/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-lopstr16/flag_loopdep.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-adbd35c [2020-10-14 18:21:13,402 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-14 18:21:13,405 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-14 18:21:13,439 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-14 18:21:13,439 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-14 18:21:13,440 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-14 18:21:13,442 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-14 18:21:13,443 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-14 18:21:13,445 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-14 18:21:13,446 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-14 18:21:13,447 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-14 18:21:13,448 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-14 18:21:13,448 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-14 18:21:13,449 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-14 18:21:13,450 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-14 18:21:13,451 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-14 18:21:13,452 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-14 18:21:13,453 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-14 18:21:13,454 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-14 18:21:13,456 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-14 18:21:13,458 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-14 18:21:13,459 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-14 18:21:13,460 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-14 18:21:13,461 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-14 18:21:13,463 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-14 18:21:13,463 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-14 18:21:13,463 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-14 18:21:13,464 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-14 18:21:13,465 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-14 18:21:13,465 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-14 18:21:13,466 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-14 18:21:13,466 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-14 18:21:13,467 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-14 18:21:13,468 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-14 18:21:13,469 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-14 18:21:13,469 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-14 18:21:13,470 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-14 18:21:13,470 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-14 18:21:13,470 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-14 18:21:13,471 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-14 18:21:13,472 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-14 18:21:13,473 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-14 18:21:13,505 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-14 18:21:13,505 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-14 18:21:13,507 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-14 18:21:13,507 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-14 18:21:13,507 INFO L138 SettingsManager]: * Use SBE=true [2020-10-14 18:21:13,507 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-14 18:21:13,508 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-14 18:21:13,508 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-14 18:21:13,508 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-14 18:21:13,508 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-14 18:21:13,508 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-14 18:21:13,509 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-14 18:21:13,509 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-14 18:21:13,509 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-14 18:21:13,509 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-14 18:21:13,509 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-14 18:21:13,510 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-14 18:21:13,510 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-14 18:21:13,510 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-14 18:21:13,510 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-14 18:21:13,510 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-14 18:21:13,511 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-14 18:21:13,511 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-14 18:21:13,511 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-14 18:21:13,511 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-14 18:21:13,511 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-14 18:21:13,512 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-14 18:21:13,512 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-14 18:21:13,512 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-14 18:21:13,512 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.2;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.2;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.2;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.2;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.2;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.2;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.2;log-additional-information=true;unknown-allowed=true; [2020-10-14 18:21:13,817 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-14 18:21:13,835 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-14 18:21:13,842 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-14 18:21:13,844 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-14 18:21:13,845 INFO L275 PluginConnector]: CDTParser initialized [2020-10-14 18:21:13,846 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-lopstr16/flag_loopdep.i [2020-10-14 18:21:13,919 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/615110b35/21f39f3a4b2d492fb84882af8eb0fb9c/FLAGcb9ec8c48 [2020-10-14 18:21:14,407 INFO L306 CDTParser]: Found 1 translation units. [2020-10-14 18:21:14,408 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/array-lopstr16/flag_loopdep.i [2020-10-14 18:21:14,414 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/615110b35/21f39f3a4b2d492fb84882af8eb0fb9c/FLAGcb9ec8c48 [2020-10-14 18:21:14,785 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/615110b35/21f39f3a4b2d492fb84882af8eb0fb9c [2020-10-14 18:21:14,796 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-14 18:21:14,798 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-14 18:21:14,799 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-14 18:21:14,799 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-14 18:21:14,803 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-14 18:21:14,804 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 06:21:14" (1/1) ... [2020-10-14 18:21:14,807 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@390ac93f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 06:21:14, skipping insertion in model container [2020-10-14 18:21:14,807 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 06:21:14" (1/1) ... [2020-10-14 18:21:14,815 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-14 18:21:14,838 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-14 18:21:15,068 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-14 18:21:15,076 INFO L203 MainTranslator]: Completed pre-run [2020-10-14 18:21:15,099 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-14 18:21:15,115 INFO L208 MainTranslator]: Completed translation [2020-10-14 18:21:15,115 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 06:21:15 WrapperNode [2020-10-14 18:21:15,115 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-14 18:21:15,116 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-14 18:21:15,116 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-14 18:21:15,116 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-14 18:21:15,218 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 06:21:15" (1/1) ... [2020-10-14 18:21:15,220 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 06:21:15" (1/1) ... [2020-10-14 18:21:15,229 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 06:21:15" (1/1) ... [2020-10-14 18:21:15,230 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 06:21:15" (1/1) ... [2020-10-14 18:21:15,251 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 06:21:15" (1/1) ... [2020-10-14 18:21:15,258 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 06:21:15" (1/1) ... [2020-10-14 18:21:15,265 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 06:21:15" (1/1) ... [2020-10-14 18:21:15,270 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-14 18:21:15,271 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-14 18:21:15,271 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-14 18:21:15,272 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-14 18:21:15,272 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 06:21:15" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-14 18:21:15,327 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-14 18:21:15,327 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-14 18:21:15,327 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-14 18:21:15,328 INFO L138 BoogieDeclarations]: Found implementation of procedure init [2020-10-14 18:21:15,329 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-14 18:21:15,330 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-10-14 18:21:15,331 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-14 18:21:15,332 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-10-14 18:21:15,332 INFO L130 BoogieDeclarations]: Found specification of procedure nondet_pointer [2020-10-14 18:21:15,332 INFO L130 BoogieDeclarations]: Found specification of procedure init [2020-10-14 18:21:15,332 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-10-14 18:21:15,332 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-10-14 18:21:15,332 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-14 18:21:15,333 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-14 18:21:15,333 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-10-14 18:21:15,335 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-14 18:21:15,335 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-14 18:21:15,336 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-14 18:21:15,589 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-14 18:21:15,590 INFO L295 CfgBuilder]: Removed 3 assume(true) statements. [2020-10-14 18:21:15,594 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 06:21:15 BoogieIcfgContainer [2020-10-14 18:21:15,595 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-14 18:21:15,596 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-14 18:21:15,596 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-14 18:21:15,599 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-14 18:21:15,600 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.10 06:21:14" (1/3) ... [2020-10-14 18:21:15,601 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1436b413 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 06:21:15, skipping insertion in model container [2020-10-14 18:21:15,601 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 06:21:15" (2/3) ... [2020-10-14 18:21:15,601 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1436b413 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 06:21:15, skipping insertion in model container [2020-10-14 18:21:15,601 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 06:21:15" (3/3) ... [2020-10-14 18:21:15,603 INFO L109 eAbstractionObserver]: Analyzing ICFG flag_loopdep.i [2020-10-14 18:21:15,618 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-14 18:21:15,625 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-14 18:21:15,648 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-14 18:21:15,683 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-10-14 18:21:15,683 INFO L376 AbstractCegarLoop]: Hoare is true [2020-10-14 18:21:15,683 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-14 18:21:15,683 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-14 18:21:15,683 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-14 18:21:15,684 INFO L380 AbstractCegarLoop]: Difference is false [2020-10-14 18:21:15,684 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-14 18:21:15,684 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-14 18:21:15,707 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states. [2020-10-14 18:21:15,714 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-10-14 18:21:15,715 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 18:21:15,716 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 18:21:15,717 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 18:21:15,723 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 18:21:15,723 INFO L82 PathProgramCache]: Analyzing trace with hash 1059974619, now seen corresponding path program 1 times [2020-10-14 18:21:15,733 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 18:21:15,733 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1480470843] [2020-10-14 18:21:15,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 18:21:15,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:21:15,897 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:21:15,947 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:21:16,176 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:21:16,177 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 30 [2020-10-14 18:21:16,177 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 18:21:16,177 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 305 [2020-10-14 18:21:16,183 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:21:16,184 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:21:16,184 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-14 18:21:16,184 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-14 18:21:16,185 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 4 [2020-10-14 18:21:16,185 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 7 [2020-10-14 18:21:16,281 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 18:21:16,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:21:16,287 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:21:16,292 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:21:16,292 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 18:21:16,292 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:21:16,293 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-14 18:21:16,293 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:21:16,294 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:21:16,294 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:21:16,294 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:21:16,295 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:21:16,295 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 18:21:16,318 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-14 18:21:16,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:21:16,328 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:21:16,355 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:21:16,356 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-14 18:21:16,356 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:21:16,357 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 30 [2020-10-14 18:21:16,357 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:21:16,357 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:21:16,358 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-14 18:21:16,358 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-14 18:21:16,358 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-14 18:21:16,359 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 18:21:16,392 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 18:21:16,394 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1480470843] [2020-10-14 18:21:16,396 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 18:21:16,397 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-14 18:21:16,398 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1576345834] [2020-10-14 18:21:16,404 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-14 18:21:16,404 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 18:21:16,420 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-14 18:21:16,421 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-14 18:21:16,424 INFO L87 Difference]: Start difference. First operand 33 states. Second operand 6 states. [2020-10-14 18:21:16,645 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 18:21:16,646 INFO L93 Difference]: Finished difference Result 60 states and 77 transitions. [2020-10-14 18:21:16,646 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-14 18:21:16,648 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 20 [2020-10-14 18:21:16,648 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 18:21:16,657 INFO L225 Difference]: With dead ends: 60 [2020-10-14 18:21:16,657 INFO L226 Difference]: Without dead ends: 30 [2020-10-14 18:21:16,661 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2020-10-14 18:21:16,681 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2020-10-14 18:21:16,702 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 29. [2020-10-14 18:21:16,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2020-10-14 18:21:16,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 33 transitions. [2020-10-14 18:21:16,706 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 33 transitions. Word has length 20 [2020-10-14 18:21:16,707 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 18:21:16,707 INFO L479 AbstractCegarLoop]: Abstraction has 29 states and 33 transitions. [2020-10-14 18:21:16,707 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-14 18:21:16,707 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 33 transitions. [2020-10-14 18:21:16,708 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-14 18:21:16,708 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 18:21:16,709 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 18:21:16,709 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-14 18:21:16,709 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 18:21:16,710 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 18:21:16,710 INFO L82 PathProgramCache]: Analyzing trace with hash 1782065480, now seen corresponding path program 1 times [2020-10-14 18:21:16,710 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 18:21:16,711 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [929024788] [2020-10-14 18:21:16,711 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 18:21:16,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:21:16,742 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:21:16,765 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:21:17,101 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:21:17,102 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 32 [2020-10-14 18:21:17,103 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 18:21:17,104 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 370 [2020-10-14 18:21:17,104 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:21:17,105 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:21:17,105 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-14 18:21:17,105 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-14 18:21:17,105 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-14 18:21:17,105 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 18:21:17,138 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 18:21:17,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:21:17,145 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:21:17,149 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:21:17,149 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 18:21:17,150 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:21:17,150 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-14 18:21:17,150 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:21:17,151 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:21:17,151 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:21:17,151 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:21:17,151 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:21:17,151 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 18:21:17,168 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-14 18:21:17,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:21:17,184 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:21:17,231 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:21:17,232 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-10-14 18:21:17,232 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:21:17,232 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 52 [2020-10-14 18:21:17,233 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:21:17,233 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:21:17,233 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-14 18:21:17,234 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-14 18:21:17,234 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-14 18:21:17,234 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 18:21:17,285 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 18:21:17,286 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [929024788] [2020-10-14 18:21:17,286 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 18:21:17,286 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-14 18:21:17,287 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [646134087] [2020-10-14 18:21:17,290 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-14 18:21:17,290 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 18:21:17,291 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-14 18:21:17,291 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-10-14 18:21:17,291 INFO L87 Difference]: Start difference. First operand 29 states and 33 transitions. Second operand 7 states. [2020-10-14 18:21:17,501 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 18:21:17,501 INFO L93 Difference]: Finished difference Result 50 states and 58 transitions. [2020-10-14 18:21:17,502 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-14 18:21:17,503 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 22 [2020-10-14 18:21:17,503 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 18:21:17,504 INFO L225 Difference]: With dead ends: 50 [2020-10-14 18:21:17,504 INFO L226 Difference]: Without dead ends: 32 [2020-10-14 18:21:17,506 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2020-10-14 18:21:17,506 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2020-10-14 18:21:17,519 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 31. [2020-10-14 18:21:17,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2020-10-14 18:21:17,520 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 35 transitions. [2020-10-14 18:21:17,520 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 35 transitions. Word has length 22 [2020-10-14 18:21:17,521 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 18:21:17,521 INFO L479 AbstractCegarLoop]: Abstraction has 31 states and 35 transitions. [2020-10-14 18:21:17,522 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-14 18:21:17,522 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 35 transitions. [2020-10-14 18:21:17,524 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-14 18:21:17,524 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 18:21:17,524 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 18:21:17,525 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-14 18:21:17,525 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 18:21:17,525 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 18:21:17,525 INFO L82 PathProgramCache]: Analyzing trace with hash 2059999690, now seen corresponding path program 2 times [2020-10-14 18:21:17,526 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 18:21:17,526 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1499173888] [2020-10-14 18:21:17,526 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 18:21:17,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:21:17,557 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:21:17,582 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:21:17,827 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:21:17,827 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 34 [2020-10-14 18:21:17,827 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 18:21:17,827 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 281 [2020-10-14 18:21:17,828 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:21:17,828 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:21:17,828 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-14 18:21:17,829 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-14 18:21:17,829 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-14 18:21:17,829 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 18:21:17,848 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 18:21:17,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:21:17,852 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:21:17,854 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:21:17,855 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 18:21:17,855 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:21:17,855 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-14 18:21:17,856 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:21:17,856 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:21:17,856 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:21:17,857 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:21:17,857 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:21:17,857 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 18:21:17,873 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-14 18:21:17,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:21:17,896 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:21:17,950 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:21:17,951 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 13 [2020-10-14 18:21:17,951 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:21:17,951 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 66 [2020-10-14 18:21:17,951 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:21:17,952 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:21:17,952 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-14 18:21:17,952 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-14 18:21:17,953 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-14 18:21:17,953 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 18:21:18,007 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 18:21:18,008 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1499173888] [2020-10-14 18:21:18,008 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 18:21:18,008 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-14 18:21:18,009 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [899966503] [2020-10-14 18:21:18,009 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-14 18:21:18,010 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 18:21:18,010 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-14 18:21:18,010 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2020-10-14 18:21:18,011 INFO L87 Difference]: Start difference. First operand 31 states and 35 transitions. Second operand 8 states. [2020-10-14 18:21:18,282 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 18:21:18,282 INFO L93 Difference]: Finished difference Result 52 states and 60 transitions. [2020-10-14 18:21:18,285 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-14 18:21:18,286 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 24 [2020-10-14 18:21:18,286 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 18:21:18,287 INFO L225 Difference]: With dead ends: 52 [2020-10-14 18:21:18,288 INFO L226 Difference]: Without dead ends: 34 [2020-10-14 18:21:18,291 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2020-10-14 18:21:18,291 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2020-10-14 18:21:18,301 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 33. [2020-10-14 18:21:18,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-10-14 18:21:18,306 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 37 transitions. [2020-10-14 18:21:18,307 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 37 transitions. Word has length 24 [2020-10-14 18:21:18,307 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 18:21:18,307 INFO L479 AbstractCegarLoop]: Abstraction has 33 states and 37 transitions. [2020-10-14 18:21:18,308 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-14 18:21:18,308 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 37 transitions. [2020-10-14 18:21:18,309 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-14 18:21:18,312 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 18:21:18,312 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, 1] [2020-10-14 18:21:18,312 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-14 18:21:18,313 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 18:21:18,313 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 18:21:18,313 INFO L82 PathProgramCache]: Analyzing trace with hash -1428164148, now seen corresponding path program 3 times [2020-10-14 18:21:18,314 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 18:21:18,316 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1298531328] [2020-10-14 18:21:18,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 18:21:18,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:21:18,355 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:21:18,376 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:21:18,736 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:21:18,737 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 36 [2020-10-14 18:21:18,737 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 18:21:18,737 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 391 [2020-10-14 18:21:18,738 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:21:18,738 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:21:18,739 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-14 18:21:18,739 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-14 18:21:18,739 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-14 18:21:18,740 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 18:21:18,770 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 18:21:18,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:21:18,773 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:21:18,778 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:21:18,779 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 18:21:18,779 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:21:18,780 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-14 18:21:18,780 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:21:18,780 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:21:18,781 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:21:18,781 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:21:18,781 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:21:18,782 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 18:21:18,802 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-14 18:21:18,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:21:18,817 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:21:18,901 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:21:18,902 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 15 [2020-10-14 18:21:18,902 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:21:18,903 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 90 [2020-10-14 18:21:18,903 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:21:18,903 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:21:18,904 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-14 18:21:18,904 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-14 18:21:18,904 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-14 18:21:18,905 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 18:21:18,997 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 18:21:18,999 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1298531328] [2020-10-14 18:21:19,000 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 18:21:19,000 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-14 18:21:19,001 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1048751273] [2020-10-14 18:21:19,002 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-14 18:21:19,002 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 18:21:19,003 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-14 18:21:19,004 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2020-10-14 18:21:19,004 INFO L87 Difference]: Start difference. First operand 33 states and 37 transitions. Second operand 9 states. [2020-10-14 18:21:19,276 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 18:21:19,277 INFO L93 Difference]: Finished difference Result 54 states and 62 transitions. [2020-10-14 18:21:19,277 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-14 18:21:19,278 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 26 [2020-10-14 18:21:19,278 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 18:21:19,279 INFO L225 Difference]: With dead ends: 54 [2020-10-14 18:21:19,279 INFO L226 Difference]: Without dead ends: 36 [2020-10-14 18:21:19,280 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2020-10-14 18:21:19,281 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2020-10-14 18:21:19,294 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 35. [2020-10-14 18:21:19,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2020-10-14 18:21:19,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 39 transitions. [2020-10-14 18:21:19,298 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 39 transitions. Word has length 26 [2020-10-14 18:21:19,298 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 18:21:19,298 INFO L479 AbstractCegarLoop]: Abstraction has 35 states and 39 transitions. [2020-10-14 18:21:19,298 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-14 18:21:19,299 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 39 transitions. [2020-10-14 18:21:19,302 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-14 18:21:19,302 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 18:21:19,303 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, 1] [2020-10-14 18:21:19,303 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-14 18:21:19,303 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 18:21:19,304 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 18:21:19,304 INFO L82 PathProgramCache]: Analyzing trace with hash 815845710, now seen corresponding path program 4 times [2020-10-14 18:21:19,304 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 18:21:19,305 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1866380443] [2020-10-14 18:21:19,306 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 18:21:19,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:21:19,357 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:21:19,377 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:21:19,690 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:21:19,690 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 38 [2020-10-14 18:21:19,690 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 18:21:19,690 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 339 [2020-10-14 18:21:19,691 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:21:19,691 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:21:19,691 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-14 18:21:19,691 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-14 18:21:19,691 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-14 18:21:19,692 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 18:21:19,714 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 18:21:19,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:21:19,718 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:21:19,719 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:21:19,720 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 18:21:19,721 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:21:19,721 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-14 18:21:19,721 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:21:19,721 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:21:19,722 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:21:19,722 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:21:19,722 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:21:19,722 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 18:21:19,743 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-14 18:21:19,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:21:19,756 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:21:19,829 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:21:19,830 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 17 [2020-10-14 18:21:19,830 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:21:19,830 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 78 [2020-10-14 18:21:19,830 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:21:19,831 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:21:19,832 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-14 18:21:19,832 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-14 18:21:19,832 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-14 18:21:19,832 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-14 18:21:19,909 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 18:21:19,910 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1866380443] [2020-10-14 18:21:19,910 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 18:21:19,910 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-14 18:21:19,911 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1602050905] [2020-10-14 18:21:19,915 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-14 18:21:19,916 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 18:21:19,916 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-14 18:21:19,916 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2020-10-14 18:21:19,917 INFO L87 Difference]: Start difference. First operand 35 states and 39 transitions. Second operand 10 states. [2020-10-14 18:21:20,121 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 18:21:20,122 INFO L93 Difference]: Finished difference Result 56 states and 64 transitions. [2020-10-14 18:21:20,122 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-14 18:21:20,122 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 28 [2020-10-14 18:21:20,123 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 18:21:20,123 INFO L225 Difference]: With dead ends: 56 [2020-10-14 18:21:20,123 INFO L226 Difference]: Without dead ends: 38 [2020-10-14 18:21:20,124 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2020-10-14 18:21:20,125 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2020-10-14 18:21:20,133 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 37. [2020-10-14 18:21:20,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2020-10-14 18:21:20,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 41 transitions. [2020-10-14 18:21:20,135 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 41 transitions. Word has length 28 [2020-10-14 18:21:20,135 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 18:21:20,135 INFO L479 AbstractCegarLoop]: Abstraction has 37 states and 41 transitions. [2020-10-14 18:21:20,135 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-14 18:21:20,136 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 41 transitions. [2020-10-14 18:21:20,137 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-10-14 18:21:20,137 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 18:21:20,137 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, 1] [2020-10-14 18:21:20,138 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-14 18:21:20,138 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 18:21:20,138 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 18:21:20,138 INFO L82 PathProgramCache]: Analyzing trace with hash 1235736656, now seen corresponding path program 5 times [2020-10-14 18:21:20,139 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 18:21:20,139 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [383120076] [2020-10-14 18:21:20,139 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 18:21:20,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:21:20,185 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:21:20,203 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:21:20,617 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:21:20,617 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 40 [2020-10-14 18:21:20,618 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 18:21:20,618 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 440 [2020-10-14 18:21:20,618 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:21:20,618 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:21:20,618 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-14 18:21:20,619 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-14 18:21:20,619 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-14 18:21:20,619 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 18:21:20,638 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 18:21:20,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:21:20,640 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:21:20,642 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:21:20,642 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 18:21:20,643 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:21:20,643 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-14 18:21:20,643 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:21:20,643 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:21:20,643 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:21:20,644 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:21:20,644 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:21:20,644 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 18:21:20,657 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-14 18:21:20,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:21:20,672 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:21:20,768 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:21:20,768 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 19 [2020-10-14 18:21:20,768 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:21:20,769 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 101 [2020-10-14 18:21:20,769 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:21:20,769 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:21:20,770 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-14 18:21:20,770 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-14 18:21:20,770 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-14 18:21:20,771 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 18:21:20,888 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 18:21:20,889 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [383120076] [2020-10-14 18:21:20,889 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 18:21:20,889 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-14 18:21:20,890 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [805704352] [2020-10-14 18:21:20,890 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-14 18:21:20,891 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 18:21:20,891 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-14 18:21:20,891 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2020-10-14 18:21:20,892 INFO L87 Difference]: Start difference. First operand 37 states and 41 transitions. Second operand 11 states. [2020-10-14 18:21:21,139 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 18:21:21,140 INFO L93 Difference]: Finished difference Result 58 states and 66 transitions. [2020-10-14 18:21:21,140 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-14 18:21:21,141 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 30 [2020-10-14 18:21:21,141 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 18:21:21,142 INFO L225 Difference]: With dead ends: 58 [2020-10-14 18:21:21,142 INFO L226 Difference]: Without dead ends: 40 [2020-10-14 18:21:21,143 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=53, Invalid=129, Unknown=0, NotChecked=0, Total=182 [2020-10-14 18:21:21,144 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2020-10-14 18:21:21,153 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 39. [2020-10-14 18:21:21,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2020-10-14 18:21:21,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 43 transitions. [2020-10-14 18:21:21,157 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 43 transitions. Word has length 30 [2020-10-14 18:21:21,157 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 18:21:21,158 INFO L479 AbstractCegarLoop]: Abstraction has 39 states and 43 transitions. [2020-10-14 18:21:21,158 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-14 18:21:21,158 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 43 transitions. [2020-10-14 18:21:21,161 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-10-14 18:21:21,161 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 18:21:21,161 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, 1] [2020-10-14 18:21:21,161 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-14 18:21:21,161 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 18:21:21,162 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 18:21:21,162 INFO L82 PathProgramCache]: Analyzing trace with hash 1024009938, now seen corresponding path program 6 times [2020-10-14 18:21:21,182 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 18:21:21,182 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1938750140] [2020-10-14 18:21:21,183 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 18:21:21,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:21:21,211 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:21:21,233 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:21:21,626 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:21:21,626 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 42 [2020-10-14 18:21:21,627 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 18:21:21,627 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 425 [2020-10-14 18:21:21,630 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:21:21,630 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:21:21,631 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-14 18:21:21,631 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-14 18:21:21,631 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-14 18:21:21,631 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 18:21:21,661 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 18:21:21,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:21:21,664 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:21:21,665 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:21:21,666 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 18:21:21,666 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:21:21,666 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 18:21:21,666 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:21:21,667 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:21:21,667 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:21:21,670 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:21:21,670 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:21:21,670 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-14 18:21:21,682 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-14 18:21:21,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:21:21,698 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:21:21,854 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:21:21,855 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 21 [2020-10-14 18:21:21,855 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:21:21,856 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 162 [2020-10-14 18:21:21,856 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:21:21,856 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:21:21,857 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-14 18:21:21,857 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-14 18:21:21,857 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-14 18:21:21,858 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 18:21:22,032 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 18:21:22,032 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1938750140] [2020-10-14 18:21:22,033 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 18:21:22,033 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-14 18:21:22,034 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2095437902] [2020-10-14 18:21:22,035 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-14 18:21:22,035 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 18:21:22,036 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-14 18:21:22,036 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2020-10-14 18:21:22,037 INFO L87 Difference]: Start difference. First operand 39 states and 43 transitions. Second operand 12 states. [2020-10-14 18:21:22,339 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 18:21:22,340 INFO L93 Difference]: Finished difference Result 60 states and 68 transitions. [2020-10-14 18:21:22,340 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-14 18:21:22,341 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 32 [2020-10-14 18:21:22,341 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 18:21:22,345 INFO L225 Difference]: With dead ends: 60 [2020-10-14 18:21:22,345 INFO L226 Difference]: Without dead ends: 42 [2020-10-14 18:21:22,349 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=62, Invalid=148, Unknown=0, NotChecked=0, Total=210 [2020-10-14 18:21:22,349 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-10-14 18:21:22,357 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 41. [2020-10-14 18:21:22,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2020-10-14 18:21:22,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 45 transitions. [2020-10-14 18:21:22,359 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 45 transitions. Word has length 32 [2020-10-14 18:21:22,360 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 18:21:22,360 INFO L479 AbstractCegarLoop]: Abstraction has 41 states and 45 transitions. [2020-10-14 18:21:22,360 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-14 18:21:22,360 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 45 transitions. [2020-10-14 18:21:22,361 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-10-14 18:21:22,361 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 18:21:22,361 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, 1] [2020-10-14 18:21:22,361 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-14 18:21:22,362 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 18:21:22,362 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 18:21:22,362 INFO L82 PathProgramCache]: Analyzing trace with hash -581903148, now seen corresponding path program 7 times [2020-10-14 18:21:22,363 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 18:21:22,364 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1219220821] [2020-10-14 18:21:22,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 18:21:22,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:21:22,397 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:21:22,421 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:21:23,144 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:21:23,144 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 44 [2020-10-14 18:21:23,145 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 18:21:23,145 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 757 [2020-10-14 18:21:23,145 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:21:23,146 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:21:23,146 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-14 18:21:23,146 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-14 18:21:23,147 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-14 18:21:23,147 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 18:21:23,181 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 18:21:23,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:21:23,185 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:21:23,187 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:21:23,188 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 18:21:23,188 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:21:23,189 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-14 18:21:23,190 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:21:23,192 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:21:23,192 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:21:23,193 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:21:23,193 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:21:23,194 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-10-14 18:21:23,212 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-14 18:21:23,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:21:23,230 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:21:23,414 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:21:23,414 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 23 [2020-10-14 18:21:23,415 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:21:23,415 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 190 [2020-10-14 18:21:23,415 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:21:23,415 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:21:23,416 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-14 18:21:23,416 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-14 18:21:23,416 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-14 18:21:23,416 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 18:21:23,539 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 18:21:23,539 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1219220821] [2020-10-14 18:21:23,539 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 18:21:23,540 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-14 18:21:23,540 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [757974928] [2020-10-14 18:21:23,540 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-14 18:21:23,540 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 18:21:23,541 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-14 18:21:23,541 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2020-10-14 18:21:23,541 INFO L87 Difference]: Start difference. First operand 41 states and 45 transitions. Second operand 13 states. [2020-10-14 18:21:23,748 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 18:21:23,749 INFO L93 Difference]: Finished difference Result 62 states and 70 transitions. [2020-10-14 18:21:23,750 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-14 18:21:23,750 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 34 [2020-10-14 18:21:23,750 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 18:21:23,751 INFO L225 Difference]: With dead ends: 62 [2020-10-14 18:21:23,751 INFO L226 Difference]: Without dead ends: 44 [2020-10-14 18:21:23,752 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=72, Invalid=168, Unknown=0, NotChecked=0, Total=240 [2020-10-14 18:21:23,752 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2020-10-14 18:21:23,757 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 43. [2020-10-14 18:21:23,757 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2020-10-14 18:21:23,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 47 transitions. [2020-10-14 18:21:23,758 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 47 transitions. Word has length 34 [2020-10-14 18:21:23,759 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 18:21:23,759 INFO L479 AbstractCegarLoop]: Abstraction has 43 states and 47 transitions. [2020-10-14 18:21:23,759 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-14 18:21:23,759 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 47 transitions. [2020-10-14 18:21:23,760 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-10-14 18:21:23,760 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 18:21:23,760 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, 1] [2020-10-14 18:21:23,760 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-14 18:21:23,761 INFO L427 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 18:21:23,761 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 18:21:23,761 INFO L82 PathProgramCache]: Analyzing trace with hash -1971119530, now seen corresponding path program 8 times [2020-10-14 18:21:23,761 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 18:21:23,761 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [299752558] [2020-10-14 18:21:23,762 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 18:21:23,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:21:23,789 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:21:23,811 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:21:24,433 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:21:24,433 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 46 [2020-10-14 18:21:24,433 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 18:21:24,433 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 653 [2020-10-14 18:21:24,434 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:21:24,434 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:21:24,434 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-14 18:21:24,434 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-14 18:21:24,435 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-14 18:21:24,435 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 18:21:24,457 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 18:21:24,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:21:24,459 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:21:24,460 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:21:24,460 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 18:21:24,460 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:21:24,461 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 18:21:24,461 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:21:24,461 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:21:24,461 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:21:24,462 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:21:24,462 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:21:24,462 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 18:21:24,474 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-14 18:21:24,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:21:24,492 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:21:24,681 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:21:24,682 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-10-14 18:21:24,682 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:21:24,682 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 196 [2020-10-14 18:21:24,682 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:21:24,682 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:21:24,683 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-14 18:21:24,683 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-14 18:21:24,683 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-14 18:21:24,683 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 18:21:25,091 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 18:21:25,092 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [299752558] [2020-10-14 18:21:25,092 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 18:21:25,092 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-14 18:21:25,093 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [107395606] [2020-10-14 18:21:25,093 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-14 18:21:25,093 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 18:21:25,094 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-14 18:21:25,094 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=121, Unknown=0, NotChecked=0, Total=182 [2020-10-14 18:21:25,094 INFO L87 Difference]: Start difference. First operand 43 states and 47 transitions. Second operand 14 states. [2020-10-14 18:21:25,406 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 18:21:25,406 INFO L93 Difference]: Finished difference Result 64 states and 72 transitions. [2020-10-14 18:21:25,407 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-14 18:21:25,407 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 36 [2020-10-14 18:21:25,407 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 18:21:25,408 INFO L225 Difference]: With dead ends: 64 [2020-10-14 18:21:25,408 INFO L226 Difference]: Without dead ends: 46 [2020-10-14 18:21:25,409 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=91, Invalid=181, Unknown=0, NotChecked=0, Total=272 [2020-10-14 18:21:25,410 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2020-10-14 18:21:25,414 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 45. [2020-10-14 18:21:25,415 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-10-14 18:21:25,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 49 transitions. [2020-10-14 18:21:25,416 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 49 transitions. Word has length 36 [2020-10-14 18:21:25,416 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 18:21:25,416 INFO L479 AbstractCegarLoop]: Abstraction has 45 states and 49 transitions. [2020-10-14 18:21:25,417 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-14 18:21:25,417 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 49 transitions. [2020-10-14 18:21:25,417 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-10-14 18:21:25,418 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 18:21:25,418 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, 1] [2020-10-14 18:21:25,418 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-14 18:21:25,418 INFO L427 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 18:21:25,419 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 18:21:25,419 INFO L82 PathProgramCache]: Analyzing trace with hash -1273233576, now seen corresponding path program 9 times [2020-10-14 18:21:25,419 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 18:21:25,420 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1497250473] [2020-10-14 18:21:25,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 18:21:25,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:21:25,454 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:21:25,474 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:21:26,232 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:21:26,233 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 48 [2020-10-14 18:21:26,233 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 18:21:26,234 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 790 [2020-10-14 18:21:26,234 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:21:26,235 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:21:26,235 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-14 18:21:26,235 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-14 18:21:26,236 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-14 18:21:26,236 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 18:21:26,265 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 18:21:26,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:21:26,268 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:21:26,269 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:21:26,270 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 18:21:26,270 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:21:26,271 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-14 18:21:26,271 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:21:26,271 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:21:26,272 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:21:26,272 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:21:26,273 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:21:26,273 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-14 18:21:26,292 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-14 18:21:26,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:21:26,318 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:21:26,613 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:21:26,614 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 27 [2020-10-14 18:21:26,614 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:21:26,614 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 305 [2020-10-14 18:21:26,615 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:21:26,615 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:21:26,616 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-14 18:21:26,616 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-14 18:21:26,616 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-10-14 18:21:26,617 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 18:21:27,228 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 18:21:27,229 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1497250473] [2020-10-14 18:21:27,229 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 18:21:27,229 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-14 18:21:27,230 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1205988196] [2020-10-14 18:21:27,230 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-14 18:21:27,231 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 18:21:27,231 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-14 18:21:27,231 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=138, Unknown=0, NotChecked=0, Total=210 [2020-10-14 18:21:27,232 INFO L87 Difference]: Start difference. First operand 45 states and 49 transitions. Second operand 15 states. [2020-10-14 18:21:27,601 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 18:21:27,601 INFO L93 Difference]: Finished difference Result 66 states and 74 transitions. [2020-10-14 18:21:27,602 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-14 18:21:27,602 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 38 [2020-10-14 18:21:27,603 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 18:21:27,603 INFO L225 Difference]: With dead ends: 66 [2020-10-14 18:21:27,604 INFO L226 Difference]: Without dead ends: 48 [2020-10-14 18:21:27,605 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=104, Invalid=202, Unknown=0, NotChecked=0, Total=306 [2020-10-14 18:21:27,605 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2020-10-14 18:21:27,610 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 47. [2020-10-14 18:21:27,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2020-10-14 18:21:27,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 51 transitions. [2020-10-14 18:21:27,611 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 51 transitions. Word has length 38 [2020-10-14 18:21:27,611 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 18:21:27,611 INFO L479 AbstractCegarLoop]: Abstraction has 47 states and 51 transitions. [2020-10-14 18:21:27,611 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-14 18:21:27,612 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 51 transitions. [2020-10-14 18:21:27,612 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-10-14 18:21:27,612 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 18:21:27,613 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, 1] [2020-10-14 18:21:27,613 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-14 18:21:27,613 INFO L427 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 18:21:27,613 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 18:21:27,613 INFO L82 PathProgramCache]: Analyzing trace with hash -619729958, now seen corresponding path program 10 times [2020-10-14 18:21:27,614 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 18:21:27,614 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1055171017] [2020-10-14 18:21:27,614 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 18:21:27,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:21:27,647 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:21:27,675 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:21:28,600 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:21:28,600 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 50 [2020-10-14 18:21:28,600 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 18:21:28,601 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 967 [2020-10-14 18:21:28,601 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:21:28,601 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:21:28,601 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-14 18:21:28,601 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-14 18:21:28,602 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-10-14 18:21:28,602 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 18:21:28,631 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 18:21:28,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:21:28,633 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:21:28,634 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:21:28,634 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 18:21:28,634 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:21:28,635 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 18:21:28,635 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:21:28,635 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:21:28,635 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:21:28,635 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:21:28,636 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:21:28,636 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 18:21:28,649 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-14 18:21:28,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:21:28,669 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:21:29,044 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:21:29,044 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 29 [2020-10-14 18:21:29,045 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:21:29,045 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 383 [2020-10-14 18:21:29,045 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:21:29,046 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:21:29,046 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-14 18:21:29,047 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-14 18:21:29,047 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-14 18:21:29,047 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 18:21:29,744 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 18:21:29,744 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1055171017] [2020-10-14 18:21:29,745 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 18:21:29,745 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-14 18:21:29,746 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [309569035] [2020-10-14 18:21:29,747 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-14 18:21:29,747 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 18:21:29,747 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-14 18:21:29,748 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=156, Unknown=0, NotChecked=0, Total=240 [2020-10-14 18:21:29,748 INFO L87 Difference]: Start difference. First operand 47 states and 51 transitions. Second operand 16 states. [2020-10-14 18:21:30,141 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 18:21:30,141 INFO L93 Difference]: Finished difference Result 68 states and 76 transitions. [2020-10-14 18:21:30,142 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-14 18:21:30,142 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 40 [2020-10-14 18:21:30,143 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 18:21:30,143 INFO L225 Difference]: With dead ends: 68 [2020-10-14 18:21:30,144 INFO L226 Difference]: Without dead ends: 50 [2020-10-14 18:21:30,148 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=118, Invalid=224, Unknown=0, NotChecked=0, Total=342 [2020-10-14 18:21:30,149 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2020-10-14 18:21:30,161 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 49. [2020-10-14 18:21:30,161 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2020-10-14 18:21:30,162 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 53 transitions. [2020-10-14 18:21:30,162 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 53 transitions. Word has length 40 [2020-10-14 18:21:30,163 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 18:21:30,163 INFO L479 AbstractCegarLoop]: Abstraction has 49 states and 53 transitions. [2020-10-14 18:21:30,163 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-14 18:21:30,163 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 53 transitions. [2020-10-14 18:21:30,166 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-10-14 18:21:30,168 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 18:21:30,169 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, 1] [2020-10-14 18:21:30,169 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-14 18:21:30,169 INFO L427 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 18:21:30,170 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 18:21:30,170 INFO L82 PathProgramCache]: Analyzing trace with hash 332021724, now seen corresponding path program 11 times [2020-10-14 18:21:30,170 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 18:21:30,171 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [531779087] [2020-10-14 18:21:30,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 18:21:30,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:21:30,208 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:21:30,271 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:21:31,566 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:21:31,566 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 52 [2020-10-14 18:21:31,567 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 18:21:31,567 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1373 [2020-10-14 18:21:31,567 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:21:31,567 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:21:31,567 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-14 18:21:31,568 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-14 18:21:31,568 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-14 18:21:31,568 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 18:21:31,591 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 18:21:31,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:21:31,595 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:21:31,598 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:21:31,599 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 18:21:31,599 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:21:31,599 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-14 18:21:31,600 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:21:31,600 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:21:31,600 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:21:31,601 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:21:31,601 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:21:31,601 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 18:21:31,614 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-14 18:21:31,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:21:31,636 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:21:31,979 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:21:31,979 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 31 [2020-10-14 18:21:31,979 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:21:31,980 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 352 [2020-10-14 18:21:31,980 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:21:31,980 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:21:31,980 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-14 18:21:31,981 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-14 18:21:31,981 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-10-14 18:21:31,981 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 18:21:32,181 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 18:21:32,182 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [531779087] [2020-10-14 18:21:32,182 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 18:21:32,182 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-14 18:21:32,183 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [758314468] [2020-10-14 18:21:32,184 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-14 18:21:32,184 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 18:21:32,185 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-14 18:21:32,185 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=175, Unknown=0, NotChecked=0, Total=272 [2020-10-14 18:21:32,186 INFO L87 Difference]: Start difference. First operand 49 states and 53 transitions. Second operand 17 states. [2020-10-14 18:21:32,476 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 18:21:32,476 INFO L93 Difference]: Finished difference Result 70 states and 78 transitions. [2020-10-14 18:21:32,477 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-14 18:21:32,477 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 42 [2020-10-14 18:21:32,477 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 18:21:32,478 INFO L225 Difference]: With dead ends: 70 [2020-10-14 18:21:32,478 INFO L226 Difference]: Without dead ends: 52 [2020-10-14 18:21:32,479 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=122, Invalid=258, Unknown=0, NotChecked=0, Total=380 [2020-10-14 18:21:32,480 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2020-10-14 18:21:32,489 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 51. [2020-10-14 18:21:32,489 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-10-14 18:21:32,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 55 transitions. [2020-10-14 18:21:32,491 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 55 transitions. Word has length 42 [2020-10-14 18:21:32,491 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 18:21:32,491 INFO L479 AbstractCegarLoop]: Abstraction has 51 states and 55 transitions. [2020-10-14 18:21:32,492 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-14 18:21:32,492 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 55 transitions. [2020-10-14 18:21:32,492 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2020-10-14 18:21:32,492 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 18:21:32,493 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, 1] [2020-10-14 18:21:32,493 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-14 18:21:32,493 INFO L427 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 18:21:32,493 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 18:21:32,493 INFO L82 PathProgramCache]: Analyzing trace with hash 137354078, now seen corresponding path program 12 times [2020-10-14 18:21:32,494 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 18:21:32,494 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [749178524] [2020-10-14 18:21:32,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 18:21:32,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:21:32,527 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:21:32,564 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:21:33,494 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:21:33,494 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 54 [2020-10-14 18:21:33,494 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 18:21:33,495 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 980 [2020-10-14 18:21:33,495 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:21:33,495 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:21:33,495 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-14 18:21:33,495 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-14 18:21:33,496 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-10-14 18:21:33,496 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 18:21:33,522 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 18:21:33,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:21:33,524 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:21:33,525 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:21:33,526 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 18:21:33,526 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:21:33,526 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 18:21:33,526 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:21:33,527 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:21:33,527 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:21:33,527 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:21:33,527 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:21:33,528 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 18:21:33,540 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-14 18:21:33,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:21:33,562 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:21:33,957 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:21:33,958 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 33 [2020-10-14 18:21:33,958 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:21:33,958 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 405 [2020-10-14 18:21:33,958 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:21:33,959 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:21:33,959 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-14 18:21:33,959 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-14 18:21:33,959 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-14 18:21:33,960 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 18:21:34,496 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 18:21:34,497 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [749178524] [2020-10-14 18:21:34,497 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 18:21:34,497 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-14 18:21:34,497 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [887118720] [2020-10-14 18:21:34,498 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-14 18:21:34,498 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 18:21:34,499 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-14 18:21:34,499 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=195, Unknown=0, NotChecked=0, Total=306 [2020-10-14 18:21:34,499 INFO L87 Difference]: Start difference. First operand 51 states and 55 transitions. Second operand 18 states. [2020-10-14 18:21:34,838 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 18:21:34,838 INFO L93 Difference]: Finished difference Result 72 states and 80 transitions. [2020-10-14 18:21:34,839 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-14 18:21:34,839 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 44 [2020-10-14 18:21:34,839 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 18:21:34,840 INFO L225 Difference]: With dead ends: 72 [2020-10-14 18:21:34,840 INFO L226 Difference]: Without dead ends: 54 [2020-10-14 18:21:34,841 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=149, Invalid=271, Unknown=0, NotChecked=0, Total=420 [2020-10-14 18:21:34,841 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-10-14 18:21:34,855 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 53. [2020-10-14 18:21:34,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2020-10-14 18:21:34,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 57 transitions. [2020-10-14 18:21:34,859 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 57 transitions. Word has length 44 [2020-10-14 18:21:34,860 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 18:21:34,860 INFO L479 AbstractCegarLoop]: Abstraction has 53 states and 57 transitions. [2020-10-14 18:21:34,860 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-14 18:21:34,860 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 57 transitions. [2020-10-14 18:21:34,863 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-10-14 18:21:34,863 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 18:21:34,863 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, 1] [2020-10-14 18:21:34,864 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-14 18:21:34,864 INFO L427 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 18:21:34,864 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 18:21:34,865 INFO L82 PathProgramCache]: Analyzing trace with hash 2040307296, now seen corresponding path program 13 times [2020-10-14 18:21:34,865 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 18:21:34,866 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [398337975] [2020-10-14 18:21:34,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 18:21:34,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:21:34,908 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:21:34,942 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:21:36,254 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:21:36,255 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 56 [2020-10-14 18:21:36,255 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 18:21:36,255 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1362 [2020-10-14 18:21:36,255 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:21:36,255 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:21:36,256 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-14 18:21:36,256 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-14 18:21:36,256 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-14 18:21:36,256 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:21:36,283 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 18:21:36,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:21:36,284 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:21:36,286 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:21:36,286 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 18:21:36,286 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:21:36,286 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 18:21:36,286 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:21:36,287 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:21:36,287 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:21:36,287 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:21:36,287 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:21:36,287 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 18:21:36,299 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-14 18:21:36,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:21:36,339 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:21:36,676 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:21:36,676 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 35 [2020-10-14 18:21:36,677 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:21:36,677 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 365 [2020-10-14 18:21:36,677 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:21:36,677 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:21:36,678 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-14 18:21:36,678 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-14 18:21:36,678 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-14 18:21:36,678 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 18:21:36,929 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 18:21:36,930 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [398337975] [2020-10-14 18:21:36,930 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 18:21:36,930 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-10-14 18:21:36,930 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [120699865] [2020-10-14 18:21:36,931 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-14 18:21:36,931 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 18:21:36,932 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-14 18:21:36,932 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=216, Unknown=0, NotChecked=0, Total=342 [2020-10-14 18:21:36,932 INFO L87 Difference]: Start difference. First operand 53 states and 57 transitions. Second operand 19 states. [2020-10-14 18:21:37,186 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 18:21:37,187 INFO L93 Difference]: Finished difference Result 74 states and 82 transitions. [2020-10-14 18:21:37,187 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-14 18:21:37,187 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 46 [2020-10-14 18:21:37,188 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 18:21:37,189 INFO L225 Difference]: With dead ends: 74 [2020-10-14 18:21:37,189 INFO L226 Difference]: Without dead ends: 56 [2020-10-14 18:21:37,190 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=153, Invalid=309, Unknown=0, NotChecked=0, Total=462 [2020-10-14 18:21:37,191 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2020-10-14 18:21:37,198 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 55. [2020-10-14 18:21:37,199 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2020-10-14 18:21:37,200 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 59 transitions. [2020-10-14 18:21:37,200 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 59 transitions. Word has length 46 [2020-10-14 18:21:37,200 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 18:21:37,201 INFO L479 AbstractCegarLoop]: Abstraction has 55 states and 59 transitions. [2020-10-14 18:21:37,201 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-14 18:21:37,201 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 59 transitions. [2020-10-14 18:21:37,203 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-10-14 18:21:37,203 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 18:21:37,203 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, 1] [2020-10-14 18:21:37,203 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-14 18:21:37,203 INFO L427 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 18:21:37,204 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 18:21:37,204 INFO L82 PathProgramCache]: Analyzing trace with hash 1122281698, now seen corresponding path program 14 times [2020-10-14 18:21:37,204 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 18:21:37,204 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [824641319] [2020-10-14 18:21:37,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 18:21:37,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:21:37,238 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:21:37,262 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:21:38,583 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:21:38,584 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 58 [2020-10-14 18:21:38,584 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 18:21:38,584 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1358 [2020-10-14 18:21:38,584 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:21:38,585 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:21:38,585 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-14 18:21:38,585 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-14 18:21:38,585 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-14 18:21:38,586 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 18:21:38,610 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 18:21:38,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:21:38,612 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:21:38,613 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:21:38,613 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 18:21:38,613 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:21:38,613 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 18:21:38,614 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:21:38,614 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:21:38,614 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:21:38,615 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:21:38,615 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:21:38,615 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 18:21:38,627 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-14 18:21:38,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:21:38,653 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:21:39,009 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:21:39,009 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 37 [2020-10-14 18:21:39,009 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:21:39,009 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 366 [2020-10-14 18:21:39,010 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:21:39,010 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:21:39,010 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-14 18:21:39,010 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-14 18:21:39,011 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 34 [2020-10-14 18:21:39,011 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 18:21:39,322 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 18:21:39,323 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [824641319] [2020-10-14 18:21:39,323 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 18:21:39,323 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-10-14 18:21:39,324 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1345020481] [2020-10-14 18:21:39,324 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-14 18:21:39,324 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 18:21:39,324 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-14 18:21:39,325 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=142, Invalid=238, Unknown=0, NotChecked=0, Total=380 [2020-10-14 18:21:39,325 INFO L87 Difference]: Start difference. First operand 55 states and 59 transitions. Second operand 20 states. [2020-10-14 18:21:39,569 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 18:21:39,569 INFO L93 Difference]: Finished difference Result 76 states and 84 transitions. [2020-10-14 18:21:39,570 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-14 18:21:39,570 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 48 [2020-10-14 18:21:39,570 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 18:21:39,571 INFO L225 Difference]: With dead ends: 76 [2020-10-14 18:21:39,571 INFO L226 Difference]: Without dead ends: 58 [2020-10-14 18:21:39,572 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=170, Invalid=336, Unknown=0, NotChecked=0, Total=506 [2020-10-14 18:21:39,572 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2020-10-14 18:21:39,576 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 57. [2020-10-14 18:21:39,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-10-14 18:21:39,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 61 transitions. [2020-10-14 18:21:39,577 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 61 transitions. Word has length 48 [2020-10-14 18:21:39,577 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 18:21:39,577 INFO L479 AbstractCegarLoop]: Abstraction has 57 states and 61 transitions. [2020-10-14 18:21:39,577 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-14 18:21:39,577 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 61 transitions. [2020-10-14 18:21:39,578 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2020-10-14 18:21:39,578 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 18:21:39,578 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, 1] [2020-10-14 18:21:39,578 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-14 18:21:39,578 INFO L427 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 18:21:39,579 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 18:21:39,579 INFO L82 PathProgramCache]: Analyzing trace with hash -632022300, now seen corresponding path program 15 times [2020-10-14 18:21:39,579 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 18:21:39,579 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [19199278] [2020-10-14 18:21:39,579 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 18:21:39,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:21:39,608 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:21:39,630 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:21:40,983 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:21:40,983 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 60 [2020-10-14 18:21:40,983 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 18:21:40,984 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1385 [2020-10-14 18:21:40,984 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:21:40,984 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:21:40,984 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-14 18:21:40,984 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-14 18:21:40,985 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 34 [2020-10-14 18:21:40,985 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:21:41,007 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 18:21:41,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:21:41,009 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:21:41,010 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:21:41,010 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 18:21:41,010 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:21:41,010 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 18:21:41,010 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:21:41,011 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:21:41,011 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:21:41,011 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:21:41,011 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:21:41,011 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:21:41,024 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-14 18:21:41,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:21:41,049 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:21:41,502 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:21:41,502 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 39 [2020-10-14 18:21:41,502 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:21:41,503 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 462 [2020-10-14 18:21:41,503 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:21:41,503 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:21:41,503 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-14 18:21:41,504 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-14 18:21:41,504 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 36 [2020-10-14 18:21:41,504 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 18:21:41,784 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 18:21:41,785 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [19199278] [2020-10-14 18:21:41,787 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 18:21:41,787 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-10-14 18:21:41,787 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1593249820] [2020-10-14 18:21:41,788 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-14 18:21:41,788 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 18:21:41,788 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-14 18:21:41,788 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=159, Invalid=261, Unknown=0, NotChecked=0, Total=420 [2020-10-14 18:21:41,789 INFO L87 Difference]: Start difference. First operand 57 states and 61 transitions. Second operand 21 states. [2020-10-14 18:21:42,044 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 18:21:42,045 INFO L93 Difference]: Finished difference Result 78 states and 86 transitions. [2020-10-14 18:21:42,045 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-14 18:21:42,045 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 50 [2020-10-14 18:21:42,046 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 18:21:42,046 INFO L225 Difference]: With dead ends: 78 [2020-10-14 18:21:42,046 INFO L226 Difference]: Without dead ends: 60 [2020-10-14 18:21:42,047 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=188, Invalid=364, Unknown=0, NotChecked=0, Total=552 [2020-10-14 18:21:42,047 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2020-10-14 18:21:42,053 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 59. [2020-10-14 18:21:42,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2020-10-14 18:21:42,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 63 transitions. [2020-10-14 18:21:42,054 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 63 transitions. Word has length 50 [2020-10-14 18:21:42,054 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 18:21:42,054 INFO L479 AbstractCegarLoop]: Abstraction has 59 states and 63 transitions. [2020-10-14 18:21:42,054 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-14 18:21:42,055 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 63 transitions. [2020-10-14 18:21:42,055 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-10-14 18:21:42,055 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 18:21:42,055 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, 1] [2020-10-14 18:21:42,055 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-14 18:21:42,056 INFO L427 AbstractCegarLoop]: === Iteration 17 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 18:21:42,056 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 18:21:42,056 INFO L82 PathProgramCache]: Analyzing trace with hash 1403982950, now seen corresponding path program 16 times [2020-10-14 18:21:42,056 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 18:21:42,056 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1703389203] [2020-10-14 18:21:42,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 18:21:42,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:21:42,086 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:21:42,106 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:21:43,627 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:21:43,627 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 62 [2020-10-14 18:21:43,627 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 18:21:43,628 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1551 [2020-10-14 18:21:43,628 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:21:43,628 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:21:43,628 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 19 [2020-10-14 18:21:43,629 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-14 18:21:43,629 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 36 [2020-10-14 18:21:43,629 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 18:21:43,656 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 18:21:43,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:21:43,658 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:21:43,660 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:21:43,661 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 18:21:43,661 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:21:43,661 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-14 18:21:43,661 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:21:43,661 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:21:43,662 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:21:43,662 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:21:43,662 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:21:43,662 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:21:43,674 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-14 18:21:43,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:21:43,698 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:21:44,126 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:21:44,126 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 41 [2020-10-14 18:21:44,127 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:21:44,127 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 437 [2020-10-14 18:21:44,127 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:21:44,127 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:21:44,127 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 19 [2020-10-14 18:21:44,128 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-14 18:21:44,128 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 38 [2020-10-14 18:21:44,128 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:21:44,470 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 18:21:44,470 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1703389203] [2020-10-14 18:21:44,471 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 18:21:44,471 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-10-14 18:21:44,471 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1500238564] [2020-10-14 18:21:44,471 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-14 18:21:44,472 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 18:21:44,472 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-14 18:21:44,472 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=177, Invalid=285, Unknown=0, NotChecked=0, Total=462 [2020-10-14 18:21:44,472 INFO L87 Difference]: Start difference. First operand 59 states and 63 transitions. Second operand 22 states. [2020-10-14 18:21:44,748 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 18:21:44,748 INFO L93 Difference]: Finished difference Result 80 states and 88 transitions. [2020-10-14 18:21:44,748 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-14 18:21:44,749 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 52 [2020-10-14 18:21:44,749 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 18:21:44,749 INFO L225 Difference]: With dead ends: 80 [2020-10-14 18:21:44,749 INFO L226 Difference]: Without dead ends: 62 [2020-10-14 18:21:44,750 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=207, Invalid=393, Unknown=0, NotChecked=0, Total=600 [2020-10-14 18:21:44,751 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2020-10-14 18:21:44,754 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 61. [2020-10-14 18:21:44,754 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2020-10-14 18:21:44,754 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 65 transitions. [2020-10-14 18:21:44,755 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 65 transitions. Word has length 52 [2020-10-14 18:21:44,755 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 18:21:44,755 INFO L479 AbstractCegarLoop]: Abstraction has 61 states and 65 transitions. [2020-10-14 18:21:44,755 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-14 18:21:44,755 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 65 transitions. [2020-10-14 18:21:44,756 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-10-14 18:21:44,756 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 18:21:44,756 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, 1] [2020-10-14 18:21:44,756 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-14 18:21:44,756 INFO L427 AbstractCegarLoop]: === Iteration 18 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 18:21:44,757 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 18:21:44,757 INFO L82 PathProgramCache]: Analyzing trace with hash -500058776, now seen corresponding path program 17 times [2020-10-14 18:21:44,757 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 18:21:44,757 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [514470579] [2020-10-14 18:21:44,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 18:21:44,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:21:44,786 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:21:44,807 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:21:46,198 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:21:46,198 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 64 [2020-10-14 18:21:46,198 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 18:21:46,199 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1423 [2020-10-14 18:21:46,199 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:21:46,199 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:21:46,199 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-10-14 18:21:46,199 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-14 18:21:46,199 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 38 [2020-10-14 18:21:46,200 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:21:46,227 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 18:21:46,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:21:46,229 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:21:46,230 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:21:46,230 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 18:21:46,230 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:21:46,230 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 18:21:46,231 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:21:46,231 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:21:46,231 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:21:46,231 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:21:46,231 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:21:46,231 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:21:46,242 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-14 18:21:46,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:21:46,266 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:21:46,653 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:21:46,654 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 43 [2020-10-14 18:21:46,654 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:21:46,654 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 397 [2020-10-14 18:21:46,654 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:21:46,654 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:21:46,654 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-10-14 18:21:46,654 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-14 18:21:46,654 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 40 [2020-10-14 18:21:46,654 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:21:46,992 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 18:21:46,992 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [514470579] [2020-10-14 18:21:46,992 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 18:21:46,992 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-10-14 18:21:46,993 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [329677676] [2020-10-14 18:21:46,993 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-14 18:21:46,993 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 18:21:46,994 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-14 18:21:46,994 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=196, Invalid=310, Unknown=0, NotChecked=0, Total=506 [2020-10-14 18:21:46,994 INFO L87 Difference]: Start difference. First operand 61 states and 65 transitions. Second operand 23 states. [2020-10-14 18:21:47,235 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 18:21:47,236 INFO L93 Difference]: Finished difference Result 82 states and 90 transitions. [2020-10-14 18:21:47,237 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-14 18:21:47,237 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 54 [2020-10-14 18:21:47,238 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 18:21:47,238 INFO L225 Difference]: With dead ends: 82 [2020-10-14 18:21:47,238 INFO L226 Difference]: Without dead ends: 64 [2020-10-14 18:21:47,239 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=227, Invalid=423, Unknown=0, NotChecked=0, Total=650 [2020-10-14 18:21:47,240 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2020-10-14 18:21:47,243 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 63. [2020-10-14 18:21:47,243 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2020-10-14 18:21:47,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 67 transitions. [2020-10-14 18:21:47,244 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 67 transitions. Word has length 54 [2020-10-14 18:21:47,245 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 18:21:47,245 INFO L479 AbstractCegarLoop]: Abstraction has 63 states and 67 transitions. [2020-10-14 18:21:47,245 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-14 18:21:47,245 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 67 transitions. [2020-10-14 18:21:47,245 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-10-14 18:21:47,245 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 18:21:47,246 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, 1] [2020-10-14 18:21:47,246 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-14 18:21:47,246 INFO L427 AbstractCegarLoop]: === Iteration 19 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 18:21:47,246 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 18:21:47,246 INFO L82 PathProgramCache]: Analyzing trace with hash -628089366, now seen corresponding path program 18 times [2020-10-14 18:21:47,247 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 18:21:47,247 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2113436420] [2020-10-14 18:21:47,247 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 18:21:47,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:21:47,276 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:21:47,314 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:21:48,674 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:21:48,675 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 66 [2020-10-14 18:21:48,675 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 18:21:48,675 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1409 [2020-10-14 18:21:48,676 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:21:48,676 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:21:48,676 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 21 [2020-10-14 18:21:48,677 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-14 18:21:48,677 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 40 [2020-10-14 18:21:48,677 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 18:21:48,711 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 18:21:48,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:21:48,713 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:21:48,714 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:21:48,714 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 18:21:48,715 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:21:48,715 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 18:21:48,715 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:21:48,716 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:21:48,716 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:21:48,716 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:21:48,717 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:21:48,717 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 18:21:48,730 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-14 18:21:48,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:21:48,767 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:21:49,349 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:21:49,349 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 45 [2020-10-14 18:21:49,349 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:21:49,350 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 598 [2020-10-14 18:21:49,350 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:21:49,350 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:21:49,350 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 21 [2020-10-14 18:21:49,350 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-14 18:21:49,350 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 42 [2020-10-14 18:21:49,350 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:21:49,870 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 18:21:49,870 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2113436420] [2020-10-14 18:21:49,870 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 18:21:49,871 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2020-10-14 18:21:49,871 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [253663796] [2020-10-14 18:21:49,871 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-14 18:21:49,872 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 18:21:49,872 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-14 18:21:49,872 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=216, Invalid=336, Unknown=0, NotChecked=0, Total=552 [2020-10-14 18:21:49,872 INFO L87 Difference]: Start difference. First operand 63 states and 67 transitions. Second operand 24 states. [2020-10-14 18:21:50,229 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 18:21:50,230 INFO L93 Difference]: Finished difference Result 84 states and 92 transitions. [2020-10-14 18:21:50,230 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-14 18:21:50,230 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 56 [2020-10-14 18:21:50,230 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 18:21:50,231 INFO L225 Difference]: With dead ends: 84 [2020-10-14 18:21:50,231 INFO L226 Difference]: Without dead ends: 66 [2020-10-14 18:21:50,232 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=248, Invalid=454, Unknown=0, NotChecked=0, Total=702 [2020-10-14 18:21:50,232 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2020-10-14 18:21:50,238 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 65. [2020-10-14 18:21:50,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2020-10-14 18:21:50,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 69 transitions. [2020-10-14 18:21:50,240 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 69 transitions. Word has length 56 [2020-10-14 18:21:50,240 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 18:21:50,240 INFO L479 AbstractCegarLoop]: Abstraction has 65 states and 69 transitions. [2020-10-14 18:21:50,240 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-14 18:21:50,241 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 69 transitions. [2020-10-14 18:21:50,243 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-10-14 18:21:50,243 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 18:21:50,243 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, 1] [2020-10-14 18:21:50,243 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-14 18:21:50,243 INFO L427 AbstractCegarLoop]: === Iteration 20 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 18:21:50,243 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 18:21:50,244 INFO L82 PathProgramCache]: Analyzing trace with hash 888565228, now seen corresponding path program 19 times [2020-10-14 18:21:50,244 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 18:21:50,246 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1924718711] [2020-10-14 18:21:50,246 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 18:21:50,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:21:50,289 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:21:50,334 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:21:51,964 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:21:51,965 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 68 [2020-10-14 18:21:51,965 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 18:21:51,965 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1690 [2020-10-14 18:21:51,965 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:21:51,965 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:21:51,965 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 22 [2020-10-14 18:21:51,966 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-14 18:21:51,966 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 42 [2020-10-14 18:21:51,966 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:21:51,988 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 18:21:51,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:21:51,989 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:21:51,990 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:21:51,991 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 18:21:51,991 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:21:51,991 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 18:21:51,991 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:21:51,991 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:21:51,992 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:21:51,992 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:21:51,992 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:21:51,992 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:21:52,004 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-14 18:21:52,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:21:52,030 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:21:52,589 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:21:52,589 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 47 [2020-10-14 18:21:52,589 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:21:52,589 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 570 [2020-10-14 18:21:52,589 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:21:52,589 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:21:52,590 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 22 [2020-10-14 18:21:52,590 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-14 18:21:52,590 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 44 [2020-10-14 18:21:52,590 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:21:53,005 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 18:21:53,005 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1924718711] [2020-10-14 18:21:53,005 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 18:21:53,005 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2020-10-14 18:21:53,006 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [243409352] [2020-10-14 18:21:53,006 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-14 18:21:53,006 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 18:21:53,006 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-14 18:21:53,007 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=237, Invalid=363, Unknown=0, NotChecked=0, Total=600 [2020-10-14 18:21:53,007 INFO L87 Difference]: Start difference. First operand 65 states and 69 transitions. Second operand 25 states. [2020-10-14 18:21:53,373 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 18:21:53,373 INFO L93 Difference]: Finished difference Result 86 states and 94 transitions. [2020-10-14 18:21:53,374 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-14 18:21:53,374 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 58 [2020-10-14 18:21:53,374 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 18:21:53,375 INFO L225 Difference]: With dead ends: 86 [2020-10-14 18:21:53,375 INFO L226 Difference]: Without dead ends: 68 [2020-10-14 18:21:53,376 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=270, Invalid=486, Unknown=0, NotChecked=0, Total=756 [2020-10-14 18:21:53,376 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2020-10-14 18:21:53,381 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 67. [2020-10-14 18:21:53,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2020-10-14 18:21:53,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 71 transitions. [2020-10-14 18:21:53,382 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 71 transitions. Word has length 58 [2020-10-14 18:21:53,382 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 18:21:53,382 INFO L479 AbstractCegarLoop]: Abstraction has 67 states and 71 transitions. [2020-10-14 18:21:53,382 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-14 18:21:53,383 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 71 transitions. [2020-10-14 18:21:53,385 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2020-10-14 18:21:53,385 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 18:21:53,386 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, 1] [2020-10-14 18:21:53,386 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-10-14 18:21:53,386 INFO L427 AbstractCegarLoop]: === Iteration 21 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 18:21:53,386 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 18:21:53,386 INFO L82 PathProgramCache]: Analyzing trace with hash -1895250578, now seen corresponding path program 20 times [2020-10-14 18:21:53,387 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 18:21:53,387 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1466298474] [2020-10-14 18:21:53,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 18:21:53,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:21:53,426 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:21:53,487 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:21:54,628 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:21:54,628 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 70 [2020-10-14 18:21:54,628 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 18:21:54,628 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1218 [2020-10-14 18:21:54,629 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:21:54,629 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:21:54,629 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 23 [2020-10-14 18:21:54,629 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-14 18:21:54,629 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 44 [2020-10-14 18:21:54,629 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:21:54,647 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 18:21:54,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:21:54,648 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:21:54,649 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:21:54,649 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 18:21:54,650 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:21:54,650 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 18:21:54,650 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:21:54,650 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:21:54,650 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:21:54,650 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:21:54,651 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:21:54,651 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:21:54,661 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-14 18:21:54,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:21:54,688 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:21:55,150 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:21:55,150 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 49 [2020-10-14 18:21:55,150 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:21:55,151 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 473 [2020-10-14 18:21:55,151 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:21:55,151 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:21:55,151 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 23 [2020-10-14 18:21:55,151 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-14 18:21:55,151 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 46 [2020-10-14 18:21:55,151 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:21:55,623 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 18:21:55,624 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1466298474] [2020-10-14 18:21:55,624 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 18:21:55,624 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2020-10-14 18:21:55,624 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [393580808] [2020-10-14 18:21:55,625 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-10-14 18:21:55,625 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 18:21:55,625 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-10-14 18:21:55,625 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=259, Invalid=391, Unknown=0, NotChecked=0, Total=650 [2020-10-14 18:21:55,626 INFO L87 Difference]: Start difference. First operand 67 states and 71 transitions. Second operand 26 states. [2020-10-14 18:21:55,914 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 18:21:55,914 INFO L93 Difference]: Finished difference Result 88 states and 96 transitions. [2020-10-14 18:21:55,915 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-14 18:21:55,915 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 60 [2020-10-14 18:21:55,915 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 18:21:55,916 INFO L225 Difference]: With dead ends: 88 [2020-10-14 18:21:55,916 INFO L226 Difference]: Without dead ends: 70 [2020-10-14 18:21:55,918 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=293, Invalid=519, Unknown=0, NotChecked=0, Total=812 [2020-10-14 18:21:55,918 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2020-10-14 18:21:55,922 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 69. [2020-10-14 18:21:55,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2020-10-14 18:21:55,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 73 transitions. [2020-10-14 18:21:55,923 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 73 transitions. Word has length 60 [2020-10-14 18:21:55,923 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 18:21:55,923 INFO L479 AbstractCegarLoop]: Abstraction has 69 states and 73 transitions. [2020-10-14 18:21:55,923 INFO L480 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-10-14 18:21:55,924 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 73 transitions. [2020-10-14 18:21:55,924 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2020-10-14 18:21:55,924 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 18:21:55,924 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, 1] [2020-10-14 18:21:55,925 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-10-14 18:21:55,925 INFO L427 AbstractCegarLoop]: === Iteration 22 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 18:21:55,925 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 18:21:55,925 INFO L82 PathProgramCache]: Analyzing trace with hash -1377614736, now seen corresponding path program 21 times [2020-10-14 18:21:55,925 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 18:21:55,925 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [412126151] [2020-10-14 18:21:55,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 18:21:55,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:21:55,958 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:21:55,976 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:21:57,429 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:21:57,429 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 72 [2020-10-14 18:21:57,429 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 18:21:57,429 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1483 [2020-10-14 18:21:57,429 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:21:57,430 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:21:57,430 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 24 [2020-10-14 18:21:57,430 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-14 18:21:57,430 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 46 [2020-10-14 18:21:57,430 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 18:21:57,451 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 18:21:57,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:21:57,453 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:21:57,454 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:21:57,454 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 18:21:57,454 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:21:57,454 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 18:21:57,454 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:21:57,454 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:21:57,454 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:21:57,454 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:21:57,455 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:21:57,455 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:21:57,469 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-14 18:21:57,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:21:57,496 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:21:57,978 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:21:57,978 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 51 [2020-10-14 18:21:57,978 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:21:57,978 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 493 [2020-10-14 18:21:57,979 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:21:57,979 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:21:57,979 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 24 [2020-10-14 18:21:57,979 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-14 18:21:57,979 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 48 [2020-10-14 18:21:57,980 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:21:58,467 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 18:21:58,468 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [412126151] [2020-10-14 18:21:58,468 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 18:21:58,468 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2020-10-14 18:21:58,469 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [735042074] [2020-10-14 18:21:58,469 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-10-14 18:21:58,469 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 18:21:58,469 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-10-14 18:21:58,470 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=282, Invalid=420, Unknown=0, NotChecked=0, Total=702 [2020-10-14 18:21:58,470 INFO L87 Difference]: Start difference. First operand 69 states and 73 transitions. Second operand 27 states. [2020-10-14 18:21:58,844 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 18:21:58,844 INFO L93 Difference]: Finished difference Result 90 states and 98 transitions. [2020-10-14 18:21:58,847 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-14 18:21:58,847 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 62 [2020-10-14 18:21:58,847 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 18:21:58,848 INFO L225 Difference]: With dead ends: 90 [2020-10-14 18:21:58,848 INFO L226 Difference]: Without dead ends: 72 [2020-10-14 18:21:58,850 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=317, Invalid=553, Unknown=0, NotChecked=0, Total=870 [2020-10-14 18:21:58,850 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2020-10-14 18:21:58,853 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 71. [2020-10-14 18:21:58,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2020-10-14 18:21:58,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 75 transitions. [2020-10-14 18:21:58,854 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 75 transitions. Word has length 62 [2020-10-14 18:21:58,854 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 18:21:58,855 INFO L479 AbstractCegarLoop]: Abstraction has 71 states and 75 transitions. [2020-10-14 18:21:58,855 INFO L480 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-10-14 18:21:58,855 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 75 transitions. [2020-10-14 18:21:58,855 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2020-10-14 18:21:58,855 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 18:21:58,856 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, 1] [2020-10-14 18:21:58,856 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-10-14 18:21:58,856 INFO L427 AbstractCegarLoop]: === Iteration 23 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 18:21:58,856 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 18:21:58,856 INFO L82 PathProgramCache]: Analyzing trace with hash -2145776910, now seen corresponding path program 22 times [2020-10-14 18:21:58,857 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 18:21:58,857 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [787405209] [2020-10-14 18:21:58,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 18:21:58,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:21:58,890 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:21:58,907 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:22:00,460 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:22:00,461 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 74 [2020-10-14 18:22:00,461 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 18:22:00,461 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1580 [2020-10-14 18:22:00,461 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:22:00,461 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:22:00,462 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 25 [2020-10-14 18:22:00,462 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-14 18:22:00,462 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 48 [2020-10-14 18:22:00,462 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:22:00,482 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 18:22:00,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:22:00,484 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:22:00,485 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:22:00,486 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 18:22:00,486 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:22:00,486 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 18:22:00,486 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:22:00,486 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:22:00,486 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:22:00,486 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:22:00,486 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:22:00,487 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:22:00,497 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-14 18:22:00,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:22:00,527 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:22:01,096 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:22:01,096 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 53 [2020-10-14 18:22:01,097 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:22:01,097 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 583 [2020-10-14 18:22:01,097 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:22:01,097 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:22:01,097 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 25 [2020-10-14 18:22:01,097 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-14 18:22:01,097 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 50 [2020-10-14 18:22:01,097 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:22:01,629 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 18:22:01,630 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [787405209] [2020-10-14 18:22:01,630 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 18:22:01,630 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2020-10-14 18:22:01,630 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [596549711] [2020-10-14 18:22:01,631 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-10-14 18:22:01,631 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 18:22:01,631 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-10-14 18:22:01,632 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=306, Invalid=450, Unknown=0, NotChecked=0, Total=756 [2020-10-14 18:22:01,632 INFO L87 Difference]: Start difference. First operand 71 states and 75 transitions. Second operand 28 states. [2020-10-14 18:22:02,014 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 18:22:02,014 INFO L93 Difference]: Finished difference Result 92 states and 100 transitions. [2020-10-14 18:22:02,014 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-14 18:22:02,015 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 64 [2020-10-14 18:22:02,015 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 18:22:02,016 INFO L225 Difference]: With dead ends: 92 [2020-10-14 18:22:02,016 INFO L226 Difference]: Without dead ends: 74 [2020-10-14 18:22:02,017 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=342, Invalid=588, Unknown=0, NotChecked=0, Total=930 [2020-10-14 18:22:02,017 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2020-10-14 18:22:02,021 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 73. [2020-10-14 18:22:02,021 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2020-10-14 18:22:02,021 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 77 transitions. [2020-10-14 18:22:02,022 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 77 transitions. Word has length 64 [2020-10-14 18:22:02,022 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 18:22:02,022 INFO L479 AbstractCegarLoop]: Abstraction has 73 states and 77 transitions. [2020-10-14 18:22:02,022 INFO L480 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-10-14 18:22:02,022 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 77 transitions. [2020-10-14 18:22:02,023 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-10-14 18:22:02,023 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 18:22:02,023 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, 1] [2020-10-14 18:22:02,023 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-10-14 18:22:02,024 INFO L427 AbstractCegarLoop]: === Iteration 24 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 18:22:02,024 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 18:22:02,024 INFO L82 PathProgramCache]: Analyzing trace with hash -1615251212, now seen corresponding path program 23 times [2020-10-14 18:22:02,024 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 18:22:02,024 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [269501367] [2020-10-14 18:22:02,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 18:22:02,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:22:02,059 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:22:02,088 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:22:04,431 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:22:04,432 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 76 [2020-10-14 18:22:04,432 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 18:22:04,432 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2386 [2020-10-14 18:22:04,432 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:22:04,432 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:22:04,433 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 26 [2020-10-14 18:22:04,433 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-14 18:22:04,433 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 50 [2020-10-14 18:22:04,433 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:22:04,455 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 18:22:04,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:22:04,457 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:22:04,460 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:22:04,460 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 18:22:04,460 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:22:04,460 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-14 18:22:04,460 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:22:04,461 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:22:04,461 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:22:04,461 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:22:04,461 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:22:04,461 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:22:04,473 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-14 18:22:04,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:22:04,499 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:22:05,107 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:22:05,108 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 55 [2020-10-14 18:22:05,108 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:22:05,108 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 618 [2020-10-14 18:22:05,108 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:22:05,108 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:22:05,108 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 26 [2020-10-14 18:22:05,108 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-14 18:22:05,108 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 52 [2020-10-14 18:22:05,109 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:22:05,681 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 18:22:05,681 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [269501367] [2020-10-14 18:22:05,681 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 18:22:05,681 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29] total 29 [2020-10-14 18:22:05,682 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [39307054] [2020-10-14 18:22:05,682 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-10-14 18:22:05,682 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 18:22:05,683 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-10-14 18:22:05,683 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=331, Invalid=481, Unknown=0, NotChecked=0, Total=812 [2020-10-14 18:22:05,683 INFO L87 Difference]: Start difference. First operand 73 states and 77 transitions. Second operand 29 states. [2020-10-14 18:22:06,087 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 18:22:06,087 INFO L93 Difference]: Finished difference Result 94 states and 102 transitions. [2020-10-14 18:22:06,087 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-14 18:22:06,087 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 66 [2020-10-14 18:22:06,088 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 18:22:06,088 INFO L225 Difference]: With dead ends: 94 [2020-10-14 18:22:06,088 INFO L226 Difference]: Without dead ends: 76 [2020-10-14 18:22:06,089 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=368, Invalid=624, Unknown=0, NotChecked=0, Total=992 [2020-10-14 18:22:06,090 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2020-10-14 18:22:06,094 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 75. [2020-10-14 18:22:06,094 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2020-10-14 18:22:06,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 79 transitions. [2020-10-14 18:22:06,095 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 79 transitions. Word has length 66 [2020-10-14 18:22:06,095 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 18:22:06,096 INFO L479 AbstractCegarLoop]: Abstraction has 75 states and 79 transitions. [2020-10-14 18:22:06,096 INFO L480 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-10-14 18:22:06,096 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 79 transitions. [2020-10-14 18:22:06,097 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2020-10-14 18:22:06,097 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 18:22:06,097 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, 1] [2020-10-14 18:22:06,097 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-10-14 18:22:06,097 INFO L427 AbstractCegarLoop]: === Iteration 25 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 18:22:06,098 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 18:22:06,098 INFO L82 PathProgramCache]: Analyzing trace with hash 1413803638, now seen corresponding path program 24 times [2020-10-14 18:22:06,098 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 18:22:06,098 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [758477419] [2020-10-14 18:22:06,098 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 18:22:06,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:22:06,136 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:22:06,166 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:22:08,215 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:22:08,215 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 78 [2020-10-14 18:22:08,215 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 18:22:08,215 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2094 [2020-10-14 18:22:08,215 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:22:08,215 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:22:08,215 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 27 [2020-10-14 18:22:08,216 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-14 18:22:08,216 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 52 [2020-10-14 18:22:08,216 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:22:08,237 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 18:22:08,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:22:08,239 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:22:08,240 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:22:08,240 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 18:22:08,240 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:22:08,241 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 18:22:08,241 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:22:08,241 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:22:08,241 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:22:08,241 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:22:08,241 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:22:08,241 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:22:08,257 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-14 18:22:08,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:22:08,282 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:22:08,995 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:22:08,995 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 57 [2020-10-14 18:22:08,995 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:22:08,995 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 722 [2020-10-14 18:22:08,995 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:22:08,995 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:22:08,995 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 27 [2020-10-14 18:22:08,996 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-14 18:22:08,996 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 54 [2020-10-14 18:22:08,996 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:22:09,598 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 18:22:09,598 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [758477419] [2020-10-14 18:22:09,599 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 18:22:09,599 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30] total 30 [2020-10-14 18:22:09,599 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [466174248] [2020-10-14 18:22:09,600 INFO L459 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-10-14 18:22:09,600 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 18:22:09,600 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-10-14 18:22:09,600 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=357, Invalid=513, Unknown=0, NotChecked=0, Total=870 [2020-10-14 18:22:09,601 INFO L87 Difference]: Start difference. First operand 75 states and 79 transitions. Second operand 30 states. [2020-10-14 18:22:10,011 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 18:22:10,011 INFO L93 Difference]: Finished difference Result 96 states and 104 transitions. [2020-10-14 18:22:10,014 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-10-14 18:22:10,014 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 68 [2020-10-14 18:22:10,015 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 18:22:10,015 INFO L225 Difference]: With dead ends: 96 [2020-10-14 18:22:10,015 INFO L226 Difference]: Without dead ends: 78 [2020-10-14 18:22:10,016 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=395, Invalid=661, Unknown=0, NotChecked=0, Total=1056 [2020-10-14 18:22:10,016 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2020-10-14 18:22:10,021 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 77. [2020-10-14 18:22:10,021 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2020-10-14 18:22:10,021 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 81 transitions. [2020-10-14 18:22:10,022 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 81 transitions. Word has length 68 [2020-10-14 18:22:10,022 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 18:22:10,022 INFO L479 AbstractCegarLoop]: Abstraction has 77 states and 81 transitions. [2020-10-14 18:22:10,022 INFO L480 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-10-14 18:22:10,022 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 81 transitions. [2020-10-14 18:22:10,023 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2020-10-14 18:22:10,023 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 18:22:10,023 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, 1] [2020-10-14 18:22:10,023 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-10-14 18:22:10,024 INFO L427 AbstractCegarLoop]: === Iteration 26 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 18:22:10,024 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 18:22:10,024 INFO L82 PathProgramCache]: Analyzing trace with hash 347687800, now seen corresponding path program 25 times [2020-10-14 18:22:10,024 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 18:22:10,024 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1128870176] [2020-10-14 18:22:10,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 18:22:10,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:22:10,053 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:22:10,094 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:22:11,802 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:22:11,803 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 80 [2020-10-14 18:22:11,803 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 18:22:11,803 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1760 [2020-10-14 18:22:11,803 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:22:11,803 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:22:11,803 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 28 [2020-10-14 18:22:11,804 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-14 18:22:11,804 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 54 [2020-10-14 18:22:11,804 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:22:11,826 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 18:22:11,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:22:11,828 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:22:11,829 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:22:11,830 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 18:22:11,830 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:22:11,830 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 18:22:11,830 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:22:11,830 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:22:11,831 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:22:11,831 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:22:11,831 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:22:11,831 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:22:11,842 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-14 18:22:11,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:22:11,871 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:22:12,689 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:22:12,689 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 59 [2020-10-14 18:22:12,689 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:22:12,689 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 829 [2020-10-14 18:22:12,689 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:22:12,690 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:22:12,690 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 28 [2020-10-14 18:22:12,690 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-14 18:22:12,690 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 56 [2020-10-14 18:22:12,690 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:22:13,296 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 18:22:13,297 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1128870176] [2020-10-14 18:22:13,297 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 18:22:13,297 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31] total 31 [2020-10-14 18:22:13,297 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [129734151] [2020-10-14 18:22:13,299 INFO L459 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-10-14 18:22:13,299 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 18:22:13,300 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-10-14 18:22:13,301 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=384, Invalid=546, Unknown=0, NotChecked=0, Total=930 [2020-10-14 18:22:13,301 INFO L87 Difference]: Start difference. First operand 77 states and 81 transitions. Second operand 31 states. [2020-10-14 18:22:13,610 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 18:22:13,611 INFO L93 Difference]: Finished difference Result 98 states and 106 transitions. [2020-10-14 18:22:13,611 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-14 18:22:13,611 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 70 [2020-10-14 18:22:13,612 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 18:22:13,612 INFO L225 Difference]: With dead ends: 98 [2020-10-14 18:22:13,613 INFO L226 Difference]: Without dead ends: 80 [2020-10-14 18:22:13,614 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=423, Invalid=699, Unknown=0, NotChecked=0, Total=1122 [2020-10-14 18:22:13,614 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2020-10-14 18:22:13,622 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 79. [2020-10-14 18:22:13,622 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2020-10-14 18:22:13,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 83 transitions. [2020-10-14 18:22:13,623 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 83 transitions. Word has length 70 [2020-10-14 18:22:13,625 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 18:22:13,626 INFO L479 AbstractCegarLoop]: Abstraction has 79 states and 83 transitions. [2020-10-14 18:22:13,626 INFO L480 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-10-14 18:22:13,626 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 83 transitions. [2020-10-14 18:22:13,627 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2020-10-14 18:22:13,627 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 18:22:13,627 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, 1] [2020-10-14 18:22:13,627 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-10-14 18:22:13,627 INFO L427 AbstractCegarLoop]: === Iteration 27 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 18:22:13,628 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 18:22:13,628 INFO L82 PathProgramCache]: Analyzing trace with hash -1987416070, now seen corresponding path program 26 times [2020-10-14 18:22:13,628 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 18:22:13,628 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [381463340] [2020-10-14 18:22:13,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 18:22:13,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:22:13,679 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:22:13,712 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:22:16,138 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:22:16,138 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 82 [2020-10-14 18:22:16,138 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 18:22:16,138 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2477 [2020-10-14 18:22:16,138 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:22:16,138 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:22:16,139 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 29 [2020-10-14 18:22:16,139 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-14 18:22:16,139 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 56 [2020-10-14 18:22:16,139 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:22:16,161 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 18:22:16,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:22:16,163 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:22:16,164 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:22:16,164 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 18:22:16,164 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:22:16,164 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 18:22:16,165 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:22:16,165 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:22:16,165 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:22:16,165 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:22:16,165 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:22:16,166 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 18:22:16,179 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-14 18:22:16,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:22:16,210 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:22:17,024 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:22:17,025 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 61 [2020-10-14 18:22:17,025 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:22:17,025 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 827 [2020-10-14 18:22:17,025 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:22:17,025 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:22:17,025 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 29 [2020-10-14 18:22:17,025 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-14 18:22:17,025 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 58 [2020-10-14 18:22:17,026 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:22:17,741 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 18:22:17,741 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [381463340] [2020-10-14 18:22:17,741 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 18:22:17,741 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32] total 32 [2020-10-14 18:22:17,742 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1809796093] [2020-10-14 18:22:17,742 INFO L459 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-10-14 18:22:17,742 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 18:22:17,743 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-10-14 18:22:17,743 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=412, Invalid=580, Unknown=0, NotChecked=0, Total=992 [2020-10-14 18:22:17,743 INFO L87 Difference]: Start difference. First operand 79 states and 83 transitions. Second operand 32 states. [2020-10-14 18:22:18,158 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 18:22:18,158 INFO L93 Difference]: Finished difference Result 100 states and 108 transitions. [2020-10-14 18:22:18,158 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-10-14 18:22:18,159 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 72 [2020-10-14 18:22:18,159 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 18:22:18,160 INFO L225 Difference]: With dead ends: 100 [2020-10-14 18:22:18,160 INFO L226 Difference]: Without dead ends: 82 [2020-10-14 18:22:18,161 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=452, Invalid=738, Unknown=0, NotChecked=0, Total=1190 [2020-10-14 18:22:18,161 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2020-10-14 18:22:18,165 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 81. [2020-10-14 18:22:18,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-10-14 18:22:18,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 85 transitions. [2020-10-14 18:22:18,166 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 85 transitions. Word has length 72 [2020-10-14 18:22:18,166 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 18:22:18,166 INFO L479 AbstractCegarLoop]: Abstraction has 81 states and 85 transitions. [2020-10-14 18:22:18,167 INFO L480 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-10-14 18:22:18,167 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 85 transitions. [2020-10-14 18:22:18,167 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2020-10-14 18:22:18,167 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 18:22:18,168 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, 1] [2020-10-14 18:22:18,168 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-10-14 18:22:18,168 INFO L427 AbstractCegarLoop]: === Iteration 28 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 18:22:18,168 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 18:22:18,168 INFO L82 PathProgramCache]: Analyzing trace with hash 245660668, now seen corresponding path program 27 times [2020-10-14 18:22:18,169 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 18:22:18,169 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1857459852] [2020-10-14 18:22:18,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 18:22:18,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:22:18,216 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:22:18,242 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:22:20,708 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:22:20,708 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 84 [2020-10-14 18:22:20,708 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 18:22:20,708 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2510 [2020-10-14 18:22:20,709 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:22:20,709 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:22:20,709 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 30 [2020-10-14 18:22:20,709 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-14 18:22:20,709 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 58 [2020-10-14 18:22:20,709 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:22:20,730 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 18:22:20,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:22:20,732 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:22:20,735 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:22:20,735 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 18:22:20,735 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:22:20,735 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-14 18:22:20,735 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:22:20,736 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:22:20,736 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:22:20,736 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:22:20,736 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:22:20,736 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:22:20,747 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-14 18:22:20,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:22:20,775 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:22:21,657 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:22:21,658 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 63 [2020-10-14 18:22:21,658 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:22:21,658 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 894 [2020-10-14 18:22:21,658 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:22:21,658 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:22:21,658 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 30 [2020-10-14 18:22:21,658 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-14 18:22:21,658 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 60 [2020-10-14 18:22:21,659 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:22:23,350 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 18:22:23,351 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1857459852] [2020-10-14 18:22:23,351 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 18:22:23,351 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33] total 33 [2020-10-14 18:22:23,351 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1491762016] [2020-10-14 18:22:23,352 INFO L459 AbstractCegarLoop]: Interpolant automaton has 33 states [2020-10-14 18:22:23,352 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 18:22:23,352 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2020-10-14 18:22:23,353 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=441, Invalid=615, Unknown=0, NotChecked=0, Total=1056 [2020-10-14 18:22:23,353 INFO L87 Difference]: Start difference. First operand 81 states and 85 transitions. Second operand 33 states. [2020-10-14 18:22:23,792 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 18:22:23,792 INFO L93 Difference]: Finished difference Result 102 states and 110 transitions. [2020-10-14 18:22:23,792 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-10-14 18:22:23,793 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 74 [2020-10-14 18:22:23,793 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 18:22:23,794 INFO L225 Difference]: With dead ends: 102 [2020-10-14 18:22:23,794 INFO L226 Difference]: Without dead ends: 84 [2020-10-14 18:22:23,795 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=509, Invalid=751, Unknown=0, NotChecked=0, Total=1260 [2020-10-14 18:22:23,796 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2020-10-14 18:22:23,801 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 83. [2020-10-14 18:22:23,801 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2020-10-14 18:22:23,801 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 87 transitions. [2020-10-14 18:22:23,802 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 87 transitions. Word has length 74 [2020-10-14 18:22:23,802 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 18:22:23,802 INFO L479 AbstractCegarLoop]: Abstraction has 83 states and 87 transitions. [2020-10-14 18:22:23,802 INFO L480 AbstractCegarLoop]: Interpolant automaton has 33 states. [2020-10-14 18:22:23,802 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 87 transitions. [2020-10-14 18:22:23,803 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2020-10-14 18:22:23,803 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 18:22:23,803 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, 1] [2020-10-14 18:22:23,804 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2020-10-14 18:22:23,804 INFO L427 AbstractCegarLoop]: === Iteration 29 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 18:22:23,804 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 18:22:23,804 INFO L82 PathProgramCache]: Analyzing trace with hash -1251242114, now seen corresponding path program 28 times [2020-10-14 18:22:23,804 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 18:22:23,805 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [920369721] [2020-10-14 18:22:23,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 18:22:23,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:22:23,848 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:22:23,880 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:22:26,776 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:22:26,777 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 86 [2020-10-14 18:22:26,777 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 18:22:26,777 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2947 [2020-10-14 18:22:26,777 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:22:26,778 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:22:26,778 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 31 [2020-10-14 18:22:26,778 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-14 18:22:26,778 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 60 [2020-10-14 18:22:26,778 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:22:26,799 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 18:22:26,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:22:26,803 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:22:26,804 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:22:26,804 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 18:22:26,804 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:22:26,804 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 18:22:26,804 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:22:26,804 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:22:26,805 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:22:26,805 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:22:26,805 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:22:26,805 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:22:26,815 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-14 18:22:26,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:22:26,856 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:22:27,910 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:22:27,911 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 65 [2020-10-14 18:22:27,911 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:22:27,911 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1072 [2020-10-14 18:22:27,911 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:22:27,911 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:22:27,911 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 31 [2020-10-14 18:22:27,911 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-14 18:22:27,911 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 62 [2020-10-14 18:22:27,912 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:22:28,712 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 18:22:28,713 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [920369721] [2020-10-14 18:22:28,713 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 18:22:28,713 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34] total 34 [2020-10-14 18:22:28,713 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [94606771] [2020-10-14 18:22:28,713 INFO L459 AbstractCegarLoop]: Interpolant automaton has 34 states [2020-10-14 18:22:28,714 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 18:22:28,714 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2020-10-14 18:22:28,714 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=471, Invalid=651, Unknown=0, NotChecked=0, Total=1122 [2020-10-14 18:22:28,714 INFO L87 Difference]: Start difference. First operand 83 states and 87 transitions. Second operand 34 states. [2020-10-14 18:22:29,040 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 18:22:29,041 INFO L93 Difference]: Finished difference Result 104 states and 112 transitions. [2020-10-14 18:22:29,041 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-10-14 18:22:29,041 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 76 [2020-10-14 18:22:29,042 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 18:22:29,042 INFO L225 Difference]: With dead ends: 104 [2020-10-14 18:22:29,043 INFO L226 Difference]: Without dead ends: 86 [2020-10-14 18:22:29,044 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=513, Invalid=819, Unknown=0, NotChecked=0, Total=1332 [2020-10-14 18:22:29,045 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2020-10-14 18:22:29,049 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 85. [2020-10-14 18:22:29,049 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2020-10-14 18:22:29,050 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 89 transitions. [2020-10-14 18:22:29,050 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 89 transitions. Word has length 76 [2020-10-14 18:22:29,050 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 18:22:29,050 INFO L479 AbstractCegarLoop]: Abstraction has 85 states and 89 transitions. [2020-10-14 18:22:29,050 INFO L480 AbstractCegarLoop]: Interpolant automaton has 34 states. [2020-10-14 18:22:29,051 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 89 transitions. [2020-10-14 18:22:29,051 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2020-10-14 18:22:29,051 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 18:22:29,051 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, 1] [2020-10-14 18:22:29,052 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2020-10-14 18:22:29,052 INFO L427 AbstractCegarLoop]: === Iteration 30 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 18:22:29,052 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 18:22:29,052 INFO L82 PathProgramCache]: Analyzing trace with hash -960771456, now seen corresponding path program 29 times [2020-10-14 18:22:29,052 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 18:22:29,053 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [199606733] [2020-10-14 18:22:29,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 18:22:29,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:22:29,086 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:22:29,111 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:22:32,175 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:22:32,175 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 88 [2020-10-14 18:22:32,176 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 18:22:32,176 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3103 [2020-10-14 18:22:32,176 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:22:32,176 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:22:32,176 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 32 [2020-10-14 18:22:32,176 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-14 18:22:32,176 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 62 [2020-10-14 18:22:32,176 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:22:32,199 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 18:22:32,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:22:32,201 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:22:32,202 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:22:32,203 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 18:22:32,203 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:22:32,203 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 18:22:32,203 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:22:32,203 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:22:32,203 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:22:32,204 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:22:32,204 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:22:32,204 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:22:32,215 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-14 18:22:32,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:22:32,245 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:22:33,285 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:22:33,285 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 67 [2020-10-14 18:22:33,285 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:22:33,285 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1053 [2020-10-14 18:22:33,285 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:22:33,285 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:22:33,286 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 32 [2020-10-14 18:22:33,286 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-14 18:22:33,286 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 64 [2020-10-14 18:22:33,286 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:22:35,100 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 18:22:35,101 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [199606733] [2020-10-14 18:22:35,101 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 18:22:35,101 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35] total 35 [2020-10-14 18:22:35,102 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1436415755] [2020-10-14 18:22:35,102 INFO L459 AbstractCegarLoop]: Interpolant automaton has 35 states [2020-10-14 18:22:35,102 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 18:22:35,102 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2020-10-14 18:22:35,103 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=502, Invalid=688, Unknown=0, NotChecked=0, Total=1190 [2020-10-14 18:22:35,103 INFO L87 Difference]: Start difference. First operand 85 states and 89 transitions. Second operand 35 states. [2020-10-14 18:22:35,446 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 18:22:35,447 INFO L93 Difference]: Finished difference Result 106 states and 114 transitions. [2020-10-14 18:22:35,447 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-10-14 18:22:35,447 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 78 [2020-10-14 18:22:35,447 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 18:22:35,448 INFO L225 Difference]: With dead ends: 106 [2020-10-14 18:22:35,448 INFO L226 Difference]: Without dead ends: 88 [2020-10-14 18:22:35,449 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=574, Invalid=832, Unknown=0, NotChecked=0, Total=1406 [2020-10-14 18:22:35,450 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2020-10-14 18:22:35,455 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 87. [2020-10-14 18:22:35,455 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2020-10-14 18:22:35,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 91 transitions. [2020-10-14 18:22:35,456 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 91 transitions. Word has length 78 [2020-10-14 18:22:35,456 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 18:22:35,456 INFO L479 AbstractCegarLoop]: Abstraction has 87 states and 91 transitions. [2020-10-14 18:22:35,456 INFO L480 AbstractCegarLoop]: Interpolant automaton has 35 states. [2020-10-14 18:22:35,456 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 91 transitions. [2020-10-14 18:22:35,457 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2020-10-14 18:22:35,457 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 18:22:35,457 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, 1] [2020-10-14 18:22:35,459 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2020-10-14 18:22:35,459 INFO L427 AbstractCegarLoop]: === Iteration 31 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 18:22:35,459 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 18:22:35,459 INFO L82 PathProgramCache]: Analyzing trace with hash -991343358, now seen corresponding path program 30 times [2020-10-14 18:22:35,460 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 18:22:35,460 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1206716781] [2020-10-14 18:22:35,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 18:22:35,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:22:35,509 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:22:35,539 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:22:38,682 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:22:38,683 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 90 [2020-10-14 18:22:38,683 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 18:22:38,683 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3195 [2020-10-14 18:22:38,683 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:22:38,683 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:22:38,683 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 33 [2020-10-14 18:22:38,683 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-14 18:22:38,684 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 64 [2020-10-14 18:22:38,684 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:22:38,708 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 18:22:38,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:22:38,710 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:22:38,711 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:22:38,711 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 18:22:38,711 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:22:38,712 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 18:22:38,712 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:22:38,712 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:22:38,712 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:22:38,712 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:22:38,712 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:22:38,712 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:22:38,723 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-14 18:22:38,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:22:38,767 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:22:39,978 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:22:39,978 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 69 [2020-10-14 18:22:39,978 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:22:39,978 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1232 [2020-10-14 18:22:39,978 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:22:39,979 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:22:39,979 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 33 [2020-10-14 18:22:39,979 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-14 18:22:39,979 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 66 [2020-10-14 18:22:39,979 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:22:40,866 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 18:22:40,867 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1206716781] [2020-10-14 18:22:40,867 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 18:22:40,867 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36] total 36 [2020-10-14 18:22:40,867 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1920181917] [2020-10-14 18:22:40,867 INFO L459 AbstractCegarLoop]: Interpolant automaton has 36 states [2020-10-14 18:22:40,868 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 18:22:40,868 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2020-10-14 18:22:40,869 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=534, Invalid=726, Unknown=0, NotChecked=0, Total=1260 [2020-10-14 18:22:40,869 INFO L87 Difference]: Start difference. First operand 87 states and 91 transitions. Second operand 36 states. [2020-10-14 18:22:41,223 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 18:22:41,224 INFO L93 Difference]: Finished difference Result 108 states and 116 transitions. [2020-10-14 18:22:41,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-10-14 18:22:41,224 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 80 [2020-10-14 18:22:41,224 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 18:22:41,225 INFO L225 Difference]: With dead ends: 108 [2020-10-14 18:22:41,225 INFO L226 Difference]: Without dead ends: 90 [2020-10-14 18:22:41,226 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=578, Invalid=904, Unknown=0, NotChecked=0, Total=1482 [2020-10-14 18:22:41,227 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2020-10-14 18:22:41,235 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 89. [2020-10-14 18:22:41,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2020-10-14 18:22:41,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 93 transitions. [2020-10-14 18:22:41,236 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 93 transitions. Word has length 80 [2020-10-14 18:22:41,236 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 18:22:41,236 INFO L479 AbstractCegarLoop]: Abstraction has 89 states and 93 transitions. [2020-10-14 18:22:41,237 INFO L480 AbstractCegarLoop]: Interpolant automaton has 36 states. [2020-10-14 18:22:41,237 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 93 transitions. [2020-10-14 18:22:41,242 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2020-10-14 18:22:41,242 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 18:22:41,242 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, 1] [2020-10-14 18:22:41,242 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2020-10-14 18:22:41,242 INFO L427 AbstractCegarLoop]: === Iteration 32 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 18:22:41,243 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 18:22:41,243 INFO L82 PathProgramCache]: Analyzing trace with hash -306170108, now seen corresponding path program 31 times [2020-10-14 18:22:41,243 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 18:22:41,243 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [460183262] [2020-10-14 18:22:41,243 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 18:22:41,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:22:41,279 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:22:41,306 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:22:45,965 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:22:45,966 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 92 [2020-10-14 18:22:45,966 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 18:22:45,966 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4700 [2020-10-14 18:22:45,966 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:22:45,966 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:22:45,966 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 34 [2020-10-14 18:22:45,966 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-14 18:22:45,967 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 66 [2020-10-14 18:22:45,967 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:22:45,998 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 18:22:45,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:22:46,000 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:22:46,001 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:22:46,001 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 18:22:46,001 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:22:46,001 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 18:22:46,001 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:22:46,002 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:22:46,002 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:22:46,002 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:22:46,002 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:22:46,002 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:22:46,013 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-14 18:22:46,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:22:46,045 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:22:47,282 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:22:47,282 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 71 [2020-10-14 18:22:47,282 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:22:47,282 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1251 [2020-10-14 18:22:47,282 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:22:47,282 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:22:47,282 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 34 [2020-10-14 18:22:47,283 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-14 18:22:47,283 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 68 [2020-10-14 18:22:47,283 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:22:48,209 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 18:22:48,209 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [460183262] [2020-10-14 18:22:48,210 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 18:22:48,210 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37] total 37 [2020-10-14 18:22:48,210 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [782421804] [2020-10-14 18:22:48,210 INFO L459 AbstractCegarLoop]: Interpolant automaton has 37 states [2020-10-14 18:22:48,211 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 18:22:48,211 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2020-10-14 18:22:48,211 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=567, Invalid=765, Unknown=0, NotChecked=0, Total=1332 [2020-10-14 18:22:48,212 INFO L87 Difference]: Start difference. First operand 89 states and 93 transitions. Second operand 37 states. [2020-10-14 18:22:48,648 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 18:22:48,649 INFO L93 Difference]: Finished difference Result 110 states and 118 transitions. [2020-10-14 18:22:48,649 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-10-14 18:22:48,649 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 82 [2020-10-14 18:22:48,650 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 18:22:48,651 INFO L225 Difference]: With dead ends: 110 [2020-10-14 18:22:48,651 INFO L226 Difference]: Without dead ends: 92 [2020-10-14 18:22:48,652 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=612, Invalid=948, Unknown=0, NotChecked=0, Total=1560 [2020-10-14 18:22:48,653 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2020-10-14 18:22:48,656 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 91. [2020-10-14 18:22:48,656 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2020-10-14 18:22:48,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 95 transitions. [2020-10-14 18:22:48,657 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 95 transitions. Word has length 82 [2020-10-14 18:22:48,658 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 18:22:48,658 INFO L479 AbstractCegarLoop]: Abstraction has 91 states and 95 transitions. [2020-10-14 18:22:48,658 INFO L480 AbstractCegarLoop]: Interpolant automaton has 37 states. [2020-10-14 18:22:48,658 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 95 transitions. [2020-10-14 18:22:48,658 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2020-10-14 18:22:48,659 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 18:22:48,659 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, 1] [2020-10-14 18:22:48,659 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2020-10-14 18:22:48,659 INFO L427 AbstractCegarLoop]: === Iteration 33 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 18:22:48,659 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 18:22:48,660 INFO L82 PathProgramCache]: Analyzing trace with hash 1015326854, now seen corresponding path program 32 times [2020-10-14 18:22:48,660 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 18:22:48,660 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1010954834] [2020-10-14 18:22:48,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 18:22:48,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:22:48,707 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:22:48,737 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:22:52,661 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:22:52,661 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 94 [2020-10-14 18:22:52,661 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 18:22:52,661 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3974 [2020-10-14 18:22:52,661 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:22:52,661 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:22:52,662 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 35 [2020-10-14 18:22:52,662 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-14 18:22:52,662 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 68 [2020-10-14 18:22:52,662 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:22:52,688 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 18:22:52,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:22:52,690 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:22:52,692 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:22:52,692 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 18:22:52,692 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:22:52,692 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 18:22:52,692 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:22:52,692 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:22:52,692 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:22:52,692 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:22:52,693 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:22:52,693 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:22:52,704 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-14 18:22:52,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:22:52,741 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:22:54,060 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:22:54,061 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 73 [2020-10-14 18:22:54,061 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:22:54,061 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1335 [2020-10-14 18:22:54,061 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:22:54,061 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:22:54,061 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 35 [2020-10-14 18:22:54,062 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-14 18:22:54,062 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 70 [2020-10-14 18:22:54,062 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:22:55,054 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 18:22:55,055 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1010954834] [2020-10-14 18:22:55,055 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 18:22:55,055 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38] total 38 [2020-10-14 18:22:55,055 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [948259230] [2020-10-14 18:22:55,055 INFO L459 AbstractCegarLoop]: Interpolant automaton has 38 states [2020-10-14 18:22:55,056 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 18:22:55,056 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2020-10-14 18:22:55,057 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=601, Invalid=805, Unknown=0, NotChecked=0, Total=1406 [2020-10-14 18:22:55,057 INFO L87 Difference]: Start difference. First operand 91 states and 95 transitions. Second operand 38 states. [2020-10-14 18:22:55,578 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 18:22:55,578 INFO L93 Difference]: Finished difference Result 112 states and 120 transitions. [2020-10-14 18:22:55,579 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-10-14 18:22:55,579 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 84 [2020-10-14 18:22:55,579 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 18:22:55,580 INFO L225 Difference]: With dead ends: 112 [2020-10-14 18:22:55,580 INFO L226 Difference]: Without dead ends: 94 [2020-10-14 18:22:55,582 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=647, Invalid=993, Unknown=0, NotChecked=0, Total=1640 [2020-10-14 18:22:55,582 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2020-10-14 18:22:55,587 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 93. [2020-10-14 18:22:55,587 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2020-10-14 18:22:55,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 97 transitions. [2020-10-14 18:22:55,588 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 97 transitions. Word has length 84 [2020-10-14 18:22:55,588 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 18:22:55,588 INFO L479 AbstractCegarLoop]: Abstraction has 93 states and 97 transitions. [2020-10-14 18:22:55,588 INFO L480 AbstractCegarLoop]: Interpolant automaton has 38 states. [2020-10-14 18:22:55,588 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 97 transitions. [2020-10-14 18:22:55,589 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2020-10-14 18:22:55,589 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 18:22:55,589 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, 1] [2020-10-14 18:22:55,589 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2020-10-14 18:22:55,590 INFO L427 AbstractCegarLoop]: === Iteration 34 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 18:22:55,590 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 18:22:55,590 INFO L82 PathProgramCache]: Analyzing trace with hash -336412280, now seen corresponding path program 33 times [2020-10-14 18:22:55,590 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 18:22:55,590 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [239231426] [2020-10-14 18:22:55,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 18:22:55,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:22:55,640 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:22:55,687 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:22:59,704 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:22:59,704 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 96 [2020-10-14 18:22:59,704 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 18:22:59,704 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4085 [2020-10-14 18:22:59,704 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:22:59,705 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:22:59,705 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 36 [2020-10-14 18:22:59,705 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-14 18:22:59,705 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 70 [2020-10-14 18:22:59,705 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:22:59,746 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 18:22:59,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:22:59,748 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:22:59,749 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:22:59,749 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 18:22:59,749 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:22:59,750 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 18:22:59,750 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:22:59,750 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:22:59,750 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:22:59,750 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:22:59,751 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:22:59,751 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 18:22:59,765 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-14 18:22:59,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:22:59,832 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:23:01,470 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:23:01,470 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 75 [2020-10-14 18:23:01,471 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:23:01,471 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1667 [2020-10-14 18:23:01,471 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:23:01,471 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:23:01,471 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 36 [2020-10-14 18:23:01,471 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-14 18:23:01,471 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 72 [2020-10-14 18:23:01,471 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:23:02,564 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 18:23:02,564 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [239231426] [2020-10-14 18:23:02,564 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 18:23:02,565 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39] total 39 [2020-10-14 18:23:02,565 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1162165938] [2020-10-14 18:23:02,565 INFO L459 AbstractCegarLoop]: Interpolant automaton has 39 states [2020-10-14 18:23:02,565 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 18:23:02,566 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2020-10-14 18:23:02,567 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=636, Invalid=846, Unknown=0, NotChecked=0, Total=1482 [2020-10-14 18:23:02,567 INFO L87 Difference]: Start difference. First operand 93 states and 97 transitions. Second operand 39 states. [2020-10-14 18:23:02,976 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 18:23:02,976 INFO L93 Difference]: Finished difference Result 114 states and 122 transitions. [2020-10-14 18:23:02,976 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-10-14 18:23:02,977 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 86 [2020-10-14 18:23:02,977 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 18:23:02,978 INFO L225 Difference]: With dead ends: 114 [2020-10-14 18:23:02,978 INFO L226 Difference]: Without dead ends: 96 [2020-10-14 18:23:02,980 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=683, Invalid=1039, Unknown=0, NotChecked=0, Total=1722 [2020-10-14 18:23:02,981 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2020-10-14 18:23:02,987 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 95. [2020-10-14 18:23:02,987 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 95 states. [2020-10-14 18:23:02,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 99 transitions. [2020-10-14 18:23:02,988 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 99 transitions. Word has length 86 [2020-10-14 18:23:02,988 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 18:23:02,988 INFO L479 AbstractCegarLoop]: Abstraction has 95 states and 99 transitions. [2020-10-14 18:23:02,988 INFO L480 AbstractCegarLoop]: Interpolant automaton has 39 states. [2020-10-14 18:23:02,989 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 99 transitions. [2020-10-14 18:23:02,989 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2020-10-14 18:23:02,989 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 18:23:02,989 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, 1] [2020-10-14 18:23:02,990 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2020-10-14 18:23:02,990 INFO L427 AbstractCegarLoop]: === Iteration 35 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 18:23:02,990 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 18:23:02,990 INFO L82 PathProgramCache]: Analyzing trace with hash 2017370634, now seen corresponding path program 34 times [2020-10-14 18:23:02,990 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 18:23:02,990 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [305249844] [2020-10-14 18:23:02,991 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 18:23:03,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:23:03,042 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:23:03,073 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:23:07,260 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:23:07,260 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 98 [2020-10-14 18:23:07,260 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 18:23:07,260 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4241 [2020-10-14 18:23:07,260 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:23:07,260 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:23:07,261 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 37 [2020-10-14 18:23:07,261 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-14 18:23:07,261 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 72 [2020-10-14 18:23:07,261 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:23:07,298 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 18:23:07,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:23:07,299 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:23:07,300 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:23:07,301 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 18:23:07,301 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:23:07,301 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 18:23:07,301 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:23:07,301 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:23:07,302 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:23:07,302 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:23:07,302 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:23:07,302 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:23:07,317 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-14 18:23:07,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:23:07,361 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:23:08,989 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:23:08,989 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 77 [2020-10-14 18:23:08,989 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:23:08,989 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1644 [2020-10-14 18:23:08,990 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:23:08,990 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:23:08,990 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 37 [2020-10-14 18:23:08,990 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-14 18:23:08,990 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 74 [2020-10-14 18:23:08,990 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:23:10,133 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 18:23:10,134 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [305249844] [2020-10-14 18:23:10,134 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 18:23:10,134 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40] total 40 [2020-10-14 18:23:10,134 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1961068660] [2020-10-14 18:23:10,135 INFO L459 AbstractCegarLoop]: Interpolant automaton has 40 states [2020-10-14 18:23:10,135 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 18:23:10,135 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2020-10-14 18:23:10,136 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=672, Invalid=888, Unknown=0, NotChecked=0, Total=1560 [2020-10-14 18:23:10,136 INFO L87 Difference]: Start difference. First operand 95 states and 99 transitions. Second operand 40 states. [2020-10-14 18:23:10,698 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 18:23:10,698 INFO L93 Difference]: Finished difference Result 116 states and 124 transitions. [2020-10-14 18:23:10,699 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-10-14 18:23:10,699 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 88 [2020-10-14 18:23:10,699 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 18:23:10,700 INFO L225 Difference]: With dead ends: 116 [2020-10-14 18:23:10,700 INFO L226 Difference]: Without dead ends: 98 [2020-10-14 18:23:10,701 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=720, Invalid=1086, Unknown=0, NotChecked=0, Total=1806 [2020-10-14 18:23:10,701 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2020-10-14 18:23:10,707 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 97. [2020-10-14 18:23:10,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2020-10-14 18:23:10,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 101 transitions. [2020-10-14 18:23:10,708 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 101 transitions. Word has length 88 [2020-10-14 18:23:10,708 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 18:23:10,708 INFO L479 AbstractCegarLoop]: Abstraction has 97 states and 101 transitions. [2020-10-14 18:23:10,709 INFO L480 AbstractCegarLoop]: Interpolant automaton has 40 states. [2020-10-14 18:23:10,709 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 101 transitions. [2020-10-14 18:23:10,709 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2020-10-14 18:23:10,709 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 18:23:10,710 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, 1] [2020-10-14 18:23:10,710 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2020-10-14 18:23:10,710 INFO L427 AbstractCegarLoop]: === Iteration 36 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 18:23:10,710 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 18:23:10,711 INFO L82 PathProgramCache]: Analyzing trace with hash 554985996, now seen corresponding path program 35 times [2020-10-14 18:23:10,711 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 18:23:10,711 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [987882253] [2020-10-14 18:23:10,711 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 18:23:10,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:23:10,753 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:23:10,784 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:23:15,631 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:23:15,632 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 100 [2020-10-14 18:23:15,632 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 18:23:15,632 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4894 [2020-10-14 18:23:15,632 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:23:15,632 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:23:15,632 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 38 [2020-10-14 18:23:15,632 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-14 18:23:15,633 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 74 [2020-10-14 18:23:15,633 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:23:15,657 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 18:23:15,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:23:15,659 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:23:15,660 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:23:15,660 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 18:23:15,661 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:23:15,661 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 18:23:15,661 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:23:15,661 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:23:15,661 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:23:15,662 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:23:15,662 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:23:15,662 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:23:15,672 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-14 18:23:15,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:23:15,711 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:23:17,365 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:23:17,365 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 79 [2020-10-14 18:23:17,366 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:23:17,366 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1671 [2020-10-14 18:23:17,366 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:23:17,366 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:23:17,366 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 38 [2020-10-14 18:23:17,366 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-14 18:23:17,366 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 76 [2020-10-14 18:23:17,366 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:23:19,908 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 18:23:19,908 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [987882253] [2020-10-14 18:23:19,908 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 18:23:19,908 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41] total 41 [2020-10-14 18:23:19,909 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [206991464] [2020-10-14 18:23:19,909 INFO L459 AbstractCegarLoop]: Interpolant automaton has 41 states [2020-10-14 18:23:19,909 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 18:23:19,909 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2020-10-14 18:23:19,910 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=709, Invalid=931, Unknown=0, NotChecked=0, Total=1640 [2020-10-14 18:23:19,910 INFO L87 Difference]: Start difference. First operand 97 states and 101 transitions. Second operand 41 states. [2020-10-14 18:23:20,536 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 18:23:20,536 INFO L93 Difference]: Finished difference Result 118 states and 126 transitions. [2020-10-14 18:23:20,537 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2020-10-14 18:23:20,537 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 90 [2020-10-14 18:23:20,538 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 18:23:20,539 INFO L225 Difference]: With dead ends: 118 [2020-10-14 18:23:20,540 INFO L226 Difference]: Without dead ends: 100 [2020-10-14 18:23:20,541 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=793, Invalid=1099, Unknown=0, NotChecked=0, Total=1892 [2020-10-14 18:23:20,541 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2020-10-14 18:23:20,546 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 99. [2020-10-14 18:23:20,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2020-10-14 18:23:20,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 103 transitions. [2020-10-14 18:23:20,546 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 103 transitions. Word has length 90 [2020-10-14 18:23:20,547 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 18:23:20,547 INFO L479 AbstractCegarLoop]: Abstraction has 99 states and 103 transitions. [2020-10-14 18:23:20,547 INFO L480 AbstractCegarLoop]: Interpolant automaton has 41 states. [2020-10-14 18:23:20,547 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 103 transitions. [2020-10-14 18:23:20,548 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2020-10-14 18:23:20,548 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 18:23:20,548 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, 1] [2020-10-14 18:23:20,548 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2020-10-14 18:23:20,548 INFO L427 AbstractCegarLoop]: === Iteration 37 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 18:23:20,549 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 18:23:20,549 INFO L82 PathProgramCache]: Analyzing trace with hash -342345330, now seen corresponding path program 36 times [2020-10-14 18:23:20,549 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 18:23:20,549 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [980230794] [2020-10-14 18:23:20,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 18:23:20,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:23:20,588 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:23:20,617 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:23:25,372 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:23:25,372 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 102 [2020-10-14 18:23:25,373 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 18:23:25,373 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4801 [2020-10-14 18:23:25,373 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:23:25,373 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:23:25,373 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 39 [2020-10-14 18:23:25,373 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-14 18:23:25,373 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 76 [2020-10-14 18:23:25,373 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:23:25,398 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 18:23:25,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:23:25,400 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:23:25,401 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:23:25,401 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 18:23:25,402 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:23:25,402 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 18:23:25,402 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:23:25,402 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:23:25,402 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:23:25,402 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:23:25,403 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:23:25,403 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:23:25,415 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-14 18:23:25,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:23:25,461 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:23:27,160 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:23:27,160 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 81 [2020-10-14 18:23:27,160 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:23:27,160 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1716 [2020-10-14 18:23:27,160 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:23:27,160 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:23:27,160 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 39 [2020-10-14 18:23:27,161 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-14 18:23:27,161 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 78 [2020-10-14 18:23:27,161 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:23:28,403 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 18:23:28,403 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [980230794] [2020-10-14 18:23:28,403 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 18:23:28,403 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42] total 42 [2020-10-14 18:23:28,404 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [246839002] [2020-10-14 18:23:28,404 INFO L459 AbstractCegarLoop]: Interpolant automaton has 42 states [2020-10-14 18:23:28,404 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 18:23:28,405 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2020-10-14 18:23:28,405 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=747, Invalid=975, Unknown=0, NotChecked=0, Total=1722 [2020-10-14 18:23:28,405 INFO L87 Difference]: Start difference. First operand 99 states and 103 transitions. Second operand 42 states. [2020-10-14 18:23:28,956 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 18:23:28,956 INFO L93 Difference]: Finished difference Result 120 states and 128 transitions. [2020-10-14 18:23:28,957 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2020-10-14 18:23:28,957 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 92 [2020-10-14 18:23:28,957 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 18:23:28,958 INFO L225 Difference]: With dead ends: 120 [2020-10-14 18:23:28,958 INFO L226 Difference]: Without dead ends: 102 [2020-10-14 18:23:28,960 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=797, Invalid=1183, Unknown=0, NotChecked=0, Total=1980 [2020-10-14 18:23:28,962 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2020-10-14 18:23:28,971 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 101. [2020-10-14 18:23:28,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2020-10-14 18:23:28,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 105 transitions. [2020-10-14 18:23:28,973 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 105 transitions. Word has length 92 [2020-10-14 18:23:28,973 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 18:23:28,973 INFO L479 AbstractCegarLoop]: Abstraction has 101 states and 105 transitions. [2020-10-14 18:23:28,973 INFO L480 AbstractCegarLoop]: Interpolant automaton has 42 states. [2020-10-14 18:23:28,974 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 105 transitions. [2020-10-14 18:23:28,975 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2020-10-14 18:23:28,976 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 18:23:28,976 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, 1] [2020-10-14 18:23:28,976 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2020-10-14 18:23:28,976 INFO L427 AbstractCegarLoop]: === Iteration 38 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 18:23:28,976 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 18:23:28,976 INFO L82 PathProgramCache]: Analyzing trace with hash 610676880, now seen corresponding path program 37 times [2020-10-14 18:23:28,977 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 18:23:28,977 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [693809155] [2020-10-14 18:23:28,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 18:23:29,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:23:29,046 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:23:29,105 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:23:34,043 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:23:34,044 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 104 [2020-10-14 18:23:34,044 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 18:23:34,044 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5026 [2020-10-14 18:23:34,044 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:23:34,044 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:23:34,044 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 40 [2020-10-14 18:23:34,045 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-14 18:23:34,045 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 78 [2020-10-14 18:23:34,045 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:23:34,070 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 18:23:34,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:23:34,071 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:23:34,073 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:23:34,073 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 18:23:34,073 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:23:34,073 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 18:23:34,074 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:23:34,074 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:23:34,074 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:23:34,074 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:23:34,074 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:23:34,074 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:23:34,085 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-14 18:23:34,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:23:34,123 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:23:35,998 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:23:35,998 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 83 [2020-10-14 18:23:35,998 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:23:35,998 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1891 [2020-10-14 18:23:35,999 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:23:35,999 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:23:35,999 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 40 [2020-10-14 18:23:35,999 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-14 18:23:35,999 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 80 [2020-10-14 18:23:35,999 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:23:37,228 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 18:23:37,229 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [693809155] [2020-10-14 18:23:37,229 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 18:23:37,229 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43] total 43 [2020-10-14 18:23:37,229 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [718116160] [2020-10-14 18:23:37,230 INFO L459 AbstractCegarLoop]: Interpolant automaton has 43 states [2020-10-14 18:23:37,230 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 18:23:37,230 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2020-10-14 18:23:37,231 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=786, Invalid=1020, Unknown=0, NotChecked=0, Total=1806 [2020-10-14 18:23:37,231 INFO L87 Difference]: Start difference. First operand 101 states and 105 transitions. Second operand 43 states. [2020-10-14 18:23:37,800 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 18:23:37,801 INFO L93 Difference]: Finished difference Result 122 states and 130 transitions. [2020-10-14 18:23:37,801 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2020-10-14 18:23:37,801 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 94 [2020-10-14 18:23:37,802 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 18:23:37,802 INFO L225 Difference]: With dead ends: 122 [2020-10-14 18:23:37,803 INFO L226 Difference]: Without dead ends: 104 [2020-10-14 18:23:37,803 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=837, Invalid=1233, Unknown=0, NotChecked=0, Total=2070 [2020-10-14 18:23:37,804 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2020-10-14 18:23:37,808 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 103. [2020-10-14 18:23:37,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 103 states. [2020-10-14 18:23:37,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 107 transitions. [2020-10-14 18:23:37,809 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 107 transitions. Word has length 94 [2020-10-14 18:23:37,809 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 18:23:37,809 INFO L479 AbstractCegarLoop]: Abstraction has 103 states and 107 transitions. [2020-10-14 18:23:37,809 INFO L480 AbstractCegarLoop]: Interpolant automaton has 43 states. [2020-10-14 18:23:37,809 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 107 transitions. [2020-10-14 18:23:37,810 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2020-10-14 18:23:37,810 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 18:23:37,810 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, 1] [2020-10-14 18:23:37,810 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2020-10-14 18:23:37,810 INFO L427 AbstractCegarLoop]: === Iteration 39 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 18:23:37,811 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 18:23:37,811 INFO L82 PathProgramCache]: Analyzing trace with hash 1636986642, now seen corresponding path program 38 times [2020-10-14 18:23:37,811 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 18:23:37,811 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1286381362] [2020-10-14 18:23:37,811 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 18:23:37,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:23:37,850 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:23:37,880 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:23:42,903 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:23:42,903 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 106 [2020-10-14 18:23:42,903 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 18:23:42,903 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5069 [2020-10-14 18:23:42,904 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:23:42,904 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:23:42,904 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 41 [2020-10-14 18:23:42,904 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-14 18:23:42,904 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 80 [2020-10-14 18:23:42,904 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:23:42,932 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 18:23:42,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:23:42,934 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:23:42,935 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:23:42,935 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 18:23:42,936 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:23:42,936 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 18:23:42,936 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:23:42,936 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:23:42,936 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:23:42,936 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:23:42,936 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:23:42,937 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:23:42,947 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-14 18:23:42,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:23:42,986 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:23:44,921 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:23:44,922 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 85 [2020-10-14 18:23:44,922 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:23:44,922 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1952 [2020-10-14 18:23:44,922 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:23:44,923 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:23:44,923 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 41 [2020-10-14 18:23:44,923 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-14 18:23:44,923 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 82 [2020-10-14 18:23:44,923 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 18:23:46,261 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 18:23:46,261 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1286381362] [2020-10-14 18:23:46,261 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 18:23:46,261 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [44] total 44 [2020-10-14 18:23:46,261 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [952614022] [2020-10-14 18:23:46,262 INFO L459 AbstractCegarLoop]: Interpolant automaton has 44 states [2020-10-14 18:23:46,262 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 18:23:46,262 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2020-10-14 18:23:46,263 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=826, Invalid=1066, Unknown=0, NotChecked=0, Total=1892 [2020-10-14 18:23:46,263 INFO L87 Difference]: Start difference. First operand 103 states and 107 transitions. Second operand 44 states. [2020-10-14 18:23:46,888 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 18:23:46,888 INFO L93 Difference]: Finished difference Result 124 states and 132 transitions. [2020-10-14 18:23:46,889 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2020-10-14 18:23:46,889 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 96 [2020-10-14 18:23:46,889 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 18:23:46,890 INFO L225 Difference]: With dead ends: 124 [2020-10-14 18:23:46,890 INFO L226 Difference]: Without dead ends: 106 [2020-10-14 18:23:46,891 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=878, Invalid=1284, Unknown=0, NotChecked=0, Total=2162 [2020-10-14 18:23:46,892 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2020-10-14 18:23:46,896 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 105. [2020-10-14 18:23:46,896 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 105 states. [2020-10-14 18:23:46,897 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 109 transitions. [2020-10-14 18:23:46,897 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 109 transitions. Word has length 96 [2020-10-14 18:23:46,897 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 18:23:46,897 INFO L479 AbstractCegarLoop]: Abstraction has 105 states and 109 transitions. [2020-10-14 18:23:46,897 INFO L480 AbstractCegarLoop]: Interpolant automaton has 44 states. [2020-10-14 18:23:46,897 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 109 transitions. [2020-10-14 18:23:46,898 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2020-10-14 18:23:46,898 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 18:23:46,898 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, 1] [2020-10-14 18:23:46,898 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2020-10-14 18:23:46,899 INFO L427 AbstractCegarLoop]: === Iteration 40 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 18:23:46,899 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 18:23:46,899 INFO L82 PathProgramCache]: Analyzing trace with hash 78189844, now seen corresponding path program 39 times [2020-10-14 18:23:46,899 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 18:23:46,899 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1573013909] [2020-10-14 18:23:46,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 18:23:46,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:23:46,940 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:23:46,971 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:23:51,932 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:23:51,933 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 108 [2020-10-14 18:23:51,933 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 18:23:51,933 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5008 [2020-10-14 18:23:51,933 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:23:51,933 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:23:51,933 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 42 [2020-10-14 18:23:51,933 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-14 18:23:51,934 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 82 [2020-10-14 18:23:51,934 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:23:51,960 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 18:23:51,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:23:51,962 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:23:51,963 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:23:51,963 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 18:23:51,963 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:23:51,963 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 18:23:51,964 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:23:51,964 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:23:51,964 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:23:51,964 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:23:51,964 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:23:51,964 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:23:51,974 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-14 18:23:51,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:23:52,018 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:23:54,114 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:23:54,114 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 87 [2020-10-14 18:23:54,114 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:23:54,114 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2116 [2020-10-14 18:23:54,114 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:23:54,114 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:23:54,115 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 42 [2020-10-14 18:23:54,115 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-14 18:23:54,115 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 84 [2020-10-14 18:23:54,115 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:23:55,594 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 18:23:55,595 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1573013909] [2020-10-14 18:23:55,595 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 18:23:55,595 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [45] total 45 [2020-10-14 18:23:55,595 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1097075808] [2020-10-14 18:23:55,595 INFO L459 AbstractCegarLoop]: Interpolant automaton has 45 states [2020-10-14 18:23:55,595 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 18:23:55,596 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2020-10-14 18:23:55,596 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=867, Invalid=1113, Unknown=0, NotChecked=0, Total=1980 [2020-10-14 18:23:55,596 INFO L87 Difference]: Start difference. First operand 105 states and 109 transitions. Second operand 45 states. [2020-10-14 18:23:56,028 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 18:23:56,029 INFO L93 Difference]: Finished difference Result 126 states and 134 transitions. [2020-10-14 18:23:56,029 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2020-10-14 18:23:56,029 INFO L78 Accepts]: Start accepts. Automaton has 45 states. Word has length 98 [2020-10-14 18:23:56,030 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 18:23:56,030 INFO L225 Difference]: With dead ends: 126 [2020-10-14 18:23:56,030 INFO L226 Difference]: Without dead ends: 108 [2020-10-14 18:23:56,031 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=920, Invalid=1336, Unknown=0, NotChecked=0, Total=2256 [2020-10-14 18:23:56,031 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2020-10-14 18:23:56,036 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 107. [2020-10-14 18:23:56,036 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 107 states. [2020-10-14 18:23:56,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 111 transitions. [2020-10-14 18:23:56,037 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 111 transitions. Word has length 98 [2020-10-14 18:23:56,037 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 18:23:56,037 INFO L479 AbstractCegarLoop]: Abstraction has 107 states and 111 transitions. [2020-10-14 18:23:56,037 INFO L480 AbstractCegarLoop]: Interpolant automaton has 45 states. [2020-10-14 18:23:56,037 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 111 transitions. [2020-10-14 18:23:56,038 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2020-10-14 18:23:56,038 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 18:23:56,038 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, 1] [2020-10-14 18:23:56,038 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2020-10-14 18:23:56,038 INFO L427 AbstractCegarLoop]: === Iteration 41 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 18:23:56,038 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 18:23:56,039 INFO L82 PathProgramCache]: Analyzing trace with hash 1018053270, now seen corresponding path program 40 times [2020-10-14 18:23:56,039 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 18:23:56,039 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [759611671] [2020-10-14 18:23:56,039 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 18:23:56,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:23:56,079 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:23:56,115 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:24:01,078 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:24:01,078 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 110 [2020-10-14 18:24:01,078 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 18:24:01,078 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5016 [2020-10-14 18:24:01,079 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:24:01,079 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:24:01,079 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 43 [2020-10-14 18:24:01,079 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-14 18:24:01,079 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 84 [2020-10-14 18:24:01,079 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:24:01,106 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 18:24:01,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:24:01,108 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:24:01,109 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:24:01,109 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 18:24:01,109 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:24:01,109 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 18:24:01,110 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:24:01,110 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:24:01,110 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:24:01,110 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:24:01,110 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:24:01,111 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:24:01,132 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-14 18:24:01,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:24:01,168 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:24:03,487 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:24:03,488 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 89 [2020-10-14 18:24:03,488 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:24:03,488 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2334 [2020-10-14 18:24:03,488 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:24:03,488 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:24:03,488 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 43 [2020-10-14 18:24:03,488 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-14 18:24:03,488 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 86 [2020-10-14 18:24:03,489 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:24:06,679 INFO L134 CoverageAnalysis]: Checked inductivity of 1600 backedges. 0 proven. 1600 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 18:24:06,679 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [759611671] [2020-10-14 18:24:06,680 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 18:24:06,680 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [46] total 46 [2020-10-14 18:24:06,680 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1817115055] [2020-10-14 18:24:06,680 INFO L459 AbstractCegarLoop]: Interpolant automaton has 46 states [2020-10-14 18:24:06,680 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 18:24:06,681 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2020-10-14 18:24:06,681 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=909, Invalid=1161, Unknown=0, NotChecked=0, Total=2070 [2020-10-14 18:24:06,681 INFO L87 Difference]: Start difference. First operand 107 states and 111 transitions. Second operand 46 states. [2020-10-14 18:24:07,434 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 18:24:07,435 INFO L93 Difference]: Finished difference Result 128 states and 136 transitions. [2020-10-14 18:24:07,435 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2020-10-14 18:24:07,436 INFO L78 Accepts]: Start accepts. Automaton has 46 states. Word has length 100 [2020-10-14 18:24:07,436 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 18:24:07,437 INFO L225 Difference]: With dead ends: 128 [2020-10-14 18:24:07,438 INFO L226 Difference]: Without dead ends: 110 [2020-10-14 18:24:07,438 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=1003, Invalid=1349, Unknown=0, NotChecked=0, Total=2352 [2020-10-14 18:24:07,439 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2020-10-14 18:24:07,443 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 109. [2020-10-14 18:24:07,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 109 states. [2020-10-14 18:24:07,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 113 transitions. [2020-10-14 18:24:07,444 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 113 transitions. Word has length 100 [2020-10-14 18:24:07,445 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 18:24:07,445 INFO L479 AbstractCegarLoop]: Abstraction has 109 states and 113 transitions. [2020-10-14 18:24:07,445 INFO L480 AbstractCegarLoop]: Interpolant automaton has 46 states. [2020-10-14 18:24:07,445 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 113 transitions. [2020-10-14 18:24:07,445 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2020-10-14 18:24:07,446 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 18:24:07,446 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, 1] [2020-10-14 18:24:07,446 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2020-10-14 18:24:07,446 INFO L427 AbstractCegarLoop]: === Iteration 42 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 18:24:07,446 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 18:24:07,446 INFO L82 PathProgramCache]: Analyzing trace with hash -2011293800, now seen corresponding path program 41 times [2020-10-14 18:24:07,447 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 18:24:07,447 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1141976375] [2020-10-14 18:24:07,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 18:24:07,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:24:07,490 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:24:07,525 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:24:12,488 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:24:12,489 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 112 [2020-10-14 18:24:12,489 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 18:24:12,489 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5016 [2020-10-14 18:24:12,489 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:24:12,489 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:24:12,489 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 44 [2020-10-14 18:24:12,489 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-14 18:24:12,489 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 86 [2020-10-14 18:24:12,489 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:24:12,519 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 18:24:12,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:24:12,520 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:24:12,521 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:24:12,522 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 18:24:12,522 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:24:12,522 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 18:24:12,522 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:24:12,522 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:24:12,522 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:24:12,522 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:24:12,523 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:24:12,523 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:24:12,535 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-14 18:24:12,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:24:12,577 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:24:15,107 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:24:15,107 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 91 [2020-10-14 18:24:15,107 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:24:15,107 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2548 [2020-10-14 18:24:15,108 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:24:15,108 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:24:15,108 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 44 [2020-10-14 18:24:15,108 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-14 18:24:15,108 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 88 [2020-10-14 18:24:15,108 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:24:18,403 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 18:24:18,404 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1141976375] [2020-10-14 18:24:18,404 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 18:24:18,404 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [47] total 47 [2020-10-14 18:24:18,404 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1031115414] [2020-10-14 18:24:18,404 INFO L459 AbstractCegarLoop]: Interpolant automaton has 47 states [2020-10-14 18:24:18,404 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 18:24:18,405 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2020-10-14 18:24:18,405 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=952, Invalid=1210, Unknown=0, NotChecked=0, Total=2162 [2020-10-14 18:24:18,406 INFO L87 Difference]: Start difference. First operand 109 states and 113 transitions. Second operand 47 states. [2020-10-14 18:24:18,933 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 18:24:18,933 INFO L93 Difference]: Finished difference Result 130 states and 138 transitions. [2020-10-14 18:24:18,933 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2020-10-14 18:24:18,934 INFO L78 Accepts]: Start accepts. Automaton has 47 states. Word has length 102 [2020-10-14 18:24:18,934 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 18:24:18,935 INFO L225 Difference]: With dead ends: 130 [2020-10-14 18:24:18,935 INFO L226 Difference]: Without dead ends: 112 [2020-10-14 18:24:18,936 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=1048, Invalid=1402, Unknown=0, NotChecked=0, Total=2450 [2020-10-14 18:24:18,936 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2020-10-14 18:24:18,941 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 111. [2020-10-14 18:24:18,942 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 111 states. [2020-10-14 18:24:18,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 115 transitions. [2020-10-14 18:24:18,942 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 115 transitions. Word has length 102 [2020-10-14 18:24:18,943 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 18:24:18,943 INFO L479 AbstractCegarLoop]: Abstraction has 111 states and 115 transitions. [2020-10-14 18:24:18,943 INFO L480 AbstractCegarLoop]: Interpolant automaton has 47 states. [2020-10-14 18:24:18,943 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 115 transitions. [2020-10-14 18:24:18,944 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2020-10-14 18:24:18,944 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 18:24:18,944 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, 1] [2020-10-14 18:24:18,944 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2020-10-14 18:24:18,944 INFO L427 AbstractCegarLoop]: === Iteration 43 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 18:24:18,944 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 18:24:18,945 INFO L82 PathProgramCache]: Analyzing trace with hash -1226001382, now seen corresponding path program 42 times [2020-10-14 18:24:18,945 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 18:24:18,945 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [265557268] [2020-10-14 18:24:18,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 18:24:18,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:24:18,997 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:24:19,032 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:24:24,028 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:24:24,028 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 114 [2020-10-14 18:24:24,028 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 18:24:24,028 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5049 [2020-10-14 18:24:24,028 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:24:24,029 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:24:24,029 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 45 [2020-10-14 18:24:24,029 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-14 18:24:24,029 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 88 [2020-10-14 18:24:24,029 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:24:24,058 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 18:24:24,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:24:24,060 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:24:24,061 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:24:24,061 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 18:24:24,061 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:24:24,062 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 18:24:24,062 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:24:24,062 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:24:24,062 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:24:24,062 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:24:24,063 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:24:24,063 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:24:24,077 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-14 18:24:24,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:24:24,139 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:24:26,645 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:24:26,645 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 93 [2020-10-14 18:24:26,645 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:24:26,645 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2533 [2020-10-14 18:24:26,645 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:24:26,645 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:24:26,645 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 45 [2020-10-14 18:24:26,646 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-14 18:24:26,646 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 90 [2020-10-14 18:24:26,646 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:24:28,371 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 18:24:28,372 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [265557268] [2020-10-14 18:24:28,372 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 18:24:28,372 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [48] total 48 [2020-10-14 18:24:28,372 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1571540722] [2020-10-14 18:24:28,372 INFO L459 AbstractCegarLoop]: Interpolant automaton has 48 states [2020-10-14 18:24:28,373 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 18:24:28,373 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2020-10-14 18:24:28,373 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=996, Invalid=1260, Unknown=0, NotChecked=0, Total=2256 [2020-10-14 18:24:28,373 INFO L87 Difference]: Start difference. First operand 111 states and 115 transitions. Second operand 48 states. [2020-10-14 18:24:28,823 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 18:24:28,824 INFO L93 Difference]: Finished difference Result 132 states and 140 transitions. [2020-10-14 18:24:28,824 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2020-10-14 18:24:28,824 INFO L78 Accepts]: Start accepts. Automaton has 48 states. Word has length 104 [2020-10-14 18:24:28,825 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 18:24:28,825 INFO L225 Difference]: With dead ends: 132 [2020-10-14 18:24:28,826 INFO L226 Difference]: Without dead ends: 114 [2020-10-14 18:24:28,826 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=1052, Invalid=1498, Unknown=0, NotChecked=0, Total=2550 [2020-10-14 18:24:28,827 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2020-10-14 18:24:28,834 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 113. [2020-10-14 18:24:28,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 113 states. [2020-10-14 18:24:28,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 117 transitions. [2020-10-14 18:24:28,836 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 117 transitions. Word has length 104 [2020-10-14 18:24:28,836 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 18:24:28,838 INFO L479 AbstractCegarLoop]: Abstraction has 113 states and 117 transitions. [2020-10-14 18:24:28,838 INFO L480 AbstractCegarLoop]: Interpolant automaton has 48 states. [2020-10-14 18:24:28,838 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 117 transitions. [2020-10-14 18:24:28,839 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2020-10-14 18:24:28,839 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 18:24:28,839 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, 1] [2020-10-14 18:24:28,839 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2020-10-14 18:24:28,839 INFO L427 AbstractCegarLoop]: === Iteration 44 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 18:24:28,839 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 18:24:28,840 INFO L82 PathProgramCache]: Analyzing trace with hash 1820735516, now seen corresponding path program 43 times [2020-10-14 18:24:28,840 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 18:24:28,840 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [190428532] [2020-10-14 18:24:28,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 18:24:28,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:24:28,919 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:24:28,974 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:24:33,884 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:24:33,884 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 116 [2020-10-14 18:24:33,884 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 18:24:33,884 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-14 18:24:33,884 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:24:33,884 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:24:33,885 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 46 [2020-10-14 18:24:33,885 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-14 18:24:33,885 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 90 [2020-10-14 18:24:33,885 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:24:33,921 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 18:24:33,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:24:33,922 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:24:33,923 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:24:33,924 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 18:24:33,924 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:24:33,924 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 18:24:33,924 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:24:33,924 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:24:33,924 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:24:33,924 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:24:33,925 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:24:33,925 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:24:33,945 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-14 18:24:33,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:24:33,994 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:24:37,023 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:24:37,023 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 95 [2020-10-14 18:24:37,023 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:24:37,023 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3049 [2020-10-14 18:24:37,023 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:24:37,023 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:24:37,024 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 46 [2020-10-14 18:24:37,024 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-14 18:24:37,024 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 92 [2020-10-14 18:24:37,024 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:24:38,789 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 18:24:38,789 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [190428532] [2020-10-14 18:24:38,790 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 18:24:38,790 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [49] total 49 [2020-10-14 18:24:38,790 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [193825321] [2020-10-14 18:24:38,790 INFO L459 AbstractCegarLoop]: Interpolant automaton has 49 states [2020-10-14 18:24:38,790 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 18:24:38,791 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2020-10-14 18:24:38,791 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1041, Invalid=1311, Unknown=0, NotChecked=0, Total=2352 [2020-10-14 18:24:38,791 INFO L87 Difference]: Start difference. First operand 113 states and 117 transitions. Second operand 49 states. [2020-10-14 18:24:39,525 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 18:24:39,525 INFO L93 Difference]: Finished difference Result 134 states and 142 transitions. [2020-10-14 18:24:39,526 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2020-10-14 18:24:39,526 INFO L78 Accepts]: Start accepts. Automaton has 49 states. Word has length 106 [2020-10-14 18:24:39,527 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 18:24:39,527 INFO L225 Difference]: With dead ends: 134 [2020-10-14 18:24:39,528 INFO L226 Difference]: Without dead ends: 116 [2020-10-14 18:24:39,528 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=1098, Invalid=1554, Unknown=0, NotChecked=0, Total=2652 [2020-10-14 18:24:39,528 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2020-10-14 18:24:39,533 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 115. [2020-10-14 18:24:39,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 115 states. [2020-10-14 18:24:39,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 119 transitions. [2020-10-14 18:24:39,534 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 119 transitions. Word has length 106 [2020-10-14 18:24:39,534 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 18:24:39,534 INFO L479 AbstractCegarLoop]: Abstraction has 115 states and 119 transitions. [2020-10-14 18:24:39,534 INFO L480 AbstractCegarLoop]: Interpolant automaton has 49 states. [2020-10-14 18:24:39,534 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 119 transitions. [2020-10-14 18:24:39,535 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2020-10-14 18:24:39,535 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 18:24:39,535 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, 1] [2020-10-14 18:24:39,535 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2020-10-14 18:24:39,536 INFO L427 AbstractCegarLoop]: === Iteration 45 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 18:24:39,536 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 18:24:39,536 INFO L82 PathProgramCache]: Analyzing trace with hash 567198622, now seen corresponding path program 44 times [2020-10-14 18:24:39,536 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 18:24:39,536 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1659120201] [2020-10-14 18:24:39,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 18:24:39,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:24:39,579 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:24:39,616 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:24:44,599 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:24:44,599 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 118 [2020-10-14 18:24:44,599 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 18:24:44,599 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5038 [2020-10-14 18:24:44,599 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:24:44,600 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:24:44,600 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 47 [2020-10-14 18:24:44,600 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-14 18:24:44,600 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 92 [2020-10-14 18:24:44,600 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:24:44,638 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 18:24:44,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:24:44,639 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:24:44,639 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:24:44,640 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 18:24:44,640 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:24:44,640 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 18:24:44,640 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:24:44,640 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:24:44,641 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:24:44,641 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:24:44,641 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:24:44,641 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:24:44,652 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-14 18:24:44,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:24:44,695 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:24:47,668 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:24:47,668 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 97 [2020-10-14 18:24:47,668 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:24:47,668 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2992 [2020-10-14 18:24:47,669 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:24:47,669 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:24:47,669 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 47 [2020-10-14 18:24:47,669 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-14 18:24:47,669 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 94 [2020-10-14 18:24:47,669 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:24:51,453 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 18:24:51,453 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1659120201] [2020-10-14 18:24:51,453 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 18:24:51,453 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [50] total 50 [2020-10-14 18:24:51,454 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [396927629] [2020-10-14 18:24:51,454 INFO L459 AbstractCegarLoop]: Interpolant automaton has 50 states [2020-10-14 18:24:51,454 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 18:24:51,454 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2020-10-14 18:24:51,455 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1087, Invalid=1363, Unknown=0, NotChecked=0, Total=2450 [2020-10-14 18:24:51,455 INFO L87 Difference]: Start difference. First operand 115 states and 119 transitions. Second operand 50 states. [2020-10-14 18:24:52,266 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 18:24:52,266 INFO L93 Difference]: Finished difference Result 136 states and 144 transitions. [2020-10-14 18:24:52,273 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2020-10-14 18:24:52,273 INFO L78 Accepts]: Start accepts. Automaton has 50 states. Word has length 108 [2020-10-14 18:24:52,273 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 18:24:52,274 INFO L225 Difference]: With dead ends: 136 [2020-10-14 18:24:52,274 INFO L226 Difference]: Without dead ends: 118 [2020-10-14 18:24:52,275 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=1189, Invalid=1567, Unknown=0, NotChecked=0, Total=2756 [2020-10-14 18:24:52,275 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2020-10-14 18:24:52,281 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 117. [2020-10-14 18:24:52,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 117 states. [2020-10-14 18:24:52,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 121 transitions. [2020-10-14 18:24:52,282 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 121 transitions. Word has length 108 [2020-10-14 18:24:52,282 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 18:24:52,283 INFO L479 AbstractCegarLoop]: Abstraction has 117 states and 121 transitions. [2020-10-14 18:24:52,283 INFO L480 AbstractCegarLoop]: Interpolant automaton has 50 states. [2020-10-14 18:24:52,283 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 121 transitions. [2020-10-14 18:24:52,283 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2020-10-14 18:24:52,283 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 18:24:52,283 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, 1] [2020-10-14 18:24:52,283 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2020-10-14 18:24:52,284 INFO L427 AbstractCegarLoop]: === Iteration 46 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 18:24:52,284 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 18:24:52,284 INFO L82 PathProgramCache]: Analyzing trace with hash -1490913632, now seen corresponding path program 45 times [2020-10-14 18:24:52,284 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 18:24:52,284 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1534417786] [2020-10-14 18:24:52,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 18:24:52,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:24:52,350 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:24:52,462 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:24:57,327 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:24:57,327 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 120 [2020-10-14 18:24:57,327 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 18:24:57,327 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-10-14 18:24:57,327 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:24:57,327 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:24:57,328 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 48 [2020-10-14 18:24:57,328 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-14 18:24:57,328 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 94 [2020-10-14 18:24:57,328 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:24:57,362 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 18:24:57,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:24:57,363 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:24:57,364 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:24:57,364 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 18:24:57,364 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:24:57,364 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 18:24:57,365 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:24:57,365 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:24:57,365 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:24:57,365 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:24:57,365 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:24:57,365 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:24:57,378 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-14 18:24:57,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:24:57,424 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:25:00,584 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:25:00,585 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 99 [2020-10-14 18:25:00,585 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:25:00,585 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3181 [2020-10-14 18:25:00,585 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:25:00,585 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:25:00,585 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 48 [2020-10-14 18:25:00,585 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-14 18:25:00,586 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 96 [2020-10-14 18:25:00,586 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:25:02,584 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 18:25:02,584 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1534417786] [2020-10-14 18:25:02,584 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 18:25:02,584 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [51] total 51 [2020-10-14 18:25:02,584 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [446977803] [2020-10-14 18:25:02,585 INFO L459 AbstractCegarLoop]: Interpolant automaton has 51 states [2020-10-14 18:25:02,585 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 18:25:02,586 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2020-10-14 18:25:02,586 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1134, Invalid=1416, Unknown=0, NotChecked=0, Total=2550 [2020-10-14 18:25:02,586 INFO L87 Difference]: Start difference. First operand 117 states and 121 transitions. Second operand 51 states. [2020-10-14 18:25:03,097 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 18:25:03,097 INFO L93 Difference]: Finished difference Result 138 states and 146 transitions. [2020-10-14 18:25:03,098 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2020-10-14 18:25:03,098 INFO L78 Accepts]: Start accepts. Automaton has 51 states. Word has length 110 [2020-10-14 18:25:03,099 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 18:25:03,100 INFO L225 Difference]: With dead ends: 138 [2020-10-14 18:25:03,100 INFO L226 Difference]: Without dead ends: 120 [2020-10-14 18:25:03,101 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=1193, Invalid=1669, Unknown=0, NotChecked=0, Total=2862 [2020-10-14 18:25:03,101 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2020-10-14 18:25:03,105 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 119. [2020-10-14 18:25:03,105 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 119 states. [2020-10-14 18:25:03,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 123 transitions. [2020-10-14 18:25:03,106 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 123 transitions. Word has length 110 [2020-10-14 18:25:03,107 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 18:25:03,107 INFO L479 AbstractCegarLoop]: Abstraction has 119 states and 123 transitions. [2020-10-14 18:25:03,107 INFO L480 AbstractCegarLoop]: Interpolant automaton has 51 states. [2020-10-14 18:25:03,107 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 123 transitions. [2020-10-14 18:25:03,108 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2020-10-14 18:25:03,108 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 18:25:03,108 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, 1] [2020-10-14 18:25:03,108 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2020-10-14 18:25:03,108 INFO L427 AbstractCegarLoop]: === Iteration 47 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 18:25:03,108 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 18:25:03,108 INFO L82 PathProgramCache]: Analyzing trace with hash 643133730, now seen corresponding path program 46 times [2020-10-14 18:25:03,109 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 18:25:03,109 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [754022969] [2020-10-14 18:25:03,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 18:25:03,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:25:03,157 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:25:03,341 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:25:08,153 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:25:08,153 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 122 [2020-10-14 18:25:08,153 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 18:25:08,153 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5017 [2020-10-14 18:25:08,153 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:25:08,153 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:25:08,154 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 49 [2020-10-14 18:25:08,154 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-14 18:25:08,154 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 96 [2020-10-14 18:25:08,154 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:25:08,190 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 18:25:08,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:25:08,192 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:25:08,193 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:25:08,193 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 18:25:08,193 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:25:08,193 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 18:25:08,193 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:25:08,193 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:25:08,193 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:25:08,194 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:25:08,194 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:25:08,194 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:25:08,206 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-14 18:25:08,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:25:08,255 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:25:11,842 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:25:11,843 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 101 [2020-10-14 18:25:11,843 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:25:11,843 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3610 [2020-10-14 18:25:11,843 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:25:11,843 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:25:11,843 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 49 [2020-10-14 18:25:11,843 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-14 18:25:11,843 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 98 [2020-10-14 18:25:11,843 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:25:13,917 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 18:25:13,917 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [754022969] [2020-10-14 18:25:13,918 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 18:25:13,918 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [52] total 52 [2020-10-14 18:25:13,918 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1210991568] [2020-10-14 18:25:13,918 INFO L459 AbstractCegarLoop]: Interpolant automaton has 52 states [2020-10-14 18:25:13,918 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 18:25:13,919 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2020-10-14 18:25:13,919 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1182, Invalid=1470, Unknown=0, NotChecked=0, Total=2652 [2020-10-14 18:25:13,919 INFO L87 Difference]: Start difference. First operand 119 states and 123 transitions. Second operand 52 states. [2020-10-14 18:25:14,600 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 18:25:14,601 INFO L93 Difference]: Finished difference Result 140 states and 148 transitions. [2020-10-14 18:25:14,601 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2020-10-14 18:25:14,601 INFO L78 Accepts]: Start accepts. Automaton has 52 states. Word has length 112 [2020-10-14 18:25:14,602 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 18:25:14,603 INFO L225 Difference]: With dead ends: 140 [2020-10-14 18:25:14,603 INFO L226 Difference]: Without dead ends: 122 [2020-10-14 18:25:14,604 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=1242, Invalid=1728, Unknown=0, NotChecked=0, Total=2970 [2020-10-14 18:25:14,604 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2020-10-14 18:25:14,610 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 121. [2020-10-14 18:25:14,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 121 states. [2020-10-14 18:25:14,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 125 transitions. [2020-10-14 18:25:14,611 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 125 transitions. Word has length 112 [2020-10-14 18:25:14,611 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 18:25:14,611 INFO L479 AbstractCegarLoop]: Abstraction has 121 states and 125 transitions. [2020-10-14 18:25:14,611 INFO L480 AbstractCegarLoop]: Interpolant automaton has 52 states. [2020-10-14 18:25:14,611 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 125 transitions. [2020-10-14 18:25:14,612 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2020-10-14 18:25:14,612 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 18:25:14,612 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, 1] [2020-10-14 18:25:14,612 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2020-10-14 18:25:14,613 INFO L427 AbstractCegarLoop]: === Iteration 48 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 18:25:14,613 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 18:25:14,613 INFO L82 PathProgramCache]: Analyzing trace with hash -1531718876, now seen corresponding path program 47 times [2020-10-14 18:25:14,613 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 18:25:14,613 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [474541458] [2020-10-14 18:25:14,614 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 18:25:14,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:25:14,681 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:25:14,803 FATAL L256 erpolLogProxyWrapper]: Now shrinking...