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:02:24,128 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:02:24,128 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 18:02:24,128 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:02:24,129 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 18:02:24,129 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:02:24,129 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:02:24,129 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:02:24,129 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:02:24,129 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:02:24,129 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:02:24,145 INFO L134 CoverageAnalysis]: Checked inductivity of 2610 backedges. 0 proven. 435 refuted. 0 times theorem prover too weak. 2175 trivial. 0 not checked. [2020-10-14 18:02:24,146 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1716283260] [2020-10-14 18:02:24,146 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 18:02:24,146 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33] total 33 [2020-10-14 18:02:24,146 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1409951505] [2020-10-14 18:02:24,147 INFO L459 AbstractCegarLoop]: Interpolant automaton has 33 states [2020-10-14 18:02:24,147 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 18:02:24,147 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2020-10-14 18:02:24,147 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=498, Invalid=558, Unknown=0, NotChecked=0, Total=1056 [2020-10-14 18:02:24,147 INFO L87 Difference]: Start difference. First operand 202 states and 208 transitions. Second operand 33 states. [2020-10-14 18:02:24,752 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 18:02:24,752 INFO L93 Difference]: Finished difference Result 374 states and 391 transitions. [2020-10-14 18:02:24,753 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-10-14 18:02:24,753 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 197 [2020-10-14 18:02:24,753 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 18:02:24,754 INFO L225 Difference]: With dead ends: 374 [2020-10-14 18:02:24,754 INFO L226 Difference]: Without dead ends: 208 [2020-10-14 18:02:24,755 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 [2020-10-14 18:02:24,756 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 208 states. [2020-10-14 18:02:24,762 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 208 to 208. [2020-10-14 18:02:24,762 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 208 states. [2020-10-14 18:02:24,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 208 states to 208 states and 214 transitions. [2020-10-14 18:02:24,764 INFO L78 Accepts]: Start accepts. Automaton has 208 states and 214 transitions. Word has length 197 [2020-10-14 18:02:24,764 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 18:02:24,764 INFO L479 AbstractCegarLoop]: Abstraction has 208 states and 214 transitions. [2020-10-14 18:02:24,764 INFO L480 AbstractCegarLoop]: Interpolant automaton has 33 states. [2020-10-14 18:02:24,764 INFO L276 IsEmpty]: Start isEmpty. Operand 208 states and 214 transitions. [2020-10-14 18:02:24,766 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 204 [2020-10-14 18:02:24,766 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 18:02:24,766 INFO L422 BasicCegarLoop]: trace histogram [30, 30, 30, 30, 30, 30, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 18:02:24,766 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2020-10-14 18:02:24,766 INFO L427 AbstractCegarLoop]: === Iteration 31 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 18:02:24,767 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 18:02:24,767 INFO L82 PathProgramCache]: Analyzing trace with hash -20613834, now seen corresponding path program 30 times [2020-10-14 18:02:24,767 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 18:02:24,767 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1751344816] [2020-10-14 18:02:24,767 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 18:02:24,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:02:24,813 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:02:25,006 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:02:25,194 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:02:25,315 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:02:29,810 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:02:29,811 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 211 [2020-10-14 18:02:29,811 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-14 18:02:29,811 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5012 [2020-10-14 18:02:29,811 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:02:29,811 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:02:29,812 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 32 [2020-10-14 18:02:29,812 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 75 [2020-10-14 18:02:29,812 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-14 18:02:29,812 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:02:30,428 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 18:02:30,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:02:30,431 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:02:30,432 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:02:30,433 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 18:02:30,433 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:02:30,433 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 18:02:30,433 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:02:30,433 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:02:30,434 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:02:30,434 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:02:30,434 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:02:30,434 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:02:30,451 INFO L134 CoverageAnalysis]: Checked inductivity of 2790 backedges. 0 proven. 465 refuted. 0 times theorem prover too weak. 2325 trivial. 0 not checked. [2020-10-14 18:02:30,451 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1751344816] [2020-10-14 18:02:30,451 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 18:02:30,452 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34] total 34 [2020-10-14 18:02:30,452 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1008121940] [2020-10-14 18:02:30,452 INFO L459 AbstractCegarLoop]: Interpolant automaton has 34 states [2020-10-14 18:02:30,452 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 18:02:30,453 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2020-10-14 18:02:30,453 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=530, Invalid=592, Unknown=0, NotChecked=0, Total=1122 [2020-10-14 18:02:30,454 INFO L87 Difference]: Start difference. First operand 208 states and 214 transitions. Second operand 34 states. [2020-10-14 18:02:30,972 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 18:02:30,973 INFO L93 Difference]: Finished difference Result 385 states and 402 transitions. [2020-10-14 18:02:30,973 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-10-14 18:02:30,973 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 203 [2020-10-14 18:02:30,973 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 18:02:30,975 INFO L225 Difference]: With dead ends: 385 [2020-10-14 18:02:30,975 INFO L226 Difference]: Without dead ends: 214 [2020-10-14 18:02:30,976 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=530, Invalid=592, Unknown=0, NotChecked=0, Total=1122 [2020-10-14 18:02:30,976 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 214 states. [2020-10-14 18:02:30,983 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 214 to 214. [2020-10-14 18:02:30,983 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 214 states. [2020-10-14 18:02:30,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 214 states to 214 states and 220 transitions. [2020-10-14 18:02:30,984 INFO L78 Accepts]: Start accepts. Automaton has 214 states and 220 transitions. Word has length 203 [2020-10-14 18:02:30,985 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 18:02:30,985 INFO L479 AbstractCegarLoop]: Abstraction has 214 states and 220 transitions. [2020-10-14 18:02:30,985 INFO L480 AbstractCegarLoop]: Interpolant automaton has 34 states. [2020-10-14 18:02:30,985 INFO L276 IsEmpty]: Start isEmpty. Operand 214 states and 220 transitions. [2020-10-14 18:02:30,986 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 210 [2020-10-14 18:02:30,986 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 18:02:30,986 INFO L422 BasicCegarLoop]: trace histogram [31, 31, 31, 31, 31, 31, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 18:02:30,986 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2020-10-14 18:02:30,987 INFO L427 AbstractCegarLoop]: === Iteration 32 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 18:02:30,987 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 18:02:30,987 INFO L82 PathProgramCache]: Analyzing trace with hash -1576162029, now seen corresponding path program 31 times [2020-10-14 18:02:30,987 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 18:02:30,988 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [665287796] [2020-10-14 18:02:30,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 18:02:31,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:02:31,027 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:02:31,175 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:02:31,333 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:02:31,523 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:02:36,050 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:02:36,050 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 217 [2020-10-14 18:02:36,050 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-14 18:02:36,050 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5037 [2020-10-14 18:02:36,050 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:02:36,050 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:02:36,051 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 33 [2020-10-14 18:02:36,051 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 18:02:36,051 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 33 [2020-10-14 18:02:36,051 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:02:36,776 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 18:02:36,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:02:36,783 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:02:36,784 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:02:36,784 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 18:02:36,784 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:02:36,785 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-14 18:02:36,785 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:02:36,785 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:02:36,785 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:02:36,785 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:02:36,786 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:02:36,786 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:02:36,819 INFO L134 CoverageAnalysis]: Checked inductivity of 2976 backedges. 0 proven. 496 refuted. 0 times theorem prover too weak. 2480 trivial. 0 not checked. [2020-10-14 18:02:36,819 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [665287796] [2020-10-14 18:02:36,820 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 18:02:36,820 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35] total 35 [2020-10-14 18:02:36,820 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1518866843] [2020-10-14 18:02:36,821 INFO L459 AbstractCegarLoop]: Interpolant automaton has 35 states [2020-10-14 18:02:36,821 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 18:02:36,821 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2020-10-14 18:02:36,822 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=563, Invalid=627, Unknown=0, NotChecked=0, Total=1190 [2020-10-14 18:02:36,822 INFO L87 Difference]: Start difference. First operand 214 states and 220 transitions. Second operand 35 states. [2020-10-14 18:02:37,352 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 18:02:37,353 INFO L93 Difference]: Finished difference Result 396 states and 413 transitions. [2020-10-14 18:02:37,354 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-10-14 18:02:37,354 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 209 [2020-10-14 18:02:37,354 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 18:02:37,356 INFO L225 Difference]: With dead ends: 396 [2020-10-14 18:02:37,356 INFO L226 Difference]: Without dead ends: 220 [2020-10-14 18:02:37,357 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=563, Invalid=627, Unknown=0, NotChecked=0, Total=1190 [2020-10-14 18:02:37,358 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 220 states. [2020-10-14 18:02:37,364 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 220 to 220. [2020-10-14 18:02:37,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 220 states. [2020-10-14 18:02:37,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 220 states to 220 states and 226 transitions. [2020-10-14 18:02:37,365 INFO L78 Accepts]: Start accepts. Automaton has 220 states and 226 transitions. Word has length 209 [2020-10-14 18:02:37,366 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 18:02:37,366 INFO L479 AbstractCegarLoop]: Abstraction has 220 states and 226 transitions. [2020-10-14 18:02:37,366 INFO L480 AbstractCegarLoop]: Interpolant automaton has 35 states. [2020-10-14 18:02:37,366 INFO L276 IsEmpty]: Start isEmpty. Operand 220 states and 226 transitions. [2020-10-14 18:02:37,367 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 216 [2020-10-14 18:02:37,367 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 18:02:37,367 INFO L422 BasicCegarLoop]: trace histogram [32, 32, 32, 32, 32, 32, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 18:02:37,368 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2020-10-14 18:02:37,368 INFO L427 AbstractCegarLoop]: === Iteration 33 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 18:02:37,368 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 18:02:37,368 INFO L82 PathProgramCache]: Analyzing trace with hash 1331686102, now seen corresponding path program 32 times [2020-10-14 18:02:37,369 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 18:02:37,369 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [19436097] [2020-10-14 18:02:37,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 18:02:37,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:02:37,409 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:02:37,587 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:02:37,715 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:02:37,853 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:02:42,423 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:02:42,424 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 223 [2020-10-14 18:02:42,424 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-14 18:02:42,424 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5029 [2020-10-14 18:02:42,424 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:02:42,424 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:02:42,424 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 34 [2020-10-14 18:02:42,424 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 113 [2020-10-14 18:02:42,424 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 34 [2020-10-14 18:02:42,425 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:02:43,073 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 18:02:43,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:02:43,075 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:02:43,076 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:02:43,076 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 18:02:43,076 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:02:43,076 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 18:02:43,077 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:02:43,077 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:02:43,077 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:02:43,077 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:02:43,077 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:02:43,077 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:02:43,098 INFO L134 CoverageAnalysis]: Checked inductivity of 3168 backedges. 0 proven. 528 refuted. 0 times theorem prover too weak. 2640 trivial. 0 not checked. [2020-10-14 18:02:43,098 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [19436097] [2020-10-14 18:02:43,098 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 18:02:43,098 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36] total 36 [2020-10-14 18:02:43,099 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1622125552] [2020-10-14 18:02:43,099 INFO L459 AbstractCegarLoop]: Interpolant automaton has 36 states [2020-10-14 18:02:43,099 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 18:02:43,099 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2020-10-14 18:02:43,100 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=597, Invalid=663, Unknown=0, NotChecked=0, Total=1260 [2020-10-14 18:02:43,100 INFO L87 Difference]: Start difference. First operand 220 states and 226 transitions. Second operand 36 states. [2020-10-14 18:02:43,641 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 18:02:43,642 INFO L93 Difference]: Finished difference Result 407 states and 424 transitions. [2020-10-14 18:02:43,642 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-10-14 18:02:43,642 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 215 [2020-10-14 18:02:43,643 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 18:02:43,644 INFO L225 Difference]: With dead ends: 407 [2020-10-14 18:02:43,644 INFO L226 Difference]: Without dead ends: 226 [2020-10-14 18:02:43,645 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=597, Invalid=663, Unknown=0, NotChecked=0, Total=1260 [2020-10-14 18:02:43,646 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 226 states. [2020-10-14 18:02:43,658 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 226 to 226. [2020-10-14 18:02:43,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 226 states. [2020-10-14 18:02:43,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 226 states to 226 states and 232 transitions. [2020-10-14 18:02:43,662 INFO L78 Accepts]: Start accepts. Automaton has 226 states and 232 transitions. Word has length 215 [2020-10-14 18:02:43,662 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 18:02:43,662 INFO L479 AbstractCegarLoop]: Abstraction has 226 states and 232 transitions. [2020-10-14 18:02:43,663 INFO L480 AbstractCegarLoop]: Interpolant automaton has 36 states. [2020-10-14 18:02:43,663 INFO L276 IsEmpty]: Start isEmpty. Operand 226 states and 232 transitions. [2020-10-14 18:02:43,665 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 222 [2020-10-14 18:02:43,665 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 18:02:43,665 INFO L422 BasicCegarLoop]: trace histogram [33, 33, 33, 33, 33, 33, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 18:02:43,666 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2020-10-14 18:02:43,666 INFO L427 AbstractCegarLoop]: === Iteration 34 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 18:02:43,666 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 18:02:43,666 INFO L82 PathProgramCache]: Analyzing trace with hash -858922765, now seen corresponding path program 33 times [2020-10-14 18:02:43,666 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 18:02:43,667 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [284776932] [2020-10-14 18:02:43,667 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 18:02:43,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:02:43,719 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:02:43,909 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:02:44,092 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:02:44,283 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:02:48,743 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:02:48,743 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 229 [2020-10-14 18:02:48,743 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-14 18:02:48,744 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5043 [2020-10-14 18:02:48,744 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:02:48,744 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:02:48,744 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 35 [2020-10-14 18:02:48,744 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 46 [2020-10-14 18:02:48,744 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 35 [2020-10-14 18:02:48,744 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:02:49,424 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 18:02:49,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:02:49,426 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:02:49,427 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:02:49,427 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 18:02:49,427 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:02:49,428 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 18:02:49,428 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:02:49,428 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:02:49,428 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:02:49,428 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:02:49,428 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:02:49,429 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:02:49,453 INFO L134 CoverageAnalysis]: Checked inductivity of 3366 backedges. 0 proven. 561 refuted. 0 times theorem prover too weak. 2805 trivial. 0 not checked. [2020-10-14 18:02:49,454 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [284776932] [2020-10-14 18:02:49,454 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 18:02:49,454 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37] total 37 [2020-10-14 18:02:49,454 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [162812169] [2020-10-14 18:02:49,455 INFO L459 AbstractCegarLoop]: Interpolant automaton has 37 states [2020-10-14 18:02:49,455 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 18:02:49,455 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2020-10-14 18:02:49,455 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=632, Invalid=700, Unknown=0, NotChecked=0, Total=1332 [2020-10-14 18:02:49,456 INFO L87 Difference]: Start difference. First operand 226 states and 232 transitions. Second operand 37 states. [2020-10-14 18:02:50,003 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 18:02:50,004 INFO L93 Difference]: Finished difference Result 418 states and 435 transitions. [2020-10-14 18:02:50,004 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-10-14 18:02:50,004 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 221 [2020-10-14 18:02:50,004 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 18:02:50,006 INFO L225 Difference]: With dead ends: 418 [2020-10-14 18:02:50,006 INFO L226 Difference]: Without dead ends: 232 [2020-10-14 18:02:50,008 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=632, Invalid=700, Unknown=0, NotChecked=0, Total=1332 [2020-10-14 18:02:50,008 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 232 states. [2020-10-14 18:02:50,013 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 232 to 232. [2020-10-14 18:02:50,013 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 232 states. [2020-10-14 18:02:50,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 232 states to 232 states and 238 transitions. [2020-10-14 18:02:50,014 INFO L78 Accepts]: Start accepts. Automaton has 232 states and 238 transitions. Word has length 221 [2020-10-14 18:02:50,015 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 18:02:50,015 INFO L479 AbstractCegarLoop]: Abstraction has 232 states and 238 transitions. [2020-10-14 18:02:50,015 INFO L480 AbstractCegarLoop]: Interpolant automaton has 37 states. [2020-10-14 18:02:50,015 INFO L276 IsEmpty]: Start isEmpty. Operand 232 states and 238 transitions. [2020-10-14 18:02:50,016 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 228 [2020-10-14 18:02:50,016 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 18:02:50,017 INFO L422 BasicCegarLoop]: trace histogram [34, 34, 34, 34, 34, 34, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 18:02:50,017 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2020-10-14 18:02:50,017 INFO L427 AbstractCegarLoop]: === Iteration 35 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 18:02:50,017 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 18:02:50,017 INFO L82 PathProgramCache]: Analyzing trace with hash -1218029450, now seen corresponding path program 34 times [2020-10-14 18:02:50,018 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 18:02:50,018 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [648353498] [2020-10-14 18:02:50,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 18:02:50,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:02:50,058 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:02:50,224 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:02:50,382 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:02:50,537 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:02:55,058 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:02:55,058 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 235 [2020-10-14 18:02:55,058 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-14 18:02:55,058 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5015 [2020-10-14 18:02:55,058 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:02:55,059 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:02:55,059 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 36 [2020-10-14 18:02:55,059 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 47 [2020-10-14 18:02:55,059 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 36 [2020-10-14 18:02:55,059 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:02:55,787 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 18:02:55,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:02:55,789 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:02:55,790 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:02:55,790 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 18:02:55,791 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:02:55,791 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 18:02:55,791 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:02:55,791 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:02:55,791 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:02:55,792 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:02:55,792 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:02:55,792 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:02:55,812 INFO L134 CoverageAnalysis]: Checked inductivity of 3570 backedges. 0 proven. 595 refuted. 0 times theorem prover too weak. 2975 trivial. 0 not checked. [2020-10-14 18:02:55,813 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [648353498] [2020-10-14 18:02:55,813 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 18:02:55,813 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38] total 38 [2020-10-14 18:02:55,813 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [991726011] [2020-10-14 18:02:55,813 INFO L459 AbstractCegarLoop]: Interpolant automaton has 38 states [2020-10-14 18:02:55,814 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 18:02:55,814 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2020-10-14 18:02:55,814 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=668, Invalid=738, Unknown=0, NotChecked=0, Total=1406 [2020-10-14 18:02:55,814 INFO L87 Difference]: Start difference. First operand 232 states and 238 transitions. Second operand 38 states. [2020-10-14 18:02:56,462 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 18:02:56,462 INFO L93 Difference]: Finished difference Result 429 states and 446 transitions. [2020-10-14 18:02:56,462 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-10-14 18:02:56,463 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 227 [2020-10-14 18:02:56,463 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 18:02:56,464 INFO L225 Difference]: With dead ends: 429 [2020-10-14 18:02:56,464 INFO L226 Difference]: Without dead ends: 238 [2020-10-14 18:02:56,466 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=668, Invalid=738, Unknown=0, NotChecked=0, Total=1406 [2020-10-14 18:02:56,466 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 238 states. [2020-10-14 18:02:56,471 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 238 to 238. [2020-10-14 18:02:56,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 238 states. [2020-10-14 18:02:56,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 238 states to 238 states and 244 transitions. [2020-10-14 18:02:56,473 INFO L78 Accepts]: Start accepts. Automaton has 238 states and 244 transitions. Word has length 227 [2020-10-14 18:02:56,473 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 18:02:56,473 INFO L479 AbstractCegarLoop]: Abstraction has 238 states and 244 transitions. [2020-10-14 18:02:56,473 INFO L480 AbstractCegarLoop]: Interpolant automaton has 38 states. [2020-10-14 18:02:56,473 INFO L276 IsEmpty]: Start isEmpty. Operand 238 states and 244 transitions. [2020-10-14 18:02:56,474 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 234 [2020-10-14 18:02:56,474 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 18:02:56,475 INFO L422 BasicCegarLoop]: trace histogram [35, 35, 35, 35, 35, 35, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 18:02:56,475 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2020-10-14 18:02:56,475 INFO L427 AbstractCegarLoop]: === Iteration 36 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 18:02:56,475 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 18:02:56,475 INFO L82 PathProgramCache]: Analyzing trace with hash 392551635, now seen corresponding path program 35 times [2020-10-14 18:02:56,476 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 18:02:56,476 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1742882759] [2020-10-14 18:02:56,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 18:02:56,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:02:56,520 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:02:56,674 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:02:56,845 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:02:57,007 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:03:01,540 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:03:01,540 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 241 [2020-10-14 18:03:01,540 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-14 18:03:01,540 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5030 [2020-10-14 18:03:01,541 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:03:01,541 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:03:01,541 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 37 [2020-10-14 18:03:01,541 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 85 [2020-10-14 18:03:01,541 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 37 [2020-10-14 18:03:01,541 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:03:02,311 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 18:03:02,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:03:02,313 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:03:02,314 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:03:02,314 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 18:03:02,314 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:03:02,314 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 18:03:02,315 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:03:02,315 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:03:02,315 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:03:02,315 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:03:02,315 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:03:02,315 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:03:02,337 INFO L134 CoverageAnalysis]: Checked inductivity of 3780 backedges. 0 proven. 630 refuted. 0 times theorem prover too weak. 3150 trivial. 0 not checked. [2020-10-14 18:03:02,337 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1742882759] [2020-10-14 18:03:02,337 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 18:03:02,337 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39] total 39 [2020-10-14 18:03:02,337 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1375534439] [2020-10-14 18:03:02,338 INFO L459 AbstractCegarLoop]: Interpolant automaton has 39 states [2020-10-14 18:03:02,338 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 18:03:02,338 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2020-10-14 18:03:02,339 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=705, Invalid=777, Unknown=0, NotChecked=0, Total=1482 [2020-10-14 18:03:02,339 INFO L87 Difference]: Start difference. First operand 238 states and 244 transitions. Second operand 39 states. [2020-10-14 18:03:02,938 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 18:03:02,939 INFO L93 Difference]: Finished difference Result 440 states and 457 transitions. [2020-10-14 18:03:02,939 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-10-14 18:03:02,939 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 233 [2020-10-14 18:03:02,940 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 18:03:02,941 INFO L225 Difference]: With dead ends: 440 [2020-10-14 18:03:02,941 INFO L226 Difference]: Without dead ends: 244 [2020-10-14 18:03:02,943 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=705, Invalid=777, Unknown=0, NotChecked=0, Total=1482 [2020-10-14 18:03:02,943 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 244 states. [2020-10-14 18:03:02,949 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 244 to 244. [2020-10-14 18:03:02,949 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 244 states. [2020-10-14 18:03:02,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 244 states to 244 states and 250 transitions. [2020-10-14 18:03:02,950 INFO L78 Accepts]: Start accepts. Automaton has 244 states and 250 transitions. Word has length 233 [2020-10-14 18:03:02,950 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 18:03:02,950 INFO L479 AbstractCegarLoop]: Abstraction has 244 states and 250 transitions. [2020-10-14 18:03:02,951 INFO L480 AbstractCegarLoop]: Interpolant automaton has 39 states. [2020-10-14 18:03:02,951 INFO L276 IsEmpty]: Start isEmpty. Operand 244 states and 250 transitions. [2020-10-14 18:03:02,952 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 240 [2020-10-14 18:03:02,952 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 18:03:02,952 INFO L422 BasicCegarLoop]: trace histogram [36, 36, 36, 36, 36, 36, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 18:03:02,952 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2020-10-14 18:03:02,953 INFO L427 AbstractCegarLoop]: === Iteration 37 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 18:03:02,953 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 18:03:02,953 INFO L82 PathProgramCache]: Analyzing trace with hash -1284063722, now seen corresponding path program 36 times [2020-10-14 18:03:02,953 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 18:03:02,953 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2060362670] [2020-10-14 18:03:02,954 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 18:03:02,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:03:02,998 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:03:03,269 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:03:03,503 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:03:03,673 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:03:07,992 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:03:07,992 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 247 [2020-10-14 18:03:07,992 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-14 18:03:07,992 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5010 [2020-10-14 18:03:07,992 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:03:07,993 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:03:07,993 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 38 [2020-10-14 18:03:07,993 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 125 [2020-10-14 18:03:07,993 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 38 [2020-10-14 18:03:07,993 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:03:08,817 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 18:03:08,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:03:08,820 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:03:08,821 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:03:08,821 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 18:03:08,821 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:03:08,822 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 18:03:08,822 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:03:08,822 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:03:08,822 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:03:08,822 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:03:08,822 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:03:08,822 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:03:08,846 INFO L134 CoverageAnalysis]: Checked inductivity of 3996 backedges. 0 proven. 666 refuted. 0 times theorem prover too weak. 3330 trivial. 0 not checked. [2020-10-14 18:03:08,846 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2060362670] [2020-10-14 18:03:08,846 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 18:03:08,846 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40] total 40 [2020-10-14 18:03:08,847 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1489388173] [2020-10-14 18:03:08,847 INFO L459 AbstractCegarLoop]: Interpolant automaton has 40 states [2020-10-14 18:03:08,847 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 18:03:08,848 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2020-10-14 18:03:08,848 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=743, Invalid=817, Unknown=0, NotChecked=0, Total=1560 [2020-10-14 18:03:08,849 INFO L87 Difference]: Start difference. First operand 244 states and 250 transitions. Second operand 40 states. [2020-10-14 18:03:09,513 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 18:03:09,514 INFO L93 Difference]: Finished difference Result 451 states and 468 transitions. [2020-10-14 18:03:09,521 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-10-14 18:03:09,521 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 239 [2020-10-14 18:03:09,521 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 18:03:09,522 INFO L225 Difference]: With dead ends: 451 [2020-10-14 18:03:09,523 INFO L226 Difference]: Without dead ends: 250 [2020-10-14 18:03:09,524 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=743, Invalid=817, Unknown=0, NotChecked=0, Total=1560 [2020-10-14 18:03:09,524 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 250 states. [2020-10-14 18:03:09,530 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 250 to 250. [2020-10-14 18:03:09,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 250 states. [2020-10-14 18:03:09,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 250 states to 250 states and 256 transitions. [2020-10-14 18:03:09,532 INFO L78 Accepts]: Start accepts. Automaton has 250 states and 256 transitions. Word has length 239 [2020-10-14 18:03:09,532 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 18:03:09,532 INFO L479 AbstractCegarLoop]: Abstraction has 250 states and 256 transitions. [2020-10-14 18:03:09,532 INFO L480 AbstractCegarLoop]: Interpolant automaton has 40 states. [2020-10-14 18:03:09,532 INFO L276 IsEmpty]: Start isEmpty. Operand 250 states and 256 transitions. [2020-10-14 18:03:09,534 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 246 [2020-10-14 18:03:09,534 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 18:03:09,534 INFO L422 BasicCegarLoop]: trace histogram [37, 37, 37, 37, 37, 37, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 18:03:09,534 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2020-10-14 18:03:09,534 INFO L427 AbstractCegarLoop]: === Iteration 38 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 18:03:09,535 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 18:03:09,535 INFO L82 PathProgramCache]: Analyzing trace with hash -1692950349, now seen corresponding path program 37 times [2020-10-14 18:03:09,535 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 18:03:09,535 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2024661817] [2020-10-14 18:03:09,535 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 18:03:09,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:03:09,573 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:03:09,727 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:03:09,929 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:03:10,119 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:03:14,610 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:03:14,611 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 253 [2020-10-14 18:03:14,611 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-14 18:03:14,611 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5049 [2020-10-14 18:03:14,611 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:03:14,611 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:03:14,611 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 39 [2020-10-14 18:03:14,611 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 18:03:14,612 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 39 [2020-10-14 18:03:14,612 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:03:15,462 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 18:03:15,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:03:15,464 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:03:15,465 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:03:15,465 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 18:03:15,466 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:03:15,466 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 18:03:15,466 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:03:15,466 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:03:15,466 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:03:15,467 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:03:15,467 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:03:15,467 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:03:15,490 INFO L134 CoverageAnalysis]: Checked inductivity of 4218 backedges. 0 proven. 703 refuted. 0 times theorem prover too weak. 3515 trivial. 0 not checked. [2020-10-14 18:03:15,491 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2024661817] [2020-10-14 18:03:15,491 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 18:03:15,491 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41] total 41 [2020-10-14 18:03:15,491 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [878678882] [2020-10-14 18:03:15,491 INFO L459 AbstractCegarLoop]: Interpolant automaton has 41 states [2020-10-14 18:03:15,492 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 18:03:15,492 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2020-10-14 18:03:15,493 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=782, Invalid=858, Unknown=0, NotChecked=0, Total=1640 [2020-10-14 18:03:15,493 INFO L87 Difference]: Start difference. First operand 250 states and 256 transitions. Second operand 41 states. [2020-10-14 18:03:16,173 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 18:03:16,174 INFO L93 Difference]: Finished difference Result 462 states and 479 transitions. [2020-10-14 18:03:16,174 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2020-10-14 18:03:16,174 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 245 [2020-10-14 18:03:16,175 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 18:03:16,176 INFO L225 Difference]: With dead ends: 462 [2020-10-14 18:03:16,177 INFO L226 Difference]: Without dead ends: 256 [2020-10-14 18:03:16,179 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=782, Invalid=858, Unknown=0, NotChecked=0, Total=1640 [2020-10-14 18:03:16,179 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 256 states. [2020-10-14 18:03:16,184 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 256 to 256. [2020-10-14 18:03:16,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 256 states. [2020-10-14 18:03:16,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 256 states to 256 states and 262 transitions. [2020-10-14 18:03:16,185 INFO L78 Accepts]: Start accepts. Automaton has 256 states and 262 transitions. Word has length 245 [2020-10-14 18:03:16,186 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 18:03:16,186 INFO L479 AbstractCegarLoop]: Abstraction has 256 states and 262 transitions. [2020-10-14 18:03:16,186 INFO L480 AbstractCegarLoop]: Interpolant automaton has 41 states. [2020-10-14 18:03:16,186 INFO L276 IsEmpty]: Start isEmpty. Operand 256 states and 262 transitions. [2020-10-14 18:03:16,187 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 252 [2020-10-14 18:03:16,187 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 18:03:16,187 INFO L422 BasicCegarLoop]: trace histogram [38, 38, 38, 38, 38, 38, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 18:03:16,188 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2020-10-14 18:03:16,188 INFO L427 AbstractCegarLoop]: === Iteration 39 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 18:03:16,188 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 18:03:16,188 INFO L82 PathProgramCache]: Analyzing trace with hash 28253110, now seen corresponding path program 38 times [2020-10-14 18:03:16,188 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 18:03:16,188 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1397517273] [2020-10-14 18:03:16,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 18:03:16,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:03:16,223 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:03:16,408 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:03:16,609 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:03:16,831 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:03:21,237 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:03:21,237 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 259 [2020-10-14 18:03:21,237 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-14 18:03:21,237 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5025 [2020-10-14 18:03:21,237 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:03:21,237 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:03:21,238 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 40 [2020-10-14 18:03:21,238 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 18:03:21,238 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 40 [2020-10-14 18:03:21,238 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:03:22,150 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 18:03:22,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:03:22,152 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:03:22,153 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:03:22,153 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 18:03:22,153 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:03:22,154 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 18:03:22,154 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:03:22,154 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:03:22,154 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:03:22,154 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:03:22,154 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:03:22,154 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:03:22,179 INFO L134 CoverageAnalysis]: Checked inductivity of 4446 backedges. 0 proven. 741 refuted. 0 times theorem prover too weak. 3705 trivial. 0 not checked. [2020-10-14 18:03:22,179 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1397517273] [2020-10-14 18:03:22,179 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 18:03:22,179 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42] total 42 [2020-10-14 18:03:22,180 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1831015965] [2020-10-14 18:03:22,180 INFO L459 AbstractCegarLoop]: Interpolant automaton has 42 states [2020-10-14 18:03:22,180 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 18:03:22,180 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2020-10-14 18:03:22,181 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=822, Invalid=900, Unknown=0, NotChecked=0, Total=1722 [2020-10-14 18:03:22,181 INFO L87 Difference]: Start difference. First operand 256 states and 262 transitions. Second operand 42 states. [2020-10-14 18:03:22,782 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 18:03:22,782 INFO L93 Difference]: Finished difference Result 473 states and 490 transitions. [2020-10-14 18:03:22,783 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2020-10-14 18:03:22,783 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 251 [2020-10-14 18:03:22,783 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 18:03:22,785 INFO L225 Difference]: With dead ends: 473 [2020-10-14 18:03:22,785 INFO L226 Difference]: Without dead ends: 262 [2020-10-14 18:03:22,787 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=822, Invalid=900, Unknown=0, NotChecked=0, Total=1722 [2020-10-14 18:03:22,788 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 262 states. [2020-10-14 18:03:22,793 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 262 to 262. [2020-10-14 18:03:22,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 262 states. [2020-10-14 18:03:22,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 262 states to 262 states and 268 transitions. [2020-10-14 18:03:22,794 INFO L78 Accepts]: Start accepts. Automaton has 262 states and 268 transitions. Word has length 251 [2020-10-14 18:03:22,794 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 18:03:22,795 INFO L479 AbstractCegarLoop]: Abstraction has 262 states and 268 transitions. [2020-10-14 18:03:22,795 INFO L480 AbstractCegarLoop]: Interpolant automaton has 42 states. [2020-10-14 18:03:22,795 INFO L276 IsEmpty]: Start isEmpty. Operand 262 states and 268 transitions. [2020-10-14 18:03:22,796 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 258 [2020-10-14 18:03:22,796 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 18:03:22,796 INFO L422 BasicCegarLoop]: trace histogram [39, 39, 39, 39, 39, 39, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 18:03:22,797 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2020-10-14 18:03:22,797 INFO L427 AbstractCegarLoop]: === Iteration 40 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 18:03:22,797 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 18:03:22,797 INFO L82 PathProgramCache]: Analyzing trace with hash 799354003, now seen corresponding path program 39 times [2020-10-14 18:03:22,797 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 18:03:22,797 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1918141181] [2020-10-14 18:03:22,798 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 18:03:22,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:03:22,838 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:03:23,034 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:03:23,240 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:03:23,439 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:03:27,864 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:03:27,864 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 265 [2020-10-14 18:03:27,865 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-14 18:03:27,865 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5040 [2020-10-14 18:03:27,865 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:03:27,865 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:03:27,865 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 41 [2020-10-14 18:03:27,865 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 52 [2020-10-14 18:03:27,865 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 41 [2020-10-14 18:03:27,866 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:03:28,841 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 18:03:28,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:03:28,844 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:03:28,845 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:03:28,845 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 18:03:28,845 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:03:28,845 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 18:03:28,845 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:03:28,846 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:03:28,846 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:03:28,846 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:03:28,846 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:03:28,846 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:03:28,872 INFO L134 CoverageAnalysis]: Checked inductivity of 4680 backedges. 0 proven. 780 refuted. 0 times theorem prover too weak. 3900 trivial. 0 not checked. [2020-10-14 18:03:28,872 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1918141181] [2020-10-14 18:03:28,872 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 18:03:28,872 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43] total 43 [2020-10-14 18:03:28,873 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1620331857] [2020-10-14 18:03:28,873 INFO L459 AbstractCegarLoop]: Interpolant automaton has 43 states [2020-10-14 18:03:28,873 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 18:03:28,874 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2020-10-14 18:03:28,874 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=863, Invalid=943, Unknown=0, NotChecked=0, Total=1806 [2020-10-14 18:03:28,874 INFO L87 Difference]: Start difference. First operand 262 states and 268 transitions. Second operand 43 states. [2020-10-14 18:03:29,482 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 18:03:29,483 INFO L93 Difference]: Finished difference Result 484 states and 501 transitions. [2020-10-14 18:03:29,483 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2020-10-14 18:03:29,483 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 257 [2020-10-14 18:03:29,484 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 18:03:29,486 INFO L225 Difference]: With dead ends: 484 [2020-10-14 18:03:29,486 INFO L226 Difference]: Without dead ends: 268 [2020-10-14 18:03:29,487 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=863, Invalid=943, Unknown=0, NotChecked=0, Total=1806 [2020-10-14 18:03:29,488 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 268 states. [2020-10-14 18:03:29,494 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 268 to 268. [2020-10-14 18:03:29,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 268 states. [2020-10-14 18:03:29,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 268 states to 268 states and 274 transitions. [2020-10-14 18:03:29,495 INFO L78 Accepts]: Start accepts. Automaton has 268 states and 274 transitions. Word has length 257 [2020-10-14 18:03:29,495 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 18:03:29,495 INFO L479 AbstractCegarLoop]: Abstraction has 268 states and 274 transitions. [2020-10-14 18:03:29,496 INFO L480 AbstractCegarLoop]: Interpolant automaton has 43 states. [2020-10-14 18:03:29,496 INFO L276 IsEmpty]: Start isEmpty. Operand 268 states and 274 transitions. [2020-10-14 18:03:29,497 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 264 [2020-10-14 18:03:29,497 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 18:03:29,498 INFO L422 BasicCegarLoop]: trace histogram [40, 40, 40, 40, 40, 40, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 18:03:29,498 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2020-10-14 18:03:29,498 INFO L427 AbstractCegarLoop]: === Iteration 41 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 18:03:29,498 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 18:03:29,498 INFO L82 PathProgramCache]: Analyzing trace with hash -2119339690, now seen corresponding path program 40 times [2020-10-14 18:03:29,499 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 18:03:29,499 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1527144920] [2020-10-14 18:03:29,499 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 18:03:29,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:03:29,547 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:03:29,891 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:03:30,182 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:03:30,402 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:03:34,537 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:03:34,537 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 271 [2020-10-14 18:03:34,538 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-14 18:03:34,538 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5008 [2020-10-14 18:03:34,538 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:03:34,538 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:03:34,538 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 42 [2020-10-14 18:03:34,538 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 137 [2020-10-14 18:03:34,538 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 42 [2020-10-14 18:03:34,538 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:03:35,492 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 18:03:35,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:03:35,494 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:03:35,496 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:03:35,496 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 18:03:35,496 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:03:35,497 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-14 18:03:35,497 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:03:35,497 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:03:35,497 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:03:35,497 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:03:35,497 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:03:35,498 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:03:35,536 INFO L134 CoverageAnalysis]: Checked inductivity of 4920 backedges. 0 proven. 820 refuted. 0 times theorem prover too weak. 4100 trivial. 0 not checked. [2020-10-14 18:03:35,536 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1527144920] [2020-10-14 18:03:35,536 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 18:03:35,537 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [44] total 44 [2020-10-14 18:03:35,537 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1739199190] [2020-10-14 18:03:35,537 INFO L459 AbstractCegarLoop]: Interpolant automaton has 44 states [2020-10-14 18:03:35,537 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 18:03:35,538 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2020-10-14 18:03:35,539 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=905, Invalid=987, Unknown=0, NotChecked=0, Total=1892 [2020-10-14 18:03:35,539 INFO L87 Difference]: Start difference. First operand 268 states and 274 transitions. Second operand 44 states. [2020-10-14 18:03:36,273 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 18:03:36,273 INFO L93 Difference]: Finished difference Result 495 states and 512 transitions. [2020-10-14 18:03:36,274 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2020-10-14 18:03:36,274 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 263 [2020-10-14 18:03:36,274 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 18:03:36,276 INFO L225 Difference]: With dead ends: 495 [2020-10-14 18:03:36,276 INFO L226 Difference]: Without dead ends: 274 [2020-10-14 18:03:36,278 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=905, Invalid=987, Unknown=0, NotChecked=0, Total=1892 [2020-10-14 18:03:36,278 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 274 states. [2020-10-14 18:03:36,283 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 274 to 274. [2020-10-14 18:03:36,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 274 states. [2020-10-14 18:03:36,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 274 states to 274 states and 280 transitions. [2020-10-14 18:03:36,285 INFO L78 Accepts]: Start accepts. Automaton has 274 states and 280 transitions. Word has length 263 [2020-10-14 18:03:36,285 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 18:03:36,285 INFO L479 AbstractCegarLoop]: Abstraction has 274 states and 280 transitions. [2020-10-14 18:03:36,285 INFO L480 AbstractCegarLoop]: Interpolant automaton has 44 states. [2020-10-14 18:03:36,285 INFO L276 IsEmpty]: Start isEmpty. Operand 274 states and 280 transitions. [2020-10-14 18:03:36,287 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 270 [2020-10-14 18:03:36,287 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 18:03:36,287 INFO L422 BasicCegarLoop]: trace histogram [41, 41, 41, 41, 41, 41, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 18:03:36,287 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2020-10-14 18:03:36,287 INFO L427 AbstractCegarLoop]: === Iteration 42 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 18:03:36,288 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 18:03:36,288 INFO L82 PathProgramCache]: Analyzing trace with hash -1957658509, now seen corresponding path program 41 times [2020-10-14 18:03:36,288 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 18:03:36,288 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [524165989] [2020-10-14 18:03:36,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 18:03:36,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:03:36,333 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:03:36,576 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:03:36,805 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:03:37,023 FATAL L256 erpolLogProxyWrapper]: Now shrinking...