/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/sorting_selectionsort_2_ground.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-adbd35c [2020-10-14 17:47:36,948 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-14 17:47:36,950 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-14 17:47:36,992 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-14 17:47:36,992 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-14 17:47:37,000 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-14 17:47:37,002 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-14 17:47:37,006 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-14 17:47:37,008 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-14 17:47:37,011 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-14 17:47:37,012 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-14 17:47:37,013 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-14 17:47:37,013 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-14 17:47:37,016 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-14 17:47:37,018 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-14 17:47:37,020 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-14 17:47:37,021 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-14 17:47:37,022 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-14 17:47:37,024 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-14 17:47:37,032 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-14 17:47:37,034 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-14 17:47:37,035 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-14 17:47:37,036 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-14 17:47:37,036 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-14 17:47:37,049 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-14 17:47:37,049 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-14 17:47:37,049 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-14 17:47:37,050 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-14 17:47:37,051 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-14 17:47:37,052 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-14 17:47:37,052 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-14 17:47:37,053 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-14 17:47:37,053 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-14 17:47:37,054 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-14 17:47:37,055 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-14 17:47:37,055 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-14 17:47:37,056 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-14 17:47:37,056 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-14 17:47:37,056 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-14 17:47:37,057 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-14 17:47:37,058 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-14 17:47:37,059 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 17:47:37,081 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-14 17:47:37,081 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-14 17:47:37,082 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-14 17:47:37,082 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-14 17:47:37,082 INFO L138 SettingsManager]: * Use SBE=true [2020-10-14 17:47:37,083 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-14 17:47:37,083 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-14 17:47:37,083 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-14 17:47:37,083 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-14 17:47:37,083 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-14 17:47:37,084 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-14 17:47:37,084 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-14 17:47:37,084 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-14 17:47:37,084 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-14 17:47:37,084 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-14 17:47:37,085 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-14 17:47:37,085 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-14 17:47:37,085 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-14 17:47:37,085 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-14 17:47:37,085 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-14 17:47:37,086 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-14 17:47:37,086 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-14 17:47:37,086 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-14 17:47:37,086 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-14 17:47:37,087 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-14 17:47:37,087 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-14 17:47:37,087 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-14 17:47:37,087 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-14 17:47:37,087 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-14 17:47:37,087 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 17:47:37,379 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-14 17:47:37,391 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-14 17:47:37,395 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-14 17:47:37,396 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-14 17:47:37,396 INFO L275 PluginConnector]: CDTParser initialized [2020-10-14 17:47:37,397 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-examples/sorting_selectionsort_2_ground.i [2020-10-14 17:47:37,466 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/084458e61/bb726ee00e8240349777ab5590b9185f/FLAG8264ee025 [2020-10-14 17:47:37,941 INFO L306 CDTParser]: Found 1 translation units. [2020-10-14 17:47:37,943 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/array-examples/sorting_selectionsort_2_ground.i [2020-10-14 17:47:37,951 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/084458e61/bb726ee00e8240349777ab5590b9185f/FLAG8264ee025 [2020-10-14 17:47:38,340 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/084458e61/bb726ee00e8240349777ab5590b9185f [2020-10-14 17:47:38,348 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-14 17:47:38,349 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-14 17:47:38,350 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-14 17:47:38,351 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-14 17:47:38,354 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-14 17:47:38,355 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 05:47:38" (1/1) ... [2020-10-14 17:47:38,358 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@490952e6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 05:47:38, skipping insertion in model container [2020-10-14 17:47:38,358 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 05:47:38" (1/1) ... [2020-10-14 17:47:38,366 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-14 17:47:38,385 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-14 17:47:38,553 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-14 17:47:38,557 INFO L203 MainTranslator]: Completed pre-run [2020-10-14 17:47:38,583 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-14 17:47:38,603 INFO L208 MainTranslator]: Completed translation [2020-10-14 17:47:38,603 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 05:47:38 WrapperNode [2020-10-14 17:47:38,603 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-14 17:47:38,604 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-14 17:47:38,604 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-14 17:47:38,604 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-14 17:47:38,700 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 05:47:38" (1/1) ... [2020-10-14 17:47:38,701 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 05:47:38" (1/1) ... [2020-10-14 17:47:38,709 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 05:47:38" (1/1) ... [2020-10-14 17:47:38,709 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 05:47:38" (1/1) ... [2020-10-14 17:47:38,719 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 05:47:38" (1/1) ... [2020-10-14 17:47:38,726 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 05:47:38" (1/1) ... [2020-10-14 17:47:38,728 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 05:47:38" (1/1) ... [2020-10-14 17:47:38,730 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-14 17:47:38,731 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-14 17:47:38,731 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-14 17:47:38,731 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-14 17:47:38,732 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 05:47:38" (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 17:47:38,798 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-14 17:47:38,799 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-14 17:47:38,799 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-14 17:47:38,799 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-14 17:47:38,799 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-10-14 17:47:38,799 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-14 17:47:38,800 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-14 17:47:38,800 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-14 17:47:38,800 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-14 17:47:38,800 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-14 17:47:38,800 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-14 17:47:38,800 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-14 17:47:38,801 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-14 17:47:38,801 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-14 17:47:39,165 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-14 17:47:39,165 INFO L295 CfgBuilder]: Removed 8 assume(true) statements. [2020-10-14 17:47:39,170 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 05:47:39 BoogieIcfgContainer [2020-10-14 17:47:39,170 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-14 17:47:39,171 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-14 17:47:39,171 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-14 17:47:39,175 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-14 17:47:39,175 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.10 05:47:38" (1/3) ... [2020-10-14 17:47:39,176 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@79bba45f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 05:47:39, skipping insertion in model container [2020-10-14 17:47:39,176 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 05:47:38" (2/3) ... [2020-10-14 17:47:39,176 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@79bba45f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 05:47:39, skipping insertion in model container [2020-10-14 17:47:39,177 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 05:47:39" (3/3) ... [2020-10-14 17:47:39,178 INFO L109 eAbstractionObserver]: Analyzing ICFG sorting_selectionsort_2_ground.i [2020-10-14 17:47:39,189 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-14 17:47:39,197 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-14 17:47:39,211 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-14 17:47:39,234 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-10-14 17:47:39,235 INFO L376 AbstractCegarLoop]: Hoare is true [2020-10-14 17:47:39,235 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-14 17:47:39,235 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-14 17:47:39,235 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-14 17:47:39,235 INFO L380 AbstractCegarLoop]: Difference is false [2020-10-14 17:47:39,235 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-14 17:47:39,235 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-14 17:47:39,253 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states. [2020-10-14 17:47:39,260 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-10-14 17:47:39,260 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 17:47:39,261 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 17:47:39,262 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 17:47:39,267 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 17:47:39,267 INFO L82 PathProgramCache]: Analyzing trace with hash 1156372912, now seen corresponding path program 1 times [2020-10-14 17:47:39,275 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 17:47:39,276 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [803307189] [2020-10-14 17:47:39,276 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 17:47:39,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:47:39,407 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:47:39,433 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:47:39,511 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:47:39,512 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 24 [2020-10-14 17:47:39,512 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 17:47:39,513 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 122 [2020-10-14 17:47:39,518 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:47:39,518 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:47:39,519 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 17:47:39,519 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-14 17:47:39,519 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 17:47:39,520 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 6 [2020-10-14 17:47:39,577 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 17:47:39,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:47:39,583 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:47:39,594 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:47:39,597 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 17:47:39,597 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 17:47:39,597 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12 [2020-10-14 17:47:39,598 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:47:39,598 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:47:39,598 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 17:47:39,599 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 17:47:39,599 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 17:47:39,599 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 17:47:39,620 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 17:47:39,621 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [803307189] [2020-10-14 17:47:39,624 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 17:47:39,624 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-14 17:47:39,625 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1709673711] [2020-10-14 17:47:39,630 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-14 17:47:39,630 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 17:47:39,641 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-14 17:47:39,642 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-14 17:47:39,644 INFO L87 Difference]: Start difference. First operand 45 states. Second operand 3 states. [2020-10-14 17:47:39,870 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 17:47:39,871 INFO L93 Difference]: Finished difference Result 82 states and 123 transitions. [2020-10-14 17:47:39,871 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-14 17:47:39,873 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 16 [2020-10-14 17:47:39,874 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 17:47:39,892 INFO L225 Difference]: With dead ends: 82 [2020-10-14 17:47:39,892 INFO L226 Difference]: Without dead ends: 40 [2020-10-14 17:47:39,899 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-14 17:47:39,920 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2020-10-14 17:47:39,944 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2020-10-14 17:47:39,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-10-14 17:47:39,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 51 transitions. [2020-10-14 17:47:39,949 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 51 transitions. Word has length 16 [2020-10-14 17:47:39,950 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 17:47:39,950 INFO L479 AbstractCegarLoop]: Abstraction has 40 states and 51 transitions. [2020-10-14 17:47:39,950 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-14 17:47:39,951 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 51 transitions. [2020-10-14 17:47:39,951 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-10-14 17:47:39,952 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 17:47:39,952 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 17:47:39,953 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-14 17:47:39,953 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 17:47:39,953 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 17:47:39,953 INFO L82 PathProgramCache]: Analyzing trace with hash -2078459264, now seen corresponding path program 1 times [2020-10-14 17:47:39,954 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 17:47:39,954 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1495472672] [2020-10-14 17:47:39,954 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 17:47:39,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:47:39,977 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:47:40,002 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:47:40,168 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:47:40,168 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 24 [2020-10-14 17:47:40,168 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 17:47:40,169 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 199 [2020-10-14 17:47:40,169 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:47:40,173 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:47:40,174 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 17:47:40,174 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 17:47:40,174 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-14 17:47:40,174 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 5 [2020-10-14 17:47:40,217 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 17:47:40,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:47:40,221 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:47:40,225 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:47:40,226 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 17:47:40,226 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 17:47:40,226 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-14 17:47:40,227 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:47:40,227 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:47:40,227 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 17:47:40,228 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 17:47:40,228 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 17:47:40,228 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 17:47:40,232 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 17:47:40,233 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1495472672] [2020-10-14 17:47:40,233 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 17:47:40,233 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-14 17:47:40,234 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1775598203] [2020-10-14 17:47:40,236 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-14 17:47:40,236 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 17:47:40,237 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-14 17:47:40,237 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-14 17:47:40,237 INFO L87 Difference]: Start difference. First operand 40 states and 51 transitions. Second operand 4 states. [2020-10-14 17:47:40,429 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 17:47:40,430 INFO L93 Difference]: Finished difference Result 92 states and 123 transitions. [2020-10-14 17:47:40,430 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-14 17:47:40,431 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 16 [2020-10-14 17:47:40,431 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 17:47:40,432 INFO L225 Difference]: With dead ends: 92 [2020-10-14 17:47:40,433 INFO L226 Difference]: Without dead ends: 60 [2020-10-14 17:47:40,434 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 17:47:40,435 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2020-10-14 17:47:40,445 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 42. [2020-10-14 17:47:40,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-10-14 17:47:40,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 53 transitions. [2020-10-14 17:47:40,447 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 53 transitions. Word has length 16 [2020-10-14 17:47:40,448 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 17:47:40,448 INFO L479 AbstractCegarLoop]: Abstraction has 42 states and 53 transitions. [2020-10-14 17:47:40,448 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-14 17:47:40,448 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 53 transitions. [2020-10-14 17:47:40,449 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-10-14 17:47:40,449 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 17:47:40,449 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] [2020-10-14 17:47:40,450 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-14 17:47:40,450 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 17:47:40,450 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 17:47:40,451 INFO L82 PathProgramCache]: Analyzing trace with hash -898844059, now seen corresponding path program 1 times [2020-10-14 17:47:40,451 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 17:47:40,451 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [81845834] [2020-10-14 17:47:40,451 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 17:47:40,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:47:40,469 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:47:40,488 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:47:40,510 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:47:40,962 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:47:40,963 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 28 [2020-10-14 17:47:40,963 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-14 17:47:40,963 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 498 [2020-10-14 17:47:40,963 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:47:40,963 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:47:40,964 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-14 17:47:40,964 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-14 17:47:40,964 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-14 17:47:40,965 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-14 17:47:40,998 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 17:47:40,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:47:41,000 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:47:41,003 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:47:41,003 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 17:47:41,003 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 17:47:41,004 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-14 17:47:41,004 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:47:41,004 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:47:41,004 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 17:47:41,005 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 17:47:41,005 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 17:47:41,005 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 17:47:41,008 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-14 17:47:41,009 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [81845834] [2020-10-14 17:47:41,009 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 17:47:41,009 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-14 17:47:41,010 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1091798550] [2020-10-14 17:47:41,012 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-14 17:47:41,013 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 17:47:41,013 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-14 17:47:41,013 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-14 17:47:41,014 INFO L87 Difference]: Start difference. First operand 42 states and 53 transitions. Second operand 5 states. [2020-10-14 17:47:41,191 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 17:47:41,192 INFO L93 Difference]: Finished difference Result 86 states and 113 transitions. [2020-10-14 17:47:41,192 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-14 17:47:41,192 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 20 [2020-10-14 17:47:41,193 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 17:47:41,194 INFO L225 Difference]: With dead ends: 86 [2020-10-14 17:47:41,194 INFO L226 Difference]: Without dead ends: 55 [2020-10-14 17:47:41,195 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-14 17:47:41,195 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2020-10-14 17:47:41,203 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 48. [2020-10-14 17:47:41,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-10-14 17:47:41,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 62 transitions. [2020-10-14 17:47:41,205 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 62 transitions. Word has length 20 [2020-10-14 17:47:41,205 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 17:47:41,205 INFO L479 AbstractCegarLoop]: Abstraction has 48 states and 62 transitions. [2020-10-14 17:47:41,205 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-14 17:47:41,205 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 62 transitions. [2020-10-14 17:47:41,206 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-14 17:47:41,206 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 17:47:41,207 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] [2020-10-14 17:47:41,207 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-14 17:47:41,207 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 17:47:41,207 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 17:47:41,208 INFO L82 PathProgramCache]: Analyzing trace with hash 717010635, now seen corresponding path program 1 times [2020-10-14 17:47:41,208 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 17:47:41,208 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1633116218] [2020-10-14 17:47:41,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 17:47:41,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:47:41,220 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:47:41,232 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:47:41,312 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:47:41,313 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 29 [2020-10-14 17:47:41,313 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 17:47:41,313 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 95 [2020-10-14 17:47:41,314 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:47:41,314 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:47:41,314 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-14 17:47:41,315 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 17:47:41,315 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 4 [2020-10-14 17:47:41,315 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 17:47:41,351 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 17:47:41,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:47:41,353 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:47:41,356 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:47:41,356 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 17:47:41,357 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 17:47:41,357 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-14 17:47:41,357 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:47:41,357 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:47:41,358 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 17:47:41,358 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 17:47:41,359 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 17:47:41,360 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-14 17:47:41,364 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 17:47:41,365 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1633116218] [2020-10-14 17:47:41,365 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 17:47:41,365 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-14 17:47:41,366 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1011900102] [2020-10-14 17:47:41,367 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-14 17:47:41,367 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 17:47:41,368 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-14 17:47:41,368 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-14 17:47:41,368 INFO L87 Difference]: Start difference. First operand 48 states and 62 transitions. Second operand 5 states. [2020-10-14 17:47:41,616 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 17:47:41,616 INFO L93 Difference]: Finished difference Result 114 states and 153 transitions. [2020-10-14 17:47:41,617 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-14 17:47:41,617 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 21 [2020-10-14 17:47:41,617 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 17:47:41,618 INFO L225 Difference]: With dead ends: 114 [2020-10-14 17:47:41,618 INFO L226 Difference]: Without dead ends: 75 [2020-10-14 17:47:41,619 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 17:47:41,620 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2020-10-14 17:47:41,628 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 57. [2020-10-14 17:47:41,628 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-10-14 17:47:41,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 73 transitions. [2020-10-14 17:47:41,630 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 73 transitions. Word has length 21 [2020-10-14 17:47:41,630 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 17:47:41,630 INFO L479 AbstractCegarLoop]: Abstraction has 57 states and 73 transitions. [2020-10-14 17:47:41,630 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-14 17:47:41,631 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 73 transitions. [2020-10-14 17:47:41,631 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-14 17:47:41,631 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 17:47:41,632 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 17:47:41,632 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-14 17:47:41,632 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 17:47:41,632 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 17:47:41,633 INFO L82 PathProgramCache]: Analyzing trace with hash -1931807191, now seen corresponding path program 2 times [2020-10-14 17:47:41,633 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 17:47:41,633 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [62322187] [2020-10-14 17:47:41,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 17:47:41,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:47:41,651 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:47:41,667 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:47:41,798 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:47:41,799 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 31 [2020-10-14 17:47:41,799 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 17:47:41,799 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 153 [2020-10-14 17:47:41,800 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:47:41,800 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:47:41,801 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-14 17:47:41,801 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 17:47:41,801 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-14 17:47:41,801 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 17:47:41,845 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 17:47:41,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:47:41,849 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:47:41,851 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:47:41,852 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 17:47:41,852 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 17:47:41,853 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-14 17:47:41,853 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:47:41,854 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:47:41,854 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 17:47:41,855 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 17:47:41,855 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 17:47:41,855 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-14 17:47:41,858 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 17:47:41,859 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [62322187] [2020-10-14 17:47:41,859 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 17:47:41,860 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-14 17:47:41,860 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1919112644] [2020-10-14 17:47:41,860 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-14 17:47:41,861 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 17:47:41,861 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-14 17:47:41,861 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-14 17:47:41,862 INFO L87 Difference]: Start difference. First operand 57 states and 73 transitions. Second operand 6 states. [2020-10-14 17:47:42,126 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 17:47:42,127 INFO L93 Difference]: Finished difference Result 141 states and 190 transitions. [2020-10-14 17:47:42,127 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-14 17:47:42,127 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 23 [2020-10-14 17:47:42,128 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 17:47:42,129 INFO L225 Difference]: With dead ends: 141 [2020-10-14 17:47:42,129 INFO L226 Difference]: Without dead ends: 95 [2020-10-14 17:47:42,130 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 17:47:42,131 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2020-10-14 17:47:42,139 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 77. [2020-10-14 17:47:42,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2020-10-14 17:47:42,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 101 transitions. [2020-10-14 17:47:42,141 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 101 transitions. Word has length 23 [2020-10-14 17:47:42,141 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 17:47:42,142 INFO L479 AbstractCegarLoop]: Abstraction has 77 states and 101 transitions. [2020-10-14 17:47:42,142 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-14 17:47:42,142 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 101 transitions. [2020-10-14 17:47:42,143 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-14 17:47:42,143 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 17:47:42,143 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 17:47:42,143 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-14 17:47:42,143 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 17:47:42,144 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 17:47:42,144 INFO L82 PathProgramCache]: Analyzing trace with hash -530131449, now seen corresponding path program 3 times [2020-10-14 17:47:42,144 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 17:47:42,145 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [625657715] [2020-10-14 17:47:42,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 17:47:42,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:47:42,161 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:47:42,175 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:47:42,335 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:47:42,336 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 33 [2020-10-14 17:47:42,336 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 17:47:42,336 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 179 [2020-10-14 17:47:42,337 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:47:42,337 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:47:42,337 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-14 17:47:42,337 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 17:47:42,338 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-14 17:47:42,338 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 17:47:42,379 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 17:47:42,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:47:42,381 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:47:42,383 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:47:42,383 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 17:47:42,384 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 17:47:42,384 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-14 17:47:42,384 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:47:42,384 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:47:42,385 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 17:47:42,385 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 17:47:42,385 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 17:47:42,385 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 17:47:42,388 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 17:47:42,388 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [625657715] [2020-10-14 17:47:42,389 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 17:47:42,389 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-14 17:47:42,389 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [717154601] [2020-10-14 17:47:42,389 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-14 17:47:42,390 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 17:47:42,390 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-14 17:47:42,390 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-10-14 17:47:42,390 INFO L87 Difference]: Start difference. First operand 77 states and 101 transitions. Second operand 7 states. [2020-10-14 17:47:42,651 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 17:47:42,651 INFO L93 Difference]: Finished difference Result 179 states and 244 transitions. [2020-10-14 17:47:42,652 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-14 17:47:42,652 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 25 [2020-10-14 17:47:42,652 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 17:47:42,653 INFO L225 Difference]: With dead ends: 179 [2020-10-14 17:47:42,653 INFO L226 Difference]: Without dead ends: 115 [2020-10-14 17:47:42,654 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 17:47:42,655 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2020-10-14 17:47:42,664 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 97. [2020-10-14 17:47:42,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2020-10-14 17:47:42,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 129 transitions. [2020-10-14 17:47:42,666 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 129 transitions. Word has length 25 [2020-10-14 17:47:42,667 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 17:47:42,667 INFO L479 AbstractCegarLoop]: Abstraction has 97 states and 129 transitions. [2020-10-14 17:47:42,667 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-14 17:47:42,667 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 129 transitions. [2020-10-14 17:47:42,668 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-14 17:47:42,668 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 17:47:42,668 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 17:47:42,668 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-14 17:47:42,669 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 17:47:42,669 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 17:47:42,669 INFO L82 PathProgramCache]: Analyzing trace with hash -2139474331, now seen corresponding path program 4 times [2020-10-14 17:47:42,669 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 17:47:42,670 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1629952727] [2020-10-14 17:47:42,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 17:47:42,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:47:42,687 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:47:42,700 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:47:42,950 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:47:42,951 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 35 [2020-10-14 17:47:42,951 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 17:47:42,951 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 269 [2020-10-14 17:47:42,952 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:47:42,952 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:47:42,952 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-14 17:47:42,952 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 17:47:42,953 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-14 17:47:42,953 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 17:47:43,017 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 17:47:43,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:47:43,022 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:47:43,024 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:47:43,025 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 17:47:43,025 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 17:47:43,025 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-14 17:47:43,026 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:47:43,026 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:47:43,026 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 17:47:43,026 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 17:47:43,026 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 17:47:43,027 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 17:47:43,030 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 17:47:43,030 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1629952727] [2020-10-14 17:47:43,030 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 17:47:43,031 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-14 17:47:43,031 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [843245616] [2020-10-14 17:47:43,032 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-14 17:47:43,032 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 17:47:43,032 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-14 17:47:43,033 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-10-14 17:47:43,033 INFO L87 Difference]: Start difference. First operand 97 states and 129 transitions. Second operand 8 states. [2020-10-14 17:47:43,358 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 17:47:43,358 INFO L93 Difference]: Finished difference Result 217 states and 298 transitions. [2020-10-14 17:47:43,359 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-14 17:47:43,359 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 27 [2020-10-14 17:47:43,359 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 17:47:43,360 INFO L225 Difference]: With dead ends: 217 [2020-10-14 17:47:43,361 INFO L226 Difference]: Without dead ends: 135 [2020-10-14 17:47:43,364 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 17:47:43,365 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2020-10-14 17:47:43,382 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 117. [2020-10-14 17:47:43,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 117 states. [2020-10-14 17:47:43,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 157 transitions. [2020-10-14 17:47:43,386 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 157 transitions. Word has length 27 [2020-10-14 17:47:43,386 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 17:47:43,386 INFO L479 AbstractCegarLoop]: Abstraction has 117 states and 157 transitions. [2020-10-14 17:47:43,386 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-14 17:47:43,387 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 157 transitions. [2020-10-14 17:47:43,391 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-10-14 17:47:43,391 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 17:47:43,392 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 17:47:43,392 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-14 17:47:43,393 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 17:47:43,393 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 17:47:43,393 INFO L82 PathProgramCache]: Analyzing trace with hash 1765209923, now seen corresponding path program 5 times [2020-10-14 17:47:43,393 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 17:47:43,394 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [118008911] [2020-10-14 17:47:43,394 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 17:47:43,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:47:43,417 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:47:43,433 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:47:43,741 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:47:43,741 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 37 [2020-10-14 17:47:43,741 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 17:47:43,742 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 330 [2020-10-14 17:47:43,742 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:47:43,742 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:47:43,742 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-14 17:47:43,743 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 17:47:43,743 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-14 17:47:43,743 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:47:43,804 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 17:47:43,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:47:43,806 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:47:43,809 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:47:43,809 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 17:47:43,810 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 17:47:43,810 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-14 17:47:43,810 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:47:43,811 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:47:43,811 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 17:47:43,811 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 17:47:43,812 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 17:47:43,812 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 17:47:43,816 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 17:47:43,816 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [118008911] [2020-10-14 17:47:43,816 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 17:47:43,817 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-14 17:47:43,817 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [451754569] [2020-10-14 17:47:43,818 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-14 17:47:43,819 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 17:47:43,819 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-14 17:47:43,819 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-10-14 17:47:43,820 INFO L87 Difference]: Start difference. First operand 117 states and 157 transitions. Second operand 9 states. [2020-10-14 17:47:44,136 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 17:47:44,137 INFO L93 Difference]: Finished difference Result 255 states and 352 transitions. [2020-10-14 17:47:44,138 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-14 17:47:44,138 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 29 [2020-10-14 17:47:44,139 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 17:47:44,140 INFO L225 Difference]: With dead ends: 255 [2020-10-14 17:47:44,140 INFO L226 Difference]: Without dead ends: 155 [2020-10-14 17:47:44,142 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 17:47:44,142 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2020-10-14 17:47:44,163 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 137. [2020-10-14 17:47:44,164 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 137 states. [2020-10-14 17:47:44,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 185 transitions. [2020-10-14 17:47:44,165 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 185 transitions. Word has length 29 [2020-10-14 17:47:44,167 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 17:47:44,168 INFO L479 AbstractCegarLoop]: Abstraction has 137 states and 185 transitions. [2020-10-14 17:47:44,168 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-14 17:47:44,168 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 185 transitions. [2020-10-14 17:47:44,170 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-10-14 17:47:44,171 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 17:47:44,171 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 17:47:44,171 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-14 17:47:44,171 INFO L427 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 17:47:44,172 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 17:47:44,172 INFO L82 PathProgramCache]: Analyzing trace with hash 365361313, now seen corresponding path program 6 times [2020-10-14 17:47:44,172 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 17:47:44,172 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [33361376] [2020-10-14 17:47:44,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 17:47:44,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:47:44,194 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:47:44,214 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:47:44,607 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:47:44,607 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 39 [2020-10-14 17:47:44,608 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 17:47:44,608 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 419 [2020-10-14 17:47:44,608 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:47:44,608 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:47:44,609 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-14 17:47:44,609 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 17:47:44,609 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-14 17:47:44,609 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 17:47:44,676 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 17:47:44,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:47:44,678 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:47:44,679 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:47:44,680 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 17:47:44,680 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 17:47:44,681 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-14 17:47:44,681 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:47:44,681 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:47:44,682 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 17:47:44,682 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 17:47:44,682 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 17:47:44,682 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 17:47:44,686 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 17:47:44,691 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [33361376] [2020-10-14 17:47:44,692 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 17:47:44,692 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-14 17:47:44,693 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1628764854] [2020-10-14 17:47:44,693 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-14 17:47:44,693 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 17:47:44,693 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-14 17:47:44,694 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2020-10-14 17:47:44,694 INFO L87 Difference]: Start difference. First operand 137 states and 185 transitions. Second operand 10 states. [2020-10-14 17:47:45,027 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 17:47:45,027 INFO L93 Difference]: Finished difference Result 293 states and 406 transitions. [2020-10-14 17:47:45,028 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-14 17:47:45,028 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 31 [2020-10-14 17:47:45,028 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 17:47:45,030 INFO L225 Difference]: With dead ends: 293 [2020-10-14 17:47:45,030 INFO L226 Difference]: Without dead ends: 175 [2020-10-14 17:47:45,031 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 17:47:45,032 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2020-10-14 17:47:45,044 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 157. [2020-10-14 17:47:45,045 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 157 states. [2020-10-14 17:47:45,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 213 transitions. [2020-10-14 17:47:45,046 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 213 transitions. Word has length 31 [2020-10-14 17:47:45,047 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 17:47:45,047 INFO L479 AbstractCegarLoop]: Abstraction has 157 states and 213 transitions. [2020-10-14 17:47:45,047 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-14 17:47:45,047 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 213 transitions. [2020-10-14 17:47:45,048 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-10-14 17:47:45,048 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 17:47:45,048 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 17:47:45,048 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-14 17:47:45,049 INFO L427 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 17:47:45,049 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 17:47:45,049 INFO L82 PathProgramCache]: Analyzing trace with hash -564389249, now seen corresponding path program 7 times [2020-10-14 17:47:45,050 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 17:47:45,050 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [9342506] [2020-10-14 17:47:45,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 17:47:45,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:47:45,074 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:47:45,093 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:47:45,461 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:47:45,461 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 41 [2020-10-14 17:47:45,462 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 17:47:45,462 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 394 [2020-10-14 17:47:45,462 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:47:45,462 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:47:45,462 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-14 17:47:45,463 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 17:47:45,463 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-14 17:47:45,463 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 17:47:45,533 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 17:47:45,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:47:45,535 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:47:45,536 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:47:45,536 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 17:47:45,537 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 17:47:45,537 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 17:47:45,537 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:47:45,537 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:47:45,538 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 17:47:45,538 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 17:47:45,538 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 17:47:45,538 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 17:47:45,541 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 17:47:45,541 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [9342506] [2020-10-14 17:47:45,542 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 17:47:45,542 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-14 17:47:45,542 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [121879542] [2020-10-14 17:47:45,542 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-14 17:47:45,543 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 17:47:45,543 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-14 17:47:45,543 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2020-10-14 17:47:45,543 INFO L87 Difference]: Start difference. First operand 157 states and 213 transitions. Second operand 11 states. [2020-10-14 17:47:45,887 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 17:47:45,888 INFO L93 Difference]: Finished difference Result 331 states and 460 transitions. [2020-10-14 17:47:45,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-14 17:47:45,888 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 33 [2020-10-14 17:47:45,889 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 17:47:45,890 INFO L225 Difference]: With dead ends: 331 [2020-10-14 17:47:45,891 INFO L226 Difference]: Without dead ends: 195 [2020-10-14 17:47:45,892 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 17:47:45,893 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 195 states. [2020-10-14 17:47:45,901 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 195 to 177. [2020-10-14 17:47:45,902 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 177 states. [2020-10-14 17:47:45,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177 states to 177 states and 241 transitions. [2020-10-14 17:47:45,903 INFO L78 Accepts]: Start accepts. Automaton has 177 states and 241 transitions. Word has length 33 [2020-10-14 17:47:45,904 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 17:47:45,904 INFO L479 AbstractCegarLoop]: Abstraction has 177 states and 241 transitions. [2020-10-14 17:47:45,904 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-14 17:47:45,904 INFO L276 IsEmpty]: Start isEmpty. Operand 177 states and 241 transitions. [2020-10-14 17:47:45,905 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-10-14 17:47:45,905 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 17:47:45,905 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 17:47:45,905 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-14 17:47:45,906 INFO L427 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 17:47:45,906 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 17:47:45,906 INFO L82 PathProgramCache]: Analyzing trace with hash -701481763, now seen corresponding path program 8 times [2020-10-14 17:47:45,906 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 17:47:45,906 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [961187988] [2020-10-14 17:47:45,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 17:47:45,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:47:45,922 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:47:45,936 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:47:46,395 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:47:46,396 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 43 [2020-10-14 17:47:46,396 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 17:47:46,396 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 478 [2020-10-14 17:47:46,396 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:47:46,397 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:47:46,397 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-14 17:47:46,397 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 17:47:46,397 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-14 17:47:46,397 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 17:47:46,508 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 17:47:46,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:47:46,511 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:47:46,513 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:47:46,513 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 17:47:46,514 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 17:47:46,514 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-14 17:47:46,514 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:47:46,515 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:47:46,515 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 17:47:46,516 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 17:47:46,516 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 17:47:46,516 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 17:47:46,522 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 17:47:46,522 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [961187988] [2020-10-14 17:47:46,523 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 17:47:46,523 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-14 17:47:46,524 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1858233601] [2020-10-14 17:47:46,526 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-14 17:47:46,526 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 17:47:46,527 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-14 17:47:46,527 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2020-10-14 17:47:46,527 INFO L87 Difference]: Start difference. First operand 177 states and 241 transitions. Second operand 12 states. [2020-10-14 17:47:47,010 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 17:47:47,011 INFO L93 Difference]: Finished difference Result 369 states and 514 transitions. [2020-10-14 17:47:47,011 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-14 17:47:47,011 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 35 [2020-10-14 17:47:47,011 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 17:47:47,013 INFO L225 Difference]: With dead ends: 369 [2020-10-14 17:47:47,013 INFO L226 Difference]: Without dead ends: 215 [2020-10-14 17:47:47,015 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 17:47:47,017 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 215 states. [2020-10-14 17:47:47,033 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 215 to 197. [2020-10-14 17:47:47,033 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 197 states. [2020-10-14 17:47:47,035 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 197 states to 197 states and 269 transitions. [2020-10-14 17:47:47,035 INFO L78 Accepts]: Start accepts. Automaton has 197 states and 269 transitions. Word has length 35 [2020-10-14 17:47:47,036 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 17:47:47,036 INFO L479 AbstractCegarLoop]: Abstraction has 197 states and 269 transitions. [2020-10-14 17:47:47,036 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-14 17:47:47,036 INFO L276 IsEmpty]: Start isEmpty. Operand 197 states and 269 transitions. [2020-10-14 17:47:47,037 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-10-14 17:47:47,037 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 17:47:47,038 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 17:47:47,038 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-14 17:47:47,038 INFO L427 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 17:47:47,039 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 17:47:47,039 INFO L82 PathProgramCache]: Analyzing trace with hash 696598459, now seen corresponding path program 9 times [2020-10-14 17:47:47,039 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 17:47:47,040 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1686335991] [2020-10-14 17:47:47,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 17:47:47,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:47:47,062 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:47:47,095 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:47:47,658 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:47:47,659 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 45 [2020-10-14 17:47:47,659 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 17:47:47,659 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 603 [2020-10-14 17:47:47,659 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:47:47,660 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:47:47,660 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-14 17:47:47,660 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 17:47:47,660 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-14 17:47:47,661 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 17:47:47,766 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 17:47:47,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:47:47,768 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:47:47,769 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:47:47,770 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 17:47:47,770 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 17:47:47,770 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-14 17:47:47,770 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:47:47,770 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:47:47,771 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 17:47:47,771 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 17:47:47,771 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 17:47:47,771 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 17:47:47,777 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 17:47:47,777 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1686335991] [2020-10-14 17:47:47,778 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 17:47:47,778 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-14 17:47:47,778 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [345008578] [2020-10-14 17:47:47,778 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-14 17:47:47,779 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 17:47:47,779 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-14 17:47:47,779 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2020-10-14 17:47:47,779 INFO L87 Difference]: Start difference. First operand 197 states and 269 transitions. Second operand 13 states. [2020-10-14 17:47:48,182 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 17:47:48,182 INFO L93 Difference]: Finished difference Result 407 states and 568 transitions. [2020-10-14 17:47:48,183 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-14 17:47:48,183 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 37 [2020-10-14 17:47:48,183 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 17:47:48,185 INFO L225 Difference]: With dead ends: 407 [2020-10-14 17:47:48,187 INFO L226 Difference]: Without dead ends: 235 [2020-10-14 17:47:48,188 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2020-10-14 17:47:48,189 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 235 states. [2020-10-14 17:47:48,205 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 235 to 217. [2020-10-14 17:47:48,205 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 217 states. [2020-10-14 17:47:48,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 217 states to 217 states and 297 transitions. [2020-10-14 17:47:48,207 INFO L78 Accepts]: Start accepts. Automaton has 217 states and 297 transitions. Word has length 37 [2020-10-14 17:47:48,208 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 17:47:48,208 INFO L479 AbstractCegarLoop]: Abstraction has 217 states and 297 transitions. [2020-10-14 17:47:48,208 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-14 17:47:48,208 INFO L276 IsEmpty]: Start isEmpty. Operand 217 states and 297 transitions. [2020-10-14 17:47:48,209 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-10-14 17:47:48,209 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 17:47:48,209 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 17:47:48,209 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-14 17:47:48,210 INFO L427 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 17:47:48,210 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 17:47:48,210 INFO L82 PathProgramCache]: Analyzing trace with hash -73071847, now seen corresponding path program 10 times [2020-10-14 17:47:48,211 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 17:47:48,211 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1853497543] [2020-10-14 17:47:48,211 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 17:47:48,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:47:48,234 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:47:48,251 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:47:49,025 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:47:49,025 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 47 [2020-10-14 17:47:49,026 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 17:47:49,026 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 800 [2020-10-14 17:47:49,026 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:47:49,026 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:47:49,026 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-14 17:47:49,027 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 17:47:49,027 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-14 17:47:49,027 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:47:49,140 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 17:47:49,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:47:49,141 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:47:49,142 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:47:49,143 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 17:47:49,143 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 17:47:49,143 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 17:47:49,143 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:47:49,143 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:47:49,144 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 17:47:49,144 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 17:47:49,144 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 17:47:49,144 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:47:49,147 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 17:47:49,148 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1853497543] [2020-10-14 17:47:49,148 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 17:47:49,148 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-14 17:47:49,148 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1555203338] [2020-10-14 17:47:49,149 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-14 17:47:49,149 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 17:47:49,149 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-14 17:47:49,149 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2020-10-14 17:47:49,150 INFO L87 Difference]: Start difference. First operand 217 states and 297 transitions. Second operand 14 states. [2020-10-14 17:47:49,641 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 17:47:49,642 INFO L93 Difference]: Finished difference Result 445 states and 622 transitions. [2020-10-14 17:47:49,642 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-14 17:47:49,643 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 39 [2020-10-14 17:47:49,643 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 17:47:49,645 INFO L225 Difference]: With dead ends: 445 [2020-10-14 17:47:49,645 INFO L226 Difference]: Without dead ends: 255 [2020-10-14 17:47:49,647 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2020-10-14 17:47:49,648 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 255 states. [2020-10-14 17:47:49,661 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 255 to 237. [2020-10-14 17:47:49,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 237 states. [2020-10-14 17:47:49,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 237 states to 237 states and 325 transitions. [2020-10-14 17:47:49,663 INFO L78 Accepts]: Start accepts. Automaton has 237 states and 325 transitions. Word has length 39 [2020-10-14 17:47:49,663 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 17:47:49,664 INFO L479 AbstractCegarLoop]: Abstraction has 237 states and 325 transitions. [2020-10-14 17:47:49,664 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-14 17:47:49,664 INFO L276 IsEmpty]: Start isEmpty. Operand 237 states and 325 transitions. [2020-10-14 17:47:49,664 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-10-14 17:47:49,664 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 17:47:49,665 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 17:47:49,665 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-14 17:47:49,665 INFO L427 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 17:47:49,665 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 17:47:49,666 INFO L82 PathProgramCache]: Analyzing trace with hash -991861001, now seen corresponding path program 11 times [2020-10-14 17:47:49,666 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 17:47:49,666 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1738888525] [2020-10-14 17:47:49,667 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 17:47:49,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:47:49,691 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:47:49,711 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:47:50,785 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:47:50,786 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 49 [2020-10-14 17:47:50,786 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 17:47:50,787 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1102 [2020-10-14 17:47:50,787 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:47:50,787 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:47:50,788 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-14 17:47:50,788 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 17:47:50,788 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-10-14 17:47:50,788 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 17:47:50,964 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 17:47:50,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:47:50,967 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:47:50,969 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:47:50,969 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 17:47:50,969 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 17:47:50,970 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-14 17:47:50,970 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:47:50,970 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:47:50,971 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 17:47:50,971 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 17:47:50,972 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 17:47:50,972 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 17:47:50,977 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 17:47:50,978 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1738888525] [2020-10-14 17:47:50,978 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 17:47:50,978 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-14 17:47:50,978 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [929158333] [2020-10-14 17:47:50,979 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-14 17:47:50,979 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 17:47:50,979 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-14 17:47:50,980 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210 [2020-10-14 17:47:50,980 INFO L87 Difference]: Start difference. First operand 237 states and 325 transitions. Second operand 15 states. [2020-10-14 17:47:51,581 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 17:47:51,581 INFO L93 Difference]: Finished difference Result 483 states and 676 transitions. [2020-10-14 17:47:51,581 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-14 17:47:51,582 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 41 [2020-10-14 17:47:51,582 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 17:47:51,585 INFO L225 Difference]: With dead ends: 483 [2020-10-14 17:47:51,585 INFO L226 Difference]: Without dead ends: 275 [2020-10-14 17:47:51,587 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 17:47:51,587 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 275 states. [2020-10-14 17:47:51,600 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 275 to 257. [2020-10-14 17:47:51,600 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 257 states. [2020-10-14 17:47:51,602 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 257 states to 257 states and 353 transitions. [2020-10-14 17:47:51,602 INFO L78 Accepts]: Start accepts. Automaton has 257 states and 353 transitions. Word has length 41 [2020-10-14 17:47:51,602 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 17:47:51,602 INFO L479 AbstractCegarLoop]: Abstraction has 257 states and 353 transitions. [2020-10-14 17:47:51,603 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-14 17:47:51,603 INFO L276 IsEmpty]: Start isEmpty. Operand 257 states and 353 transitions. [2020-10-14 17:47:51,603 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-10-14 17:47:51,603 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 17:47:51,603 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 17:47:51,604 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-14 17:47:51,604 INFO L427 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 17:47:51,604 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 17:47:51,604 INFO L82 PathProgramCache]: Analyzing trace with hash 815024981, now seen corresponding path program 12 times [2020-10-14 17:47:51,604 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 17:47:51,605 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1255370713] [2020-10-14 17:47:51,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 17:47:51,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:47:51,627 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:47:51,643 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:47:52,513 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:47:52,514 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 51 [2020-10-14 17:47:52,514 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 17:47:52,514 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 894 [2020-10-14 17:47:52,515 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:47:52,515 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:47:52,515 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-14 17:47:52,515 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 17:47:52,515 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-14 17:47:52,515 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:47:52,695 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 17:47:52,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:47:52,698 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:47:52,700 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:47:52,700 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 17:47:52,700 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 17:47:52,701 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-14 17:47:52,701 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:47:52,701 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:47:52,701 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 17:47:52,702 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 17:47:52,702 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 17:47:52,702 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 17:47:52,706 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 17:47:52,707 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1255370713] [2020-10-14 17:47:52,707 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 17:47:52,707 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-14 17:47:52,708 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [622575569] [2020-10-14 17:47:52,709 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-14 17:47:52,709 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 17:47:52,709 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-14 17:47:52,710 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=133, Unknown=0, NotChecked=0, Total=240 [2020-10-14 17:47:52,710 INFO L87 Difference]: Start difference. First operand 257 states and 353 transitions. Second operand 16 states. [2020-10-14 17:47:53,306 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 17:47:53,306 INFO L93 Difference]: Finished difference Result 521 states and 730 transitions. [2020-10-14 17:47:53,307 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-14 17:47:53,307 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 43 [2020-10-14 17:47:53,307 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 17:47:53,311 INFO L225 Difference]: With dead ends: 521 [2020-10-14 17:47:53,312 INFO L226 Difference]: Without dead ends: 295 [2020-10-14 17:47:53,313 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 17:47:53,314 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 295 states. [2020-10-14 17:47:53,332 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 295 to 277. [2020-10-14 17:47:53,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 277 states. [2020-10-14 17:47:53,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 277 states to 277 states and 381 transitions. [2020-10-14 17:47:53,334 INFO L78 Accepts]: Start accepts. Automaton has 277 states and 381 transitions. Word has length 43 [2020-10-14 17:47:53,335 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 17:47:53,335 INFO L479 AbstractCegarLoop]: Abstraction has 277 states and 381 transitions. [2020-10-14 17:47:53,335 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-14 17:47:53,335 INFO L276 IsEmpty]: Start isEmpty. Operand 277 states and 381 transitions. [2020-10-14 17:47:53,335 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-10-14 17:47:53,335 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 17:47:53,336 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 17:47:53,336 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-14 17:47:53,336 INFO L427 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 17:47:53,336 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 17:47:53,336 INFO L82 PathProgramCache]: Analyzing trace with hash 2065666099, now seen corresponding path program 13 times [2020-10-14 17:47:53,337 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 17:47:53,337 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [357461843] [2020-10-14 17:47:53,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 17:47:53,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:47:53,361 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:47:53,400 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:47:54,295 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:47:54,296 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 53 [2020-10-14 17:47:54,296 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 17:47:54,296 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 943 [2020-10-14 17:47:54,296 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:47:54,296 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:47:54,297 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-14 17:47:54,297 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 17:47:54,297 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-10-14 17:47:54,297 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:47:54,452 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 17:47:54,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:47:54,454 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:47:54,456 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:47:54,456 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 17:47:54,457 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 17:47:54,457 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 17:47:54,457 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:47:54,458 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:47:54,458 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 17:47:54,458 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 17:47:54,458 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 17:47:54,458 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:47:54,462 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 17:47:54,462 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [357461843] [2020-10-14 17:47:54,464 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 17:47:54,464 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-14 17:47:54,465 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1519785901] [2020-10-14 17:47:54,465 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-14 17:47:54,465 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 17:47:54,465 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-14 17:47:54,466 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=150, Unknown=0, NotChecked=0, Total=272 [2020-10-14 17:47:54,466 INFO L87 Difference]: Start difference. First operand 277 states and 381 transitions. Second operand 17 states. [2020-10-14 17:47:55,003 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 17:47:55,003 INFO L93 Difference]: Finished difference Result 559 states and 784 transitions. [2020-10-14 17:47:55,004 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-14 17:47:55,004 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 45 [2020-10-14 17:47:55,004 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 17:47:55,007 INFO L225 Difference]: With dead ends: 559 [2020-10-14 17:47:55,007 INFO L226 Difference]: Without dead ends: 315 [2020-10-14 17:47:55,008 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 17:47:55,009 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 315 states. [2020-10-14 17:47:55,023 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 315 to 297. [2020-10-14 17:47:55,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 297 states. [2020-10-14 17:47:55,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 297 states to 297 states and 409 transitions. [2020-10-14 17:47:55,026 INFO L78 Accepts]: Start accepts. Automaton has 297 states and 409 transitions. Word has length 45 [2020-10-14 17:47:55,026 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 17:47:55,026 INFO L479 AbstractCegarLoop]: Abstraction has 297 states and 409 transitions. [2020-10-14 17:47:55,026 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-14 17:47:55,026 INFO L276 IsEmpty]: Start isEmpty. Operand 297 states and 409 transitions. [2020-10-14 17:47:55,027 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-10-14 17:47:55,027 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 17:47:55,027 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 17:47:55,027 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-14 17:47:55,027 INFO L427 AbstractCegarLoop]: === Iteration 17 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 17:47:55,028 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 17:47:55,028 INFO L82 PathProgramCache]: Analyzing trace with hash 1340937617, now seen corresponding path program 14 times [2020-10-14 17:47:55,028 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 17:47:55,028 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [269987643] [2020-10-14 17:47:55,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 17:47:55,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:47:55,050 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:47:55,065 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:47:56,284 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:47:56,284 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 55 [2020-10-14 17:47:56,284 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 17:47:56,284 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1241 [2020-10-14 17:47:56,285 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:47:56,285 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:47:56,285 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-14 17:47:56,285 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 17:47:56,285 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-14 17:47:56,286 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 17:47:56,516 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 17:47:56,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:47:56,519 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:47:56,521 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:47:56,521 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 17:47:56,522 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 17:47:56,522 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-14 17:47:56,522 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:47:56,523 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:47:56,523 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 17:47:56,523 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 17:47:56,524 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 17:47:56,524 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 17:47:56,535 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 17:47:56,536 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [269987643] [2020-10-14 17:47:56,536 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 17:47:56,537 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-14 17:47:56,537 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2029198396] [2020-10-14 17:47:56,539 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-14 17:47:56,539 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 17:47:56,542 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-14 17:47:56,543 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2020-10-14 17:47:56,543 INFO L87 Difference]: Start difference. First operand 297 states and 409 transitions. Second operand 18 states. [2020-10-14 17:47:57,256 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 17:47:57,256 INFO L93 Difference]: Finished difference Result 597 states and 838 transitions. [2020-10-14 17:47:57,256 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-14 17:47:57,257 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 47 [2020-10-14 17:47:57,257 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 17:47:57,259 INFO L225 Difference]: With dead ends: 597 [2020-10-14 17:47:57,259 INFO L226 Difference]: Without dead ends: 335 [2020-10-14 17:47:57,261 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2020-10-14 17:47:57,262 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 335 states. [2020-10-14 17:47:57,279 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 335 to 317. [2020-10-14 17:47:57,279 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 317 states. [2020-10-14 17:47:57,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 317 states to 317 states and 437 transitions. [2020-10-14 17:47:57,286 INFO L78 Accepts]: Start accepts. Automaton has 317 states and 437 transitions. Word has length 47 [2020-10-14 17:47:57,287 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 17:47:57,287 INFO L479 AbstractCegarLoop]: Abstraction has 317 states and 437 transitions. [2020-10-14 17:47:57,287 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-14 17:47:57,287 INFO L276 IsEmpty]: Start isEmpty. Operand 317 states and 437 transitions. [2020-10-14 17:47:57,287 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2020-10-14 17:47:57,288 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 17:47:57,288 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 17:47:57,288 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-14 17:47:57,288 INFO L427 AbstractCegarLoop]: === Iteration 18 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 17:47:57,288 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 17:47:57,288 INFO L82 PathProgramCache]: Analyzing trace with hash 661568367, now seen corresponding path program 15 times [2020-10-14 17:47:57,289 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 17:47:57,289 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1016361507] [2020-10-14 17:47:57,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 17:47:57,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:47:57,313 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:47:57,328 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:47:58,353 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:47:58,354 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 57 [2020-10-14 17:47:58,354 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 17:47:58,354 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1049 [2020-10-14 17:47:58,355 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:47:58,355 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:47:58,355 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-14 17:47:58,355 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 17:47:58,355 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-14 17:47:58,356 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 17:47:58,622 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 17:47:58,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:47:58,624 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:47:58,625 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:47:58,625 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 17:47:58,625 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 17:47:58,626 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 17:47:58,626 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:47:58,626 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:47:58,627 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 17:47:58,627 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 17:47:58,627 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 17:47:58,627 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 17:47:58,633 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 17:47:58,634 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1016361507] [2020-10-14 17:47:58,634 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 17:47:58,635 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-10-14 17:47:58,635 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1995200479] [2020-10-14 17:47:58,635 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-14 17:47:58,635 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 17:47:58,636 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-14 17:47:58,636 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=187, Unknown=0, NotChecked=0, Total=342 [2020-10-14 17:47:58,636 INFO L87 Difference]: Start difference. First operand 317 states and 437 transitions. Second operand 19 states. [2020-10-14 17:47:59,464 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 17:47:59,465 INFO L93 Difference]: Finished difference Result 635 states and 892 transitions. [2020-10-14 17:47:59,465 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-14 17:47:59,465 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 49 [2020-10-14 17:47:59,465 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 17:47:59,467 INFO L225 Difference]: With dead ends: 635 [2020-10-14 17:47:59,468 INFO L226 Difference]: Without dead ends: 355 [2020-10-14 17:47:59,469 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=155, Invalid=187, Unknown=0, NotChecked=0, Total=342 [2020-10-14 17:47:59,471 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 355 states. [2020-10-14 17:47:59,485 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 355 to 337. [2020-10-14 17:47:59,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 337 states. [2020-10-14 17:47:59,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 337 states to 337 states and 465 transitions. [2020-10-14 17:47:59,487 INFO L78 Accepts]: Start accepts. Automaton has 337 states and 465 transitions. Word has length 49 [2020-10-14 17:47:59,488 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 17:47:59,488 INFO L479 AbstractCegarLoop]: Abstraction has 337 states and 465 transitions. [2020-10-14 17:47:59,488 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-14 17:47:59,488 INFO L276 IsEmpty]: Start isEmpty. Operand 337 states and 465 transitions. [2020-10-14 17:47:59,488 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-10-14 17:47:59,489 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 17:47:59,489 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 17:47:59,489 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-14 17:47:59,489 INFO L427 AbstractCegarLoop]: === Iteration 19 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 17:47:59,489 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 17:47:59,489 INFO L82 PathProgramCache]: Analyzing trace with hash 622748109, now seen corresponding path program 16 times [2020-10-14 17:47:59,490 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 17:47:59,490 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [151001339] [2020-10-14 17:47:59,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 17:47:59,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:47:59,511 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:47:59,527 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:48:00,813 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:48:00,813 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 59 [2020-10-14 17:48:00,813 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 17:48:00,814 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1310 [2020-10-14 17:48:00,814 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:48:00,814 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:48:00,814 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-14 17:48:00,814 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 17:48:00,814 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 34 [2020-10-14 17:48:00,815 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:48:01,017 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 17:48:01,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:48:01,018 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:48:01,020 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:48:01,020 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 17:48:01,020 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 17:48:01,020 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 17:48:01,020 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:48:01,020 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:48:01,021 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 17:48:01,021 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 17:48:01,021 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 17:48:01,021 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:48:01,025 INFO L134 CoverageAnalysis]: Checked inductivity of 256 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 17:48:01,025 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [151001339] [2020-10-14 17:48:01,026 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 17:48:01,026 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-10-14 17:48:01,026 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2024276097] [2020-10-14 17:48:01,027 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-14 17:48:01,028 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 17:48:01,028 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-14 17:48:01,028 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=207, Unknown=0, NotChecked=0, Total=380 [2020-10-14 17:48:01,028 INFO L87 Difference]: Start difference. First operand 337 states and 465 transitions. Second operand 20 states. [2020-10-14 17:48:01,738 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 17:48:01,739 INFO L93 Difference]: Finished difference Result 673 states and 946 transitions. [2020-10-14 17:48:01,739 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-14 17:48:01,739 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 51 [2020-10-14 17:48:01,740 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 17:48:01,742 INFO L225 Difference]: With dead ends: 673 [2020-10-14 17:48:01,742 INFO L226 Difference]: Without dead ends: 375 [2020-10-14 17:48:01,743 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=173, Invalid=207, Unknown=0, NotChecked=0, Total=380 [2020-10-14 17:48:01,744 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 375 states. [2020-10-14 17:48:01,762 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 375 to 357. [2020-10-14 17:48:01,762 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 357 states. [2020-10-14 17:48:01,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 357 states to 357 states and 493 transitions. [2020-10-14 17:48:01,764 INFO L78 Accepts]: Start accepts. Automaton has 357 states and 493 transitions. Word has length 51 [2020-10-14 17:48:01,765 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 17:48:01,765 INFO L479 AbstractCegarLoop]: Abstraction has 357 states and 493 transitions. [2020-10-14 17:48:01,765 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-14 17:48:01,765 INFO L276 IsEmpty]: Start isEmpty. Operand 357 states and 493 transitions. [2020-10-14 17:48:01,765 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-10-14 17:48:01,766 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 17:48:01,766 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 17:48:01,766 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-14 17:48:01,766 INFO L427 AbstractCegarLoop]: === Iteration 20 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 17:48:01,766 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 17:48:01,766 INFO L82 PathProgramCache]: Analyzing trace with hash 1971185835, now seen corresponding path program 17 times [2020-10-14 17:48:01,767 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 17:48:01,767 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1262237597] [2020-10-14 17:48:01,767 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 17:48:01,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:48:01,792 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:48:01,805 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:48:02,943 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:48:02,944 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 61 [2020-10-14 17:48:02,944 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 17:48:02,944 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1160 [2020-10-14 17:48:02,944 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:48:02,944 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:48:02,945 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 19 [2020-10-14 17:48:02,945 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 17:48:02,945 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 36 [2020-10-14 17:48:02,945 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:48:03,185 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 17:48:03,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:48:03,187 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:48:03,188 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:48:03,188 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 17:48:03,188 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 17:48:03,189 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 17:48:03,189 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:48:03,189 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:48:03,189 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 17:48:03,189 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 17:48:03,190 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 17:48:03,190 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:48:03,194 INFO L134 CoverageAnalysis]: Checked inductivity of 289 backedges. 0 proven. 289 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 17:48:03,195 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1262237597] [2020-10-14 17:48:03,195 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 17:48:03,195 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-10-14 17:48:03,195 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2019316991] [2020-10-14 17:48:03,196 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-14 17:48:03,196 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 17:48:03,196 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-14 17:48:03,196 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=192, Invalid=228, Unknown=0, NotChecked=0, Total=420 [2020-10-14 17:48:03,197 INFO L87 Difference]: Start difference. First operand 357 states and 493 transitions. Second operand 21 states. [2020-10-14 17:48:03,969 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 17:48:03,969 INFO L93 Difference]: Finished difference Result 711 states and 1000 transitions. [2020-10-14 17:48:03,969 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-14 17:48:03,969 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 53 [2020-10-14 17:48:03,970 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 17:48:03,973 INFO L225 Difference]: With dead ends: 711 [2020-10-14 17:48:03,974 INFO L226 Difference]: Without dead ends: 395 [2020-10-14 17:48:03,975 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 17:48:03,976 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 395 states. [2020-10-14 17:48:03,990 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 395 to 377. [2020-10-14 17:48:03,991 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 377 states. [2020-10-14 17:48:03,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 377 states to 377 states and 521 transitions. [2020-10-14 17:48:03,994 INFO L78 Accepts]: Start accepts. Automaton has 377 states and 521 transitions. Word has length 53 [2020-10-14 17:48:03,994 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 17:48:03,994 INFO L479 AbstractCegarLoop]: Abstraction has 377 states and 521 transitions. [2020-10-14 17:48:03,994 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-14 17:48:03,994 INFO L276 IsEmpty]: Start isEmpty. Operand 377 states and 521 transitions. [2020-10-14 17:48:03,995 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-10-14 17:48:03,995 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 17:48:03,995 INFO L422 BasicCegarLoop]: trace histogram [18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 17:48:03,995 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-10-14 17:48:03,996 INFO L427 AbstractCegarLoop]: === Iteration 21 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 17:48:03,996 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 17:48:03,996 INFO L82 PathProgramCache]: Analyzing trace with hash 739717129, now seen corresponding path program 18 times [2020-10-14 17:48:03,996 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 17:48:03,996 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1648972035] [2020-10-14 17:48:03,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 17:48:04,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:48:04,016 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:48:04,030 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:48:05,341 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:48:05,342 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 63 [2020-10-14 17:48:05,342 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 17:48:05,342 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1332 [2020-10-14 17:48:05,343 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:48:05,343 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:48:05,343 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-10-14 17:48:05,344 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 17:48:05,344 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 38 [2020-10-14 17:48:05,344 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 17:48:05,581 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 17:48:05,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:48:05,583 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:48:05,585 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:48:05,585 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 17:48:05,585 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 17:48:05,586 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-14 17:48:05,586 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:48:05,586 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:48:05,586 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 17:48:05,587 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 17:48:05,587 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 17:48:05,587 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 17:48:05,592 INFO L134 CoverageAnalysis]: Checked inductivity of 324 backedges. 0 proven. 324 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 17:48:05,593 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1648972035] [2020-10-14 17:48:05,593 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 17:48:05,593 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-10-14 17:48:05,593 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [626448168] [2020-10-14 17:48:05,594 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-14 17:48:05,594 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 17:48:05,594 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-14 17:48:05,595 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=212, Invalid=250, Unknown=0, NotChecked=0, Total=462 [2020-10-14 17:48:05,595 INFO L87 Difference]: Start difference. First operand 377 states and 521 transitions. Second operand 22 states. [2020-10-14 17:48:06,441 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 17:48:06,441 INFO L93 Difference]: Finished difference Result 749 states and 1054 transitions. [2020-10-14 17:48:06,441 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-14 17:48:06,442 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 55 [2020-10-14 17:48:06,442 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 17:48:06,444 INFO L225 Difference]: With dead ends: 749 [2020-10-14 17:48:06,444 INFO L226 Difference]: Without dead ends: 415 [2020-10-14 17:48:06,447 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 17:48:06,448 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 415 states. [2020-10-14 17:48:06,464 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 415 to 397. [2020-10-14 17:48:06,465 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 397 states. [2020-10-14 17:48:06,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 397 states to 397 states and 549 transitions. [2020-10-14 17:48:06,467 INFO L78 Accepts]: Start accepts. Automaton has 397 states and 549 transitions. Word has length 55 [2020-10-14 17:48:06,467 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 17:48:06,467 INFO L479 AbstractCegarLoop]: Abstraction has 397 states and 549 transitions. [2020-10-14 17:48:06,467 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-14 17:48:06,467 INFO L276 IsEmpty]: Start isEmpty. Operand 397 states and 549 transitions. [2020-10-14 17:48:06,470 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-10-14 17:48:06,470 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 17:48:06,470 INFO L422 BasicCegarLoop]: trace histogram [19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 17:48:06,470 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-10-14 17:48:06,471 INFO L427 AbstractCegarLoop]: === Iteration 22 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 17:48:06,471 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 17:48:06,471 INFO L82 PathProgramCache]: Analyzing trace with hash -1585702937, now seen corresponding path program 19 times [2020-10-14 17:48:06,471 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 17:48:06,473 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1484331506] [2020-10-14 17:48:06,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 17:48:06,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:48:06,498 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:48:06,513 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:48:07,947 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:48:07,947 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 65 [2020-10-14 17:48:07,947 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 17:48:07,948 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1456 [2020-10-14 17:48:07,948 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:48:07,948 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:48:07,948 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 21 [2020-10-14 17:48:07,948 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 17:48:07,948 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 40 [2020-10-14 17:48:07,949 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:48:08,239 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 17:48:08,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:48:08,242 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:48:08,243 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:48:08,243 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 17:48:08,244 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 17:48:08,244 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 17:48:08,244 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:48:08,244 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:48:08,244 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 17:48:08,245 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 17:48:08,245 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 17:48:08,245 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:48:08,249 INFO L134 CoverageAnalysis]: Checked inductivity of 361 backedges. 0 proven. 361 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 17:48:08,250 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1484331506] [2020-10-14 17:48:08,250 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 17:48:08,250 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-10-14 17:48:08,250 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1265869365] [2020-10-14 17:48:08,251 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-14 17:48:08,251 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 17:48:08,251 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-14 17:48:08,251 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=233, Invalid=273, Unknown=0, NotChecked=0, Total=506 [2020-10-14 17:48:08,252 INFO L87 Difference]: Start difference. First operand 397 states and 549 transitions. Second operand 23 states. [2020-10-14 17:48:09,214 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 17:48:09,215 INFO L93 Difference]: Finished difference Result 787 states and 1108 transitions. [2020-10-14 17:48:09,215 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-14 17:48:09,215 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 57 [2020-10-14 17:48:09,215 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 17:48:09,218 INFO L225 Difference]: With dead ends: 787 [2020-10-14 17:48:09,218 INFO L226 Difference]: Without dead ends: 435 [2020-10-14 17:48:09,220 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 17:48:09,221 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 435 states. [2020-10-14 17:48:09,238 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 435 to 417. [2020-10-14 17:48:09,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 417 states. [2020-10-14 17:48:09,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 417 states to 417 states and 577 transitions. [2020-10-14 17:48:09,241 INFO L78 Accepts]: Start accepts. Automaton has 417 states and 577 transitions. Word has length 57 [2020-10-14 17:48:09,241 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 17:48:09,241 INFO L479 AbstractCegarLoop]: Abstraction has 417 states and 577 transitions. [2020-10-14 17:48:09,241 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-14 17:48:09,241 INFO L276 IsEmpty]: Start isEmpty. Operand 417 states and 577 transitions. [2020-10-14 17:48:09,242 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2020-10-14 17:48:09,242 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 17:48:09,242 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 17:48:09,242 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-10-14 17:48:09,242 INFO L427 AbstractCegarLoop]: === Iteration 23 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 17:48:09,242 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 17:48:09,243 INFO L82 PathProgramCache]: Analyzing trace with hash 1363574853, now seen corresponding path program 20 times [2020-10-14 17:48:09,243 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 17:48:09,243 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1336241174] [2020-10-14 17:48:09,243 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 17:48:09,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:48:09,263 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:48:09,277 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:48:10,561 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:48:10,561 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 67 [2020-10-14 17:48:10,561 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 17:48:10,561 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1306 [2020-10-14 17:48:10,561 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:48:10,562 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:48:10,562 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 22 [2020-10-14 17:48:10,562 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 17:48:10,562 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 42 [2020-10-14 17:48:10,562 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:48:10,923 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 17:48:10,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:48:10,925 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:48:10,927 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:48:10,927 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 17:48:10,927 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 17:48:10,928 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 17:48:10,929 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:48:10,929 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:48:10,930 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 17:48:10,930 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 17:48:10,930 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 17:48:10,930 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 17:48:10,939 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 0 proven. 400 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 17:48:10,943 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1336241174] [2020-10-14 17:48:10,948 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 17:48:10,949 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2020-10-14 17:48:10,950 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1350359612] [2020-10-14 17:48:10,951 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-14 17:48:10,951 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 17:48:10,952 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-14 17:48:10,952 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=255, Invalid=297, Unknown=0, NotChecked=0, Total=552 [2020-10-14 17:48:10,952 INFO L87 Difference]: Start difference. First operand 417 states and 577 transitions. Second operand 24 states. [2020-10-14 17:48:11,789 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 17:48:11,790 INFO L93 Difference]: Finished difference Result 825 states and 1162 transitions. [2020-10-14 17:48:11,790 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-14 17:48:11,790 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 59 [2020-10-14 17:48:11,790 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 17:48:11,792 INFO L225 Difference]: With dead ends: 825 [2020-10-14 17:48:11,792 INFO L226 Difference]: Without dead ends: 455 [2020-10-14 17:48:11,794 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=255, Invalid=297, Unknown=0, NotChecked=0, Total=552 [2020-10-14 17:48:11,795 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 455 states. [2020-10-14 17:48:11,819 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 455 to 437. [2020-10-14 17:48:11,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 437 states. [2020-10-14 17:48:11,822 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 437 states to 437 states and 605 transitions. [2020-10-14 17:48:11,822 INFO L78 Accepts]: Start accepts. Automaton has 437 states and 605 transitions. Word has length 59 [2020-10-14 17:48:11,822 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 17:48:11,823 INFO L479 AbstractCegarLoop]: Abstraction has 437 states and 605 transitions. [2020-10-14 17:48:11,823 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-14 17:48:11,823 INFO L276 IsEmpty]: Start isEmpty. Operand 437 states and 605 transitions. [2020-10-14 17:48:11,823 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-10-14 17:48:11,823 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 17:48:11,824 INFO L422 BasicCegarLoop]: trace histogram [21, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 17:48:11,824 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-10-14 17:48:11,824 INFO L427 AbstractCegarLoop]: === Iteration 24 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 17:48:11,824 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 17:48:11,824 INFO L82 PathProgramCache]: Analyzing trace with hash 941115683, now seen corresponding path program 21 times [2020-10-14 17:48:11,825 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 17:48:11,825 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [845048895] [2020-10-14 17:48:11,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 17:48:11,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:48:11,846 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:48:11,884 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:48:13,124 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:48:13,125 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 69 [2020-10-14 17:48:13,125 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 17:48:13,125 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1286 [2020-10-14 17:48:13,125 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:48:13,125 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:48:13,125 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 23 [2020-10-14 17:48:13,125 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 17:48:13,126 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 44 [2020-10-14 17:48:13,126 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:48:13,519 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 17:48:13,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:48:13,521 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:48:13,522 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:48:13,523 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 17:48:13,523 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 17:48:13,523 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 17:48:13,524 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:48:13,524 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:48:13,524 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 17:48:13,525 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 17:48:13,525 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 17:48:13,525 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 17:48:13,534 INFO L134 CoverageAnalysis]: Checked inductivity of 441 backedges. 0 proven. 441 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 17:48:13,534 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [845048895] [2020-10-14 17:48:13,535 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 17:48:13,535 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2020-10-14 17:48:13,535 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1289545534] [2020-10-14 17:48:13,536 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-14 17:48:13,536 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 17:48:13,536 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-14 17:48:13,537 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=278, Invalid=322, Unknown=0, NotChecked=0, Total=600 [2020-10-14 17:48:13,537 INFO L87 Difference]: Start difference. First operand 437 states and 605 transitions. Second operand 25 states. [2020-10-14 17:48:14,574 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 17:48:14,574 INFO L93 Difference]: Finished difference Result 863 states and 1216 transitions. [2020-10-14 17:48:14,575 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-14 17:48:14,575 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 61 [2020-10-14 17:48:14,575 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 17:48:14,577 INFO L225 Difference]: With dead ends: 863 [2020-10-14 17:48:14,577 INFO L226 Difference]: Without dead ends: 475 [2020-10-14 17:48:14,579 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 17:48:14,579 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 475 states. [2020-10-14 17:48:14,598 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 475 to 457. [2020-10-14 17:48:14,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 457 states. [2020-10-14 17:48:14,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 457 states to 457 states and 633 transitions. [2020-10-14 17:48:14,601 INFO L78 Accepts]: Start accepts. Automaton has 457 states and 633 transitions. Word has length 61 [2020-10-14 17:48:14,601 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 17:48:14,601 INFO L479 AbstractCegarLoop]: Abstraction has 457 states and 633 transitions. [2020-10-14 17:48:14,601 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-14 17:48:14,602 INFO L276 IsEmpty]: Start isEmpty. Operand 457 states and 633 transitions. [2020-10-14 17:48:14,602 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-10-14 17:48:14,602 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 17:48:14,602 INFO L422 BasicCegarLoop]: trace histogram [22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 17:48:14,602 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-10-14 17:48:14,603 INFO L427 AbstractCegarLoop]: === Iteration 25 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 17:48:14,603 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 17:48:14,603 INFO L82 PathProgramCache]: Analyzing trace with hash -1315220863, now seen corresponding path program 22 times [2020-10-14 17:48:14,603 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 17:48:14,603 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1308389473] [2020-10-14 17:48:14,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 17:48:14,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:48:14,624 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:48:14,662 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:48:15,712 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:48:15,712 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 71 [2020-10-14 17:48:15,713 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 17:48:15,713 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1096 [2020-10-14 17:48:15,713 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:48:15,713 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:48:15,713 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 24 [2020-10-14 17:48:15,713 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 17:48:15,713 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 46 [2020-10-14 17:48:15,713 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:48:16,033 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 17:48:16,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:48:16,035 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:48:16,037 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:48:16,037 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 17:48:16,037 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 17:48:16,037 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-14 17:48:16,037 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:48:16,038 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:48:16,038 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 17:48:16,038 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 17:48:16,038 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 17:48:16,038 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:48:16,045 INFO L134 CoverageAnalysis]: Checked inductivity of 484 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 17:48:16,045 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1308389473] [2020-10-14 17:48:16,046 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 17:48:16,046 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2020-10-14 17:48:16,046 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1778701737] [2020-10-14 17:48:16,047 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-10-14 17:48:16,047 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 17:48:16,047 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-10-14 17:48:16,048 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=302, Invalid=348, Unknown=0, NotChecked=0, Total=650 [2020-10-14 17:48:16,048 INFO L87 Difference]: Start difference. First operand 457 states and 633 transitions. Second operand 26 states. [2020-10-14 17:48:17,145 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 17:48:17,146 INFO L93 Difference]: Finished difference Result 901 states and 1270 transitions. [2020-10-14 17:48:17,146 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-14 17:48:17,146 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 63 [2020-10-14 17:48:17,146 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 17:48:17,149 INFO L225 Difference]: With dead ends: 901 [2020-10-14 17:48:17,149 INFO L226 Difference]: Without dead ends: 495 [2020-10-14 17:48:17,151 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=302, Invalid=348, Unknown=0, NotChecked=0, Total=650 [2020-10-14 17:48:17,152 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 495 states. [2020-10-14 17:48:17,173 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 495 to 477. [2020-10-14 17:48:17,173 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 477 states. [2020-10-14 17:48:17,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 477 states to 477 states and 661 transitions. [2020-10-14 17:48:17,176 INFO L78 Accepts]: Start accepts. Automaton has 477 states and 661 transitions. Word has length 63 [2020-10-14 17:48:17,176 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 17:48:17,176 INFO L479 AbstractCegarLoop]: Abstraction has 477 states and 661 transitions. [2020-10-14 17:48:17,176 INFO L480 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-10-14 17:48:17,176 INFO L276 IsEmpty]: Start isEmpty. Operand 477 states and 661 transitions. [2020-10-14 17:48:17,177 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-10-14 17:48:17,177 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 17:48:17,177 INFO L422 BasicCegarLoop]: trace histogram [23, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 17:48:17,177 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-10-14 17:48:17,178 INFO L427 AbstractCegarLoop]: === Iteration 26 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 17:48:17,178 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 17:48:17,178 INFO L82 PathProgramCache]: Analyzing trace with hash -696157089, now seen corresponding path program 23 times [2020-10-14 17:48:17,178 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 17:48:17,178 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [520903977] [2020-10-14 17:48:17,179 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 17:48:17,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:48:17,221 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:48:17,258 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:48:18,245 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:48:18,245 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 73 [2020-10-14 17:48:18,245 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 17:48:18,245 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1033 [2020-10-14 17:48:18,245 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:48:18,246 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:48:18,246 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 25 [2020-10-14 17:48:18,246 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 17:48:18,246 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 48 [2020-10-14 17:48:18,246 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:48:18,618 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 17:48:18,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:48:18,620 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:48:18,621 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:48:18,621 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 17:48:18,621 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 17:48:18,621 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 17:48:18,622 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:48:18,622 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:48:18,622 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 17:48:18,622 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 17:48:18,622 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 17:48:18,622 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:48:18,626 INFO L134 CoverageAnalysis]: Checked inductivity of 529 backedges. 0 proven. 529 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 17:48:18,626 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [520903977] [2020-10-14 17:48:18,626 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 17:48:18,626 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2020-10-14 17:48:18,626 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [717960064] [2020-10-14 17:48:18,627 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-10-14 17:48:18,627 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 17:48:18,628 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-10-14 17:48:18,628 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=327, Invalid=375, Unknown=0, NotChecked=0, Total=702 [2020-10-14 17:48:18,628 INFO L87 Difference]: Start difference. First operand 477 states and 661 transitions. Second operand 27 states. [2020-10-14 17:48:19,783 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 17:48:19,783 INFO L93 Difference]: Finished difference Result 939 states and 1324 transitions. [2020-10-14 17:48:19,783 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-14 17:48:19,784 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 65 [2020-10-14 17:48:19,784 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 17:48:19,787 INFO L225 Difference]: With dead ends: 939 [2020-10-14 17:48:19,787 INFO L226 Difference]: Without dead ends: 515 [2020-10-14 17:48:19,789 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 17:48:19,790 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 515 states. [2020-10-14 17:48:19,830 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 515 to 497. [2020-10-14 17:48:19,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 497 states. [2020-10-14 17:48:19,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 497 states to 497 states and 689 transitions. [2020-10-14 17:48:19,833 INFO L78 Accepts]: Start accepts. Automaton has 497 states and 689 transitions. Word has length 65 [2020-10-14 17:48:19,833 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 17:48:19,833 INFO L479 AbstractCegarLoop]: Abstraction has 497 states and 689 transitions. [2020-10-14 17:48:19,834 INFO L480 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-10-14 17:48:19,834 INFO L276 IsEmpty]: Start isEmpty. Operand 497 states and 689 transitions. [2020-10-14 17:48:19,834 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-10-14 17:48:19,834 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 17:48:19,834 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 17:48:19,835 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-10-14 17:48:19,835 INFO L427 AbstractCegarLoop]: === Iteration 27 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 17:48:19,836 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 17:48:19,836 INFO L82 PathProgramCache]: Analyzing trace with hash 1518642877, now seen corresponding path program 24 times [2020-10-14 17:48:19,836 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 17:48:19,837 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [477353459] [2020-10-14 17:48:19,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 17:48:19,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:48:19,859 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:48:19,907 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:48:21,078 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:48:21,078 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 75 [2020-10-14 17:48:21,078 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 17:48:21,078 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1227 [2020-10-14 17:48:21,078 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:48:21,078 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:48:21,078 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 26 [2020-10-14 17:48:21,079 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 17:48:21,079 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 50 [2020-10-14 17:48:21,079 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:48:21,483 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 17:48:21,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:48:21,485 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:48:21,486 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:48:21,487 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 17:48:21,487 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 17:48:21,487 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 17:48:21,487 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:48:21,487 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:48:21,487 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 17:48:21,488 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 17:48:21,488 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 17:48:21,488 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:48:21,492 INFO L134 CoverageAnalysis]: Checked inductivity of 576 backedges. 0 proven. 576 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 17:48:21,492 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [477353459] [2020-10-14 17:48:21,492 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 17:48:21,492 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2020-10-14 17:48:21,492 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [448616667] [2020-10-14 17:48:21,493 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-10-14 17:48:21,493 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 17:48:21,493 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-10-14 17:48:21,493 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=353, Invalid=403, Unknown=0, NotChecked=0, Total=756 [2020-10-14 17:48:21,494 INFO L87 Difference]: Start difference. First operand 497 states and 689 transitions. Second operand 28 states. [2020-10-14 17:48:22,703 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 17:48:22,703 INFO L93 Difference]: Finished difference Result 977 states and 1378 transitions. [2020-10-14 17:48:22,703 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-14 17:48:22,703 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 67 [2020-10-14 17:48:22,704 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 17:48:22,707 INFO L225 Difference]: With dead ends: 977 [2020-10-14 17:48:22,707 INFO L226 Difference]: Without dead ends: 535 [2020-10-14 17:48:22,709 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 17:48:22,709 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 535 states. [2020-10-14 17:48:22,730 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 535 to 517. [2020-10-14 17:48:22,730 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 517 states. [2020-10-14 17:48:22,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 517 states to 517 states and 717 transitions. [2020-10-14 17:48:22,733 INFO L78 Accepts]: Start accepts. Automaton has 517 states and 717 transitions. Word has length 67 [2020-10-14 17:48:22,733 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 17:48:22,733 INFO L479 AbstractCegarLoop]: Abstraction has 517 states and 717 transitions. [2020-10-14 17:48:22,733 INFO L480 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-10-14 17:48:22,733 INFO L276 IsEmpty]: Start isEmpty. Operand 517 states and 717 transitions. [2020-10-14 17:48:22,734 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2020-10-14 17:48:22,734 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 17:48:22,734 INFO L422 BasicCegarLoop]: trace histogram [25, 25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 17:48:22,734 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-10-14 17:48:22,734 INFO L427 AbstractCegarLoop]: === Iteration 28 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 17:48:22,734 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 17:48:22,735 INFO L82 PathProgramCache]: Analyzing trace with hash -362368613, now seen corresponding path program 25 times [2020-10-14 17:48:22,735 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 17:48:22,735 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1539341466] [2020-10-14 17:48:22,735 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 17:48:22,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:48:22,755 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:48:22,798 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:48:24,147 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:48:24,147 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 77 [2020-10-14 17:48:24,147 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 17:48:24,147 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1399 [2020-10-14 17:48:24,148 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:48:24,148 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:48:24,148 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 27 [2020-10-14 17:48:24,148 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 17:48:24,148 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 52 [2020-10-14 17:48:24,148 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:48:24,564 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 17:48:24,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:48:24,566 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:48:24,567 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:48:24,567 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 17:48:24,567 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 17:48:24,567 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 17:48:24,567 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:48:24,567 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:48:24,567 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 17:48:24,568 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 17:48:24,568 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 17:48:24,568 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:48:24,572 INFO L134 CoverageAnalysis]: Checked inductivity of 625 backedges. 0 proven. 625 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 17:48:24,572 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1539341466] [2020-10-14 17:48:24,572 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 17:48:24,572 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29] total 29 [2020-10-14 17:48:24,572 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1913981258] [2020-10-14 17:48:24,573 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-10-14 17:48:24,573 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 17:48:24,573 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-10-14 17:48:24,573 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=380, Invalid=432, Unknown=0, NotChecked=0, Total=812 [2020-10-14 17:48:24,573 INFO L87 Difference]: Start difference. First operand 517 states and 717 transitions. Second operand 29 states. [2020-10-14 17:48:26,068 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 17:48:26,069 INFO L93 Difference]: Finished difference Result 1015 states and 1432 transitions. [2020-10-14 17:48:26,069 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-14 17:48:26,069 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 69 [2020-10-14 17:48:26,070 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 17:48:26,072 INFO L225 Difference]: With dead ends: 1015 [2020-10-14 17:48:26,073 INFO L226 Difference]: Without dead ends: 555 [2020-10-14 17:48:26,074 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=380, Invalid=432, Unknown=0, NotChecked=0, Total=812 [2020-10-14 17:48:26,075 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 555 states. [2020-10-14 17:48:26,097 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 555 to 537. [2020-10-14 17:48:26,097 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 537 states. [2020-10-14 17:48:26,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 537 states to 537 states and 745 transitions. [2020-10-14 17:48:26,099 INFO L78 Accepts]: Start accepts. Automaton has 537 states and 745 transitions. Word has length 69 [2020-10-14 17:48:26,099 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 17:48:26,099 INFO L479 AbstractCegarLoop]: Abstraction has 537 states and 745 transitions. [2020-10-14 17:48:26,100 INFO L480 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-10-14 17:48:26,100 INFO L276 IsEmpty]: Start isEmpty. Operand 537 states and 745 transitions. [2020-10-14 17:48:26,100 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2020-10-14 17:48:26,100 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 17:48:26,100 INFO L422 BasicCegarLoop]: trace histogram [26, 26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 17:48:26,101 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2020-10-14 17:48:26,101 INFO L427 AbstractCegarLoop]: === Iteration 29 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 17:48:26,101 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 17:48:26,101 INFO L82 PathProgramCache]: Analyzing trace with hash 166821113, now seen corresponding path program 26 times [2020-10-14 17:48:26,101 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 17:48:26,101 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2089358562] [2020-10-14 17:48:26,102 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 17:48:26,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:48:26,125 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:48:26,138 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:48:27,683 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:48:27,684 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 79 [2020-10-14 17:48:27,684 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 17:48:27,684 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1568 [2020-10-14 17:48:27,684 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:48:27,684 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:48:27,684 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 28 [2020-10-14 17:48:27,685 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 17:48:27,685 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 54 [2020-10-14 17:48:27,685 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:48:28,132 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 17:48:28,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:48:28,134 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:48:28,135 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:48:28,136 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 17:48:28,136 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 17:48:28,136 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 17:48:28,136 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:48:28,136 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:48:28,136 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 17:48:28,137 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 17:48:28,137 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 17:48:28,137 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:48:28,142 INFO L134 CoverageAnalysis]: Checked inductivity of 676 backedges. 0 proven. 676 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 17:48:28,142 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2089358562] [2020-10-14 17:48:28,143 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 17:48:28,143 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30] total 30 [2020-10-14 17:48:28,143 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1967203427] [2020-10-14 17:48:28,143 INFO L459 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-10-14 17:48:28,143 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 17:48:28,144 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-10-14 17:48:28,144 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=408, Invalid=462, Unknown=0, NotChecked=0, Total=870 [2020-10-14 17:48:28,144 INFO L87 Difference]: Start difference. First operand 537 states and 745 transitions. Second operand 30 states. [2020-10-14 17:48:29,295 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 17:48:29,295 INFO L93 Difference]: Finished difference Result 1053 states and 1486 transitions. [2020-10-14 17:48:29,298 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-10-14 17:48:29,298 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 71 [2020-10-14 17:48:29,298 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 17:48:29,301 INFO L225 Difference]: With dead ends: 1053 [2020-10-14 17:48:29,302 INFO L226 Difference]: Without dead ends: 575 [2020-10-14 17:48:29,304 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=408, Invalid=462, Unknown=0, NotChecked=0, Total=870 [2020-10-14 17:48:29,304 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 575 states. [2020-10-14 17:48:29,327 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 575 to 557. [2020-10-14 17:48:29,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 557 states. [2020-10-14 17:48:29,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 557 states to 557 states and 773 transitions. [2020-10-14 17:48:29,330 INFO L78 Accepts]: Start accepts. Automaton has 557 states and 773 transitions. Word has length 71 [2020-10-14 17:48:29,330 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 17:48:29,330 INFO L479 AbstractCegarLoop]: Abstraction has 557 states and 773 transitions. [2020-10-14 17:48:29,330 INFO L480 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-10-14 17:48:29,330 INFO L276 IsEmpty]: Start isEmpty. Operand 557 states and 773 transitions. [2020-10-14 17:48:29,331 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2020-10-14 17:48:29,331 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 17:48:29,331 INFO L422 BasicCegarLoop]: trace histogram [27, 27, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 17:48:29,331 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2020-10-14 17:48:29,332 INFO L427 AbstractCegarLoop]: === Iteration 30 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 17:48:29,332 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 17:48:29,332 INFO L82 PathProgramCache]: Analyzing trace with hash 1912006871, now seen corresponding path program 27 times [2020-10-14 17:48:29,332 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 17:48:29,332 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [185368741] [2020-10-14 17:48:29,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 17:48:29,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:48:29,356 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:48:29,375 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:48:31,056 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:48:31,057 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 81 [2020-10-14 17:48:31,057 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 17:48:31,057 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1710 [2020-10-14 17:48:31,057 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:48:31,057 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:48:31,057 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 29 [2020-10-14 17:48:31,057 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 17:48:31,057 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 56 [2020-10-14 17:48:31,057 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:48:31,527 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 17:48:31,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:48:31,529 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:48:31,530 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:48:31,530 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 17:48:31,531 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 17:48:31,531 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 17:48:31,531 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:48:31,532 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:48:31,532 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 17:48:31,532 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 17:48:31,533 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 17:48:31,533 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 17:48:31,543 INFO L134 CoverageAnalysis]: Checked inductivity of 729 backedges. 0 proven. 729 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 17:48:31,545 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [185368741] [2020-10-14 17:48:31,545 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 17:48:31,545 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31] total 31 [2020-10-14 17:48:31,546 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [378199861] [2020-10-14 17:48:31,546 INFO L459 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-10-14 17:48:31,546 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 17:48:31,547 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-10-14 17:48:31,547 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=437, Invalid=493, Unknown=0, NotChecked=0, Total=930 [2020-10-14 17:48:31,548 INFO L87 Difference]: Start difference. First operand 557 states and 773 transitions. Second operand 31 states. [2020-10-14 17:48:33,048 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 17:48:33,048 INFO L93 Difference]: Finished difference Result 1091 states and 1540 transitions. [2020-10-14 17:48:33,048 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-14 17:48:33,048 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 73 [2020-10-14 17:48:33,049 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 17:48:33,052 INFO L225 Difference]: With dead ends: 1091 [2020-10-14 17:48:33,052 INFO L226 Difference]: Without dead ends: 595 [2020-10-14 17:48:33,056 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=437, Invalid=493, Unknown=0, NotChecked=0, Total=930 [2020-10-14 17:48:33,057 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 595 states. [2020-10-14 17:48:33,083 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 595 to 577. [2020-10-14 17:48:33,084 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 577 states. [2020-10-14 17:48:33,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 577 states to 577 states and 801 transitions. [2020-10-14 17:48:33,086 INFO L78 Accepts]: Start accepts. Automaton has 577 states and 801 transitions. Word has length 73 [2020-10-14 17:48:33,086 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 17:48:33,087 INFO L479 AbstractCegarLoop]: Abstraction has 577 states and 801 transitions. [2020-10-14 17:48:33,087 INFO L480 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-10-14 17:48:33,087 INFO L276 IsEmpty]: Start isEmpty. Operand 577 states and 801 transitions. [2020-10-14 17:48:33,087 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2020-10-14 17:48:33,087 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 17:48:33,088 INFO L422 BasicCegarLoop]: trace histogram [28, 28, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 17:48:33,088 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2020-10-14 17:48:33,088 INFO L427 AbstractCegarLoop]: === Iteration 31 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 17:48:33,088 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 17:48:33,088 INFO L82 PathProgramCache]: Analyzing trace with hash -296692427, now seen corresponding path program 28 times [2020-10-14 17:48:33,089 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 17:48:33,089 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1895257623] [2020-10-14 17:48:33,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 17:48:33,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:48:33,115 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:48:33,137 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:48:35,189 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:48:35,189 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 83 [2020-10-14 17:48:35,189 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 17:48:35,189 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2084 [2020-10-14 17:48:35,189 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:48:35,189 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:48:35,190 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 30 [2020-10-14 17:48:35,190 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 17:48:35,190 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 58 [2020-10-14 17:48:35,190 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:48:35,666 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 17:48:35,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:48:35,668 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:48:35,669 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:48:35,669 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 17:48:35,669 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 17:48:35,669 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 17:48:35,669 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:48:35,670 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:48:35,670 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 17:48:35,670 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 17:48:35,670 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 17:48:35,670 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:48:35,677 INFO L134 CoverageAnalysis]: Checked inductivity of 784 backedges. 0 proven. 784 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 17:48:35,677 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1895257623] [2020-10-14 17:48:35,677 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 17:48:35,677 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32] total 32 [2020-10-14 17:48:35,677 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [464564175] [2020-10-14 17:48:35,678 INFO L459 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-10-14 17:48:35,678 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 17:48:35,678 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-10-14 17:48:35,679 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=467, Invalid=525, Unknown=0, NotChecked=0, Total=992 [2020-10-14 17:48:35,679 INFO L87 Difference]: Start difference. First operand 577 states and 801 transitions. Second operand 32 states. [2020-10-14 17:48:37,199 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 17:48:37,200 INFO L93 Difference]: Finished difference Result 1129 states and 1594 transitions. [2020-10-14 17:48:37,200 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-10-14 17:48:37,200 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 75 [2020-10-14 17:48:37,200 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 17:48:37,205 INFO L225 Difference]: With dead ends: 1129 [2020-10-14 17:48:37,205 INFO L226 Difference]: Without dead ends: 615 [2020-10-14 17:48:37,207 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=467, Invalid=525, Unknown=0, NotChecked=0, Total=992 [2020-10-14 17:48:37,209 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 615 states. [2020-10-14 17:48:37,235 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 615 to 597. [2020-10-14 17:48:37,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 597 states. [2020-10-14 17:48:37,237 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 597 states to 597 states and 829 transitions. [2020-10-14 17:48:37,237 INFO L78 Accepts]: Start accepts. Automaton has 597 states and 829 transitions. Word has length 75 [2020-10-14 17:48:37,237 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 17:48:37,238 INFO L479 AbstractCegarLoop]: Abstraction has 597 states and 829 transitions. [2020-10-14 17:48:37,238 INFO L480 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-10-14 17:48:37,238 INFO L276 IsEmpty]: Start isEmpty. Operand 597 states and 829 transitions. [2020-10-14 17:48:37,238 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2020-10-14 17:48:37,238 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 17:48:37,239 INFO L422 BasicCegarLoop]: trace histogram [29, 29, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 17:48:37,239 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2020-10-14 17:48:37,239 INFO L427 AbstractCegarLoop]: === Iteration 32 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 17:48:37,239 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 17:48:37,240 INFO L82 PathProgramCache]: Analyzing trace with hash -1142873581, now seen corresponding path program 29 times [2020-10-14 17:48:37,240 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 17:48:37,240 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1957203426] [2020-10-14 17:48:37,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 17:48:37,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:48:37,266 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:48:37,293 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:48:39,421 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:48:39,422 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 85 [2020-10-14 17:48:39,422 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 17:48:39,422 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2166 [2020-10-14 17:48:39,422 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:48:39,422 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:48:39,422 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 31 [2020-10-14 17:48:39,422 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 17:48:39,423 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 60 [2020-10-14 17:48:39,423 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:48:39,965 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 17:48:39,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:48:39,967 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:48:39,968 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:48:39,968 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 17:48:39,969 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 17:48:39,969 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 17:48:39,969 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:48:39,969 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:48:39,969 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 17:48:39,969 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 17:48:39,970 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 17:48:39,970 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:48:39,976 INFO L134 CoverageAnalysis]: Checked inductivity of 841 backedges. 0 proven. 841 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 17:48:39,976 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1957203426] [2020-10-14 17:48:39,976 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 17:48:39,976 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33] total 33 [2020-10-14 17:48:39,977 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1710219520] [2020-10-14 17:48:39,977 INFO L459 AbstractCegarLoop]: Interpolant automaton has 33 states [2020-10-14 17:48:39,977 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 17:48:39,977 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2020-10-14 17:48:39,978 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=498, Invalid=558, Unknown=0, NotChecked=0, Total=1056 [2020-10-14 17:48:39,978 INFO L87 Difference]: Start difference. First operand 597 states and 829 transitions. Second operand 33 states. [2020-10-14 17:48:41,368 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 17:48:41,368 INFO L93 Difference]: Finished difference Result 1167 states and 1648 transitions. [2020-10-14 17:48:41,368 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-10-14 17:48:41,369 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 77 [2020-10-14 17:48:41,369 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 17:48:41,371 INFO L225 Difference]: With dead ends: 1167 [2020-10-14 17:48:41,372 INFO L226 Difference]: Without dead ends: 635 [2020-10-14 17:48:41,374 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 17:48:41,374 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 635 states. [2020-10-14 17:48:41,400 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 635 to 617. [2020-10-14 17:48:41,400 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 617 states. [2020-10-14 17:48:41,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 617 states to 617 states and 857 transitions. [2020-10-14 17:48:41,403 INFO L78 Accepts]: Start accepts. Automaton has 617 states and 857 transitions. Word has length 77 [2020-10-14 17:48:41,403 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 17:48:41,403 INFO L479 AbstractCegarLoop]: Abstraction has 617 states and 857 transitions. [2020-10-14 17:48:41,403 INFO L480 AbstractCegarLoop]: Interpolant automaton has 33 states. [2020-10-14 17:48:41,403 INFO L276 IsEmpty]: Start isEmpty. Operand 617 states and 857 transitions. [2020-10-14 17:48:41,404 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2020-10-14 17:48:41,404 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 17:48:41,404 INFO L422 BasicCegarLoop]: trace histogram [30, 30, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 17:48:41,404 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2020-10-14 17:48:41,405 INFO L427 AbstractCegarLoop]: === Iteration 33 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 17:48:41,405 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 17:48:41,405 INFO L82 PathProgramCache]: Analyzing trace with hash 1720823665, now seen corresponding path program 30 times [2020-10-14 17:48:41,405 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 17:48:41,405 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1929753169] [2020-10-14 17:48:41,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 17:48:41,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:48:41,433 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:48:41,454 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:48:43,624 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:48:43,624 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 87 [2020-10-14 17:48:43,624 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 17:48:43,624 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2202 [2020-10-14 17:48:43,625 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:48:43,625 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:48:43,625 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 32 [2020-10-14 17:48:43,625 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 17:48:43,625 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 62 [2020-10-14 17:48:43,625 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:48:44,202 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 17:48:44,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:48:44,204 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:48:44,204 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:48:44,205 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 17:48:44,205 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 17:48:44,205 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 17:48:44,205 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:48:44,205 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:48:44,205 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 17:48:44,205 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 17:48:44,205 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 17:48:44,206 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:48:44,210 INFO L134 CoverageAnalysis]: Checked inductivity of 900 backedges. 0 proven. 900 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 17:48:44,211 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1929753169] [2020-10-14 17:48:44,211 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 17:48:44,211 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34] total 34 [2020-10-14 17:48:44,211 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2105117758] [2020-10-14 17:48:44,212 INFO L459 AbstractCegarLoop]: Interpolant automaton has 34 states [2020-10-14 17:48:44,212 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 17:48:44,212 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2020-10-14 17:48:44,212 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=530, Invalid=592, Unknown=0, NotChecked=0, Total=1122 [2020-10-14 17:48:44,213 INFO L87 Difference]: Start difference. First operand 617 states and 857 transitions. Second operand 34 states. [2020-10-14 17:48:45,984 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 17:48:45,984 INFO L93 Difference]: Finished difference Result 1205 states and 1702 transitions. [2020-10-14 17:48:45,984 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-10-14 17:48:45,985 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 79 [2020-10-14 17:48:45,985 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 17:48:45,988 INFO L225 Difference]: With dead ends: 1205 [2020-10-14 17:48:45,988 INFO L226 Difference]: Without dead ends: 655 [2020-10-14 17:48:45,991 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 17:48:45,992 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 655 states. [2020-10-14 17:48:46,023 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 655 to 637. [2020-10-14 17:48:46,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 637 states. [2020-10-14 17:48:46,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 637 states to 637 states and 885 transitions. [2020-10-14 17:48:46,032 INFO L78 Accepts]: Start accepts. Automaton has 637 states and 885 transitions. Word has length 79 [2020-10-14 17:48:46,033 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 17:48:46,033 INFO L479 AbstractCegarLoop]: Abstraction has 637 states and 885 transitions. [2020-10-14 17:48:46,033 INFO L480 AbstractCegarLoop]: Interpolant automaton has 34 states. [2020-10-14 17:48:46,033 INFO L276 IsEmpty]: Start isEmpty. Operand 637 states and 885 transitions. [2020-10-14 17:48:46,034 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2020-10-14 17:48:46,034 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 17:48:46,034 INFO L422 BasicCegarLoop]: trace histogram [31, 31, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 17:48:46,034 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2020-10-14 17:48:46,034 INFO L427 AbstractCegarLoop]: === Iteration 34 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 17:48:46,034 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 17:48:46,034 INFO L82 PathProgramCache]: Analyzing trace with hash 659840335, now seen corresponding path program 31 times [2020-10-14 17:48:46,035 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 17:48:46,035 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [478558272] [2020-10-14 17:48:46,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 17:48:46,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:48:46,072 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:48:46,091 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:48:48,740 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:48:48,741 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 89 [2020-10-14 17:48:48,741 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 17:48:48,741 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2680 [2020-10-14 17:48:48,741 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:48:48,741 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:48:48,741 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 33 [2020-10-14 17:48:48,741 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 17:48:48,741 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 64 [2020-10-14 17:48:48,741 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:48:49,363 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 17:48:49,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:48:49,366 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:48:49,367 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:48:49,367 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 17:48:49,367 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 17:48:49,367 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 17:48:49,367 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:48:49,367 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:48:49,368 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 17:48:49,368 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 17:48:49,368 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 17:48:49,368 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:48:49,373 INFO L134 CoverageAnalysis]: Checked inductivity of 961 backedges. 0 proven. 961 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 17:48:49,374 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [478558272] [2020-10-14 17:48:49,374 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 17:48:49,374 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35] total 35 [2020-10-14 17:48:49,374 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [24876018] [2020-10-14 17:48:49,374 INFO L459 AbstractCegarLoop]: Interpolant automaton has 35 states [2020-10-14 17:48:49,374 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 17:48:49,375 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2020-10-14 17:48:49,375 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=563, Invalid=627, Unknown=0, NotChecked=0, Total=1190 [2020-10-14 17:48:49,375 INFO L87 Difference]: Start difference. First operand 637 states and 885 transitions. Second operand 35 states. [2020-10-14 17:48:50,985 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 17:48:50,985 INFO L93 Difference]: Finished difference Result 1243 states and 1756 transitions. [2020-10-14 17:48:50,986 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-10-14 17:48:50,986 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 81 [2020-10-14 17:48:50,986 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 17:48:50,990 INFO L225 Difference]: With dead ends: 1243 [2020-10-14 17:48:50,990 INFO L226 Difference]: Without dead ends: 675 [2020-10-14 17:48:50,992 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 17:48:50,993 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 675 states. [2020-10-14 17:48:51,024 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 675 to 657. [2020-10-14 17:48:51,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 657 states. [2020-10-14 17:48:51,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 657 states to 657 states and 913 transitions. [2020-10-14 17:48:51,027 INFO L78 Accepts]: Start accepts. Automaton has 657 states and 913 transitions. Word has length 81 [2020-10-14 17:48:51,027 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 17:48:51,027 INFO L479 AbstractCegarLoop]: Abstraction has 657 states and 913 transitions. [2020-10-14 17:48:51,027 INFO L480 AbstractCegarLoop]: Interpolant automaton has 35 states. [2020-10-14 17:48:51,027 INFO L276 IsEmpty]: Start isEmpty. Operand 657 states and 913 transitions. [2020-10-14 17:48:51,028 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2020-10-14 17:48:51,028 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 17:48:51,028 INFO L422 BasicCegarLoop]: trace histogram [32, 32, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 17:48:51,028 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2020-10-14 17:48:51,029 INFO L427 AbstractCegarLoop]: === Iteration 35 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 17:48:51,029 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 17:48:51,029 INFO L82 PathProgramCache]: Analyzing trace with hash -1037890643, now seen corresponding path program 32 times [2020-10-14 17:48:51,029 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 17:48:51,029 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1999655503] [2020-10-14 17:48:51,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 17:48:51,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:48:51,059 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:48:51,081 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:48:53,583 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:48:53,583 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 91 [2020-10-14 17:48:53,583 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 17:48:53,583 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2536 [2020-10-14 17:48:53,583 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:48:53,584 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:48:53,584 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 34 [2020-10-14 17:48:53,584 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 17:48:53,584 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 66 [2020-10-14 17:48:53,584 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:48:54,210 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 17:48:54,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:48:54,213 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:48:54,214 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:48:54,214 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 17:48:54,214 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 17:48:54,215 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 17:48:54,215 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:48:54,215 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:48:54,215 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 17:48:54,215 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 17:48:54,215 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 17:48:54,215 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:48:54,221 INFO L134 CoverageAnalysis]: Checked inductivity of 1024 backedges. 0 proven. 1024 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 17:48:54,222 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1999655503] [2020-10-14 17:48:54,222 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 17:48:54,222 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36] total 36 [2020-10-14 17:48:54,222 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1335114560] [2020-10-14 17:48:54,222 INFO L459 AbstractCegarLoop]: Interpolant automaton has 36 states [2020-10-14 17:48:54,222 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 17:48:54,223 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2020-10-14 17:48:54,223 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=597, Invalid=663, Unknown=0, NotChecked=0, Total=1260 [2020-10-14 17:48:54,223 INFO L87 Difference]: Start difference. First operand 657 states and 913 transitions. Second operand 36 states. [2020-10-14 17:48:56,088 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 17:48:56,089 INFO L93 Difference]: Finished difference Result 1281 states and 1810 transitions. [2020-10-14 17:48:56,089 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-10-14 17:48:56,089 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 83 [2020-10-14 17:48:56,089 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 17:48:56,092 INFO L225 Difference]: With dead ends: 1281 [2020-10-14 17:48:56,092 INFO L226 Difference]: Without dead ends: 695 [2020-10-14 17:48:56,094 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 17:48:56,095 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 695 states. [2020-10-14 17:48:56,124 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 695 to 677. [2020-10-14 17:48:56,124 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 677 states. [2020-10-14 17:48:56,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 677 states to 677 states and 941 transitions. [2020-10-14 17:48:56,126 INFO L78 Accepts]: Start accepts. Automaton has 677 states and 941 transitions. Word has length 83 [2020-10-14 17:48:56,127 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 17:48:56,127 INFO L479 AbstractCegarLoop]: Abstraction has 677 states and 941 transitions. [2020-10-14 17:48:56,127 INFO L480 AbstractCegarLoop]: Interpolant automaton has 36 states. [2020-10-14 17:48:56,127 INFO L276 IsEmpty]: Start isEmpty. Operand 677 states and 941 transitions. [2020-10-14 17:48:56,128 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2020-10-14 17:48:56,128 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 17:48:56,128 INFO L422 BasicCegarLoop]: trace histogram [33, 33, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 17:48:56,128 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2020-10-14 17:48:56,128 INFO L427 AbstractCegarLoop]: === Iteration 36 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 17:48:56,129 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 17:48:56,129 INFO L82 PathProgramCache]: Analyzing trace with hash -469788021, now seen corresponding path program 33 times [2020-10-14 17:48:56,129 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 17:48:56,129 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [603590043] [2020-10-14 17:48:56,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 17:48:56,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:48:56,158 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:48:56,181 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:48:58,996 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:48:58,996 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 93 [2020-10-14 17:48:58,996 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 17:48:58,996 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2849 [2020-10-14 17:48:58,996 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:48:58,996 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:48:58,997 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 35 [2020-10-14 17:48:58,997 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 17:48:58,997 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 68 [2020-10-14 17:48:58,997 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:48:59,693 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 17:48:59,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:48:59,695 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:48:59,696 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:48:59,696 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 17:48:59,696 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 17:48:59,696 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 17:48:59,696 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:48:59,696 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:48:59,696 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 17:48:59,697 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 17:48:59,697 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 17:48:59,697 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:48:59,702 INFO L134 CoverageAnalysis]: Checked inductivity of 1089 backedges. 0 proven. 1089 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 17:48:59,702 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [603590043] [2020-10-14 17:48:59,703 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 17:48:59,703 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37] total 37 [2020-10-14 17:48:59,703 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1245092048] [2020-10-14 17:48:59,703 INFO L459 AbstractCegarLoop]: Interpolant automaton has 37 states [2020-10-14 17:48:59,703 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 17:48:59,703 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2020-10-14 17:48:59,704 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=632, Invalid=700, Unknown=0, NotChecked=0, Total=1332 [2020-10-14 17:48:59,704 INFO L87 Difference]: Start difference. First operand 677 states and 941 transitions. Second operand 37 states. [2020-10-14 17:49:01,682 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 17:49:01,682 INFO L93 Difference]: Finished difference Result 1319 states and 1864 transitions. [2020-10-14 17:49:01,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-10-14 17:49:01,683 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 85 [2020-10-14 17:49:01,683 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 17:49:01,686 INFO L225 Difference]: With dead ends: 1319 [2020-10-14 17:49:01,686 INFO L226 Difference]: Without dead ends: 715 [2020-10-14 17:49:01,687 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 17:49:01,688 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 715 states. [2020-10-14 17:49:01,719 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 715 to 697. [2020-10-14 17:49:01,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 697 states. [2020-10-14 17:49:01,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 697 states to 697 states and 969 transitions. [2020-10-14 17:49:01,721 INFO L78 Accepts]: Start accepts. Automaton has 697 states and 969 transitions. Word has length 85 [2020-10-14 17:49:01,721 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 17:49:01,721 INFO L479 AbstractCegarLoop]: Abstraction has 697 states and 969 transitions. [2020-10-14 17:49:01,721 INFO L480 AbstractCegarLoop]: Interpolant automaton has 37 states. [2020-10-14 17:49:01,721 INFO L276 IsEmpty]: Start isEmpty. Operand 697 states and 969 transitions. [2020-10-14 17:49:01,722 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2020-10-14 17:49:01,722 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 17:49:01,722 INFO L422 BasicCegarLoop]: trace histogram [34, 34, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 17:49:01,723 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2020-10-14 17:49:01,723 INFO L427 AbstractCegarLoop]: === Iteration 37 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 17:49:01,723 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 17:49:01,723 INFO L82 PathProgramCache]: Analyzing trace with hash 15985129, now seen corresponding path program 34 times [2020-10-14 17:49:01,723 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 17:49:01,723 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1590467843] [2020-10-14 17:49:01,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 17:49:01,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:49:01,753 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:49:01,767 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:49:04,896 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:49:04,897 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 95 [2020-10-14 17:49:04,897 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 17:49:04,897 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3156 [2020-10-14 17:49:04,897 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:49:04,897 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:49:04,897 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 36 [2020-10-14 17:49:04,897 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 17:49:04,898 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 70 [2020-10-14 17:49:04,898 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:49:05,593 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 17:49:05,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:49:05,595 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:49:05,596 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:49:05,596 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 17:49:05,596 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 17:49:05,596 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 17:49:05,596 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:49:05,596 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:49:05,597 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 17:49:05,597 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 17:49:05,597 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 17:49:05,597 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:49:05,603 INFO L134 CoverageAnalysis]: Checked inductivity of 1156 backedges. 0 proven. 1156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 17:49:05,603 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1590467843] [2020-10-14 17:49:05,603 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 17:49:05,604 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38] total 38 [2020-10-14 17:49:05,604 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [329552282] [2020-10-14 17:49:05,604 INFO L459 AbstractCegarLoop]: Interpolant automaton has 38 states [2020-10-14 17:49:05,604 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 17:49:05,605 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2020-10-14 17:49:05,605 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=668, Invalid=738, Unknown=0, NotChecked=0, Total=1406 [2020-10-14 17:49:05,605 INFO L87 Difference]: Start difference. First operand 697 states and 969 transitions. Second operand 38 states. [2020-10-14 17:49:07,775 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 17:49:07,775 INFO L93 Difference]: Finished difference Result 1357 states and 1918 transitions. [2020-10-14 17:49:07,776 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-10-14 17:49:07,776 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 87 [2020-10-14 17:49:07,776 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 17:49:07,780 INFO L225 Difference]: With dead ends: 1357 [2020-10-14 17:49:07,780 INFO L226 Difference]: Without dead ends: 735 [2020-10-14 17:49:07,784 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=668, Invalid=738, Unknown=0, NotChecked=0, Total=1406 [2020-10-14 17:49:07,785 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 735 states. [2020-10-14 17:49:07,842 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 735 to 717. [2020-10-14 17:49:07,842 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 717 states. [2020-10-14 17:49:07,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 717 states to 717 states and 997 transitions. [2020-10-14 17:49:07,848 INFO L78 Accepts]: Start accepts. Automaton has 717 states and 997 transitions. Word has length 87 [2020-10-14 17:49:07,848 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 17:49:07,848 INFO L479 AbstractCegarLoop]: Abstraction has 717 states and 997 transitions. [2020-10-14 17:49:07,848 INFO L480 AbstractCegarLoop]: Interpolant automaton has 38 states. [2020-10-14 17:49:07,849 INFO L276 IsEmpty]: Start isEmpty. Operand 717 states and 997 transitions. [2020-10-14 17:49:07,850 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2020-10-14 17:49:07,850 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 17:49:07,850 INFO L422 BasicCegarLoop]: trace histogram [35, 35, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 17:49:07,851 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2020-10-14 17:49:07,851 INFO L427 AbstractCegarLoop]: === Iteration 38 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 17:49:07,851 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 17:49:07,851 INFO L82 PathProgramCache]: Analyzing trace with hash -1307452985, now seen corresponding path program 35 times [2020-10-14 17:49:07,852 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 17:49:07,852 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1428168584] [2020-10-14 17:49:07,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 17:49:07,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:49:07,898 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:49:07,933 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:49:11,341 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:49:11,341 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 97 [2020-10-14 17:49:11,342 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 17:49:11,342 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3463 [2020-10-14 17:49:11,342 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:49:11,342 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:49:11,342 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 37 [2020-10-14 17:49:11,342 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 17:49:11,342 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 72 [2020-10-14 17:49:11,342 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:49:12,111 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 17:49:12,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:49:12,112 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:49:12,113 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:49:12,113 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 17:49:12,114 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 17:49:12,114 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 17:49:12,114 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:49:12,114 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:49:12,114 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 17:49:12,115 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 17:49:12,115 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 17:49:12,115 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:49:12,122 INFO L134 CoverageAnalysis]: Checked inductivity of 1225 backedges. 0 proven. 1225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 17:49:12,122 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1428168584] [2020-10-14 17:49:12,122 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 17:49:12,123 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39] total 39 [2020-10-14 17:49:12,123 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2014195778] [2020-10-14 17:49:12,123 INFO L459 AbstractCegarLoop]: Interpolant automaton has 39 states [2020-10-14 17:49:12,123 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 17:49:12,124 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2020-10-14 17:49:12,124 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=705, Invalid=777, Unknown=0, NotChecked=0, Total=1482 [2020-10-14 17:49:12,125 INFO L87 Difference]: Start difference. First operand 717 states and 997 transitions. Second operand 39 states. [2020-10-14 17:49:13,934 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 17:49:13,935 INFO L93 Difference]: Finished difference Result 1395 states and 1972 transitions. [2020-10-14 17:49:13,935 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-10-14 17:49:13,935 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 89 [2020-10-14 17:49:13,935 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 17:49:13,938 INFO L225 Difference]: With dead ends: 1395 [2020-10-14 17:49:13,938 INFO L226 Difference]: Without dead ends: 755 [2020-10-14 17:49:13,940 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 17:49:13,940 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 755 states. [2020-10-14 17:49:13,975 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 755 to 737. [2020-10-14 17:49:13,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 737 states. [2020-10-14 17:49:13,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 737 states to 737 states and 1025 transitions. [2020-10-14 17:49:13,977 INFO L78 Accepts]: Start accepts. Automaton has 737 states and 1025 transitions. Word has length 89 [2020-10-14 17:49:13,977 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 17:49:13,978 INFO L479 AbstractCegarLoop]: Abstraction has 737 states and 1025 transitions. [2020-10-14 17:49:13,978 INFO L480 AbstractCegarLoop]: Interpolant automaton has 39 states. [2020-10-14 17:49:13,978 INFO L276 IsEmpty]: Start isEmpty. Operand 737 states and 1025 transitions. [2020-10-14 17:49:13,978 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2020-10-14 17:49:13,979 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 17:49:13,979 INFO L422 BasicCegarLoop]: trace histogram [36, 36, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 17:49:13,979 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2020-10-14 17:49:13,979 INFO L427 AbstractCegarLoop]: === Iteration 39 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 17:49:13,979 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 17:49:13,980 INFO L82 PathProgramCache]: Analyzing trace with hash -1821160923, now seen corresponding path program 36 times [2020-10-14 17:49:13,980 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 17:49:13,980 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [845411695] [2020-10-14 17:49:13,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 17:49:13,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:49:14,011 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:49:14,043 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:49:18,241 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:49:18,242 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 99 [2020-10-14 17:49:18,242 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 17:49:18,242 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4244 [2020-10-14 17:49:18,242 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:49:18,242 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:49:18,242 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 38 [2020-10-14 17:49:18,242 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 17:49:18,242 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 74 [2020-10-14 17:49:18,242 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:49:19,067 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 17:49:19,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:49:19,069 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:49:19,070 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:49:19,070 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 17:49:19,070 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 17:49:19,070 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 17:49:19,071 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:49:19,071 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:49:19,071 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 17:49:19,071 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 17:49:19,071 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 17:49:19,071 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:49:19,078 INFO L134 CoverageAnalysis]: Checked inductivity of 1296 backedges. 0 proven. 1296 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 17:49:19,078 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [845411695] [2020-10-14 17:49:19,078 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 17:49:19,078 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40] total 40 [2020-10-14 17:49:19,078 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [901209536] [2020-10-14 17:49:19,079 INFO L459 AbstractCegarLoop]: Interpolant automaton has 40 states [2020-10-14 17:49:19,079 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 17:49:19,079 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2020-10-14 17:49:19,080 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=743, Invalid=817, Unknown=0, NotChecked=0, Total=1560 [2020-10-14 17:49:19,080 INFO L87 Difference]: Start difference. First operand 737 states and 1025 transitions. Second operand 40 states. [2020-10-14 17:49:21,392 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 17:49:21,392 INFO L93 Difference]: Finished difference Result 1433 states and 2026 transitions. [2020-10-14 17:49:21,392 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-10-14 17:49:21,392 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 91 [2020-10-14 17:49:21,393 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 17:49:21,396 INFO L225 Difference]: With dead ends: 1433 [2020-10-14 17:49:21,396 INFO L226 Difference]: Without dead ends: 775 [2020-10-14 17:49:21,397 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=743, Invalid=817, Unknown=0, NotChecked=0, Total=1560 [2020-10-14 17:49:21,398 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 775 states. [2020-10-14 17:49:21,433 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 775 to 757. [2020-10-14 17:49:21,433 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 757 states. [2020-10-14 17:49:21,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 757 states to 757 states and 1053 transitions. [2020-10-14 17:49:21,435 INFO L78 Accepts]: Start accepts. Automaton has 757 states and 1053 transitions. Word has length 91 [2020-10-14 17:49:21,436 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 17:49:21,436 INFO L479 AbstractCegarLoop]: Abstraction has 757 states and 1053 transitions. [2020-10-14 17:49:21,436 INFO L480 AbstractCegarLoop]: Interpolant automaton has 40 states. [2020-10-14 17:49:21,436 INFO L276 IsEmpty]: Start isEmpty. Operand 757 states and 1053 transitions. [2020-10-14 17:49:21,437 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2020-10-14 17:49:21,437 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 17:49:21,437 INFO L422 BasicCegarLoop]: trace histogram [37, 37, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 17:49:21,437 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2020-10-14 17:49:21,437 INFO L427 AbstractCegarLoop]: === Iteration 40 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 17:49:21,438 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 17:49:21,438 INFO L82 PathProgramCache]: Analyzing trace with hash -1573250301, now seen corresponding path program 37 times [2020-10-14 17:49:21,438 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 17:49:21,438 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1767513078] [2020-10-14 17:49:21,438 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 17:49:21,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:49:21,462 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:49:21,478 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:49:25,328 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:49:25,328 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 101 [2020-10-14 17:49:25,328 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 17:49:25,328 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3876 [2020-10-14 17:49:25,329 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:49:25,329 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:49:25,329 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 39 [2020-10-14 17:49:25,329 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 17:49:25,329 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 76 [2020-10-14 17:49:25,329 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:49:26,224 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 17:49:26,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:49:26,227 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:49:26,228 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:49:26,228 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 17:49:26,228 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 17:49:26,229 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 17:49:26,229 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:49:26,229 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:49:26,229 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 17:49:26,229 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 17:49:26,229 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 17:49:26,230 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:49:26,237 INFO L134 CoverageAnalysis]: Checked inductivity of 1369 backedges. 0 proven. 1369 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 17:49:26,237 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1767513078] [2020-10-14 17:49:26,237 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 17:49:26,237 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41] total 41 [2020-10-14 17:49:26,237 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1471782532] [2020-10-14 17:49:26,238 INFO L459 AbstractCegarLoop]: Interpolant automaton has 41 states [2020-10-14 17:49:26,238 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 17:49:26,238 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2020-10-14 17:49:26,238 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=782, Invalid=858, Unknown=0, NotChecked=0, Total=1640 [2020-10-14 17:49:26,239 INFO L87 Difference]: Start difference. First operand 757 states and 1053 transitions. Second operand 41 states. [2020-10-14 17:49:28,224 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 17:49:28,225 INFO L93 Difference]: Finished difference Result 1471 states and 2080 transitions. [2020-10-14 17:49:28,225 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2020-10-14 17:49:28,225 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 93 [2020-10-14 17:49:28,225 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 17:49:28,228 INFO L225 Difference]: With dead ends: 1471 [2020-10-14 17:49:28,228 INFO L226 Difference]: Without dead ends: 795 [2020-10-14 17:49:28,230 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 17:49:28,231 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 795 states. [2020-10-14 17:49:28,266 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 795 to 777. [2020-10-14 17:49:28,266 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 777 states. [2020-10-14 17:49:28,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 777 states to 777 states and 1081 transitions. [2020-10-14 17:49:28,268 INFO L78 Accepts]: Start accepts. Automaton has 777 states and 1081 transitions. Word has length 93 [2020-10-14 17:49:28,268 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 17:49:28,268 INFO L479 AbstractCegarLoop]: Abstraction has 777 states and 1081 transitions. [2020-10-14 17:49:28,269 INFO L480 AbstractCegarLoop]: Interpolant automaton has 41 states. [2020-10-14 17:49:28,269 INFO L276 IsEmpty]: Start isEmpty. Operand 777 states and 1081 transitions. [2020-10-14 17:49:28,269 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2020-10-14 17:49:28,270 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 17:49:28,270 INFO L422 BasicCegarLoop]: trace histogram [38, 38, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 17:49:28,270 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2020-10-14 17:49:28,270 INFO L427 AbstractCegarLoop]: === Iteration 41 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 17:49:28,270 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 17:49:28,270 INFO L82 PathProgramCache]: Analyzing trace with hash 445656161, now seen corresponding path program 38 times [2020-10-14 17:49:28,271 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 17:49:28,271 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1828169694] [2020-10-14 17:49:28,271 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 17:49:28,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:49:28,306 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:49:28,333 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:49:32,388 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:49:32,389 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 103 [2020-10-14 17:49:32,389 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 17:49:32,389 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4098 [2020-10-14 17:49:32,389 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:49:32,389 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:49:32,389 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 40 [2020-10-14 17:49:32,390 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 17:49:32,390 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 78 [2020-10-14 17:49:32,390 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:49:33,307 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 17:49:33,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:49:33,308 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:49:33,309 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:49:33,310 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 17:49:33,310 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 17:49:33,310 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 17:49:33,310 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:49:33,310 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:49:33,310 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 17:49:33,311 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 17:49:33,311 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 17:49:33,311 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:49:33,318 INFO L134 CoverageAnalysis]: Checked inductivity of 1444 backedges. 0 proven. 1444 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 17:49:33,318 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1828169694] [2020-10-14 17:49:33,318 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 17:49:33,318 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42] total 42 [2020-10-14 17:49:33,318 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1637123659] [2020-10-14 17:49:33,319 INFO L459 AbstractCegarLoop]: Interpolant automaton has 42 states [2020-10-14 17:49:33,319 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 17:49:33,319 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2020-10-14 17:49:33,319 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=822, Invalid=900, Unknown=0, NotChecked=0, Total=1722 [2020-10-14 17:49:33,320 INFO L87 Difference]: Start difference. First operand 777 states and 1081 transitions. Second operand 42 states. [2020-10-14 17:49:35,740 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 17:49:35,740 INFO L93 Difference]: Finished difference Result 1509 states and 2134 transitions. [2020-10-14 17:49:35,741 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2020-10-14 17:49:35,741 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 95 [2020-10-14 17:49:35,741 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 17:49:35,744 INFO L225 Difference]: With dead ends: 1509 [2020-10-14 17:49:35,744 INFO L226 Difference]: Without dead ends: 815 [2020-10-14 17:49:35,746 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 17:49:35,747 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 815 states. [2020-10-14 17:49:35,784 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 815 to 797. [2020-10-14 17:49:35,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 797 states. [2020-10-14 17:49:35,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 797 states to 797 states and 1109 transitions. [2020-10-14 17:49:35,787 INFO L78 Accepts]: Start accepts. Automaton has 797 states and 1109 transitions. Word has length 95 [2020-10-14 17:49:35,787 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 17:49:35,787 INFO L479 AbstractCegarLoop]: Abstraction has 797 states and 1109 transitions. [2020-10-14 17:49:35,787 INFO L480 AbstractCegarLoop]: Interpolant automaton has 42 states. [2020-10-14 17:49:35,787 INFO L276 IsEmpty]: Start isEmpty. Operand 797 states and 1109 transitions. [2020-10-14 17:49:35,788 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2020-10-14 17:49:35,788 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 17:49:35,788 INFO L422 BasicCegarLoop]: trace histogram [39, 39, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 17:49:35,788 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2020-10-14 17:49:35,788 INFO L427 AbstractCegarLoop]: === Iteration 42 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 17:49:35,788 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 17:49:35,789 INFO L82 PathProgramCache]: Analyzing trace with hash -710451649, now seen corresponding path program 39 times [2020-10-14 17:49:35,789 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 17:49:35,789 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [957235057] [2020-10-14 17:49:35,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 17:49:35,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:49:35,823 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:49:35,850 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:49:40,307 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:49:40,307 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 105 [2020-10-14 17:49:40,307 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 17:49:40,307 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4498 [2020-10-14 17:49:40,307 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:49:40,308 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:49:40,308 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 41 [2020-10-14 17:49:40,308 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 17:49:40,308 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 80 [2020-10-14 17:49:40,308 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:49:41,216 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 17:49:41,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:49:41,218 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:49:41,219 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:49:41,220 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 17:49:41,220 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 17:49:41,220 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 17:49:41,220 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:49:41,220 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:49:41,220 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 17:49:41,221 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 17:49:41,221 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 17:49:41,221 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:49:41,230 INFO L134 CoverageAnalysis]: Checked inductivity of 1521 backedges. 0 proven. 1521 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 17:49:41,231 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [957235057] [2020-10-14 17:49:41,231 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 17:49:41,231 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43] total 43 [2020-10-14 17:49:41,231 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [124311508] [2020-10-14 17:49:41,232 INFO L459 AbstractCegarLoop]: Interpolant automaton has 43 states [2020-10-14 17:49:41,232 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 17:49:41,232 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2020-10-14 17:49:41,233 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=863, Invalid=943, Unknown=0, NotChecked=0, Total=1806 [2020-10-14 17:49:41,233 INFO L87 Difference]: Start difference. First operand 797 states and 1109 transitions. Second operand 43 states. [2020-10-14 17:49:43,299 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 17:49:43,299 INFO L93 Difference]: Finished difference Result 1547 states and 2188 transitions. [2020-10-14 17:49:43,300 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2020-10-14 17:49:43,300 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 97 [2020-10-14 17:49:43,300 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 17:49:43,303 INFO L225 Difference]: With dead ends: 1547 [2020-10-14 17:49:43,303 INFO L226 Difference]: Without dead ends: 835 [2020-10-14 17:49:43,305 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=863, Invalid=943, Unknown=0, NotChecked=0, Total=1806 [2020-10-14 17:49:43,306 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 835 states. [2020-10-14 17:49:43,344 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 835 to 817. [2020-10-14 17:49:43,344 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 817 states. [2020-10-14 17:49:43,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 817 states to 817 states and 1137 transitions. [2020-10-14 17:49:43,346 INFO L78 Accepts]: Start accepts. Automaton has 817 states and 1137 transitions. Word has length 97 [2020-10-14 17:49:43,347 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 17:49:43,347 INFO L479 AbstractCegarLoop]: Abstraction has 817 states and 1137 transitions. [2020-10-14 17:49:43,347 INFO L480 AbstractCegarLoop]: Interpolant automaton has 43 states. [2020-10-14 17:49:43,347 INFO L276 IsEmpty]: Start isEmpty. Operand 817 states and 1137 transitions. [2020-10-14 17:49:43,348 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2020-10-14 17:49:43,348 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 17:49:43,348 INFO L422 BasicCegarLoop]: trace histogram [40, 40, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 17:49:43,348 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2020-10-14 17:49:43,348 INFO L427 AbstractCegarLoop]: === Iteration 43 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 17:49:43,349 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 17:49:43,349 INFO L82 PathProgramCache]: Analyzing trace with hash 666472605, now seen corresponding path program 40 times [2020-10-14 17:49:43,349 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 17:49:43,349 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [546124765] [2020-10-14 17:49:43,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 17:49:43,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:49:43,388 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:49:43,418 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:49:48,329 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:49:48,329 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 107 [2020-10-14 17:49:48,329 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 17:49:48,329 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4956 [2020-10-14 17:49:48,329 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:49:48,329 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:49:48,330 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 42 [2020-10-14 17:49:48,330 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 17:49:48,330 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 82 [2020-10-14 17:49:48,330 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:49:49,346 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 17:49:49,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:49:49,347 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:49:49,349 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:49:49,349 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 17:49:49,349 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 17:49:49,350 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 17:49:49,350 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:49:49,350 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:49:49,350 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 17:49:49,350 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 17:49:49,350 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 17:49:49,351 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:49:49,359 INFO L134 CoverageAnalysis]: Checked inductivity of 1600 backedges. 0 proven. 1600 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 17:49:49,359 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [546124765] [2020-10-14 17:49:49,360 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 17:49:49,360 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [44] total 44 [2020-10-14 17:49:49,360 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [892124275] [2020-10-14 17:49:49,360 INFO L459 AbstractCegarLoop]: Interpolant automaton has 44 states [2020-10-14 17:49:49,360 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 17:49:49,361 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2020-10-14 17:49:49,362 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=905, Invalid=987, Unknown=0, NotChecked=0, Total=1892 [2020-10-14 17:49:49,362 INFO L87 Difference]: Start difference. First operand 817 states and 1137 transitions. Second operand 44 states. [2020-10-14 17:49:51,256 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 17:49:51,256 INFO L93 Difference]: Finished difference Result 1585 states and 2242 transitions. [2020-10-14 17:49:51,256 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2020-10-14 17:49:51,257 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 99 [2020-10-14 17:49:51,257 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 17:49:51,260 INFO L225 Difference]: With dead ends: 1585 [2020-10-14 17:49:51,260 INFO L226 Difference]: Without dead ends: 855 [2020-10-14 17:49:51,262 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 17:49:51,263 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 855 states. [2020-10-14 17:49:51,294 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 855 to 837. [2020-10-14 17:49:51,295 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 837 states. [2020-10-14 17:49:51,296 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 837 states to 837 states and 1165 transitions. [2020-10-14 17:49:51,296 INFO L78 Accepts]: Start accepts. Automaton has 837 states and 1165 transitions. Word has length 99 [2020-10-14 17:49:51,297 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 17:49:51,297 INFO L479 AbstractCegarLoop]: Abstraction has 837 states and 1165 transitions. [2020-10-14 17:49:51,297 INFO L480 AbstractCegarLoop]: Interpolant automaton has 44 states. [2020-10-14 17:49:51,297 INFO L276 IsEmpty]: Start isEmpty. Operand 837 states and 1165 transitions. [2020-10-14 17:49:51,298 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2020-10-14 17:49:51,298 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 17:49:51,298 INFO L422 BasicCegarLoop]: trace histogram [41, 41, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 17:49:51,298 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2020-10-14 17:49:51,298 INFO L427 AbstractCegarLoop]: === Iteration 44 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 17:49:51,298 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 17:49:51,299 INFO L82 PathProgramCache]: Analyzing trace with hash 1040753531, now seen corresponding path program 41 times [2020-10-14 17:49:51,299 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 17:49:51,299 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [361425913] [2020-10-14 17:49:51,299 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 17:49:51,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:49:51,327 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:49:51,346 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:49:56,340 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:49:56,340 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 109 [2020-10-14 17:49:56,340 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 17:49:56,340 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5022 [2020-10-14 17:49:56,340 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:49:56,340 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:49:56,341 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 43 [2020-10-14 17:49:56,341 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 17:49:56,341 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 84 [2020-10-14 17:49:56,341 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:49:57,421 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 17:49:57,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:49:57,424 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:49:57,424 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:49:57,425 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 17:49:57,425 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 17:49:57,425 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 17:49:57,425 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:49:57,425 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:49:57,425 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 17:49:57,425 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 17:49:57,425 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 17:49:57,426 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:49:57,433 INFO L134 CoverageAnalysis]: Checked inductivity of 1681 backedges. 0 proven. 1681 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 17:49:57,433 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [361425913] [2020-10-14 17:49:57,433 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 17:49:57,434 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [45] total 45 [2020-10-14 17:49:57,434 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [854739828] [2020-10-14 17:49:57,434 INFO L459 AbstractCegarLoop]: Interpolant automaton has 45 states [2020-10-14 17:49:57,434 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 17:49:57,435 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2020-10-14 17:49:57,435 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=948, Invalid=1032, Unknown=0, NotChecked=0, Total=1980 [2020-10-14 17:49:57,435 INFO L87 Difference]: Start difference. First operand 837 states and 1165 transitions. Second operand 45 states. [2020-10-14 17:49:59,715 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 17:49:59,715 INFO L93 Difference]: Finished difference Result 1623 states and 2296 transitions. [2020-10-14 17:49:59,715 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2020-10-14 17:49:59,716 INFO L78 Accepts]: Start accepts. Automaton has 45 states. Word has length 101 [2020-10-14 17:49:59,716 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 17:49:59,720 INFO L225 Difference]: With dead ends: 1623 [2020-10-14 17:49:59,720 INFO L226 Difference]: Without dead ends: 875 [2020-10-14 17:49:59,723 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=948, Invalid=1032, Unknown=0, NotChecked=0, Total=1980 [2020-10-14 17:49:59,724 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 875 states. [2020-10-14 17:49:59,765 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 875 to 857. [2020-10-14 17:49:59,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 857 states. [2020-10-14 17:49:59,767 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 857 states to 857 states and 1193 transitions. [2020-10-14 17:49:59,767 INFO L78 Accepts]: Start accepts. Automaton has 857 states and 1193 transitions. Word has length 101 [2020-10-14 17:49:59,768 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 17:49:59,768 INFO L479 AbstractCegarLoop]: Abstraction has 857 states and 1193 transitions. [2020-10-14 17:49:59,768 INFO L480 AbstractCegarLoop]: Interpolant automaton has 45 states. [2020-10-14 17:49:59,768 INFO L276 IsEmpty]: Start isEmpty. Operand 857 states and 1193 transitions. [2020-10-14 17:49:59,769 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2020-10-14 17:49:59,769 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 17:49:59,769 INFO L422 BasicCegarLoop]: trace histogram [42, 42, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 17:49:59,769 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2020-10-14 17:49:59,769 INFO L427 AbstractCegarLoop]: === Iteration 45 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 17:49:59,769 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 17:49:59,770 INFO L82 PathProgramCache]: Analyzing trace with hash -52529447, now seen corresponding path program 42 times [2020-10-14 17:49:59,770 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 17:49:59,770 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [31796590] [2020-10-14 17:49:59,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 17:49:59,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:49:59,805 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:49:59,835 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:50:04,796 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:50:04,796 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 111 [2020-10-14 17:50:04,797 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 17:50:04,797 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5007 [2020-10-14 17:50:04,797 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:50:04,797 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:50:04,797 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 44 [2020-10-14 17:50:04,797 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 17:50:04,797 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 86 [2020-10-14 17:50:04,798 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:50:05,937 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 17:50:05,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:50:05,939 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:50:05,940 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:50:05,940 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 17:50:05,940 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 17:50:05,941 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 17:50:05,941 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:50:05,941 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:50:05,941 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 17:50:05,941 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 17:50:05,942 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 17:50:05,942 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:50:05,950 INFO L134 CoverageAnalysis]: Checked inductivity of 1764 backedges. 0 proven. 1764 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 17:50:05,950 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [31796590] [2020-10-14 17:50:05,950 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 17:50:05,950 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [46] total 46 [2020-10-14 17:50:05,950 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1440669307] [2020-10-14 17:50:05,951 INFO L459 AbstractCegarLoop]: Interpolant automaton has 46 states [2020-10-14 17:50:05,951 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 17:50:05,951 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2020-10-14 17:50:05,952 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=992, Invalid=1078, Unknown=0, NotChecked=0, Total=2070 [2020-10-14 17:50:05,953 INFO L87 Difference]: Start difference. First operand 857 states and 1193 transitions. Second operand 46 states. [2020-10-14 17:50:08,338 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 17:50:08,338 INFO L93 Difference]: Finished difference Result 1661 states and 2350 transitions. [2020-10-14 17:50:08,339 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2020-10-14 17:50:08,339 INFO L78 Accepts]: Start accepts. Automaton has 46 states. Word has length 103 [2020-10-14 17:50:08,339 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 17:50:08,342 INFO L225 Difference]: With dead ends: 1661 [2020-10-14 17:50:08,342 INFO L226 Difference]: Without dead ends: 895 [2020-10-14 17:50:08,344 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=992, Invalid=1078, Unknown=0, NotChecked=0, Total=2070 [2020-10-14 17:50:08,345 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 895 states. [2020-10-14 17:50:08,378 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 895 to 877. [2020-10-14 17:50:08,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 877 states. [2020-10-14 17:50:08,379 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 877 states to 877 states and 1221 transitions. [2020-10-14 17:50:08,380 INFO L78 Accepts]: Start accepts. Automaton has 877 states and 1221 transitions. Word has length 103 [2020-10-14 17:50:08,380 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 17:50:08,380 INFO L479 AbstractCegarLoop]: Abstraction has 877 states and 1221 transitions. [2020-10-14 17:50:08,380 INFO L480 AbstractCegarLoop]: Interpolant automaton has 46 states. [2020-10-14 17:50:08,380 INFO L276 IsEmpty]: Start isEmpty. Operand 877 states and 1221 transitions. [2020-10-14 17:50:08,380 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2020-10-14 17:50:08,381 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 17:50:08,381 INFO L422 BasicCegarLoop]: trace histogram [43, 43, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 17:50:08,381 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2020-10-14 17:50:08,381 INFO L427 AbstractCegarLoop]: === Iteration 46 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 17:50:08,381 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 17:50:08,381 INFO L82 PathProgramCache]: Analyzing trace with hash 1569516215, now seen corresponding path program 43 times [2020-10-14 17:50:08,382 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 17:50:08,382 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [22059588] [2020-10-14 17:50:08,382 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 17:50:08,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:50:08,412 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:50:08,436 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:50:13,420 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:50:13,420 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 113 [2020-10-14 17:50:13,420 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 17:50:13,420 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5018 [2020-10-14 17:50:13,420 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:50:13,420 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:50:13,421 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 45 [2020-10-14 17:50:13,421 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 17:50:13,421 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 88 [2020-10-14 17:50:13,421 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:50:14,602 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 17:50:14,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:50:14,605 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:50:14,606 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:50:14,606 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 17:50:14,606 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 17:50:14,606 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 17:50:14,606 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:50:14,607 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:50:14,607 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 17:50:14,607 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 17:50:14,607 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 17:50:14,607 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:50:14,616 INFO L134 CoverageAnalysis]: Checked inductivity of 1849 backedges. 0 proven. 1849 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 17:50:14,616 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [22059588] [2020-10-14 17:50:14,616 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 17:50:14,616 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [47] total 47 [2020-10-14 17:50:14,616 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [517553406] [2020-10-14 17:50:14,617 INFO L459 AbstractCegarLoop]: Interpolant automaton has 47 states [2020-10-14 17:50:14,617 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 17:50:14,617 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2020-10-14 17:50:14,617 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1037, Invalid=1125, Unknown=0, NotChecked=0, Total=2162 [2020-10-14 17:50:14,618 INFO L87 Difference]: Start difference. First operand 877 states and 1221 transitions. Second operand 47 states. [2020-10-14 17:50:17,030 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 17:50:17,031 INFO L93 Difference]: Finished difference Result 1699 states and 2404 transitions. [2020-10-14 17:50:17,031 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2020-10-14 17:50:17,031 INFO L78 Accepts]: Start accepts. Automaton has 47 states. Word has length 105 [2020-10-14 17:50:17,031 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 17:50:17,035 INFO L225 Difference]: With dead ends: 1699 [2020-10-14 17:50:17,035 INFO L226 Difference]: Without dead ends: 915 [2020-10-14 17:50:17,037 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1037, Invalid=1125, Unknown=0, NotChecked=0, Total=2162 [2020-10-14 17:50:17,038 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 915 states. [2020-10-14 17:50:17,079 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 915 to 897. [2020-10-14 17:50:17,079 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 897 states. [2020-10-14 17:50:17,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 897 states to 897 states and 1249 transitions. [2020-10-14 17:50:17,081 INFO L78 Accepts]: Start accepts. Automaton has 897 states and 1249 transitions. Word has length 105 [2020-10-14 17:50:17,081 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 17:50:17,081 INFO L479 AbstractCegarLoop]: Abstraction has 897 states and 1249 transitions. [2020-10-14 17:50:17,081 INFO L480 AbstractCegarLoop]: Interpolant automaton has 47 states. [2020-10-14 17:50:17,081 INFO L276 IsEmpty]: Start isEmpty. Operand 897 states and 1249 transitions. [2020-10-14 17:50:17,082 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2020-10-14 17:50:17,082 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 17:50:17,082 INFO L422 BasicCegarLoop]: trace histogram [44, 44, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 17:50:17,082 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2020-10-14 17:50:17,082 INFO L427 AbstractCegarLoop]: === Iteration 47 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 17:50:17,083 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 17:50:17,083 INFO L82 PathProgramCache]: Analyzing trace with hash 1282268949, now seen corresponding path program 44 times [2020-10-14 17:50:17,083 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 17:50:17,083 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [780050686] [2020-10-14 17:50:17,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 17:50:17,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:50:17,111 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:50:17,132 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:50:22,124 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:50:22,124 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 115 [2020-10-14 17:50:22,124 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 17:50:22,125 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5024 [2020-10-14 17:50:22,125 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:50:22,125 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:50:22,125 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 46 [2020-10-14 17:50:22,125 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 17:50:22,125 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 90 [2020-10-14 17:50:22,125 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:50:23,310 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 17:50:23,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:50:23,313 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:50:23,314 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:50:23,314 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 17:50:23,314 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 17:50:23,314 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 17:50:23,314 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:50:23,314 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:50:23,314 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 17:50:23,314 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 17:50:23,315 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 17:50:23,315 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:50:23,323 INFO L134 CoverageAnalysis]: Checked inductivity of 1936 backedges. 0 proven. 1936 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 17:50:23,323 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [780050686] [2020-10-14 17:50:23,323 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 17:50:23,323 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [48] total 48 [2020-10-14 17:50:23,324 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [870654198] [2020-10-14 17:50:23,324 INFO L459 AbstractCegarLoop]: Interpolant automaton has 48 states [2020-10-14 17:50:23,324 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 17:50:23,324 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2020-10-14 17:50:23,324 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1083, Invalid=1173, Unknown=0, NotChecked=0, Total=2256 [2020-10-14 17:50:23,324 INFO L87 Difference]: Start difference. First operand 897 states and 1249 transitions. Second operand 48 states. [2020-10-14 17:50:25,469 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 17:50:25,469 INFO L93 Difference]: Finished difference Result 1737 states and 2458 transitions. [2020-10-14 17:50:25,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2020-10-14 17:50:25,469 INFO L78 Accepts]: Start accepts. Automaton has 48 states. Word has length 107 [2020-10-14 17:50:25,469 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 17:50:25,473 INFO L225 Difference]: With dead ends: 1737 [2020-10-14 17:50:25,473 INFO L226 Difference]: Without dead ends: 935 [2020-10-14 17:50:25,475 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1083, Invalid=1173, Unknown=0, NotChecked=0, Total=2256 [2020-10-14 17:50:25,476 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 935 states. [2020-10-14 17:50:25,512 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 935 to 917. [2020-10-14 17:50:25,512 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 917 states. [2020-10-14 17:50:25,514 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 917 states to 917 states and 1277 transitions. [2020-10-14 17:50:25,514 INFO L78 Accepts]: Start accepts. Automaton has 917 states and 1277 transitions. Word has length 107 [2020-10-14 17:50:25,514 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 17:50:25,514 INFO L479 AbstractCegarLoop]: Abstraction has 917 states and 1277 transitions. [2020-10-14 17:50:25,514 INFO L480 AbstractCegarLoop]: Interpolant automaton has 48 states. [2020-10-14 17:50:25,514 INFO L276 IsEmpty]: Start isEmpty. Operand 917 states and 1277 transitions. [2020-10-14 17:50:25,515 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2020-10-14 17:50:25,515 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 17:50:25,515 INFO L422 BasicCegarLoop]: trace histogram [45, 45, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 17:50:25,515 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2020-10-14 17:50:25,515 INFO L427 AbstractCegarLoop]: === Iteration 48 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 17:50:25,515 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 17:50:25,516 INFO L82 PathProgramCache]: Analyzing trace with hash 115553267, now seen corresponding path program 45 times [2020-10-14 17:50:25,516 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 17:50:25,516 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [953386243] [2020-10-14 17:50:25,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 17:50:25,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:50:25,544 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:50:25,563 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:50:30,546 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:50:30,546 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 117 [2020-10-14 17:50:30,546 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 17:50:30,547 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5013 [2020-10-14 17:50:30,547 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:50:30,547 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:50:30,547 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 47 [2020-10-14 17:50:30,547 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 17:50:30,547 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 92 [2020-10-14 17:50:30,547 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:50:31,827 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 17:50:31,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:50:31,828 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:50:31,830 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:50:31,830 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 17:50:31,830 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 17:50:31,830 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 17:50:31,831 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:50:31,831 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:50:31,831 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 17:50:31,831 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 17:50:31,831 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 17:50:31,831 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:50:31,840 INFO L134 CoverageAnalysis]: Checked inductivity of 2025 backedges. 0 proven. 2025 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 17:50:31,840 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [953386243] [2020-10-14 17:50:31,841 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 17:50:31,841 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [49] total 49 [2020-10-14 17:50:31,841 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1294731622] [2020-10-14 17:50:31,841 INFO L459 AbstractCegarLoop]: Interpolant automaton has 49 states [2020-10-14 17:50:31,841 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 17:50:31,841 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2020-10-14 17:50:31,842 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1130, Invalid=1222, Unknown=0, NotChecked=0, Total=2352 [2020-10-14 17:50:31,842 INFO L87 Difference]: Start difference. First operand 917 states and 1277 transitions. Second operand 49 states. [2020-10-14 17:50:34,376 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 17:50:34,376 INFO L93 Difference]: Finished difference Result 1775 states and 2512 transitions. [2020-10-14 17:50:34,376 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2020-10-14 17:50:34,376 INFO L78 Accepts]: Start accepts. Automaton has 49 states. Word has length 109 [2020-10-14 17:50:34,377 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 17:50:34,380 INFO L225 Difference]: With dead ends: 1775 [2020-10-14 17:50:34,380 INFO L226 Difference]: Without dead ends: 955 [2020-10-14 17:50:34,381 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1130, Invalid=1222, Unknown=0, NotChecked=0, Total=2352 [2020-10-14 17:50:34,382 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 955 states. [2020-10-14 17:50:34,423 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 955 to 937. [2020-10-14 17:50:34,423 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 937 states. [2020-10-14 17:50:34,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 937 states to 937 states and 1305 transitions. [2020-10-14 17:50:34,425 INFO L78 Accepts]: Start accepts. Automaton has 937 states and 1305 transitions. Word has length 109 [2020-10-14 17:50:34,425 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 17:50:34,425 INFO L479 AbstractCegarLoop]: Abstraction has 937 states and 1305 transitions. [2020-10-14 17:50:34,425 INFO L480 AbstractCegarLoop]: Interpolant automaton has 49 states. [2020-10-14 17:50:34,426 INFO L276 IsEmpty]: Start isEmpty. Operand 937 states and 1305 transitions. [2020-10-14 17:50:34,426 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2020-10-14 17:50:34,426 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 17:50:34,426 INFO L422 BasicCegarLoop]: trace histogram [46, 46, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 17:50:34,427 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2020-10-14 17:50:34,427 INFO L427 AbstractCegarLoop]: === Iteration 49 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 17:50:34,427 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 17:50:34,427 INFO L82 PathProgramCache]: Analyzing trace with hash -111752879, now seen corresponding path program 46 times [2020-10-14 17:50:34,427 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 17:50:34,427 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1893627773] [2020-10-14 17:50:34,427 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 17:50:34,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:50:34,455 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:50:34,475 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:50:39,446 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:50:39,446 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 119 [2020-10-14 17:50:39,446 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 17:50:39,446 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-14 17:50:39,447 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:50:39,447 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:50:39,447 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 48 [2020-10-14 17:50:39,447 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 17:50:39,447 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 94 [2020-10-14 17:50:39,447 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:50:40,804 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 17:50:40,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:50:40,806 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:50:40,807 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:50:40,807 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 17:50:40,807 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 17:50:40,807 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 17:50:40,808 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:50:40,808 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:50:40,808 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 17:50:40,808 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 17:50:40,808 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 17:50:40,808 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:50:40,817 INFO L134 CoverageAnalysis]: Checked inductivity of 2116 backedges. 0 proven. 2116 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 17:50:40,818 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1893627773] [2020-10-14 17:50:40,818 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 17:50:40,818 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [50] total 50 [2020-10-14 17:50:40,818 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1832874389] [2020-10-14 17:50:40,818 INFO L459 AbstractCegarLoop]: Interpolant automaton has 50 states [2020-10-14 17:50:40,818 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 17:50:40,819 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2020-10-14 17:50:40,819 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1178, Invalid=1272, Unknown=0, NotChecked=0, Total=2450 [2020-10-14 17:50:40,819 INFO L87 Difference]: Start difference. First operand 937 states and 1305 transitions. Second operand 50 states. [2020-10-14 17:50:43,377 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 17:50:43,377 INFO L93 Difference]: Finished difference Result 1813 states and 2566 transitions. [2020-10-14 17:50:43,378 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2020-10-14 17:50:43,378 INFO L78 Accepts]: Start accepts. Automaton has 50 states. Word has length 111 [2020-10-14 17:50:43,378 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 17:50:43,382 INFO L225 Difference]: With dead ends: 1813 [2020-10-14 17:50:43,383 INFO L226 Difference]: Without dead ends: 975 [2020-10-14 17:50:43,385 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1178, Invalid=1272, Unknown=0, NotChecked=0, Total=2450 [2020-10-14 17:50:43,386 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 975 states. [2020-10-14 17:50:43,421 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 975 to 957. [2020-10-14 17:50:43,421 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 957 states. [2020-10-14 17:50:43,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 957 states to 957 states and 1333 transitions. [2020-10-14 17:50:43,423 INFO L78 Accepts]: Start accepts. Automaton has 957 states and 1333 transitions. Word has length 111 [2020-10-14 17:50:43,423 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 17:50:43,423 INFO L479 AbstractCegarLoop]: Abstraction has 957 states and 1333 transitions. [2020-10-14 17:50:43,423 INFO L480 AbstractCegarLoop]: Interpolant automaton has 50 states. [2020-10-14 17:50:43,423 INFO L276 IsEmpty]: Start isEmpty. Operand 957 states and 1333 transitions. [2020-10-14 17:50:43,424 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2020-10-14 17:50:43,424 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 17:50:43,424 INFO L422 BasicCegarLoop]: trace histogram [47, 47, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 17:50:43,424 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2020-10-14 17:50:43,424 INFO L427 AbstractCegarLoop]: === Iteration 50 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 17:50:43,424 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 17:50:43,424 INFO L82 PathProgramCache]: Analyzing trace with hash 490372911, now seen corresponding path program 47 times [2020-10-14 17:50:43,425 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 17:50:43,425 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1101973402] [2020-10-14 17:50:43,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 17:50:43,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:50:43,453 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:50:43,473 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:50:48,442 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:50:48,442 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 121 [2020-10-14 17:50:48,442 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 17:50:48,442 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-14 17:50:48,442 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:50:48,442 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:50:48,442 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 49 [2020-10-14 17:50:48,443 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 17:50:48,443 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 96 [2020-10-14 17:50:48,443 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:50:49,858 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 17:50:49,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:50:49,860 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:50:49,861 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:50:49,861 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 17:50:49,861 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 17:50:49,861 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 17:50:49,861 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:50:49,862 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:50:49,862 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 17:50:49,862 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 17:50:49,862 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 17:50:49,862 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:50:49,871 INFO L134 CoverageAnalysis]: Checked inductivity of 2209 backedges. 0 proven. 2209 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 17:50:49,871 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1101973402] [2020-10-14 17:50:49,871 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 17:50:49,871 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [51] total 51 [2020-10-14 17:50:49,872 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1737293164] [2020-10-14 17:50:49,872 INFO L459 AbstractCegarLoop]: Interpolant automaton has 51 states [2020-10-14 17:50:49,872 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 17:50:49,872 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2020-10-14 17:50:49,873 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1227, Invalid=1323, Unknown=0, NotChecked=0, Total=2550 [2020-10-14 17:50:49,873 INFO L87 Difference]: Start difference. First operand 957 states and 1333 transitions. Second operand 51 states. [2020-10-14 17:50:52,488 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 17:50:52,488 INFO L93 Difference]: Finished difference Result 1851 states and 2620 transitions. [2020-10-14 17:50:52,488 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2020-10-14 17:50:52,489 INFO L78 Accepts]: Start accepts. Automaton has 51 states. Word has length 113 [2020-10-14 17:50:52,489 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 17:50:52,493 INFO L225 Difference]: With dead ends: 1851 [2020-10-14 17:50:52,494 INFO L226 Difference]: Without dead ends: 995 [2020-10-14 17:50:52,496 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1227, Invalid=1323, Unknown=0, NotChecked=0, Total=2550 [2020-10-14 17:50:52,497 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 995 states. [2020-10-14 17:50:52,536 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 995 to 977. [2020-10-14 17:50:52,536 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 977 states. [2020-10-14 17:50:52,537 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 977 states to 977 states and 1361 transitions. [2020-10-14 17:50:52,537 INFO L78 Accepts]: Start accepts. Automaton has 977 states and 1361 transitions. Word has length 113 [2020-10-14 17:50:52,538 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 17:50:52,538 INFO L479 AbstractCegarLoop]: Abstraction has 977 states and 1361 transitions. [2020-10-14 17:50:52,538 INFO L480 AbstractCegarLoop]: Interpolant automaton has 51 states. [2020-10-14 17:50:52,538 INFO L276 IsEmpty]: Start isEmpty. Operand 977 states and 1361 transitions. [2020-10-14 17:50:52,538 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2020-10-14 17:50:52,538 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 17:50:52,538 INFO L422 BasicCegarLoop]: trace histogram [48, 48, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 17:50:52,539 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2020-10-14 17:50:52,539 INFO L427 AbstractCegarLoop]: === Iteration 51 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 17:50:52,539 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 17:50:52,539 INFO L82 PathProgramCache]: Analyzing trace with hash -687327859, now seen corresponding path program 48 times [2020-10-14 17:50:52,539 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 17:50:52,539 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [666329130] [2020-10-14 17:50:52,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 17:50:52,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:50:52,567 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:50:52,588 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:50:57,565 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:50:57,565 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 123 [2020-10-14 17:50:57,566 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 17:50:57,566 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5009 [2020-10-14 17:50:57,566 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:50:57,566 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:50:57,566 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 50 [2020-10-14 17:50:57,566 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 17:50:57,566 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 98 [2020-10-14 17:50:57,566 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:50:59,028 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 17:50:59,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:50:59,030 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:50:59,031 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:50:59,031 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 17:50:59,031 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 17:50:59,031 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 17:50:59,031 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:50:59,031 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:50:59,032 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 17:50:59,032 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 17:50:59,032 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 17:50:59,032 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:50:59,042 INFO L134 CoverageAnalysis]: Checked inductivity of 2304 backedges. 0 proven. 2304 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 17:50:59,042 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [666329130] [2020-10-14 17:50:59,043 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 17:50:59,043 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [52] total 52 [2020-10-14 17:50:59,043 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1102457435] [2020-10-14 17:50:59,043 INFO L459 AbstractCegarLoop]: Interpolant automaton has 52 states [2020-10-14 17:50:59,043 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 17:50:59,043 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2020-10-14 17:50:59,044 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1277, Invalid=1375, Unknown=0, NotChecked=0, Total=2652 [2020-10-14 17:50:59,044 INFO L87 Difference]: Start difference. First operand 977 states and 1361 transitions. Second operand 52 states. [2020-10-14 17:51:01,951 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 17:51:01,952 INFO L93 Difference]: Finished difference Result 1889 states and 2674 transitions. [2020-10-14 17:51:01,952 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2020-10-14 17:51:01,952 INFO L78 Accepts]: Start accepts. Automaton has 52 states. Word has length 115 [2020-10-14 17:51:01,953 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 17:51:01,957 INFO L225 Difference]: With dead ends: 1889 [2020-10-14 17:51:01,957 INFO L226 Difference]: Without dead ends: 1015 [2020-10-14 17:51:01,959 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1277, Invalid=1375, Unknown=0, NotChecked=0, Total=2652 [2020-10-14 17:51:01,960 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1015 states. [2020-10-14 17:51:02,000 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1015 to 997. [2020-10-14 17:51:02,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 997 states. [2020-10-14 17:51:02,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 997 states to 997 states and 1389 transitions. [2020-10-14 17:51:02,001 INFO L78 Accepts]: Start accepts. Automaton has 997 states and 1389 transitions. Word has length 115 [2020-10-14 17:51:02,002 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 17:51:02,002 INFO L479 AbstractCegarLoop]: Abstraction has 997 states and 1389 transitions. [2020-10-14 17:51:02,002 INFO L480 AbstractCegarLoop]: Interpolant automaton has 52 states. [2020-10-14 17:51:02,002 INFO L276 IsEmpty]: Start isEmpty. Operand 997 states and 1389 transitions. [2020-10-14 17:51:02,002 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2020-10-14 17:51:02,003 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 17:51:02,003 INFO L422 BasicCegarLoop]: trace histogram [49, 49, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 17:51:02,003 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2020-10-14 17:51:02,003 INFO L427 AbstractCegarLoop]: === Iteration 52 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 17:51:02,003 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 17:51:02,003 INFO L82 PathProgramCache]: Analyzing trace with hash 1413598315, now seen corresponding path program 49 times [2020-10-14 17:51:02,003 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 17:51:02,004 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1336255716] [2020-10-14 17:51:02,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 17:51:02,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:51:02,032 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:51:02,053 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:51:07,035 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:51:07,035 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 125 [2020-10-14 17:51:07,035 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 17:51:07,035 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5015 [2020-10-14 17:51:07,035 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:51:07,035 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:51:07,035 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 51 [2020-10-14 17:51:07,036 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 17:51:07,036 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 100 [2020-10-14 17:51:07,036 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:51:08,490 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 17:51:08,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:51:08,492 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:51:08,493 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:51:08,493 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 17:51:08,494 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 17:51:08,494 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 17:51:08,494 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:51:08,494 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:51:08,494 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 17:51:08,495 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 17:51:08,495 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 17:51:08,495 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:51:08,505 INFO L134 CoverageAnalysis]: Checked inductivity of 2401 backedges. 0 proven. 2401 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 17:51:08,505 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1336255716] [2020-10-14 17:51:08,505 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 17:51:08,505 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [53] total 53 [2020-10-14 17:51:08,505 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1962643784] [2020-10-14 17:51:08,506 INFO L459 AbstractCegarLoop]: Interpolant automaton has 53 states [2020-10-14 17:51:08,506 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 17:51:08,506 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2020-10-14 17:51:08,506 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1328, Invalid=1428, Unknown=0, NotChecked=0, Total=2756 [2020-10-14 17:51:08,506 INFO L87 Difference]: Start difference. First operand 997 states and 1389 transitions. Second operand 53 states. [2020-10-14 17:51:11,661 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 17:51:11,661 INFO L93 Difference]: Finished difference Result 1927 states and 2728 transitions. [2020-10-14 17:51:11,662 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2020-10-14 17:51:11,662 INFO L78 Accepts]: Start accepts. Automaton has 53 states. Word has length 117 [2020-10-14 17:51:11,662 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 17:51:11,665 INFO L225 Difference]: With dead ends: 1927 [2020-10-14 17:51:11,666 INFO L226 Difference]: Without dead ends: 1035 [2020-10-14 17:51:11,668 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1328, Invalid=1428, Unknown=0, NotChecked=0, Total=2756 [2020-10-14 17:51:11,669 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1035 states. [2020-10-14 17:51:11,709 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1035 to 1017. [2020-10-14 17:51:11,710 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1017 states. [2020-10-14 17:51:11,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1017 states to 1017 states and 1417 transitions. [2020-10-14 17:51:11,711 INFO L78 Accepts]: Start accepts. Automaton has 1017 states and 1417 transitions. Word has length 117 [2020-10-14 17:51:11,711 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 17:51:11,711 INFO L479 AbstractCegarLoop]: Abstraction has 1017 states and 1417 transitions. [2020-10-14 17:51:11,712 INFO L480 AbstractCegarLoop]: Interpolant automaton has 53 states. [2020-10-14 17:51:11,712 INFO L276 IsEmpty]: Start isEmpty. Operand 1017 states and 1417 transitions. [2020-10-14 17:51:11,712 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2020-10-14 17:51:11,712 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 17:51:11,713 INFO L422 BasicCegarLoop]: trace histogram [50, 50, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 17:51:11,713 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2020-10-14 17:51:11,713 INFO L427 AbstractCegarLoop]: === Iteration 53 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 17:51:11,713 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 17:51:11,713 INFO L82 PathProgramCache]: Analyzing trace with hash 1769022409, now seen corresponding path program 50 times [2020-10-14 17:51:11,713 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 17:51:11,714 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [983771240] [2020-10-14 17:51:11,714 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 17:51:11,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:51:11,757 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:51:11,793 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:51:16,766 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:51:16,766 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 127 [2020-10-14 17:51:16,766 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 17:51:16,766 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5028 [2020-10-14 17:51:16,766 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:51:16,766 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:51:16,767 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 52 [2020-10-14 17:51:16,767 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 17:51:16,767 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 102 [2020-10-14 17:51:16,767 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:51:18,411 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 17:51:18,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:51:18,413 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:51:18,414 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:51:18,414 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 17:51:18,414 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 17:51:18,415 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 17:51:18,415 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:51:18,415 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:51:18,415 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 17:51:18,415 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 17:51:18,415 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 17:51:18,415 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:51:18,426 INFO L134 CoverageAnalysis]: Checked inductivity of 2500 backedges. 0 proven. 2500 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 17:51:18,426 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [983771240] [2020-10-14 17:51:18,426 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 17:51:18,426 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [54] total 54 [2020-10-14 17:51:18,427 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [307654796] [2020-10-14 17:51:18,427 INFO L459 AbstractCegarLoop]: Interpolant automaton has 54 states [2020-10-14 17:51:18,427 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 17:51:18,427 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2020-10-14 17:51:18,428 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1380, Invalid=1482, Unknown=0, NotChecked=0, Total=2862 [2020-10-14 17:51:18,428 INFO L87 Difference]: Start difference. First operand 1017 states and 1417 transitions. Second operand 54 states. [2020-10-14 17:51:21,624 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 17:51:21,624 INFO L93 Difference]: Finished difference Result 1965 states and 2782 transitions. [2020-10-14 17:51:21,625 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2020-10-14 17:51:21,625 INFO L78 Accepts]: Start accepts. Automaton has 54 states. Word has length 119 [2020-10-14 17:51:21,625 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 17:51:21,630 INFO L225 Difference]: With dead ends: 1965 [2020-10-14 17:51:21,630 INFO L226 Difference]: Without dead ends: 1055 [2020-10-14 17:51:21,633 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=1380, Invalid=1482, Unknown=0, NotChecked=0, Total=2862 [2020-10-14 17:51:21,634 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1055 states. [2020-10-14 17:51:21,682 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1055 to 1037. [2020-10-14 17:51:21,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1037 states. [2020-10-14 17:51:21,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1037 states to 1037 states and 1445 transitions. [2020-10-14 17:51:21,684 INFO L78 Accepts]: Start accepts. Automaton has 1037 states and 1445 transitions. Word has length 119 [2020-10-14 17:51:21,684 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 17:51:21,684 INFO L479 AbstractCegarLoop]: Abstraction has 1037 states and 1445 transitions. [2020-10-14 17:51:21,684 INFO L480 AbstractCegarLoop]: Interpolant automaton has 54 states. [2020-10-14 17:51:21,684 INFO L276 IsEmpty]: Start isEmpty. Operand 1037 states and 1445 transitions. [2020-10-14 17:51:21,684 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2020-10-14 17:51:21,684 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 17:51:21,685 INFO L422 BasicCegarLoop]: trace histogram [51, 51, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 17:51:21,685 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2020-10-14 17:51:21,685 INFO L427 AbstractCegarLoop]: === Iteration 54 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 17:51:21,685 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 17:51:21,685 INFO L82 PathProgramCache]: Analyzing trace with hash -265806937, now seen corresponding path program 51 times [2020-10-14 17:51:21,685 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 17:51:21,685 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [780080578] [2020-10-14 17:51:21,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 17:51:21,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:51:21,715 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:51:21,738 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:51:26,731 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:51:26,731 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 129 [2020-10-14 17:51:26,731 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 17:51:26,731 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5028 [2020-10-14 17:51:26,731 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:51:26,731 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:51:26,732 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 53 [2020-10-14 17:51:26,732 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 17:51:26,732 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 104 [2020-10-14 17:51:26,732 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:51:28,406 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 17:51:28,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:51:28,407 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:51:28,408 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:51:28,409 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 17:51:28,409 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 17:51:28,409 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 17:51:28,409 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:51:28,409 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:51:28,409 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 17:51:28,409 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 17:51:28,409 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 17:51:28,410 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:51:28,421 INFO L134 CoverageAnalysis]: Checked inductivity of 2601 backedges. 0 proven. 2601 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 17:51:28,421 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [780080578] [2020-10-14 17:51:28,421 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 17:51:28,422 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [55] total 55 [2020-10-14 17:51:28,422 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [728995996] [2020-10-14 17:51:28,422 INFO L459 AbstractCegarLoop]: Interpolant automaton has 55 states [2020-10-14 17:51:28,422 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 17:51:28,422 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2020-10-14 17:51:28,423 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1433, Invalid=1537, Unknown=0, NotChecked=0, Total=2970 [2020-10-14 17:51:28,423 INFO L87 Difference]: Start difference. First operand 1037 states and 1445 transitions. Second operand 55 states. [2020-10-14 17:51:31,548 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 17:51:31,548 INFO L93 Difference]: Finished difference Result 2003 states and 2836 transitions. [2020-10-14 17:51:31,548 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2020-10-14 17:51:31,549 INFO L78 Accepts]: Start accepts. Automaton has 55 states. Word has length 121 [2020-10-14 17:51:31,549 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 17:51:31,551 INFO L225 Difference]: With dead ends: 2003 [2020-10-14 17:51:31,551 INFO L226 Difference]: Without dead ends: 1075 [2020-10-14 17:51:31,554 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=1433, Invalid=1537, Unknown=0, NotChecked=0, Total=2970 [2020-10-14 17:51:31,555 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1075 states. [2020-10-14 17:51:31,598 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1075 to 1057. [2020-10-14 17:51:31,598 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1057 states. [2020-10-14 17:51:31,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1057 states to 1057 states and 1473 transitions. [2020-10-14 17:51:31,600 INFO L78 Accepts]: Start accepts. Automaton has 1057 states and 1473 transitions. Word has length 121 [2020-10-14 17:51:31,600 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 17:51:31,600 INFO L479 AbstractCegarLoop]: Abstraction has 1057 states and 1473 transitions. [2020-10-14 17:51:31,600 INFO L480 AbstractCegarLoop]: Interpolant automaton has 55 states. [2020-10-14 17:51:31,600 INFO L276 IsEmpty]: Start isEmpty. Operand 1057 states and 1473 transitions. [2020-10-14 17:51:31,601 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2020-10-14 17:51:31,601 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 17:51:31,601 INFO L422 BasicCegarLoop]: trace histogram [52, 52, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 17:51:31,601 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2020-10-14 17:51:31,601 INFO L427 AbstractCegarLoop]: === Iteration 55 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 17:51:31,601 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 17:51:31,602 INFO L82 PathProgramCache]: Analyzing trace with hash -1526688763, now seen corresponding path program 52 times [2020-10-14 17:51:31,602 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 17:51:31,602 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [596353627] [2020-10-14 17:51:31,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 17:51:31,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:51:31,634 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:51:31,734 FATAL L256 erpolLogProxyWrapper]: Now shrinking...