/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/loops-crafted-1/nested3-2.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-adbd35c [2020-10-15 00:04:45,766 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-15 00:04:45,772 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-15 00:04:45,806 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-15 00:04:45,807 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-15 00:04:45,815 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-15 00:04:45,817 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-15 00:04:45,820 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-15 00:04:45,823 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-15 00:04:45,825 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-15 00:04:45,826 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-15 00:04:45,827 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-15 00:04:45,827 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-15 00:04:45,830 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-15 00:04:45,832 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-15 00:04:45,834 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-15 00:04:45,835 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-15 00:04:45,836 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-15 00:04:45,837 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-15 00:04:45,846 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-15 00:04:45,848 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-15 00:04:45,849 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-15 00:04:45,850 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-15 00:04:45,850 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-15 00:04:45,861 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-15 00:04:45,861 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-15 00:04:45,861 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-15 00:04:45,863 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-15 00:04:45,864 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-15 00:04:45,865 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-15 00:04:45,865 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-15 00:04:45,867 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-15 00:04:45,867 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-15 00:04:45,868 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-15 00:04:45,869 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-15 00:04:45,869 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-15 00:04:45,870 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-15 00:04:45,870 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-15 00:04:45,871 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-15 00:04:45,872 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-15 00:04:45,873 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-15 00:04:45,874 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-15 00:04:45,913 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-15 00:04:45,913 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-15 00:04:45,915 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-15 00:04:45,915 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-15 00:04:45,915 INFO L138 SettingsManager]: * Use SBE=true [2020-10-15 00:04:45,915 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-15 00:04:45,916 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-15 00:04:45,916 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-15 00:04:45,916 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-15 00:04:45,916 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-15 00:04:45,917 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-15 00:04:45,918 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-15 00:04:45,918 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-15 00:04:45,918 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-15 00:04:45,918 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-15 00:04:45,919 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-15 00:04:45,919 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-15 00:04:45,919 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-15 00:04:45,919 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-15 00:04:45,919 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-15 00:04:45,920 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-15 00:04:45,920 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-15 00:04:45,920 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-15 00:04:45,920 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-15 00:04:45,920 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-15 00:04:45,921 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-15 00:04:45,921 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-15 00:04:45,921 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-15 00:04:45,921 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-15 00:04:45,921 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; [2020-10-15 00:04:46,198 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-15 00:04:46,210 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-15 00:04:46,214 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-15 00:04:46,215 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-15 00:04:46,215 INFO L275 PluginConnector]: CDTParser initialized [2020-10-15 00:04:46,216 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops-crafted-1/nested3-2.c [2020-10-15 00:04:46,267 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/a6c0f578a/aaca921351f54fa0b07cbd5d31a31cdb/FLAG6e20b0f14 [2020-10-15 00:04:46,701 INFO L306 CDTParser]: Found 1 translation units. [2020-10-15 00:04:46,702 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/loops-crafted-1/nested3-2.c [2020-10-15 00:04:46,708 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/a6c0f578a/aaca921351f54fa0b07cbd5d31a31cdb/FLAG6e20b0f14 [2020-10-15 00:04:47,091 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/a6c0f578a/aaca921351f54fa0b07cbd5d31a31cdb [2020-10-15 00:04:47,101 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-15 00:04:47,102 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-15 00:04:47,103 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-15 00:04:47,104 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-15 00:04:47,107 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-15 00:04:47,108 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 12:04:47" (1/1) ... [2020-10-15 00:04:47,111 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1808924a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:04:47, skipping insertion in model container [2020-10-15 00:04:47,112 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 12:04:47" (1/1) ... [2020-10-15 00:04:47,120 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-15 00:04:47,140 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-15 00:04:47,363 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-15 00:04:47,367 INFO L203 MainTranslator]: Completed pre-run [2020-10-15 00:04:47,384 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-15 00:04:47,396 INFO L208 MainTranslator]: Completed translation [2020-10-15 00:04:47,397 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:04:47 WrapperNode [2020-10-15 00:04:47,397 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-15 00:04:47,398 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-15 00:04:47,398 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-15 00:04:47,398 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-15 00:04:47,409 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:04:47" (1/1) ... [2020-10-15 00:04:47,409 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:04:47" (1/1) ... [2020-10-15 00:04:47,491 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:04:47" (1/1) ... [2020-10-15 00:04:47,492 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:04:47" (1/1) ... [2020-10-15 00:04:47,496 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:04:47" (1/1) ... [2020-10-15 00:04:47,501 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:04:47" (1/1) ... [2020-10-15 00:04:47,502 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:04:47" (1/1) ... [2020-10-15 00:04:47,504 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-15 00:04:47,504 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-15 00:04:47,504 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-15 00:04:47,504 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-15 00:04:47,505 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:04:47" (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 [2020-10-15 00:04:47,559 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-15 00:04:47,559 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-15 00:04:47,559 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-15 00:04:47,559 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-15 00:04:47,559 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-10-15 00:04:47,559 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-15 00:04:47,560 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-15 00:04:47,560 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-15 00:04:47,560 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-15 00:04:47,759 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-15 00:04:47,759 INFO L295 CfgBuilder]: Removed 3 assume(true) statements. [2020-10-15 00:04:47,763 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 12:04:47 BoogieIcfgContainer [2020-10-15 00:04:47,763 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-15 00:04:47,765 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-15 00:04:47,765 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-15 00:04:47,768 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-15 00:04:47,768 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.10 12:04:47" (1/3) ... [2020-10-15 00:04:47,769 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1dbb839b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 12:04:47, skipping insertion in model container [2020-10-15 00:04:47,769 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:04:47" (2/3) ... [2020-10-15 00:04:47,770 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1dbb839b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 12:04:47, skipping insertion in model container [2020-10-15 00:04:47,770 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 12:04:47" (3/3) ... [2020-10-15 00:04:47,772 INFO L109 eAbstractionObserver]: Analyzing ICFG nested3-2.c [2020-10-15 00:04:47,782 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-15 00:04:47,789 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-15 00:04:47,805 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-15 00:04:47,842 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-10-15 00:04:47,842 INFO L376 AbstractCegarLoop]: Hoare is true [2020-10-15 00:04:47,843 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-15 00:04:47,843 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-15 00:04:47,843 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-15 00:04:47,844 INFO L380 AbstractCegarLoop]: Difference is false [2020-10-15 00:04:47,844 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-15 00:04:47,844 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-15 00:04:47,868 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states. [2020-10-15 00:04:47,875 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-10-15 00:04:47,875 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 00:04:47,876 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 00:04:47,877 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 00:04:47,884 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 00:04:47,884 INFO L82 PathProgramCache]: Analyzing trace with hash -557519811, now seen corresponding path program 1 times [2020-10-15 00:04:47,894 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 00:04:47,895 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1517887270] [2020-10-15 00:04:47,895 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 00:04:48,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:04:48,024 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:04:48,070 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:04:48,260 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:04:48,261 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 18 [2020-10-15 00:04:48,261 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-15 00:04:48,265 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 245 [2020-10-15 00:04:48,271 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:04:48,272 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:04:48,272 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-15 00:04:48,272 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-15 00:04:48,273 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-15 00:04:48,273 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 7 [2020-10-15 00:04:48,477 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 15 [2020-10-15 00:04:48,496 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 00:04:48,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:04:48,499 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:04:48,501 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:04:48,502 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-15 00:04:48,502 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:04:48,502 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-15 00:04:48,503 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:04:48,503 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:04:48,503 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 00:04:48,504 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 00:04:48,504 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 00:04:48,505 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-15 00:04:48,510 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 00:04:48,511 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1517887270] [2020-10-15 00:04:48,513 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-15 00:04:48,514 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-15 00:04:48,515 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [588708495] [2020-10-15 00:04:48,520 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-15 00:04:48,520 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 00:04:48,535 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-15 00:04:48,536 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-15 00:04:48,538 INFO L87 Difference]: Start difference. First operand 24 states. Second operand 5 states. [2020-10-15 00:04:48,642 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 00:04:48,642 INFO L93 Difference]: Finished difference Result 58 states and 89 transitions. [2020-10-15 00:04:48,643 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-15 00:04:48,644 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 10 [2020-10-15 00:04:48,645 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 00:04:48,655 INFO L225 Difference]: With dead ends: 58 [2020-10-15 00:04:48,656 INFO L226 Difference]: Without dead ends: 26 [2020-10-15 00:04:48,660 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-15 00:04:48,678 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2020-10-15 00:04:48,703 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 20. [2020-10-15 00:04:48,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2020-10-15 00:04:48,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 24 transitions. [2020-10-15 00:04:48,707 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 24 transitions. Word has length 10 [2020-10-15 00:04:48,708 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 00:04:48,708 INFO L479 AbstractCegarLoop]: Abstraction has 20 states and 24 transitions. [2020-10-15 00:04:48,708 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-15 00:04:48,708 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 24 transitions. [2020-10-15 00:04:48,709 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-10-15 00:04:48,709 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 00:04:48,709 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 00:04:48,710 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-15 00:04:48,710 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 00:04:48,710 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 00:04:48,711 INFO L82 PathProgramCache]: Analyzing trace with hash -1005021419, now seen corresponding path program 1 times [2020-10-15 00:04:48,711 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 00:04:48,711 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1444980502] [2020-10-15 00:04:48,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 00:04:48,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:04:48,730 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:04:48,756 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:04:48,940 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:04:48,941 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 19 [2020-10-15 00:04:48,941 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-15 00:04:48,941 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 216 [2020-10-15 00:04:48,942 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:04:48,942 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:04:48,942 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-15 00:04:48,942 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-15 00:04:48,942 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-15 00:04:48,943 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-15 00:04:49,079 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 00:04:49,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:04:49,081 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:04:49,082 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:04:49,083 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-15 00:04:49,083 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:04:49,083 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-15 00:04:49,084 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:04:49,084 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:04:49,084 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 00:04:49,085 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 00:04:49,085 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 00:04:49,085 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-15 00:04:49,088 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 00:04:49,088 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1444980502] [2020-10-15 00:04:49,089 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-15 00:04:49,089 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-15 00:04:49,089 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1128882777] [2020-10-15 00:04:49,091 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-15 00:04:49,091 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 00:04:49,092 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-15 00:04:49,092 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-15 00:04:49,092 INFO L87 Difference]: Start difference. First operand 20 states and 24 transitions. Second operand 5 states. [2020-10-15 00:04:49,174 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 00:04:49,174 INFO L93 Difference]: Finished difference Result 34 states and 42 transitions. [2020-10-15 00:04:49,175 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-15 00:04:49,175 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 11 [2020-10-15 00:04:49,175 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 00:04:49,176 INFO L225 Difference]: With dead ends: 34 [2020-10-15 00:04:49,176 INFO L226 Difference]: Without dead ends: 32 [2020-10-15 00:04:49,177 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-15 00:04:49,178 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2020-10-15 00:04:49,184 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 26. [2020-10-15 00:04:49,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2020-10-15 00:04:49,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 31 transitions. [2020-10-15 00:04:49,186 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 31 transitions. Word has length 11 [2020-10-15 00:04:49,186 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 00:04:49,186 INFO L479 AbstractCegarLoop]: Abstraction has 26 states and 31 transitions. [2020-10-15 00:04:49,186 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-15 00:04:49,187 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 31 transitions. [2020-10-15 00:04:49,187 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-15 00:04:49,187 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 00:04:49,187 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 00:04:49,188 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-15 00:04:49,188 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 00:04:49,188 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 00:04:49,188 INFO L82 PathProgramCache]: Analyzing trace with hash -1066437398, now seen corresponding path program 1 times [2020-10-15 00:04:49,189 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 00:04:49,189 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [275593362] [2020-10-15 00:04:49,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 00:04:49,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:04:49,202 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:04:49,237 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:04:49,300 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:04:49,302 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 20 [2020-10-15 00:04:49,303 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-15 00:04:49,303 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 101 [2020-10-15 00:04:49,303 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:04:49,303 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:04:49,304 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-15 00:04:49,304 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-15 00:04:49,304 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-15 00:04:49,304 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-15 00:04:51,478 WARN L193 SmtUtils]: Spent 2.15 s on a formula simplification. DAG size of input: 43 DAG size of output: 17 [2020-10-15 00:04:51,499 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 00:04:51,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:04:51,504 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:04:51,507 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:04:51,508 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-15 00:04:51,508 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:04:51,508 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-15 00:04:51,508 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:04:51,509 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:04:51,509 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 00:04:51,509 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 00:04:51,509 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 00:04:51,509 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-15 00:04:51,511 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 00:04:51,512 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [275593362] [2020-10-15 00:04:51,512 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-15 00:04:51,512 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-15 00:04:51,512 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1431899200] [2020-10-15 00:04:51,513 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-15 00:04:51,515 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 00:04:51,515 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-15 00:04:51,516 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-15 00:04:51,516 INFO L87 Difference]: Start difference. First operand 26 states and 31 transitions. Second operand 5 states. [2020-10-15 00:04:51,605 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 00:04:51,605 INFO L93 Difference]: Finished difference Result 42 states and 53 transitions. [2020-10-15 00:04:51,607 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-15 00:04:51,607 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 12 [2020-10-15 00:04:51,607 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 00:04:51,611 INFO L225 Difference]: With dead ends: 42 [2020-10-15 00:04:51,612 INFO L226 Difference]: Without dead ends: 40 [2020-10-15 00:04:51,614 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-15 00:04:51,614 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2020-10-15 00:04:51,631 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 32. [2020-10-15 00:04:51,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2020-10-15 00:04:51,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 38 transitions. [2020-10-15 00:04:51,634 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 38 transitions. Word has length 12 [2020-10-15 00:04:51,634 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 00:04:51,634 INFO L479 AbstractCegarLoop]: Abstraction has 32 states and 38 transitions. [2020-10-15 00:04:51,634 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-15 00:04:51,635 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 38 transitions. [2020-10-15 00:04:51,636 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-15 00:04:51,636 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 00:04:51,636 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 00:04:51,636 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-15 00:04:51,636 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 00:04:51,637 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 00:04:51,637 INFO L82 PathProgramCache]: Analyzing trace with hash 1326481591, now seen corresponding path program 1 times [2020-10-15 00:04:51,637 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 00:04:51,638 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [494392304] [2020-10-15 00:04:51,638 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 00:04:51,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:04:51,659 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:04:51,744 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:04:51,745 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 21 [2020-10-15 00:04:51,745 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:04:51,745 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 91 [2020-10-15 00:04:51,745 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:04:51,745 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:04:51,746 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-15 00:04:51,746 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-15 00:04:51,746 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 3 [2020-10-15 00:04:51,746 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-15 00:04:51,794 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 00:04:51,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:04:51,795 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:04:51,797 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:04:51,797 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-15 00:04:51,798 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:04:51,798 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-15 00:04:51,798 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:04:51,798 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:04:51,798 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 00:04:51,799 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 00:04:51,799 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 00:04:51,799 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-15 00:04:51,801 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 00:04:51,801 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [494392304] [2020-10-15 00:04:51,802 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-15 00:04:51,802 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4] total 4 [2020-10-15 00:04:51,802 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [723122716] [2020-10-15 00:04:51,803 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-15 00:04:51,803 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 00:04:51,803 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-15 00:04:51,803 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-10-15 00:04:51,804 INFO L87 Difference]: Start difference. First operand 32 states and 38 transitions. Second operand 4 states. [2020-10-15 00:04:51,828 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 00:04:51,829 INFO L93 Difference]: Finished difference Result 59 states and 75 transitions. [2020-10-15 00:04:51,829 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-15 00:04:51,829 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 13 [2020-10-15 00:04:51,830 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 00:04:51,830 INFO L225 Difference]: With dead ends: 59 [2020-10-15 00:04:51,831 INFO L226 Difference]: Without dead ends: 33 [2020-10-15 00:04:51,831 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-10-15 00:04:51,832 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2020-10-15 00:04:51,837 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 28. [2020-10-15 00:04:51,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-10-15 00:04:51,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 33 transitions. [2020-10-15 00:04:51,838 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 33 transitions. Word has length 13 [2020-10-15 00:04:51,839 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 00:04:51,839 INFO L479 AbstractCegarLoop]: Abstraction has 28 states and 33 transitions. [2020-10-15 00:04:51,839 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-15 00:04:51,839 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 33 transitions. [2020-10-15 00:04:51,840 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 00:04:51,840 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 00:04:51,840 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 00:04:51,840 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-15 00:04:51,840 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 00:04:51,841 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 00:04:51,841 INFO L82 PathProgramCache]: Analyzing trace with hash -1802441078, now seen corresponding path program 2 times [2020-10-15 00:04:51,841 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 00:04:51,841 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [976668877] [2020-10-15 00:04:51,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 00:04:51,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:04:51,850 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:04:51,897 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:04:51,897 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 22 [2020-10-15 00:04:51,897 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:04:51,898 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 49 [2020-10-15 00:04:51,898 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:04:51,898 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:04:51,898 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-15 00:04:51,898 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-15 00:04:51,899 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 4 [2020-10-15 00:04:51,899 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-15 00:04:51,945 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 00:04:51,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:04:51,947 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:04:51,948 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:04:51,948 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-15 00:04:51,948 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:04:51,949 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-15 00:04:51,949 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:04:51,949 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:04:51,949 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 00:04:51,950 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 00:04:51,950 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 00:04:51,950 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-15 00:04:51,951 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 00:04:51,952 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [976668877] [2020-10-15 00:04:51,952 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-15 00:04:51,952 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-15 00:04:51,952 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [79093457] [2020-10-15 00:04:51,953 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-15 00:04:51,953 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 00:04:51,953 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-15 00:04:51,953 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-15 00:04:51,954 INFO L87 Difference]: Start difference. First operand 28 states and 33 transitions. Second operand 5 states. [2020-10-15 00:04:51,983 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 00:04:51,984 INFO L93 Difference]: Finished difference Result 56 states and 70 transitions. [2020-10-15 00:04:51,984 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-15 00:04:51,984 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 14 [2020-10-15 00:04:51,985 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 00:04:51,985 INFO L225 Difference]: With dead ends: 56 [2020-10-15 00:04:51,985 INFO L226 Difference]: Without dead ends: 34 [2020-10-15 00:04:51,986 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-15 00:04:51,987 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2020-10-15 00:04:51,992 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 29. [2020-10-15 00:04:51,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2020-10-15 00:04:51,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 34 transitions. [2020-10-15 00:04:51,993 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 34 transitions. Word has length 14 [2020-10-15 00:04:51,993 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 00:04:51,994 INFO L479 AbstractCegarLoop]: Abstraction has 29 states and 34 transitions. [2020-10-15 00:04:51,994 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-15 00:04:51,994 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 34 transitions. [2020-10-15 00:04:51,995 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-15 00:04:51,995 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 00:04:51,995 INFO L422 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 00:04:51,995 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-15 00:04:51,995 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 00:04:51,996 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 00:04:51,996 INFO L82 PathProgramCache]: Analyzing trace with hash -14796009, now seen corresponding path program 3 times [2020-10-15 00:04:51,996 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 00:04:51,996 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [221162305] [2020-10-15 00:04:51,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 00:04:52,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:04:52,008 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:04:52,067 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:04:52,068 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 23 [2020-10-15 00:04:52,068 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:04:52,068 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 63 [2020-10-15 00:04:52,068 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:04:52,069 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:04:52,069 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-15 00:04:52,069 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-15 00:04:52,070 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 5 [2020-10-15 00:04:52,070 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-15 00:04:52,137 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 00:04:52,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:04:52,138 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:04:52,139 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:04:52,140 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-15 00:04:52,140 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:04:52,140 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-15 00:04:52,140 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:04:52,141 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:04:52,141 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 00:04:52,141 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 00:04:52,142 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 00:04:52,142 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-15 00:04:52,144 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 00:04:52,144 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [221162305] [2020-10-15 00:04:52,145 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-15 00:04:52,145 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-15 00:04:52,145 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1539486377] [2020-10-15 00:04:52,146 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-15 00:04:52,146 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 00:04:52,146 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-15 00:04:52,147 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-15 00:04:52,147 INFO L87 Difference]: Start difference. First operand 29 states and 34 transitions. Second operand 6 states. [2020-10-15 00:04:52,186 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 00:04:52,187 INFO L93 Difference]: Finished difference Result 58 states and 72 transitions. [2020-10-15 00:04:52,187 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-15 00:04:52,187 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 15 [2020-10-15 00:04:52,188 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 00:04:52,188 INFO L225 Difference]: With dead ends: 58 [2020-10-15 00:04:52,189 INFO L226 Difference]: Without dead ends: 35 [2020-10-15 00:04:52,190 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-15 00:04:52,190 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2020-10-15 00:04:52,196 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 30. [2020-10-15 00:04:52,196 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-10-15 00:04:52,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 35 transitions. [2020-10-15 00:04:52,197 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 35 transitions. Word has length 15 [2020-10-15 00:04:52,197 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 00:04:52,197 INFO L479 AbstractCegarLoop]: Abstraction has 30 states and 35 transitions. [2020-10-15 00:04:52,198 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-15 00:04:52,198 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 35 transitions. [2020-10-15 00:04:52,198 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-10-15 00:04:52,199 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 00:04:52,199 INFO L422 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 00:04:52,199 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-15 00:04:52,199 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 00:04:52,200 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 00:04:52,200 INFO L82 PathProgramCache]: Analyzing trace with hash -432373718, now seen corresponding path program 4 times [2020-10-15 00:04:52,200 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 00:04:52,200 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1738557314] [2020-10-15 00:04:52,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 00:04:52,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:04:52,213 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:04:52,312 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:04:52,339 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:04:52,339 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 24 [2020-10-15 00:04:52,339 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-15 00:04:52,339 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 130 [2020-10-15 00:04:52,339 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:04:52,340 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:04:52,340 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-15 00:04:52,340 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-15 00:04:52,340 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 11 [2020-10-15 00:04:52,341 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-15 00:04:56,147 WARN L193 SmtUtils]: Spent 3.71 s on a formula simplification. DAG size of input: 54 DAG size of output: 12 [2020-10-15 00:04:56,189 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 00:04:56,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:04:56,191 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:04:56,192 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:04:56,192 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-15 00:04:56,192 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:04:56,192 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-15 00:04:56,193 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:04:56,193 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:04:56,194 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 00:04:56,194 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 00:04:56,194 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 00:04:56,194 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-15 00:04:56,197 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 00:04:56,197 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1738557314] [2020-10-15 00:04:56,198 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-15 00:04:56,199 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-15 00:04:56,199 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [33088888] [2020-10-15 00:04:56,200 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-15 00:04:56,200 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 00:04:56,200 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-15 00:04:56,201 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2020-10-15 00:04:56,201 INFO L87 Difference]: Start difference. First operand 30 states and 35 transitions. Second operand 9 states. [2020-10-15 00:04:56,322 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 00:04:56,322 INFO L93 Difference]: Finished difference Result 51 states and 65 transitions. [2020-10-15 00:04:56,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-15 00:04:56,323 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 16 [2020-10-15 00:04:56,323 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 00:04:56,324 INFO L225 Difference]: With dead ends: 51 [2020-10-15 00:04:56,324 INFO L226 Difference]: Without dead ends: 49 [2020-10-15 00:04:56,325 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2020-10-15 00:04:56,325 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2020-10-15 00:04:56,331 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 36. [2020-10-15 00:04:56,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-10-15 00:04:56,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 42 transitions. [2020-10-15 00:04:56,332 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 42 transitions. Word has length 16 [2020-10-15 00:04:56,332 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 00:04:56,333 INFO L479 AbstractCegarLoop]: Abstraction has 36 states and 42 transitions. [2020-10-15 00:04:56,333 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-15 00:04:56,333 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 42 transitions. [2020-10-15 00:04:56,333 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-10-15 00:04:56,334 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 00:04:56,334 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 00:04:56,334 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-15 00:04:56,334 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 00:04:56,334 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 00:04:56,335 INFO L82 PathProgramCache]: Analyzing trace with hash 513830110, now seen corresponding path program 1 times [2020-10-15 00:04:56,335 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 00:04:56,335 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2004366752] [2020-10-15 00:04:56,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 00:04:56,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:04:56,344 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:04:56,352 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:04:56,421 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:04:56,422 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 28 [2020-10-15 00:04:56,422 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-15 00:04:56,422 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 79 [2020-10-15 00:04:56,422 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:04:56,422 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:04:56,423 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-15 00:04:56,423 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-15 00:04:56,423 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-15 00:04:56,423 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-15 00:04:56,460 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 00:04:56,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:04:56,462 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:04:56,462 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:04:56,462 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-15 00:04:56,463 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:04:56,463 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-15 00:04:56,463 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:04:56,463 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:04:56,464 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 00:04:56,464 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 00:04:56,464 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 00:04:56,464 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-15 00:04:56,465 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-15 00:04:56,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:04:56,469 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:04:56,475 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:04:56,475 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-15 00:04:56,476 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:04:56,476 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-15 00:04:56,476 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:04:56,476 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:04:56,477 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-15 00:04:56,477 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 00:04:56,477 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-15 00:04:56,477 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:04:56,480 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 00:04:56,480 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2004366752] [2020-10-15 00:04:56,481 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-15 00:04:56,481 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4] total 4 [2020-10-15 00:04:56,481 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1941054173] [2020-10-15 00:04:56,482 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-15 00:04:56,482 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 00:04:56,482 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-15 00:04:56,482 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-10-15 00:04:56,483 INFO L87 Difference]: Start difference. First operand 36 states and 42 transitions. Second operand 4 states. [2020-10-15 00:04:56,515 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 00:04:56,516 INFO L93 Difference]: Finished difference Result 72 states and 94 transitions. [2020-10-15 00:04:56,516 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-15 00:04:56,517 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 18 [2020-10-15 00:04:56,517 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 00:04:56,518 INFO L225 Difference]: With dead ends: 72 [2020-10-15 00:04:56,518 INFO L226 Difference]: Without dead ends: 65 [2020-10-15 00:04:56,519 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-10-15 00:04:56,519 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2020-10-15 00:04:56,528 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 51. [2020-10-15 00:04:56,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-10-15 00:04:56,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 65 transitions. [2020-10-15 00:04:56,529 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 65 transitions. Word has length 18 [2020-10-15 00:04:56,530 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 00:04:56,530 INFO L479 AbstractCegarLoop]: Abstraction has 51 states and 65 transitions. [2020-10-15 00:04:56,530 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-15 00:04:56,530 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 65 transitions. [2020-10-15 00:04:56,531 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-10-15 00:04:56,531 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 00:04:56,531 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 00:04:56,531 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-15 00:04:56,532 INFO L427 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 00:04:56,532 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 00:04:56,532 INFO L82 PathProgramCache]: Analyzing trace with hash -492380809, now seen corresponding path program 5 times [2020-10-15 00:04:56,532 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 00:04:56,532 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2079037801] [2020-10-15 00:04:56,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 00:04:56,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:04:56,543 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:04:56,655 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:04:56,655 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-10-15 00:04:56,655 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:04:56,656 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 115 [2020-10-15 00:04:56,656 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:04:56,656 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:04:56,656 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-15 00:04:56,656 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-15 00:04:56,657 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-15 00:04:56,657 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:04:56,740 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 00:04:56,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:04:56,741 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:04:56,742 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:04:56,742 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-15 00:04:56,743 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:04:56,743 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-15 00:04:56,743 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:04:56,743 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:04:56,743 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 00:04:56,744 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 00:04:56,744 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 00:04:56,744 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-15 00:04:56,745 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 00:04:56,746 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2079037801] [2020-10-15 00:04:56,746 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-15 00:04:56,746 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-15 00:04:56,746 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [226391944] [2020-10-15 00:04:56,747 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-15 00:04:56,747 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 00:04:56,747 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-15 00:04:56,748 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2020-10-15 00:04:56,748 INFO L87 Difference]: Start difference. First operand 51 states and 65 transitions. Second operand 8 states. [2020-10-15 00:04:56,803 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 00:04:56,803 INFO L93 Difference]: Finished difference Result 97 states and 127 transitions. [2020-10-15 00:04:56,804 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-15 00:04:56,804 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 17 [2020-10-15 00:04:56,804 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 00:04:56,806 INFO L225 Difference]: With dead ends: 97 [2020-10-15 00:04:56,806 INFO L226 Difference]: Without dead ends: 54 [2020-10-15 00:04:56,807 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2020-10-15 00:04:56,807 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-10-15 00:04:56,815 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 47. [2020-10-15 00:04:56,815 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2020-10-15 00:04:56,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 58 transitions. [2020-10-15 00:04:56,816 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 58 transitions. Word has length 17 [2020-10-15 00:04:56,817 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 00:04:56,817 INFO L479 AbstractCegarLoop]: Abstraction has 47 states and 58 transitions. [2020-10-15 00:04:56,817 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-15 00:04:56,817 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 58 transitions. [2020-10-15 00:04:56,818 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-10-15 00:04:56,818 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 00:04:56,818 INFO L422 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 00:04:56,818 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-15 00:04:56,818 INFO L427 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 00:04:56,819 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 00:04:56,819 INFO L82 PathProgramCache]: Analyzing trace with hash 1942366666, now seen corresponding path program 6 times [2020-10-15 00:04:56,819 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 00:04:56,819 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1100151420] [2020-10-15 00:04:56,819 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 00:04:56,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:04:56,831 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:04:56,955 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:04:56,955 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 26 [2020-10-15 00:04:56,955 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:04:56,956 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 127 [2020-10-15 00:04:56,956 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:04:56,956 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:04:56,956 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-15 00:04:56,956 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-15 00:04:56,957 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-15 00:04:56,957 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-15 00:04:57,055 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 00:04:57,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:04:57,056 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:04:57,057 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:04:57,057 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-15 00:04:57,057 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:04:57,058 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-15 00:04:57,058 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:04:57,058 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:04:57,059 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 00:04:57,059 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 00:04:57,059 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 00:04:57,059 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-15 00:04:57,061 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 00:04:57,061 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1100151420] [2020-10-15 00:04:57,061 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-15 00:04:57,062 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-15 00:04:57,062 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1279788847] [2020-10-15 00:04:57,062 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-15 00:04:57,063 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 00:04:57,063 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-15 00:04:57,063 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2020-10-15 00:04:57,063 INFO L87 Difference]: Start difference. First operand 47 states and 58 transitions. Second operand 9 states. [2020-10-15 00:04:57,127 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 00:04:57,128 INFO L93 Difference]: Finished difference Result 95 states and 120 transitions. [2020-10-15 00:04:57,128 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-15 00:04:57,128 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 18 [2020-10-15 00:04:57,128 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 00:04:57,129 INFO L225 Difference]: With dead ends: 95 [2020-10-15 00:04:57,129 INFO L226 Difference]: Without dead ends: 56 [2020-10-15 00:04:57,130 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2020-10-15 00:04:57,130 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2020-10-15 00:04:57,137 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 49. [2020-10-15 00:04:57,138 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2020-10-15 00:04:57,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 60 transitions. [2020-10-15 00:04:57,139 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 60 transitions. Word has length 18 [2020-10-15 00:04:57,139 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 00:04:57,139 INFO L479 AbstractCegarLoop]: Abstraction has 49 states and 60 transitions. [2020-10-15 00:04:57,139 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-15 00:04:57,139 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 60 transitions. [2020-10-15 00:04:57,140 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-10-15 00:04:57,140 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 00:04:57,140 INFO L422 BasicCegarLoop]: trace histogram [7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 00:04:57,140 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-15 00:04:57,140 INFO L427 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 00:04:57,141 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 00:04:57,141 INFO L82 PathProgramCache]: Analyzing trace with hash 110127063, now seen corresponding path program 7 times [2020-10-15 00:04:57,141 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 00:04:57,141 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [408583960] [2020-10-15 00:04:57,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 00:04:57,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:04:57,153 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:04:57,299 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:04:57,299 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 27 [2020-10-15 00:04:57,300 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:04:57,300 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 150 [2020-10-15 00:04:57,300 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:04:57,300 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:04:57,300 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-15 00:04:57,301 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-15 00:04:57,301 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 9 [2020-10-15 00:04:57,301 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:04:57,407 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 00:04:57,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:04:57,409 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:04:57,409 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:04:57,410 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-15 00:04:57,410 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:04:57,410 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-15 00:04:57,410 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:04:57,410 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:04:57,411 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 00:04:57,411 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 00:04:57,411 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 00:04:57,411 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:04:57,413 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 00:04:57,413 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [408583960] [2020-10-15 00:04:57,413 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-15 00:04:57,413 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-15 00:04:57,414 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1073880112] [2020-10-15 00:04:57,414 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-15 00:04:57,414 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 00:04:57,414 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-15 00:04:57,415 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2020-10-15 00:04:57,415 INFO L87 Difference]: Start difference. First operand 49 states and 60 transitions. Second operand 10 states. [2020-10-15 00:04:57,487 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 00:04:57,487 INFO L93 Difference]: Finished difference Result 99 states and 124 transitions. [2020-10-15 00:04:57,487 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-15 00:04:57,488 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 19 [2020-10-15 00:04:57,488 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 00:04:57,489 INFO L225 Difference]: With dead ends: 99 [2020-10-15 00:04:57,489 INFO L226 Difference]: Without dead ends: 58 [2020-10-15 00:04:57,490 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2020-10-15 00:04:57,490 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2020-10-15 00:04:57,497 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 51. [2020-10-15 00:04:57,497 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-10-15 00:04:57,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 62 transitions. [2020-10-15 00:04:57,498 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 62 transitions. Word has length 19 [2020-10-15 00:04:57,498 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 00:04:57,498 INFO L479 AbstractCegarLoop]: Abstraction has 51 states and 62 transitions. [2020-10-15 00:04:57,498 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-15 00:04:57,498 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 62 transitions. [2020-10-15 00:04:57,499 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-10-15 00:04:57,499 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 00:04:57,499 INFO L422 BasicCegarLoop]: trace histogram [8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 00:04:57,500 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-15 00:04:57,500 INFO L427 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 00:04:57,500 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 00:04:57,500 INFO L82 PathProgramCache]: Analyzing trace with hash -854725782, now seen corresponding path program 8 times [2020-10-15 00:04:57,500 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 00:04:57,501 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1038655778] [2020-10-15 00:04:57,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 00:04:57,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:04:57,514 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:04:57,705 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:04:57,737 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:04:57,737 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 28 [2020-10-15 00:04:57,737 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-15 00:04:57,737 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 227 [2020-10-15 00:04:57,738 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:04:57,738 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:04:57,738 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-15 00:04:57,738 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-15 00:04:57,739 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 15 [2020-10-15 00:04:57,739 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-15 00:04:58,048 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 00:04:58,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:04:58,050 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:04:58,050 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:04:58,051 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-15 00:04:58,051 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:04:58,051 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-15 00:04:58,051 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:04:58,052 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:04:58,052 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 00:04:58,052 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 00:04:58,052 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 00:04:58,052 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-15 00:04:58,054 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 00:04:58,055 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1038655778] [2020-10-15 00:04:58,055 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-15 00:04:58,055 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-15 00:04:58,055 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2101562071] [2020-10-15 00:04:58,056 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-15 00:04:58,056 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 00:04:58,056 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-15 00:04:58,056 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=133, Unknown=0, NotChecked=0, Total=156 [2020-10-15 00:04:58,056 INFO L87 Difference]: Start difference. First operand 51 states and 62 transitions. Second operand 13 states. [2020-10-15 00:04:58,254 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 00:04:58,254 INFO L93 Difference]: Finished difference Result 81 states and 105 transitions. [2020-10-15 00:04:58,255 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-15 00:04:58,255 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 20 [2020-10-15 00:04:58,255 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 00:04:58,256 INFO L225 Difference]: With dead ends: 81 [2020-10-15 00:04:58,256 INFO L226 Difference]: Without dead ends: 79 [2020-10-15 00:04:58,257 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=27, Invalid=155, Unknown=0, NotChecked=0, Total=182 [2020-10-15 00:04:58,257 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2020-10-15 00:04:58,266 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 59. [2020-10-15 00:04:58,266 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2020-10-15 00:04:58,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 73 transitions. [2020-10-15 00:04:58,267 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 73 transitions. Word has length 20 [2020-10-15 00:04:58,268 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 00:04:58,268 INFO L479 AbstractCegarLoop]: Abstraction has 59 states and 73 transitions. [2020-10-15 00:04:58,268 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-15 00:04:58,268 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 73 transitions. [2020-10-15 00:04:58,269 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-15 00:04:58,269 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 00:04:58,269 INFO L422 BasicCegarLoop]: trace histogram [9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 00:04:58,269 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-15 00:04:58,269 INFO L427 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 00:04:58,269 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 00:04:58,270 INFO L82 PathProgramCache]: Analyzing trace with hash -700392905, now seen corresponding path program 9 times [2020-10-15 00:04:58,270 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 00:04:58,270 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [909598412] [2020-10-15 00:04:58,270 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 00:04:58,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:04:58,283 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:04:58,455 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:04:58,455 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 29 [2020-10-15 00:04:58,456 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:04:58,456 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 177 [2020-10-15 00:04:58,456 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:04:58,456 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:04:58,456 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-15 00:04:58,456 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-15 00:04:58,457 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 11 [2020-10-15 00:04:58,457 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:04:58,618 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 00:04:58,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:04:58,620 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:04:58,620 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:04:58,620 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-15 00:04:58,621 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:04:58,621 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-15 00:04:58,621 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:04:58,621 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:04:58,621 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 00:04:58,622 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 00:04:58,622 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 00:04:58,622 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:04:58,623 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 00:04:58,624 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [909598412] [2020-10-15 00:04:58,624 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-15 00:04:58,624 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-15 00:04:58,624 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1956422092] [2020-10-15 00:04:58,624 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-15 00:04:58,625 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 00:04:58,626 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-15 00:04:58,629 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2020-10-15 00:04:58,629 INFO L87 Difference]: Start difference. First operand 59 states and 73 transitions. Second operand 12 states. [2020-10-15 00:04:58,737 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 00:04:58,738 INFO L93 Difference]: Finished difference Result 113 states and 143 transitions. [2020-10-15 00:04:58,738 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-15 00:04:58,738 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 21 [2020-10-15 00:04:58,739 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 00:04:58,739 INFO L225 Difference]: With dead ends: 113 [2020-10-15 00:04:58,739 INFO L226 Difference]: Without dead ends: 62 [2020-10-15 00:04:58,740 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2020-10-15 00:04:58,741 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2020-10-15 00:04:58,748 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 55. [2020-10-15 00:04:58,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2020-10-15 00:04:58,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 66 transitions. [2020-10-15 00:04:58,749 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 66 transitions. Word has length 21 [2020-10-15 00:04:58,749 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 00:04:58,750 INFO L479 AbstractCegarLoop]: Abstraction has 55 states and 66 transitions. [2020-10-15 00:04:58,750 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-15 00:04:58,750 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 66 transitions. [2020-10-15 00:04:58,750 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-15 00:04:58,751 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 00:04:58,751 INFO L422 BasicCegarLoop]: trace histogram [10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 00:04:58,751 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-15 00:04:58,751 INFO L427 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 00:04:58,751 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 00:04:58,751 INFO L82 PathProgramCache]: Analyzing trace with hash -211041014, now seen corresponding path program 10 times [2020-10-15 00:04:58,752 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 00:04:58,752 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1702143997] [2020-10-15 00:04:58,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 00:04:58,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:04:58,765 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:04:58,984 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:04:58,985 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 30 [2020-10-15 00:04:58,985 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:04:58,986 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 224 [2020-10-15 00:04:58,986 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:04:58,986 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:04:58,987 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-15 00:04:58,987 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-15 00:04:58,987 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-15 00:04:58,988 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-15 00:04:59,208 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 00:04:59,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:04:59,210 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:04:59,210 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:04:59,210 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-15 00:04:59,211 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:04:59,211 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-15 00:04:59,211 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:04:59,212 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:04:59,212 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 00:04:59,212 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 00:04:59,212 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 00:04:59,213 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-15 00:04:59,215 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 00:04:59,215 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1702143997] [2020-10-15 00:04:59,215 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-15 00:04:59,216 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-15 00:04:59,216 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [498239735] [2020-10-15 00:04:59,216 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-15 00:04:59,216 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 00:04:59,217 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-15 00:04:59,217 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2020-10-15 00:04:59,218 INFO L87 Difference]: Start difference. First operand 55 states and 66 transitions. Second operand 13 states. [2020-10-15 00:04:59,368 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 00:04:59,369 INFO L93 Difference]: Finished difference Result 111 states and 136 transitions. [2020-10-15 00:04:59,369 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-15 00:04:59,369 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 22 [2020-10-15 00:04:59,370 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 00:04:59,370 INFO L225 Difference]: With dead ends: 111 [2020-10-15 00:04:59,370 INFO L226 Difference]: Without dead ends: 64 [2020-10-15 00:04:59,371 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2020-10-15 00:04:59,372 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2020-10-15 00:04:59,379 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 57. [2020-10-15 00:04:59,379 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-10-15 00:04:59,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 68 transitions. [2020-10-15 00:04:59,380 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 68 transitions. Word has length 22 [2020-10-15 00:04:59,380 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 00:04:59,380 INFO L479 AbstractCegarLoop]: Abstraction has 57 states and 68 transitions. [2020-10-15 00:04:59,381 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-15 00:04:59,381 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 68 transitions. [2020-10-15 00:04:59,381 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-15 00:04:59,381 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 00:04:59,381 INFO L422 BasicCegarLoop]: trace histogram [11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 00:04:59,382 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-15 00:04:59,382 INFO L427 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 00:04:59,382 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 00:04:59,382 INFO L82 PathProgramCache]: Analyzing trace with hash 2073965719, now seen corresponding path program 11 times [2020-10-15 00:04:59,382 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 00:04:59,383 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [947183118] [2020-10-15 00:04:59,383 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 00:04:59,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:04:59,397 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:04:59,669 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:04:59,669 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 31 [2020-10-15 00:04:59,669 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:04:59,670 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 277 [2020-10-15 00:04:59,670 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:04:59,670 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:04:59,670 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-15 00:04:59,670 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-15 00:04:59,670 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 13 [2020-10-15 00:04:59,671 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:04:59,850 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 00:04:59,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:04:59,851 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:04:59,852 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:04:59,852 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-15 00:04:59,852 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:04:59,852 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-15 00:04:59,852 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:04:59,853 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:04:59,853 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 00:04:59,853 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 00:04:59,853 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 00:04:59,853 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:04:59,855 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 00:04:59,856 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [947183118] [2020-10-15 00:04:59,856 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-15 00:04:59,856 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-15 00:04:59,856 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1762914896] [2020-10-15 00:04:59,857 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-15 00:04:59,857 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 00:04:59,857 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-15 00:04:59,857 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2020-10-15 00:04:59,857 INFO L87 Difference]: Start difference. First operand 57 states and 68 transitions. Second operand 14 states. [2020-10-15 00:04:59,983 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 00:04:59,983 INFO L93 Difference]: Finished difference Result 115 states and 140 transitions. [2020-10-15 00:04:59,984 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-15 00:04:59,985 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 23 [2020-10-15 00:04:59,985 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 00:04:59,986 INFO L225 Difference]: With dead ends: 115 [2020-10-15 00:04:59,986 INFO L226 Difference]: Without dead ends: 66 [2020-10-15 00:04:59,988 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2020-10-15 00:04:59,989 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2020-10-15 00:05:00,000 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 59. [2020-10-15 00:05:00,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2020-10-15 00:05:00,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 70 transitions. [2020-10-15 00:05:00,002 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 70 transitions. Word has length 23 [2020-10-15 00:05:00,002 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 00:05:00,002 INFO L479 AbstractCegarLoop]: Abstraction has 59 states and 70 transitions. [2020-10-15 00:05:00,002 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-15 00:05:00,003 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 70 transitions. [2020-10-15 00:05:00,006 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-15 00:05:00,007 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 00:05:00,007 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 00:05:00,007 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-15 00:05:00,007 INFO L427 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 00:05:00,007 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 00:05:00,008 INFO L82 PathProgramCache]: Analyzing trace with hash -1704555361, now seen corresponding path program 2 times [2020-10-15 00:05:00,008 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 00:05:00,008 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [453335078] [2020-10-15 00:05:00,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 00:05:00,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:05:00,020 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:05:00,027 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:05:00,040 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:05:00,274 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:05:00,555 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:05:00,555 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 38 [2020-10-15 00:05:00,555 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-15 00:05:00,555 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 537 [2020-10-15 00:05:00,556 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:05:00,556 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:05:00,556 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-15 00:05:00,556 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-15 00:05:00,556 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-15 00:05:00,557 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-15 00:05:00,602 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 00:05:00,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:05:00,605 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:05:00,605 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:05:00,606 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-15 00:05:00,606 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:05:00,606 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-15 00:05:00,606 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:05:00,606 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:05:00,606 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 00:05:00,607 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 00:05:00,607 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 00:05:00,607 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:05:00,608 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-15 00:05:00,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:05:00,611 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:05:00,616 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:05:00,616 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-15 00:05:00,617 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:05:00,617 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-15 00:05:00,617 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:05:00,617 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:05:00,617 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-15 00:05:00,617 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 00:05:00,618 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-15 00:05:00,618 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:05:00,620 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-10-15 00:05:00,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:05:00,624 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:05:00,629 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:05:00,629 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-15 00:05:00,629 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:05:00,629 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-15 00:05:00,630 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:05:00,630 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:05:00,630 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-15 00:05:00,630 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 00:05:00,630 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-15 00:05:00,631 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-15 00:05:00,634 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 4 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-15 00:05:00,635 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [453335078] [2020-10-15 00:05:00,637 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-15 00:05:00,637 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-15 00:05:00,637 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1322111104] [2020-10-15 00:05:00,639 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-15 00:05:00,639 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 00:05:00,639 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-15 00:05:00,640 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-15 00:05:00,640 INFO L87 Difference]: Start difference. First operand 59 states and 70 transitions. Second operand 5 states. [2020-10-15 00:05:00,697 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 00:05:00,697 INFO L93 Difference]: Finished difference Result 107 states and 130 transitions. [2020-10-15 00:05:00,698 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-15 00:05:00,698 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 26 [2020-10-15 00:05:00,698 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 00:05:00,699 INFO L225 Difference]: With dead ends: 107 [2020-10-15 00:05:00,699 INFO L226 Difference]: Without dead ends: 100 [2020-10-15 00:05:00,700 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-15 00:05:00,700 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2020-10-15 00:05:00,717 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 80. [2020-10-15 00:05:00,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2020-10-15 00:05:00,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 97 transitions. [2020-10-15 00:05:00,718 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 97 transitions. Word has length 26 [2020-10-15 00:05:00,718 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 00:05:00,718 INFO L479 AbstractCegarLoop]: Abstraction has 80 states and 97 transitions. [2020-10-15 00:05:00,719 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-15 00:05:00,719 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 97 transitions. [2020-10-15 00:05:00,719 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-15 00:05:00,719 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 00:05:00,720 INFO L422 BasicCegarLoop]: trace histogram [12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 00:05:00,720 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-15 00:05:00,720 INFO L427 AbstractCegarLoop]: === Iteration 17 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 00:05:00,721 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 00:05:00,721 INFO L82 PathProgramCache]: Analyzing trace with hash -105269590, now seen corresponding path program 12 times [2020-10-15 00:05:00,721 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 00:05:00,721 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1964996978] [2020-10-15 00:05:00,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 00:05:00,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:05:00,736 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:05:00,870 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:05:01,318 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:05:01,318 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 32 [2020-10-15 00:05:01,318 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-15 00:05:01,318 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 587 [2020-10-15 00:05:01,319 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:05:01,319 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:05:01,319 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-15 00:05:01,319 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-15 00:05:01,319 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 19 [2020-10-15 00:05:01,320 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:05:05,445 WARN L193 SmtUtils]: Spent 3.87 s on a formula simplification. DAG size of input: 55 DAG size of output: 15 [2020-10-15 00:05:05,481 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 00:05:05,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:05:05,483 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:05:05,484 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:05:05,484 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-15 00:05:05,484 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:05:05,484 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-15 00:05:05,484 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:05:05,485 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:05:05,485 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 00:05:05,485 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 00:05:05,485 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 00:05:05,485 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:05:05,487 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 00:05:05,488 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1964996978] [2020-10-15 00:05:05,488 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-15 00:05:05,488 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-15 00:05:05,488 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1429571228] [2020-10-15 00:05:05,489 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 00:05:05,489 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 00:05:05,489 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 00:05:05,489 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=241, Unknown=0, NotChecked=0, Total=272 [2020-10-15 00:05:05,490 INFO L87 Difference]: Start difference. First operand 80 states and 97 transitions. Second operand 17 states. [2020-10-15 00:05:05,766 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 00:05:05,767 INFO L93 Difference]: Finished difference Result 123 states and 161 transitions. [2020-10-15 00:05:05,767 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-15 00:05:05,767 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 24 [2020-10-15 00:05:05,767 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 00:05:05,769 INFO L225 Difference]: With dead ends: 123 [2020-10-15 00:05:05,769 INFO L226 Difference]: Without dead ends: 121 [2020-10-15 00:05:05,771 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=35, Invalid=271, Unknown=0, NotChecked=0, Total=306 [2020-10-15 00:05:05,771 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2020-10-15 00:05:05,783 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 90. [2020-10-15 00:05:05,783 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 90 states. [2020-10-15 00:05:05,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 112 transitions. [2020-10-15 00:05:05,784 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 112 transitions. Word has length 24 [2020-10-15 00:05:05,784 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 00:05:05,785 INFO L479 AbstractCegarLoop]: Abstraction has 90 states and 112 transitions. [2020-10-15 00:05:05,785 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 00:05:05,785 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 112 transitions. [2020-10-15 00:05:05,785 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-15 00:05:05,785 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 00:05:05,786 INFO L422 BasicCegarLoop]: trace histogram [13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 00:05:05,786 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-15 00:05:05,786 INFO L427 AbstractCegarLoop]: === Iteration 18 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 00:05:05,786 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 00:05:05,786 INFO L82 PathProgramCache]: Analyzing trace with hash 1057912567, now seen corresponding path program 13 times [2020-10-15 00:05:05,786 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 00:05:05,787 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [878632643] [2020-10-15 00:05:05,787 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 00:05:05,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:05:05,802 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:05:06,149 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:05:06,150 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 33 [2020-10-15 00:05:06,150 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:05:06,150 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 353 [2020-10-15 00:05:06,150 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:05:06,150 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:05:06,150 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-15 00:05:06,151 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-15 00:05:06,151 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 15 [2020-10-15 00:05:06,151 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:05:06,394 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 00:05:06,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:05:06,395 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:05:06,396 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:05:06,396 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-15 00:05:06,396 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:05:06,396 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-15 00:05:06,396 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:05:06,397 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:05:06,397 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 00:05:06,397 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 00:05:06,397 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 00:05:06,397 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:05:06,399 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 00:05:06,399 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [878632643] [2020-10-15 00:05:06,400 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-15 00:05:06,400 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-15 00:05:06,400 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2015460016] [2020-10-15 00:05:06,402 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-15 00:05:06,403 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 00:05:06,403 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-15 00:05:06,404 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=198, Unknown=0, NotChecked=0, Total=240 [2020-10-15 00:05:06,404 INFO L87 Difference]: Start difference. First operand 90 states and 112 transitions. Second operand 16 states. [2020-10-15 00:05:06,588 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 00:05:06,589 INFO L93 Difference]: Finished difference Result 179 states and 227 transitions. [2020-10-15 00:05:06,589 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-15 00:05:06,589 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 25 [2020-10-15 00:05:06,591 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 00:05:06,593 INFO L225 Difference]: With dead ends: 179 [2020-10-15 00:05:06,593 INFO L226 Difference]: Without dead ends: 97 [2020-10-15 00:05:06,594 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=42, Invalid=198, Unknown=0, NotChecked=0, Total=240 [2020-10-15 00:05:06,594 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2020-10-15 00:05:06,605 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 86. [2020-10-15 00:05:06,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2020-10-15 00:05:06,606 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 103 transitions. [2020-10-15 00:05:06,606 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 103 transitions. Word has length 25 [2020-10-15 00:05:06,606 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 00:05:06,607 INFO L479 AbstractCegarLoop]: Abstraction has 86 states and 103 transitions. [2020-10-15 00:05:06,607 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-15 00:05:06,607 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 103 transitions. [2020-10-15 00:05:06,608 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-15 00:05:06,608 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 00:05:06,609 INFO L422 BasicCegarLoop]: trace histogram [14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 00:05:06,609 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-15 00:05:06,609 INFO L427 AbstractCegarLoop]: === Iteration 19 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 00:05:06,609 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 00:05:06,609 INFO L82 PathProgramCache]: Analyzing trace with hash -1538146230, now seen corresponding path program 14 times [2020-10-15 00:05:06,609 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 00:05:06,610 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [277625049] [2020-10-15 00:05:06,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 00:05:06,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:05:06,626 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:05:06,932 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:05:06,933 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 34 [2020-10-15 00:05:06,933 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:05:06,933 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 312 [2020-10-15 00:05:06,933 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:05:06,934 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:05:06,934 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-15 00:05:06,934 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-15 00:05:06,934 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-15 00:05:06,934 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-15 00:05:07,160 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 00:05:07,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:05:07,161 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:05:07,162 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:05:07,162 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-15 00:05:07,163 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:05:07,163 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-15 00:05:07,163 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:05:07,163 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:05:07,164 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 00:05:07,164 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 00:05:07,164 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 00:05:07,165 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-15 00:05:07,167 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 00:05:07,167 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [277625049] [2020-10-15 00:05:07,167 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-15 00:05:07,168 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-15 00:05:07,168 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [621318649] [2020-10-15 00:05:07,169 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 00:05:07,169 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 00:05:07,170 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 00:05:07,170 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2020-10-15 00:05:07,170 INFO L87 Difference]: Start difference. First operand 86 states and 103 transitions. Second operand 17 states. [2020-10-15 00:05:07,366 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 00:05:07,367 INFO L93 Difference]: Finished difference Result 178 states and 218 transitions. [2020-10-15 00:05:07,367 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-15 00:05:07,367 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 26 [2020-10-15 00:05:07,368 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 00:05:07,369 INFO L225 Difference]: With dead ends: 178 [2020-10-15 00:05:07,369 INFO L226 Difference]: Without dead ends: 100 [2020-10-15 00:05:07,370 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2020-10-15 00:05:07,371 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2020-10-15 00:05:07,381 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 89. [2020-10-15 00:05:07,382 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2020-10-15 00:05:07,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 106 transitions. [2020-10-15 00:05:07,383 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 106 transitions. Word has length 26 [2020-10-15 00:05:07,383 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 00:05:07,383 INFO L479 AbstractCegarLoop]: Abstraction has 89 states and 106 transitions. [2020-10-15 00:05:07,383 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 00:05:07,383 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 106 transitions. [2020-10-15 00:05:07,384 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-15 00:05:07,384 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 00:05:07,384 INFO L422 BasicCegarLoop]: trace histogram [15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 00:05:07,385 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-15 00:05:07,385 INFO L427 AbstractCegarLoop]: === Iteration 20 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 00:05:07,385 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 00:05:07,385 INFO L82 PathProgramCache]: Analyzing trace with hash -411590313, now seen corresponding path program 15 times [2020-10-15 00:05:07,386 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 00:05:07,386 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [395847807] [2020-10-15 00:05:07,386 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 00:05:07,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:05:07,411 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:05:07,771 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:05:07,772 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 35 [2020-10-15 00:05:07,772 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:05:07,772 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 366 [2020-10-15 00:05:07,772 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:05:07,772 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:05:07,773 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-15 00:05:07,773 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-15 00:05:07,773 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-10-15 00:05:07,773 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:05:08,030 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 00:05:08,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:05:08,032 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:05:08,033 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:05:08,034 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-15 00:05:08,034 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:05:08,035 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-15 00:05:08,035 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:05:08,035 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:05:08,036 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 00:05:08,036 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 00:05:08,037 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 00:05:08,037 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-15 00:05:08,041 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 00:05:08,042 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [395847807] [2020-10-15 00:05:08,042 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-15 00:05:08,042 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-15 00:05:08,042 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [453349124] [2020-10-15 00:05:08,043 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-15 00:05:08,043 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 00:05:08,043 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-15 00:05:08,044 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2020-10-15 00:05:08,044 INFO L87 Difference]: Start difference. First operand 89 states and 106 transitions. Second operand 18 states. [2020-10-15 00:05:08,263 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 00:05:08,264 INFO L93 Difference]: Finished difference Result 184 states and 224 transitions. [2020-10-15 00:05:08,264 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-15 00:05:08,264 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 27 [2020-10-15 00:05:08,264 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 00:05:08,265 INFO L225 Difference]: With dead ends: 184 [2020-10-15 00:05:08,265 INFO L226 Difference]: Without dead ends: 103 [2020-10-15 00:05:08,266 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2020-10-15 00:05:08,266 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2020-10-15 00:05:08,277 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 92. [2020-10-15 00:05:08,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2020-10-15 00:05:08,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 109 transitions. [2020-10-15 00:05:08,279 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 109 transitions. Word has length 27 [2020-10-15 00:05:08,279 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 00:05:08,279 INFO L479 AbstractCegarLoop]: Abstraction has 92 states and 109 transitions. [2020-10-15 00:05:08,279 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-15 00:05:08,280 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 109 transitions. [2020-10-15 00:05:08,280 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-15 00:05:08,280 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 00:05:08,280 INFO L422 BasicCegarLoop]: trace histogram [16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 00:05:08,280 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-10-15 00:05:08,281 INFO L427 AbstractCegarLoop]: === Iteration 21 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 00:05:08,281 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 00:05:08,281 INFO L82 PathProgramCache]: Analyzing trace with hash 151904746, now seen corresponding path program 16 times [2020-10-15 00:05:08,281 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 00:05:08,282 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [834580699] [2020-10-15 00:05:08,282 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 00:05:08,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:05:08,299 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:05:08,731 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:05:08,958 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:05:08,959 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 36 [2020-10-15 00:05:08,959 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-15 00:05:08,959 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 665 [2020-10-15 00:05:08,959 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:05:08,959 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:05:08,960 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-10-15 00:05:08,960 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-15 00:05:08,960 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-10-15 00:05:08,960 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:05:11,107 WARN L193 SmtUtils]: Spent 1.76 s on a formula simplification. DAG size of input: 56 DAG size of output: 18 [2020-10-15 00:05:11,159 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 00:05:11,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:05:11,161 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:05:11,162 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:05:11,162 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-15 00:05:11,162 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:05:11,163 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-15 00:05:11,163 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:05:11,163 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:05:11,163 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 00:05:11,164 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 00:05:11,164 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 00:05:11,164 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:05:11,167 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 0 proven. 136 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 00:05:11,167 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [834580699] [2020-10-15 00:05:11,167 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-15 00:05:11,167 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-10-15 00:05:11,167 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1494269127] [2020-10-15 00:05:11,169 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-15 00:05:11,169 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 00:05:11,169 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-15 00:05:11,170 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=381, Unknown=0, NotChecked=0, Total=420 [2020-10-15 00:05:11,170 INFO L87 Difference]: Start difference. First operand 92 states and 109 transitions. Second operand 21 states. [2020-10-15 00:05:11,610 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 00:05:11,610 INFO L93 Difference]: Finished difference Result 135 states and 173 transitions. [2020-10-15 00:05:11,611 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-15 00:05:11,612 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 28 [2020-10-15 00:05:11,612 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 00:05:11,613 INFO L225 Difference]: With dead ends: 135 [2020-10-15 00:05:11,615 INFO L226 Difference]: Without dead ends: 133 [2020-10-15 00:05:11,615 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=43, Invalid=419, Unknown=0, NotChecked=0, Total=462 [2020-10-15 00:05:11,616 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2020-10-15 00:05:11,634 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 102. [2020-10-15 00:05:11,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 102 states. [2020-10-15 00:05:11,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 124 transitions. [2020-10-15 00:05:11,636 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 124 transitions. Word has length 28 [2020-10-15 00:05:11,637 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 00:05:11,637 INFO L479 AbstractCegarLoop]: Abstraction has 102 states and 124 transitions. [2020-10-15 00:05:11,637 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-15 00:05:11,637 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 124 transitions. [2020-10-15 00:05:11,638 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-10-15 00:05:11,638 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 00:05:11,638 INFO L422 BasicCegarLoop]: trace histogram [17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 00:05:11,638 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-10-15 00:05:11,638 INFO L427 AbstractCegarLoop]: === Iteration 22 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 00:05:11,639 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 00:05:11,639 INFO L82 PathProgramCache]: Analyzing trace with hash 440382391, now seen corresponding path program 17 times [2020-10-15 00:05:11,639 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 00:05:11,644 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1729816099] [2020-10-15 00:05:11,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 00:05:11,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:05:11,670 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:05:12,126 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:05:12,127 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 37 [2020-10-15 00:05:12,127 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:05:12,127 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 462 [2020-10-15 00:05:12,127 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:05:12,128 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:05:12,128 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 19 [2020-10-15 00:05:12,128 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-15 00:05:12,128 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 19 [2020-10-15 00:05:12,128 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:05:12,558 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 00:05:12,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:05:12,559 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:05:12,560 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:05:12,562 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-15 00:05:12,562 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:05:12,563 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-15 00:05:12,563 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:05:12,563 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:05:12,563 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 00:05:12,564 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 00:05:12,564 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 00:05:12,564 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-15 00:05:12,567 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 0 proven. 153 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 00:05:12,567 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1729816099] [2020-10-15 00:05:12,567 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-15 00:05:12,567 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-10-15 00:05:12,568 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1570193950] [2020-10-15 00:05:12,569 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-15 00:05:12,570 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 00:05:12,571 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-15 00:05:12,572 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=326, Unknown=0, NotChecked=0, Total=380 [2020-10-15 00:05:12,572 INFO L87 Difference]: Start difference. First operand 102 states and 124 transitions. Second operand 20 states. [2020-10-15 00:05:12,820 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 00:05:12,822 INFO L93 Difference]: Finished difference Result 203 states and 251 transitions. [2020-10-15 00:05:12,822 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-15 00:05:12,822 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 29 [2020-10-15 00:05:12,822 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 00:05:12,824 INFO L225 Difference]: With dead ends: 203 [2020-10-15 00:05:12,824 INFO L226 Difference]: Without dead ends: 109 [2020-10-15 00:05:12,825 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=54, Invalid=326, Unknown=0, NotChecked=0, Total=380 [2020-10-15 00:05:12,826 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2020-10-15 00:05:12,847 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 98. [2020-10-15 00:05:12,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2020-10-15 00:05:12,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 115 transitions. [2020-10-15 00:05:12,848 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 115 transitions. Word has length 29 [2020-10-15 00:05:12,848 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 00:05:12,849 INFO L479 AbstractCegarLoop]: Abstraction has 98 states and 115 transitions. [2020-10-15 00:05:12,849 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-15 00:05:12,849 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 115 transitions. [2020-10-15 00:05:12,849 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-10-15 00:05:12,849 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 00:05:12,850 INFO L422 BasicCegarLoop]: trace histogram [18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 00:05:12,850 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-10-15 00:05:12,850 INFO L427 AbstractCegarLoop]: === Iteration 23 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 00:05:12,850 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 00:05:12,850 INFO L82 PathProgramCache]: Analyzing trace with hash 793254794, now seen corresponding path program 18 times [2020-10-15 00:05:12,850 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 00:05:12,853 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [496274795] [2020-10-15 00:05:12,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 00:05:12,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:05:12,874 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:05:13,279 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:05:13,279 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 38 [2020-10-15 00:05:13,279 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:05:13,280 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 409 [2020-10-15 00:05:13,280 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:05:13,280 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:05:13,280 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-10-15 00:05:13,280 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-15 00:05:13,280 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-15 00:05:13,281 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:05:13,639 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 00:05:13,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:05:13,640 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:05:13,641 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:05:13,641 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-15 00:05:13,641 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:05:13,642 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-15 00:05:13,642 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:05:13,642 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:05:13,642 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 00:05:13,643 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 00:05:13,643 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 00:05:13,643 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-15 00:05:13,645 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 0 proven. 171 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 00:05:13,645 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [496274795] [2020-10-15 00:05:13,646 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-15 00:05:13,646 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-10-15 00:05:13,646 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1049528292] [2020-10-15 00:05:13,646 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-15 00:05:13,646 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 00:05:13,647 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-15 00:05:13,647 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=363, Unknown=0, NotChecked=0, Total=420 [2020-10-15 00:05:13,647 INFO L87 Difference]: Start difference. First operand 98 states and 115 transitions. Second operand 21 states. [2020-10-15 00:05:13,951 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 00:05:13,952 INFO L93 Difference]: Finished difference Result 202 states and 242 transitions. [2020-10-15 00:05:13,952 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-15 00:05:13,952 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 30 [2020-10-15 00:05:13,952 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 00:05:13,953 INFO L225 Difference]: With dead ends: 202 [2020-10-15 00:05:13,953 INFO L226 Difference]: Without dead ends: 112 [2020-10-15 00:05:13,955 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=57, Invalid=363, Unknown=0, NotChecked=0, Total=420 [2020-10-15 00:05:13,956 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2020-10-15 00:05:13,968 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 101. [2020-10-15 00:05:13,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2020-10-15 00:05:13,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 118 transitions. [2020-10-15 00:05:13,969 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 118 transitions. Word has length 30 [2020-10-15 00:05:13,969 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 00:05:13,969 INFO L479 AbstractCegarLoop]: Abstraction has 101 states and 118 transitions. [2020-10-15 00:05:13,970 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-15 00:05:13,970 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 118 transitions. [2020-10-15 00:05:13,970 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-10-15 00:05:13,970 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 00:05:13,970 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 00:05:13,970 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-10-15 00:05:13,971 INFO L427 AbstractCegarLoop]: === Iteration 24 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 00:05:13,971 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 00:05:13,971 INFO L82 PathProgramCache]: Analyzing trace with hash 20274016, now seen corresponding path program 3 times [2020-10-15 00:05:13,971 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 00:05:13,971 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1206050279] [2020-10-15 00:05:13,971 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 00:05:13,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:05:13,977 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:05:13,982 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:05:13,990 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:05:14,052 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:05:14,702 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:05:14,702 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 48 [2020-10-15 00:05:14,702 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-15 00:05:14,703 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 726 [2020-10-15 00:05:14,703 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:05:14,703 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:05:14,704 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-15 00:05:14,704 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-15 00:05:14,704 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-15 00:05:14,704 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-15 00:05:14,787 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 00:05:14,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:05:14,789 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:05:14,790 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:05:14,790 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-15 00:05:14,790 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:05:14,790 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-15 00:05:14,790 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:05:14,791 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:05:14,791 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 00:05:14,791 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 00:05:14,791 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 00:05:14,791 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:05:14,792 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-15 00:05:14,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:05:14,795 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:05:14,800 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:05:14,800 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-15 00:05:14,801 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:05:14,801 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-15 00:05:14,801 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:05:14,802 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:05:14,802 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-15 00:05:14,802 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 00:05:14,802 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-15 00:05:14,803 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-15 00:05:14,804 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-10-15 00:05:14,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:05:14,807 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:05:14,811 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:05:14,811 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-15 00:05:14,812 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:05:14,812 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-15 00:05:14,812 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:05:14,813 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:05:14,813 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-15 00:05:14,813 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 00:05:14,814 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-15 00:05:14,814 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-15 00:05:14,816 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-10-15 00:05:14,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:05:14,820 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:05:14,824 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:05:14,825 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-15 00:05:14,825 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:05:14,825 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-15 00:05:14,826 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:05:14,826 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:05:14,826 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-15 00:05:14,827 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 00:05:14,827 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-15 00:05:14,827 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-15 00:05:14,832 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 6 proven. 15 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-10-15 00:05:14,832 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1206050279] [2020-10-15 00:05:14,833 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-15 00:05:14,833 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-15 00:05:14,833 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1990606470] [2020-10-15 00:05:14,834 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-15 00:05:14,834 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 00:05:14,834 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-15 00:05:14,834 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-15 00:05:14,835 INFO L87 Difference]: Start difference. First operand 101 states and 118 transitions. Second operand 6 states. [2020-10-15 00:05:14,949 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 00:05:14,950 INFO L93 Difference]: Finished difference Result 163 states and 192 transitions. [2020-10-15 00:05:14,950 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-15 00:05:14,951 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 34 [2020-10-15 00:05:14,951 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 00:05:14,952 INFO L225 Difference]: With dead ends: 163 [2020-10-15 00:05:14,953 INFO L226 Difference]: Without dead ends: 156 [2020-10-15 00:05:14,953 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-15 00:05:14,954 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156 states. [2020-10-15 00:05:14,976 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156 to 129. [2020-10-15 00:05:14,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 129 states. [2020-10-15 00:05:14,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 152 transitions. [2020-10-15 00:05:14,978 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 152 transitions. Word has length 34 [2020-10-15 00:05:14,978 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 00:05:14,978 INFO L479 AbstractCegarLoop]: Abstraction has 129 states and 152 transitions. [2020-10-15 00:05:14,978 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-15 00:05:14,978 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 152 transitions. [2020-10-15 00:05:14,979 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-10-15 00:05:14,979 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 00:05:14,980 INFO L422 BasicCegarLoop]: trace histogram [19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 00:05:14,980 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-10-15 00:05:14,980 INFO L427 AbstractCegarLoop]: === Iteration 25 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 00:05:14,980 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 00:05:14,981 INFO L82 PathProgramCache]: Analyzing trace with hash -1152602601, now seen corresponding path program 19 times [2020-10-15 00:05:14,981 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 00:05:14,981 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1340515402] [2020-10-15 00:05:14,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 00:05:14,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:05:15,001 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:05:15,642 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:05:15,642 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 39 [2020-10-15 00:05:15,642 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:05:15,643 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 649 [2020-10-15 00:05:15,643 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:05:15,643 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:05:15,643 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 21 [2020-10-15 00:05:15,643 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-15 00:05:15,643 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 21 [2020-10-15 00:05:15,644 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:05:16,020 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 00:05:16,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:05:16,021 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:05:16,022 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:05:16,022 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-15 00:05:16,022 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:05:16,022 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-15 00:05:16,022 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:05:16,023 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:05:16,023 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 00:05:16,023 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 00:05:16,023 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 00:05:16,023 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:05:16,026 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 0 proven. 190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 00:05:16,026 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1340515402] [2020-10-15 00:05:16,026 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-15 00:05:16,026 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-10-15 00:05:16,027 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [537929041] [2020-10-15 00:05:16,027 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-15 00:05:16,027 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 00:05:16,027 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-15 00:05:16,028 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=402, Unknown=0, NotChecked=0, Total=462 [2020-10-15 00:05:16,028 INFO L87 Difference]: Start difference. First operand 129 states and 152 transitions. Second operand 22 states. [2020-10-15 00:05:16,357 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 00:05:16,357 INFO L93 Difference]: Finished difference Result 269 states and 324 transitions. [2020-10-15 00:05:16,358 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-15 00:05:16,358 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 31 [2020-10-15 00:05:16,358 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 00:05:16,359 INFO L225 Difference]: With dead ends: 269 [2020-10-15 00:05:16,359 INFO L226 Difference]: Without dead ends: 148 [2020-10-15 00:05:16,360 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=60, Invalid=402, Unknown=0, NotChecked=0, Total=462 [2020-10-15 00:05:16,361 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2020-10-15 00:05:16,375 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 133. [2020-10-15 00:05:16,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 133 states. [2020-10-15 00:05:16,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 156 transitions. [2020-10-15 00:05:16,377 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 156 transitions. Word has length 31 [2020-10-15 00:05:16,377 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 00:05:16,377 INFO L479 AbstractCegarLoop]: Abstraction has 133 states and 156 transitions. [2020-10-15 00:05:16,377 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-15 00:05:16,378 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 156 transitions. [2020-10-15 00:05:16,378 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-10-15 00:05:16,378 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 00:05:16,378 INFO L422 BasicCegarLoop]: trace histogram [20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 00:05:16,378 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-10-15 00:05:16,379 INFO L427 AbstractCegarLoop]: === Iteration 26 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 00:05:16,379 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 00:05:16,379 INFO L82 PathProgramCache]: Analyzing trace with hash -1344639702, now seen corresponding path program 20 times [2020-10-15 00:05:16,379 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 00:05:16,379 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1839309449] [2020-10-15 00:05:16,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 00:05:16,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:05:16,394 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:05:16,862 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:05:17,287 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:05:17,287 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 40 [2020-10-15 00:05:17,287 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-15 00:05:17,288 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 899 [2020-10-15 00:05:17,288 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:05:17,288 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:05:17,289 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 22 [2020-10-15 00:05:17,289 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-15 00:05:17,289 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-15 00:05:17,290 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-15 00:05:17,728 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 00:05:17,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:05:17,730 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:05:17,730 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:05:17,731 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-15 00:05:17,731 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:05:17,731 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-15 00:05:17,731 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:05:17,731 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:05:17,731 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 00:05:17,732 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 00:05:17,732 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 00:05:17,732 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:05:17,734 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 00:05:17,734 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1839309449] [2020-10-15 00:05:17,735 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-15 00:05:17,735 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-10-15 00:05:17,735 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [67229170] [2020-10-15 00:05:17,735 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-15 00:05:17,735 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 00:05:17,736 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-15 00:05:17,736 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=443, Unknown=0, NotChecked=0, Total=506 [2020-10-15 00:05:17,736 INFO L87 Difference]: Start difference. First operand 133 states and 156 transitions. Second operand 23 states. [2020-10-15 00:05:18,126 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 00:05:18,126 INFO L93 Difference]: Finished difference Result 277 states and 332 transitions. [2020-10-15 00:05:18,127 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-15 00:05:18,127 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 32 [2020-10-15 00:05:18,127 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 00:05:18,130 INFO L225 Difference]: With dead ends: 277 [2020-10-15 00:05:18,130 INFO L226 Difference]: Without dead ends: 152 [2020-10-15 00:05:18,131 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=63, Invalid=443, Unknown=0, NotChecked=0, Total=506 [2020-10-15 00:05:18,132 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2020-10-15 00:05:18,148 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 137. [2020-10-15 00:05:18,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 137 states. [2020-10-15 00:05:18,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 160 transitions. [2020-10-15 00:05:18,149 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 160 transitions. Word has length 32 [2020-10-15 00:05:18,149 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 00:05:18,149 INFO L479 AbstractCegarLoop]: Abstraction has 137 states and 160 transitions. [2020-10-15 00:05:18,149 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-15 00:05:18,150 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 160 transitions. [2020-10-15 00:05:18,150 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-10-15 00:05:18,150 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 00:05:18,150 INFO L422 BasicCegarLoop]: trace histogram [21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 00:05:18,151 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-10-15 00:05:18,151 INFO L427 AbstractCegarLoop]: === Iteration 27 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 00:05:18,151 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 00:05:18,151 INFO L82 PathProgramCache]: Analyzing trace with hash 1292144759, now seen corresponding path program 21 times [2020-10-15 00:05:18,151 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 00:05:18,151 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1320106946] [2020-10-15 00:05:18,151 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 00:05:18,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:05:18,169 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:05:18,756 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:05:18,757 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 41 [2020-10-15 00:05:18,757 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:05:18,757 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 594 [2020-10-15 00:05:18,757 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:05:18,758 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:05:18,758 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 23 [2020-10-15 00:05:18,758 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-15 00:05:18,758 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-10-15 00:05:18,758 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:05:19,207 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 00:05:19,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:05:19,209 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:05:19,210 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:05:19,210 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-15 00:05:19,210 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:05:19,210 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-15 00:05:19,211 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:05:19,211 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:05:19,212 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 00:05:19,212 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 00:05:19,212 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 00:05:19,212 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-15 00:05:19,215 INFO L134 CoverageAnalysis]: Checked inductivity of 231 backedges. 0 proven. 231 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 00:05:19,215 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1320106946] [2020-10-15 00:05:19,215 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-15 00:05:19,215 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2020-10-15 00:05:19,215 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [23992841] [2020-10-15 00:05:19,216 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-15 00:05:19,216 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 00:05:19,216 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-15 00:05:19,216 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=486, Unknown=0, NotChecked=0, Total=552 [2020-10-15 00:05:19,217 INFO L87 Difference]: Start difference. First operand 137 states and 160 transitions. Second operand 24 states. [2020-10-15 00:05:19,590 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 00:05:19,590 INFO L93 Difference]: Finished difference Result 285 states and 340 transitions. [2020-10-15 00:05:19,591 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-15 00:05:19,591 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 33 [2020-10-15 00:05:19,591 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 00:05:19,592 INFO L225 Difference]: With dead ends: 285 [2020-10-15 00:05:19,592 INFO L226 Difference]: Without dead ends: 156 [2020-10-15 00:05:19,593 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=66, Invalid=486, Unknown=0, NotChecked=0, Total=552 [2020-10-15 00:05:19,594 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156 states. [2020-10-15 00:05:19,608 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156 to 141. [2020-10-15 00:05:19,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 141 states. [2020-10-15 00:05:19,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 164 transitions. [2020-10-15 00:05:19,610 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 164 transitions. Word has length 33 [2020-10-15 00:05:19,610 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 00:05:19,610 INFO L479 AbstractCegarLoop]: Abstraction has 141 states and 164 transitions. [2020-10-15 00:05:19,610 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-15 00:05:19,610 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 164 transitions. [2020-10-15 00:05:19,611 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-10-15 00:05:19,611 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 00:05:19,611 INFO L422 BasicCegarLoop]: trace histogram [22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 00:05:19,611 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-10-15 00:05:19,611 INFO L427 AbstractCegarLoop]: === Iteration 28 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 00:05:19,612 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 00:05:19,612 INFO L82 PathProgramCache]: Analyzing trace with hash 1428084426, now seen corresponding path program 22 times [2020-10-15 00:05:19,612 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 00:05:19,612 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1767195611] [2020-10-15 00:05:19,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 00:05:19,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:05:19,630 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:05:20,581 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:05:20,581 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 42 [2020-10-15 00:05:20,581 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:05:20,582 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 958 [2020-10-15 00:05:20,582 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:05:20,582 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:05:20,582 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 24 [2020-10-15 00:05:20,582 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-15 00:05:20,582 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-10-15 00:05:20,583 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:05:21,098 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 00:05:21,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:05:21,099 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:05:21,100 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:05:21,100 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-15 00:05:21,100 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:05:21,100 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-15 00:05:21,100 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:05:21,100 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:05:21,101 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 00:05:21,101 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 00:05:21,101 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 00:05:21,101 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-15 00:05:21,104 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 00:05:21,104 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1767195611] [2020-10-15 00:05:21,104 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-15 00:05:21,104 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2020-10-15 00:05:21,105 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1999011182] [2020-10-15 00:05:21,105 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-15 00:05:21,105 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 00:05:21,105 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-15 00:05:21,106 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=531, Unknown=0, NotChecked=0, Total=600 [2020-10-15 00:05:21,106 INFO L87 Difference]: Start difference. First operand 141 states and 164 transitions. Second operand 25 states. [2020-10-15 00:05:21,530 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 00:05:21,530 INFO L93 Difference]: Finished difference Result 293 states and 348 transitions. [2020-10-15 00:05:21,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-15 00:05:21,531 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 34 [2020-10-15 00:05:21,531 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 00:05:21,532 INFO L225 Difference]: With dead ends: 293 [2020-10-15 00:05:21,533 INFO L226 Difference]: Without dead ends: 160 [2020-10-15 00:05:21,539 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=69, Invalid=531, Unknown=0, NotChecked=0, Total=600 [2020-10-15 00:05:21,539 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2020-10-15 00:05:21,558 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 145. [2020-10-15 00:05:21,558 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 145 states. [2020-10-15 00:05:21,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 168 transitions. [2020-10-15 00:05:21,563 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 168 transitions. Word has length 34 [2020-10-15 00:05:21,564 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 00:05:21,564 INFO L479 AbstractCegarLoop]: Abstraction has 145 states and 168 transitions. [2020-10-15 00:05:21,564 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-15 00:05:21,564 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 168 transitions. [2020-10-15 00:05:21,564 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-10-15 00:05:21,565 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 00:05:21,565 INFO L422 BasicCegarLoop]: trace histogram [23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 00:05:21,565 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2020-10-15 00:05:21,565 INFO L427 AbstractCegarLoop]: === Iteration 29 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 00:05:21,565 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 00:05:21,565 INFO L82 PathProgramCache]: Analyzing trace with hash 1347246807, now seen corresponding path program 23 times [2020-10-15 00:05:21,566 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 00:05:21,566 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2058117752] [2020-10-15 00:05:21,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 00:05:21,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:05:21,593 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:05:22,339 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:05:22,339 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 43 [2020-10-15 00:05:22,340 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:05:22,340 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 757 [2020-10-15 00:05:22,340 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:05:22,340 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:05:22,340 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 25 [2020-10-15 00:05:22,341 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-15 00:05:22,341 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 25 [2020-10-15 00:05:22,341 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:05:22,899 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 00:05:22,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:05:22,901 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:05:22,902 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:05:22,902 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-15 00:05:22,902 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:05:22,902 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-15 00:05:22,903 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:05:22,903 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:05:22,903 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 00:05:22,903 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 00:05:22,903 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 00:05:22,903 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:05:22,907 INFO L134 CoverageAnalysis]: Checked inductivity of 276 backedges. 0 proven. 276 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 00:05:22,907 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2058117752] [2020-10-15 00:05:22,908 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-15 00:05:22,908 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2020-10-15 00:05:22,908 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2023488923] [2020-10-15 00:05:22,908 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-10-15 00:05:22,908 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 00:05:22,908 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-10-15 00:05:22,909 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=578, Unknown=0, NotChecked=0, Total=650 [2020-10-15 00:05:22,909 INFO L87 Difference]: Start difference. First operand 145 states and 168 transitions. Second operand 26 states. [2020-10-15 00:05:23,471 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 00:05:23,472 INFO L93 Difference]: Finished difference Result 301 states and 356 transitions. [2020-10-15 00:05:23,472 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-15 00:05:23,472 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 35 [2020-10-15 00:05:23,472 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 00:05:23,474 INFO L225 Difference]: With dead ends: 301 [2020-10-15 00:05:23,474 INFO L226 Difference]: Without dead ends: 164 [2020-10-15 00:05:23,475 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=72, Invalid=578, Unknown=0, NotChecked=0, Total=650 [2020-10-15 00:05:23,475 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164 states. [2020-10-15 00:05:23,495 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164 to 149. [2020-10-15 00:05:23,495 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 149 states. [2020-10-15 00:05:23,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 172 transitions. [2020-10-15 00:05:23,497 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 172 transitions. Word has length 35 [2020-10-15 00:05:23,497 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 00:05:23,498 INFO L479 AbstractCegarLoop]: Abstraction has 149 states and 172 transitions. [2020-10-15 00:05:23,498 INFO L480 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-10-15 00:05:23,498 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 172 transitions. [2020-10-15 00:05:23,499 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-10-15 00:05:23,499 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 00:05:23,499 INFO L422 BasicCegarLoop]: trace histogram [24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 00:05:23,499 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2020-10-15 00:05:23,500 INFO L427 AbstractCegarLoop]: === Iteration 30 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 00:05:23,500 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 00:05:23,500 INFO L82 PathProgramCache]: Analyzing trace with hash -1158719382, now seen corresponding path program 24 times [2020-10-15 00:05:23,500 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 00:05:23,501 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [148358901] [2020-10-15 00:05:23,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 00:05:23,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:05:23,523 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:05:24,721 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:05:25,356 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:05:25,356 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 44 [2020-10-15 00:05:25,356 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-15 00:05:25,356 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1842 [2020-10-15 00:05:25,356 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:05:25,356 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:05:25,357 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 26 [2020-10-15 00:05:25,357 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-15 00:05:25,357 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-15 00:05:25,357 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:05:25,958 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 00:05:25,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:05:25,960 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:05:25,961 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:05:25,961 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-15 00:05:25,961 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:05:25,961 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-15 00:05:25,962 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:05:25,962 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:05:25,962 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 00:05:25,962 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 00:05:25,962 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 00:05:25,962 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:05:25,965 INFO L134 CoverageAnalysis]: Checked inductivity of 300 backedges. 0 proven. 300 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 00:05:25,965 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [148358901] [2020-10-15 00:05:25,965 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-15 00:05:25,965 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2020-10-15 00:05:25,965 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1847679578] [2020-10-15 00:05:25,966 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-10-15 00:05:25,966 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 00:05:25,966 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-10-15 00:05:25,966 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=627, Unknown=0, NotChecked=0, Total=702 [2020-10-15 00:05:25,967 INFO L87 Difference]: Start difference. First operand 149 states and 172 transitions. Second operand 27 states. [2020-10-15 00:05:26,479 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 00:05:26,479 INFO L93 Difference]: Finished difference Result 309 states and 364 transitions. [2020-10-15 00:05:26,480 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-15 00:05:26,480 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 36 [2020-10-15 00:05:26,480 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 00:05:26,484 INFO L225 Difference]: With dead ends: 309 [2020-10-15 00:05:26,484 INFO L226 Difference]: Without dead ends: 168 [2020-10-15 00:05:26,486 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=75, Invalid=627, Unknown=0, NotChecked=0, Total=702 [2020-10-15 00:05:26,486 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168 states. [2020-10-15 00:05:26,503 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168 to 153. [2020-10-15 00:05:26,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 153 states. [2020-10-15 00:05:26,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 176 transitions. [2020-10-15 00:05:26,504 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 176 transitions. Word has length 36 [2020-10-15 00:05:26,504 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 00:05:26,505 INFO L479 AbstractCegarLoop]: Abstraction has 153 states and 176 transitions. [2020-10-15 00:05:26,505 INFO L480 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-10-15 00:05:26,505 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 176 transitions. [2020-10-15 00:05:26,505 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-10-15 00:05:26,505 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 00:05:26,506 INFO L422 BasicCegarLoop]: trace histogram [25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 00:05:26,506 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2020-10-15 00:05:26,506 INFO L427 AbstractCegarLoop]: === Iteration 31 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 00:05:26,506 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 00:05:26,506 INFO L82 PathProgramCache]: Analyzing trace with hash -1534259913, now seen corresponding path program 25 times [2020-10-15 00:05:26,506 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 00:05:26,507 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [971773056] [2020-10-15 00:05:26,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 00:05:26,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:05:26,524 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:05:27,445 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:05:27,445 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 45 [2020-10-15 00:05:27,445 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:05:27,445 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 928 [2020-10-15 00:05:27,446 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:05:27,446 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:05:27,446 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 27 [2020-10-15 00:05:27,446 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-15 00:05:27,446 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 27 [2020-10-15 00:05:27,447 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-15 00:05:28,068 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 00:05:28,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:05:28,069 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:05:28,070 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:05:28,070 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-15 00:05:28,070 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:05:28,070 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-15 00:05:28,070 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:05:28,070 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:05:28,070 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 00:05:28,070 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 00:05:28,071 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 00:05:28,071 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:05:28,074 INFO L134 CoverageAnalysis]: Checked inductivity of 325 backedges. 0 proven. 325 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 00:05:28,074 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [971773056] [2020-10-15 00:05:28,074 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-15 00:05:28,074 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2020-10-15 00:05:28,075 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1507026307] [2020-10-15 00:05:28,075 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-10-15 00:05:28,075 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 00:05:28,075 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-10-15 00:05:28,076 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=678, Unknown=0, NotChecked=0, Total=756 [2020-10-15 00:05:28,076 INFO L87 Difference]: Start difference. First operand 153 states and 176 transitions. Second operand 28 states. [2020-10-15 00:05:28,590 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 00:05:28,591 INFO L93 Difference]: Finished difference Result 317 states and 372 transitions. [2020-10-15 00:05:28,591 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-15 00:05:28,591 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 37 [2020-10-15 00:05:28,592 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 00:05:28,593 INFO L225 Difference]: With dead ends: 317 [2020-10-15 00:05:28,593 INFO L226 Difference]: Without dead ends: 172 [2020-10-15 00:05:28,594 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=78, Invalid=678, Unknown=0, NotChecked=0, Total=756 [2020-10-15 00:05:28,595 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2020-10-15 00:05:28,610 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 157. [2020-10-15 00:05:28,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 157 states. [2020-10-15 00:05:28,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 180 transitions. [2020-10-15 00:05:28,612 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 180 transitions. Word has length 37 [2020-10-15 00:05:28,612 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 00:05:28,612 INFO L479 AbstractCegarLoop]: Abstraction has 157 states and 180 transitions. [2020-10-15 00:05:28,612 INFO L480 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-10-15 00:05:28,612 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 180 transitions. [2020-10-15 00:05:28,613 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-10-15 00:05:28,613 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 00:05:28,613 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 00:05:28,613 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2020-10-15 00:05:28,614 INFO L427 AbstractCegarLoop]: === Iteration 32 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 00:05:28,614 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 00:05:28,614 INFO L82 PathProgramCache]: Analyzing trace with hash -1829906143, now seen corresponding path program 4 times [2020-10-15 00:05:28,614 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 00:05:28,614 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2065702190] [2020-10-15 00:05:28,615 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 00:05:28,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:05:28,620 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:05:28,625 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:05:28,633 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:05:28,641 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:05:28,724 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:05:29,563 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:05:31,080 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:05:31,081 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 58 [2020-10-15 00:05:31,081 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-15 00:05:31,081 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2462 [2020-10-15 00:05:31,081 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:05:31,082 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:05:31,082 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-15 00:05:31,082 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-15 00:05:31,082 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 42 [2020-10-15 00:05:31,082 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-15 00:05:31,156 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 00:05:31,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:05:31,158 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:05:31,158 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:05:31,158 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-15 00:05:31,159 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:05:31,159 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-15 00:05:31,159 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:05:31,159 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:05:31,159 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 00:05:31,160 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 00:05:31,160 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 00:05:31,160 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:05:31,161 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-15 00:05:31,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:05:31,164 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:05:31,167 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:05:31,167 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-15 00:05:31,168 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:05:31,168 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-15 00:05:31,168 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:05:31,168 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:05:31,168 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-15 00:05:31,169 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 00:05:31,169 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-15 00:05:31,169 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:05:31,170 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-10-15 00:05:31,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:05:31,173 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:05:31,176 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:05:31,176 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-15 00:05:31,176 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:05:31,176 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-15 00:05:31,177 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:05:31,177 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:05:31,177 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-15 00:05:31,177 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 00:05:31,177 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-15 00:05:31,177 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:05:31,179 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-10-15 00:05:31,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:05:31,182 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:05:31,184 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:05:31,185 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-15 00:05:31,185 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:05:31,185 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-15 00:05:31,185 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:05:31,186 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:05:31,186 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-15 00:05:31,186 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 00:05:31,186 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-15 00:05:31,186 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:05:31,188 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2020-10-15 00:05:31,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:05:31,190 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:05:31,194 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:05:31,194 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-15 00:05:31,194 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:05:31,194 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-15 00:05:31,195 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:05:31,195 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:05:31,195 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-15 00:05:31,195 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 00:05:31,195 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-15 00:05:31,196 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:05:31,199 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 8 proven. 28 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2020-10-15 00:05:31,199 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2065702190] [2020-10-15 00:05:31,200 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-15 00:05:31,200 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-15 00:05:31,200 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1115570256] [2020-10-15 00:05:31,200 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-15 00:05:31,201 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 00:05:31,201 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-15 00:05:31,201 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-15 00:05:31,201 INFO L87 Difference]: Start difference. First operand 157 states and 180 transitions. Second operand 7 states. [2020-10-15 00:05:31,318 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 00:05:31,318 INFO L93 Difference]: Finished difference Result 233 states and 268 transitions. [2020-10-15 00:05:31,318 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-15 00:05:31,319 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 42 [2020-10-15 00:05:31,319 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 00:05:31,321 INFO L225 Difference]: With dead ends: 233 [2020-10-15 00:05:31,321 INFO L226 Difference]: Without dead ends: 226 [2020-10-15 00:05:31,322 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-15 00:05:31,323 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 226 states. [2020-10-15 00:05:31,352 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 226 to 192. [2020-10-15 00:05:31,352 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 192 states. [2020-10-15 00:05:31,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 192 states to 192 states and 221 transitions. [2020-10-15 00:05:31,353 INFO L78 Accepts]: Start accepts. Automaton has 192 states and 221 transitions. Word has length 42 [2020-10-15 00:05:31,353 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 00:05:31,353 INFO L479 AbstractCegarLoop]: Abstraction has 192 states and 221 transitions. [2020-10-15 00:05:31,353 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-15 00:05:31,354 INFO L276 IsEmpty]: Start isEmpty. Operand 192 states and 221 transitions. [2020-10-15 00:05:31,354 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-10-15 00:05:31,354 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 00:05:31,354 INFO L422 BasicCegarLoop]: trace histogram [26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 00:05:31,355 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2020-10-15 00:05:31,355 INFO L427 AbstractCegarLoop]: === Iteration 33 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 00:05:31,355 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 00:05:31,355 INFO L82 PathProgramCache]: Analyzing trace with hash -291114486, now seen corresponding path program 26 times [2020-10-15 00:05:31,355 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 00:05:31,356 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [306099457] [2020-10-15 00:05:31,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 00:05:31,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:05:31,373 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:05:32,044 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:05:32,044 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 46 [2020-10-15 00:05:32,044 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:05:32,044 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 678 [2020-10-15 00:05:32,045 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:05:32,045 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:05:32,045 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 28 [2020-10-15 00:05:32,045 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-15 00:05:32,045 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-10-15 00:05:32,045 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:05:32,701 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 00:05:32,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:05:32,703 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:05:32,703 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:05:32,703 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-15 00:05:32,704 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:05:32,704 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-15 00:05:32,704 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:05:32,704 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:05:32,705 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 00:05:32,705 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 00:05:32,705 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 00:05:32,705 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:05:32,708 INFO L134 CoverageAnalysis]: Checked inductivity of 351 backedges. 0 proven. 351 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 00:05:32,708 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [306099457] [2020-10-15 00:05:32,708 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-15 00:05:32,708 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29] total 29 [2020-10-15 00:05:32,709 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1020950772] [2020-10-15 00:05:32,709 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-10-15 00:05:32,709 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 00:05:32,709 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-10-15 00:05:32,709 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=731, Unknown=0, NotChecked=0, Total=812 [2020-10-15 00:05:32,710 INFO L87 Difference]: Start difference. First operand 192 states and 221 transitions. Second operand 29 states. [2020-10-15 00:05:33,302 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 00:05:33,302 INFO L93 Difference]: Finished difference Result 400 states and 470 transitions. [2020-10-15 00:05:33,303 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-15 00:05:33,303 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 38 [2020-10-15 00:05:33,303 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 00:05:33,306 INFO L225 Difference]: With dead ends: 400 [2020-10-15 00:05:33,306 INFO L226 Difference]: Without dead ends: 216 [2020-10-15 00:05:33,310 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=81, Invalid=731, Unknown=0, NotChecked=0, Total=812 [2020-10-15 00:05:33,310 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 216 states. [2020-10-15 00:05:33,332 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 216 to 197. [2020-10-15 00:05:33,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 197 states. [2020-10-15 00:05:33,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 197 states to 197 states and 226 transitions. [2020-10-15 00:05:33,335 INFO L78 Accepts]: Start accepts. Automaton has 197 states and 226 transitions. Word has length 38 [2020-10-15 00:05:33,335 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 00:05:33,335 INFO L479 AbstractCegarLoop]: Abstraction has 197 states and 226 transitions. [2020-10-15 00:05:33,335 INFO L480 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-10-15 00:05:33,335 INFO L276 IsEmpty]: Start isEmpty. Operand 197 states and 226 transitions. [2020-10-15 00:05:33,337 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-10-15 00:05:33,337 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 00:05:33,337 INFO L422 BasicCegarLoop]: trace histogram [27, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 00:05:33,338 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2020-10-15 00:05:33,338 INFO L427 AbstractCegarLoop]: === Iteration 34 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 00:05:33,338 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 00:05:33,338 INFO L82 PathProgramCache]: Analyzing trace with hash -408311913, now seen corresponding path program 27 times [2020-10-15 00:05:33,338 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 00:05:33,339 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1105128992] [2020-10-15 00:05:33,339 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 00:05:33,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:05:33,357 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:05:34,012 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:05:34,012 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 47 [2020-10-15 00:05:34,012 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:05:34,012 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 662 [2020-10-15 00:05:34,013 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:05:34,013 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:05:34,013 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 29 [2020-10-15 00:05:34,013 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-15 00:05:34,013 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 29 [2020-10-15 00:05:34,013 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:05:34,704 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 00:05:34,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:05:34,705 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:05:34,705 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:05:34,705 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-15 00:05:34,705 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:05:34,706 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-15 00:05:34,706 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:05:34,706 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:05:34,706 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 00:05:34,706 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 00:05:34,706 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 00:05:34,706 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:05:34,709 INFO L134 CoverageAnalysis]: Checked inductivity of 378 backedges. 0 proven. 378 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 00:05:34,710 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1105128992] [2020-10-15 00:05:34,710 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-15 00:05:34,710 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30] total 30 [2020-10-15 00:05:34,710 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [498419678] [2020-10-15 00:05:34,710 INFO L459 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-10-15 00:05:34,710 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 00:05:34,711 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-10-15 00:05:34,711 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=786, Unknown=0, NotChecked=0, Total=870 [2020-10-15 00:05:34,711 INFO L87 Difference]: Start difference. First operand 197 states and 226 transitions. Second operand 30 states. [2020-10-15 00:05:35,338 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 00:05:35,338 INFO L93 Difference]: Finished difference Result 410 states and 480 transitions. [2020-10-15 00:05:35,339 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-10-15 00:05:35,339 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 39 [2020-10-15 00:05:35,340 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 00:05:35,341 INFO L225 Difference]: With dead ends: 410 [2020-10-15 00:05:35,341 INFO L226 Difference]: Without dead ends: 221 [2020-10-15 00:05:35,342 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=84, Invalid=786, Unknown=0, NotChecked=0, Total=870 [2020-10-15 00:05:35,343 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 221 states. [2020-10-15 00:05:35,364 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 221 to 202. [2020-10-15 00:05:35,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 202 states. [2020-10-15 00:05:35,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 202 states to 202 states and 231 transitions. [2020-10-15 00:05:35,365 INFO L78 Accepts]: Start accepts. Automaton has 202 states and 231 transitions. Word has length 39 [2020-10-15 00:05:35,366 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 00:05:35,366 INFO L479 AbstractCegarLoop]: Abstraction has 202 states and 231 transitions. [2020-10-15 00:05:35,366 INFO L480 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-10-15 00:05:35,366 INFO L276 IsEmpty]: Start isEmpty. Operand 202 states and 231 transitions. [2020-10-15 00:05:35,366 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-10-15 00:05:35,367 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 00:05:35,367 INFO L422 BasicCegarLoop]: trace histogram [28, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 00:05:35,367 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2020-10-15 00:05:35,367 INFO L427 AbstractCegarLoop]: === Iteration 35 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 00:05:35,367 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 00:05:35,367 INFO L82 PathProgramCache]: Analyzing trace with hash 253535146, now seen corresponding path program 28 times [2020-10-15 00:05:35,368 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 00:05:35,368 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [668646444] [2020-10-15 00:05:35,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 00:05:35,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:05:35,385 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:05:36,131 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:05:36,861 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:05:36,862 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 48 [2020-10-15 00:05:36,862 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-15 00:05:36,862 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1483 [2020-10-15 00:05:36,862 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:05:36,862 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:05:36,863 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 30 [2020-10-15 00:05:36,863 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-15 00:05:36,863 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-15 00:05:36,863 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:05:37,608 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 00:05:37,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:05:37,610 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:05:37,610 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:05:37,611 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-15 00:05:37,611 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:05:37,611 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-15 00:05:37,611 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:05:37,611 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:05:37,612 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 00:05:37,612 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 00:05:37,612 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 00:05:37,612 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:05:37,614 INFO L134 CoverageAnalysis]: Checked inductivity of 406 backedges. 0 proven. 406 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 00:05:37,615 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [668646444] [2020-10-15 00:05:37,615 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-15 00:05:37,615 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31] total 31 [2020-10-15 00:05:37,615 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [329061529] [2020-10-15 00:05:37,615 INFO L459 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-10-15 00:05:37,616 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 00:05:37,616 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-10-15 00:05:37,616 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=843, Unknown=0, NotChecked=0, Total=930 [2020-10-15 00:05:37,616 INFO L87 Difference]: Start difference. First operand 202 states and 231 transitions. Second operand 31 states. [2020-10-15 00:05:38,254 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 00:05:38,254 INFO L93 Difference]: Finished difference Result 420 states and 490 transitions. [2020-10-15 00:05:38,254 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-15 00:05:38,255 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 40 [2020-10-15 00:05:38,255 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 00:05:38,256 INFO L225 Difference]: With dead ends: 420 [2020-10-15 00:05:38,256 INFO L226 Difference]: Without dead ends: 226 [2020-10-15 00:05:38,258 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=87, Invalid=843, Unknown=0, NotChecked=0, Total=930 [2020-10-15 00:05:38,258 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 226 states. [2020-10-15 00:05:38,280 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 226 to 207. [2020-10-15 00:05:38,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 207 states. [2020-10-15 00:05:38,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 207 states to 207 states and 236 transitions. [2020-10-15 00:05:38,282 INFO L78 Accepts]: Start accepts. Automaton has 207 states and 236 transitions. Word has length 40 [2020-10-15 00:05:38,282 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 00:05:38,282 INFO L479 AbstractCegarLoop]: Abstraction has 207 states and 236 transitions. [2020-10-15 00:05:38,282 INFO L480 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-10-15 00:05:38,283 INFO L276 IsEmpty]: Start isEmpty. Operand 207 states and 236 transitions. [2020-10-15 00:05:38,283 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-10-15 00:05:38,283 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 00:05:38,283 INFO L422 BasicCegarLoop]: trace histogram [29, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 00:05:38,284 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2020-10-15 00:05:38,284 INFO L427 AbstractCegarLoop]: === Iteration 36 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 00:05:38,284 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 00:05:38,284 INFO L82 PathProgramCache]: Analyzing trace with hash -704042505, now seen corresponding path program 29 times [2020-10-15 00:05:38,284 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 00:05:38,285 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2078809338] [2020-10-15 00:05:38,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 00:05:38,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:05:38,303 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:05:39,200 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:05:39,201 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 49 [2020-10-15 00:05:39,201 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:05:39,201 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 905 [2020-10-15 00:05:39,201 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:05:39,201 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:05:39,201 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 31 [2020-10-15 00:05:39,201 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-15 00:05:39,202 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 31 [2020-10-15 00:05:39,202 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:05:40,009 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 00:05:40,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:05:40,011 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:05:40,012 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:05:40,012 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-15 00:05:40,012 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:05:40,012 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-15 00:05:40,013 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:05:40,013 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:05:40,013 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 00:05:40,013 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 00:05:40,013 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 00:05:40,013 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:05:40,016 INFO L134 CoverageAnalysis]: Checked inductivity of 435 backedges. 0 proven. 435 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 00:05:40,016 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2078809338] [2020-10-15 00:05:40,016 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-15 00:05:40,016 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32] total 32 [2020-10-15 00:05:40,017 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [381098113] [2020-10-15 00:05:40,017 INFO L459 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-10-15 00:05:40,017 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 00:05:40,017 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-10-15 00:05:40,018 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=902, Unknown=0, NotChecked=0, Total=992 [2020-10-15 00:05:40,018 INFO L87 Difference]: Start difference. First operand 207 states and 236 transitions. Second operand 32 states. [2020-10-15 00:05:40,715 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 00:05:40,715 INFO L93 Difference]: Finished difference Result 430 states and 500 transitions. [2020-10-15 00:05:40,716 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-10-15 00:05:40,716 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 41 [2020-10-15 00:05:40,717 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 00:05:40,719 INFO L225 Difference]: With dead ends: 430 [2020-10-15 00:05:40,719 INFO L226 Difference]: Without dead ends: 231 [2020-10-15 00:05:40,722 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=90, Invalid=902, Unknown=0, NotChecked=0, Total=992 [2020-10-15 00:05:40,722 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 231 states. [2020-10-15 00:05:40,745 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 231 to 212. [2020-10-15 00:05:40,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 212 states. [2020-10-15 00:05:40,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 212 states to 212 states and 241 transitions. [2020-10-15 00:05:40,746 INFO L78 Accepts]: Start accepts. Automaton has 212 states and 241 transitions. Word has length 41 [2020-10-15 00:05:40,747 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 00:05:40,747 INFO L479 AbstractCegarLoop]: Abstraction has 212 states and 241 transitions. [2020-10-15 00:05:40,747 INFO L480 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-10-15 00:05:40,747 INFO L276 IsEmpty]: Start isEmpty. Operand 212 states and 241 transitions. [2020-10-15 00:05:40,748 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-10-15 00:05:40,748 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 00:05:40,748 INFO L422 BasicCegarLoop]: trace histogram [30, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 00:05:40,748 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2020-10-15 00:05:40,748 INFO L427 AbstractCegarLoop]: === Iteration 37 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 00:05:40,748 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 00:05:40,749 INFO L82 PathProgramCache]: Analyzing trace with hash -324178614, now seen corresponding path program 30 times [2020-10-15 00:05:40,749 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 00:05:40,749 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1460425242] [2020-10-15 00:05:40,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 00:05:40,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:05:40,770 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:05:41,781 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:05:41,781 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 50 [2020-10-15 00:05:41,781 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:05:41,781 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1019 [2020-10-15 00:05:41,781 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:05:41,781 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:05:41,782 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 32 [2020-10-15 00:05:41,782 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-15 00:05:41,782 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-15 00:05:41,782 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:05:42,617 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 00:05:42,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:05:42,618 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:05:42,618 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:05:42,619 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-15 00:05:42,619 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:05:42,619 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-15 00:05:42,619 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:05:42,619 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:05:42,620 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 00:05:42,620 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 00:05:42,620 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 00:05:42,620 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:05:42,623 INFO L134 CoverageAnalysis]: Checked inductivity of 465 backedges. 0 proven. 465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 00:05:42,623 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1460425242] [2020-10-15 00:05:42,623 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-15 00:05:42,623 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33] total 33 [2020-10-15 00:05:42,623 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2012441319] [2020-10-15 00:05:42,624 INFO L459 AbstractCegarLoop]: Interpolant automaton has 33 states [2020-10-15 00:05:42,624 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 00:05:42,624 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2020-10-15 00:05:42,625 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=963, Unknown=0, NotChecked=0, Total=1056 [2020-10-15 00:05:42,625 INFO L87 Difference]: Start difference. First operand 212 states and 241 transitions. Second operand 33 states. [2020-10-15 00:05:43,339 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 00:05:43,339 INFO L93 Difference]: Finished difference Result 440 states and 510 transitions. [2020-10-15 00:05:43,340 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-10-15 00:05:43,340 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 42 [2020-10-15 00:05:43,340 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 00:05:43,343 INFO L225 Difference]: With dead ends: 440 [2020-10-15 00:05:43,343 INFO L226 Difference]: Without dead ends: 236 [2020-10-15 00:05:43,345 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=93, Invalid=963, Unknown=0, NotChecked=0, Total=1056 [2020-10-15 00:05:43,345 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 236 states. [2020-10-15 00:05:43,384 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 236 to 217. [2020-10-15 00:05:43,384 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 217 states. [2020-10-15 00:05:43,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 217 states to 217 states and 246 transitions. [2020-10-15 00:05:43,386 INFO L78 Accepts]: Start accepts. Automaton has 217 states and 246 transitions. Word has length 42 [2020-10-15 00:05:43,387 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 00:05:43,387 INFO L479 AbstractCegarLoop]: Abstraction has 217 states and 246 transitions. [2020-10-15 00:05:43,387 INFO L480 AbstractCegarLoop]: Interpolant automaton has 33 states. [2020-10-15 00:05:43,387 INFO L276 IsEmpty]: Start isEmpty. Operand 217 states and 246 transitions. [2020-10-15 00:05:43,388 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-10-15 00:05:43,388 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 00:05:43,389 INFO L422 BasicCegarLoop]: trace histogram [31, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 00:05:43,389 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2020-10-15 00:05:43,389 INFO L427 AbstractCegarLoop]: === Iteration 38 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 00:05:43,389 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 00:05:43,389 INFO L82 PathProgramCache]: Analyzing trace with hash -1433299881, now seen corresponding path program 31 times [2020-10-15 00:05:43,390 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 00:05:43,390 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1968098828] [2020-10-15 00:05:43,390 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 00:05:43,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:05:43,415 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:05:44,604 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:05:44,604 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 51 [2020-10-15 00:05:44,604 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:05:44,604 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1201 [2020-10-15 00:05:44,605 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:05:44,605 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:05:44,605 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 33 [2020-10-15 00:05:44,605 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-15 00:05:44,605 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 33 [2020-10-15 00:05:44,605 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:05:45,527 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 00:05:45,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:05:45,529 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:05:45,530 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:05:45,530 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-15 00:05:45,530 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:05:45,530 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-15 00:05:45,531 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:05:45,531 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:05:45,531 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 00:05:45,532 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 00:05:45,532 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 00:05:45,532 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-15 00:05:45,536 INFO L134 CoverageAnalysis]: Checked inductivity of 496 backedges. 0 proven. 496 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 00:05:45,536 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1968098828] [2020-10-15 00:05:45,537 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-15 00:05:45,537 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34] total 34 [2020-10-15 00:05:45,537 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [87565034] [2020-10-15 00:05:45,537 INFO L459 AbstractCegarLoop]: Interpolant automaton has 34 states [2020-10-15 00:05:45,537 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 00:05:45,538 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2020-10-15 00:05:45,538 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=1026, Unknown=0, NotChecked=0, Total=1122 [2020-10-15 00:05:45,538 INFO L87 Difference]: Start difference. First operand 217 states and 246 transitions. Second operand 34 states. [2020-10-15 00:05:46,312 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 00:05:46,312 INFO L93 Difference]: Finished difference Result 450 states and 520 transitions. [2020-10-15 00:05:46,312 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-10-15 00:05:46,312 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 43 [2020-10-15 00:05:46,313 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 00:05:46,314 INFO L225 Difference]: With dead ends: 450 [2020-10-15 00:05:46,314 INFO L226 Difference]: Without dead ends: 241 [2020-10-15 00:05:46,316 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=96, Invalid=1026, Unknown=0, NotChecked=0, Total=1122 [2020-10-15 00:05:46,317 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 241 states. [2020-10-15 00:05:46,344 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 241 to 222. [2020-10-15 00:05:46,345 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 222 states. [2020-10-15 00:05:46,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 222 states to 222 states and 251 transitions. [2020-10-15 00:05:46,348 INFO L78 Accepts]: Start accepts. Automaton has 222 states and 251 transitions. Word has length 43 [2020-10-15 00:05:46,349 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 00:05:46,349 INFO L479 AbstractCegarLoop]: Abstraction has 222 states and 251 transitions. [2020-10-15 00:05:46,349 INFO L480 AbstractCegarLoop]: Interpolant automaton has 34 states. [2020-10-15 00:05:46,349 INFO L276 IsEmpty]: Start isEmpty. Operand 222 states and 251 transitions. [2020-10-15 00:05:46,354 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2020-10-15 00:05:46,354 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 00:05:46,354 INFO L422 BasicCegarLoop]: trace histogram [32, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 00:05:46,354 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2020-10-15 00:05:46,355 INFO L427 AbstractCegarLoop]: === Iteration 39 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 00:05:46,355 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 00:05:46,355 INFO L82 PathProgramCache]: Analyzing trace with hash -1456320790, now seen corresponding path program 32 times [2020-10-15 00:05:46,357 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 00:05:46,357 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1966800027] [2020-10-15 00:05:46,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 00:05:46,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:05:46,383 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:05:47,012 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:05:47,804 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:05:47,805 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 52 [2020-10-15 00:05:47,805 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-15 00:05:47,805 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1433 [2020-10-15 00:05:47,805 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:05:47,805 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:05:47,805 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 34 [2020-10-15 00:05:47,805 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-15 00:05:47,806 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 34 [2020-10-15 00:05:47,806 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:05:48,790 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 00:05:48,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:05:48,791 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:05:48,792 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:05:48,792 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-15 00:05:48,792 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:05:48,792 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-15 00:05:48,793 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:05:48,793 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:05:48,793 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 00:05:48,794 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 00:05:48,794 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 00:05:48,794 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-15 00:05:48,798 INFO L134 CoverageAnalysis]: Checked inductivity of 528 backedges. 0 proven. 528 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 00:05:48,798 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1966800027] [2020-10-15 00:05:48,798 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-15 00:05:48,799 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35] total 35 [2020-10-15 00:05:48,799 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1893093802] [2020-10-15 00:05:48,799 INFO L459 AbstractCegarLoop]: Interpolant automaton has 35 states [2020-10-15 00:05:48,799 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 00:05:48,799 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2020-10-15 00:05:48,800 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=1091, Unknown=0, NotChecked=0, Total=1190 [2020-10-15 00:05:48,800 INFO L87 Difference]: Start difference. First operand 222 states and 251 transitions. Second operand 35 states. [2020-10-15 00:05:49,639 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 00:05:49,640 INFO L93 Difference]: Finished difference Result 460 states and 530 transitions. [2020-10-15 00:05:49,640 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-10-15 00:05:49,640 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 44 [2020-10-15 00:05:49,640 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 00:05:49,642 INFO L225 Difference]: With dead ends: 460 [2020-10-15 00:05:49,642 INFO L226 Difference]: Without dead ends: 246 [2020-10-15 00:05:49,643 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=99, Invalid=1091, Unknown=0, NotChecked=0, Total=1190 [2020-10-15 00:05:49,643 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 246 states. [2020-10-15 00:05:49,669 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 246 to 227. [2020-10-15 00:05:49,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 227 states. [2020-10-15 00:05:49,670 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 227 states to 227 states and 256 transitions. [2020-10-15 00:05:49,670 INFO L78 Accepts]: Start accepts. Automaton has 227 states and 256 transitions. Word has length 44 [2020-10-15 00:05:49,671 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 00:05:49,671 INFO L479 AbstractCegarLoop]: Abstraction has 227 states and 256 transitions. [2020-10-15 00:05:49,671 INFO L480 AbstractCegarLoop]: Interpolant automaton has 35 states. [2020-10-15 00:05:49,671 INFO L276 IsEmpty]: Start isEmpty. Operand 227 states and 256 transitions. [2020-10-15 00:05:49,672 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2020-10-15 00:05:49,672 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 00:05:49,672 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 00:05:49,672 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2020-10-15 00:05:49,672 INFO L427 AbstractCegarLoop]: === Iteration 40 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 00:05:49,672 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 00:05:49,673 INFO L82 PathProgramCache]: Analyzing trace with hash 510723554, now seen corresponding path program 5 times [2020-10-15 00:05:49,673 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 00:05:49,673 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1420234341] [2020-10-15 00:05:49,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 00:05:49,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:05:49,679 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:05:49,683 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:05:49,693 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:05:49,703 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:05:49,747 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:05:49,865 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:05:53,190 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:05:53,190 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 68 [2020-10-15 00:05:53,191 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-15 00:05:53,191 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3513 [2020-10-15 00:05:53,191 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:05:53,191 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:05:53,191 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-15 00:05:53,191 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-15 00:05:53,192 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 52 [2020-10-15 00:05:53,192 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:05:53,286 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 00:05:53,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:05:53,287 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:05:53,288 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:05:53,288 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-15 00:05:53,288 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:05:53,288 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-15 00:05:53,289 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:05:53,289 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:05:53,289 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 00:05:53,289 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 00:05:53,290 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 00:05:53,290 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-15 00:05:53,291 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-15 00:05:53,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:05:53,294 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:05:53,298 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:05:53,299 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-15 00:05:53,299 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:05:53,299 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-15 00:05:53,299 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:05:53,299 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:05:53,300 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-15 00:05:53,300 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 00:05:53,300 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-15 00:05:53,300 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-15 00:05:53,302 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-10-15 00:05:53,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:05:53,305 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:05:53,310 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:05:53,310 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-15 00:05:53,310 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:05:53,311 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-15 00:05:53,311 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:05:53,311 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:05:53,311 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-15 00:05:53,312 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 00:05:53,312 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-15 00:05:53,312 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-15 00:05:53,314 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-10-15 00:05:53,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:05:53,318 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:05:53,322 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:05:53,323 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-15 00:05:53,323 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:05:53,323 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-15 00:05:53,323 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:05:53,324 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:05:53,324 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-15 00:05:53,324 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 00:05:53,324 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-15 00:05:53,325 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-15 00:05:53,327 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2020-10-15 00:05:53,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:05:53,329 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:05:53,333 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:05:53,333 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-15 00:05:53,334 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:05:53,334 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-15 00:05:53,334 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:05:53,334 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:05:53,334 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-15 00:05:53,335 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 00:05:53,335 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-15 00:05:53,345 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 11 [2020-10-15 00:05:53,347 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2020-10-15 00:05:53,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:05:53,350 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:05:53,353 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:05:53,353 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-15 00:05:53,353 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:05:53,354 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-15 00:05:53,354 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:05:53,354 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:05:53,354 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-15 00:05:53,354 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 00:05:53,355 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-15 00:05:53,355 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:05:53,360 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 10 proven. 45 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2020-10-15 00:05:53,360 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1420234341] [2020-10-15 00:05:53,360 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-15 00:05:53,361 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-15 00:05:53,361 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1101213496] [2020-10-15 00:05:53,361 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-15 00:05:53,361 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 00:05:53,361 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-15 00:05:53,362 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2020-10-15 00:05:53,362 INFO L87 Difference]: Start difference. First operand 227 states and 256 transitions. Second operand 8 states. [2020-10-15 00:05:53,511 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 00:05:53,511 INFO L93 Difference]: Finished difference Result 317 states and 358 transitions. [2020-10-15 00:05:53,512 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-15 00:05:53,512 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 50 [2020-10-15 00:05:53,512 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 00:05:53,513 INFO L225 Difference]: With dead ends: 317 [2020-10-15 00:05:53,514 INFO L226 Difference]: Without dead ends: 310 [2020-10-15 00:05:53,514 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2020-10-15 00:05:53,515 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 310 states. [2020-10-15 00:05:53,543 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 310 to 269. [2020-10-15 00:05:53,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 269 states. [2020-10-15 00:05:53,544 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 269 states to 269 states and 304 transitions. [2020-10-15 00:05:53,544 INFO L78 Accepts]: Start accepts. Automaton has 269 states and 304 transitions. Word has length 50 [2020-10-15 00:05:53,545 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 00:05:53,545 INFO L479 AbstractCegarLoop]: Abstraction has 269 states and 304 transitions. [2020-10-15 00:05:53,545 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-15 00:05:53,545 INFO L276 IsEmpty]: Start isEmpty. Operand 269 states and 304 transitions. [2020-10-15 00:05:53,546 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-10-15 00:05:53,546 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 00:05:53,546 INFO L422 BasicCegarLoop]: trace histogram [33, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 00:05:53,546 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2020-10-15 00:05:53,546 INFO L427 AbstractCegarLoop]: === Iteration 41 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 00:05:53,547 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 00:05:53,547 INFO L82 PathProgramCache]: Analyzing trace with hash 2124998327, now seen corresponding path program 33 times [2020-10-15 00:05:53,547 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 00:05:53,547 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2139027511] [2020-10-15 00:05:53,547 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 00:05:53,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:05:53,565 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:05:54,508 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:05:54,509 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 53 [2020-10-15 00:05:54,509 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:05:54,509 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 949 [2020-10-15 00:05:54,509 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:05:54,509 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:05:54,509 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 35 [2020-10-15 00:05:54,509 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-15 00:05:54,510 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 35 [2020-10-15 00:05:54,510 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:05:55,767 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 00:05:55,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:05:55,768 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:05:55,769 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:05:55,769 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-15 00:05:55,770 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:05:55,770 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-15 00:05:55,772 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:05:55,773 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:05:55,773 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 00:05:55,773 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 00:05:55,774 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 00:05:55,774 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-15 00:05:55,781 INFO L134 CoverageAnalysis]: Checked inductivity of 561 backedges. 0 proven. 561 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 00:05:55,782 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2139027511] [2020-10-15 00:05:55,782 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-15 00:05:55,782 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36] total 36 [2020-10-15 00:05:55,782 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1278631356] [2020-10-15 00:05:55,783 INFO L459 AbstractCegarLoop]: Interpolant automaton has 36 states [2020-10-15 00:05:55,783 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 00:05:55,783 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2020-10-15 00:05:55,784 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=1158, Unknown=0, NotChecked=0, Total=1260 [2020-10-15 00:05:55,785 INFO L87 Difference]: Start difference. First operand 269 states and 304 transitions. Second operand 36 states. [2020-10-15 00:05:56,832 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 00:05:56,832 INFO L93 Difference]: Finished difference Result 559 states and 644 transitions. [2020-10-15 00:05:56,833 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-10-15 00:05:56,833 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 45 [2020-10-15 00:05:56,833 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 00:05:56,835 INFO L225 Difference]: With dead ends: 559 [2020-10-15 00:05:56,835 INFO L226 Difference]: Without dead ends: 298 [2020-10-15 00:05:56,836 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=102, Invalid=1158, Unknown=0, NotChecked=0, Total=1260 [2020-10-15 00:05:56,837 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 298 states. [2020-10-15 00:05:56,875 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 298 to 275. [2020-10-15 00:05:56,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 275 states. [2020-10-15 00:05:56,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 275 states to 275 states and 310 transitions. [2020-10-15 00:05:56,878 INFO L78 Accepts]: Start accepts. Automaton has 275 states and 310 transitions. Word has length 45 [2020-10-15 00:05:56,879 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 00:05:56,879 INFO L479 AbstractCegarLoop]: Abstraction has 275 states and 310 transitions. [2020-10-15 00:05:56,879 INFO L480 AbstractCegarLoop]: Interpolant automaton has 36 states. [2020-10-15 00:05:56,879 INFO L276 IsEmpty]: Start isEmpty. Operand 275 states and 310 transitions. [2020-10-15 00:05:56,880 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-10-15 00:05:56,880 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 00:05:56,880 INFO L422 BasicCegarLoop]: trace histogram [34, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 00:05:56,880 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2020-10-15 00:05:56,880 INFO L427 AbstractCegarLoop]: === Iteration 42 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 00:05:56,881 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 00:05:56,881 INFO L82 PathProgramCache]: Analyzing trace with hash 1476741258, now seen corresponding path program 34 times [2020-10-15 00:05:56,881 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 00:05:56,881 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1818338101] [2020-10-15 00:05:56,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 00:05:56,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:05:56,906 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:05:58,058 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:05:58,058 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 54 [2020-10-15 00:05:58,058 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:05:58,058 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1162 [2020-10-15 00:05:58,059 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:05:58,059 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:05:58,059 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 36 [2020-10-15 00:05:58,059 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-15 00:05:58,059 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 36 [2020-10-15 00:05:58,059 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:05:59,103 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 00:05:59,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:05:59,104 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:05:59,105 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:05:59,105 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-15 00:05:59,105 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:05:59,105 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-15 00:05:59,105 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:05:59,106 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:05:59,106 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 00:05:59,106 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 00:05:59,106 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 00:05:59,106 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-15 00:05:59,111 INFO L134 CoverageAnalysis]: Checked inductivity of 595 backedges. 0 proven. 595 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 00:05:59,111 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1818338101] [2020-10-15 00:05:59,112 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-15 00:05:59,112 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37] total 37 [2020-10-15 00:05:59,112 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1865607250] [2020-10-15 00:05:59,112 INFO L459 AbstractCegarLoop]: Interpolant automaton has 37 states [2020-10-15 00:05:59,112 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 00:05:59,112 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2020-10-15 00:05:59,113 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=1227, Unknown=0, NotChecked=0, Total=1332 [2020-10-15 00:05:59,113 INFO L87 Difference]: Start difference. First operand 275 states and 310 transitions. Second operand 37 states. [2020-10-15 00:06:00,050 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 00:06:00,050 INFO L93 Difference]: Finished difference Result 571 states and 656 transitions. [2020-10-15 00:06:00,051 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-10-15 00:06:00,051 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 46 [2020-10-15 00:06:00,052 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 00:06:00,053 INFO L225 Difference]: With dead ends: 571 [2020-10-15 00:06:00,054 INFO L226 Difference]: Without dead ends: 304 [2020-10-15 00:06:00,055 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=105, Invalid=1227, Unknown=0, NotChecked=0, Total=1332 [2020-10-15 00:06:00,055 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 304 states. [2020-10-15 00:06:00,086 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 304 to 281. [2020-10-15 00:06:00,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 281 states. [2020-10-15 00:06:00,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 281 states to 281 states and 316 transitions. [2020-10-15 00:06:00,088 INFO L78 Accepts]: Start accepts. Automaton has 281 states and 316 transitions. Word has length 46 [2020-10-15 00:06:00,088 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 00:06:00,088 INFO L479 AbstractCegarLoop]: Abstraction has 281 states and 316 transitions. [2020-10-15 00:06:00,088 INFO L480 AbstractCegarLoop]: Interpolant automaton has 37 states. [2020-10-15 00:06:00,088 INFO L276 IsEmpty]: Start isEmpty. Operand 281 states and 316 transitions. [2020-10-15 00:06:00,089 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-10-15 00:06:00,089 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 00:06:00,089 INFO L422 BasicCegarLoop]: trace histogram [35, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 00:06:00,089 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2020-10-15 00:06:00,089 INFO L427 AbstractCegarLoop]: === Iteration 43 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 00:06:00,090 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 00:06:00,090 INFO L82 PathProgramCache]: Analyzing trace with hash -1439358697, now seen corresponding path program 35 times [2020-10-15 00:06:00,090 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 00:06:00,090 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [255685013] [2020-10-15 00:06:00,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 00:06:00,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:06:00,114 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:06:01,077 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:06:01,077 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 55 [2020-10-15 00:06:01,077 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:06:01,077 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 972 [2020-10-15 00:06:01,077 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:06:01,078 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:06:01,078 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 37 [2020-10-15 00:06:01,078 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-15 00:06:01,078 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 37 [2020-10-15 00:06:01,078 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:06:02,188 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 00:06:02,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:06:02,190 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:06:02,191 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:06:02,191 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-15 00:06:02,191 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:06:02,191 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-15 00:06:02,191 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:06:02,192 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:06:02,192 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 00:06:02,192 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 00:06:02,192 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 00:06:02,192 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:06:02,206 INFO L134 CoverageAnalysis]: Checked inductivity of 630 backedges. 0 proven. 630 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 00:06:02,207 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [255685013] [2020-10-15 00:06:02,207 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-15 00:06:02,207 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38] total 38 [2020-10-15 00:06:02,207 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1568617740] [2020-10-15 00:06:02,207 INFO L459 AbstractCegarLoop]: Interpolant automaton has 38 states [2020-10-15 00:06:02,207 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 00:06:02,208 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2020-10-15 00:06:02,208 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=1298, Unknown=0, NotChecked=0, Total=1406 [2020-10-15 00:06:02,208 INFO L87 Difference]: Start difference. First operand 281 states and 316 transitions. Second operand 38 states. [2020-10-15 00:06:03,171 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 00:06:03,171 INFO L93 Difference]: Finished difference Result 583 states and 668 transitions. [2020-10-15 00:06:03,171 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-10-15 00:06:03,171 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 47 [2020-10-15 00:06:03,172 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 00:06:03,173 INFO L225 Difference]: With dead ends: 583 [2020-10-15 00:06:03,173 INFO L226 Difference]: Without dead ends: 310 [2020-10-15 00:06:03,174 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=108, Invalid=1298, Unknown=0, NotChecked=0, Total=1406 [2020-10-15 00:06:03,175 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 310 states. [2020-10-15 00:06:03,203 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 310 to 287. [2020-10-15 00:06:03,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 287 states. [2020-10-15 00:06:03,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 287 states to 287 states and 322 transitions. [2020-10-15 00:06:03,205 INFO L78 Accepts]: Start accepts. Automaton has 287 states and 322 transitions. Word has length 47 [2020-10-15 00:06:03,205 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 00:06:03,205 INFO L479 AbstractCegarLoop]: Abstraction has 287 states and 322 transitions. [2020-10-15 00:06:03,205 INFO L480 AbstractCegarLoop]: Interpolant automaton has 38 states. [2020-10-15 00:06:03,205 INFO L276 IsEmpty]: Start isEmpty. Operand 287 states and 322 transitions. [2020-10-15 00:06:03,207 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-10-15 00:06:03,207 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 00:06:03,207 INFO L422 BasicCegarLoop]: trace histogram [36, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 00:06:03,207 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2020-10-15 00:06:03,207 INFO L427 AbstractCegarLoop]: === Iteration 44 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 00:06:03,207 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 00:06:03,208 INFO L82 PathProgramCache]: Analyzing trace with hash -1644144086, now seen corresponding path program 36 times [2020-10-15 00:06:03,208 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 00:06:03,208 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1492877014] [2020-10-15 00:06:03,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 00:06:03,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:06:03,225 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:06:04,155 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:06:05,311 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:06:05,311 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 56 [2020-10-15 00:06:05,311 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-15 00:06:05,311 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2092 [2020-10-15 00:06:05,311 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:06:05,311 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:06:05,311 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 38 [2020-10-15 00:06:05,312 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-15 00:06:05,312 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 38 [2020-10-15 00:06:05,312 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:06:06,447 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 00:06:06,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:06:06,448 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:06:06,449 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:06:06,449 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-15 00:06:06,449 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:06:06,449 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-15 00:06:06,449 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:06:06,449 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:06:06,450 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 00:06:06,450 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 00:06:06,450 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 00:06:06,450 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:06:06,453 INFO L134 CoverageAnalysis]: Checked inductivity of 666 backedges. 0 proven. 666 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 00:06:06,454 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1492877014] [2020-10-15 00:06:06,454 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-15 00:06:06,454 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39] total 39 [2020-10-15 00:06:06,454 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2009707068] [2020-10-15 00:06:06,454 INFO L459 AbstractCegarLoop]: Interpolant automaton has 39 states [2020-10-15 00:06:06,454 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 00:06:06,454 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2020-10-15 00:06:06,455 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=1371, Unknown=0, NotChecked=0, Total=1482 [2020-10-15 00:06:06,455 INFO L87 Difference]: Start difference. First operand 287 states and 322 transitions. Second operand 39 states. [2020-10-15 00:06:07,482 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 00:06:07,483 INFO L93 Difference]: Finished difference Result 595 states and 680 transitions. [2020-10-15 00:06:07,483 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-10-15 00:06:07,483 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 48 [2020-10-15 00:06:07,484 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 00:06:07,485 INFO L225 Difference]: With dead ends: 595 [2020-10-15 00:06:07,485 INFO L226 Difference]: Without dead ends: 316 [2020-10-15 00:06:07,487 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=111, Invalid=1371, Unknown=0, NotChecked=0, Total=1482 [2020-10-15 00:06:07,488 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 316 states. [2020-10-15 00:06:07,519 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 316 to 293. [2020-10-15 00:06:07,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 293 states. [2020-10-15 00:06:07,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 293 states to 293 states and 328 transitions. [2020-10-15 00:06:07,521 INFO L78 Accepts]: Start accepts. Automaton has 293 states and 328 transitions. Word has length 48 [2020-10-15 00:06:07,521 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 00:06:07,521 INFO L479 AbstractCegarLoop]: Abstraction has 293 states and 328 transitions. [2020-10-15 00:06:07,521 INFO L480 AbstractCegarLoop]: Interpolant automaton has 39 states. [2020-10-15 00:06:07,522 INFO L276 IsEmpty]: Start isEmpty. Operand 293 states and 328 transitions. [2020-10-15 00:06:07,522 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2020-10-15 00:06:07,523 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 00:06:07,523 INFO L422 BasicCegarLoop]: trace histogram [37, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 00:06:07,523 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2020-10-15 00:06:07,523 INFO L427 AbstractCegarLoop]: === Iteration 45 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 00:06:07,523 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 00:06:07,523 INFO L82 PathProgramCache]: Analyzing trace with hash 597443447, now seen corresponding path program 37 times [2020-10-15 00:06:07,524 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 00:06:07,524 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2127674546] [2020-10-15 00:06:07,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 00:06:07,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:06:07,556 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:06:09,173 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:06:09,173 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 57 [2020-10-15 00:06:09,173 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:06:09,173 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1628 [2020-10-15 00:06:09,174 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:06:09,174 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:06:09,174 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 39 [2020-10-15 00:06:09,174 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-15 00:06:09,174 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 39 [2020-10-15 00:06:09,174 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:06:10,365 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 00:06:10,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:06:10,366 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:06:10,367 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:06:10,367 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-15 00:06:10,367 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:06:10,367 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-15 00:06:10,367 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:06:10,367 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:06:10,367 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 00:06:10,368 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 00:06:10,368 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 00:06:10,368 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:06:10,372 INFO L134 CoverageAnalysis]: Checked inductivity of 703 backedges. 0 proven. 703 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 00:06:10,372 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2127674546] [2020-10-15 00:06:10,372 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-15 00:06:10,372 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40] total 40 [2020-10-15 00:06:10,372 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1507482869] [2020-10-15 00:06:10,373 INFO L459 AbstractCegarLoop]: Interpolant automaton has 40 states [2020-10-15 00:06:10,373 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 00:06:10,373 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2020-10-15 00:06:10,373 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=1446, Unknown=0, NotChecked=0, Total=1560 [2020-10-15 00:06:10,374 INFO L87 Difference]: Start difference. First operand 293 states and 328 transitions. Second operand 40 states. [2020-10-15 00:06:11,428 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 00:06:11,428 INFO L93 Difference]: Finished difference Result 607 states and 692 transitions. [2020-10-15 00:06:11,428 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-10-15 00:06:11,428 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 49 [2020-10-15 00:06:11,429 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 00:06:11,430 INFO L225 Difference]: With dead ends: 607 [2020-10-15 00:06:11,430 INFO L226 Difference]: Without dead ends: 322 [2020-10-15 00:06:11,432 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=114, Invalid=1446, Unknown=0, NotChecked=0, Total=1560 [2020-10-15 00:06:11,433 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 322 states. [2020-10-15 00:06:11,461 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 322 to 299. [2020-10-15 00:06:11,461 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 299 states. [2020-10-15 00:06:11,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 299 states to 299 states and 334 transitions. [2020-10-15 00:06:11,463 INFO L78 Accepts]: Start accepts. Automaton has 299 states and 334 transitions. Word has length 49 [2020-10-15 00:06:11,463 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 00:06:11,463 INFO L479 AbstractCegarLoop]: Abstraction has 299 states and 334 transitions. [2020-10-15 00:06:11,463 INFO L480 AbstractCegarLoop]: Interpolant automaton has 40 states. [2020-10-15 00:06:11,464 INFO L276 IsEmpty]: Start isEmpty. Operand 299 states and 334 transitions. [2020-10-15 00:06:11,464 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2020-10-15 00:06:11,464 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 00:06:11,465 INFO L422 BasicCegarLoop]: trace histogram [38, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 00:06:11,465 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2020-10-15 00:06:11,465 INFO L427 AbstractCegarLoop]: === Iteration 46 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 00:06:11,465 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 00:06:11,465 INFO L82 PathProgramCache]: Analyzing trace with hash 1367180234, now seen corresponding path program 38 times [2020-10-15 00:06:11,465 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 00:06:11,466 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1519034213] [2020-10-15 00:06:11,466 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 00:06:11,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:06:11,487 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:06:12,588 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:06:12,589 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 58 [2020-10-15 00:06:12,589 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:06:12,589 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1108 [2020-10-15 00:06:12,589 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:06:12,589 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:06:12,589 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 40 [2020-10-15 00:06:12,589 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-15 00:06:12,589 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 40 [2020-10-15 00:06:12,589 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:06:13,875 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 00:06:13,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:06:13,876 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:06:13,876 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:06:13,877 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-15 00:06:13,877 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:06:13,877 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-15 00:06:13,877 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:06:13,877 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:06:13,877 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 00:06:13,877 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 00:06:13,878 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 00:06:13,878 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:06:13,883 INFO L134 CoverageAnalysis]: Checked inductivity of 741 backedges. 0 proven. 741 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 00:06:13,883 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1519034213] [2020-10-15 00:06:13,883 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-15 00:06:13,883 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41] total 41 [2020-10-15 00:06:13,883 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1687692249] [2020-10-15 00:06:13,883 INFO L459 AbstractCegarLoop]: Interpolant automaton has 41 states [2020-10-15 00:06:13,884 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 00:06:13,884 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2020-10-15 00:06:13,884 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=1523, Unknown=0, NotChecked=0, Total=1640 [2020-10-15 00:06:13,884 INFO L87 Difference]: Start difference. First operand 299 states and 334 transitions. Second operand 41 states. [2020-10-15 00:06:14,980 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 00:06:14,980 INFO L93 Difference]: Finished difference Result 619 states and 704 transitions. [2020-10-15 00:06:14,985 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2020-10-15 00:06:14,985 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 50 [2020-10-15 00:06:14,986 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 00:06:14,987 INFO L225 Difference]: With dead ends: 619 [2020-10-15 00:06:14,988 INFO L226 Difference]: Without dead ends: 328 [2020-10-15 00:06:14,989 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=117, Invalid=1523, Unknown=0, NotChecked=0, Total=1640 [2020-10-15 00:06:14,990 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 328 states. [2020-10-15 00:06:15,015 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 328 to 305. [2020-10-15 00:06:15,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 305 states. [2020-10-15 00:06:15,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 305 states to 305 states and 340 transitions. [2020-10-15 00:06:15,017 INFO L78 Accepts]: Start accepts. Automaton has 305 states and 340 transitions. Word has length 50 [2020-10-15 00:06:15,017 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 00:06:15,017 INFO L479 AbstractCegarLoop]: Abstraction has 305 states and 340 transitions. [2020-10-15 00:06:15,017 INFO L480 AbstractCegarLoop]: Interpolant automaton has 41 states. [2020-10-15 00:06:15,017 INFO L276 IsEmpty]: Start isEmpty. Operand 305 states and 340 transitions. [2020-10-15 00:06:15,018 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-10-15 00:06:15,018 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 00:06:15,018 INFO L422 BasicCegarLoop]: trace histogram [39, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 00:06:15,018 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2020-10-15 00:06:15,018 INFO L427 AbstractCegarLoop]: === Iteration 47 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 00:06:15,018 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 00:06:15,018 INFO L82 PathProgramCache]: Analyzing trace with hash -540783145, now seen corresponding path program 39 times [2020-10-15 00:06:15,019 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 00:06:15,019 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2078387678] [2020-10-15 00:06:15,019 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 00:06:15,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:06:15,039 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:06:16,461 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:06:16,462 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 59 [2020-10-15 00:06:16,462 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:06:16,462 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1430 [2020-10-15 00:06:16,462 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:06:16,463 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:06:16,463 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 41 [2020-10-15 00:06:16,463 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-15 00:06:16,463 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 41 [2020-10-15 00:06:16,463 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-15 00:06:17,751 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 00:06:17,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:06:17,751 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:06:17,752 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:06:17,752 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-15 00:06:17,752 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:06:17,752 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-15 00:06:17,753 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:06:17,753 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:06:17,753 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 00:06:17,753 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 00:06:17,753 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 00:06:17,753 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:06:17,757 INFO L134 CoverageAnalysis]: Checked inductivity of 780 backedges. 0 proven. 780 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 00:06:17,757 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2078387678] [2020-10-15 00:06:17,758 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-15 00:06:17,758 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42] total 42 [2020-10-15 00:06:17,758 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1243705507] [2020-10-15 00:06:17,758 INFO L459 AbstractCegarLoop]: Interpolant automaton has 42 states [2020-10-15 00:06:17,758 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 00:06:17,758 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2020-10-15 00:06:17,759 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=1602, Unknown=0, NotChecked=0, Total=1722 [2020-10-15 00:06:17,759 INFO L87 Difference]: Start difference. First operand 305 states and 340 transitions. Second operand 42 states. [2020-10-15 00:06:18,885 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 00:06:18,885 INFO L93 Difference]: Finished difference Result 631 states and 716 transitions. [2020-10-15 00:06:18,886 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2020-10-15 00:06:18,886 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 51 [2020-10-15 00:06:18,886 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 00:06:18,887 INFO L225 Difference]: With dead ends: 631 [2020-10-15 00:06:18,887 INFO L226 Difference]: Without dead ends: 334 [2020-10-15 00:06:18,889 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=120, Invalid=1602, Unknown=0, NotChecked=0, Total=1722 [2020-10-15 00:06:18,889 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 334 states. [2020-10-15 00:06:18,918 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 334 to 311. [2020-10-15 00:06:18,918 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 311 states. [2020-10-15 00:06:18,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 311 states to 311 states and 346 transitions. [2020-10-15 00:06:18,920 INFO L78 Accepts]: Start accepts. Automaton has 311 states and 346 transitions. Word has length 51 [2020-10-15 00:06:18,920 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 00:06:18,920 INFO L479 AbstractCegarLoop]: Abstraction has 311 states and 346 transitions. [2020-10-15 00:06:18,920 INFO L480 AbstractCegarLoop]: Interpolant automaton has 42 states. [2020-10-15 00:06:18,920 INFO L276 IsEmpty]: Start isEmpty. Operand 311 states and 346 transitions. [2020-10-15 00:06:18,921 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-10-15 00:06:18,921 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 00:06:18,921 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 00:06:18,922 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2020-10-15 00:06:18,922 INFO L427 AbstractCegarLoop]: === Iteration 48 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 00:06:18,922 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 00:06:18,922 INFO L82 PathProgramCache]: Analyzing trace with hash 27255203, now seen corresponding path program 6 times [2020-10-15 00:06:18,922 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 00:06:18,922 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [645830819] [2020-10-15 00:06:18,923 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 00:06:18,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:06:18,928 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:06:18,932 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:06:18,942 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:06:18,953 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:06:18,963 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:06:19,050 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:06:19,763 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:06:19,980 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:06:23,930 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:06:23,930 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 78 [2020-10-15 00:06:23,931 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-15 00:06:23,931 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-15 00:06:23,931 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:06:23,931 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:06:23,931 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-15 00:06:23,931 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-15 00:06:23,931 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 62 [2020-10-15 00:06:23,932 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:06:24,020 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 00:06:24,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:06:24,022 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:06:24,023 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:06:24,023 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-15 00:06:24,023 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:06:24,023 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-15 00:06:24,023 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:06:24,023 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:06:24,023 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 00:06:24,024 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 00:06:24,024 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 00:06:24,024 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:06:24,024 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-15 00:06:24,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:06:24,026 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:06:24,028 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:06:24,029 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-15 00:06:24,029 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:06:24,029 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-15 00:06:24,029 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:06:24,029 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:06:24,029 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-15 00:06:24,029 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 00:06:24,030 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-15 00:06:24,030 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:06:24,031 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-10-15 00:06:24,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:06:24,032 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:06:24,035 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:06:24,035 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-15 00:06:24,035 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:06:24,035 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-15 00:06:24,035 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:06:24,035 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:06:24,035 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-15 00:06:24,035 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 00:06:24,036 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-15 00:06:24,036 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:06:24,036 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-10-15 00:06:24,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:06:24,038 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:06:24,040 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:06:24,040 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-15 00:06:24,040 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:06:24,040 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-15 00:06:24,040 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:06:24,040 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:06:24,040 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-15 00:06:24,041 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 00:06:24,041 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-15 00:06:24,041 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:06:24,042 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2020-10-15 00:06:24,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:06:24,043 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:06:24,045 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:06:24,045 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-15 00:06:24,045 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:06:24,045 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-15 00:06:24,045 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:06:24,045 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:06:24,045 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-15 00:06:24,045 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 00:06:24,046 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-15 00:06:24,046 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:06:24,047 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2020-10-15 00:06:24,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:06:24,048 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:06:24,050 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:06:24,050 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-15 00:06:24,050 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:06:24,051 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-15 00:06:24,051 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:06:24,051 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:06:24,051 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-15 00:06:24,051 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 00:06:24,051 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-15 00:06:24,051 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:06:24,052 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2020-10-15 00:06:24,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:06:24,054 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:06:24,055 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:06:24,056 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-15 00:06:24,056 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:06:24,056 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-15 00:06:24,056 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:06:24,056 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:06:24,056 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-15 00:06:24,056 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 00:06:24,056 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-15 00:06:24,057 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:06:24,060 INFO L134 CoverageAnalysis]: Checked inductivity of 138 backedges. 12 proven. 66 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2020-10-15 00:06:24,060 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [645830819] [2020-10-15 00:06:24,060 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-15 00:06:24,060 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-15 00:06:24,060 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [558452500] [2020-10-15 00:06:24,061 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-15 00:06:24,061 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 00:06:24,061 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-15 00:06:24,061 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2020-10-15 00:06:24,061 INFO L87 Difference]: Start difference. First operand 311 states and 346 transitions. Second operand 9 states. [2020-10-15 00:06:24,261 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 00:06:24,261 INFO L93 Difference]: Finished difference Result 415 states and 462 transitions. [2020-10-15 00:06:24,262 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-15 00:06:24,262 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 58 [2020-10-15 00:06:24,262 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 00:06:24,264 INFO L225 Difference]: With dead ends: 415 [2020-10-15 00:06:24,264 INFO L226 Difference]: Without dead ends: 408 [2020-10-15 00:06:24,265 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2020-10-15 00:06:24,265 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 408 states. [2020-10-15 00:06:24,301 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 408 to 360. [2020-10-15 00:06:24,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 360 states. [2020-10-15 00:06:24,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 360 states to 360 states and 401 transitions. [2020-10-15 00:06:24,304 INFO L78 Accepts]: Start accepts. Automaton has 360 states and 401 transitions. Word has length 58 [2020-10-15 00:06:24,304 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 00:06:24,304 INFO L479 AbstractCegarLoop]: Abstraction has 360 states and 401 transitions. [2020-10-15 00:06:24,305 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-15 00:06:24,305 INFO L276 IsEmpty]: Start isEmpty. Operand 360 states and 401 transitions. [2020-10-15 00:06:24,306 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-10-15 00:06:24,306 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 00:06:24,307 INFO L422 BasicCegarLoop]: trace histogram [40, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 00:06:24,307 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2020-10-15 00:06:24,307 INFO L427 AbstractCegarLoop]: === Iteration 49 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 00:06:24,307 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 00:06:24,307 INFO L82 PathProgramCache]: Analyzing trace with hash 441894250, now seen corresponding path program 40 times [2020-10-15 00:06:24,308 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 00:06:24,308 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1080728219] [2020-10-15 00:06:24,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 00:06:24,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:06:24,337 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:06:25,685 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:06:25,877 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:06:25,878 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 60 [2020-10-15 00:06:25,878 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-15 00:06:25,878 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1552 [2020-10-15 00:06:25,878 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:06:25,878 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:06:25,878 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 42 [2020-10-15 00:06:25,878 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-15 00:06:25,878 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 42 [2020-10-15 00:06:25,878 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:06:27,242 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 00:06:27,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:06:27,243 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:06:27,244 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:06:27,244 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-15 00:06:27,245 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:06:27,245 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-15 00:06:27,245 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:06:27,245 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:06:27,245 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 00:06:27,246 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 00:06:27,246 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 00:06:27,246 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-15 00:06:27,251 INFO L134 CoverageAnalysis]: Checked inductivity of 820 backedges. 0 proven. 820 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 00:06:27,251 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1080728219] [2020-10-15 00:06:27,251 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-15 00:06:27,251 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43] total 43 [2020-10-15 00:06:27,251 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [633052966] [2020-10-15 00:06:27,251 INFO L459 AbstractCegarLoop]: Interpolant automaton has 43 states [2020-10-15 00:06:27,252 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 00:06:27,252 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2020-10-15 00:06:27,252 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=1683, Unknown=0, NotChecked=0, Total=1806 [2020-10-15 00:06:27,252 INFO L87 Difference]: Start difference. First operand 360 states and 401 transitions. Second operand 43 states. [2020-10-15 00:06:28,423 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 00:06:28,423 INFO L93 Difference]: Finished difference Result 746 states and 846 transitions. [2020-10-15 00:06:28,424 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2020-10-15 00:06:28,424 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 52 [2020-10-15 00:06:28,424 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 00:06:28,426 INFO L225 Difference]: With dead ends: 746 [2020-10-15 00:06:28,426 INFO L226 Difference]: Without dead ends: 394 [2020-10-15 00:06:28,428 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=123, Invalid=1683, Unknown=0, NotChecked=0, Total=1806 [2020-10-15 00:06:28,429 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 394 states. [2020-10-15 00:06:28,472 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 394 to 367. [2020-10-15 00:06:28,473 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 367 states. [2020-10-15 00:06:28,474 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 367 states to 367 states and 408 transitions. [2020-10-15 00:06:28,474 INFO L78 Accepts]: Start accepts. Automaton has 367 states and 408 transitions. Word has length 52 [2020-10-15 00:06:28,474 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 00:06:28,475 INFO L479 AbstractCegarLoop]: Abstraction has 367 states and 408 transitions. [2020-10-15 00:06:28,475 INFO L480 AbstractCegarLoop]: Interpolant automaton has 43 states. [2020-10-15 00:06:28,475 INFO L276 IsEmpty]: Start isEmpty. Operand 367 states and 408 transitions. [2020-10-15 00:06:28,476 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-10-15 00:06:28,476 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 00:06:28,476 INFO L422 BasicCegarLoop]: trace histogram [41, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 00:06:28,476 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2020-10-15 00:06:28,476 INFO L427 AbstractCegarLoop]: === Iteration 50 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 00:06:28,476 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 00:06:28,477 INFO L82 PathProgramCache]: Analyzing trace with hash 840122423, now seen corresponding path program 41 times [2020-10-15 00:06:28,477 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 00:06:28,477 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1419692034] [2020-10-15 00:06:28,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 00:06:28,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:06:28,502 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:06:29,793 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:06:29,794 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 61 [2020-10-15 00:06:29,794 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:06:29,794 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1302 [2020-10-15 00:06:29,794 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:06:29,794 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:06:29,794 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 43 [2020-10-15 00:06:29,794 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-15 00:06:29,794 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 43 [2020-10-15 00:06:29,795 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:06:31,187 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 00:06:31,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:06:31,188 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:06:31,188 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:06:31,188 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-15 00:06:31,188 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:06:31,188 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-15 00:06:31,189 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:06:31,189 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:06:31,189 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 00:06:31,189 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 00:06:31,189 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 00:06:31,189 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:06:31,193 INFO L134 CoverageAnalysis]: Checked inductivity of 861 backedges. 0 proven. 861 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 00:06:31,193 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1419692034] [2020-10-15 00:06:31,194 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-15 00:06:31,194 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [44] total 44 [2020-10-15 00:06:31,194 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1053198030] [2020-10-15 00:06:31,194 INFO L459 AbstractCegarLoop]: Interpolant automaton has 44 states [2020-10-15 00:06:31,194 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 00:06:31,194 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2020-10-15 00:06:31,195 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=1766, Unknown=0, NotChecked=0, Total=1892 [2020-10-15 00:06:31,195 INFO L87 Difference]: Start difference. First operand 367 states and 408 transitions. Second operand 44 states. [2020-10-15 00:06:32,413 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 00:06:32,413 INFO L93 Difference]: Finished difference Result 760 states and 860 transitions. [2020-10-15 00:06:32,414 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2020-10-15 00:06:32,414 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 53 [2020-10-15 00:06:32,414 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 00:06:32,416 INFO L225 Difference]: With dead ends: 760 [2020-10-15 00:06:32,416 INFO L226 Difference]: Without dead ends: 401 [2020-10-15 00:06:32,417 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=126, Invalid=1766, Unknown=0, NotChecked=0, Total=1892 [2020-10-15 00:06:32,418 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 401 states. [2020-10-15 00:06:32,452 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 401 to 374. [2020-10-15 00:06:32,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 374 states. [2020-10-15 00:06:32,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 374 states to 374 states and 415 transitions. [2020-10-15 00:06:32,454 INFO L78 Accepts]: Start accepts. Automaton has 374 states and 415 transitions. Word has length 53 [2020-10-15 00:06:32,454 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 00:06:32,455 INFO L479 AbstractCegarLoop]: Abstraction has 374 states and 415 transitions. [2020-10-15 00:06:32,455 INFO L480 AbstractCegarLoop]: Interpolant automaton has 44 states. [2020-10-15 00:06:32,455 INFO L276 IsEmpty]: Start isEmpty. Operand 374 states and 415 transitions. [2020-10-15 00:06:32,456 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-10-15 00:06:32,456 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 00:06:32,456 INFO L422 BasicCegarLoop]: trace histogram [42, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 00:06:32,456 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2020-10-15 00:06:32,456 INFO L427 AbstractCegarLoop]: === Iteration 51 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 00:06:32,456 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 00:06:32,457 INFO L82 PathProgramCache]: Analyzing trace with hash 300293898, now seen corresponding path program 42 times [2020-10-15 00:06:32,457 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 00:06:32,457 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1416563652] [2020-10-15 00:06:32,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 00:06:32,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:06:32,483 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:06:34,242 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:06:34,242 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 62 [2020-10-15 00:06:34,243 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:06:34,243 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1770 [2020-10-15 00:06:34,243 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:06:34,243 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:06:34,243 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 44 [2020-10-15 00:06:34,243 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-15 00:06:34,244 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 44 [2020-10-15 00:06:34,244 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:06:35,721 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 00:06:35,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:06:35,722 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:06:35,723 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:06:35,723 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-15 00:06:35,723 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:06:35,723 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-15 00:06:35,723 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:06:35,723 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:06:35,723 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 00:06:35,724 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 00:06:35,724 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 00:06:35,724 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:06:35,728 INFO L134 CoverageAnalysis]: Checked inductivity of 903 backedges. 0 proven. 903 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 00:06:35,728 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1416563652] [2020-10-15 00:06:35,728 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-15 00:06:35,728 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [45] total 45 [2020-10-15 00:06:35,728 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [206357317] [2020-10-15 00:06:35,729 INFO L459 AbstractCegarLoop]: Interpolant automaton has 45 states [2020-10-15 00:06:35,729 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 00:06:35,729 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2020-10-15 00:06:35,730 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=1851, Unknown=0, NotChecked=0, Total=1980 [2020-10-15 00:06:35,730 INFO L87 Difference]: Start difference. First operand 374 states and 415 transitions. Second operand 45 states. [2020-10-15 00:06:37,029 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 00:06:37,030 INFO L93 Difference]: Finished difference Result 774 states and 874 transitions. [2020-10-15 00:06:37,030 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2020-10-15 00:06:37,030 INFO L78 Accepts]: Start accepts. Automaton has 45 states. Word has length 54 [2020-10-15 00:06:37,030 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 00:06:37,032 INFO L225 Difference]: With dead ends: 774 [2020-10-15 00:06:37,032 INFO L226 Difference]: Without dead ends: 408 [2020-10-15 00:06:37,034 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=129, Invalid=1851, Unknown=0, NotChecked=0, Total=1980 [2020-10-15 00:06:37,034 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 408 states. [2020-10-15 00:06:37,078 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 408 to 381. [2020-10-15 00:06:37,078 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 381 states. [2020-10-15 00:06:37,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 381 states to 381 states and 422 transitions. [2020-10-15 00:06:37,082 INFO L78 Accepts]: Start accepts. Automaton has 381 states and 422 transitions. Word has length 54 [2020-10-15 00:06:37,082 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 00:06:37,083 INFO L479 AbstractCegarLoop]: Abstraction has 381 states and 422 transitions. [2020-10-15 00:06:37,083 INFO L480 AbstractCegarLoop]: Interpolant automaton has 45 states. [2020-10-15 00:06:37,084 INFO L276 IsEmpty]: Start isEmpty. Operand 381 states and 422 transitions. [2020-10-15 00:06:37,086 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-10-15 00:06:37,086 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 00:06:37,087 INFO L422 BasicCegarLoop]: trace histogram [43, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 00:06:37,087 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2020-10-15 00:06:37,087 INFO L427 AbstractCegarLoop]: === Iteration 52 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 00:06:37,087 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 00:06:37,087 INFO L82 PathProgramCache]: Analyzing trace with hash 745478807, now seen corresponding path program 43 times [2020-10-15 00:06:37,087 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 00:06:37,088 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1395667920] [2020-10-15 00:06:37,088 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 00:06:37,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:06:37,113 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:06:38,883 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:06:38,884 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 63 [2020-10-15 00:06:38,884 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:06:38,884 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1781 [2020-10-15 00:06:38,884 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:06:38,884 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:06:38,884 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 45 [2020-10-15 00:06:38,884 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-15 00:06:38,884 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 45 [2020-10-15 00:06:38,885 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:06:40,420 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 00:06:40,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:06:40,421 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:06:40,422 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:06:40,422 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-15 00:06:40,422 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:06:40,422 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-15 00:06:40,422 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:06:40,423 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:06:40,423 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 00:06:40,423 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 00:06:40,423 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 00:06:40,424 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-15 00:06:40,428 INFO L134 CoverageAnalysis]: Checked inductivity of 946 backedges. 0 proven. 946 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 00:06:40,428 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1395667920] [2020-10-15 00:06:40,428 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-15 00:06:40,428 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [46] total 46 [2020-10-15 00:06:40,429 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1624927595] [2020-10-15 00:06:40,429 INFO L459 AbstractCegarLoop]: Interpolant automaton has 46 states [2020-10-15 00:06:40,429 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 00:06:40,429 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2020-10-15 00:06:40,430 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=1938, Unknown=0, NotChecked=0, Total=2070 [2020-10-15 00:06:40,430 INFO L87 Difference]: Start difference. First operand 381 states and 422 transitions. Second operand 46 states. [2020-10-15 00:06:41,758 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 00:06:41,758 INFO L93 Difference]: Finished difference Result 788 states and 888 transitions. [2020-10-15 00:06:41,759 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2020-10-15 00:06:41,759 INFO L78 Accepts]: Start accepts. Automaton has 46 states. Word has length 55 [2020-10-15 00:06:41,759 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 00:06:41,761 INFO L225 Difference]: With dead ends: 788 [2020-10-15 00:06:41,761 INFO L226 Difference]: Without dead ends: 415 [2020-10-15 00:06:41,762 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=132, Invalid=1938, Unknown=0, NotChecked=0, Total=2070 [2020-10-15 00:06:41,763 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 415 states. [2020-10-15 00:06:41,802 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 415 to 388. [2020-10-15 00:06:41,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 388 states. [2020-10-15 00:06:41,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 388 states to 388 states and 429 transitions. [2020-10-15 00:06:41,804 INFO L78 Accepts]: Start accepts. Automaton has 388 states and 429 transitions. Word has length 55 [2020-10-15 00:06:41,804 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 00:06:41,804 INFO L479 AbstractCegarLoop]: Abstraction has 388 states and 429 transitions. [2020-10-15 00:06:41,804 INFO L480 AbstractCegarLoop]: Interpolant automaton has 46 states. [2020-10-15 00:06:41,804 INFO L276 IsEmpty]: Start isEmpty. Operand 388 states and 429 transitions. [2020-10-15 00:06:41,805 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-10-15 00:06:41,805 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 00:06:41,806 INFO L422 BasicCegarLoop]: trace histogram [44, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 00:06:41,806 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2020-10-15 00:06:41,806 INFO L427 AbstractCegarLoop]: === Iteration 53 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 00:06:41,806 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 00:06:41,806 INFO L82 PathProgramCache]: Analyzing trace with hash 1661309098, now seen corresponding path program 44 times [2020-10-15 00:06:41,806 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 00:06:41,806 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [50184614] [2020-10-15 00:06:41,807 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 00:06:41,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:06:41,830 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:06:43,825 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:06:45,115 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:06:45,115 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 64 [2020-10-15 00:06:45,115 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-15 00:06:45,116 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3294 [2020-10-15 00:06:45,116 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:06:45,116 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:06:45,116 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 46 [2020-10-15 00:06:45,116 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-15 00:06:45,116 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 46 [2020-10-15 00:06:45,116 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:06:46,702 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 00:06:46,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:06:46,704 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:06:46,704 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:06:46,705 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-15 00:06:46,705 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:06:46,705 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-15 00:06:46,705 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:06:46,706 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:06:46,706 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 00:06:46,706 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 00:06:46,706 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 00:06:46,706 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:06:46,712 INFO L134 CoverageAnalysis]: Checked inductivity of 990 backedges. 0 proven. 990 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 00:06:46,712 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [50184614] [2020-10-15 00:06:46,712 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-15 00:06:46,713 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [47] total 47 [2020-10-15 00:06:46,713 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1966664719] [2020-10-15 00:06:46,713 INFO L459 AbstractCegarLoop]: Interpolant automaton has 47 states [2020-10-15 00:06:46,713 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 00:06:46,714 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2020-10-15 00:06:46,714 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=135, Invalid=2027, Unknown=0, NotChecked=0, Total=2162 [2020-10-15 00:06:46,714 INFO L87 Difference]: Start difference. First operand 388 states and 429 transitions. Second operand 47 states. [2020-10-15 00:06:48,053 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 00:06:48,054 INFO L93 Difference]: Finished difference Result 802 states and 902 transitions. [2020-10-15 00:06:48,054 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2020-10-15 00:06:48,054 INFO L78 Accepts]: Start accepts. Automaton has 47 states. Word has length 56 [2020-10-15 00:06:48,054 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 00:06:48,056 INFO L225 Difference]: With dead ends: 802 [2020-10-15 00:06:48,056 INFO L226 Difference]: Without dead ends: 422 [2020-10-15 00:06:48,057 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=135, Invalid=2027, Unknown=0, NotChecked=0, Total=2162 [2020-10-15 00:06:48,058 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 422 states. [2020-10-15 00:06:48,090 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 422 to 395. [2020-10-15 00:06:48,090 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 395 states. [2020-10-15 00:06:48,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 395 states to 395 states and 436 transitions. [2020-10-15 00:06:48,091 INFO L78 Accepts]: Start accepts. Automaton has 395 states and 436 transitions. Word has length 56 [2020-10-15 00:06:48,091 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 00:06:48,091 INFO L479 AbstractCegarLoop]: Abstraction has 395 states and 436 transitions. [2020-10-15 00:06:48,091 INFO L480 AbstractCegarLoop]: Interpolant automaton has 47 states. [2020-10-15 00:06:48,091 INFO L276 IsEmpty]: Start isEmpty. Operand 395 states and 436 transitions. [2020-10-15 00:06:48,092 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-10-15 00:06:48,092 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 00:06:48,092 INFO L422 BasicCegarLoop]: trace histogram [45, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 00:06:48,092 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2020-10-15 00:06:48,092 INFO L427 AbstractCegarLoop]: === Iteration 54 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 00:06:48,093 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 00:06:48,093 INFO L82 PathProgramCache]: Analyzing trace with hash -12722953, now seen corresponding path program 45 times [2020-10-15 00:06:48,093 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 00:06:48,093 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [227908823] [2020-10-15 00:06:48,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 00:06:48,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:06:48,120 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:06:50,322 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:06:50,323 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 65 [2020-10-15 00:06:50,323 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:06:50,323 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2215 [2020-10-15 00:06:50,323 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:06:50,323 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:06:50,323 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 47 [2020-10-15 00:06:50,324 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-15 00:06:50,324 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 47 [2020-10-15 00:06:50,324 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:06:51,976 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 00:06:51,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:06:51,978 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:06:51,978 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:06:51,979 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-15 00:06:51,979 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:06:51,979 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-15 00:06:51,979 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:06:51,980 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:06:51,980 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 00:06:51,980 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 00:06:51,980 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 00:06:51,980 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-15 00:06:51,985 INFO L134 CoverageAnalysis]: Checked inductivity of 1035 backedges. 0 proven. 1035 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 00:06:51,985 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [227908823] [2020-10-15 00:06:51,986 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-15 00:06:51,986 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [48] total 48 [2020-10-15 00:06:51,986 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1838466589] [2020-10-15 00:06:51,986 INFO L459 AbstractCegarLoop]: Interpolant automaton has 48 states [2020-10-15 00:06:51,986 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 00:06:51,987 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2020-10-15 00:06:51,987 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=2118, Unknown=0, NotChecked=0, Total=2256 [2020-10-15 00:06:51,987 INFO L87 Difference]: Start difference. First operand 395 states and 436 transitions. Second operand 48 states. [2020-10-15 00:06:53,377 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 00:06:53,377 INFO L93 Difference]: Finished difference Result 816 states and 916 transitions. [2020-10-15 00:06:53,377 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2020-10-15 00:06:53,377 INFO L78 Accepts]: Start accepts. Automaton has 48 states. Word has length 57 [2020-10-15 00:06:53,378 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 00:06:53,379 INFO L225 Difference]: With dead ends: 816 [2020-10-15 00:06:53,379 INFO L226 Difference]: Without dead ends: 429 [2020-10-15 00:06:53,380 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=138, Invalid=2118, Unknown=0, NotChecked=0, Total=2256 [2020-10-15 00:06:53,380 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 429 states. [2020-10-15 00:06:53,419 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 429 to 402. [2020-10-15 00:06:53,420 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 402 states. [2020-10-15 00:06:53,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 402 states to 402 states and 443 transitions. [2020-10-15 00:06:53,421 INFO L78 Accepts]: Start accepts. Automaton has 402 states and 443 transitions. Word has length 57 [2020-10-15 00:06:53,421 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 00:06:53,421 INFO L479 AbstractCegarLoop]: Abstraction has 402 states and 443 transitions. [2020-10-15 00:06:53,421 INFO L480 AbstractCegarLoop]: Interpolant automaton has 48 states. [2020-10-15 00:06:53,421 INFO L276 IsEmpty]: Start isEmpty. Operand 402 states and 443 transitions. [2020-10-15 00:06:53,422 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-10-15 00:06:53,423 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 00:06:53,423 INFO L422 BasicCegarLoop]: trace histogram [46, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 00:06:53,423 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2020-10-15 00:06:53,423 INFO L427 AbstractCegarLoop]: === Iteration 55 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 00:06:53,423 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 00:06:53,423 INFO L82 PathProgramCache]: Analyzing trace with hash -368108982, now seen corresponding path program 46 times [2020-10-15 00:06:53,424 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 00:06:53,424 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [638558687] [2020-10-15 00:06:53,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 00:06:53,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:06:53,453 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:06:56,034 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:06:56,034 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 66 [2020-10-15 00:06:56,034 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:06:56,035 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2593 [2020-10-15 00:06:56,035 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:06:56,035 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:06:56,035 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 48 [2020-10-15 00:06:56,035 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-15 00:06:56,035 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 48 [2020-10-15 00:06:56,036 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:06:57,781 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 00:06:57,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:06:57,782 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:06:57,782 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:06:57,783 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-15 00:06:57,783 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:06:57,783 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-15 00:06:57,784 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:06:57,784 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:06:57,784 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 00:06:57,784 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 00:06:57,784 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 00:06:57,784 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:06:57,789 INFO L134 CoverageAnalysis]: Checked inductivity of 1081 backedges. 0 proven. 1081 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 00:06:57,789 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [638558687] [2020-10-15 00:06:57,789 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-15 00:06:57,789 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [49] total 49 [2020-10-15 00:06:57,790 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1182350477] [2020-10-15 00:06:57,790 INFO L459 AbstractCegarLoop]: Interpolant automaton has 49 states [2020-10-15 00:06:57,790 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 00:06:57,790 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2020-10-15 00:06:57,791 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=141, Invalid=2211, Unknown=0, NotChecked=0, Total=2352 [2020-10-15 00:06:57,791 INFO L87 Difference]: Start difference. First operand 402 states and 443 transitions. Second operand 49 states. [2020-10-15 00:06:59,210 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 00:06:59,210 INFO L93 Difference]: Finished difference Result 830 states and 930 transitions. [2020-10-15 00:06:59,211 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2020-10-15 00:06:59,211 INFO L78 Accepts]: Start accepts. Automaton has 49 states. Word has length 58 [2020-10-15 00:06:59,211 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 00:06:59,212 INFO L225 Difference]: With dead ends: 830 [2020-10-15 00:06:59,212 INFO L226 Difference]: Without dead ends: 436 [2020-10-15 00:06:59,213 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=141, Invalid=2211, Unknown=0, NotChecked=0, Total=2352 [2020-10-15 00:06:59,214 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 436 states. [2020-10-15 00:06:59,252 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 436 to 409. [2020-10-15 00:06:59,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 409 states. [2020-10-15 00:06:59,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 409 states to 409 states and 450 transitions. [2020-10-15 00:06:59,253 INFO L78 Accepts]: Start accepts. Automaton has 409 states and 450 transitions. Word has length 58 [2020-10-15 00:06:59,254 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 00:06:59,254 INFO L479 AbstractCegarLoop]: Abstraction has 409 states and 450 transitions. [2020-10-15 00:06:59,254 INFO L480 AbstractCegarLoop]: Interpolant automaton has 49 states. [2020-10-15 00:06:59,254 INFO L276 IsEmpty]: Start isEmpty. Operand 409 states and 450 transitions. [2020-10-15 00:06:59,255 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-10-15 00:06:59,255 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 00:06:59,255 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 00:06:59,255 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2020-10-15 00:06:59,255 INFO L427 AbstractCegarLoop]: === Iteration 56 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 00:06:59,256 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 00:06:59,256 INFO L82 PathProgramCache]: Analyzing trace with hash 693857380, now seen corresponding path program 7 times [2020-10-15 00:06:59,256 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 00:06:59,256 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1858900627] [2020-10-15 00:06:59,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 00:06:59,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:06:59,262 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:06:59,266 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:06:59,278 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:06:59,290 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:06:59,301 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:06:59,357 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:06:59,497 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:07:00,997 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:07:04,267 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:07:04,267 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 88 [2020-10-15 00:07:04,267 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-15 00:07:04,267 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5006 [2020-10-15 00:07:04,267 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:07:04,267 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:07:04,267 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-15 00:07:04,268 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-15 00:07:04,268 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 72 [2020-10-15 00:07:04,268 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:07:04,368 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 00:07:04,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:07:04,369 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:07:04,370 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:07:04,370 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-15 00:07:04,371 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:07:04,371 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-15 00:07:04,371 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:07:04,372 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:07:04,372 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 00:07:04,372 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 00:07:04,372 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 00:07:04,372 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-15 00:07:04,373 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-15 00:07:04,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:07:04,375 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:07:04,378 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:07:04,379 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-15 00:07:04,379 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:07:04,379 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-15 00:07:04,379 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:07:04,379 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:07:04,380 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-15 00:07:04,380 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 00:07:04,380 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-15 00:07:04,380 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:07:04,381 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-10-15 00:07:04,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:07:04,384 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:07:04,386 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:07:04,387 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-15 00:07:04,387 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:07:04,387 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-15 00:07:04,387 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:07:04,387 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:07:04,387 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-15 00:07:04,387 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 00:07:04,387 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-15 00:07:04,387 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:07:04,389 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-10-15 00:07:04,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:07:04,391 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:07:04,393 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:07:04,394 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-15 00:07:04,394 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:07:04,394 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-15 00:07:04,394 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:07:04,394 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:07:04,394 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-15 00:07:04,394 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 00:07:04,394 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-15 00:07:04,395 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:07:04,396 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2020-10-15 00:07:04,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:07:04,397 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:07:04,399 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:07:04,399 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-15 00:07:04,399 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:07:04,399 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-15 00:07:04,399 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:07:04,400 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:07:04,400 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-15 00:07:04,400 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 00:07:04,400 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-15 00:07:04,400 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:07:04,401 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2020-10-15 00:07:04,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:07:04,402 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:07:04,404 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:07:04,404 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-15 00:07:04,405 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:07:04,405 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-15 00:07:04,405 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:07:04,405 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:07:04,405 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-15 00:07:04,405 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 00:07:04,405 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-15 00:07:04,405 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:07:04,406 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2020-10-15 00:07:04,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:07:04,408 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:07:04,410 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:07:04,410 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-15 00:07:04,410 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:07:04,410 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-15 00:07:04,410 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:07:04,410 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:07:04,410 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-15 00:07:04,411 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 00:07:04,411 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-15 00:07:04,411 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:07:04,412 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2020-10-15 00:07:04,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:07:04,413 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:07:04,415 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:07:04,415 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-15 00:07:04,415 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:07:04,415 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-15 00:07:04,416 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:07:04,416 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:07:04,416 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-15 00:07:04,416 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 00:07:04,416 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-15 00:07:04,416 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:07:04,420 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 14 proven. 91 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2020-10-15 00:07:04,420 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1858900627] [2020-10-15 00:07:04,420 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-15 00:07:04,420 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-15 00:07:04,421 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [554139906] [2020-10-15 00:07:04,421 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-15 00:07:04,421 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 00:07:04,421 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-15 00:07:04,421 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2020-10-15 00:07:04,422 INFO L87 Difference]: Start difference. First operand 409 states and 450 transitions. Second operand 10 states. [2020-10-15 00:07:04,649 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 00:07:04,649 INFO L93 Difference]: Finished difference Result 527 states and 580 transitions. [2020-10-15 00:07:04,650 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-15 00:07:04,650 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 66 [2020-10-15 00:07:04,651 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 00:07:04,653 INFO L225 Difference]: With dead ends: 527 [2020-10-15 00:07:04,654 INFO L226 Difference]: Without dead ends: 520 [2020-10-15 00:07:04,654 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2020-10-15 00:07:04,654 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 520 states. [2020-10-15 00:07:04,701 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 520 to 465. [2020-10-15 00:07:04,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 465 states. [2020-10-15 00:07:04,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 465 states to 465 states and 512 transitions. [2020-10-15 00:07:04,702 INFO L78 Accepts]: Start accepts. Automaton has 465 states and 512 transitions. Word has length 66 [2020-10-15 00:07:04,703 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 00:07:04,703 INFO L479 AbstractCegarLoop]: Abstraction has 465 states and 512 transitions. [2020-10-15 00:07:04,703 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-15 00:07:04,703 INFO L276 IsEmpty]: Start isEmpty. Operand 465 states and 512 transitions. [2020-10-15 00:07:04,704 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2020-10-15 00:07:04,704 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 00:07:04,704 INFO L422 BasicCegarLoop]: trace histogram [47, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 00:07:04,704 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2020-10-15 00:07:04,705 INFO L427 AbstractCegarLoop]: === Iteration 57 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 00:07:04,705 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 00:07:04,705 INFO L82 PathProgramCache]: Analyzing trace with hash 1499826007, now seen corresponding path program 47 times [2020-10-15 00:07:04,705 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 00:07:04,705 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2037510988] [2020-10-15 00:07:04,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 00:07:04,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:07:04,735 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:07:06,867 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:07:06,868 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 67 [2020-10-15 00:07:06,868 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:07:06,868 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2142 [2020-10-15 00:07:06,868 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:07:06,868 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:07:06,868 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 49 [2020-10-15 00:07:06,868 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-15 00:07:06,869 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 49 [2020-10-15 00:07:06,869 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:07:08,755 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 00:07:08,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:07:08,757 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:07:08,758 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:07:08,758 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-15 00:07:08,758 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:07:08,758 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-15 00:07:08,758 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:07:08,758 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:07:08,759 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 00:07:08,759 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 00:07:08,759 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 00:07:08,759 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:07:08,764 INFO L134 CoverageAnalysis]: Checked inductivity of 1128 backedges. 0 proven. 1128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 00:07:08,764 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2037510988] [2020-10-15 00:07:08,764 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-15 00:07:08,765 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [50] total 50 [2020-10-15 00:07:08,765 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [460396682] [2020-10-15 00:07:08,765 INFO L459 AbstractCegarLoop]: Interpolant automaton has 50 states [2020-10-15 00:07:08,765 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 00:07:08,765 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2020-10-15 00:07:08,766 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=144, Invalid=2306, Unknown=0, NotChecked=0, Total=2450 [2020-10-15 00:07:08,766 INFO L87 Difference]: Start difference. First operand 465 states and 512 transitions. Second operand 50 states. [2020-10-15 00:07:10,321 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 00:07:10,322 INFO L93 Difference]: Finished difference Result 961 states and 1076 transitions. [2020-10-15 00:07:10,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2020-10-15 00:07:10,325 INFO L78 Accepts]: Start accepts. Automaton has 50 states. Word has length 59 [2020-10-15 00:07:10,325 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 00:07:10,327 INFO L225 Difference]: With dead ends: 961 [2020-10-15 00:07:10,330 INFO L226 Difference]: Without dead ends: 504 [2020-10-15 00:07:10,332 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=144, Invalid=2306, Unknown=0, NotChecked=0, Total=2450 [2020-10-15 00:07:10,332 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 504 states. [2020-10-15 00:07:10,382 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 504 to 473. [2020-10-15 00:07:10,382 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 473 states. [2020-10-15 00:07:10,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 473 states to 473 states and 520 transitions. [2020-10-15 00:07:10,385 INFO L78 Accepts]: Start accepts. Automaton has 473 states and 520 transitions. Word has length 59 [2020-10-15 00:07:10,386 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 00:07:10,386 INFO L479 AbstractCegarLoop]: Abstraction has 473 states and 520 transitions. [2020-10-15 00:07:10,386 INFO L480 AbstractCegarLoop]: Interpolant automaton has 50 states. [2020-10-15 00:07:10,386 INFO L276 IsEmpty]: Start isEmpty. Operand 473 states and 520 transitions. [2020-10-15 00:07:10,389 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2020-10-15 00:07:10,389 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 00:07:10,390 INFO L422 BasicCegarLoop]: trace histogram [48, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 00:07:10,394 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2020-10-15 00:07:10,394 INFO L427 AbstractCegarLoop]: === Iteration 58 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 00:07:10,395 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 00:07:10,395 INFO L82 PathProgramCache]: Analyzing trace with hash -723731478, now seen corresponding path program 48 times [2020-10-15 00:07:10,395 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 00:07:10,396 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1383929119] [2020-10-15 00:07:10,403 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 00:07:10,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:07:10,454 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:07:11,394 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:07:15,045 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:07:15,046 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 68 [2020-10-15 00:07:15,046 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-15 00:07:15,046 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4606 [2020-10-15 00:07:15,046 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:07:15,046 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:07:15,046 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 50 [2020-10-15 00:07:15,046 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-15 00:07:15,046 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 50 [2020-10-15 00:07:15,046 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:07:16,956 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 00:07:16,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:07:16,958 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:07:16,958 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:07:16,959 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-15 00:07:16,959 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:07:16,959 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-15 00:07:16,959 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:07:16,959 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:07:16,959 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 00:07:16,959 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 00:07:16,959 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 00:07:16,960 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:07:16,965 INFO L134 CoverageAnalysis]: Checked inductivity of 1176 backedges. 0 proven. 1176 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 00:07:16,965 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1383929119] [2020-10-15 00:07:16,965 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-15 00:07:16,965 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [51] total 51 [2020-10-15 00:07:16,966 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [124030406] [2020-10-15 00:07:16,966 INFO L459 AbstractCegarLoop]: Interpolant automaton has 51 states [2020-10-15 00:07:16,966 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 00:07:16,966 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2020-10-15 00:07:16,967 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=147, Invalid=2403, Unknown=0, NotChecked=0, Total=2550 [2020-10-15 00:07:16,967 INFO L87 Difference]: Start difference. First operand 473 states and 520 transitions. Second operand 51 states. [2020-10-15 00:07:18,598 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 00:07:18,598 INFO L93 Difference]: Finished difference Result 977 states and 1092 transitions. [2020-10-15 00:07:18,599 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2020-10-15 00:07:18,599 INFO L78 Accepts]: Start accepts. Automaton has 51 states. Word has length 60 [2020-10-15 00:07:18,599 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 00:07:18,601 INFO L225 Difference]: With dead ends: 977 [2020-10-15 00:07:18,602 INFO L226 Difference]: Without dead ends: 512 [2020-10-15 00:07:18,603 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=147, Invalid=2403, Unknown=0, NotChecked=0, Total=2550 [2020-10-15 00:07:18,603 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 512 states. [2020-10-15 00:07:18,650 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 512 to 481. [2020-10-15 00:07:18,650 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 481 states. [2020-10-15 00:07:18,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 481 states to 481 states and 528 transitions. [2020-10-15 00:07:18,651 INFO L78 Accepts]: Start accepts. Automaton has 481 states and 528 transitions. Word has length 60 [2020-10-15 00:07:18,652 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 00:07:18,652 INFO L479 AbstractCegarLoop]: Abstraction has 481 states and 528 transitions. [2020-10-15 00:07:18,652 INFO L480 AbstractCegarLoop]: Interpolant automaton has 51 states. [2020-10-15 00:07:18,652 INFO L276 IsEmpty]: Start isEmpty. Operand 481 states and 528 transitions. [2020-10-15 00:07:18,654 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-10-15 00:07:18,654 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 00:07:18,654 INFO L422 BasicCegarLoop]: trace histogram [49, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 00:07:18,654 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2020-10-15 00:07:18,654 INFO L427 AbstractCegarLoop]: === Iteration 59 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 00:07:18,655 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 00:07:18,655 INFO L82 PathProgramCache]: Analyzing trace with hash -934536777, now seen corresponding path program 49 times [2020-10-15 00:07:18,655 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 00:07:18,655 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1109219398] [2020-10-15 00:07:18,655 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 00:07:18,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:07:18,687 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:07:21,868 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:07:21,868 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 69 [2020-10-15 00:07:21,868 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:07:21,869 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3195 [2020-10-15 00:07:21,869 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:07:21,869 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:07:21,869 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 51 [2020-10-15 00:07:21,869 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-15 00:07:21,869 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 51 [2020-10-15 00:07:21,869 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:07:23,878 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 00:07:23,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:07:23,879 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:07:23,879 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:07:23,880 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-15 00:07:23,880 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:07:23,880 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-15 00:07:23,880 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:07:23,881 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:07:23,881 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 00:07:23,881 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 00:07:23,881 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 00:07:23,881 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:07:23,887 INFO L134 CoverageAnalysis]: Checked inductivity of 1225 backedges. 0 proven. 1225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 00:07:23,888 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1109219398] [2020-10-15 00:07:23,888 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-15 00:07:23,888 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [52] total 52 [2020-10-15 00:07:23,888 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1474758470] [2020-10-15 00:07:23,888 INFO L459 AbstractCegarLoop]: Interpolant automaton has 52 states [2020-10-15 00:07:23,888 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 00:07:23,889 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2020-10-15 00:07:23,889 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=150, Invalid=2502, Unknown=0, NotChecked=0, Total=2652 [2020-10-15 00:07:23,889 INFO L87 Difference]: Start difference. First operand 481 states and 528 transitions. Second operand 52 states. [2020-10-15 00:07:25,550 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 00:07:25,551 INFO L93 Difference]: Finished difference Result 993 states and 1108 transitions. [2020-10-15 00:07:25,551 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2020-10-15 00:07:25,551 INFO L78 Accepts]: Start accepts. Automaton has 52 states. Word has length 61 [2020-10-15 00:07:25,552 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 00:07:25,554 INFO L225 Difference]: With dead ends: 993 [2020-10-15 00:07:25,554 INFO L226 Difference]: Without dead ends: 520 [2020-10-15 00:07:25,555 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=150, Invalid=2502, Unknown=0, NotChecked=0, Total=2652 [2020-10-15 00:07:25,556 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 520 states. [2020-10-15 00:07:25,603 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 520 to 489. [2020-10-15 00:07:25,604 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 489 states. [2020-10-15 00:07:25,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 489 states to 489 states and 536 transitions. [2020-10-15 00:07:25,605 INFO L78 Accepts]: Start accepts. Automaton has 489 states and 536 transitions. Word has length 61 [2020-10-15 00:07:25,605 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 00:07:25,605 INFO L479 AbstractCegarLoop]: Abstraction has 489 states and 536 transitions. [2020-10-15 00:07:25,605 INFO L480 AbstractCegarLoop]: Interpolant automaton has 52 states. [2020-10-15 00:07:25,605 INFO L276 IsEmpty]: Start isEmpty. Operand 489 states and 536 transitions. [2020-10-15 00:07:25,606 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2020-10-15 00:07:25,606 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 00:07:25,607 INFO L422 BasicCegarLoop]: trace histogram [50, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 00:07:25,607 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2020-10-15 00:07:25,607 INFO L427 AbstractCegarLoop]: === Iteration 60 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 00:07:25,607 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 00:07:25,607 INFO L82 PathProgramCache]: Analyzing trace with hash 1120433546, now seen corresponding path program 50 times [2020-10-15 00:07:25,607 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 00:07:25,608 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1240723363] [2020-10-15 00:07:25,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 00:07:25,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:07:25,638 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:07:28,157 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:07:28,157 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 70 [2020-10-15 00:07:28,157 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:07:28,157 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2531 [2020-10-15 00:07:28,157 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:07:28,157 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:07:28,157 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 52 [2020-10-15 00:07:28,158 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-15 00:07:28,158 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 52 [2020-10-15 00:07:28,158 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:07:30,282 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 00:07:30,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:07:30,284 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:07:30,285 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:07:30,285 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-15 00:07:30,285 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:07:30,285 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-15 00:07:30,285 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:07:30,285 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:07:30,285 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 00:07:30,285 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 00:07:30,286 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 00:07:30,286 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:07:30,292 INFO L134 CoverageAnalysis]: Checked inductivity of 1275 backedges. 0 proven. 1275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 00:07:30,292 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1240723363] [2020-10-15 00:07:30,292 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-15 00:07:30,292 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [53] total 53 [2020-10-15 00:07:30,292 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1077590837] [2020-10-15 00:07:30,293 INFO L459 AbstractCegarLoop]: Interpolant automaton has 53 states [2020-10-15 00:07:30,293 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 00:07:30,293 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2020-10-15 00:07:30,293 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=2603, Unknown=0, NotChecked=0, Total=2756 [2020-10-15 00:07:30,294 INFO L87 Difference]: Start difference. First operand 489 states and 536 transitions. Second operand 53 states. [2020-10-15 00:07:32,022 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 00:07:32,022 INFO L93 Difference]: Finished difference Result 1009 states and 1124 transitions. [2020-10-15 00:07:32,023 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2020-10-15 00:07:32,023 INFO L78 Accepts]: Start accepts. Automaton has 53 states. Word has length 62 [2020-10-15 00:07:32,023 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 00:07:32,025 INFO L225 Difference]: With dead ends: 1009 [2020-10-15 00:07:32,025 INFO L226 Difference]: Without dead ends: 528 [2020-10-15 00:07:32,027 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=153, Invalid=2603, Unknown=0, NotChecked=0, Total=2756 [2020-10-15 00:07:32,027 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 528 states. [2020-10-15 00:07:32,061 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 528 to 497. [2020-10-15 00:07:32,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 497 states. [2020-10-15 00:07:32,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 497 states to 497 states and 544 transitions. [2020-10-15 00:07:32,063 INFO L78 Accepts]: Start accepts. Automaton has 497 states and 544 transitions. Word has length 62 [2020-10-15 00:07:32,063 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 00:07:32,063 INFO L479 AbstractCegarLoop]: Abstraction has 497 states and 544 transitions. [2020-10-15 00:07:32,063 INFO L480 AbstractCegarLoop]: Interpolant automaton has 53 states. [2020-10-15 00:07:32,064 INFO L276 IsEmpty]: Start isEmpty. Operand 497 states and 544 transitions. [2020-10-15 00:07:32,065 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-10-15 00:07:32,065 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 00:07:32,065 INFO L422 BasicCegarLoop]: trace histogram [51, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 00:07:32,065 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2020-10-15 00:07:32,065 INFO L427 AbstractCegarLoop]: === Iteration 61 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 00:07:32,066 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 00:07:32,066 INFO L82 PathProgramCache]: Analyzing trace with hash 400004119, now seen corresponding path program 51 times [2020-10-15 00:07:32,066 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 00:07:32,066 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1008725778] [2020-10-15 00:07:32,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 00:07:32,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:07:32,102 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:07:34,626 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:07:34,626 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 71 [2020-10-15 00:07:34,626 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:07:34,626 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2540 [2020-10-15 00:07:34,626 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:07:34,626 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:07:34,627 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 53 [2020-10-15 00:07:34,627 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-15 00:07:34,627 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 53 [2020-10-15 00:07:34,627 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:07:36,814 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 00:07:36,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:07:36,815 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:07:36,815 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:07:36,815 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-15 00:07:36,815 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:07:36,815 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-15 00:07:36,816 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:07:36,816 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:07:36,816 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 00:07:36,816 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 00:07:36,816 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 00:07:36,816 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:07:36,824 INFO L134 CoverageAnalysis]: Checked inductivity of 1326 backedges. 0 proven. 1326 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 00:07:36,824 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1008725778] [2020-10-15 00:07:36,824 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-15 00:07:36,824 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [54] total 54 [2020-10-15 00:07:36,824 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2051092249] [2020-10-15 00:07:36,825 INFO L459 AbstractCegarLoop]: Interpolant automaton has 54 states [2020-10-15 00:07:36,825 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 00:07:36,825 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2020-10-15 00:07:36,825 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=156, Invalid=2706, Unknown=0, NotChecked=0, Total=2862 [2020-10-15 00:07:36,826 INFO L87 Difference]: Start difference. First operand 497 states and 544 transitions. Second operand 54 states. [2020-10-15 00:07:38,609 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 00:07:38,609 INFO L93 Difference]: Finished difference Result 1025 states and 1140 transitions. [2020-10-15 00:07:38,610 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2020-10-15 00:07:38,610 INFO L78 Accepts]: Start accepts. Automaton has 54 states. Word has length 63 [2020-10-15 00:07:38,610 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 00:07:38,612 INFO L225 Difference]: With dead ends: 1025 [2020-10-15 00:07:38,612 INFO L226 Difference]: Without dead ends: 536 [2020-10-15 00:07:38,613 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=156, Invalid=2706, Unknown=0, NotChecked=0, Total=2862 [2020-10-15 00:07:38,614 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 536 states. [2020-10-15 00:07:38,662 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 536 to 505. [2020-10-15 00:07:38,663 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 505 states. [2020-10-15 00:07:38,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 505 states to 505 states and 552 transitions. [2020-10-15 00:07:38,664 INFO L78 Accepts]: Start accepts. Automaton has 505 states and 552 transitions. Word has length 63 [2020-10-15 00:07:38,664 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 00:07:38,664 INFO L479 AbstractCegarLoop]: Abstraction has 505 states and 552 transitions. [2020-10-15 00:07:38,665 INFO L480 AbstractCegarLoop]: Interpolant automaton has 54 states. [2020-10-15 00:07:38,665 INFO L276 IsEmpty]: Start isEmpty. Operand 505 states and 552 transitions. [2020-10-15 00:07:38,666 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2020-10-15 00:07:38,666 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 00:07:38,666 INFO L422 BasicCegarLoop]: trace histogram [52, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 00:07:38,666 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2020-10-15 00:07:38,666 INFO L427 AbstractCegarLoop]: === Iteration 62 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 00:07:38,666 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 00:07:38,667 INFO L82 PathProgramCache]: Analyzing trace with hash -458471638, now seen corresponding path program 52 times [2020-10-15 00:07:38,667 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 00:07:38,667 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [710802210] [2020-10-15 00:07:38,667 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 00:07:38,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:07:38,697 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:07:42,093 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:07:42,143 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:07:42,143 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 72 [2020-10-15 00:07:42,143 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-15 00:07:42,144 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3457 [2020-10-15 00:07:42,144 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:07:42,144 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:07:42,144 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 54 [2020-10-15 00:07:42,144 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-15 00:07:42,144 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 54 [2020-10-15 00:07:42,144 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:07:44,381 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 00:07:44,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:07:44,382 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:07:44,382 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:07:44,382 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-15 00:07:44,382 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:07:44,383 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-15 00:07:44,383 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:07:44,383 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:07:44,383 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 00:07:44,383 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 00:07:44,383 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 00:07:44,383 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:07:44,390 INFO L134 CoverageAnalysis]: Checked inductivity of 1378 backedges. 0 proven. 1378 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 00:07:44,391 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [710802210] [2020-10-15 00:07:44,391 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-15 00:07:44,391 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [55] total 55 [2020-10-15 00:07:44,391 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [323697597] [2020-10-15 00:07:44,391 INFO L459 AbstractCegarLoop]: Interpolant automaton has 55 states [2020-10-15 00:07:44,391 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 00:07:44,392 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2020-10-15 00:07:44,392 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=159, Invalid=2811, Unknown=0, NotChecked=0, Total=2970 [2020-10-15 00:07:44,393 INFO L87 Difference]: Start difference. First operand 505 states and 552 transitions. Second operand 55 states. [2020-10-15 00:07:46,255 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 00:07:46,256 INFO L93 Difference]: Finished difference Result 1041 states and 1156 transitions. [2020-10-15 00:07:46,256 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2020-10-15 00:07:46,256 INFO L78 Accepts]: Start accepts. Automaton has 55 states. Word has length 64 [2020-10-15 00:07:46,256 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 00:07:46,259 INFO L225 Difference]: With dead ends: 1041 [2020-10-15 00:07:46,259 INFO L226 Difference]: Without dead ends: 544 [2020-10-15 00:07:46,261 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=159, Invalid=2811, Unknown=0, NotChecked=0, Total=2970 [2020-10-15 00:07:46,261 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 544 states. [2020-10-15 00:07:46,296 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 544 to 513. [2020-10-15 00:07:46,296 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 513 states. [2020-10-15 00:07:46,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 513 states to 513 states and 560 transitions. [2020-10-15 00:07:46,298 INFO L78 Accepts]: Start accepts. Automaton has 513 states and 560 transitions. Word has length 64 [2020-10-15 00:07:46,298 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 00:07:46,298 INFO L479 AbstractCegarLoop]: Abstraction has 513 states and 560 transitions. [2020-10-15 00:07:46,298 INFO L480 AbstractCegarLoop]: Interpolant automaton has 55 states. [2020-10-15 00:07:46,298 INFO L276 IsEmpty]: Start isEmpty. Operand 513 states and 560 transitions. [2020-10-15 00:07:46,299 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-10-15 00:07:46,299 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 00:07:46,299 INFO L422 BasicCegarLoop]: trace histogram [53, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 00:07:46,300 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61 [2020-10-15 00:07:46,300 INFO L427 AbstractCegarLoop]: === Iteration 63 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 00:07:46,300 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 00:07:46,300 INFO L82 PathProgramCache]: Analyzing trace with hash -1301416329, now seen corresponding path program 53 times [2020-10-15 00:07:46,300 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 00:07:46,300 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [650518102] [2020-10-15 00:07:46,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 00:07:46,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:07:46,336 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:07:48,987 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:07:48,988 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 73 [2020-10-15 00:07:48,988 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:07:48,988 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2667 [2020-10-15 00:07:48,988 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:07:48,988 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:07:48,988 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 55 [2020-10-15 00:07:48,988 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-15 00:07:48,988 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 55 [2020-10-15 00:07:48,989 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:07:51,312 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 00:07:51,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:07:51,313 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:07:51,313 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:07:51,314 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-15 00:07:51,314 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:07:51,314 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-15 00:07:51,314 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:07:51,314 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:07:51,314 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 00:07:51,314 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 00:07:51,314 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 00:07:51,315 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:07:51,321 INFO L134 CoverageAnalysis]: Checked inductivity of 1431 backedges. 0 proven. 1431 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 00:07:51,321 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [650518102] [2020-10-15 00:07:51,321 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-15 00:07:51,322 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [56] total 56 [2020-10-15 00:07:51,322 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [768680084] [2020-10-15 00:07:51,322 INFO L459 AbstractCegarLoop]: Interpolant automaton has 56 states [2020-10-15 00:07:51,322 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 00:07:51,322 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2020-10-15 00:07:51,323 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=162, Invalid=2918, Unknown=0, NotChecked=0, Total=3080 [2020-10-15 00:07:51,323 INFO L87 Difference]: Start difference. First operand 513 states and 560 transitions. Second operand 56 states. [2020-10-15 00:07:53,236 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 00:07:53,236 INFO L93 Difference]: Finished difference Result 1057 states and 1172 transitions. [2020-10-15 00:07:53,236 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2020-10-15 00:07:53,236 INFO L78 Accepts]: Start accepts. Automaton has 56 states. Word has length 65 [2020-10-15 00:07:53,237 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 00:07:53,238 INFO L225 Difference]: With dead ends: 1057 [2020-10-15 00:07:53,238 INFO L226 Difference]: Without dead ends: 552 [2020-10-15 00:07:53,239 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=162, Invalid=2918, Unknown=0, NotChecked=0, Total=3080 [2020-10-15 00:07:53,240 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 552 states. [2020-10-15 00:07:53,273 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 552 to 521. [2020-10-15 00:07:53,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 521 states. [2020-10-15 00:07:53,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 521 states to 521 states and 568 transitions. [2020-10-15 00:07:53,274 INFO L78 Accepts]: Start accepts. Automaton has 521 states and 568 transitions. Word has length 65 [2020-10-15 00:07:53,275 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 00:07:53,275 INFO L479 AbstractCegarLoop]: Abstraction has 521 states and 568 transitions. [2020-10-15 00:07:53,275 INFO L480 AbstractCegarLoop]: Interpolant automaton has 56 states. [2020-10-15 00:07:53,275 INFO L276 IsEmpty]: Start isEmpty. Operand 521 states and 568 transitions. [2020-10-15 00:07:53,276 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2020-10-15 00:07:53,276 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 00:07:53,276 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 00:07:53,277 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62 [2020-10-15 00:07:53,277 INFO L427 AbstractCegarLoop]: === Iteration 64 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 00:07:53,277 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 00:07:53,277 INFO L82 PathProgramCache]: Analyzing trace with hash 293905957, now seen corresponding path program 8 times [2020-10-15 00:07:53,277 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 00:07:53,277 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [223890918] [2020-10-15 00:07:53,278 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 00:07:53,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:07:53,283 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:07:53,286 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:07:53,293 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:07:53,302 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:07:53,310 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:07:53,328 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:07:53,395 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:07:54,117 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:07:56,668 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:07:56,939 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:07:58,285 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:07:58,285 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 98 [2020-10-15 00:07:58,285 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 10 [2020-10-15 00:07:58,285 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-15 00:07:58,285 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:07:58,285 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:07:58,285 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-15 00:07:58,286 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-15 00:07:58,286 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 82 [2020-10-15 00:07:58,286 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:07:58,410 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 00:07:58,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:07:58,411 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:07:58,412 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:07:58,412 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-15 00:07:58,412 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:07:58,412 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-15 00:07:58,412 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:07:58,412 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:07:58,413 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 00:07:58,413 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 00:07:58,413 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 00:07:58,413 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:07:58,413 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-15 00:07:58,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:07:58,415 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:07:58,417 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:07:58,417 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-15 00:07:58,417 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:07:58,417 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-15 00:07:58,417 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:07:58,417 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:07:58,418 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-15 00:07:58,418 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 00:07:58,418 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-15 00:07:58,418 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:07:58,419 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-10-15 00:07:58,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:07:58,420 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:07:58,422 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:07:58,422 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-15 00:07:58,422 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:07:58,422 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-15 00:07:58,422 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:07:58,422 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:07:58,423 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-15 00:07:58,423 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 00:07:58,423 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-15 00:07:58,423 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:07:58,424 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-10-15 00:07:58,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:07:58,425 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:07:58,427 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:07:58,427 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-15 00:07:58,427 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:07:58,427 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-15 00:07:58,428 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:07:58,428 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:07:58,428 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-15 00:07:58,428 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 00:07:58,428 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-15 00:07:58,428 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:07:58,429 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2020-10-15 00:07:58,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:07:58,431 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:07:58,434 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:07:58,434 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-15 00:07:58,434 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:07:58,434 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-15 00:07:58,434 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:07:58,434 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:07:58,434 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-15 00:07:58,434 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 00:07:58,435 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-15 00:07:58,435 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:07:58,436 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2020-10-15 00:07:58,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:07:58,438 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:07:58,440 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:07:58,440 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-15 00:07:58,440 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:07:58,441 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-15 00:07:58,441 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:07:58,441 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:07:58,441 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-15 00:07:58,441 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 00:07:58,441 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-15 00:07:58,441 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:07:58,442 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2020-10-15 00:07:58,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:07:58,445 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:07:58,447 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:07:58,447 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-15 00:07:58,447 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:07:58,447 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-15 00:07:58,447 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:07:58,447 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:07:58,447 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-15 00:07:58,447 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 00:07:58,447 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-15 00:07:58,448 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:07:58,448 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2020-10-15 00:07:58,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:07:58,450 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:07:58,452 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:07:58,452 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-15 00:07:58,452 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:07:58,452 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-15 00:07:58,452 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:07:58,453 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:07:58,453 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-15 00:07:58,453 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 00:07:58,453 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-15 00:07:58,453 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:07:58,454 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2020-10-15 00:07:58,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:07:58,456 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:07:58,459 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:07:58,459 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-15 00:07:58,459 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:07:58,459 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-15 00:07:58,459 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:07:58,459 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:07:58,459 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-15 00:07:58,460 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 00:07:58,460 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-15 00:07:58,460 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:07:58,465 INFO L134 CoverageAnalysis]: Checked inductivity of 248 backedges. 16 proven. 120 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2020-10-15 00:07:58,465 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [223890918] [2020-10-15 00:07:58,465 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-15 00:07:58,466 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-15 00:07:58,466 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [29183788] [2020-10-15 00:07:58,466 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-15 00:07:58,466 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 00:07:58,466 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-15 00:07:58,467 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2020-10-15 00:07:58,467 INFO L87 Difference]: Start difference. First operand 521 states and 568 transitions. Second operand 11 states. [2020-10-15 00:07:58,779 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 00:07:58,779 INFO L93 Difference]: Finished difference Result 653 states and 712 transitions. [2020-10-15 00:07:58,780 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-15 00:07:58,780 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 74 [2020-10-15 00:07:58,780 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 00:07:58,783 INFO L225 Difference]: With dead ends: 653 [2020-10-15 00:07:58,784 INFO L226 Difference]: Without dead ends: 646 [2020-10-15 00:07:58,784 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2020-10-15 00:07:58,785 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 646 states. [2020-10-15 00:07:58,829 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 646 to 584. [2020-10-15 00:07:58,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 584 states. [2020-10-15 00:07:58,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 584 states to 584 states and 637 transitions. [2020-10-15 00:07:58,831 INFO L78 Accepts]: Start accepts. Automaton has 584 states and 637 transitions. Word has length 74 [2020-10-15 00:07:58,831 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 00:07:58,831 INFO L479 AbstractCegarLoop]: Abstraction has 584 states and 637 transitions. [2020-10-15 00:07:58,831 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-15 00:07:58,832 INFO L276 IsEmpty]: Start isEmpty. Operand 584 states and 637 transitions. [2020-10-15 00:07:58,833 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-10-15 00:07:58,833 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 00:07:58,833 INFO L422 BasicCegarLoop]: trace histogram [54, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 00:07:58,833 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63 [2020-10-15 00:07:58,833 INFO L427 AbstractCegarLoop]: === Iteration 65 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 00:07:58,833 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 00:07:58,834 INFO L82 PathProgramCache]: Analyzing trace with hash -1662897974, now seen corresponding path program 54 times [2020-10-15 00:07:58,834 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 00:07:58,834 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [831921663] [2020-10-15 00:07:58,834 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 00:07:58,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:07:58,871 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:08:02,909 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:08:02,909 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 74 [2020-10-15 00:08:02,909 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:08:02,909 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4055 [2020-10-15 00:08:02,910 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:08:02,910 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:08:02,910 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 56 [2020-10-15 00:08:02,910 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-15 00:08:02,910 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 56 [2020-10-15 00:08:02,910 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:08:05,372 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 00:08:05,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:08:05,373 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:08:05,373 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:08:05,373 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-15 00:08:05,373 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:08:05,373 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-15 00:08:05,374 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:08:05,374 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:08:05,374 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 00:08:05,374 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 00:08:05,374 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 00:08:05,375 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-15 00:08:05,382 INFO L134 CoverageAnalysis]: Checked inductivity of 1485 backedges. 0 proven. 1485 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 00:08:05,383 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [831921663] [2020-10-15 00:08:05,383 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-15 00:08:05,383 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [57] total 57 [2020-10-15 00:08:05,383 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [817027726] [2020-10-15 00:08:05,383 INFO L459 AbstractCegarLoop]: Interpolant automaton has 57 states [2020-10-15 00:08:05,383 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 00:08:05,384 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2020-10-15 00:08:05,384 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=165, Invalid=3027, Unknown=0, NotChecked=0, Total=3192 [2020-10-15 00:08:05,385 INFO L87 Difference]: Start difference. First operand 584 states and 637 transitions. Second operand 57 states. [2020-10-15 00:08:07,349 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 00:08:07,350 INFO L93 Difference]: Finished difference Result 1204 states and 1334 transitions. [2020-10-15 00:08:07,350 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2020-10-15 00:08:07,350 INFO L78 Accepts]: Start accepts. Automaton has 57 states. Word has length 66 [2020-10-15 00:08:07,351 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 00:08:07,353 INFO L225 Difference]: With dead ends: 1204 [2020-10-15 00:08:07,353 INFO L226 Difference]: Without dead ends: 628 [2020-10-15 00:08:07,354 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=165, Invalid=3027, Unknown=0, NotChecked=0, Total=3192 [2020-10-15 00:08:07,355 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 628 states. [2020-10-15 00:08:07,429 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 628 to 593. [2020-10-15 00:08:07,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 593 states. [2020-10-15 00:08:07,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 593 states to 593 states and 646 transitions. [2020-10-15 00:08:07,430 INFO L78 Accepts]: Start accepts. Automaton has 593 states and 646 transitions. Word has length 66 [2020-10-15 00:08:07,430 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 00:08:07,430 INFO L479 AbstractCegarLoop]: Abstraction has 593 states and 646 transitions. [2020-10-15 00:08:07,430 INFO L480 AbstractCegarLoop]: Interpolant automaton has 57 states. [2020-10-15 00:08:07,431 INFO L276 IsEmpty]: Start isEmpty. Operand 593 states and 646 transitions. [2020-10-15 00:08:07,432 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-10-15 00:08:07,432 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 00:08:07,432 INFO L422 BasicCegarLoop]: trace histogram [55, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 00:08:07,432 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64 [2020-10-15 00:08:07,432 INFO L427 AbstractCegarLoop]: === Iteration 66 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 00:08:07,432 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 00:08:07,433 INFO L82 PathProgramCache]: Analyzing trace with hash 16072919, now seen corresponding path program 55 times [2020-10-15 00:08:07,433 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 00:08:07,433 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1339805453] [2020-10-15 00:08:07,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 00:08:07,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:08:07,470 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:08:12,462 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:08:12,463 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 75 [2020-10-15 00:08:12,463 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:08:12,463 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5008 [2020-10-15 00:08:12,463 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:08:12,463 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:08:12,463 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 57 [2020-10-15 00:08:12,463 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-15 00:08:12,464 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 57 [2020-10-15 00:08:12,464 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:08:15,005 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 00:08:15,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:08:15,006 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:08:15,007 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:08:15,007 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-15 00:08:15,007 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:08:15,007 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-15 00:08:15,007 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:08:15,007 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:08:15,008 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 00:08:15,008 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 00:08:15,008 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 00:08:15,008 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-15 00:08:15,016 INFO L134 CoverageAnalysis]: Checked inductivity of 1540 backedges. 0 proven. 1540 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 00:08:15,016 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1339805453] [2020-10-15 00:08:15,016 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-15 00:08:15,016 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [58] total 58 [2020-10-15 00:08:15,016 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [178474180] [2020-10-15 00:08:15,016 INFO L459 AbstractCegarLoop]: Interpolant automaton has 58 states [2020-10-15 00:08:15,017 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 00:08:15,017 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2020-10-15 00:08:15,017 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=168, Invalid=3138, Unknown=0, NotChecked=0, Total=3306 [2020-10-15 00:08:15,017 INFO L87 Difference]: Start difference. First operand 593 states and 646 transitions. Second operand 58 states. [2020-10-15 00:08:17,025 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 00:08:17,025 INFO L93 Difference]: Finished difference Result 1222 states and 1352 transitions. [2020-10-15 00:08:17,026 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2020-10-15 00:08:17,026 INFO L78 Accepts]: Start accepts. Automaton has 58 states. Word has length 67 [2020-10-15 00:08:17,026 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 00:08:17,028 INFO L225 Difference]: With dead ends: 1222 [2020-10-15 00:08:17,028 INFO L226 Difference]: Without dead ends: 637 [2020-10-15 00:08:17,030 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=168, Invalid=3138, Unknown=0, NotChecked=0, Total=3306 [2020-10-15 00:08:17,030 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 637 states. [2020-10-15 00:08:17,069 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 637 to 602. [2020-10-15 00:08:17,069 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 602 states. [2020-10-15 00:08:17,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 602 states to 602 states and 655 transitions. [2020-10-15 00:08:17,070 INFO L78 Accepts]: Start accepts. Automaton has 602 states and 655 transitions. Word has length 67 [2020-10-15 00:08:17,070 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 00:08:17,070 INFO L479 AbstractCegarLoop]: Abstraction has 602 states and 655 transitions. [2020-10-15 00:08:17,071 INFO L480 AbstractCegarLoop]: Interpolant automaton has 58 states. [2020-10-15 00:08:17,071 INFO L276 IsEmpty]: Start isEmpty. Operand 602 states and 655 transitions. [2020-10-15 00:08:17,072 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2020-10-15 00:08:17,072 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 00:08:17,072 INFO L422 BasicCegarLoop]: trace histogram [56, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 00:08:17,072 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65 [2020-10-15 00:08:17,072 INFO L427 AbstractCegarLoop]: === Iteration 67 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 00:08:17,072 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 00:08:17,073 INFO L82 PathProgramCache]: Analyzing trace with hash 524563050, now seen corresponding path program 56 times [2020-10-15 00:08:17,073 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 00:08:17,073 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2054592896] [2020-10-15 00:08:17,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 00:08:17,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:08:17,111 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:08:19,978 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:08:22,146 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:08:22,146 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 76 [2020-10-15 00:08:22,146 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-15 00:08:22,146 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5051 [2020-10-15 00:08:22,146 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:08:22,147 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:08:22,147 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 58 [2020-10-15 00:08:22,147 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-15 00:08:22,147 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 58 [2020-10-15 00:08:22,147 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:08:24,782 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 00:08:24,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:08:24,783 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:08:24,784 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:08:24,784 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-15 00:08:24,784 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:08:24,784 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-15 00:08:24,784 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:08:24,784 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:08:24,785 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 00:08:24,785 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 00:08:24,785 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 00:08:24,785 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:08:24,793 INFO L134 CoverageAnalysis]: Checked inductivity of 1596 backedges. 0 proven. 1596 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 00:08:24,793 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2054592896] [2020-10-15 00:08:24,793 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-15 00:08:24,793 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [59] total 59 [2020-10-15 00:08:24,793 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1171521485] [2020-10-15 00:08:24,794 INFO L459 AbstractCegarLoop]: Interpolant automaton has 59 states [2020-10-15 00:08:24,794 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 00:08:24,794 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2020-10-15 00:08:24,794 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=3251, Unknown=0, NotChecked=0, Total=3422 [2020-10-15 00:08:24,794 INFO L87 Difference]: Start difference. First operand 602 states and 655 transitions. Second operand 59 states. [2020-10-15 00:08:26,882 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 00:08:26,882 INFO L93 Difference]: Finished difference Result 1240 states and 1370 transitions. [2020-10-15 00:08:26,882 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2020-10-15 00:08:26,882 INFO L78 Accepts]: Start accepts. Automaton has 59 states. Word has length 68 [2020-10-15 00:08:26,883 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 00:08:26,885 INFO L225 Difference]: With dead ends: 1240 [2020-10-15 00:08:26,885 INFO L226 Difference]: Without dead ends: 646 [2020-10-15 00:08:26,886 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=171, Invalid=3251, Unknown=0, NotChecked=0, Total=3422 [2020-10-15 00:08:26,887 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 646 states. [2020-10-15 00:08:26,926 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 646 to 611. [2020-10-15 00:08:26,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 611 states. [2020-10-15 00:08:26,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 611 states to 611 states and 664 transitions. [2020-10-15 00:08:26,927 INFO L78 Accepts]: Start accepts. Automaton has 611 states and 664 transitions. Word has length 68 [2020-10-15 00:08:26,927 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 00:08:26,928 INFO L479 AbstractCegarLoop]: Abstraction has 611 states and 664 transitions. [2020-10-15 00:08:26,928 INFO L480 AbstractCegarLoop]: Interpolant automaton has 59 states. [2020-10-15 00:08:26,928 INFO L276 IsEmpty]: Start isEmpty. Operand 611 states and 664 transitions. [2020-10-15 00:08:26,929 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2020-10-15 00:08:26,929 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 00:08:26,929 INFO L422 BasicCegarLoop]: trace histogram [57, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 00:08:26,929 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66 [2020-10-15 00:08:26,930 INFO L427 AbstractCegarLoop]: === Iteration 68 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 00:08:26,930 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 00:08:26,930 INFO L82 PathProgramCache]: Analyzing trace with hash -892112073, now seen corresponding path program 57 times [2020-10-15 00:08:26,930 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 00:08:26,930 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1508833601] [2020-10-15 00:08:26,930 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 00:08:26,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:08:26,963 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:08:31,167 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:08:31,167 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 77 [2020-10-15 00:08:31,167 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:08:31,167 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4215 [2020-10-15 00:08:31,168 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:08:31,168 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:08:31,168 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 59 [2020-10-15 00:08:31,168 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-15 00:08:31,168 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 59 [2020-10-15 00:08:31,168 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:08:33,891 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 00:08:33,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:08:33,893 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:08:33,894 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:08:33,894 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-15 00:08:33,894 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:08:33,894 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-15 00:08:33,894 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:08:33,894 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:08:33,895 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 00:08:33,895 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 00:08:33,895 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 00:08:33,895 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:08:33,902 INFO L134 CoverageAnalysis]: Checked inductivity of 1653 backedges. 0 proven. 1653 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 00:08:33,902 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1508833601] [2020-10-15 00:08:33,903 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-15 00:08:33,903 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [60] total 60 [2020-10-15 00:08:33,903 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [527528866] [2020-10-15 00:08:33,903 INFO L459 AbstractCegarLoop]: Interpolant automaton has 60 states [2020-10-15 00:08:33,903 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 00:08:33,903 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2020-10-15 00:08:33,904 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=174, Invalid=3366, Unknown=0, NotChecked=0, Total=3540 [2020-10-15 00:08:33,904 INFO L87 Difference]: Start difference. First operand 611 states and 664 transitions. Second operand 60 states. [2020-10-15 00:08:36,021 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 00:08:36,022 INFO L93 Difference]: Finished difference Result 1258 states and 1388 transitions. [2020-10-15 00:08:36,022 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2020-10-15 00:08:36,022 INFO L78 Accepts]: Start accepts. Automaton has 60 states. Word has length 69 [2020-10-15 00:08:36,023 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 00:08:36,025 INFO L225 Difference]: With dead ends: 1258 [2020-10-15 00:08:36,025 INFO L226 Difference]: Without dead ends: 655 [2020-10-15 00:08:36,026 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=174, Invalid=3366, Unknown=0, NotChecked=0, Total=3540 [2020-10-15 00:08:36,027 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 655 states. [2020-10-15 00:08:36,070 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 655 to 620. [2020-10-15 00:08:36,070 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 620 states. [2020-10-15 00:08:36,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 620 states to 620 states and 673 transitions. [2020-10-15 00:08:36,071 INFO L78 Accepts]: Start accepts. Automaton has 620 states and 673 transitions. Word has length 69 [2020-10-15 00:08:36,071 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 00:08:36,071 INFO L479 AbstractCegarLoop]: Abstraction has 620 states and 673 transitions. [2020-10-15 00:08:36,071 INFO L480 AbstractCegarLoop]: Interpolant automaton has 60 states. [2020-10-15 00:08:36,072 INFO L276 IsEmpty]: Start isEmpty. Operand 620 states and 673 transitions. [2020-10-15 00:08:36,072 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2020-10-15 00:08:36,072 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 00:08:36,072 INFO L422 BasicCegarLoop]: trace histogram [58, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 00:08:36,072 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67 [2020-10-15 00:08:36,073 INFO L427 AbstractCegarLoop]: === Iteration 69 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 00:08:36,073 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 00:08:36,073 INFO L82 PathProgramCache]: Analyzing trace with hash -1859367926, now seen corresponding path program 58 times [2020-10-15 00:08:36,073 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 00:08:36,073 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [465211656] [2020-10-15 00:08:36,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 00:08:36,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:08:36,098 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:08:41,154 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:08:41,154 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 78 [2020-10-15 00:08:41,154 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:08:41,155 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5067 [2020-10-15 00:08:41,155 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:08:41,155 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:08:41,155 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 60 [2020-10-15 00:08:41,155 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-15 00:08:41,155 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 60 [2020-10-15 00:08:41,155 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0