/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=BIGGEST --traceabstraction.additional.smt.options log-additional-information=true --traceabstraction.additional.smt.options unknown-allowed=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/array-examples/standard_two_index_07.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-adbd35c [2020-10-12 10:06:48,820 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-12 10:06:48,823 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-12 10:06:48,850 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-12 10:06:48,850 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-12 10:06:48,852 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-12 10:06:48,853 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-12 10:06:48,856 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-12 10:06:48,858 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-12 10:06:48,859 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-12 10:06:48,860 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-12 10:06:48,862 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-12 10:06:48,862 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-12 10:06:48,863 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-12 10:06:48,865 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-12 10:06:48,868 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-12 10:06:48,869 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-12 10:06:48,872 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-12 10:06:48,877 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-12 10:06:48,881 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-12 10:06:48,886 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-12 10:06:48,888 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-12 10:06:48,890 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-12 10:06:48,891 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-12 10:06:48,898 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-12 10:06:48,899 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-12 10:06:48,899 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-12 10:06:48,902 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-12 10:06:48,903 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-12 10:06:48,905 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-12 10:06:48,905 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-12 10:06:48,906 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-12 10:06:48,907 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-12 10:06:48,908 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-12 10:06:48,910 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-12 10:06:48,910 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-12 10:06:48,911 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-12 10:06:48,911 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-12 10:06:48,911 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-12 10:06:48,924 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-12 10:06:48,925 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-12 10:06:48,931 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 [2020-10-12 10:06:48,985 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-12 10:06:48,986 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-12 10:06:48,990 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-12 10:06:48,990 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-12 10:06:48,990 INFO L138 SettingsManager]: * Use SBE=true [2020-10-12 10:06:48,990 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-12 10:06:48,991 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-12 10:06:48,991 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-12 10:06:48,992 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-12 10:06:48,992 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-12 10:06:48,993 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-12 10:06:48,993 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-12 10:06:48,993 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-12 10:06:48,993 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-12 10:06:48,993 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-12 10:06:48,994 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-12 10:06:48,994 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-12 10:06:48,996 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-12 10:06:48,996 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-12 10:06:48,997 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-12 10:06:48,997 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-12 10:06:48,997 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-12 10:06:48,997 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-12 10:06:48,997 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-12 10:06:48,998 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-12 10:06:48,998 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-12 10:06:48,998 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-12 10:06:48,998 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-12 10:06:48,998 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-12 10:06:48,999 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=BIGGEST;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=BIGGEST;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=BIGGEST;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=BIGGEST;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=BIGGEST;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=BIGGEST;log-additional-information=true;unknown-allowed=true; [2020-10-12 10:06:49,379 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-12 10:06:49,398 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-12 10:06:49,403 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-12 10:06:49,406 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-12 10:06:49,407 INFO L275 PluginConnector]: CDTParser initialized [2020-10-12 10:06:49,408 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-examples/standard_two_index_07.i [2020-10-12 10:06:49,499 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/e28bd2c28/5c1bedc7422d47109a3056a435b81d69/FLAGf4f99d840 [2020-10-12 10:06:50,037 INFO L306 CDTParser]: Found 1 translation units. [2020-10-12 10:06:50,038 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/array-examples/standard_two_index_07.i [2020-10-12 10:06:50,047 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/e28bd2c28/5c1bedc7422d47109a3056a435b81d69/FLAGf4f99d840 [2020-10-12 10:06:50,397 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/e28bd2c28/5c1bedc7422d47109a3056a435b81d69 [2020-10-12 10:06:50,410 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-12 10:06:50,413 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-12 10:06:50,416 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-12 10:06:50,416 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-12 10:06:50,420 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-12 10:06:50,421 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.10 10:06:50" (1/1) ... [2020-10-12 10:06:50,426 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6d72532b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 10:06:50, skipping insertion in model container [2020-10-12 10:06:50,426 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.10 10:06:50" (1/1) ... [2020-10-12 10:06:50,436 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-12 10:06:50,460 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-12 10:06:50,659 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-12 10:06:50,665 INFO L203 MainTranslator]: Completed pre-run [2020-10-12 10:06:50,692 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-12 10:06:50,716 INFO L208 MainTranslator]: Completed translation [2020-10-12 10:06:50,716 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 10:06:50 WrapperNode [2020-10-12 10:06:50,717 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-12 10:06:50,718 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-12 10:06:50,718 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-12 10:06:50,718 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-12 10:06:50,820 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 10:06:50" (1/1) ... [2020-10-12 10:06:50,820 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 10:06:50" (1/1) ... [2020-10-12 10:06:50,834 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 10:06:50" (1/1) ... [2020-10-12 10:06:50,835 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 10:06:50" (1/1) ... [2020-10-12 10:06:50,842 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 10:06:50" (1/1) ... [2020-10-12 10:06:50,849 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 10:06:50" (1/1) ... [2020-10-12 10:06:50,851 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 10:06:50" (1/1) ... [2020-10-12 10:06:50,853 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-12 10:06:50,854 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-12 10:06:50,854 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-12 10:06:50,854 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-12 10:06:50,855 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 10:06:50" (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 [2020-10-12 10:06:50,927 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-12 10:06:50,927 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-12 10:06:50,927 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-12 10:06:50,928 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-12 10:06:50,928 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-10-12 10:06:50,928 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-12 10:06:50,928 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-12 10:06:50,928 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-12 10:06:50,929 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-12 10:06:50,929 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-12 10:06:50,929 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-12 10:06:50,929 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-12 10:06:50,930 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-12 10:06:50,930 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-12 10:06:51,243 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-12 10:06:51,244 INFO L295 CfgBuilder]: Removed 3 assume(true) statements. [2020-10-12 10:06:51,249 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.10 10:06:51 BoogieIcfgContainer [2020-10-12 10:06:51,250 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-12 10:06:51,266 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-12 10:06:51,267 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-12 10:06:51,273 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-12 10:06:51,273 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.10 10:06:50" (1/3) ... [2020-10-12 10:06:51,275 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@24cf28c5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.10 10:06:51, skipping insertion in model container [2020-10-12 10:06:51,275 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 10:06:50" (2/3) ... [2020-10-12 10:06:51,276 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@24cf28c5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.10 10:06:51, skipping insertion in model container [2020-10-12 10:06:51,276 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.10 10:06:51" (3/3) ... [2020-10-12 10:06:51,278 INFO L109 eAbstractionObserver]: Analyzing ICFG standard_two_index_07.i [2020-10-12 10:06:51,289 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-12 10:06:51,296 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-12 10:06:51,311 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-12 10:06:51,335 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-10-12 10:06:51,335 INFO L376 AbstractCegarLoop]: Hoare is true [2020-10-12 10:06:51,336 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-12 10:06:51,336 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-12 10:06:51,336 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-12 10:06:51,336 INFO L380 AbstractCegarLoop]: Difference is false [2020-10-12 10:06:51,337 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-12 10:06:51,337 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-12 10:06:51,357 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states. [2020-10-12 10:06:51,363 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-12 10:06:51,363 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 10:06:51,364 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 10:06:51,365 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 10:06:51,371 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 10:06:51,372 INFO L82 PathProgramCache]: Analyzing trace with hash -2029643862, now seen corresponding path program 1 times [2020-10-12 10:06:51,380 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 10:06:51,380 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [161533601] [2020-10-12 10:06:51,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 10:06:51,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:06:51,515 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:06:51,561 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:06:51,733 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:06:51,733 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 23 [2020-10-12 10:06:51,734 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 10:06:51,737 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 239 [2020-10-12 10:06:51,740 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:06:51,740 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 10:06:51,741 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-12 10:06:51,741 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-12 10:06:51,741 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-12 10:06:51,814 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 10:06:51,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:06:51,822 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:06:51,831 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:06:51,831 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 10:06:51,832 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:06:51,832 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-12 10:06:51,833 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:06:51,833 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:06:51,833 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:06:51,834 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:06:51,834 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 10:06:51,845 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 10:06:51,848 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [161533601] [2020-10-12 10:06:51,853 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 10:06:51,854 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-12 10:06:51,855 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [743940489] [2020-10-12 10:06:51,864 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-12 10:06:51,865 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 10:06:51,877 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-12 10:06:51,879 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-12 10:06:51,881 INFO L87 Difference]: Start difference. First operand 24 states. Second operand 4 states. [2020-10-12 10:06:52,069 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 10:06:52,069 INFO L93 Difference]: Finished difference Result 46 states and 65 transitions. [2020-10-12 10:06:52,070 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-12 10:06:52,072 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 15 [2020-10-12 10:06:52,073 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 10:06:52,084 INFO L225 Difference]: With dead ends: 46 [2020-10-12 10:06:52,085 INFO L226 Difference]: Without dead ends: 24 [2020-10-12 10:06:52,089 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-12 10:06:52,106 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2020-10-12 10:06:52,131 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 21. [2020-10-12 10:06:52,132 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2020-10-12 10:06:52,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 23 transitions. [2020-10-12 10:06:52,135 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 23 transitions. Word has length 15 [2020-10-12 10:06:52,136 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 10:06:52,136 INFO L479 AbstractCegarLoop]: Abstraction has 21 states and 23 transitions. [2020-10-12 10:06:52,136 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-12 10:06:52,136 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 23 transitions. [2020-10-12 10:06:52,137 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-10-12 10:06:52,137 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 10:06:52,138 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 10:06:52,138 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-12 10:06:52,138 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 10:06:52,139 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 10:06:52,139 INFO L82 PathProgramCache]: Analyzing trace with hash -59429947, now seen corresponding path program 1 times [2020-10-12 10:06:52,140 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 10:06:52,140 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1635430605] [2020-10-12 10:06:52,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 10:06:52,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:06:52,175 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:06:52,204 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:06:52,453 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:06:52,888 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:06:52,888 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-10-12 10:06:52,889 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-12 10:06:52,889 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 725 [2020-10-12 10:06:52,889 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:06:52,889 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-12 10:06:52,890 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 10:06:52,890 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 13 [2020-10-12 10:06:52,890 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 10:06:53,112 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 10:06:53,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:06:53,115 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:06:53,118 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:06:53,118 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 10:06:53,119 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:06:53,119 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-12 10:06:53,119 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:06:53,119 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:06:53,120 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:06:53,120 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:06:53,120 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 10:06:53,126 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-12 10:06:53,126 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1635430605] [2020-10-12 10:06:53,127 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 10:06:53,127 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-12 10:06:53,127 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1378734872] [2020-10-12 10:06:53,129 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-12 10:06:53,130 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 10:06:53,130 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-12 10:06:53,131 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2020-10-12 10:06:53,131 INFO L87 Difference]: Start difference. First operand 21 states and 23 transitions. Second operand 10 states. [2020-10-12 10:06:53,373 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 10:06:53,374 INFO L93 Difference]: Finished difference Result 35 states and 39 transitions. [2020-10-12 10:06:53,375 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-12 10:06:53,375 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2020-10-12 10:06:53,375 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 10:06:53,377 INFO L225 Difference]: With dead ends: 35 [2020-10-12 10:06:53,377 INFO L226 Difference]: Without dead ends: 33 [2020-10-12 10:06:53,378 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2020-10-12 10:06:53,379 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2020-10-12 10:06:53,387 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 29. [2020-10-12 10:06:53,387 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2020-10-12 10:06:53,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 32 transitions. [2020-10-12 10:06:53,389 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 32 transitions. Word has length 17 [2020-10-12 10:06:53,389 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 10:06:53,389 INFO L479 AbstractCegarLoop]: Abstraction has 29 states and 32 transitions. [2020-10-12 10:06:53,389 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-12 10:06:53,390 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 32 transitions. [2020-10-12 10:06:53,390 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-10-12 10:06:53,391 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 10:06:53,391 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 10:06:53,391 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-12 10:06:53,392 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 10:06:53,392 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 10:06:53,392 INFO L82 PathProgramCache]: Analyzing trace with hash 334778154, now seen corresponding path program 2 times [2020-10-12 10:06:53,392 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 10:06:53,393 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1144961922] [2020-10-12 10:06:53,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 10:06:53,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:06:53,409 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:06:53,425 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:06:53,541 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:06:53,900 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:06:53,900 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 26 [2020-10-12 10:06:53,900 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-12 10:06:53,901 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 495 [2020-10-12 10:06:53,901 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:06:53,902 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-12 10:06:53,902 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 10:06:53,902 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-12 10:06:53,902 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 10:06:54,183 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 10:06:54,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:06:54,187 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:06:54,189 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:06:54,189 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 10:06:54,190 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:06:54,190 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-12 10:06:54,190 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:06:54,190 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:06:54,190 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:06:54,191 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:06:54,191 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:06:54,195 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-12 10:06:54,195 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1144961922] [2020-10-12 10:06:54,195 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 10:06:54,196 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-12 10:06:54,196 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [437631748] [2020-10-12 10:06:54,197 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-12 10:06:54,198 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 10:06:54,198 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-12 10:06:54,200 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2020-10-12 10:06:54,200 INFO L87 Difference]: Start difference. First operand 29 states and 32 transitions. Second operand 11 states. [2020-10-12 10:06:54,630 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 10:06:54,630 INFO L93 Difference]: Finished difference Result 47 states and 53 transitions. [2020-10-12 10:06:54,631 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-12 10:06:54,631 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 18 [2020-10-12 10:06:54,632 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 10:06:54,633 INFO L225 Difference]: With dead ends: 47 [2020-10-12 10:06:54,633 INFO L226 Difference]: Without dead ends: 45 [2020-10-12 10:06:54,635 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=63, Invalid=243, Unknown=0, NotChecked=0, Total=306 [2020-10-12 10:06:54,635 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2020-10-12 10:06:54,643 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 30. [2020-10-12 10:06:54,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-10-12 10:06:54,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 34 transitions. [2020-10-12 10:06:54,645 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 34 transitions. Word has length 18 [2020-10-12 10:06:54,645 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 10:06:54,645 INFO L479 AbstractCegarLoop]: Abstraction has 30 states and 34 transitions. [2020-10-12 10:06:54,645 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-12 10:06:54,646 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 34 transitions. [2020-10-12 10:06:54,647 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-10-12 10:06:54,647 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 10:06:54,647 INFO L422 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 10:06:54,647 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-12 10:06:54,648 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 10:06:54,648 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 10:06:54,648 INFO L82 PathProgramCache]: Analyzing trace with hash -329672603, now seen corresponding path program 3 times [2020-10-12 10:06:54,649 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 10:06:54,649 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1794293039] [2020-10-12 10:06:54,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 10:06:54,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:06:54,663 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:06:54,678 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:06:54,846 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:06:55,153 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:06:55,156 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 27 [2020-10-12 10:06:55,157 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-12 10:06:55,157 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 494 [2020-10-12 10:06:55,157 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:06:55,158 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-12 10:06:55,158 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 10:06:55,158 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 15 [2020-10-12 10:06:55,159 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 10:06:55,368 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 10:06:55,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:06:55,371 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:06:55,374 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:06:55,374 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 10:06:55,375 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:06:55,376 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-12 10:06:55,376 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:06:55,376 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:06:55,378 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:06:55,379 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:06:55,379 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-12 10:06:55,385 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-12 10:06:55,387 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1794293039] [2020-10-12 10:06:55,388 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 10:06:55,388 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-12 10:06:55,388 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [960802291] [2020-10-12 10:06:55,390 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-12 10:06:55,390 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 10:06:55,391 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-12 10:06:55,392 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2020-10-12 10:06:55,393 INFO L87 Difference]: Start difference. First operand 30 states and 34 transitions. Second operand 12 states. [2020-10-12 10:06:55,700 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 10:06:55,700 INFO L93 Difference]: Finished difference Result 39 states and 43 transitions. [2020-10-12 10:06:55,701 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-12 10:06:55,701 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 19 [2020-10-12 10:06:55,701 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 10:06:55,710 INFO L225 Difference]: With dead ends: 39 [2020-10-12 10:06:55,711 INFO L226 Difference]: Without dead ends: 37 [2020-10-12 10:06:55,712 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=49, Invalid=191, Unknown=0, NotChecked=0, Total=240 [2020-10-12 10:06:55,713 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2020-10-12 10:06:55,722 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 27. [2020-10-12 10:06:55,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-10-12 10:06:55,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 29 transitions. [2020-10-12 10:06:55,726 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 29 transitions. Word has length 19 [2020-10-12 10:06:55,726 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 10:06:55,726 INFO L479 AbstractCegarLoop]: Abstraction has 27 states and 29 transitions. [2020-10-12 10:06:55,727 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-12 10:06:55,727 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 29 transitions. [2020-10-12 10:06:55,728 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-12 10:06:55,728 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 10:06:55,728 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 10:06:55,729 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-12 10:06:55,729 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 10:06:55,729 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 10:06:55,729 INFO L82 PathProgramCache]: Analyzing trace with hash 956525676, now seen corresponding path program 1 times [2020-10-12 10:06:55,730 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 10:06:55,730 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1941718674] [2020-10-12 10:06:55,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 10:06:55,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:06:55,750 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:06:55,764 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:06:55,922 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:06:55,922 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 34 [2020-10-12 10:06:55,922 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 10:06:55,923 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 176 [2020-10-12 10:06:55,923 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:06:55,923 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-12 10:06:55,923 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-12 10:06:55,924 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 3 [2020-10-12 10:06:55,924 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 10:06:55,956 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 10:06:55,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:06:55,960 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:06:55,963 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:06:55,963 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 10:06:55,964 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:06:55,964 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-12 10:06:55,964 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:06:55,965 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:06:55,965 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:06:55,981 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:06:55,981 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 16 [2020-10-12 10:06:55,985 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2020-10-12 10:06:55,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:06:55,989 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:06:55,992 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:06:55,992 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:06:55,993 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:06:55,993 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-12 10:06:55,993 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:06:55,994 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:06:55,994 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-12 10:06:55,994 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:06:55,995 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 10:06:55,999 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-12 10:06:56,000 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1941718674] [2020-10-12 10:06:56,000 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 10:06:56,001 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-12 10:06:56,001 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1740645415] [2020-10-12 10:06:56,003 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-12 10:06:56,003 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 10:06:56,004 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-12 10:06:56,004 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-12 10:06:56,004 INFO L87 Difference]: Start difference. First operand 27 states and 29 transitions. Second operand 5 states. [2020-10-12 10:06:56,108 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 10:06:56,108 INFO L93 Difference]: Finished difference Result 52 states and 58 transitions. [2020-10-12 10:06:56,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-12 10:06:56,109 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 24 [2020-10-12 10:06:56,110 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 10:06:56,111 INFO L225 Difference]: With dead ends: 52 [2020-10-12 10:06:56,111 INFO L226 Difference]: Without dead ends: 33 [2020-10-12 10:06:56,112 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-12 10:06:56,113 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2020-10-12 10:06:56,119 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 29. [2020-10-12 10:06:56,119 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2020-10-12 10:06:56,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 31 transitions. [2020-10-12 10:06:56,121 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 31 transitions. Word has length 24 [2020-10-12 10:06:56,121 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 10:06:56,121 INFO L479 AbstractCegarLoop]: Abstraction has 29 states and 31 transitions. [2020-10-12 10:06:56,121 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-12 10:06:56,122 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 31 transitions. [2020-10-12 10:06:56,122 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-12 10:06:56,123 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 10:06:56,123 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 10:06:56,123 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-12 10:06:56,124 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 10:06:56,124 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 10:06:56,124 INFO L82 PathProgramCache]: Analyzing trace with hash 1983526027, now seen corresponding path program 2 times [2020-10-12 10:06:56,124 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 10:06:56,125 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1226325591] [2020-10-12 10:06:56,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 10:06:56,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:06:56,138 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:06:56,155 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:06:56,417 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:06:56,653 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:06:56,654 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 36 [2020-10-12 10:06:56,654 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-12 10:06:56,654 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 519 [2020-10-12 10:06:56,654 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:06:56,654 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-12 10:06:56,655 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 10:06:56,655 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-10-12 10:06:56,655 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:06:56,804 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 10:06:56,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:06:56,808 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:06:56,809 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:06:56,810 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 10:06:56,810 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:06:56,810 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 10:06:56,811 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:06:56,811 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:06:56,811 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:06:56,812 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:06:56,812 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 10:06:56,814 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-10-12 10:06:56,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:06:56,817 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:06:56,822 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:06:56,822 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:06:56,823 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:06:56,823 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-12 10:06:56,823 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:06:56,823 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 10:06:56,824 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:06:56,824 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-12 10:06:56,824 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 10:06:56,831 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-12 10:06:56,832 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1226325591] [2020-10-12 10:06:56,832 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 10:06:56,832 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-12 10:06:56,833 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1974071273] [2020-10-12 10:06:56,833 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-12 10:06:56,838 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 10:06:56,839 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-12 10:06:56,839 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2020-10-12 10:06:56,839 INFO L87 Difference]: Start difference. First operand 29 states and 31 transitions. Second operand 12 states. [2020-10-12 10:06:57,092 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 10:06:57,093 INFO L93 Difference]: Finished difference Result 46 states and 51 transitions. [2020-10-12 10:06:57,093 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-12 10:06:57,094 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 26 [2020-10-12 10:06:57,094 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 10:06:57,095 INFO L225 Difference]: With dead ends: 46 [2020-10-12 10:06:57,095 INFO L226 Difference]: Without dead ends: 44 [2020-10-12 10:06:57,096 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=48, Invalid=224, Unknown=0, NotChecked=0, Total=272 [2020-10-12 10:06:57,096 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2020-10-12 10:06:57,104 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 40. [2020-10-12 10:06:57,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-10-12 10:06:57,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 44 transitions. [2020-10-12 10:06:57,106 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 44 transitions. Word has length 26 [2020-10-12 10:06:57,106 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 10:06:57,106 INFO L479 AbstractCegarLoop]: Abstraction has 40 states and 44 transitions. [2020-10-12 10:06:57,106 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-12 10:06:57,107 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 44 transitions. [2020-10-12 10:06:57,108 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-12 10:06:57,109 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 10:06:57,109 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 10:06:57,109 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-12 10:06:57,109 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 10:06:57,110 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 10:06:57,110 INFO L82 PathProgramCache]: Analyzing trace with hash -1287661272, now seen corresponding path program 3 times [2020-10-12 10:06:57,110 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 10:06:57,110 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [973138473] [2020-10-12 10:06:57,111 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 10:06:57,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:06:57,124 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:06:57,142 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:06:57,363 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:06:57,931 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:06:57,932 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 37 [2020-10-12 10:06:57,932 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-12 10:06:57,932 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 810 [2020-10-12 10:06:57,933 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:06:57,933 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-12 10:06:57,933 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 10:06:57,934 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 25 [2020-10-12 10:06:57,934 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 10:06:58,158 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 10:06:58,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:06:58,160 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:06:58,162 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:06:58,162 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 10:06:58,163 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:06:58,163 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 10:06:58,163 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:06:58,164 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:06:58,164 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:06:58,164 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:06:58,165 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 10:06:58,166 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2020-10-12 10:06:58,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:06:58,170 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:06:58,174 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:06:58,174 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:06:58,174 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:06:58,175 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-12 10:06:58,175 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:06:58,175 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 10:06:58,175 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:06:58,175 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-12 10:06:58,176 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:06:58,182 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 8 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-12 10:06:58,183 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [973138473] [2020-10-12 10:06:58,183 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 10:06:58,183 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-12 10:06:58,184 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1281780255] [2020-10-12 10:06:58,185 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-12 10:06:58,185 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 10:06:58,185 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-12 10:06:58,186 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=131, Unknown=0, NotChecked=0, Total=156 [2020-10-12 10:06:58,186 INFO L87 Difference]: Start difference. First operand 40 states and 44 transitions. Second operand 13 states. [2020-10-12 10:06:58,707 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 10:06:58,708 INFO L93 Difference]: Finished difference Result 60 states and 68 transitions. [2020-10-12 10:06:58,710 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-12 10:06:58,710 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 27 [2020-10-12 10:06:58,711 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 10:06:58,713 INFO L225 Difference]: With dead ends: 60 [2020-10-12 10:06:58,713 INFO L226 Difference]: Without dead ends: 58 [2020-10-12 10:06:58,717 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=59, Invalid=283, Unknown=0, NotChecked=0, Total=342 [2020-10-12 10:06:58,718 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2020-10-12 10:06:58,743 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 41. [2020-10-12 10:06:58,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2020-10-12 10:06:58,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 46 transitions. [2020-10-12 10:06:58,748 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 46 transitions. Word has length 27 [2020-10-12 10:06:58,749 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 10:06:58,749 INFO L479 AbstractCegarLoop]: Abstraction has 41 states and 46 transitions. [2020-10-12 10:06:58,749 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-12 10:06:58,749 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 46 transitions. [2020-10-12 10:06:58,750 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-12 10:06:58,750 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 10:06:58,750 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 10:06:58,751 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-12 10:06:58,751 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 10:06:58,753 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 10:06:58,754 INFO L82 PathProgramCache]: Analyzing trace with hash 384747563, now seen corresponding path program 4 times [2020-10-12 10:06:58,754 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 10:06:58,754 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1566239717] [2020-10-12 10:06:58,754 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 10:06:58,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:06:58,770 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:06:58,784 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:06:59,126 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:06:59,813 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:06:59,813 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 38 [2020-10-12 10:06:59,813 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-12 10:06:59,814 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1046 [2020-10-12 10:06:59,814 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:06:59,814 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-12 10:06:59,815 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 10:06:59,816 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-12 10:06:59,817 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-12 10:07:00,069 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 10:07:00,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:07:00,072 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:07:00,075 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:07:00,075 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 10:07:00,076 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:07:00,076 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-12 10:07:00,076 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:07:00,076 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:07:00,077 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:07:00,077 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:07:00,077 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 10:07:00,079 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2020-10-12 10:07:00,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:07:00,083 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:07:00,088 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:07:00,088 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:07:00,088 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:07:00,088 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-12 10:07:00,089 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:07:00,089 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 10:07:00,089 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:07:00,089 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-12 10:07:00,090 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:07:00,105 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 2 proven. 12 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-12 10:07:00,106 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1566239717] [2020-10-12 10:07:00,107 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 10:07:00,107 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-12 10:07:00,107 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [598471033] [2020-10-12 10:07:00,108 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-12 10:07:00,108 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 10:07:00,109 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-12 10:07:00,109 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=152, Unknown=0, NotChecked=0, Total=182 [2020-10-12 10:07:00,109 INFO L87 Difference]: Start difference. First operand 41 states and 46 transitions. Second operand 14 states. [2020-10-12 10:07:00,442 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 10:07:00,442 INFO L93 Difference]: Finished difference Result 51 states and 56 transitions. [2020-10-12 10:07:00,443 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-12 10:07:00,443 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 28 [2020-10-12 10:07:00,444 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 10:07:00,444 INFO L225 Difference]: With dead ends: 51 [2020-10-12 10:07:00,445 INFO L226 Difference]: Without dead ends: 49 [2020-10-12 10:07:00,445 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=60, Invalid=320, Unknown=0, NotChecked=0, Total=380 [2020-10-12 10:07:00,446 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2020-10-12 10:07:00,451 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 36. [2020-10-12 10:07:00,452 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-10-12 10:07:00,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 38 transitions. [2020-10-12 10:07:00,453 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 38 transitions. Word has length 28 [2020-10-12 10:07:00,453 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 10:07:00,453 INFO L479 AbstractCegarLoop]: Abstraction has 36 states and 38 transitions. [2020-10-12 10:07:00,453 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-12 10:07:00,454 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 38 transitions. [2020-10-12 10:07:00,454 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-10-12 10:07:00,455 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 10:07:00,455 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 10:07:00,455 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-12 10:07:00,455 INFO L427 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 10:07:00,455 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 10:07:00,456 INFO L82 PathProgramCache]: Analyzing trace with hash -1993467674, now seen corresponding path program 5 times [2020-10-12 10:07:00,456 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 10:07:00,456 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1020172100] [2020-10-12 10:07:00,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 10:07:00,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:07:00,468 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:07:00,487 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:07:00,760 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:07:00,760 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 45 [2020-10-12 10:07:00,761 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 10:07:00,761 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 295 [2020-10-12 10:07:00,761 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:07:00,761 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-12 10:07:00,761 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 10:07:00,762 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 4 [2020-10-12 10:07:00,762 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:07:00,787 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 10:07:00,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:07:00,789 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:07:00,791 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:07:00,791 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 10:07:00,791 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:07:00,792 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 10:07:00,792 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:07:00,792 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:07:00,792 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:07:00,793 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:07:00,793 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:07:00,794 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-10-12 10:07:00,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:07:00,796 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:07:00,797 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:07:00,797 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:07:00,798 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:07:00,798 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 10:07:00,798 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:07:00,798 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:07:00,798 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-12 10:07:00,799 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:07:00,799 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:07:00,800 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2020-10-12 10:07:00,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:07:00,802 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:07:00,803 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:07:00,803 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:07:00,803 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:07:00,804 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 10:07:00,804 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:07:00,804 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:07:00,804 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-12 10:07:00,804 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:07:00,805 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:07:00,807 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2020-10-12 10:07:00,807 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1020172100] [2020-10-12 10:07:00,808 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 10:07:00,808 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-12 10:07:00,808 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1667921340] [2020-10-12 10:07:00,809 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-12 10:07:00,809 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 10:07:00,809 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-12 10:07:00,809 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-12 10:07:00,809 INFO L87 Difference]: Start difference. First operand 36 states and 38 transitions. Second operand 6 states. [2020-10-12 10:07:00,861 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 10:07:00,861 INFO L93 Difference]: Finished difference Result 64 states and 68 transitions. [2020-10-12 10:07:00,861 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-12 10:07:00,862 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 33 [2020-10-12 10:07:00,862 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 10:07:00,862 INFO L225 Difference]: With dead ends: 64 [2020-10-12 10:07:00,863 INFO L226 Difference]: Without dead ends: 37 [2020-10-12 10:07:00,863 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-12 10:07:00,864 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2020-10-12 10:07:00,869 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2020-10-12 10:07:00,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2020-10-12 10:07:00,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 39 transitions. [2020-10-12 10:07:00,870 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 39 transitions. Word has length 33 [2020-10-12 10:07:00,870 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 10:07:00,870 INFO L479 AbstractCegarLoop]: Abstraction has 37 states and 39 transitions. [2020-10-12 10:07:00,871 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-12 10:07:00,871 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 39 transitions. [2020-10-12 10:07:00,871 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-10-12 10:07:00,872 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 10:07:00,872 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 10:07:00,872 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-12 10:07:00,872 INFO L427 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 10:07:00,872 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 10:07:00,873 INFO L82 PathProgramCache]: Analyzing trace with hash -1864152054, now seen corresponding path program 6 times [2020-10-12 10:07:00,873 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 10:07:00,873 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [129769430] [2020-10-12 10:07:00,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 10:07:00,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:07:00,884 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:07:00,901 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:07:01,274 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:07:01,274 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 46 [2020-10-12 10:07:01,274 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 10:07:01,274 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 392 [2020-10-12 10:07:01,275 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:07:01,275 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-12 10:07:01,275 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 10:07:01,275 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 5 [2020-10-12 10:07:01,275 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:07:01,307 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 10:07:01,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:07:01,309 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:07:01,310 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:07:01,311 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 10:07:01,311 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:07:01,311 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 10:07:01,311 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:07:01,311 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:07:01,312 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:07:01,312 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:07:01,312 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:07:01,313 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2020-10-12 10:07:01,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:07:01,315 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:07:01,316 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:07:01,317 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:07:01,317 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:07:01,317 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 10:07:01,317 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:07:01,317 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:07:01,318 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-12 10:07:01,318 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:07:01,318 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:07:01,319 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-10-12 10:07:01,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:07:01,321 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:07:01,322 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:07:01,322 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:07:01,322 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:07:01,323 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 10:07:01,323 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:07:01,323 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:07:01,323 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-12 10:07:01,323 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:07:01,324 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:07:01,326 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 4 proven. 6 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2020-10-12 10:07:01,326 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [129769430] [2020-10-12 10:07:01,326 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 10:07:01,327 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-12 10:07:01,327 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [861138793] [2020-10-12 10:07:01,327 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-12 10:07:01,327 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 10:07:01,328 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-12 10:07:01,328 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-10-12 10:07:01,328 INFO L87 Difference]: Start difference. First operand 37 states and 39 transitions. Second operand 7 states. [2020-10-12 10:07:01,391 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 10:07:01,391 INFO L93 Difference]: Finished difference Result 65 states and 69 transitions. [2020-10-12 10:07:01,391 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-12 10:07:01,392 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 34 [2020-10-12 10:07:01,392 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 10:07:01,392 INFO L225 Difference]: With dead ends: 65 [2020-10-12 10:07:01,392 INFO L226 Difference]: Without dead ends: 38 [2020-10-12 10:07:01,393 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-10-12 10:07:01,394 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2020-10-12 10:07:01,399 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2020-10-12 10:07:01,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2020-10-12 10:07:01,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 40 transitions. [2020-10-12 10:07:01,400 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 40 transitions. Word has length 34 [2020-10-12 10:07:01,400 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 10:07:01,400 INFO L479 AbstractCegarLoop]: Abstraction has 38 states and 40 transitions. [2020-10-12 10:07:01,400 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-12 10:07:01,401 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 40 transitions. [2020-10-12 10:07:01,401 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-10-12 10:07:01,402 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 10:07:01,402 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 10:07:01,402 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-12 10:07:01,402 INFO L427 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 10:07:01,402 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 10:07:01,403 INFO L82 PathProgramCache]: Analyzing trace with hash 2144632166, now seen corresponding path program 7 times [2020-10-12 10:07:01,403 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 10:07:01,403 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [491954702] [2020-10-12 10:07:01,403 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 10:07:01,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:07:01,418 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:07:01,438 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:07:01,848 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:07:01,848 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 47 [2020-10-12 10:07:01,849 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 10:07:01,849 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 435 [2020-10-12 10:07:01,849 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:07:01,849 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-12 10:07:01,849 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 10:07:01,850 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-12 10:07:01,850 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:07:01,894 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 10:07:01,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:07:01,896 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:07:01,897 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:07:01,897 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 10:07:01,897 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:07:01,898 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 10:07:01,898 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:07:01,898 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:07:01,898 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:07:01,898 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:07:01,899 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:07:01,900 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2020-10-12 10:07:01,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:07:01,901 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:07:01,903 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:07:01,903 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:07:01,903 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:07:01,903 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 10:07:01,903 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:07:01,904 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:07:01,904 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-12 10:07:01,904 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:07:01,904 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:07:01,906 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2020-10-12 10:07:01,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:07:01,907 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:07:01,908 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:07:01,908 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:07:01,909 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:07:01,909 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 10:07:01,909 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:07:01,909 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:07:01,909 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-12 10:07:01,910 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:07:01,910 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:07:01,912 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 4 proven. 10 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2020-10-12 10:07:01,913 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [491954702] [2020-10-12 10:07:01,913 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 10:07:01,913 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-12 10:07:01,913 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [296981373] [2020-10-12 10:07:01,914 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-12 10:07:01,914 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 10:07:01,914 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-12 10:07:01,915 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-10-12 10:07:01,915 INFO L87 Difference]: Start difference. First operand 38 states and 40 transitions. Second operand 8 states. [2020-10-12 10:07:01,986 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 10:07:01,987 INFO L93 Difference]: Finished difference Result 66 states and 70 transitions. [2020-10-12 10:07:01,987 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-12 10:07:01,987 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 35 [2020-10-12 10:07:01,988 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 10:07:01,988 INFO L225 Difference]: With dead ends: 66 [2020-10-12 10:07:01,988 INFO L226 Difference]: Without dead ends: 39 [2020-10-12 10:07:01,989 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-10-12 10:07:01,990 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2020-10-12 10:07:01,995 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2020-10-12 10:07:01,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2020-10-12 10:07:01,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 41 transitions. [2020-10-12 10:07:01,996 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 41 transitions. Word has length 35 [2020-10-12 10:07:01,996 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 10:07:01,997 INFO L479 AbstractCegarLoop]: Abstraction has 39 states and 41 transitions. [2020-10-12 10:07:01,997 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-12 10:07:01,997 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 41 transitions. [2020-10-12 10:07:01,998 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-10-12 10:07:01,998 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 10:07:01,998 INFO L422 BasicCegarLoop]: trace histogram [5, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 10:07:01,998 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-12 10:07:01,999 INFO L427 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 10:07:01,999 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 10:07:01,999 INFO L82 PathProgramCache]: Analyzing trace with hash 1862891402, now seen corresponding path program 8 times [2020-10-12 10:07:01,999 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 10:07:02,000 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1090130290] [2020-10-12 10:07:02,000 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 10:07:02,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:07:02,016 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:07:02,033 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:07:02,625 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:07:02,626 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 48 [2020-10-12 10:07:02,626 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 10:07:02,626 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 615 [2020-10-12 10:07:02,626 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:07:02,627 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-12 10:07:02,627 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 10:07:02,627 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-12 10:07:02,627 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:07:02,678 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 10:07:02,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:07:02,680 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:07:02,682 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:07:02,682 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 10:07:02,683 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:07:02,683 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 10:07:02,684 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:07:02,684 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:07:02,684 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:07:02,684 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:07:02,684 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:07:02,686 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-10-12 10:07:02,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:07:02,688 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:07:02,695 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:07:02,695 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:07:02,695 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:07:02,696 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-12 10:07:02,696 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:07:02,696 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:07:02,696 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-12 10:07:02,696 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:07:02,697 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:07:02,698 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2020-10-12 10:07:02,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:07:02,699 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:07:02,700 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:07:02,701 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:07:02,701 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:07:02,701 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 10:07:02,701 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:07:02,701 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:07:02,702 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-12 10:07:02,702 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:07:02,702 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:07:02,704 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 4 proven. 15 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2020-10-12 10:07:02,705 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1090130290] [2020-10-12 10:07:02,705 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 10:07:02,705 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-12 10:07:02,705 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1514473772] [2020-10-12 10:07:02,706 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-12 10:07:02,706 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 10:07:02,706 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-12 10:07:02,707 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-10-12 10:07:02,707 INFO L87 Difference]: Start difference. First operand 39 states and 41 transitions. Second operand 9 states. [2020-10-12 10:07:02,766 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 10:07:02,766 INFO L93 Difference]: Finished difference Result 67 states and 71 transitions. [2020-10-12 10:07:02,767 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-12 10:07:02,767 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 36 [2020-10-12 10:07:02,767 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 10:07:02,768 INFO L225 Difference]: With dead ends: 67 [2020-10-12 10:07:02,768 INFO L226 Difference]: Without dead ends: 40 [2020-10-12 10:07:02,770 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-10-12 10:07:02,770 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2020-10-12 10:07:02,781 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2020-10-12 10:07:02,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-10-12 10:07:02,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 42 transitions. [2020-10-12 10:07:02,782 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 42 transitions. Word has length 36 [2020-10-12 10:07:02,782 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 10:07:02,783 INFO L479 AbstractCegarLoop]: Abstraction has 40 states and 42 transitions. [2020-10-12 10:07:02,783 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-12 10:07:02,783 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 42 transitions. [2020-10-12 10:07:02,785 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-10-12 10:07:02,785 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 10:07:02,786 INFO L422 BasicCegarLoop]: trace histogram [6, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 10:07:02,786 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-12 10:07:02,786 INFO L427 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 10:07:02,786 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 10:07:02,787 INFO L82 PathProgramCache]: Analyzing trace with hash 1718862310, now seen corresponding path program 9 times [2020-10-12 10:07:02,788 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 10:07:02,789 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1296508956] [2020-10-12 10:07:02,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 10:07:02,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:07:02,810 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:07:02,824 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:07:03,583 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:07:03,584 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 49 [2020-10-12 10:07:03,584 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 10:07:03,584 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 779 [2020-10-12 10:07:03,585 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:07:03,585 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-12 10:07:03,585 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 10:07:03,585 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-12 10:07:03,585 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:07:03,652 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 10:07:03,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:07:03,654 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:07:03,655 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:07:03,655 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 10:07:03,655 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:07:03,655 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 10:07:03,656 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:07:03,656 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:07:03,656 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:07:03,656 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:07:03,657 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:07:03,658 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2020-10-12 10:07:03,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:07:03,659 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:07:03,660 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:07:03,660 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:07:03,661 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:07:03,661 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 10:07:03,661 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:07:03,661 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:07:03,661 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-12 10:07:03,662 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:07:03,662 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:07:03,663 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2020-10-12 10:07:03,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:07:03,665 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:07:03,666 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:07:03,666 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:07:03,666 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:07:03,667 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 10:07:03,667 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:07:03,667 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:07:03,667 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-12 10:07:03,668 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:07:03,668 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:07:03,671 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 4 proven. 21 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2020-10-12 10:07:03,671 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1296508956] [2020-10-12 10:07:03,671 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 10:07:03,672 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-12 10:07:03,672 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [234959259] [2020-10-12 10:07:03,672 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-12 10:07:03,673 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 10:07:03,674 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-12 10:07:03,674 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2020-10-12 10:07:03,674 INFO L87 Difference]: Start difference. First operand 40 states and 42 transitions. Second operand 10 states. [2020-10-12 10:07:03,769 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 10:07:03,769 INFO L93 Difference]: Finished difference Result 68 states and 72 transitions. [2020-10-12 10:07:03,769 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-12 10:07:03,770 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 37 [2020-10-12 10:07:03,770 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 10:07:03,770 INFO L225 Difference]: With dead ends: 68 [2020-10-12 10:07:03,771 INFO L226 Difference]: Without dead ends: 41 [2020-10-12 10:07:03,771 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2020-10-12 10:07:03,772 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2020-10-12 10:07:03,779 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2020-10-12 10:07:03,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2020-10-12 10:07:03,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 43 transitions. [2020-10-12 10:07:03,781 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 43 transitions. Word has length 37 [2020-10-12 10:07:03,782 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 10:07:03,782 INFO L479 AbstractCegarLoop]: Abstraction has 41 states and 43 transitions. [2020-10-12 10:07:03,782 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-12 10:07:03,782 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 43 transitions. [2020-10-12 10:07:03,783 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-10-12 10:07:03,784 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 10:07:03,784 INFO L422 BasicCegarLoop]: trace histogram [7, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 10:07:03,784 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-12 10:07:03,784 INFO L427 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 10:07:03,784 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 10:07:03,785 INFO L82 PathProgramCache]: Analyzing trace with hash 1548927754, now seen corresponding path program 10 times [2020-10-12 10:07:03,785 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 10:07:03,788 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [144447791] [2020-10-12 10:07:03,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 10:07:03,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:07:03,807 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:07:03,824 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:07:04,635 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:07:04,635 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 50 [2020-10-12 10:07:04,635 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 10:07:04,636 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 835 [2020-10-12 10:07:04,636 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:07:04,636 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-12 10:07:04,636 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 10:07:04,636 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 9 [2020-10-12 10:07:04,637 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:07:04,707 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 10:07:04,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:07:04,709 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:07:04,711 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:07:04,711 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 10:07:04,711 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:07:04,712 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 10:07:04,712 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:07:04,712 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:07:04,712 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:07:04,713 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:07:04,713 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:07:04,714 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2020-10-12 10:07:04,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:07:04,716 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:07:04,717 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:07:04,717 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:07:04,717 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:07:04,718 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 10:07:04,718 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:07:04,718 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:07:04,718 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-12 10:07:04,719 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:07:04,719 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:07:04,720 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2020-10-12 10:07:04,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:07:04,722 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:07:04,723 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:07:04,723 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:07:04,724 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:07:04,724 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 10:07:04,724 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:07:04,725 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:07:04,725 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-12 10:07:04,725 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:07:04,725 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 10:07:04,728 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 4 proven. 28 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2020-10-12 10:07:04,728 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [144447791] [2020-10-12 10:07:04,729 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 10:07:04,729 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-12 10:07:04,729 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1598721222] [2020-10-12 10:07:04,729 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-12 10:07:04,730 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 10:07:04,730 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-12 10:07:04,730 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2020-10-12 10:07:04,730 INFO L87 Difference]: Start difference. First operand 41 states and 43 transitions. Second operand 11 states. [2020-10-12 10:07:04,833 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 10:07:04,833 INFO L93 Difference]: Finished difference Result 69 states and 73 transitions. [2020-10-12 10:07:04,833 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-12 10:07:04,834 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 38 [2020-10-12 10:07:04,834 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 10:07:04,834 INFO L225 Difference]: With dead ends: 69 [2020-10-12 10:07:04,835 INFO L226 Difference]: Without dead ends: 42 [2020-10-12 10:07:04,837 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2020-10-12 10:07:04,837 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-10-12 10:07:04,848 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2020-10-12 10:07:04,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-10-12 10:07:04,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 44 transitions. [2020-10-12 10:07:04,849 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 44 transitions. Word has length 38 [2020-10-12 10:07:04,849 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 10:07:04,849 INFO L479 AbstractCegarLoop]: Abstraction has 42 states and 44 transitions. [2020-10-12 10:07:04,849 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-12 10:07:04,850 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 44 transitions. [2020-10-12 10:07:04,852 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-10-12 10:07:04,852 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 10:07:04,852 INFO L422 BasicCegarLoop]: trace histogram [8, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 10:07:04,852 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-12 10:07:04,853 INFO L427 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 10:07:04,853 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 10:07:04,853 INFO L82 PathProgramCache]: Analyzing trace with hash 575923814, now seen corresponding path program 11 times [2020-10-12 10:07:04,853 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 10:07:04,854 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1687938969] [2020-10-12 10:07:04,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 10:07:04,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:07:04,875 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:07:04,892 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:07:05,919 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:07:05,920 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 51 [2020-10-12 10:07:05,920 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 10:07:05,920 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1053 [2020-10-12 10:07:05,920 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:07:05,921 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-12 10:07:05,921 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 10:07:05,921 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-12 10:07:05,921 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:07:06,008 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 10:07:06,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:07:06,010 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:07:06,012 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:07:06,012 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 10:07:06,012 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:07:06,013 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 10:07:06,013 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:07:06,013 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:07:06,013 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:07:06,013 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:07:06,014 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:07:06,015 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2020-10-12 10:07:06,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:07:06,018 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:07:06,019 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:07:06,019 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:07:06,020 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:07:06,020 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 10:07:06,020 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:07:06,020 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:07:06,021 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-12 10:07:06,021 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:07:06,021 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:07:06,023 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2020-10-12 10:07:06,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:07:06,025 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:07:06,026 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:07:06,026 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:07:06,027 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:07:06,027 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 10:07:06,027 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:07:06,027 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:07:06,028 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-12 10:07:06,028 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:07:06,028 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:07:06,032 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 4 proven. 36 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2020-10-12 10:07:06,032 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1687938969] [2020-10-12 10:07:06,032 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 10:07:06,033 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-12 10:07:06,033 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [568149800] [2020-10-12 10:07:06,034 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-12 10:07:06,034 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 10:07:06,035 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-12 10:07:06,035 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2020-10-12 10:07:06,036 INFO L87 Difference]: Start difference. First operand 42 states and 44 transitions. Second operand 12 states. [2020-10-12 10:07:06,175 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 10:07:06,175 INFO L93 Difference]: Finished difference Result 71 states and 75 transitions. [2020-10-12 10:07:06,176 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-12 10:07:06,176 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 39 [2020-10-12 10:07:06,177 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 10:07:06,178 INFO L225 Difference]: With dead ends: 71 [2020-10-12 10:07:06,178 INFO L226 Difference]: Without dead ends: 44 [2020-10-12 10:07:06,182 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2020-10-12 10:07:06,182 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2020-10-12 10:07:06,194 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 43. [2020-10-12 10:07:06,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2020-10-12 10:07:06,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 45 transitions. [2020-10-12 10:07:06,195 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 45 transitions. Word has length 39 [2020-10-12 10:07:06,196 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 10:07:06,196 INFO L479 AbstractCegarLoop]: Abstraction has 43 states and 45 transitions. [2020-10-12 10:07:06,196 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-12 10:07:06,196 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 45 transitions. [2020-10-12 10:07:06,197 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-10-12 10:07:06,197 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 10:07:06,197 INFO L422 BasicCegarLoop]: trace histogram [9, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 10:07:06,197 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-12 10:07:06,198 INFO L427 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 10:07:06,198 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 10:07:06,198 INFO L82 PathProgramCache]: Analyzing trace with hash 477572746, now seen corresponding path program 12 times [2020-10-12 10:07:06,198 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 10:07:06,199 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [256115922] [2020-10-12 10:07:06,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 10:07:06,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:07:06,223 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:07:06,245 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:07:07,322 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:07:07,323 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 52 [2020-10-12 10:07:07,323 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 10:07:07,323 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1108 [2020-10-12 10:07:07,324 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:07:07,324 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-12 10:07:07,324 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 10:07:07,324 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 11 [2020-10-12 10:07:07,324 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:07:07,437 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 10:07:07,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:07:07,439 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:07:07,441 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:07:07,442 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 10:07:07,442 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:07:07,442 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 10:07:07,442 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:07:07,443 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:07:07,443 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:07:07,443 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:07:07,443 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:07:07,445 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2020-10-12 10:07:07,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:07:07,446 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:07:07,449 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:07:07,449 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:07:07,449 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:07:07,450 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 10:07:07,450 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:07:07,450 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:07:07,450 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-12 10:07:07,451 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:07:07,451 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:07:07,454 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2020-10-12 10:07:07,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:07:07,458 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:07:07,459 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:07:07,459 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:07:07,459 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:07:07,460 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-12 10:07:07,460 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:07:07,460 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:07:07,460 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-12 10:07:07,461 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:07:07,461 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:07:07,464 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 4 proven. 45 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2020-10-12 10:07:07,464 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [256115922] [2020-10-12 10:07:07,467 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 10:07:07,467 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-12 10:07:07,467 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [406258265] [2020-10-12 10:07:07,468 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-12 10:07:07,468 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 10:07:07,469 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-12 10:07:07,469 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2020-10-12 10:07:07,469 INFO L87 Difference]: Start difference. First operand 43 states and 45 transitions. Second operand 13 states. [2020-10-12 10:07:07,584 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 10:07:07,584 INFO L93 Difference]: Finished difference Result 72 states and 76 transitions. [2020-10-12 10:07:07,585 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-12 10:07:07,585 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 40 [2020-10-12 10:07:07,585 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 10:07:07,586 INFO L225 Difference]: With dead ends: 72 [2020-10-12 10:07:07,586 INFO L226 Difference]: Without dead ends: 45 [2020-10-12 10:07:07,587 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2020-10-12 10:07:07,587 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2020-10-12 10:07:07,592 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 44. [2020-10-12 10:07:07,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2020-10-12 10:07:07,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 46 transitions. [2020-10-12 10:07:07,594 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 46 transitions. Word has length 40 [2020-10-12 10:07:07,594 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 10:07:07,594 INFO L479 AbstractCegarLoop]: Abstraction has 44 states and 46 transitions. [2020-10-12 10:07:07,594 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-12 10:07:07,594 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 46 transitions. [2020-10-12 10:07:07,595 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-10-12 10:07:07,595 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 10:07:07,595 INFO L422 BasicCegarLoop]: trace histogram [10, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 10:07:07,595 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-12 10:07:07,595 INFO L427 AbstractCegarLoop]: === Iteration 17 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 10:07:07,596 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 10:07:07,596 INFO L82 PathProgramCache]: Analyzing trace with hash 1723656934, now seen corresponding path program 13 times [2020-10-12 10:07:07,596 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 10:07:07,596 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [985351248] [2020-10-12 10:07:07,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 10:07:07,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:07:07,617 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:07:07,639 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:07:08,899 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:07:08,900 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 53 [2020-10-12 10:07:08,900 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 10:07:08,900 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1290 [2020-10-12 10:07:08,901 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:07:08,901 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-12 10:07:08,901 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 10:07:08,902 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-12 10:07:08,902 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 10:07:09,035 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 10:07:09,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:07:09,037 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:07:09,039 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:07:09,039 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 10:07:09,040 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:07:09,040 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 10:07:09,040 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:07:09,040 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:07:09,041 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:07:09,041 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:07:09,041 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 10:07:09,043 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-10-12 10:07:09,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:07:09,046 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:07:09,047 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:07:09,048 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:07:09,048 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:07:09,048 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 10:07:09,049 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:07:09,049 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:07:09,049 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-12 10:07:09,050 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:07:09,050 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 10:07:09,051 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2020-10-12 10:07:09,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:07:09,054 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:07:09,055 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:07:09,055 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:07:09,056 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:07:09,056 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 10:07:09,056 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:07:09,057 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:07:09,057 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-12 10:07:09,057 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:07:09,058 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 10:07:09,061 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 4 proven. 55 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2020-10-12 10:07:09,062 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [985351248] [2020-10-12 10:07:09,062 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 10:07:09,062 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-12 10:07:09,062 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1245953408] [2020-10-12 10:07:09,063 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-12 10:07:09,063 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 10:07:09,063 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-12 10:07:09,064 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2020-10-12 10:07:09,064 INFO L87 Difference]: Start difference. First operand 44 states and 46 transitions. Second operand 14 states. [2020-10-12 10:07:09,183 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 10:07:09,183 INFO L93 Difference]: Finished difference Result 73 states and 77 transitions. [2020-10-12 10:07:09,184 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-12 10:07:09,184 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 41 [2020-10-12 10:07:09,184 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 10:07:09,185 INFO L225 Difference]: With dead ends: 73 [2020-10-12 10:07:09,185 INFO L226 Difference]: Without dead ends: 46 [2020-10-12 10:07:09,186 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2020-10-12 10:07:09,186 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2020-10-12 10:07:09,192 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 45. [2020-10-12 10:07:09,192 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-10-12 10:07:09,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 47 transitions. [2020-10-12 10:07:09,193 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 47 transitions. Word has length 41 [2020-10-12 10:07:09,193 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 10:07:09,193 INFO L479 AbstractCegarLoop]: Abstraction has 45 states and 47 transitions. [2020-10-12 10:07:09,193 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-12 10:07:09,193 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 47 transitions. [2020-10-12 10:07:09,194 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-10-12 10:07:09,194 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 10:07:09,194 INFO L422 BasicCegarLoop]: trace histogram [11, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 10:07:09,194 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-12 10:07:09,194 INFO L427 AbstractCegarLoop]: === Iteration 18 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 10:07:09,194 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 10:07:09,195 INFO L82 PathProgramCache]: Analyzing trace with hash 1697561098, now seen corresponding path program 14 times [2020-10-12 10:07:09,195 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 10:07:09,195 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [139994740] [2020-10-12 10:07:09,195 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 10:07:09,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:07:09,215 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:07:09,234 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:07:10,554 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:07:10,555 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 54 [2020-10-12 10:07:10,555 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 10:07:10,555 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1346 [2020-10-12 10:07:10,555 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:07:10,556 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-12 10:07:10,556 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 10:07:10,556 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 13 [2020-10-12 10:07:10,556 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:07:10,685 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 10:07:10,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:07:10,688 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:07:10,689 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:07:10,690 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 10:07:10,690 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:07:10,690 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 10:07:10,690 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:07:10,690 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:07:10,691 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:07:10,691 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:07:10,691 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:07:10,692 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2020-10-12 10:07:10,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:07:10,694 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:07:10,696 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:07:10,696 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:07:10,696 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:07:10,696 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 10:07:10,696 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:07:10,697 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:07:10,697 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-12 10:07:10,697 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:07:10,697 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:07:10,698 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2020-10-12 10:07:10,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:07:10,700 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:07:10,701 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:07:10,702 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:07:10,702 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:07:10,702 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 10:07:10,702 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:07:10,702 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:07:10,703 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-12 10:07:10,703 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:07:10,703 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:07:10,706 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 4 proven. 66 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2020-10-12 10:07:10,706 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [139994740] [2020-10-12 10:07:10,707 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 10:07:10,707 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-12 10:07:10,707 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [761224419] [2020-10-12 10:07:10,708 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-12 10:07:10,708 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 10:07:10,708 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-12 10:07:10,708 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210 [2020-10-12 10:07:10,709 INFO L87 Difference]: Start difference. First operand 45 states and 47 transitions. Second operand 15 states. [2020-10-12 10:07:10,847 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 10:07:10,847 INFO L93 Difference]: Finished difference Result 74 states and 78 transitions. [2020-10-12 10:07:10,847 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-12 10:07:10,847 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 42 [2020-10-12 10:07:10,848 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 10:07:10,848 INFO L225 Difference]: With dead ends: 74 [2020-10-12 10:07:10,848 INFO L226 Difference]: Without dead ends: 47 [2020-10-12 10:07:10,849 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210 [2020-10-12 10:07:10,850 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2020-10-12 10:07:10,855 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 46. [2020-10-12 10:07:10,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-10-12 10:07:10,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 48 transitions. [2020-10-12 10:07:10,856 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 48 transitions. Word has length 42 [2020-10-12 10:07:10,856 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 10:07:10,856 INFO L479 AbstractCegarLoop]: Abstraction has 46 states and 48 transitions. [2020-10-12 10:07:10,856 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-12 10:07:10,856 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 48 transitions. [2020-10-12 10:07:10,857 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-10-12 10:07:10,857 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 10:07:10,857 INFO L422 BasicCegarLoop]: trace histogram [12, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 10:07:10,857 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-12 10:07:10,857 INFO L427 AbstractCegarLoop]: === Iteration 19 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 10:07:10,858 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 10:07:10,858 INFO L82 PathProgramCache]: Analyzing trace with hash 888590182, now seen corresponding path program 15 times [2020-10-12 10:07:10,858 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 10:07:10,858 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1279231889] [2020-10-12 10:07:10,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 10:07:10,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:07:10,877 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:07:10,895 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:07:12,519 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:07:12,519 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 55 [2020-10-12 10:07:12,520 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 10:07:12,520 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1648 [2020-10-12 10:07:12,520 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:07:12,520 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-12 10:07:12,520 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 10:07:12,520 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-12 10:07:12,521 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:07:12,664 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 10:07:12,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:07:12,666 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:07:12,668 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:07:12,668 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 10:07:12,668 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:07:12,668 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 10:07:12,669 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:07:12,669 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:07:12,669 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:07:12,669 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:07:12,669 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:07:12,671 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2020-10-12 10:07:12,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:07:12,672 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:07:12,673 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:07:12,673 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:07:12,674 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:07:12,674 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 10:07:12,674 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:07:12,674 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:07:12,674 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-12 10:07:12,675 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:07:12,675 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:07:12,676 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2020-10-12 10:07:12,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:07:12,681 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:07:12,682 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:07:12,682 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:07:12,682 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:07:12,682 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 10:07:12,683 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:07:12,683 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:07:12,683 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-12 10:07:12,683 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:07:12,683 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:07:12,689 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 4 proven. 78 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2020-10-12 10:07:12,690 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1279231889] [2020-10-12 10:07:12,690 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 10:07:12,690 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-12 10:07:12,690 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1475061710] [2020-10-12 10:07:12,692 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-12 10:07:12,692 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 10:07:12,693 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-12 10:07:12,693 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=133, Unknown=0, NotChecked=0, Total=240 [2020-10-12 10:07:12,693 INFO L87 Difference]: Start difference. First operand 46 states and 48 transitions. Second operand 16 states. [2020-10-12 10:07:12,808 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 10:07:12,809 INFO L93 Difference]: Finished difference Result 75 states and 79 transitions. [2020-10-12 10:07:12,809 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-12 10:07:12,809 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 43 [2020-10-12 10:07:12,810 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 10:07:12,810 INFO L225 Difference]: With dead ends: 75 [2020-10-12 10:07:12,810 INFO L226 Difference]: Without dead ends: 48 [2020-10-12 10:07:12,811 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=107, Invalid=133, Unknown=0, NotChecked=0, Total=240 [2020-10-12 10:07:12,812 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2020-10-12 10:07:12,817 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 47. [2020-10-12 10:07:12,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2020-10-12 10:07:12,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 49 transitions. [2020-10-12 10:07:12,818 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 49 transitions. Word has length 43 [2020-10-12 10:07:12,818 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 10:07:12,818 INFO L479 AbstractCegarLoop]: Abstraction has 47 states and 49 transitions. [2020-10-12 10:07:12,819 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-12 10:07:12,819 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 49 transitions. [2020-10-12 10:07:12,819 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2020-10-12 10:07:12,819 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 10:07:12,819 INFO L422 BasicCegarLoop]: trace histogram [13, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 10:07:12,820 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-12 10:07:12,820 INFO L427 AbstractCegarLoop]: === Iteration 20 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 10:07:12,820 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 10:07:12,820 INFO L82 PathProgramCache]: Analyzing trace with hash 1580295562, now seen corresponding path program 16 times [2020-10-12 10:07:12,820 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 10:07:12,821 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1994172348] [2020-10-12 10:07:12,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 10:07:12,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:07:12,841 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:07:12,858 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:07:14,509 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:07:14,510 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 56 [2020-10-12 10:07:14,510 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 10:07:14,510 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1675 [2020-10-12 10:07:14,511 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:07:14,511 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-12 10:07:14,511 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 10:07:14,511 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 15 [2020-10-12 10:07:14,512 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:07:14,670 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 10:07:14,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:07:14,672 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:07:14,674 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:07:14,674 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 10:07:14,674 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:07:14,675 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 10:07:14,675 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:07:14,675 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:07:14,675 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:07:14,675 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:07:14,676 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:07:14,677 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2020-10-12 10:07:14,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:07:14,680 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:07:14,681 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:07:14,681 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:07:14,681 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:07:14,681 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 10:07:14,681 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:07:14,682 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:07:14,682 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-12 10:07:14,682 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:07:14,682 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:07:14,683 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2020-10-12 10:07:14,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:07:14,685 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:07:14,686 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:07:14,686 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:07:14,686 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:07:14,686 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 10:07:14,686 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:07:14,686 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:07:14,687 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-12 10:07:14,687 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:07:14,687 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:07:14,690 INFO L134 CoverageAnalysis]: Checked inductivity of 109 backedges. 4 proven. 91 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2020-10-12 10:07:14,690 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1994172348] [2020-10-12 10:07:14,691 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 10:07:14,692 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-12 10:07:14,692 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [398009429] [2020-10-12 10:07:14,692 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-12 10:07:14,693 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 10:07:14,693 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-12 10:07:14,693 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=150, Unknown=0, NotChecked=0, Total=272 [2020-10-12 10:07:14,693 INFO L87 Difference]: Start difference. First operand 47 states and 49 transitions. Second operand 17 states. [2020-10-12 10:07:14,792 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 10:07:14,792 INFO L93 Difference]: Finished difference Result 76 states and 80 transitions. [2020-10-12 10:07:14,792 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-12 10:07:14,793 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 44 [2020-10-12 10:07:14,793 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 10:07:14,793 INFO L225 Difference]: With dead ends: 76 [2020-10-12 10:07:14,794 INFO L226 Difference]: Without dead ends: 49 [2020-10-12 10:07:14,794 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=122, Invalid=150, Unknown=0, NotChecked=0, Total=272 [2020-10-12 10:07:14,795 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2020-10-12 10:07:14,801 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 48. [2020-10-12 10:07:14,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-10-12 10:07:14,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 50 transitions. [2020-10-12 10:07:14,802 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 50 transitions. Word has length 44 [2020-10-12 10:07:14,803 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 10:07:14,803 INFO L479 AbstractCegarLoop]: Abstraction has 48 states and 50 transitions. [2020-10-12 10:07:14,803 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-12 10:07:14,803 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 50 transitions. [2020-10-12 10:07:14,803 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-10-12 10:07:14,804 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 10:07:14,804 INFO L422 BasicCegarLoop]: trace histogram [14, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 10:07:14,804 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-10-12 10:07:14,804 INFO L427 AbstractCegarLoop]: === Iteration 21 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 10:07:14,804 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 10:07:14,805 INFO L82 PathProgramCache]: Analyzing trace with hash 1548325862, now seen corresponding path program 17 times [2020-10-12 10:07:14,805 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 10:07:14,805 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [8140645] [2020-10-12 10:07:14,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 10:07:14,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:07:14,827 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:07:14,923 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:07:16,715 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:07:16,715 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 57 [2020-10-12 10:07:16,715 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 10:07:16,716 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1896 [2020-10-12 10:07:16,716 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:07:16,716 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-12 10:07:16,716 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 10:07:16,716 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-12 10:07:16,717 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:07:16,891 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 10:07:16,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:07:16,893 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:07:16,896 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:07:16,896 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 10:07:16,896 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:07:16,897 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-12 10:07:16,897 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:07:16,897 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:07:16,897 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:07:16,897 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:07:16,898 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:07:16,899 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2020-10-12 10:07:16,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:07:16,901 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:07:16,902 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:07:16,902 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:07:16,902 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:07:16,902 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 10:07:16,903 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:07:16,903 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:07:16,903 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-12 10:07:16,903 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:07:16,903 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:07:16,905 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2020-10-12 10:07:16,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:07:16,906 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:07:16,907 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:07:16,907 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:07:16,907 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:07:16,907 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 10:07:16,908 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:07:16,908 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:07:16,908 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-12 10:07:16,908 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:07:16,908 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:07:16,912 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 4 proven. 105 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2020-10-12 10:07:16,912 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [8140645] [2020-10-12 10:07:16,912 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 10:07:16,913 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-12 10:07:16,913 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1157936009] [2020-10-12 10:07:16,914 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-12 10:07:16,914 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 10:07:16,914 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-12 10:07:16,915 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2020-10-12 10:07:16,915 INFO L87 Difference]: Start difference. First operand 48 states and 50 transitions. Second operand 18 states. [2020-10-12 10:07:17,077 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 10:07:17,078 INFO L93 Difference]: Finished difference Result 77 states and 81 transitions. [2020-10-12 10:07:17,078 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-12 10:07:17,078 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 45 [2020-10-12 10:07:17,079 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 10:07:17,079 INFO L225 Difference]: With dead ends: 77 [2020-10-12 10:07:17,080 INFO L226 Difference]: Without dead ends: 50 [2020-10-12 10:07:17,080 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2020-10-12 10:07:17,081 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2020-10-12 10:07:17,096 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 49. [2020-10-12 10:07:17,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2020-10-12 10:07:17,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 51 transitions. [2020-10-12 10:07:17,099 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 51 transitions. Word has length 45 [2020-10-12 10:07:17,099 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 10:07:17,099 INFO L479 AbstractCegarLoop]: Abstraction has 49 states and 51 transitions. [2020-10-12 10:07:17,100 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-12 10:07:17,100 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 51 transitions. [2020-10-12 10:07:17,100 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-10-12 10:07:17,100 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 10:07:17,100 INFO L422 BasicCegarLoop]: trace histogram [15, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 10:07:17,101 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-10-12 10:07:17,101 INFO L427 AbstractCegarLoop]: === Iteration 22 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 10:07:17,103 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 10:07:17,103 INFO L82 PathProgramCache]: Analyzing trace with hash 557265162, now seen corresponding path program 18 times [2020-10-12 10:07:17,103 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 10:07:17,104 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1065439846] [2020-10-12 10:07:17,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 10:07:17,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:07:17,128 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:07:17,146 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:07:18,670 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:07:18,670 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 58 [2020-10-12 10:07:18,670 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 10:07:18,670 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1549 [2020-10-12 10:07:18,670 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:07:18,671 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-12 10:07:18,671 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 10:07:18,671 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-10-12 10:07:18,671 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:07:18,868 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 10:07:18,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:07:18,870 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:07:18,871 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:07:18,871 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 10:07:18,871 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:07:18,871 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 10:07:18,872 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:07:18,872 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:07:18,872 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:07:18,872 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:07:18,872 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:07:18,873 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2020-10-12 10:07:18,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:07:18,874 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:07:18,875 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:07:18,875 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:07:18,875 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:07:18,875 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 10:07:18,875 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:07:18,875 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:07:18,875 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-12 10:07:18,876 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:07:18,876 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:07:18,876 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2020-10-12 10:07:18,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:07:18,885 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:07:18,888 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:07:18,889 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:07:18,889 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:07:18,889 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-12 10:07:18,889 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:07:18,889 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:07:18,889 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-12 10:07:18,890 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:07:18,890 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:07:18,893 INFO L134 CoverageAnalysis]: Checked inductivity of 138 backedges. 4 proven. 120 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2020-10-12 10:07:18,893 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1065439846] [2020-10-12 10:07:18,893 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 10:07:18,893 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-10-12 10:07:18,894 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1666834310] [2020-10-12 10:07:18,894 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-12 10:07:18,894 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 10:07:18,894 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-12 10:07:18,895 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=187, Unknown=0, NotChecked=0, Total=342 [2020-10-12 10:07:18,895 INFO L87 Difference]: Start difference. First operand 49 states and 51 transitions. Second operand 19 states. [2020-10-12 10:07:19,070 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 10:07:19,071 INFO L93 Difference]: Finished difference Result 82 states and 88 transitions. [2020-10-12 10:07:19,073 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-12 10:07:19,073 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 46 [2020-10-12 10:07:19,074 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 10:07:19,074 INFO L225 Difference]: With dead ends: 82 [2020-10-12 10:07:19,075 INFO L226 Difference]: Without dead ends: 55 [2020-10-12 10:07:19,076 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=155, Invalid=187, Unknown=0, NotChecked=0, Total=342 [2020-10-12 10:07:19,076 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2020-10-12 10:07:19,082 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 51. [2020-10-12 10:07:19,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-10-12 10:07:19,083 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 53 transitions. [2020-10-12 10:07:19,083 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 53 transitions. Word has length 46 [2020-10-12 10:07:19,084 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 10:07:19,084 INFO L479 AbstractCegarLoop]: Abstraction has 51 states and 53 transitions. [2020-10-12 10:07:19,084 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-12 10:07:19,084 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 53 transitions. [2020-10-12 10:07:19,084 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-10-12 10:07:19,084 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 10:07:19,085 INFO L422 BasicCegarLoop]: trace histogram [16, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 10:07:19,085 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-10-12 10:07:19,085 INFO L427 AbstractCegarLoop]: === Iteration 23 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 10:07:19,085 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 10:07:19,085 INFO L82 PathProgramCache]: Analyzing trace with hash 729106985, now seen corresponding path program 19 times [2020-10-12 10:07:19,086 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 10:07:19,086 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [957863948] [2020-10-12 10:07:19,086 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 10:07:19,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:07:19,105 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:07:19,188 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:07:20,161 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:07:23,097 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:07:23,097 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 60 [2020-10-12 10:07:23,098 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-12 10:07:23,098 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3999 [2020-10-12 10:07:23,098 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:07:23,098 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-12 10:07:23,098 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 10:07:23,098 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-12 10:07:23,099 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:07:23,310 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 10:07:23,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:07:23,313 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:07:23,314 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:07:23,314 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 10:07:23,315 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:07:23,315 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 10:07:23,315 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:07:23,315 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:07:23,315 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:07:23,315 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:07:23,315 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:07:23,316 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2020-10-12 10:07:23,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:07:23,317 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:07:23,318 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:07:23,318 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:07:23,318 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:07:23,318 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 10:07:23,318 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:07:23,318 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:07:23,319 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-12 10:07:23,319 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:07:23,319 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:07:23,320 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-10-12 10:07:23,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:07:23,321 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:07:23,322 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:07:23,322 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:07:23,322 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:07:23,322 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 10:07:23,322 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:07:23,323 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:07:23,323 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-12 10:07:23,323 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:07:23,323 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:07:23,326 INFO L134 CoverageAnalysis]: Checked inductivity of 157 backedges. 4 proven. 136 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2020-10-12 10:07:23,326 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [957863948] [2020-10-12 10:07:23,327 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 10:07:23,327 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-10-12 10:07:23,327 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2048707286] [2020-10-12 10:07:23,328 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-12 10:07:23,328 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 10:07:23,328 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-12 10:07:23,329 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=207, Unknown=0, NotChecked=0, Total=380 [2020-10-12 10:07:23,329 INFO L87 Difference]: Start difference. First operand 51 states and 53 transitions. Second operand 20 states. [2020-10-12 10:07:23,458 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 10:07:23,459 INFO L93 Difference]: Finished difference Result 84 states and 89 transitions. [2020-10-12 10:07:23,461 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-12 10:07:23,461 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 48 [2020-10-12 10:07:23,462 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 10:07:23,463 INFO L225 Difference]: With dead ends: 84 [2020-10-12 10:07:23,463 INFO L226 Difference]: Without dead ends: 56 [2020-10-12 10:07:23,464 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=173, Invalid=207, Unknown=0, NotChecked=0, Total=380 [2020-10-12 10:07:23,464 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2020-10-12 10:07:23,471 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 52. [2020-10-12 10:07:23,471 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-10-12 10:07:23,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 54 transitions. [2020-10-12 10:07:23,472 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 54 transitions. Word has length 48 [2020-10-12 10:07:23,472 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 10:07:23,472 INFO L479 AbstractCegarLoop]: Abstraction has 52 states and 54 transitions. [2020-10-12 10:07:23,472 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-12 10:07:23,472 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 54 transitions. [2020-10-12 10:07:23,473 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2020-10-12 10:07:23,473 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 10:07:23,473 INFO L422 BasicCegarLoop]: trace histogram [17, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 10:07:23,473 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-10-12 10:07:23,473 INFO L427 AbstractCegarLoop]: === Iteration 24 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 10:07:23,474 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 10:07:23,474 INFO L82 PathProgramCache]: Analyzing trace with hash -355014011, now seen corresponding path program 20 times [2020-10-12 10:07:23,474 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 10:07:23,474 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1705744938] [2020-10-12 10:07:23,474 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 10:07:23,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:07:23,492 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:07:23,507 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:07:24,478 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:07:27,299 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:07:27,299 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 61 [2020-10-12 10:07:27,299 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-12 10:07:27,299 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3813 [2020-10-12 10:07:27,299 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:07:27,299 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 19 [2020-10-12 10:07:27,299 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 10:07:27,300 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 19 [2020-10-12 10:07:27,300 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:07:27,563 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 10:07:27,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:07:27,565 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:07:27,568 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:07:27,568 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 10:07:27,568 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:07:27,569 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 10:07:27,569 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:07:27,569 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:07:27,570 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:07:27,570 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:07:27,570 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 10:07:27,572 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2020-10-12 10:07:27,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:07:27,573 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:07:27,574 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:07:27,575 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:07:27,575 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:07:27,575 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 10:07:27,576 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:07:27,576 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:07:27,576 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-12 10:07:27,577 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:07:27,577 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 10:07:27,578 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2020-10-12 10:07:27,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:07:27,580 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:07:27,581 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:07:27,581 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:07:27,582 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:07:27,582 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 10:07:27,582 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:07:27,583 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:07:27,583 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-12 10:07:27,583 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:07:27,583 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 10:07:27,589 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 4 proven. 153 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2020-10-12 10:07:27,590 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1705744938] [2020-10-12 10:07:27,591 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 10:07:27,591 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-10-12 10:07:27,595 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1030477106] [2020-10-12 10:07:27,596 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-12 10:07:27,599 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 10:07:27,601 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-12 10:07:27,601 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=192, Invalid=228, Unknown=0, NotChecked=0, Total=420 [2020-10-12 10:07:27,602 INFO L87 Difference]: Start difference. First operand 52 states and 54 transitions. Second operand 21 states. [2020-10-12 10:07:27,827 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 10:07:27,827 INFO L93 Difference]: Finished difference Result 85 states and 90 transitions. [2020-10-12 10:07:27,828 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-12 10:07:27,828 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 49 [2020-10-12 10:07:27,828 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 10:07:27,829 INFO L225 Difference]: With dead ends: 85 [2020-10-12 10:07:27,829 INFO L226 Difference]: Without dead ends: 57 [2020-10-12 10:07:27,830 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=192, Invalid=228, Unknown=0, NotChecked=0, Total=420 [2020-10-12 10:07:27,830 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2020-10-12 10:07:27,837 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 53. [2020-10-12 10:07:27,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2020-10-12 10:07:27,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 55 transitions. [2020-10-12 10:07:27,839 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 55 transitions. Word has length 49 [2020-10-12 10:07:27,839 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 10:07:27,839 INFO L479 AbstractCegarLoop]: Abstraction has 53 states and 55 transitions. [2020-10-12 10:07:27,839 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-12 10:07:27,839 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 55 transitions. [2020-10-12 10:07:27,843 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2020-10-12 10:07:27,844 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 10:07:27,844 INFO L422 BasicCegarLoop]: trace histogram [18, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 10:07:27,846 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-10-12 10:07:27,848 INFO L427 AbstractCegarLoop]: === Iteration 25 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 10:07:27,848 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 10:07:27,849 INFO L82 PathProgramCache]: Analyzing trace with hash 396973481, now seen corresponding path program 21 times [2020-10-12 10:07:27,849 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 10:07:27,849 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [191660367] [2020-10-12 10:07:27,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 10:07:27,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:07:27,868 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:07:27,990 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:07:28,891 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:07:31,101 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:07:31,101 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 62 [2020-10-12 10:07:31,101 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-12 10:07:31,101 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3240 [2020-10-12 10:07:31,102 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:07:31,102 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-10-12 10:07:31,102 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 10:07:31,102 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-12 10:07:31,102 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:07:31,357 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 10:07:31,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:07:31,358 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:07:31,361 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:07:31,362 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 10:07:31,362 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:07:31,362 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-12 10:07:31,362 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:07:31,363 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:07:31,364 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:07:31,364 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:07:31,364 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 10:07:31,365 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2020-10-12 10:07:31,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:07:31,366 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:07:31,369 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:07:31,370 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:07:31,370 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:07:31,370 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-12 10:07:31,370 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:07:31,370 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:07:31,371 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-12 10:07:31,371 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:07:31,371 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:07:31,372 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2020-10-12 10:07:31,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:07:31,374 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:07:31,375 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:07:31,375 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:07:31,375 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:07:31,376 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 10:07:31,376 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:07:31,376 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:07:31,377 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-12 10:07:31,377 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:07:31,377 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 10:07:31,384 INFO L134 CoverageAnalysis]: Checked inductivity of 192 backedges. 4 proven. 171 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2020-10-12 10:07:31,384 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [191660367] [2020-10-12 10:07:31,384 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 10:07:31,385 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-10-12 10:07:31,385 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [905857903] [2020-10-12 10:07:31,385 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-12 10:07:31,386 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 10:07:31,386 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-12 10:07:31,386 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=212, Invalid=250, Unknown=0, NotChecked=0, Total=462 [2020-10-12 10:07:31,387 INFO L87 Difference]: Start difference. First operand 53 states and 55 transitions. Second operand 22 states. [2020-10-12 10:07:31,538 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 10:07:31,538 INFO L93 Difference]: Finished difference Result 86 states and 91 transitions. [2020-10-12 10:07:31,539 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-12 10:07:31,539 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 50 [2020-10-12 10:07:31,539 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 10:07:31,540 INFO L225 Difference]: With dead ends: 86 [2020-10-12 10:07:31,540 INFO L226 Difference]: Without dead ends: 58 [2020-10-12 10:07:31,541 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=212, Invalid=250, Unknown=0, NotChecked=0, Total=462 [2020-10-12 10:07:31,541 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2020-10-12 10:07:31,552 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 54. [2020-10-12 10:07:31,552 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-10-12 10:07:31,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 56 transitions. [2020-10-12 10:07:31,553 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 56 transitions. Word has length 50 [2020-10-12 10:07:31,553 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 10:07:31,554 INFO L479 AbstractCegarLoop]: Abstraction has 54 states and 56 transitions. [2020-10-12 10:07:31,554 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-12 10:07:31,554 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 56 transitions. [2020-10-12 10:07:31,557 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-10-12 10:07:31,557 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 10:07:31,557 INFO L422 BasicCegarLoop]: trace histogram [19, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 10:07:31,557 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-10-12 10:07:31,557 INFO L427 AbstractCegarLoop]: === Iteration 26 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 10:07:31,557 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 10:07:31,558 INFO L82 PathProgramCache]: Analyzing trace with hash -2061218043, now seen corresponding path program 22 times [2020-10-12 10:07:31,558 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 10:07:31,558 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [280406741] [2020-10-12 10:07:31,558 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 10:07:31,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:07:31,577 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:07:31,683 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:07:32,729 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:07:35,302 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:07:35,302 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 63 [2020-10-12 10:07:35,302 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-12 10:07:35,302 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3731 [2020-10-12 10:07:35,302 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:07:35,302 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 21 [2020-10-12 10:07:35,303 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 10:07:35,303 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 21 [2020-10-12 10:07:35,303 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:07:35,570 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 10:07:35,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:07:35,572 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:07:35,574 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:07:35,574 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 10:07:35,574 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:07:35,574 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 10:07:35,575 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:07:35,575 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:07:35,575 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:07:35,575 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:07:35,575 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:07:35,576 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2020-10-12 10:07:35,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:07:35,578 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:07:35,578 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:07:35,579 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:07:35,579 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:07:35,579 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 10:07:35,579 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:07:35,579 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:07:35,580 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-12 10:07:35,580 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:07:35,580 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:07:35,581 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2020-10-12 10:07:35,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:07:35,582 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:07:35,583 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:07:35,584 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:07:35,584 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:07:35,584 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 10:07:35,584 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:07:35,584 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:07:35,584 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-12 10:07:35,585 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:07:35,585 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:07:35,589 INFO L134 CoverageAnalysis]: Checked inductivity of 211 backedges. 4 proven. 190 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2020-10-12 10:07:35,589 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [280406741] [2020-10-12 10:07:35,589 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 10:07:35,590 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-10-12 10:07:35,590 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [77079602] [2020-10-12 10:07:35,590 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-12 10:07:35,590 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 10:07:35,591 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-12 10:07:35,591 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=233, Invalid=273, Unknown=0, NotChecked=0, Total=506 [2020-10-12 10:07:35,591 INFO L87 Difference]: Start difference. First operand 54 states and 56 transitions. Second operand 23 states. [2020-10-12 10:07:35,748 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 10:07:35,748 INFO L93 Difference]: Finished difference Result 87 states and 92 transitions. [2020-10-12 10:07:35,748 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-12 10:07:35,749 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 51 [2020-10-12 10:07:35,749 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 10:07:35,750 INFO L225 Difference]: With dead ends: 87 [2020-10-12 10:07:35,750 INFO L226 Difference]: Without dead ends: 59 [2020-10-12 10:07:35,751 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=233, Invalid=273, Unknown=0, NotChecked=0, Total=506 [2020-10-12 10:07:35,751 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2020-10-12 10:07:35,757 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 55. [2020-10-12 10:07:35,757 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2020-10-12 10:07:35,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 57 transitions. [2020-10-12 10:07:35,758 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 57 transitions. Word has length 51 [2020-10-12 10:07:35,758 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 10:07:35,758 INFO L479 AbstractCegarLoop]: Abstraction has 55 states and 57 transitions. [2020-10-12 10:07:35,758 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-12 10:07:35,758 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 57 transitions. [2020-10-12 10:07:35,759 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-10-12 10:07:35,759 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 10:07:35,759 INFO L422 BasicCegarLoop]: trace histogram [20, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 10:07:35,759 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-10-12 10:07:35,759 INFO L427 AbstractCegarLoop]: === Iteration 27 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 10:07:35,760 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 10:07:35,760 INFO L82 PathProgramCache]: Analyzing trace with hash -955743959, now seen corresponding path program 23 times [2020-10-12 10:07:35,760 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 10:07:35,760 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [858690436] [2020-10-12 10:07:35,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 10:07:35,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:07:35,785 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:07:35,805 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:07:37,407 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:07:40,231 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:07:40,232 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 64 [2020-10-12 10:07:40,232 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-12 10:07:40,232 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4457 [2020-10-12 10:07:40,232 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:07:40,232 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 22 [2020-10-12 10:07:40,232 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 10:07:40,233 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-12 10:07:40,233 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:07:40,540 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 10:07:40,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:07:40,542 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:07:40,543 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:07:40,543 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 10:07:40,543 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:07:40,543 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 10:07:40,544 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:07:40,544 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:07:40,544 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:07:40,544 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:07:40,544 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:07:40,546 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2020-10-12 10:07:40,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:07:40,550 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:07:40,551 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:07:40,551 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:07:40,551 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:07:40,552 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 10:07:40,552 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:07:40,552 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:07:40,553 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-12 10:07:40,553 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:07:40,553 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 10:07:40,555 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2020-10-12 10:07:40,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:07:40,556 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:07:40,557 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:07:40,558 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:07:40,558 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:07:40,558 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 10:07:40,558 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:07:40,558 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:07:40,558 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-12 10:07:40,559 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:07:40,559 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:07:40,564 INFO L134 CoverageAnalysis]: Checked inductivity of 231 backedges. 4 proven. 210 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2020-10-12 10:07:40,565 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [858690436] [2020-10-12 10:07:40,565 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 10:07:40,565 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2020-10-12 10:07:40,566 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1066535359] [2020-10-12 10:07:40,567 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-12 10:07:40,567 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 10:07:40,568 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-12 10:07:40,568 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=255, Invalid=297, Unknown=0, NotChecked=0, Total=552 [2020-10-12 10:07:40,569 INFO L87 Difference]: Start difference. First operand 55 states and 57 transitions. Second operand 24 states. [2020-10-12 10:07:40,777 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 10:07:40,777 INFO L93 Difference]: Finished difference Result 88 states and 93 transitions. [2020-10-12 10:07:40,778 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-12 10:07:40,778 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 52 [2020-10-12 10:07:40,778 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 10:07:40,779 INFO L225 Difference]: With dead ends: 88 [2020-10-12 10:07:40,779 INFO L226 Difference]: Without dead ends: 60 [2020-10-12 10:07:40,780 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=255, Invalid=297, Unknown=0, NotChecked=0, Total=552 [2020-10-12 10:07:40,781 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2020-10-12 10:07:40,791 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 56. [2020-10-12 10:07:40,792 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-10-12 10:07:40,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 58 transitions. [2020-10-12 10:07:40,792 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 58 transitions. Word has length 52 [2020-10-12 10:07:40,794 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 10:07:40,794 INFO L479 AbstractCegarLoop]: Abstraction has 56 states and 58 transitions. [2020-10-12 10:07:40,794 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-12 10:07:40,795 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 58 transitions. [2020-10-12 10:07:40,795 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-10-12 10:07:40,795 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 10:07:40,795 INFO L422 BasicCegarLoop]: trace histogram [21, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 10:07:40,796 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-10-12 10:07:40,796 INFO L427 AbstractCegarLoop]: === Iteration 28 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 10:07:40,796 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 10:07:40,796 INFO L82 PathProgramCache]: Analyzing trace with hash -1045785723, now seen corresponding path program 24 times [2020-10-12 10:07:40,796 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 10:07:40,796 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [617791394] [2020-10-12 10:07:40,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 10:07:40,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:07:40,825 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:07:40,847 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:07:42,715 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:07:45,204 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:07:45,204 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 65 [2020-10-12 10:07:45,204 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-12 10:07:45,204 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4389 [2020-10-12 10:07:45,204 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:07:45,204 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 23 [2020-10-12 10:07:45,205 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 10:07:45,205 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-10-12 10:07:45,205 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:07:45,512 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 10:07:45,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:07:45,514 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:07:45,515 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:07:45,515 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 10:07:45,515 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:07:45,515 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 10:07:45,515 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:07:45,515 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:07:45,515 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:07:45,516 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:07:45,516 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:07:45,516 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2020-10-12 10:07:45,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:07:45,518 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:07:45,518 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:07:45,518 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:07:45,519 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:07:45,519 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 10:07:45,519 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:07:45,519 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:07:45,519 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-12 10:07:45,519 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:07:45,520 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:07:45,521 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2020-10-12 10:07:45,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:07:45,522 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:07:45,522 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:07:45,522 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:07:45,523 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:07:45,523 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 10:07:45,523 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:07:45,523 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:07:45,523 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-12 10:07:45,523 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:07:45,523 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:07:45,526 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 4 proven. 231 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2020-10-12 10:07:45,526 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [617791394] [2020-10-12 10:07:45,526 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 10:07:45,526 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2020-10-12 10:07:45,526 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1561001470] [2020-10-12 10:07:45,527 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-12 10:07:45,527 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 10:07:45,527 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-12 10:07:45,528 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=278, Invalid=322, Unknown=0, NotChecked=0, Total=600 [2020-10-12 10:07:45,528 INFO L87 Difference]: Start difference. First operand 56 states and 58 transitions. Second operand 25 states. [2020-10-12 10:07:45,704 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 10:07:45,705 INFO L93 Difference]: Finished difference Result 89 states and 94 transitions. [2020-10-12 10:07:45,705 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-12 10:07:45,705 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 53 [2020-10-12 10:07:45,706 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 10:07:45,706 INFO L225 Difference]: With dead ends: 89 [2020-10-12 10:07:45,707 INFO L226 Difference]: Without dead ends: 61 [2020-10-12 10:07:45,708 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=278, Invalid=322, Unknown=0, NotChecked=0, Total=600 [2020-10-12 10:07:45,708 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2020-10-12 10:07:45,715 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 57. [2020-10-12 10:07:45,716 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-10-12 10:07:45,716 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 59 transitions. [2020-10-12 10:07:45,717 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 59 transitions. Word has length 53 [2020-10-12 10:07:45,717 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 10:07:45,717 INFO L479 AbstractCegarLoop]: Abstraction has 57 states and 59 transitions. [2020-10-12 10:07:45,717 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-12 10:07:45,717 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 59 transitions. [2020-10-12 10:07:45,718 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-10-12 10:07:45,718 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 10:07:45,718 INFO L422 BasicCegarLoop]: trace histogram [22, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 10:07:45,718 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2020-10-12 10:07:45,718 INFO L427 AbstractCegarLoop]: === Iteration 29 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 10:07:45,718 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 10:07:45,719 INFO L82 PathProgramCache]: Analyzing trace with hash 457886889, now seen corresponding path program 25 times [2020-10-12 10:07:45,719 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 10:07:45,719 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1877982325] [2020-10-12 10:07:45,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 10:07:45,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:07:45,745 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:07:45,761 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:07:47,682 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:07:50,664 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:07:50,664 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 66 [2020-10-12 10:07:50,664 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-12 10:07:50,665 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4929 [2020-10-12 10:07:50,665 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:07:50,665 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 24 [2020-10-12 10:07:50,665 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 10:07:50,665 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-10-12 10:07:50,665 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:07:50,975 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 10:07:50,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:07:50,977 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:07:50,978 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:07:50,978 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 10:07:50,978 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:07:50,978 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 10:07:50,978 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:07:50,978 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:07:50,978 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:07:50,979 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:07:50,979 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:07:50,980 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2020-10-12 10:07:50,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:07:50,980 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:07:50,981 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:07:50,981 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:07:50,981 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:07:50,981 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 10:07:50,981 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:07:50,982 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:07:50,982 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-12 10:07:50,982 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:07:50,982 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:07:50,983 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2020-10-12 10:07:50,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:07:50,984 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:07:50,984 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:07:50,985 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:07:50,985 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:07:50,985 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 10:07:50,985 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:07:50,985 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:07:50,986 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-12 10:07:50,986 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:07:50,986 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:07:50,990 INFO L134 CoverageAnalysis]: Checked inductivity of 274 backedges. 4 proven. 253 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2020-10-12 10:07:50,991 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1877982325] [2020-10-12 10:07:50,991 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 10:07:50,991 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2020-10-12 10:07:50,991 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1367354077] [2020-10-12 10:07:50,992 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-10-12 10:07:50,992 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 10:07:50,992 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-10-12 10:07:50,993 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=302, Invalid=348, Unknown=0, NotChecked=0, Total=650 [2020-10-12 10:07:50,993 INFO L87 Difference]: Start difference. First operand 57 states and 59 transitions. Second operand 26 states. [2020-10-12 10:07:51,251 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 10:07:51,251 INFO L93 Difference]: Finished difference Result 94 states and 101 transitions. [2020-10-12 10:07:51,253 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-12 10:07:51,254 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 54 [2020-10-12 10:07:51,254 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 10:07:51,254 INFO L225 Difference]: With dead ends: 94 [2020-10-12 10:07:51,254 INFO L226 Difference]: Without dead ends: 66 [2020-10-12 10:07:51,255 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=302, Invalid=348, Unknown=0, NotChecked=0, Total=650 [2020-10-12 10:07:51,255 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2020-10-12 10:07:51,262 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 59. [2020-10-12 10:07:51,262 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2020-10-12 10:07:51,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 61 transitions. [2020-10-12 10:07:51,263 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 61 transitions. Word has length 54 [2020-10-12 10:07:51,263 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 10:07:51,263 INFO L479 AbstractCegarLoop]: Abstraction has 59 states and 61 transitions. [2020-10-12 10:07:51,263 INFO L480 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-10-12 10:07:51,263 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 61 transitions. [2020-10-12 10:07:51,264 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-10-12 10:07:51,264 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 10:07:51,264 INFO L422 BasicCegarLoop]: trace histogram [23, 4, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 10:07:51,264 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2020-10-12 10:07:51,264 INFO L427 AbstractCegarLoop]: === Iteration 30 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 10:07:51,264 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 10:07:51,265 INFO L82 PathProgramCache]: Analyzing trace with hash -1504657814, now seen corresponding path program 26 times [2020-10-12 10:07:51,265 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 10:07:51,265 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [379460257] [2020-10-12 10:07:51,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 10:07:51,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:07:51,289 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:07:51,303 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:07:53,668 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:07:56,293 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:07:56,294 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 68 [2020-10-12 10:07:56,294 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-12 10:07:56,294 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5012 [2020-10-12 10:07:56,294 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:07:56,294 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 25 [2020-10-12 10:07:56,294 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 10:07:56,294 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 25 [2020-10-12 10:07:56,294 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:07:56,653 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 10:07:56,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:07:56,655 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:07:56,657 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:07:56,657 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 10:07:56,657 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:07:56,657 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 10:07:56,657 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:07:56,657 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:07:56,657 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:07:56,657 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:07:56,658 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:07:56,658 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2020-10-12 10:07:56,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:07:56,659 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:07:56,660 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:07:56,660 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:07:56,660 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:07:56,660 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 10:07:56,660 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:07:56,660 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:07:56,660 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-12 10:07:56,660 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:07:56,661 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:07:56,661 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2020-10-12 10:07:56,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:07:56,662 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:07:56,662 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:07:56,663 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:07:56,663 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:07:56,663 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 10:07:56,663 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:07:56,663 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:07:56,663 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-12 10:07:56,664 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:07:56,664 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:07:56,666 INFO L134 CoverageAnalysis]: Checked inductivity of 301 backedges. 4 proven. 276 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2020-10-12 10:07:56,666 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [379460257] [2020-10-12 10:07:56,667 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 10:07:56,667 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2020-10-12 10:07:56,667 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1023504487] [2020-10-12 10:07:56,667 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-10-12 10:07:56,668 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 10:07:56,668 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-10-12 10:07:56,668 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=327, Invalid=375, Unknown=0, NotChecked=0, Total=702 [2020-10-12 10:07:56,668 INFO L87 Difference]: Start difference. First operand 59 states and 61 transitions. Second operand 27 states. [2020-10-12 10:07:56,947 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 10:07:56,948 INFO L93 Difference]: Finished difference Result 96 states and 102 transitions. [2020-10-12 10:07:56,948 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-12 10:07:56,948 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 56 [2020-10-12 10:07:56,949 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 10:07:56,949 INFO L225 Difference]: With dead ends: 96 [2020-10-12 10:07:56,949 INFO L226 Difference]: Without dead ends: 67 [2020-10-12 10:07:56,952 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=327, Invalid=375, Unknown=0, NotChecked=0, Total=702 [2020-10-12 10:07:56,952 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2020-10-12 10:07:56,960 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 60. [2020-10-12 10:07:56,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2020-10-12 10:07:56,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 62 transitions. [2020-10-12 10:07:56,962 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 62 transitions. Word has length 56 [2020-10-12 10:07:56,962 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 10:07:56,962 INFO L479 AbstractCegarLoop]: Abstraction has 60 states and 62 transitions. [2020-10-12 10:07:56,962 INFO L480 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-10-12 10:07:56,962 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 62 transitions. [2020-10-12 10:07:56,963 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-10-12 10:07:56,963 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 10:07:56,963 INFO L422 BasicCegarLoop]: trace histogram [24, 4, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 10:07:56,963 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2020-10-12 10:07:56,963 INFO L427 AbstractCegarLoop]: === Iteration 31 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 10:07:56,964 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 10:07:56,964 INFO L82 PathProgramCache]: Analyzing trace with hash -2102771002, now seen corresponding path program 27 times [2020-10-12 10:07:56,964 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 10:07:56,964 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [34142089] [2020-10-12 10:07:56,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 10:07:56,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:07:57,000 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:07:57,029 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:07:59,584 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:08:02,005 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:08:02,005 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 69 [2020-10-12 10:08:02,005 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-12 10:08:02,005 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5022 [2020-10-12 10:08:02,005 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:08:02,006 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 26 [2020-10-12 10:08:02,006 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 10:08:02,006 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-12 10:08:02,006 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:08:02,407 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 10:08:02,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:08:02,408 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:08:02,409 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:08:02,410 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 10:08:02,410 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:08:02,410 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 10:08:02,410 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:08:02,410 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:08:02,410 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:08:02,411 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:08:02,411 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:08:02,411 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2020-10-12 10:08:02,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:08:02,412 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:08:02,413 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:08:02,413 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:08:02,413 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:08:02,413 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 10:08:02,413 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:08:02,413 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:08:02,414 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-12 10:08:02,414 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:08:02,414 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:08:02,414 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2020-10-12 10:08:02,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:08:02,416 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:08:02,416 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:08:02,416 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:08:02,416 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:08:02,416 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 10:08:02,417 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:08:02,417 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:08:02,417 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-12 10:08:02,417 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:08:02,417 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:08:02,420 INFO L134 CoverageAnalysis]: Checked inductivity of 325 backedges. 4 proven. 300 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2020-10-12 10:08:02,420 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [34142089] [2020-10-12 10:08:02,420 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 10:08:02,420 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2020-10-12 10:08:02,420 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [133978007] [2020-10-12 10:08:02,421 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-10-12 10:08:02,421 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 10:08:02,421 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-10-12 10:08:02,421 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=353, Invalid=403, Unknown=0, NotChecked=0, Total=756 [2020-10-12 10:08:02,422 INFO L87 Difference]: Start difference. First operand 60 states and 62 transitions. Second operand 28 states. [2020-10-12 10:08:02,629 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 10:08:02,629 INFO L93 Difference]: Finished difference Result 97 states and 103 transitions. [2020-10-12 10:08:02,632 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-12 10:08:02,632 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 57 [2020-10-12 10:08:02,633 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 10:08:02,633 INFO L225 Difference]: With dead ends: 97 [2020-10-12 10:08:02,634 INFO L226 Difference]: Without dead ends: 68 [2020-10-12 10:08:02,634 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=353, Invalid=403, Unknown=0, NotChecked=0, Total=756 [2020-10-12 10:08:02,635 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2020-10-12 10:08:02,644 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 61. [2020-10-12 10:08:02,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2020-10-12 10:08:02,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 63 transitions. [2020-10-12 10:08:02,645 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 63 transitions. Word has length 57 [2020-10-12 10:08:02,646 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 10:08:02,646 INFO L479 AbstractCegarLoop]: Abstraction has 61 states and 63 transitions. [2020-10-12 10:08:02,646 INFO L480 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-10-12 10:08:02,646 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 63 transitions. [2020-10-12 10:08:02,647 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-10-12 10:08:02,647 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 10:08:02,647 INFO L422 BasicCegarLoop]: trace histogram [25, 4, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 10:08:02,647 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2020-10-12 10:08:02,647 INFO L427 AbstractCegarLoop]: === Iteration 32 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 10:08:02,648 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 10:08:02,648 INFO L82 PathProgramCache]: Analyzing trace with hash 830556650, now seen corresponding path program 28 times [2020-10-12 10:08:02,648 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 10:08:02,648 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [978360496] [2020-10-12 10:08:02,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 10:08:02,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:08:02,684 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:08:02,709 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:08:05,463 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:08:07,680 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:08:07,680 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 70 [2020-10-12 10:08:07,680 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-12 10:08:07,680 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5008 [2020-10-12 10:08:07,680 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:08:07,681 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 27 [2020-10-12 10:08:07,681 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 10:08:07,681 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 27 [2020-10-12 10:08:07,681 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:08:08,099 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 10:08:08,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:08:08,101 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:08:08,102 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:08:08,102 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 10:08:08,103 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:08:08,103 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 10:08:08,103 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:08:08,103 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:08:08,103 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:08:08,103 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:08:08,104 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:08:08,104 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2020-10-12 10:08:08,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:08:08,106 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:08:08,106 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:08:08,106 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:08:08,107 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:08:08,107 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 10:08:08,107 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:08:08,107 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:08:08,107 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-12 10:08:08,107 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:08:08,107 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:08:08,108 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2020-10-12 10:08:08,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:08:08,109 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:08:08,109 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:08:08,110 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:08:08,110 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:08:08,110 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 10:08:08,110 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:08:08,110 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:08:08,110 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-12 10:08:08,110 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:08:08,111 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:08:08,114 INFO L134 CoverageAnalysis]: Checked inductivity of 350 backedges. 4 proven. 325 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2020-10-12 10:08:08,114 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [978360496] [2020-10-12 10:08:08,114 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 10:08:08,115 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29] total 29 [2020-10-12 10:08:08,115 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [769950320] [2020-10-12 10:08:08,115 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-10-12 10:08:08,115 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 10:08:08,116 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-10-12 10:08:08,116 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=380, Invalid=432, Unknown=0, NotChecked=0, Total=812 [2020-10-12 10:08:08,116 INFO L87 Difference]: Start difference. First operand 61 states and 63 transitions. Second operand 29 states. [2020-10-12 10:08:08,375 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 10:08:08,375 INFO L93 Difference]: Finished difference Result 98 states and 104 transitions. [2020-10-12 10:08:08,375 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-12 10:08:08,375 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 58 [2020-10-12 10:08:08,376 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 10:08:08,376 INFO L225 Difference]: With dead ends: 98 [2020-10-12 10:08:08,377 INFO L226 Difference]: Without dead ends: 69 [2020-10-12 10:08:08,378 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=380, Invalid=432, Unknown=0, NotChecked=0, Total=812 [2020-10-12 10:08:08,378 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2020-10-12 10:08:08,384 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 62. [2020-10-12 10:08:08,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-10-12 10:08:08,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 64 transitions. [2020-10-12 10:08:08,385 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 64 transitions. Word has length 58 [2020-10-12 10:08:08,386 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 10:08:08,386 INFO L479 AbstractCegarLoop]: Abstraction has 62 states and 64 transitions. [2020-10-12 10:08:08,386 INFO L480 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-10-12 10:08:08,386 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 64 transitions. [2020-10-12 10:08:08,387 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2020-10-12 10:08:08,387 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 10:08:08,387 INFO L422 BasicCegarLoop]: trace histogram [26, 4, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 10:08:08,387 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2020-10-12 10:08:08,387 INFO L427 AbstractCegarLoop]: === Iteration 33 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 10:08:08,387 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 10:08:08,387 INFO L82 PathProgramCache]: Analyzing trace with hash 1569400646, now seen corresponding path program 29 times [2020-10-12 10:08:08,388 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 10:08:08,388 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1574989246] [2020-10-12 10:08:08,388 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 10:08:08,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:08:08,417 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:08:08,441 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:08:11,536 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:08:13,408 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:08:13,409 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 71 [2020-10-12 10:08:13,409 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-12 10:08:13,409 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-12 10:08:13,409 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:08:13,409 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 28 [2020-10-12 10:08:13,409 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 10:08:13,409 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-10-12 10:08:13,409 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:08:13,862 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 10:08:13,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:08:13,864 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:08:13,865 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:08:13,865 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 10:08:13,865 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:08:13,866 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 10:08:13,866 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:08:13,866 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:08:13,866 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:08:13,866 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:08:13,866 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:08:13,867 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2020-10-12 10:08:13,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:08:13,868 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:08:13,869 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:08:13,869 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:08:13,869 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:08:13,870 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 10:08:13,870 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:08:13,870 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:08:13,870 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-12 10:08:13,870 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:08:13,870 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:08:13,871 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2020-10-12 10:08:13,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:08:13,872 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:08:13,872 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:08:13,872 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:08:13,873 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:08:13,873 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 10:08:13,873 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:08:13,873 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:08:13,873 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-12 10:08:13,873 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:08:13,873 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:08:13,876 INFO L134 CoverageAnalysis]: Checked inductivity of 376 backedges. 4 proven. 351 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2020-10-12 10:08:13,876 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1574989246] [2020-10-12 10:08:13,876 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 10:08:13,876 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30] total 30 [2020-10-12 10:08:13,876 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [89677745] [2020-10-12 10:08:13,877 INFO L459 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-10-12 10:08:13,877 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 10:08:13,877 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-10-12 10:08:13,878 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=408, Invalid=462, Unknown=0, NotChecked=0, Total=870 [2020-10-12 10:08:13,878 INFO L87 Difference]: Start difference. First operand 62 states and 64 transitions. Second operand 30 states. [2020-10-12 10:08:14,172 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 10:08:14,172 INFO L93 Difference]: Finished difference Result 99 states and 105 transitions. [2020-10-12 10:08:14,173 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-10-12 10:08:14,173 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 59 [2020-10-12 10:08:14,173 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 10:08:14,174 INFO L225 Difference]: With dead ends: 99 [2020-10-12 10:08:14,174 INFO L226 Difference]: Without dead ends: 70 [2020-10-12 10:08:14,175 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=408, Invalid=462, Unknown=0, NotChecked=0, Total=870 [2020-10-12 10:08:14,176 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2020-10-12 10:08:14,181 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 63. [2020-10-12 10:08:14,182 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2020-10-12 10:08:14,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 65 transitions. [2020-10-12 10:08:14,182 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 65 transitions. Word has length 59 [2020-10-12 10:08:14,183 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 10:08:14,183 INFO L479 AbstractCegarLoop]: Abstraction has 63 states and 65 transitions. [2020-10-12 10:08:14,183 INFO L480 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-10-12 10:08:14,183 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 65 transitions. [2020-10-12 10:08:14,183 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2020-10-12 10:08:14,183 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 10:08:14,184 INFO L422 BasicCegarLoop]: trace histogram [27, 4, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 10:08:14,184 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2020-10-12 10:08:14,184 INFO L427 AbstractCegarLoop]: === Iteration 34 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 10:08:14,184 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 10:08:14,184 INFO L82 PathProgramCache]: Analyzing trace with hash -1296239254, now seen corresponding path program 30 times [2020-10-12 10:08:14,185 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 10:08:14,185 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1869176622] [2020-10-12 10:08:14,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 10:08:14,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:08:14,208 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:08:14,224 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:08:17,086 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:08:19,207 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:08:19,207 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 72 [2020-10-12 10:08:19,208 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-12 10:08:19,208 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5007 [2020-10-12 10:08:19,208 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:08:19,208 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 29 [2020-10-12 10:08:19,208 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 10:08:19,208 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 29 [2020-10-12 10:08:19,208 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:08:19,673 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 10:08:19,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:08:19,674 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:08:19,675 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:08:19,675 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 10:08:19,676 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:08:19,676 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 10:08:19,676 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:08:19,676 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:08:19,676 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:08:19,676 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:08:19,676 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:08:19,677 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2020-10-12 10:08:19,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:08:19,678 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:08:19,678 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:08:19,678 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:08:19,679 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:08:19,679 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 10:08:19,679 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:08:19,679 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:08:19,679 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-12 10:08:19,679 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:08:19,679 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:08:19,680 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2020-10-12 10:08:19,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:08:19,680 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:08:19,681 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:08:19,681 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:08:19,681 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:08:19,681 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 10:08:19,681 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:08:19,682 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:08:19,682 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-12 10:08:19,682 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:08:19,682 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:08:19,685 INFO L134 CoverageAnalysis]: Checked inductivity of 403 backedges. 4 proven. 378 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2020-10-12 10:08:19,686 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1869176622] [2020-10-12 10:08:19,686 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 10:08:19,686 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31] total 31 [2020-10-12 10:08:19,686 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [559945731] [2020-10-12 10:08:19,686 INFO L459 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-10-12 10:08:19,686 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 10:08:19,687 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-10-12 10:08:19,687 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=437, Invalid=493, Unknown=0, NotChecked=0, Total=930 [2020-10-12 10:08:19,687 INFO L87 Difference]: Start difference. First operand 63 states and 65 transitions. Second operand 31 states. [2020-10-12 10:08:19,972 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 10:08:19,972 INFO L93 Difference]: Finished difference Result 100 states and 106 transitions. [2020-10-12 10:08:19,973 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-12 10:08:19,973 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 60 [2020-10-12 10:08:19,973 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 10:08:19,974 INFO L225 Difference]: With dead ends: 100 [2020-10-12 10:08:19,974 INFO L226 Difference]: Without dead ends: 71 [2020-10-12 10:08:19,975 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=437, Invalid=493, Unknown=0, NotChecked=0, Total=930 [2020-10-12 10:08:19,975 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2020-10-12 10:08:19,982 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 64. [2020-10-12 10:08:19,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-10-12 10:08:19,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 66 transitions. [2020-10-12 10:08:19,983 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 66 transitions. Word has length 60 [2020-10-12 10:08:19,983 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 10:08:19,983 INFO L479 AbstractCegarLoop]: Abstraction has 64 states and 66 transitions. [2020-10-12 10:08:19,983 INFO L480 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-10-12 10:08:19,983 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 66 transitions. [2020-10-12 10:08:19,984 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-10-12 10:08:19,984 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 10:08:19,984 INFO L422 BasicCegarLoop]: trace histogram [28, 4, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 10:08:19,984 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2020-10-12 10:08:19,985 INFO L427 AbstractCegarLoop]: === Iteration 35 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 10:08:19,985 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 10:08:19,985 INFO L82 PathProgramCache]: Analyzing trace with hash 63237062, now seen corresponding path program 31 times [2020-10-12 10:08:19,985 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 10:08:19,985 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1467913696] [2020-10-12 10:08:19,986 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 10:08:19,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:08:20,007 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:08:20,028 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:08:23,158 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:08:25,012 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:08:25,012 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 73 [2020-10-12 10:08:25,012 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-12 10:08:25,012 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5013 [2020-10-12 10:08:25,012 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:08:25,012 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 30 [2020-10-12 10:08:25,012 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 10:08:25,013 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-12 10:08:25,013 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:08:25,505 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 10:08:25,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:08:25,507 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:08:25,508 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:08:25,509 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 10:08:25,509 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:08:25,509 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 10:08:25,509 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:08:25,510 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:08:25,510 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:08:25,510 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:08:25,510 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 10:08:25,511 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2020-10-12 10:08:25,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:08:25,513 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:08:25,513 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:08:25,514 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:08:25,514 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:08:25,514 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 10:08:25,514 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:08:25,515 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:08:25,515 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-12 10:08:25,515 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:08:25,515 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 10:08:25,517 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2020-10-12 10:08:25,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:08:25,529 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:08:25,532 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:08:25,533 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:08:25,533 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:08:25,533 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-12 10:08:25,533 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:08:25,533 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:08:25,533 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-12 10:08:25,534 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:08:25,534 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:08:25,539 INFO L134 CoverageAnalysis]: Checked inductivity of 431 backedges. 4 proven. 406 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2020-10-12 10:08:25,539 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1467913696] [2020-10-12 10:08:25,539 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 10:08:25,539 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32] total 32 [2020-10-12 10:08:25,540 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [269092277] [2020-10-12 10:08:25,540 INFO L459 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-10-12 10:08:25,540 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 10:08:25,541 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-10-12 10:08:25,541 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=467, Invalid=525, Unknown=0, NotChecked=0, Total=992 [2020-10-12 10:08:25,541 INFO L87 Difference]: Start difference. First operand 64 states and 66 transitions. Second operand 32 states. [2020-10-12 10:08:25,813 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 10:08:25,813 INFO L93 Difference]: Finished difference Result 101 states and 107 transitions. [2020-10-12 10:08:25,814 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-10-12 10:08:25,814 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 61 [2020-10-12 10:08:25,814 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 10:08:25,815 INFO L225 Difference]: With dead ends: 101 [2020-10-12 10:08:25,815 INFO L226 Difference]: Without dead ends: 72 [2020-10-12 10:08:25,815 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=467, Invalid=525, Unknown=0, NotChecked=0, Total=992 [2020-10-12 10:08:25,815 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2020-10-12 10:08:25,822 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 65. [2020-10-12 10:08:25,822 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2020-10-12 10:08:25,822 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 67 transitions. [2020-10-12 10:08:25,822 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 67 transitions. Word has length 61 [2020-10-12 10:08:25,823 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 10:08:25,823 INFO L479 AbstractCegarLoop]: Abstraction has 65 states and 67 transitions. [2020-10-12 10:08:25,823 INFO L480 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-10-12 10:08:25,823 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 67 transitions. [2020-10-12 10:08:25,823 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2020-10-12 10:08:25,824 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 10:08:25,824 INFO L422 BasicCegarLoop]: trace histogram [29, 4, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 10:08:25,824 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2020-10-12 10:08:25,824 INFO L427 AbstractCegarLoop]: === Iteration 36 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 10:08:25,824 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 10:08:25,824 INFO L82 PathProgramCache]: Analyzing trace with hash -742670102, now seen corresponding path program 32 times [2020-10-12 10:08:25,825 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 10:08:25,825 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1529018109] [2020-10-12 10:08:25,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 10:08:25,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:08:25,854 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:08:25,876 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:08:29,438 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:08:30,842 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:08:30,842 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 74 [2020-10-12 10:08:30,842 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-12 10:08:30,842 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4999 [2020-10-12 10:08:30,842 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:08:30,842 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 31 [2020-10-12 10:08:30,843 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 10:08:30,843 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 31 [2020-10-12 10:08:30,843 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:08:31,370 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 10:08:31,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:08:31,372 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:08:31,372 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:08:31,372 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 10:08:31,373 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:08:31,373 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 10:08:31,373 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:08:31,373 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:08:31,373 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:08:31,373 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:08:31,373 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:08:31,374 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2020-10-12 10:08:31,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:08:31,375 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:08:31,375 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:08:31,375 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:08:31,375 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:08:31,375 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 10:08:31,376 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:08:31,376 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:08:31,376 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-12 10:08:31,376 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:08:31,376 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:08:31,377 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2020-10-12 10:08:31,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:08:31,377 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:08:31,378 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:08:31,378 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:08:31,378 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:08:31,378 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 10:08:31,378 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:08:31,379 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:08:31,379 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-12 10:08:31,379 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:08:31,379 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:08:31,382 INFO L134 CoverageAnalysis]: Checked inductivity of 460 backedges. 4 proven. 435 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2020-10-12 10:08:31,383 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1529018109] [2020-10-12 10:08:31,383 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 10:08:31,383 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33] total 33 [2020-10-12 10:08:31,383 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1717153640] [2020-10-12 10:08:31,384 INFO L459 AbstractCegarLoop]: Interpolant automaton has 33 states [2020-10-12 10:08:31,384 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 10:08:31,384 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2020-10-12 10:08:31,384 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=498, Invalid=558, Unknown=0, NotChecked=0, Total=1056 [2020-10-12 10:08:31,385 INFO L87 Difference]: Start difference. First operand 65 states and 67 transitions. Second operand 33 states. [2020-10-12 10:08:31,699 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 10:08:31,699 INFO L93 Difference]: Finished difference Result 106 states and 114 transitions. [2020-10-12 10:08:31,699 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-10-12 10:08:31,700 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 62 [2020-10-12 10:08:31,700 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 10:08:31,701 INFO L225 Difference]: With dead ends: 106 [2020-10-12 10:08:31,701 INFO L226 Difference]: Without dead ends: 77 [2020-10-12 10:08:31,702 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=498, Invalid=558, Unknown=0, NotChecked=0, Total=1056 [2020-10-12 10:08:31,702 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2020-10-12 10:08:31,710 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 67. [2020-10-12 10:08:31,710 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2020-10-12 10:08:31,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 69 transitions. [2020-10-12 10:08:31,711 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 69 transitions. Word has length 62 [2020-10-12 10:08:31,711 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 10:08:31,712 INFO L479 AbstractCegarLoop]: Abstraction has 67 states and 69 transitions. [2020-10-12 10:08:31,712 INFO L480 AbstractCegarLoop]: Interpolant automaton has 33 states. [2020-10-12 10:08:31,712 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 69 transitions. [2020-10-12 10:08:31,712 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2020-10-12 10:08:31,712 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 10:08:31,713 INFO L422 BasicCegarLoop]: trace histogram [30, 5, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 10:08:31,713 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2020-10-12 10:08:31,713 INFO L427 AbstractCegarLoop]: === Iteration 37 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 10:08:31,713 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 10:08:31,713 INFO L82 PathProgramCache]: Analyzing trace with hash 924708425, now seen corresponding path program 33 times [2020-10-12 10:08:31,713 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 10:08:31,714 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2092881864] [2020-10-12 10:08:31,714 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 10:08:31,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:08:31,735 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:08:31,754 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:08:36,640 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:08:36,734 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:08:36,734 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 76 [2020-10-12 10:08:36,735 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-12 10:08:36,735 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5007 [2020-10-12 10:08:36,735 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:08:36,735 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 32 [2020-10-12 10:08:36,735 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 10:08:36,735 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-12 10:08:36,736 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:08:37,259 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 10:08:37,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:08:37,261 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:08:37,262 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:08:37,262 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 10:08:37,262 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:08:37,262 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 10:08:37,262 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:08:37,263 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:08:37,263 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:08:37,263 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:08:37,263 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:08:37,264 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2020-10-12 10:08:37,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:08:37,265 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:08:37,265 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:08:37,265 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:08:37,265 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:08:37,265 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 10:08:37,266 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:08:37,266 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:08:37,266 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-12 10:08:37,266 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:08:37,266 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:08:37,267 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2020-10-12 10:08:37,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:08:37,267 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:08:37,268 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:08:37,268 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:08:37,268 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:08:37,268 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 10:08:37,268 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:08:37,269 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:08:37,269 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-12 10:08:37,269 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:08:37,269 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:08:37,272 INFO L134 CoverageAnalysis]: Checked inductivity of 495 backedges. 4 proven. 465 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2020-10-12 10:08:37,272 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2092881864] [2020-10-12 10:08:37,272 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 10:08:37,273 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34] total 34 [2020-10-12 10:08:37,273 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [777108581] [2020-10-12 10:08:37,273 INFO L459 AbstractCegarLoop]: Interpolant automaton has 34 states [2020-10-12 10:08:37,273 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 10:08:37,274 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2020-10-12 10:08:37,274 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=530, Invalid=592, Unknown=0, NotChecked=0, Total=1122 [2020-10-12 10:08:37,274 INFO L87 Difference]: Start difference. First operand 67 states and 69 transitions. Second operand 34 states. [2020-10-12 10:08:37,615 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 10:08:37,615 INFO L93 Difference]: Finished difference Result 108 states and 115 transitions. [2020-10-12 10:08:37,616 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-10-12 10:08:37,617 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 64 [2020-10-12 10:08:37,617 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 10:08:37,618 INFO L225 Difference]: With dead ends: 108 [2020-10-12 10:08:37,618 INFO L226 Difference]: Without dead ends: 78 [2020-10-12 10:08:37,619 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=530, Invalid=592, Unknown=0, NotChecked=0, Total=1122 [2020-10-12 10:08:37,619 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2020-10-12 10:08:37,625 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 68. [2020-10-12 10:08:37,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2020-10-12 10:08:37,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 70 transitions. [2020-10-12 10:08:37,626 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 70 transitions. Word has length 64 [2020-10-12 10:08:37,626 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 10:08:37,627 INFO L479 AbstractCegarLoop]: Abstraction has 68 states and 70 transitions. [2020-10-12 10:08:37,627 INFO L480 AbstractCegarLoop]: Interpolant automaton has 34 states. [2020-10-12 10:08:37,627 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 70 transitions. [2020-10-12 10:08:37,627 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-10-12 10:08:37,627 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 10:08:37,628 INFO L422 BasicCegarLoop]: trace histogram [31, 5, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 10:08:37,628 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2020-10-12 10:08:37,628 INFO L427 AbstractCegarLoop]: === Iteration 38 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 10:08:37,628 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 10:08:37,628 INFO L82 PathProgramCache]: Analyzing trace with hash 1011570341, now seen corresponding path program 34 times [2020-10-12 10:08:37,629 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 10:08:37,629 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [678801800] [2020-10-12 10:08:37,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 10:08:37,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:08:37,661 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:08:37,690 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:08:42,655 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:08:42,656 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 77 [2020-10-12 10:08:42,656 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 10:08:42,656 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5008 [2020-10-12 10:08:42,656 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:08:42,656 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 33 [2020-10-12 10:08:42,656 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 10:08:42,656 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 33 [2020-10-12 10:08:42,657 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:08:43,215 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 10:08:43,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:08:43,217 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:08:43,218 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:08:43,218 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 10:08:43,218 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:08:43,218 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 10:08:43,218 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:08:43,219 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:08:43,219 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:08:43,219 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:08:43,219 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:08:43,220 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2020-10-12 10:08:43,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:08:43,221 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:08:43,222 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:08:43,222 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:08:43,222 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:08:43,222 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 10:08:43,223 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:08:43,223 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:08:43,223 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-12 10:08:43,223 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:08:43,223 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:08:43,224 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2020-10-12 10:08:43,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:08:43,225 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:08:43,226 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:08:43,226 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:08:43,226 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:08:43,226 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 10:08:43,227 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:08:43,227 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:08:43,227 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-12 10:08:43,227 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:08:43,227 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:08:43,230 INFO L134 CoverageAnalysis]: Checked inductivity of 526 backedges. 4 proven. 496 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2020-10-12 10:08:43,230 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [678801800] [2020-10-12 10:08:43,230 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 10:08:43,230 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35] total 35 [2020-10-12 10:08:43,230 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [821850730] [2020-10-12 10:08:43,231 INFO L459 AbstractCegarLoop]: Interpolant automaton has 35 states [2020-10-12 10:08:43,231 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 10:08:43,231 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2020-10-12 10:08:43,231 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=563, Invalid=627, Unknown=0, NotChecked=0, Total=1190 [2020-10-12 10:08:43,232 INFO L87 Difference]: Start difference. First operand 68 states and 70 transitions. Second operand 35 states. [2020-10-12 10:08:43,557 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 10:08:43,557 INFO L93 Difference]: Finished difference Result 109 states and 116 transitions. [2020-10-12 10:08:43,558 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-10-12 10:08:43,558 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 65 [2020-10-12 10:08:43,558 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 10:08:43,559 INFO L225 Difference]: With dead ends: 109 [2020-10-12 10:08:43,559 INFO L226 Difference]: Without dead ends: 79 [2020-10-12 10:08:43,560 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=563, Invalid=627, Unknown=0, NotChecked=0, Total=1190 [2020-10-12 10:08:43,561 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2020-10-12 10:08:43,570 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 69. [2020-10-12 10:08:43,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2020-10-12 10:08:43,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 71 transitions. [2020-10-12 10:08:43,571 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 71 transitions. Word has length 65 [2020-10-12 10:08:43,572 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 10:08:43,572 INFO L479 AbstractCegarLoop]: Abstraction has 69 states and 71 transitions. [2020-10-12 10:08:43,572 INFO L480 AbstractCegarLoop]: Interpolant automaton has 35 states. [2020-10-12 10:08:43,572 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 71 transitions. [2020-10-12 10:08:43,573 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-10-12 10:08:43,573 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 10:08:43,573 INFO L422 BasicCegarLoop]: trace histogram [32, 5, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 10:08:43,573 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2020-10-12 10:08:43,574 INFO L427 AbstractCegarLoop]: === Iteration 39 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 10:08:43,574 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 10:08:43,574 INFO L82 PathProgramCache]: Analyzing trace with hash -590677559, now seen corresponding path program 35 times [2020-10-12 10:08:43,574 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 10:08:43,574 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [880238566] [2020-10-12 10:08:43,575 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 10:08:43,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:08:43,608 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:08:43,641 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:08:48,595 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:08:48,595 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 78 [2020-10-12 10:08:48,595 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 10:08:48,595 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-12 10:08:48,596 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:08:48,596 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 34 [2020-10-12 10:08:48,596 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 10:08:48,596 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 34 [2020-10-12 10:08:48,596 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:08:49,197 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 10:08:49,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:08:49,199 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:08:49,200 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:08:49,200 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 10:08:49,200 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:08:49,200 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 10:08:49,200 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:08:49,200 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:08:49,201 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:08:49,201 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:08:49,201 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:08:49,201 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2020-10-12 10:08:49,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:08:49,202 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:08:49,203 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:08:49,203 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:08:49,203 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:08:49,203 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 10:08:49,203 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:08:49,203 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:08:49,203 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-12 10:08:49,204 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:08:49,204 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:08:49,204 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2020-10-12 10:08:49,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:08:49,205 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:08:49,205 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:08:49,206 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:08:49,206 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:08:49,206 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 10:08:49,206 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:08:49,206 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:08:49,206 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-12 10:08:49,206 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:08:49,206 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:08:49,209 INFO L134 CoverageAnalysis]: Checked inductivity of 558 backedges. 4 proven. 528 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2020-10-12 10:08:49,209 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [880238566] [2020-10-12 10:08:49,209 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 10:08:49,209 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36] total 36 [2020-10-12 10:08:49,210 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1836160929] [2020-10-12 10:08:49,210 INFO L459 AbstractCegarLoop]: Interpolant automaton has 36 states [2020-10-12 10:08:49,210 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 10:08:49,210 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2020-10-12 10:08:49,211 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=597, Invalid=663, Unknown=0, NotChecked=0, Total=1260 [2020-10-12 10:08:49,211 INFO L87 Difference]: Start difference. First operand 69 states and 71 transitions. Second operand 36 states. [2020-10-12 10:08:49,559 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 10:08:49,559 INFO L93 Difference]: Finished difference Result 110 states and 117 transitions. [2020-10-12 10:08:49,559 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-10-12 10:08:49,560 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 66 [2020-10-12 10:08:49,560 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 10:08:49,561 INFO L225 Difference]: With dead ends: 110 [2020-10-12 10:08:49,561 INFO L226 Difference]: Without dead ends: 80 [2020-10-12 10:08:49,562 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=597, Invalid=663, Unknown=0, NotChecked=0, Total=1260 [2020-10-12 10:08:49,563 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2020-10-12 10:08:49,593 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 70. [2020-10-12 10:08:49,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2020-10-12 10:08:49,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 72 transitions. [2020-10-12 10:08:49,594 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 72 transitions. Word has length 66 [2020-10-12 10:08:49,595 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 10:08:49,595 INFO L479 AbstractCegarLoop]: Abstraction has 70 states and 72 transitions. [2020-10-12 10:08:49,595 INFO L480 AbstractCegarLoop]: Interpolant automaton has 36 states. [2020-10-12 10:08:49,595 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 72 transitions. [2020-10-12 10:08:49,596 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-10-12 10:08:49,596 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 10:08:49,596 INFO L422 BasicCegarLoop]: trace histogram [33, 5, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 10:08:49,597 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2020-10-12 10:08:49,597 INFO L427 AbstractCegarLoop]: === Iteration 40 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 10:08:49,597 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 10:08:49,598 INFO L82 PathProgramCache]: Analyzing trace with hash 1279245093, now seen corresponding path program 36 times [2020-10-12 10:08:49,598 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 10:08:49,600 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1118216559] [2020-10-12 10:08:49,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 10:08:49,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:08:49,665 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:08:50,543 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:08:54,655 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:08:54,656 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 79 [2020-10-12 10:08:54,656 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 10:08:54,656 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5010 [2020-10-12 10:08:54,656 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:08:54,656 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 35 [2020-10-12 10:08:54,656 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 10:08:54,656 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 35 [2020-10-12 10:08:54,656 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:08:55,310 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 10:08:55,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:08:55,313 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:08:55,314 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:08:55,314 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 10:08:55,314 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:08:55,314 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 10:08:55,314 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:08:55,315 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:08:55,315 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:08:55,315 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:08:55,315 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:08:55,316 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2020-10-12 10:08:55,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:08:55,316 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:08:55,317 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:08:55,317 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:08:55,317 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:08:55,317 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 10:08:55,318 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:08:55,318 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:08:55,318 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-12 10:08:55,318 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:08:55,318 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:08:55,319 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2020-10-12 10:08:55,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:08:55,319 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:08:55,320 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:08:55,320 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:08:55,320 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:08:55,321 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 10:08:55,321 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:08:55,321 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:08:55,321 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-12 10:08:55,321 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:08:55,321 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:08:55,325 INFO L134 CoverageAnalysis]: Checked inductivity of 591 backedges. 4 proven. 561 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2020-10-12 10:08:55,325 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1118216559] [2020-10-12 10:08:55,325 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 10:08:55,325 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37] total 37 [2020-10-12 10:08:55,325 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1337456202] [2020-10-12 10:08:55,326 INFO L459 AbstractCegarLoop]: Interpolant automaton has 37 states [2020-10-12 10:08:55,326 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 10:08:55,326 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2020-10-12 10:08:55,327 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=632, Invalid=700, Unknown=0, NotChecked=0, Total=1332 [2020-10-12 10:08:55,327 INFO L87 Difference]: Start difference. First operand 70 states and 72 transitions. Second operand 37 states. [2020-10-12 10:08:55,618 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 10:08:55,618 INFO L93 Difference]: Finished difference Result 111 states and 118 transitions. [2020-10-12 10:08:55,619 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-10-12 10:08:55,619 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 67 [2020-10-12 10:08:55,619 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 10:08:55,621 INFO L225 Difference]: With dead ends: 111 [2020-10-12 10:08:55,621 INFO L226 Difference]: Without dead ends: 81 [2020-10-12 10:08:55,622 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=632, Invalid=700, Unknown=0, NotChecked=0, Total=1332 [2020-10-12 10:08:55,622 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2020-10-12 10:08:55,630 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 71. [2020-10-12 10:08:55,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2020-10-12 10:08:55,631 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 73 transitions. [2020-10-12 10:08:55,631 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 73 transitions. Word has length 67 [2020-10-12 10:08:55,631 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 10:08:55,631 INFO L479 AbstractCegarLoop]: Abstraction has 71 states and 73 transitions. [2020-10-12 10:08:55,631 INFO L480 AbstractCegarLoop]: Interpolant automaton has 37 states. [2020-10-12 10:08:55,632 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 73 transitions. [2020-10-12 10:08:55,632 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2020-10-12 10:08:55,632 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 10:08:55,633 INFO L422 BasicCegarLoop]: trace histogram [34, 5, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 10:08:55,633 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2020-10-12 10:08:55,633 INFO L427 AbstractCegarLoop]: === Iteration 41 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 10:08:55,633 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 10:08:55,633 INFO L82 PathProgramCache]: Analyzing trace with hash -882694839, now seen corresponding path program 37 times [2020-10-12 10:08:55,633 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 10:08:55,633 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2072510497] [2020-10-12 10:08:55,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 10:08:55,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:08:55,657 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:08:55,678 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:09:00,654 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:09:00,654 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 80 [2020-10-12 10:09:00,654 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 10:09:00,654 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5007 [2020-10-12 10:09:00,654 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:09:00,654 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 36 [2020-10-12 10:09:00,655 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 10:09:00,655 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 36 [2020-10-12 10:09:00,655 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:09:01,338 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 10:09:01,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:09:01,340 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:09:01,341 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:09:01,341 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 10:09:01,341 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:09:01,341 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 10:09:01,342 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:09:01,342 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:09:01,342 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:09:01,342 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:09:01,342 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:09:01,343 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2020-10-12 10:09:01,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:09:01,344 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:09:01,345 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:09:01,345 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:09:01,345 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:09:01,345 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 10:09:01,345 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:09:01,345 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:09:01,346 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-12 10:09:01,346 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:09:01,346 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:09:01,347 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2020-10-12 10:09:01,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:09:01,348 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:09:01,348 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:09:01,349 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:09:01,349 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:09:01,349 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 10:09:01,349 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:09:01,349 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:09:01,349 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-12 10:09:01,350 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:09:01,350 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:09:01,354 INFO L134 CoverageAnalysis]: Checked inductivity of 625 backedges. 4 proven. 595 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2020-10-12 10:09:01,355 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2072510497] [2020-10-12 10:09:01,355 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 10:09:01,355 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38] total 38 [2020-10-12 10:09:01,355 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [983023636] [2020-10-12 10:09:01,355 INFO L459 AbstractCegarLoop]: Interpolant automaton has 38 states [2020-10-12 10:09:01,356 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 10:09:01,356 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2020-10-12 10:09:01,356 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=668, Invalid=738, Unknown=0, NotChecked=0, Total=1406 [2020-10-12 10:09:01,357 INFO L87 Difference]: Start difference. First operand 71 states and 73 transitions. Second operand 38 states. [2020-10-12 10:09:01,569 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 10:09:01,569 INFO L93 Difference]: Finished difference Result 112 states and 119 transitions. [2020-10-12 10:09:01,570 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-10-12 10:09:01,570 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 68 [2020-10-12 10:09:01,570 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 10:09:01,571 INFO L225 Difference]: With dead ends: 112 [2020-10-12 10:09:01,571 INFO L226 Difference]: Without dead ends: 82 [2020-10-12 10:09:01,573 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=668, Invalid=738, Unknown=0, NotChecked=0, Total=1406 [2020-10-12 10:09:01,573 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2020-10-12 10:09:01,580 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 72. [2020-10-12 10:09:01,581 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2020-10-12 10:09:01,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 74 transitions. [2020-10-12 10:09:01,582 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 74 transitions. Word has length 68 [2020-10-12 10:09:01,582 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 10:09:01,582 INFO L479 AbstractCegarLoop]: Abstraction has 72 states and 74 transitions. [2020-10-12 10:09:01,582 INFO L480 AbstractCegarLoop]: Interpolant automaton has 38 states. [2020-10-12 10:09:01,582 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 74 transitions. [2020-10-12 10:09:01,583 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2020-10-12 10:09:01,583 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 10:09:01,583 INFO L422 BasicCegarLoop]: trace histogram [35, 5, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 10:09:01,583 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2020-10-12 10:09:01,583 INFO L427 AbstractCegarLoop]: === Iteration 42 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 10:09:01,584 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 10:09:01,584 INFO L82 PathProgramCache]: Analyzing trace with hash 816644005, now seen corresponding path program 38 times [2020-10-12 10:09:01,584 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 10:09:01,584 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [84837537] [2020-10-12 10:09:01,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 10:09:01,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:09:01,617 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:09:01,643 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:09:06,608 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:09:06,608 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 81 [2020-10-12 10:09:06,608 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 10:09:06,608 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-10-12 10:09:06,609 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:09:06,609 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 37 [2020-10-12 10:09:06,609 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 10:09:06,609 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 37 [2020-10-12 10:09:06,609 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:09:07,362 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 10:09:07,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:09:07,364 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:09:07,365 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:09:07,366 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 10:09:07,366 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:09:07,366 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 10:09:07,366 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:09:07,366 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:09:07,366 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:09:07,366 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:09:07,366 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:09:07,367 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2020-10-12 10:09:07,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:09:07,368 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:09:07,368 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:09:07,368 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:09:07,369 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:09:07,369 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 10:09:07,369 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:09:07,369 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:09:07,369 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-12 10:09:07,369 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:09:07,369 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:09:07,370 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2020-10-12 10:09:07,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:09:07,371 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:09:07,371 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:09:07,371 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:09:07,371 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:09:07,371 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 10:09:07,371 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:09:07,372 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:09:07,372 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-12 10:09:07,372 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:09:07,372 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:09:07,375 INFO L134 CoverageAnalysis]: Checked inductivity of 660 backedges. 4 proven. 630 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2020-10-12 10:09:07,376 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [84837537] [2020-10-12 10:09:07,376 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 10:09:07,376 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39] total 39 [2020-10-12 10:09:07,376 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1685512087] [2020-10-12 10:09:07,376 INFO L459 AbstractCegarLoop]: Interpolant automaton has 39 states [2020-10-12 10:09:07,376 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 10:09:07,377 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2020-10-12 10:09:07,377 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=705, Invalid=777, Unknown=0, NotChecked=0, Total=1482 [2020-10-12 10:09:07,377 INFO L87 Difference]: Start difference. First operand 72 states and 74 transitions. Second operand 39 states. [2020-10-12 10:09:07,743 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 10:09:07,744 INFO L93 Difference]: Finished difference Result 113 states and 120 transitions. [2020-10-12 10:09:07,744 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-10-12 10:09:07,744 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 69 [2020-10-12 10:09:07,744 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 10:09:07,745 INFO L225 Difference]: With dead ends: 113 [2020-10-12 10:09:07,745 INFO L226 Difference]: Without dead ends: 83 [2020-10-12 10:09:07,747 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=705, Invalid=777, Unknown=0, NotChecked=0, Total=1482 [2020-10-12 10:09:07,747 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2020-10-12 10:09:07,755 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 73. [2020-10-12 10:09:07,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2020-10-12 10:09:07,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 75 transitions. [2020-10-12 10:09:07,756 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 75 transitions. Word has length 69 [2020-10-12 10:09:07,756 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 10:09:07,757 INFO L479 AbstractCegarLoop]: Abstraction has 73 states and 75 transitions. [2020-10-12 10:09:07,757 INFO L480 AbstractCegarLoop]: Interpolant automaton has 39 states. [2020-10-12 10:09:07,757 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 75 transitions. [2020-10-12 10:09:07,757 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2020-10-12 10:09:07,757 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 10:09:07,758 INFO L422 BasicCegarLoop]: trace histogram [36, 5, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 10:09:07,758 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2020-10-12 10:09:07,758 INFO L427 AbstractCegarLoop]: === Iteration 43 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 10:09:07,758 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 10:09:07,758 INFO L82 PathProgramCache]: Analyzing trace with hash 1956540617, now seen corresponding path program 39 times [2020-10-12 10:09:07,759 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 10:09:07,759 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1581978066] [2020-10-12 10:09:07,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 10:09:07,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:09:07,789 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:09:07,810 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:09:12,796 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:09:12,797 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 82 [2020-10-12 10:09:12,797 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 10:09:12,797 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5017 [2020-10-12 10:09:12,797 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:09:12,797 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 38 [2020-10-12 10:09:12,797 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 10:09:12,797 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 38 [2020-10-12 10:09:12,798 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:09:13,560 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 10:09:13,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:09:13,561 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:09:13,563 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:09:13,563 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 10:09:13,563 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:09:13,563 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 10:09:13,563 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:09:13,563 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:09:13,564 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:09:13,564 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:09:13,564 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:09:13,564 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2020-10-12 10:09:13,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:09:13,565 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:09:13,566 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:09:13,566 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:09:13,566 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:09:13,566 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 10:09:13,566 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:09:13,566 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:09:13,566 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-12 10:09:13,567 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:09:13,567 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:09:13,567 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2020-10-12 10:09:13,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:09:13,568 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:09:13,568 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:09:13,569 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:09:13,569 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:09:13,569 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 10:09:13,569 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:09:13,569 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:09:13,569 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-12 10:09:13,569 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:09:13,569 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:09:13,575 INFO L134 CoverageAnalysis]: Checked inductivity of 696 backedges. 4 proven. 666 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2020-10-12 10:09:13,575 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1581978066] [2020-10-12 10:09:13,576 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 10:09:13,576 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40] total 40 [2020-10-12 10:09:13,576 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1075373180] [2020-10-12 10:09:13,576 INFO L459 AbstractCegarLoop]: Interpolant automaton has 40 states [2020-10-12 10:09:13,576 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 10:09:13,577 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2020-10-12 10:09:13,577 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=743, Invalid=817, Unknown=0, NotChecked=0, Total=1560 [2020-10-12 10:09:13,577 INFO L87 Difference]: Start difference. First operand 73 states and 75 transitions. Second operand 40 states. [2020-10-12 10:09:13,940 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 10:09:13,940 INFO L93 Difference]: Finished difference Result 118 states and 127 transitions. [2020-10-12 10:09:13,941 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-10-12 10:09:13,941 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 70 [2020-10-12 10:09:13,941 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 10:09:13,942 INFO L225 Difference]: With dead ends: 118 [2020-10-12 10:09:13,942 INFO L226 Difference]: Without dead ends: 88 [2020-10-12 10:09:13,943 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=743, Invalid=817, Unknown=0, NotChecked=0, Total=1560 [2020-10-12 10:09:13,943 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2020-10-12 10:09:13,951 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 75. [2020-10-12 10:09:13,951 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2020-10-12 10:09:13,952 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 77 transitions. [2020-10-12 10:09:13,952 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 77 transitions. Word has length 70 [2020-10-12 10:09:13,952 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 10:09:13,953 INFO L479 AbstractCegarLoop]: Abstraction has 75 states and 77 transitions. [2020-10-12 10:09:13,953 INFO L480 AbstractCegarLoop]: Interpolant automaton has 40 states. [2020-10-12 10:09:13,953 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 77 transitions. [2020-10-12 10:09:13,953 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2020-10-12 10:09:13,954 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 10:09:13,954 INFO L422 BasicCegarLoop]: trace histogram [37, 6, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 10:09:13,954 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2020-10-12 10:09:13,954 INFO L427 AbstractCegarLoop]: === Iteration 44 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 10:09:13,954 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 10:09:13,955 INFO L82 PathProgramCache]: Analyzing trace with hash 307549770, now seen corresponding path program 40 times [2020-10-12 10:09:13,955 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 10:09:13,955 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [849553883] [2020-10-12 10:09:13,955 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 10:09:13,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:09:13,985 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:09:14,009 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:09:18,980 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:09:18,980 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 84 [2020-10-12 10:09:18,980 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 10:09:18,980 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5007 [2020-10-12 10:09:18,980 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:09:18,980 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 39 [2020-10-12 10:09:18,980 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 10:09:18,981 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 39 [2020-10-12 10:09:18,981 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:09:19,817 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 10:09:19,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:09:19,818 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:09:19,820 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:09:19,821 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 10:09:19,821 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:09:19,821 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 10:09:19,821 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:09:19,821 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:09:19,821 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:09:19,822 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:09:19,822 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:09:19,823 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2020-10-12 10:09:19,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:09:19,824 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:09:19,825 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:09:19,825 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:09:19,825 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:09:19,826 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 10:09:19,826 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:09:19,826 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:09:19,826 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-12 10:09:19,826 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:09:19,826 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:09:19,828 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2020-10-12 10:09:19,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:09:19,829 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:09:19,829 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:09:19,830 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:09:19,830 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:09:19,830 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 10:09:19,830 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:09:19,830 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:09:19,831 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-12 10:09:19,831 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:09:19,831 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:09:19,838 INFO L134 CoverageAnalysis]: Checked inductivity of 739 backedges. 4 proven. 703 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2020-10-12 10:09:19,838 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [849553883] [2020-10-12 10:09:19,838 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 10:09:19,838 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41] total 41 [2020-10-12 10:09:19,839 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [315201392] [2020-10-12 10:09:19,839 INFO L459 AbstractCegarLoop]: Interpolant automaton has 41 states [2020-10-12 10:09:19,839 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 10:09:19,839 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2020-10-12 10:09:19,840 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=782, Invalid=858, Unknown=0, NotChecked=0, Total=1640 [2020-10-12 10:09:19,840 INFO L87 Difference]: Start difference. First operand 75 states and 77 transitions. Second operand 41 states. [2020-10-12 10:09:20,196 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 10:09:20,196 INFO L93 Difference]: Finished difference Result 120 states and 128 transitions. [2020-10-12 10:09:20,196 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2020-10-12 10:09:20,197 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 72 [2020-10-12 10:09:20,197 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 10:09:20,198 INFO L225 Difference]: With dead ends: 120 [2020-10-12 10:09:20,198 INFO L226 Difference]: Without dead ends: 89 [2020-10-12 10:09:20,199 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=782, Invalid=858, Unknown=0, NotChecked=0, Total=1640 [2020-10-12 10:09:20,200 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2020-10-12 10:09:20,207 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 76. [2020-10-12 10:09:20,207 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2020-10-12 10:09:20,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 78 transitions. [2020-10-12 10:09:20,208 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 78 transitions. Word has length 72 [2020-10-12 10:09:20,208 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 10:09:20,208 INFO L479 AbstractCegarLoop]: Abstraction has 76 states and 78 transitions. [2020-10-12 10:09:20,208 INFO L480 AbstractCegarLoop]: Interpolant automaton has 41 states. [2020-10-12 10:09:20,208 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 78 transitions. [2020-10-12 10:09:20,209 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2020-10-12 10:09:20,209 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 10:09:20,209 INFO L422 BasicCegarLoop]: trace histogram [38, 6, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 10:09:20,209 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2020-10-12 10:09:20,209 INFO L427 AbstractCegarLoop]: === Iteration 45 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 10:09:20,210 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 10:09:20,210 INFO L82 PathProgramCache]: Analyzing trace with hash -1338891610, now seen corresponding path program 41 times [2020-10-12 10:09:20,210 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 10:09:20,210 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [699836328] [2020-10-12 10:09:20,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 10:09:20,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:09:20,238 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:09:20,736 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:09:25,269 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:09:25,270 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 85 [2020-10-12 10:09:25,270 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 10:09:25,270 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5041 [2020-10-12 10:09:25,270 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:09:25,270 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 40 [2020-10-12 10:09:25,270 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 10:09:25,270 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 40 [2020-10-12 10:09:25,271 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:09:26,177 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 10:09:26,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:09:26,179 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:09:26,180 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:09:26,180 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 10:09:26,181 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:09:26,181 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 10:09:26,181 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:09:26,181 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:09:26,181 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:09:26,181 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:09:26,181 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:09:26,182 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2020-10-12 10:09:26,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:09:26,183 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:09:26,183 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:09:26,184 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:09:26,184 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:09:26,184 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 10:09:26,184 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:09:26,184 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:09:26,184 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-12 10:09:26,184 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:09:26,184 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:09:26,185 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2020-10-12 10:09:26,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:09:26,186 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:09:26,187 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:09:26,187 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:09:26,187 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:09:26,187 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 10:09:26,188 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:09:26,188 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:09:26,188 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-12 10:09:26,188 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:09:26,188 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:09:26,194 INFO L134 CoverageAnalysis]: Checked inductivity of 777 backedges. 4 proven. 741 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2020-10-12 10:09:26,194 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [699836328] [2020-10-12 10:09:26,194 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 10:09:26,194 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42] total 42 [2020-10-12 10:09:26,195 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [930405483] [2020-10-12 10:09:26,195 INFO L459 AbstractCegarLoop]: Interpolant automaton has 42 states [2020-10-12 10:09:26,195 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 10:09:26,195 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2020-10-12 10:09:26,196 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=822, Invalid=900, Unknown=0, NotChecked=0, Total=1722 [2020-10-12 10:09:26,196 INFO L87 Difference]: Start difference. First operand 76 states and 78 transitions. Second operand 42 states. [2020-10-12 10:09:26,607 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 10:09:26,608 INFO L93 Difference]: Finished difference Result 121 states and 129 transitions. [2020-10-12 10:09:26,608 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2020-10-12 10:09:26,608 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 73 [2020-10-12 10:09:26,609 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 10:09:26,610 INFO L225 Difference]: With dead ends: 121 [2020-10-12 10:09:26,610 INFO L226 Difference]: Without dead ends: 90 [2020-10-12 10:09:26,612 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=822, Invalid=900, Unknown=0, NotChecked=0, Total=1722 [2020-10-12 10:09:26,612 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2020-10-12 10:09:26,621 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 77. [2020-10-12 10:09:26,622 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2020-10-12 10:09:26,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 79 transitions. [2020-10-12 10:09:26,623 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 79 transitions. Word has length 73 [2020-10-12 10:09:26,623 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 10:09:26,623 INFO L479 AbstractCegarLoop]: Abstraction has 77 states and 79 transitions. [2020-10-12 10:09:26,623 INFO L480 AbstractCegarLoop]: Interpolant automaton has 42 states. [2020-10-12 10:09:26,623 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 79 transitions. [2020-10-12 10:09:26,624 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2020-10-12 10:09:26,624 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 10:09:26,624 INFO L422 BasicCegarLoop]: trace histogram [39, 6, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 10:09:26,624 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2020-10-12 10:09:26,625 INFO L427 AbstractCegarLoop]: === Iteration 46 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 10:09:26,625 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 10:09:26,625 INFO L82 PathProgramCache]: Analyzing trace with hash -838966838, now seen corresponding path program 42 times [2020-10-12 10:09:26,625 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 10:09:26,625 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1345020294] [2020-10-12 10:09:26,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 10:09:26,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:09:26,659 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:09:26,685 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:09:31,673 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:09:31,673 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 86 [2020-10-12 10:09:31,673 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 10:09:31,673 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5027 [2020-10-12 10:09:31,673 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:09:31,673 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 41 [2020-10-12 10:09:31,673 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 10:09:31,674 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 41 [2020-10-12 10:09:31,674 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:09:32,694 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 10:09:32,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:09:32,695 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:09:32,696 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:09:32,697 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 10:09:32,697 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:09:32,697 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 10:09:32,697 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:09:32,698 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:09:32,698 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:09:32,698 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:09:32,698 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:09:32,699 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2020-10-12 10:09:32,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:09:32,699 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:09:32,700 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:09:32,700 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:09:32,700 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:09:32,700 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 10:09:32,700 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:09:32,700 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:09:32,701 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-12 10:09:32,701 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:09:32,701 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:09:32,701 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2020-10-12 10:09:32,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:09:32,702 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:09:32,703 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:09:32,703 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:09:32,703 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:09:32,703 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 10:09:32,703 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:09:32,703 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:09:32,703 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-12 10:09:32,703 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:09:32,704 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:09:32,707 INFO L134 CoverageAnalysis]: Checked inductivity of 816 backedges. 4 proven. 780 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2020-10-12 10:09:32,708 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1345020294] [2020-10-12 10:09:32,708 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 10:09:32,708 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43] total 43 [2020-10-12 10:09:32,708 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [924813895] [2020-10-12 10:09:32,709 INFO L459 AbstractCegarLoop]: Interpolant automaton has 43 states [2020-10-12 10:09:32,709 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 10:09:32,709 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2020-10-12 10:09:32,710 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=863, Invalid=943, Unknown=0, NotChecked=0, Total=1806 [2020-10-12 10:09:32,710 INFO L87 Difference]: Start difference. First operand 77 states and 79 transitions. Second operand 43 states. [2020-10-12 10:09:33,110 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 10:09:33,111 INFO L93 Difference]: Finished difference Result 122 states and 130 transitions. [2020-10-12 10:09:33,111 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2020-10-12 10:09:33,111 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 74 [2020-10-12 10:09:33,112 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 10:09:33,112 INFO L225 Difference]: With dead ends: 122 [2020-10-12 10:09:33,112 INFO L226 Difference]: Without dead ends: 91 [2020-10-12 10:09:33,113 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=863, Invalid=943, Unknown=0, NotChecked=0, Total=1806 [2020-10-12 10:09:33,114 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2020-10-12 10:09:33,128 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 78. [2020-10-12 10:09:33,128 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2020-10-12 10:09:33,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 80 transitions. [2020-10-12 10:09:33,129 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 80 transitions. Word has length 74 [2020-10-12 10:09:33,129 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 10:09:33,129 INFO L479 AbstractCegarLoop]: Abstraction has 78 states and 80 transitions. [2020-10-12 10:09:33,129 INFO L480 AbstractCegarLoop]: Interpolant automaton has 43 states. [2020-10-12 10:09:33,129 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 80 transitions. [2020-10-12 10:09:33,130 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2020-10-12 10:09:33,130 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 10:09:33,130 INFO L422 BasicCegarLoop]: trace histogram [40, 6, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 10:09:33,130 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2020-10-12 10:09:33,130 INFO L427 AbstractCegarLoop]: === Iteration 47 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 10:09:33,130 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 10:09:33,131 INFO L82 PathProgramCache]: Analyzing trace with hash 1773799206, now seen corresponding path program 43 times [2020-10-12 10:09:33,131 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 10:09:33,131 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [479249812] [2020-10-12 10:09:33,131 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 10:09:33,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:09:33,174 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:09:33,209 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:09:38,161 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:09:38,161 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 87 [2020-10-12 10:09:38,162 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 10:09:38,162 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-12 10:09:38,162 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:09:38,162 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 42 [2020-10-12 10:09:38,162 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 10:09:38,162 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 42 [2020-10-12 10:09:38,162 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:09:39,131 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 10:09:39,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:09:39,133 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:09:39,134 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:09:39,134 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 10:09:39,134 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:09:39,134 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 10:09:39,134 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:09:39,135 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:09:39,135 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:09:39,135 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:09:39,135 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:09:39,136 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2020-10-12 10:09:39,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:09:39,136 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:09:39,137 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:09:39,137 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:09:39,137 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:09:39,137 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 10:09:39,137 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:09:39,137 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:09:39,138 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-12 10:09:39,138 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:09:39,138 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:09:39,138 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2020-10-12 10:09:39,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:09:39,139 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:09:39,140 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:09:39,140 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:09:39,140 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:09:39,140 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 10:09:39,140 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:09:39,140 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:09:39,140 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-12 10:09:39,141 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:09:39,141 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:09:39,145 INFO L134 CoverageAnalysis]: Checked inductivity of 856 backedges. 4 proven. 820 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2020-10-12 10:09:39,145 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [479249812] [2020-10-12 10:09:39,145 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 10:09:39,146 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [44] total 44 [2020-10-12 10:09:39,146 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [722628482] [2020-10-12 10:09:39,146 INFO L459 AbstractCegarLoop]: Interpolant automaton has 44 states [2020-10-12 10:09:39,146 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 10:09:39,146 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2020-10-12 10:09:39,147 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=905, Invalid=987, Unknown=0, NotChecked=0, Total=1892 [2020-10-12 10:09:39,147 INFO L87 Difference]: Start difference. First operand 78 states and 80 transitions. Second operand 44 states. [2020-10-12 10:09:39,450 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 10:09:39,450 INFO L93 Difference]: Finished difference Result 123 states and 131 transitions. [2020-10-12 10:09:39,450 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2020-10-12 10:09:39,451 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 75 [2020-10-12 10:09:39,451 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 10:09:39,452 INFO L225 Difference]: With dead ends: 123 [2020-10-12 10:09:39,452 INFO L226 Difference]: Without dead ends: 92 [2020-10-12 10:09:39,453 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=905, Invalid=987, Unknown=0, NotChecked=0, Total=1892 [2020-10-12 10:09:39,453 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2020-10-12 10:09:39,462 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 79. [2020-10-12 10:09:39,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2020-10-12 10:09:39,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 81 transitions. [2020-10-12 10:09:39,463 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 81 transitions. Word has length 75 [2020-10-12 10:09:39,463 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 10:09:39,463 INFO L479 AbstractCegarLoop]: Abstraction has 79 states and 81 transitions. [2020-10-12 10:09:39,463 INFO L480 AbstractCegarLoop]: Interpolant automaton has 44 states. [2020-10-12 10:09:39,463 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 81 transitions. [2020-10-12 10:09:39,464 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2020-10-12 10:09:39,464 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 10:09:39,464 INFO L422 BasicCegarLoop]: trace histogram [41, 6, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 10:09:39,464 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2020-10-12 10:09:39,464 INFO L427 AbstractCegarLoop]: === Iteration 48 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 10:09:39,464 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 10:09:39,465 INFO L82 PathProgramCache]: Analyzing trace with hash 1165167946, now seen corresponding path program 44 times [2020-10-12 10:09:39,465 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 10:09:39,465 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1953983531] [2020-10-12 10:09:39,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 10:09:39,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:09:39,491 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:09:39,520 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:09:44,494 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:09:44,494 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 88 [2020-10-12 10:09:44,495 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 10:09:44,495 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5013 [2020-10-12 10:09:44,495 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:09:44,495 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 43 [2020-10-12 10:09:44,495 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 10:09:44,495 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 43 [2020-10-12 10:09:44,495 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:09:45,486 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 10:09:45,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:09:45,488 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:09:45,489 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:09:45,489 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 10:09:45,489 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:09:45,489 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 10:09:45,490 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:09:45,490 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:09:45,490 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:09:45,490 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:09:45,490 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:09:45,491 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2020-10-12 10:09:45,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:09:45,491 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:09:45,492 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:09:45,492 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:09:45,492 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:09:45,493 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 10:09:45,493 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:09:45,493 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:09:45,493 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-12 10:09:45,493 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:09:45,493 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:09:45,494 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2020-10-12 10:09:45,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:09:45,495 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:09:45,495 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:09:45,495 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:09:45,495 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:09:45,495 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 10:09:45,496 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:09:45,496 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:09:45,496 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-12 10:09:45,496 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:09:45,496 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:09:45,500 INFO L134 CoverageAnalysis]: Checked inductivity of 897 backedges. 4 proven. 861 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2020-10-12 10:09:45,500 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1953983531] [2020-10-12 10:09:45,500 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 10:09:45,500 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [45] total 45 [2020-10-12 10:09:45,501 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [646530536] [2020-10-12 10:09:45,501 INFO L459 AbstractCegarLoop]: Interpolant automaton has 45 states [2020-10-12 10:09:45,501 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 10:09:45,501 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2020-10-12 10:09:45,502 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=948, Invalid=1032, Unknown=0, NotChecked=0, Total=1980 [2020-10-12 10:09:45,502 INFO L87 Difference]: Start difference. First operand 79 states and 81 transitions. Second operand 45 states. [2020-10-12 10:09:45,842 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 10:09:45,842 INFO L93 Difference]: Finished difference Result 124 states and 132 transitions. [2020-10-12 10:09:45,843 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2020-10-12 10:09:45,843 INFO L78 Accepts]: Start accepts. Automaton has 45 states. Word has length 76 [2020-10-12 10:09:45,843 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 10:09:45,845 INFO L225 Difference]: With dead ends: 124 [2020-10-12 10:09:45,845 INFO L226 Difference]: Without dead ends: 93 [2020-10-12 10:09:45,846 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=948, Invalid=1032, Unknown=0, NotChecked=0, Total=1980 [2020-10-12 10:09:45,846 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2020-10-12 10:09:45,855 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 80. [2020-10-12 10:09:45,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2020-10-12 10:09:45,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 82 transitions. [2020-10-12 10:09:45,856 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 82 transitions. Word has length 76 [2020-10-12 10:09:45,856 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 10:09:45,856 INFO L479 AbstractCegarLoop]: Abstraction has 80 states and 82 transitions. [2020-10-12 10:09:45,856 INFO L480 AbstractCegarLoop]: Interpolant automaton has 45 states. [2020-10-12 10:09:45,856 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 82 transitions. [2020-10-12 10:09:45,857 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2020-10-12 10:09:45,857 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 10:09:45,857 INFO L422 BasicCegarLoop]: trace histogram [42, 6, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 10:09:45,857 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2020-10-12 10:09:45,858 INFO L427 AbstractCegarLoop]: === Iteration 49 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 10:09:45,858 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 10:09:45,858 INFO L82 PathProgramCache]: Analyzing trace with hash -522531930, now seen corresponding path program 45 times [2020-10-12 10:09:45,858 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 10:09:45,858 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1381580152] [2020-10-12 10:09:45,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 10:09:45,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:09:45,885 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:09:45,911 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:09:50,908 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:09:50,908 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 89 [2020-10-12 10:09:50,908 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 10:09:50,908 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5033 [2020-10-12 10:09:50,909 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:09:50,909 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 44 [2020-10-12 10:09:50,909 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 10:09:50,909 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 44 [2020-10-12 10:09:50,909 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:09:51,953 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 10:09:51,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:09:51,956 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:09:51,957 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:09:51,957 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 10:09:51,957 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:09:51,958 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 10:09:51,958 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:09:51,958 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:09:51,958 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:09:51,958 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:09:51,958 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:09:51,959 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2020-10-12 10:09:51,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:09:51,960 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:09:51,960 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:09:51,960 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:09:51,960 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:09:51,961 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 10:09:51,961 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:09:51,961 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:09:51,961 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-12 10:09:51,961 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:09:51,961 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:09:51,962 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2020-10-12 10:09:51,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:09:51,963 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:09:51,963 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:09:51,964 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:09:51,964 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:09:51,964 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 10:09:51,964 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:09:51,964 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:09:51,964 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-12 10:09:51,964 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:09:51,964 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:09:51,969 INFO L134 CoverageAnalysis]: Checked inductivity of 939 backedges. 4 proven. 903 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2020-10-12 10:09:51,970 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1381580152] [2020-10-12 10:09:51,970 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 10:09:51,970 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [46] total 46 [2020-10-12 10:09:51,970 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1945854778] [2020-10-12 10:09:51,971 INFO L459 AbstractCegarLoop]: Interpolant automaton has 46 states [2020-10-12 10:09:51,971 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 10:09:51,971 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2020-10-12 10:09:51,972 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=992, Invalid=1078, Unknown=0, NotChecked=0, Total=2070 [2020-10-12 10:09:51,972 INFO L87 Difference]: Start difference. First operand 80 states and 82 transitions. Second operand 46 states. [2020-10-12 10:09:52,427 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 10:09:52,427 INFO L93 Difference]: Finished difference Result 125 states and 133 transitions. [2020-10-12 10:09:52,428 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2020-10-12 10:09:52,428 INFO L78 Accepts]: Start accepts. Automaton has 46 states. Word has length 77 [2020-10-12 10:09:52,428 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 10:09:52,429 INFO L225 Difference]: With dead ends: 125 [2020-10-12 10:09:52,429 INFO L226 Difference]: Without dead ends: 94 [2020-10-12 10:09:52,430 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=992, Invalid=1078, Unknown=0, NotChecked=0, Total=2070 [2020-10-12 10:09:52,431 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2020-10-12 10:09:52,439 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 81. [2020-10-12 10:09:52,439 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-10-12 10:09:52,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 83 transitions. [2020-10-12 10:09:52,440 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 83 transitions. Word has length 77 [2020-10-12 10:09:52,441 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 10:09:52,441 INFO L479 AbstractCegarLoop]: Abstraction has 81 states and 83 transitions. [2020-10-12 10:09:52,441 INFO L480 AbstractCegarLoop]: Interpolant automaton has 46 states. [2020-10-12 10:09:52,441 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 83 transitions. [2020-10-12 10:09:52,441 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2020-10-12 10:09:52,442 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 10:09:52,442 INFO L422 BasicCegarLoop]: trace histogram [43, 6, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 10:09:52,442 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2020-10-12 10:09:52,442 INFO L427 AbstractCegarLoop]: === Iteration 50 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 10:09:52,442 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 10:09:52,442 INFO L82 PathProgramCache]: Analyzing trace with hash -1301620534, now seen corresponding path program 46 times [2020-10-12 10:09:52,443 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 10:09:52,443 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [343686310] [2020-10-12 10:09:52,443 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 10:09:52,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:09:52,475 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:09:52,506 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:09:57,486 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:09:57,486 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 90 [2020-10-12 10:09:57,486 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 10:09:57,486 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5020 [2020-10-12 10:09:57,486 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:09:57,486 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 45 [2020-10-12 10:09:57,486 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 10:09:57,487 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 45 [2020-10-12 10:09:57,487 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:09:58,588 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 10:09:58,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:09:58,590 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:09:58,591 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:09:58,592 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 10:09:58,592 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:09:58,592 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 10:09:58,592 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:09:58,593 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:09:58,593 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:09:58,593 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:09:58,593 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:09:58,594 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2020-10-12 10:09:58,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:09:58,594 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:09:58,595 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:09:58,595 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:09:58,595 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:09:58,595 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 10:09:58,595 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:09:58,595 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:09:58,596 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-12 10:09:58,596 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:09:58,596 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:09:58,596 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2020-10-12 10:09:58,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:09:58,597 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:09:58,597 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:09:58,597 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:09:58,598 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:09:58,598 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 10:09:58,598 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:09:58,598 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:09:58,598 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-12 10:09:58,598 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:09:58,598 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:09:58,603 INFO L134 CoverageAnalysis]: Checked inductivity of 982 backedges. 4 proven. 946 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2020-10-12 10:09:58,603 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [343686310] [2020-10-12 10:09:58,603 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 10:09:58,603 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [47] total 47 [2020-10-12 10:09:58,603 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [432566612] [2020-10-12 10:09:58,603 INFO L459 AbstractCegarLoop]: Interpolant automaton has 47 states [2020-10-12 10:09:58,604 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 10:09:58,604 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2020-10-12 10:09:58,604 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1037, Invalid=1125, Unknown=0, NotChecked=0, Total=2162 [2020-10-12 10:09:58,604 INFO L87 Difference]: Start difference. First operand 81 states and 83 transitions. Second operand 47 states. [2020-10-12 10:09:58,975 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 10:09:58,976 INFO L93 Difference]: Finished difference Result 130 states and 140 transitions. [2020-10-12 10:09:58,976 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2020-10-12 10:09:58,976 INFO L78 Accepts]: Start accepts. Automaton has 47 states. Word has length 78 [2020-10-12 10:09:58,977 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 10:09:58,977 INFO L225 Difference]: With dead ends: 130 [2020-10-12 10:09:58,978 INFO L226 Difference]: Without dead ends: 99 [2020-10-12 10:09:58,978 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1037, Invalid=1125, Unknown=0, NotChecked=0, Total=2162 [2020-10-12 10:09:58,979 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2020-10-12 10:09:58,994 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 83. [2020-10-12 10:09:58,994 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2020-10-12 10:09:58,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 85 transitions. [2020-10-12 10:09:58,997 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 85 transitions. Word has length 78 [2020-10-12 10:09:58,997 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 10:09:58,997 INFO L479 AbstractCegarLoop]: Abstraction has 83 states and 85 transitions. [2020-10-12 10:09:58,997 INFO L480 AbstractCegarLoop]: Interpolant automaton has 47 states. [2020-10-12 10:09:58,997 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 85 transitions. [2020-10-12 10:09:58,998 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2020-10-12 10:09:58,998 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 10:09:58,998 INFO L422 BasicCegarLoop]: trace histogram [44, 7, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 10:09:58,998 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2020-10-12 10:09:59,000 INFO L427 AbstractCegarLoop]: === Iteration 51 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 10:09:59,000 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 10:09:59,000 INFO L82 PathProgramCache]: Analyzing trace with hash 779946601, now seen corresponding path program 47 times [2020-10-12 10:09:59,001 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 10:09:59,001 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1658769070] [2020-10-12 10:09:59,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 10:09:59,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:09:59,046 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:09:59,884 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:10:04,028 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:10:04,028 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 92 [2020-10-12 10:10:04,028 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 10:10:04,028 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-12 10:10:04,028 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:10:04,029 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 46 [2020-10-12 10:10:04,029 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 10:10:04,029 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 46 [2020-10-12 10:10:04,029 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:10:05,152 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 10:10:05,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:10:05,154 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:10:05,155 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:10:05,155 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 10:10:05,155 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:10:05,155 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 10:10:05,155 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:10:05,155 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:10:05,156 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:10:05,156 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:10:05,156 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:10:05,156 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2020-10-12 10:10:05,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:10:05,157 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:10:05,158 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:10:05,158 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:10:05,158 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:10:05,158 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 10:10:05,159 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:10:05,159 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:10:05,159 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-12 10:10:05,159 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:10:05,159 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:10:05,160 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2020-10-12 10:10:05,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:10:05,161 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:10:05,162 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:10:05,162 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:10:05,162 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:10:05,162 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 10:10:05,162 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:10:05,163 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:10:05,163 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-12 10:10:05,163 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:10:05,163 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:10:05,168 INFO L134 CoverageAnalysis]: Checked inductivity of 1033 backedges. 4 proven. 990 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2020-10-12 10:10:05,168 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1658769070] [2020-10-12 10:10:05,168 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 10:10:05,168 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [48] total 48 [2020-10-12 10:10:05,169 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [969340091] [2020-10-12 10:10:05,169 INFO L459 AbstractCegarLoop]: Interpolant automaton has 48 states [2020-10-12 10:10:05,169 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 10:10:05,169 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2020-10-12 10:10:05,170 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1083, Invalid=1173, Unknown=0, NotChecked=0, Total=2256 [2020-10-12 10:10:05,170 INFO L87 Difference]: Start difference. First operand 83 states and 85 transitions. Second operand 48 states. [2020-10-12 10:10:05,471 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 10:10:05,472 INFO L93 Difference]: Finished difference Result 132 states and 141 transitions. [2020-10-12 10:10:05,472 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2020-10-12 10:10:05,472 INFO L78 Accepts]: Start accepts. Automaton has 48 states. Word has length 80 [2020-10-12 10:10:05,473 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 10:10:05,474 INFO L225 Difference]: With dead ends: 132 [2020-10-12 10:10:05,474 INFO L226 Difference]: Without dead ends: 100 [2020-10-12 10:10:05,475 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1083, Invalid=1173, Unknown=0, NotChecked=0, Total=2256 [2020-10-12 10:10:05,475 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2020-10-12 10:10:05,483 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 84. [2020-10-12 10:10:05,483 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2020-10-12 10:10:05,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 86 transitions. [2020-10-12 10:10:05,484 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 86 transitions. Word has length 80 [2020-10-12 10:10:05,484 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 10:10:05,484 INFO L479 AbstractCegarLoop]: Abstraction has 84 states and 86 transitions. [2020-10-12 10:10:05,484 INFO L480 AbstractCegarLoop]: Interpolant automaton has 48 states. [2020-10-12 10:10:05,485 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 86 transitions. [2020-10-12 10:10:05,485 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2020-10-12 10:10:05,485 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 10:10:05,485 INFO L422 BasicCegarLoop]: trace histogram [45, 7, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 10:10:05,485 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2020-10-12 10:10:05,485 INFO L427 AbstractCegarLoop]: === Iteration 52 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 10:10:05,486 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 10:10:05,486 INFO L82 PathProgramCache]: Analyzing trace with hash 954612421, now seen corresponding path program 48 times [2020-10-12 10:10:05,486 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 10:10:05,486 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [275324245] [2020-10-12 10:10:05,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 10:10:05,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:10:05,518 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:10:06,383 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:10:10,507 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:10:10,507 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 93 [2020-10-12 10:10:10,507 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 10:10:10,507 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-12 10:10:10,507 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:10:10,507 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 47 [2020-10-12 10:10:10,507 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 10:10:10,508 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 47 [2020-10-12 10:10:10,508 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:10:11,693 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 10:10:11,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:10:11,695 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:10:11,697 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:10:11,697 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 10:10:11,697 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:10:11,697 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 10:10:11,697 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:10:11,697 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:10:11,697 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:10:11,698 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:10:11,698 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:10:11,698 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2020-10-12 10:10:11,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:10:11,699 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:10:11,700 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:10:11,700 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:10:11,700 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:10:11,700 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 10:10:11,700 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:10:11,701 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:10:11,701 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-12 10:10:11,701 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:10:11,701 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:10:11,701 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2020-10-12 10:10:11,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:10:11,702 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:10:11,703 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:10:11,703 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:10:11,703 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:10:11,704 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 10:10:11,704 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:10:11,704 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:10:11,704 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-12 10:10:11,704 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:10:11,705 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:10:11,709 INFO L134 CoverageAnalysis]: Checked inductivity of 1078 backedges. 4 proven. 1035 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2020-10-12 10:10:11,709 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [275324245] [2020-10-12 10:10:11,709 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 10:10:11,710 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [49] total 49 [2020-10-12 10:10:11,710 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1778571272] [2020-10-12 10:10:11,710 INFO L459 AbstractCegarLoop]: Interpolant automaton has 49 states [2020-10-12 10:10:11,710 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 10:10:11,711 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2020-10-12 10:10:11,711 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1130, Invalid=1222, Unknown=0, NotChecked=0, Total=2352 [2020-10-12 10:10:11,711 INFO L87 Difference]: Start difference. First operand 84 states and 86 transitions. Second operand 49 states. [2020-10-12 10:10:12,234 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 10:10:12,234 INFO L93 Difference]: Finished difference Result 133 states and 142 transitions. [2020-10-12 10:10:12,235 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2020-10-12 10:10:12,235 INFO L78 Accepts]: Start accepts. Automaton has 49 states. Word has length 81 [2020-10-12 10:10:12,235 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 10:10:12,236 INFO L225 Difference]: With dead ends: 133 [2020-10-12 10:10:12,236 INFO L226 Difference]: Without dead ends: 101 [2020-10-12 10:10:12,237 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1130, Invalid=1222, Unknown=0, NotChecked=0, Total=2352 [2020-10-12 10:10:12,238 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2020-10-12 10:10:12,248 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 85. [2020-10-12 10:10:12,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2020-10-12 10:10:12,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 87 transitions. [2020-10-12 10:10:12,249 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 87 transitions. Word has length 81 [2020-10-12 10:10:12,249 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 10:10:12,249 INFO L479 AbstractCegarLoop]: Abstraction has 85 states and 87 transitions. [2020-10-12 10:10:12,249 INFO L480 AbstractCegarLoop]: Interpolant automaton has 49 states. [2020-10-12 10:10:12,249 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 87 transitions. [2020-10-12 10:10:12,250 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2020-10-12 10:10:12,250 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 10:10:12,250 INFO L422 BasicCegarLoop]: trace histogram [46, 7, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 10:10:12,250 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2020-10-12 10:10:12,251 INFO L427 AbstractCegarLoop]: === Iteration 53 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 10:10:12,251 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 10:10:12,251 INFO L82 PathProgramCache]: Analyzing trace with hash 2074285545, now seen corresponding path program 49 times [2020-10-12 10:10:12,251 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 10:10:12,251 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1564872293] [2020-10-12 10:10:12,251 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 10:10:12,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:10:12,295 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:10:12,339 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:10:17,278 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:10:17,279 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 94 [2020-10-12 10:10:17,279 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 10:10:17,279 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-12 10:10:17,279 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:10:17,279 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 48 [2020-10-12 10:10:17,279 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 10:10:17,279 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 48 [2020-10-12 10:10:17,280 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:10:18,540 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 10:10:18,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:10:18,542 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:10:18,543 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:10:18,544 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 10:10:18,544 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:10:18,544 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 10:10:18,544 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:10:18,544 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:10:18,544 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:10:18,545 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:10:18,545 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:10:18,545 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2020-10-12 10:10:18,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:10:18,546 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:10:18,547 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:10:18,547 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:10:18,547 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:10:18,547 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 10:10:18,547 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:10:18,547 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:10:18,548 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-12 10:10:18,548 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:10:18,548 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:10:18,548 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2020-10-12 10:10:18,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:10:18,549 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:10:18,550 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:10:18,550 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:10:18,550 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:10:18,550 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 10:10:18,550 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:10:18,550 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:10:18,551 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-12 10:10:18,551 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:10:18,551 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:10:18,555 INFO L134 CoverageAnalysis]: Checked inductivity of 1124 backedges. 4 proven. 1081 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2020-10-12 10:10:18,556 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1564872293] [2020-10-12 10:10:18,556 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 10:10:18,556 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [50] total 50 [2020-10-12 10:10:18,556 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1542920996] [2020-10-12 10:10:18,556 INFO L459 AbstractCegarLoop]: Interpolant automaton has 50 states [2020-10-12 10:10:18,556 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 10:10:18,557 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2020-10-12 10:10:18,557 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1178, Invalid=1272, Unknown=0, NotChecked=0, Total=2450 [2020-10-12 10:10:18,557 INFO L87 Difference]: Start difference. First operand 85 states and 87 transitions. Second operand 50 states. [2020-10-12 10:10:19,080 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 10:10:19,080 INFO L93 Difference]: Finished difference Result 134 states and 143 transitions. [2020-10-12 10:10:19,081 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2020-10-12 10:10:19,081 INFO L78 Accepts]: Start accepts. Automaton has 50 states. Word has length 82 [2020-10-12 10:10:19,081 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 10:10:19,082 INFO L225 Difference]: With dead ends: 134 [2020-10-12 10:10:19,082 INFO L226 Difference]: Without dead ends: 102 [2020-10-12 10:10:19,083 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1178, Invalid=1272, Unknown=0, NotChecked=0, Total=2450 [2020-10-12 10:10:19,083 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2020-10-12 10:10:19,092 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 86. [2020-10-12 10:10:19,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2020-10-12 10:10:19,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 88 transitions. [2020-10-12 10:10:19,093 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 88 transitions. Word has length 82 [2020-10-12 10:10:19,093 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 10:10:19,093 INFO L479 AbstractCegarLoop]: Abstraction has 86 states and 88 transitions. [2020-10-12 10:10:19,093 INFO L480 AbstractCegarLoop]: Interpolant automaton has 50 states. [2020-10-12 10:10:19,093 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 88 transitions. [2020-10-12 10:10:19,094 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2020-10-12 10:10:19,094 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 10:10:19,094 INFO L422 BasicCegarLoop]: trace histogram [47, 7, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 10:10:19,094 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2020-10-12 10:10:19,094 INFO L427 AbstractCegarLoop]: === Iteration 54 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 10:10:19,094 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 10:10:19,094 INFO L82 PathProgramCache]: Analyzing trace with hash -1870553275, now seen corresponding path program 50 times [2020-10-12 10:10:19,095 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 10:10:19,095 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [856093087] [2020-10-12 10:10:19,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 10:10:19,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:10:19,134 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:10:19,174 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:10:24,134 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:10:24,134 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 95 [2020-10-12 10:10:24,135 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 10:10:24,135 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5014 [2020-10-12 10:10:24,135 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:10:24,135 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 49 [2020-10-12 10:10:24,135 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 10:10:24,135 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 49 [2020-10-12 10:10:24,135 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:10:25,446 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 10:10:25,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:10:25,448 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:10:25,449 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:10:25,449 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 10:10:25,449 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:10:25,449 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 10:10:25,449 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:10:25,449 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:10:25,449 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:10:25,450 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:10:25,450 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:10:25,450 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2020-10-12 10:10:25,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:10:25,451 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:10:25,452 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:10:25,452 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:10:25,452 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:10:25,452 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 10:10:25,452 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:10:25,452 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:10:25,452 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-12 10:10:25,452 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:10:25,453 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:10:25,453 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 72 [2020-10-12 10:10:25,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:10:25,454 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:10:25,455 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:10:25,455 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:10:25,455 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:10:25,455 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 10:10:25,455 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:10:25,456 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:10:25,456 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-12 10:10:25,456 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:10:25,456 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:10:25,461 INFO L134 CoverageAnalysis]: Checked inductivity of 1171 backedges. 4 proven. 1128 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2020-10-12 10:10:25,462 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [856093087] [2020-10-12 10:10:25,462 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 10:10:25,462 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [51] total 51 [2020-10-12 10:10:25,462 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [721283916] [2020-10-12 10:10:25,462 INFO L459 AbstractCegarLoop]: Interpolant automaton has 51 states [2020-10-12 10:10:25,462 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 10:10:25,463 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2020-10-12 10:10:25,463 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1227, Invalid=1323, Unknown=0, NotChecked=0, Total=2550 [2020-10-12 10:10:25,463 INFO L87 Difference]: Start difference. First operand 86 states and 88 transitions. Second operand 51 states. [2020-10-12 10:10:26,017 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 10:10:26,017 INFO L93 Difference]: Finished difference Result 135 states and 144 transitions. [2020-10-12 10:10:26,018 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2020-10-12 10:10:26,018 INFO L78 Accepts]: Start accepts. Automaton has 51 states. Word has length 83 [2020-10-12 10:10:26,019 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 10:10:26,019 INFO L225 Difference]: With dead ends: 135 [2020-10-12 10:10:26,020 INFO L226 Difference]: Without dead ends: 103 [2020-10-12 10:10:26,020 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1227, Invalid=1323, Unknown=0, NotChecked=0, Total=2550 [2020-10-12 10:10:26,021 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2020-10-12 10:10:26,031 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 87. [2020-10-12 10:10:26,032 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2020-10-12 10:10:26,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 89 transitions. [2020-10-12 10:10:26,032 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 89 transitions. Word has length 83 [2020-10-12 10:10:26,033 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 10:10:26,033 INFO L479 AbstractCegarLoop]: Abstraction has 87 states and 89 transitions. [2020-10-12 10:10:26,033 INFO L480 AbstractCegarLoop]: Interpolant automaton has 51 states. [2020-10-12 10:10:26,033 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 89 transitions. [2020-10-12 10:10:26,033 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2020-10-12 10:10:26,034 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 10:10:26,034 INFO L422 BasicCegarLoop]: trace histogram [48, 7, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 10:10:26,034 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2020-10-12 10:10:26,034 INFO L427 AbstractCegarLoop]: === Iteration 55 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 10:10:26,034 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 10:10:26,034 INFO L82 PathProgramCache]: Analyzing trace with hash 393494889, now seen corresponding path program 51 times [2020-10-12 10:10:26,035 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 10:10:26,035 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1078629545] [2020-10-12 10:10:26,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 10:10:26,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:10:26,074 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:10:26,117 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:10:31,106 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:10:31,106 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 96 [2020-10-12 10:10:31,106 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 10:10:31,106 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5045 [2020-10-12 10:10:31,107 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:10:31,107 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 50 [2020-10-12 10:10:31,107 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 10:10:31,107 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 50 [2020-10-12 10:10:31,107 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:10:32,459 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 10:10:32,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:10:32,461 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:10:32,462 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:10:32,462 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 10:10:32,463 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:10:32,463 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 10:10:32,463 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:10:32,463 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:10:32,463 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:10:32,463 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:10:32,464 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:10:32,465 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2020-10-12 10:10:32,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:10:32,466 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:10:32,466 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:10:32,466 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:10:32,466 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:10:32,466 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 10:10:32,467 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:10:32,467 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:10:32,467 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-12 10:10:32,467 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:10:32,467 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:10:32,468 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2020-10-12 10:10:32,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:10:32,469 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:10:32,470 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:10:32,470 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:10:32,470 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:10:32,470 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 10:10:32,470 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:10:32,470 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:10:32,471 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-12 10:10:32,471 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:10:32,471 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:10:32,475 INFO L134 CoverageAnalysis]: Checked inductivity of 1219 backedges. 4 proven. 1176 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2020-10-12 10:10:32,476 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1078629545] [2020-10-12 10:10:32,476 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 10:10:32,476 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [52] total 52 [2020-10-12 10:10:32,476 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1405372049] [2020-10-12 10:10:32,476 INFO L459 AbstractCegarLoop]: Interpolant automaton has 52 states [2020-10-12 10:10:32,476 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 10:10:32,477 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2020-10-12 10:10:32,478 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1277, Invalid=1375, Unknown=0, NotChecked=0, Total=2652 [2020-10-12 10:10:32,478 INFO L87 Difference]: Start difference. First operand 87 states and 89 transitions. Second operand 52 states. [2020-10-12 10:10:33,019 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 10:10:33,019 INFO L93 Difference]: Finished difference Result 136 states and 145 transitions. [2020-10-12 10:10:33,021 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2020-10-12 10:10:33,021 INFO L78 Accepts]: Start accepts. Automaton has 52 states. Word has length 84 [2020-10-12 10:10:33,022 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 10:10:33,023 INFO L225 Difference]: With dead ends: 136 [2020-10-12 10:10:33,023 INFO L226 Difference]: Without dead ends: 104 [2020-10-12 10:10:33,024 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1277, Invalid=1375, Unknown=0, NotChecked=0, Total=2652 [2020-10-12 10:10:33,024 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2020-10-12 10:10:33,033 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 88. [2020-10-12 10:10:33,033 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2020-10-12 10:10:33,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 90 transitions. [2020-10-12 10:10:33,034 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 90 transitions. Word has length 84 [2020-10-12 10:10:33,034 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 10:10:33,034 INFO L479 AbstractCegarLoop]: Abstraction has 88 states and 90 transitions. [2020-10-12 10:10:33,034 INFO L480 AbstractCegarLoop]: Interpolant automaton has 52 states. [2020-10-12 10:10:33,034 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 90 transitions. [2020-10-12 10:10:33,034 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2020-10-12 10:10:33,035 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 10:10:33,035 INFO L422 BasicCegarLoop]: trace histogram [49, 7, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 10:10:33,035 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2020-10-12 10:10:33,035 INFO L427 AbstractCegarLoop]: === Iteration 56 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 10:10:33,035 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 10:10:33,035 INFO L82 PathProgramCache]: Analyzing trace with hash 1859511237, now seen corresponding path program 52 times [2020-10-12 10:10:33,035 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 10:10:33,035 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [550643048] [2020-10-12 10:10:33,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 10:10:33,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:10:33,082 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:10:34,356 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:10:38,067 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:10:38,067 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 97 [2020-10-12 10:10:38,067 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 10:10:38,067 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5006 [2020-10-12 10:10:38,068 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:10:38,068 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 51 [2020-10-12 10:10:38,068 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 10:10:38,068 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 51 [2020-10-12 10:10:38,068 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:10:39,496 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 10:10:39,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:10:39,498 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:10:39,499 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:10:39,499 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 10:10:39,500 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:10:39,500 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 10:10:39,500 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:10:39,500 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:10:39,500 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:10:39,500 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:10:39,501 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:10:39,501 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2020-10-12 10:10:39,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:10:39,502 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:10:39,503 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:10:39,503 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:10:39,503 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:10:39,503 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 10:10:39,503 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:10:39,503 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:10:39,503 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-12 10:10:39,503 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:10:39,503 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:10:39,504 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 74 [2020-10-12 10:10:39,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:10:39,505 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:10:39,505 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:10:39,505 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:10:39,505 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:10:39,505 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 10:10:39,505 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:10:39,505 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:10:39,506 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-12 10:10:39,506 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:10:39,506 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:10:39,510 INFO L134 CoverageAnalysis]: Checked inductivity of 1268 backedges. 4 proven. 1225 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2020-10-12 10:10:39,511 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [550643048] [2020-10-12 10:10:39,511 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 10:10:39,511 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [53] total 53 [2020-10-12 10:10:39,511 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2060844082] [2020-10-12 10:10:39,511 INFO L459 AbstractCegarLoop]: Interpolant automaton has 53 states [2020-10-12 10:10:39,511 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 10:10:39,512 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2020-10-12 10:10:39,512 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1328, Invalid=1428, Unknown=0, NotChecked=0, Total=2756 [2020-10-12 10:10:39,513 INFO L87 Difference]: Start difference. First operand 88 states and 90 transitions. Second operand 53 states. [2020-10-12 10:10:40,182 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 10:10:40,183 INFO L93 Difference]: Finished difference Result 137 states and 146 transitions. [2020-10-12 10:10:40,184 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2020-10-12 10:10:40,184 INFO L78 Accepts]: Start accepts. Automaton has 53 states. Word has length 85 [2020-10-12 10:10:40,184 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 10:10:40,185 INFO L225 Difference]: With dead ends: 137 [2020-10-12 10:10:40,185 INFO L226 Difference]: Without dead ends: 105 [2020-10-12 10:10:40,186 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1328, Invalid=1428, Unknown=0, NotChecked=0, Total=2756 [2020-10-12 10:10:40,187 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2020-10-12 10:10:40,205 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 89. [2020-10-12 10:10:40,205 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2020-10-12 10:10:40,206 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 91 transitions. [2020-10-12 10:10:40,207 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 91 transitions. Word has length 85 [2020-10-12 10:10:40,207 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 10:10:40,207 INFO L479 AbstractCegarLoop]: Abstraction has 89 states and 91 transitions. [2020-10-12 10:10:40,207 INFO L480 AbstractCegarLoop]: Interpolant automaton has 53 states. [2020-10-12 10:10:40,207 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 91 transitions. [2020-10-12 10:10:40,208 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2020-10-12 10:10:40,208 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 10:10:40,208 INFO L422 BasicCegarLoop]: trace histogram [50, 7, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 10:10:40,208 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2020-10-12 10:10:40,208 INFO L427 AbstractCegarLoop]: === Iteration 57 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 10:10:40,209 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 10:10:40,209 INFO L82 PathProgramCache]: Analyzing trace with hash 61377769, now seen corresponding path program 53 times [2020-10-12 10:10:40,209 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 10:10:40,209 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1357390775] [2020-10-12 10:10:40,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 10:10:40,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:10:40,261 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:10:41,768 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:10:45,251 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:10:45,252 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 98 [2020-10-12 10:10:45,252 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 10:10:45,252 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5015 [2020-10-12 10:10:45,252 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:10:45,252 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 52 [2020-10-12 10:10:45,252 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 10:10:45,252 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 52 [2020-10-12 10:10:45,252 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:10:46,797 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 10:10:46,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:10:46,800 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:10:46,801 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:10:46,801 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 10:10:46,802 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:10:46,802 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 10:10:46,802 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:10:46,802 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:10:46,802 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:10:46,802 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:10:46,802 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:10:46,803 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2020-10-12 10:10:46,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:10:46,804 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:10:46,804 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:10:46,804 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:10:46,804 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:10:46,805 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 10:10:46,805 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:10:46,805 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:10:46,805 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-12 10:10:46,805 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:10:46,805 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:10:46,806 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2020-10-12 10:10:46,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:10:46,807 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:10:46,807 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:10:46,807 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:10:46,807 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:10:46,807 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 10:10:46,807 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:10:46,808 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:10:46,808 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-12 10:10:46,808 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:10:46,808 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:10:46,813 INFO L134 CoverageAnalysis]: Checked inductivity of 1318 backedges. 4 proven. 1275 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2020-10-12 10:10:46,814 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1357390775] [2020-10-12 10:10:46,814 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 10:10:46,814 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [54] total 54 [2020-10-12 10:10:46,814 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1829050007] [2020-10-12 10:10:46,814 INFO L459 AbstractCegarLoop]: Interpolant automaton has 54 states [2020-10-12 10:10:46,814 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 10:10:46,815 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2020-10-12 10:10:46,815 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1380, Invalid=1482, Unknown=0, NotChecked=0, Total=2862 [2020-10-12 10:10:46,815 INFO L87 Difference]: Start difference. First operand 89 states and 91 transitions. Second operand 54 states. [2020-10-12 10:10:47,428 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 10:10:47,428 INFO L93 Difference]: Finished difference Result 142 states and 153 transitions. [2020-10-12 10:10:47,429 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2020-10-12 10:10:47,429 INFO L78 Accepts]: Start accepts. Automaton has 54 states. Word has length 86 [2020-10-12 10:10:47,430 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 10:10:47,430 INFO L225 Difference]: With dead ends: 142 [2020-10-12 10:10:47,431 INFO L226 Difference]: Without dead ends: 110 [2020-10-12 10:10:47,431 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=1380, Invalid=1482, Unknown=0, NotChecked=0, Total=2862 [2020-10-12 10:10:47,432 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2020-10-12 10:10:47,443 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 91. [2020-10-12 10:10:47,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2020-10-12 10:10:47,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 93 transitions. [2020-10-12 10:10:47,444 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 93 transitions. Word has length 86 [2020-10-12 10:10:47,444 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 10:10:47,444 INFO L479 AbstractCegarLoop]: Abstraction has 91 states and 93 transitions. [2020-10-12 10:10:47,444 INFO L480 AbstractCegarLoop]: Interpolant automaton has 54 states. [2020-10-12 10:10:47,445 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 93 transitions. [2020-10-12 10:10:47,445 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2020-10-12 10:10:47,445 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 10:10:47,445 INFO L422 BasicCegarLoop]: trace histogram [51, 8, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 10:10:47,446 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2020-10-12 10:10:47,446 INFO L427 AbstractCegarLoop]: === Iteration 58 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 10:10:47,446 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 10:10:47,446 INFO L82 PathProgramCache]: Analyzing trace with hash 33650218, now seen corresponding path program 54 times [2020-10-12 10:10:47,446 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 10:10:47,447 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [316894035] [2020-10-12 10:10:47,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 10:10:47,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:10:47,483 FATAL L256 erpolLogProxyWrapper]: Now shrinking...