/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_copy7_ground-1.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-adbd35c [2020-10-12 09:51:14,410 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-12 09:51:14,413 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-12 09:51:14,449 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-12 09:51:14,450 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-12 09:51:14,458 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-12 09:51:14,460 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-12 09:51:14,464 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-12 09:51:14,467 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-12 09:51:14,470 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-12 09:51:14,471 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-12 09:51:14,473 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-12 09:51:14,473 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-12 09:51:14,476 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-12 09:51:14,479 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-12 09:51:14,482 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-12 09:51:14,484 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-12 09:51:14,485 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-12 09:51:14,487 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-12 09:51:14,495 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-12 09:51:14,497 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-12 09:51:14,498 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-12 09:51:14,499 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-12 09:51:14,500 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-12 09:51:14,512 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-12 09:51:14,512 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-12 09:51:14,512 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-12 09:51:14,513 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-12 09:51:14,514 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-12 09:51:14,518 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-12 09:51:14,518 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-12 09:51:14,522 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-12 09:51:14,523 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-12 09:51:14,524 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-12 09:51:14,525 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-12 09:51:14,525 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-12 09:51:14,526 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-12 09:51:14,526 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-12 09:51:14,526 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-12 09:51:14,527 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-12 09:51:14,531 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-12 09:51:14,532 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 09:51:14,578 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-12 09:51:14,578 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-12 09:51:14,581 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-12 09:51:14,581 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-12 09:51:14,582 INFO L138 SettingsManager]: * Use SBE=true [2020-10-12 09:51:14,582 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-12 09:51:14,583 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-12 09:51:14,583 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-12 09:51:14,583 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-12 09:51:14,583 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-12 09:51:14,583 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-12 09:51:14,584 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-12 09:51:14,584 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-12 09:51:14,584 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-12 09:51:14,584 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-12 09:51:14,584 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-12 09:51:14,584 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-12 09:51:14,585 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-12 09:51:14,585 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-12 09:51:14,586 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-12 09:51:14,587 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-12 09:51:14,587 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-12 09:51:14,587 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-12 09:51:14,588 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-12 09:51:14,588 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-12 09:51:14,588 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-12 09:51:14,588 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-12 09:51:14,588 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-12 09:51:14,588 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-12 09:51:14,589 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 09:51:14,880 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-12 09:51:14,897 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-12 09:51:14,903 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-12 09:51:14,905 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-12 09:51:14,906 INFO L275 PluginConnector]: CDTParser initialized [2020-10-12 09:51:14,906 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-examples/standard_copy7_ground-1.i [2020-10-12 09:51:14,981 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/8ed75515f/f1f3a9650e614884bc0e69071cfa950c/FLAG20e15fccf [2020-10-12 09:51:15,490 INFO L306 CDTParser]: Found 1 translation units. [2020-10-12 09:51:15,490 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/array-examples/standard_copy7_ground-1.i [2020-10-12 09:51:15,498 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/8ed75515f/f1f3a9650e614884bc0e69071cfa950c/FLAG20e15fccf [2020-10-12 09:51:15,838 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/8ed75515f/f1f3a9650e614884bc0e69071cfa950c [2020-10-12 09:51:15,848 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-12 09:51:15,850 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-12 09:51:15,851 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-12 09:51:15,851 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-12 09:51:15,855 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-12 09:51:15,857 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.10 09:51:15" (1/1) ... [2020-10-12 09:51:15,860 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5bc106bb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 09:51:15, skipping insertion in model container [2020-10-12 09:51:15,860 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.10 09:51:15" (1/1) ... [2020-10-12 09:51:15,869 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-12 09:51:15,888 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-12 09:51:16,139 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-12 09:51:16,148 INFO L203 MainTranslator]: Completed pre-run [2020-10-12 09:51:16,215 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-12 09:51:16,246 INFO L208 MainTranslator]: Completed translation [2020-10-12 09:51:16,246 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 09:51:16 WrapperNode [2020-10-12 09:51:16,246 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-12 09:51:16,247 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-12 09:51:16,247 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-12 09:51:16,248 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-12 09:51:16,344 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 09:51:16" (1/1) ... [2020-10-12 09:51:16,344 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 09:51:16" (1/1) ... [2020-10-12 09:51:16,358 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 09:51:16" (1/1) ... [2020-10-12 09:51:16,359 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 09:51:16" (1/1) ... [2020-10-12 09:51:16,371 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 09:51:16" (1/1) ... [2020-10-12 09:51:16,378 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 09:51:16" (1/1) ... [2020-10-12 09:51:16,381 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 09:51:16" (1/1) ... [2020-10-12 09:51:16,384 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-12 09:51:16,385 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-12 09:51:16,385 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-12 09:51:16,385 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-12 09:51:16,386 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 09:51:16" (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 09:51:16,451 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-12 09:51:16,451 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-12 09:51:16,451 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-12 09:51:16,452 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-12 09:51:16,452 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-10-12 09:51:16,452 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-12 09:51:16,452 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-12 09:51:16,452 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-12 09:51:16,452 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-12 09:51:16,453 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-12 09:51:16,453 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-12 09:51:16,453 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-12 09:51:16,453 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-12 09:51:16,453 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-12 09:51:16,814 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-12 09:51:16,815 INFO L295 CfgBuilder]: Removed 9 assume(true) statements. [2020-10-12 09:51:16,821 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.10 09:51:16 BoogieIcfgContainer [2020-10-12 09:51:16,822 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-12 09:51:16,824 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-12 09:51:16,824 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-12 09:51:16,827 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-12 09:51:16,827 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.10 09:51:15" (1/3) ... [2020-10-12 09:51:16,828 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@15575384 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.10 09:51:16, skipping insertion in model container [2020-10-12 09:51:16,829 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 09:51:16" (2/3) ... [2020-10-12 09:51:16,829 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@15575384 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.10 09:51:16, skipping insertion in model container [2020-10-12 09:51:16,829 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.10 09:51:16" (3/3) ... [2020-10-12 09:51:16,831 INFO L109 eAbstractionObserver]: Analyzing ICFG standard_copy7_ground-1.i [2020-10-12 09:51:16,846 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-12 09:51:16,855 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-12 09:51:16,873 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-12 09:51:16,912 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-10-12 09:51:16,923 INFO L376 AbstractCegarLoop]: Hoare is true [2020-10-12 09:51:16,923 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-12 09:51:16,923 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-12 09:51:16,929 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-12 09:51:16,930 INFO L380 AbstractCegarLoop]: Difference is false [2020-10-12 09:51:16,930 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-12 09:51:16,930 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-12 09:51:16,956 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states. [2020-10-12 09:51:16,966 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-12 09:51:16,966 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:51:16,967 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:51:16,968 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:51:16,974 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:51:16,975 INFO L82 PathProgramCache]: Analyzing trace with hash -2029657296, now seen corresponding path program 1 times [2020-10-12 09:51:16,984 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:51:16,984 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [859638588] [2020-10-12 09:51:16,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:51:17,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:51:17,164 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:51:17,251 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:51:17,328 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:51:17,387 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:51:17,405 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:51:17,432 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:51:17,499 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:51:17,686 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:51:19,274 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:51:19,274 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 35 [2020-10-12 09:51:19,275 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-12 09:51:19,275 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2154 [2020-10-12 09:51:19,278 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:51:19,279 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 09:51:19,279 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-12 09:51:19,280 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-12 09:51:19,280 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-10-12 09:51:19,364 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:51:19,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:51:19,370 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:51:19,376 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:51:19,376 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:51:19,377 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:51:19,378 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-12 09:51:19,378 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:51:19,378 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:51:19,379 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:51:19,379 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:51:19,379 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 09:51:19,394 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 09:51:19,396 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [859638588] [2020-10-12 09:51:19,399 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 09:51:19,399 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-12 09:51:19,400 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [621192640] [2020-10-12 09:51:19,407 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-12 09:51:19,408 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:51:19,423 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-12 09:51:19,425 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-12 09:51:19,427 INFO L87 Difference]: Start difference. First operand 45 states. Second operand 4 states. [2020-10-12 09:51:19,652 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:51:19,653 INFO L93 Difference]: Finished difference Result 96 states and 145 transitions. [2020-10-12 09:51:19,654 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-12 09:51:19,655 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 27 [2020-10-12 09:51:19,656 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:51:19,667 INFO L225 Difference]: With dead ends: 96 [2020-10-12 09:51:19,668 INFO L226 Difference]: Without dead ends: 54 [2020-10-12 09:51:19,671 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 09:51:19,692 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-10-12 09:51:19,715 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 47. [2020-10-12 09:51:19,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2020-10-12 09:51:19,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 55 transitions. [2020-10-12 09:51:19,721 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 55 transitions. Word has length 27 [2020-10-12 09:51:19,721 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:51:19,721 INFO L479 AbstractCegarLoop]: Abstraction has 47 states and 55 transitions. [2020-10-12 09:51:19,721 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-12 09:51:19,722 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 55 transitions. [2020-10-12 09:51:19,723 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-10-12 09:51:19,723 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:51:19,723 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:51:19,724 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-12 09:51:19,724 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:51:19,725 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:51:19,725 INFO L82 PathProgramCache]: Analyzing trace with hash -864373520, now seen corresponding path program 1 times [2020-10-12 09:51:19,725 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:51:19,725 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1770541991] [2020-10-12 09:51:19,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:51:19,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:51:19,756 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:51:19,782 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:51:19,801 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:51:19,814 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:51:19,827 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:51:19,838 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:51:20,145 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:51:21,842 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:51:24,766 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:51:24,767 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 49 [2020-10-12 09:51:24,767 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-12 09:51:24,767 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5017 [2020-10-12 09:51:24,768 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:51:24,772 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-12 09:51:24,773 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-12 09:51:24,773 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 4 [2020-10-12 09:51:24,773 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 5 [2020-10-12 09:51:24,826 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:51:24,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:51:24,829 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:51:24,833 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:51:24,833 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:51:24,834 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:51:24,836 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-12 09:51:24,836 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:51:24,837 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:51:24,837 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:51:24,837 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:51:24,837 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 09:51:24,842 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-10-12 09:51:24,842 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1770541991] [2020-10-12 09:51:24,843 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:51:24,843 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-12 09:51:24,843 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [854353414] [2020-10-12 09:51:24,845 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-12 09:51:24,846 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:51:24,846 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-12 09:51:24,846 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-12 09:51:24,846 INFO L87 Difference]: Start difference. First operand 47 states and 55 transitions. Second operand 5 states. [2020-10-12 09:51:25,056 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:51:25,056 INFO L93 Difference]: Finished difference Result 103 states and 124 transitions. [2020-10-12 09:51:25,057 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-12 09:51:25,057 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 41 [2020-10-12 09:51:25,058 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:51:25,059 INFO L225 Difference]: With dead ends: 103 [2020-10-12 09:51:25,059 INFO L226 Difference]: Without dead ends: 68 [2020-10-12 09:51:25,061 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-12 09:51:25,061 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2020-10-12 09:51:25,070 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 61. [2020-10-12 09:51:25,070 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2020-10-12 09:51:25,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 69 transitions. [2020-10-12 09:51:25,072 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 69 transitions. Word has length 41 [2020-10-12 09:51:25,072 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:51:25,072 INFO L479 AbstractCegarLoop]: Abstraction has 61 states and 69 transitions. [2020-10-12 09:51:25,073 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-12 09:51:25,073 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 69 transitions. [2020-10-12 09:51:25,075 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-10-12 09:51:25,075 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:51:25,075 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:51:25,076 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-12 09:51:25,076 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:51:25,076 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:51:25,076 INFO L82 PathProgramCache]: Analyzing trace with hash 1301663170, now seen corresponding path program 2 times [2020-10-12 09:51:25,077 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:51:25,077 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1851699310] [2020-10-12 09:51:25,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:51:25,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:51:25,094 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:51:25,111 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:51:25,138 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:51:25,162 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:51:25,181 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:51:25,258 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:51:30,103 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:51:30,104 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 63 [2020-10-12 09:51:30,104 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-12 09:51:30,104 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5014 [2020-10-12 09:51:30,104 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:51:30,105 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-12 09:51:30,105 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 25 [2020-10-12 09:51:30,105 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-12 09:51:30,105 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:51:30,150 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:51:30,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:51:30,155 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:51:30,157 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:51:30,157 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:51:30,157 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:51:30,157 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-12 09:51:30,158 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:51:30,159 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:51:30,159 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:51:30,160 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:51:30,160 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-12 09:51:30,168 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2020-10-12 09:51:30,168 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1851699310] [2020-10-12 09:51:30,169 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:51:30,169 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-12 09:51:30,169 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [603509800] [2020-10-12 09:51:30,171 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-12 09:51:30,172 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:51:30,172 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-12 09:51:30,172 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-12 09:51:30,173 INFO L87 Difference]: Start difference. First operand 61 states and 69 transitions. Second operand 6 states. [2020-10-12 09:51:30,428 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:51:30,428 INFO L93 Difference]: Finished difference Result 129 states and 150 transitions. [2020-10-12 09:51:30,429 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-12 09:51:30,429 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 55 [2020-10-12 09:51:30,429 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:51:30,431 INFO L225 Difference]: With dead ends: 129 [2020-10-12 09:51:30,431 INFO L226 Difference]: Without dead ends: 82 [2020-10-12 09:51:30,432 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-12 09:51:30,432 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2020-10-12 09:51:30,442 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 75. [2020-10-12 09:51:30,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2020-10-12 09:51:30,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 83 transitions. [2020-10-12 09:51:30,444 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 83 transitions. Word has length 55 [2020-10-12 09:51:30,445 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:51:30,445 INFO L479 AbstractCegarLoop]: Abstraction has 75 states and 83 transitions. [2020-10-12 09:51:30,445 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-12 09:51:30,445 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 83 transitions. [2020-10-12 09:51:30,447 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2020-10-12 09:51:30,447 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:51:30,448 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:51:30,448 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-12 09:51:30,448 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:51:30,448 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:51:30,449 INFO L82 PathProgramCache]: Analyzing trace with hash 1157140244, now seen corresponding path program 3 times [2020-10-12 09:51:30,449 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:51:30,449 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [351323983] [2020-10-12 09:51:30,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:51:30,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:51:30,467 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:51:30,478 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:51:30,496 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:51:30,514 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:51:30,534 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:51:30,629 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:51:35,470 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:51:35,471 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 77 [2020-10-12 09:51:35,471 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-12 09:51:35,472 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5008 [2020-10-12 09:51:35,472 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:51:35,472 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-12 09:51:35,472 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 29 [2020-10-12 09:51:35,472 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-12 09:51:35,473 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:51:35,534 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:51:35,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:51:35,536 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:51:35,538 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:51:35,538 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:51:35,538 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:51:35,538 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 09:51:35,539 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:51:35,539 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:51:35,539 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:51:35,539 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:51:35,540 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:51:35,544 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2020-10-12 09:51:35,545 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [351323983] [2020-10-12 09:51:35,545 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:51:35,546 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-12 09:51:35,546 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [953270330] [2020-10-12 09:51:35,546 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-12 09:51:35,547 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:51:35,547 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-12 09:51:35,547 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-10-12 09:51:35,547 INFO L87 Difference]: Start difference. First operand 75 states and 83 transitions. Second operand 7 states. [2020-10-12 09:51:35,819 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:51:35,819 INFO L93 Difference]: Finished difference Result 155 states and 176 transitions. [2020-10-12 09:51:35,820 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-12 09:51:35,820 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 69 [2020-10-12 09:51:35,820 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:51:35,821 INFO L225 Difference]: With dead ends: 155 [2020-10-12 09:51:35,822 INFO L226 Difference]: Without dead ends: 96 [2020-10-12 09:51:35,823 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-10-12 09:51:35,823 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2020-10-12 09:51:35,831 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 89. [2020-10-12 09:51:35,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2020-10-12 09:51:35,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 97 transitions. [2020-10-12 09:51:35,832 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 97 transitions. Word has length 69 [2020-10-12 09:51:35,833 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:51:35,833 INFO L479 AbstractCegarLoop]: Abstraction has 89 states and 97 transitions. [2020-10-12 09:51:35,833 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-12 09:51:35,833 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 97 transitions. [2020-10-12 09:51:35,834 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2020-10-12 09:51:35,834 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:51:35,835 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:51:35,835 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-12 09:51:35,835 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:51:35,835 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:51:35,836 INFO L82 PathProgramCache]: Analyzing trace with hash 81926374, now seen corresponding path program 4 times [2020-10-12 09:51:35,836 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:51:35,836 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [813040639] [2020-10-12 09:51:35,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:51:35,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:51:35,851 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:51:35,864 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:51:35,890 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:51:35,911 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:51:35,933 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:51:37,192 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:51:40,886 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:51:40,887 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 91 [2020-10-12 09:51:40,888 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-12 09:51:40,888 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5039 [2020-10-12 09:51:40,889 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:51:40,889 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-12 09:51:40,890 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 33 [2020-10-12 09:51:40,890 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-12 09:51:40,891 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-12 09:51:41,021 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:51:41,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:51:41,025 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:51:41,027 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:51:41,027 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:51:41,028 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:51:41,028 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 09:51:41,028 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:51:41,029 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:51:41,029 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:51:41,029 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:51:41,030 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 09:51:41,042 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 96 trivial. 0 not checked. [2020-10-12 09:51:41,043 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [813040639] [2020-10-12 09:51:41,044 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:51:41,044 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-12 09:51:41,044 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [725478557] [2020-10-12 09:51:41,047 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-12 09:51:41,047 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:51:41,048 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-12 09:51:41,049 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-10-12 09:51:41,049 INFO L87 Difference]: Start difference. First operand 89 states and 97 transitions. Second operand 8 states. [2020-10-12 09:51:41,409 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:51:41,410 INFO L93 Difference]: Finished difference Result 181 states and 202 transitions. [2020-10-12 09:51:41,410 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-12 09:51:41,410 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 83 [2020-10-12 09:51:41,411 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:51:41,412 INFO L225 Difference]: With dead ends: 181 [2020-10-12 09:51:41,412 INFO L226 Difference]: Without dead ends: 110 [2020-10-12 09:51:41,413 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-10-12 09:51:41,413 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2020-10-12 09:51:41,427 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 103. [2020-10-12 09:51:41,427 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 103 states. [2020-10-12 09:51:41,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 111 transitions. [2020-10-12 09:51:41,429 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 111 transitions. Word has length 83 [2020-10-12 09:51:41,430 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:51:41,431 INFO L479 AbstractCegarLoop]: Abstraction has 103 states and 111 transitions. [2020-10-12 09:51:41,431 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-12 09:51:41,431 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 111 transitions. [2020-10-12 09:51:41,436 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2020-10-12 09:51:41,436 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:51:41,437 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:51:41,441 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-12 09:51:41,442 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:51:41,442 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:51:41,442 INFO L82 PathProgramCache]: Analyzing trace with hash -2036757704, now seen corresponding path program 5 times [2020-10-12 09:51:41,442 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:51:41,443 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1150553301] [2020-10-12 09:51:41,443 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:51:41,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:51:41,465 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:51:41,475 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:51:41,497 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:51:41,516 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:51:41,538 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:51:42,815 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:51:46,468 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:51:46,468 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 105 [2020-10-12 09:51:46,468 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-12 09:51:46,469 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5007 [2020-10-12 09:51:46,469 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:51:46,469 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-12 09:51:46,469 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-12 09:51:46,470 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-12 09:51:46,471 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 09:51:46,547 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:51:46,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:51:46,549 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:51:46,550 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:51:46,550 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:51:46,551 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:51:46,551 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 09:51:46,551 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:51:46,552 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:51:46,552 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:51:46,552 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:51:46,552 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:51:46,564 INFO L134 CoverageAnalysis]: Checked inductivity of 175 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 150 trivial. 0 not checked. [2020-10-12 09:51:46,565 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1150553301] [2020-10-12 09:51:46,566 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:51:46,566 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-12 09:51:46,566 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1475228007] [2020-10-12 09:51:46,567 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-12 09:51:46,567 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:51:46,567 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-12 09:51:46,568 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-10-12 09:51:46,568 INFO L87 Difference]: Start difference. First operand 103 states and 111 transitions. Second operand 9 states. [2020-10-12 09:51:46,879 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:51:46,879 INFO L93 Difference]: Finished difference Result 207 states and 228 transitions. [2020-10-12 09:51:46,879 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-12 09:51:46,880 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 97 [2020-10-12 09:51:46,880 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:51:46,881 INFO L225 Difference]: With dead ends: 207 [2020-10-12 09:51:46,881 INFO L226 Difference]: Without dead ends: 124 [2020-10-12 09:51:46,882 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-10-12 09:51:46,883 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2020-10-12 09:51:46,890 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 117. [2020-10-12 09:51:46,891 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 117 states. [2020-10-12 09:51:46,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 125 transitions. [2020-10-12 09:51:46,892 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 125 transitions. Word has length 97 [2020-10-12 09:51:46,892 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:51:46,893 INFO L479 AbstractCegarLoop]: Abstraction has 117 states and 125 transitions. [2020-10-12 09:51:46,893 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-12 09:51:46,893 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 125 transitions. [2020-10-12 09:51:46,894 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2020-10-12 09:51:46,894 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:51:46,894 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:51:46,895 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-12 09:51:46,895 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:51:46,895 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:51:46,895 INFO L82 PathProgramCache]: Analyzing trace with hash 2087585290, now seen corresponding path program 6 times [2020-10-12 09:51:46,895 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:51:46,896 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1741992822] [2020-10-12 09:51:46,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:51:46,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:51:46,910 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:51:46,922 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:51:46,950 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:51:46,977 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:51:47,003 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:51:50,423 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:51:51,927 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:51:51,928 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 119 [2020-10-12 09:51:51,928 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-12 09:51:51,928 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5020 [2020-10-12 09:51:51,928 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:51:51,928 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-12 09:51:51,929 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 55 [2020-10-12 09:51:51,929 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-12 09:51:51,929 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:51:52,007 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:51:52,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:51:52,009 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:51:52,010 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:51:52,011 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:51:52,011 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:51:52,011 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 09:51:52,011 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:51:52,011 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:51:52,012 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:51:52,012 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:51:52,012 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:51:52,021 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 216 trivial. 0 not checked. [2020-10-12 09:51:52,022 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1741992822] [2020-10-12 09:51:52,022 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:51:52,022 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-12 09:51:52,023 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1678789175] [2020-10-12 09:51:52,023 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-12 09:51:52,023 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:51:52,023 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-12 09:51:52,024 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2020-10-12 09:51:52,024 INFO L87 Difference]: Start difference. First operand 117 states and 125 transitions. Second operand 10 states. [2020-10-12 09:51:52,367 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:51:52,368 INFO L93 Difference]: Finished difference Result 233 states and 254 transitions. [2020-10-12 09:51:52,368 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-12 09:51:52,368 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 111 [2020-10-12 09:51:52,369 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:51:52,370 INFO L225 Difference]: With dead ends: 233 [2020-10-12 09:51:52,370 INFO L226 Difference]: Without dead ends: 138 [2020-10-12 09:51:52,371 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2020-10-12 09:51:52,375 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2020-10-12 09:51:52,393 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 131. [2020-10-12 09:51:52,393 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 131 states. [2020-10-12 09:51:52,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 139 transitions. [2020-10-12 09:51:52,395 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 139 transitions. Word has length 111 [2020-10-12 09:51:52,395 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:51:52,395 INFO L479 AbstractCegarLoop]: Abstraction has 131 states and 139 transitions. [2020-10-12 09:51:52,396 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-12 09:51:52,396 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 139 transitions. [2020-10-12 09:51:52,401 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2020-10-12 09:51:52,401 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:51:52,402 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:51:52,402 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-12 09:51:52,402 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:51:52,402 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:51:52,403 INFO L82 PathProgramCache]: Analyzing trace with hash -474568356, now seen corresponding path program 7 times [2020-10-12 09:51:52,403 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:51:52,403 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [794491638] [2020-10-12 09:51:52,403 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:51:52,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:51:52,421 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:51:52,433 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:51:52,459 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:51:52,485 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:51:52,511 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:51:56,512 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:51:57,444 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:51:57,444 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 133 [2020-10-12 09:51:57,444 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-12 09:51:57,444 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5026 [2020-10-12 09:51:57,445 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:51:57,445 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-12 09:51:57,445 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 45 [2020-10-12 09:51:57,445 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-12 09:51:57,445 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:51:57,567 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:51:57,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:51:57,569 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:51:57,570 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:51:57,570 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:51:57,570 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:51:57,570 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 09:51:57,571 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:51:57,571 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:51:57,571 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:51:57,572 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:51:57,572 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 09:51:57,599 INFO L134 CoverageAnalysis]: Checked inductivity of 343 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 294 trivial. 0 not checked. [2020-10-12 09:51:57,600 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [794491638] [2020-10-12 09:51:57,600 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:51:57,600 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-12 09:51:57,602 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1392410508] [2020-10-12 09:51:57,602 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-12 09:51:57,603 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:51:57,603 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-12 09:51:57,603 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2020-10-12 09:51:57,604 INFO L87 Difference]: Start difference. First operand 131 states and 139 transitions. Second operand 11 states. [2020-10-12 09:51:58,094 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:51:58,094 INFO L93 Difference]: Finished difference Result 259 states and 280 transitions. [2020-10-12 09:51:58,095 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-12 09:51:58,095 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 125 [2020-10-12 09:51:58,095 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:51:58,096 INFO L225 Difference]: With dead ends: 259 [2020-10-12 09:51:58,096 INFO L226 Difference]: Without dead ends: 152 [2020-10-12 09:51:58,097 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2020-10-12 09:51:58,098 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2020-10-12 09:51:58,112 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 145. [2020-10-12 09:51:58,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 145 states. [2020-10-12 09:51:58,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 153 transitions. [2020-10-12 09:51:58,116 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 153 transitions. Word has length 125 [2020-10-12 09:51:58,116 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:51:58,116 INFO L479 AbstractCegarLoop]: Abstraction has 145 states and 153 transitions. [2020-10-12 09:51:58,117 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-12 09:51:58,117 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 153 transitions. [2020-10-12 09:51:58,121 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2020-10-12 09:51:58,122 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:51:58,122 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:51:58,122 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-12 09:51:58,123 INFO L427 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:51:58,125 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:51:58,125 INFO L82 PathProgramCache]: Analyzing trace with hash 382899502, now seen corresponding path program 8 times [2020-10-12 09:51:58,125 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:51:58,126 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [149130422] [2020-10-12 09:51:58,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:51:58,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:51:58,151 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:51:58,173 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:51:58,220 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:51:58,254 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:51:58,285 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:52:03,175 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:52:03,175 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 147 [2020-10-12 09:52:03,175 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-12 09:52:03,176 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5030 [2020-10-12 09:52:03,176 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:52:03,176 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-12 09:52:03,176 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 67 [2020-10-12 09:52:03,176 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-12 09:52:03,176 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:52:03,308 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:52:03,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:52:03,310 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:52:03,311 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:52:03,312 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:52:03,312 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:52:03,312 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 09:52:03,313 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:52:03,313 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:52:03,313 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:52:03,314 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:52:03,314 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 09:52:03,336 INFO L134 CoverageAnalysis]: Checked inductivity of 448 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 384 trivial. 0 not checked. [2020-10-12 09:52:03,342 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [149130422] [2020-10-12 09:52:03,343 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:52:03,343 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-12 09:52:03,344 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1170457531] [2020-10-12 09:52:03,344 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-12 09:52:03,344 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:52:03,345 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-12 09:52:03,345 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2020-10-12 09:52:03,345 INFO L87 Difference]: Start difference. First operand 145 states and 153 transitions. Second operand 12 states. [2020-10-12 09:52:03,770 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:52:03,771 INFO L93 Difference]: Finished difference Result 285 states and 306 transitions. [2020-10-12 09:52:03,771 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-12 09:52:03,771 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 139 [2020-10-12 09:52:03,772 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:52:03,773 INFO L225 Difference]: With dead ends: 285 [2020-10-12 09:52:03,775 INFO L226 Difference]: Without dead ends: 166 [2020-10-12 09:52:03,776 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2020-10-12 09:52:03,777 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2020-10-12 09:52:03,788 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 159. [2020-10-12 09:52:03,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 159 states. [2020-10-12 09:52:03,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 167 transitions. [2020-10-12 09:52:03,789 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 167 transitions. Word has length 139 [2020-10-12 09:52:03,789 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:52:03,790 INFO L479 AbstractCegarLoop]: Abstraction has 159 states and 167 transitions. [2020-10-12 09:52:03,790 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-12 09:52:03,790 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 167 transitions. [2020-10-12 09:52:03,791 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 154 [2020-10-12 09:52:03,792 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:52:03,792 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:52:03,792 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-12 09:52:03,792 INFO L427 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:52:03,793 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:52:03,793 INFO L82 PathProgramCache]: Analyzing trace with hash 1596516736, now seen corresponding path program 9 times [2020-10-12 09:52:03,793 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:52:03,793 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [984201065] [2020-10-12 09:52:03,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:52:03,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:52:03,810 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:52:03,829 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:52:03,867 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:52:03,892 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:52:03,922 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:52:08,809 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:52:08,810 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 161 [2020-10-12 09:52:08,810 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-12 09:52:08,810 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-12 09:52:08,810 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:52:08,810 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-12 09:52:08,811 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-12 09:52:08,811 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-12 09:52:08,811 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:52:08,935 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:52:08,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:52:08,936 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:52:08,937 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:52:08,937 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:52:08,937 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:52:08,937 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 09:52:08,937 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:52:08,938 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:52:08,938 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:52:08,938 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:52:08,938 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:52:08,957 INFO L134 CoverageAnalysis]: Checked inductivity of 567 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 486 trivial. 0 not checked. [2020-10-12 09:52:08,958 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [984201065] [2020-10-12 09:52:08,958 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:52:08,958 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-12 09:52:08,958 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [501757195] [2020-10-12 09:52:08,959 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-12 09:52:08,959 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:52:08,959 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-12 09:52:08,959 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2020-10-12 09:52:08,960 INFO L87 Difference]: Start difference. First operand 159 states and 167 transitions. Second operand 13 states. [2020-10-12 09:52:09,425 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:52:09,425 INFO L93 Difference]: Finished difference Result 311 states and 332 transitions. [2020-10-12 09:52:09,426 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-12 09:52:09,426 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 153 [2020-10-12 09:52:09,426 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:52:09,427 INFO L225 Difference]: With dead ends: 311 [2020-10-12 09:52:09,427 INFO L226 Difference]: Without dead ends: 180 [2020-10-12 09:52:09,428 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2020-10-12 09:52:09,429 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 180 states. [2020-10-12 09:52:09,434 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 180 to 173. [2020-10-12 09:52:09,434 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 173 states. [2020-10-12 09:52:09,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173 states to 173 states and 181 transitions. [2020-10-12 09:52:09,435 INFO L78 Accepts]: Start accepts. Automaton has 173 states and 181 transitions. Word has length 153 [2020-10-12 09:52:09,435 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:52:09,436 INFO L479 AbstractCegarLoop]: Abstraction has 173 states and 181 transitions. [2020-10-12 09:52:09,436 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-12 09:52:09,436 INFO L276 IsEmpty]: Start isEmpty. Operand 173 states and 181 transitions. [2020-10-12 09:52:09,437 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 168 [2020-10-12 09:52:09,438 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:52:09,438 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:52:09,438 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-12 09:52:09,438 INFO L427 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:52:09,439 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:52:09,439 INFO L82 PathProgramCache]: Analyzing trace with hash 120112722, now seen corresponding path program 10 times [2020-10-12 09:52:09,439 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:52:09,439 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [59503760] [2020-10-12 09:52:09,439 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:52:09,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:52:09,454 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:52:09,471 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:52:09,506 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:52:09,544 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:52:09,572 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:52:14,523 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:52:14,523 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 175 [2020-10-12 09:52:14,523 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-12 09:52:14,523 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5072 [2020-10-12 09:52:14,523 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:52:14,524 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-12 09:52:14,524 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 35 [2020-10-12 09:52:14,524 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-12 09:52:14,524 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:52:14,651 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:52:14,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:52:14,653 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:52:14,654 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:52:14,655 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:52:14,655 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:52:14,655 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 09:52:14,655 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:52:14,655 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:52:14,655 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:52:14,655 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:52:14,655 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:52:14,669 INFO L134 CoverageAnalysis]: Checked inductivity of 700 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 600 trivial. 0 not checked. [2020-10-12 09:52:14,669 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [59503760] [2020-10-12 09:52:14,669 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:52:14,669 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-12 09:52:14,669 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1278981064] [2020-10-12 09:52:14,670 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-12 09:52:14,670 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:52:14,670 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-12 09:52:14,671 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2020-10-12 09:52:14,671 INFO L87 Difference]: Start difference. First operand 173 states and 181 transitions. Second operand 14 states. [2020-10-12 09:52:15,181 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:52:15,181 INFO L93 Difference]: Finished difference Result 337 states and 358 transitions. [2020-10-12 09:52:15,182 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-12 09:52:15,182 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 167 [2020-10-12 09:52:15,182 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:52:15,184 INFO L225 Difference]: With dead ends: 337 [2020-10-12 09:52:15,184 INFO L226 Difference]: Without dead ends: 194 [2020-10-12 09:52:15,185 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2020-10-12 09:52:15,186 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 194 states. [2020-10-12 09:52:15,192 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 194 to 187. [2020-10-12 09:52:15,192 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 187 states. [2020-10-12 09:52:15,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 187 states to 187 states and 195 transitions. [2020-10-12 09:52:15,193 INFO L78 Accepts]: Start accepts. Automaton has 187 states and 195 transitions. Word has length 167 [2020-10-12 09:52:15,194 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:52:15,194 INFO L479 AbstractCegarLoop]: Abstraction has 187 states and 195 transitions. [2020-10-12 09:52:15,194 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-12 09:52:15,194 INFO L276 IsEmpty]: Start isEmpty. Operand 187 states and 195 transitions. [2020-10-12 09:52:15,196 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 182 [2020-10-12 09:52:15,196 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:52:15,196 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:52:15,196 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-12 09:52:15,196 INFO L427 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:52:15,197 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:52:15,197 INFO L82 PathProgramCache]: Analyzing trace with hash -330740828, now seen corresponding path program 11 times [2020-10-12 09:52:15,197 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:52:15,197 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [675001855] [2020-10-12 09:52:15,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:52:15,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:52:15,212 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:52:15,225 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:52:15,253 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:52:15,287 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:52:15,308 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:52:20,289 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:52:20,290 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 189 [2020-10-12 09:52:20,290 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-12 09:52:20,290 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5081 [2020-10-12 09:52:20,290 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:52:20,290 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-12 09:52:20,290 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 61 [2020-10-12 09:52:20,290 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-10-12 09:52:20,290 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:52:20,447 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:52:20,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:52:20,449 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:52:20,450 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:52:20,450 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:52:20,450 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:52:20,450 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 09:52:20,450 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:52:20,451 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:52:20,451 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:52:20,451 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:52:20,451 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:52:20,465 INFO L134 CoverageAnalysis]: Checked inductivity of 847 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 726 trivial. 0 not checked. [2020-10-12 09:52:20,465 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [675001855] [2020-10-12 09:52:20,465 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:52:20,466 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-12 09:52:20,466 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1597492878] [2020-10-12 09:52:20,466 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-12 09:52:20,467 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:52:20,467 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-12 09:52:20,467 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210 [2020-10-12 09:52:20,467 INFO L87 Difference]: Start difference. First operand 187 states and 195 transitions. Second operand 15 states. [2020-10-12 09:52:21,033 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:52:21,034 INFO L93 Difference]: Finished difference Result 363 states and 384 transitions. [2020-10-12 09:52:21,039 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-12 09:52:21,039 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 181 [2020-10-12 09:52:21,040 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:52:21,043 INFO L225 Difference]: With dead ends: 363 [2020-10-12 09:52:21,043 INFO L226 Difference]: Without dead ends: 208 [2020-10-12 09:52:21,044 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210 [2020-10-12 09:52:21,045 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 208 states. [2020-10-12 09:52:21,051 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 208 to 201. [2020-10-12 09:52:21,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 201 states. [2020-10-12 09:52:21,052 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 201 states to 201 states and 209 transitions. [2020-10-12 09:52:21,052 INFO L78 Accepts]: Start accepts. Automaton has 201 states and 209 transitions. Word has length 181 [2020-10-12 09:52:21,052 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:52:21,053 INFO L479 AbstractCegarLoop]: Abstraction has 201 states and 209 transitions. [2020-10-12 09:52:21,053 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-12 09:52:21,053 INFO L276 IsEmpty]: Start isEmpty. Operand 201 states and 209 transitions. [2020-10-12 09:52:21,055 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 196 [2020-10-12 09:52:21,055 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:52:21,055 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:52:21,056 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-12 09:52:21,056 INFO L427 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:52:21,056 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:52:21,056 INFO L82 PathProgramCache]: Analyzing trace with hash -1861641866, now seen corresponding path program 12 times [2020-10-12 09:52:21,056 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:52:21,057 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [16656579] [2020-10-12 09:52:21,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:52:21,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:52:21,072 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:52:21,091 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:52:21,130 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:52:21,164 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:52:21,187 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:52:26,107 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:52:26,107 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 203 [2020-10-12 09:52:26,107 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-12 09:52:26,107 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5038 [2020-10-12 09:52:26,107 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:52:26,107 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-12 09:52:26,108 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 91 [2020-10-12 09:52:26,108 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-12 09:52:26,108 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:52:26,276 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:52:26,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:52:26,278 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:52:26,279 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:52:26,279 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:52:26,279 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:52:26,280 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 09:52:26,280 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:52:26,280 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:52:26,280 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:52:26,280 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:52:26,280 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:52:26,295 INFO L134 CoverageAnalysis]: Checked inductivity of 1008 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 864 trivial. 0 not checked. [2020-10-12 09:52:26,296 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [16656579] [2020-10-12 09:52:26,296 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:52:26,296 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-12 09:52:26,296 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1436931340] [2020-10-12 09:52:26,297 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-12 09:52:26,297 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:52:26,297 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-12 09:52:26,297 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=133, Unknown=0, NotChecked=0, Total=240 [2020-10-12 09:52:26,298 INFO L87 Difference]: Start difference. First operand 201 states and 209 transitions. Second operand 16 states. [2020-10-12 09:52:26,875 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:52:26,875 INFO L93 Difference]: Finished difference Result 389 states and 410 transitions. [2020-10-12 09:52:26,875 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-12 09:52:26,876 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 195 [2020-10-12 09:52:26,876 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:52:26,877 INFO L225 Difference]: With dead ends: 389 [2020-10-12 09:52:26,878 INFO L226 Difference]: Without dead ends: 222 [2020-10-12 09:52:26,878 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=107, Invalid=133, Unknown=0, NotChecked=0, Total=240 [2020-10-12 09:52:26,879 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 222 states. [2020-10-12 09:52:26,886 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 222 to 215. [2020-10-12 09:52:26,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 215 states. [2020-10-12 09:52:26,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 215 states to 215 states and 223 transitions. [2020-10-12 09:52:26,887 INFO L78 Accepts]: Start accepts. Automaton has 215 states and 223 transitions. Word has length 195 [2020-10-12 09:52:26,888 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:52:26,888 INFO L479 AbstractCegarLoop]: Abstraction has 215 states and 223 transitions. [2020-10-12 09:52:26,888 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-12 09:52:26,888 INFO L276 IsEmpty]: Start isEmpty. Operand 215 states and 223 transitions. [2020-10-12 09:52:26,889 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 210 [2020-10-12 09:52:26,889 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:52:26,890 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:52:26,890 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-12 09:52:26,890 INFO L427 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:52:26,890 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:52:26,890 INFO L82 PathProgramCache]: Analyzing trace with hash -1359949880, now seen corresponding path program 13 times [2020-10-12 09:52:26,891 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:52:26,891 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [548268999] [2020-10-12 09:52:26,891 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:52:26,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:52:26,906 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:52:26,924 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:52:26,962 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:52:27,004 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:52:27,033 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:52:31,906 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:52:31,907 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 217 [2020-10-12 09:52:31,907 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-12 09:52:31,907 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-12 09:52:31,907 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:52:31,907 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-12 09:52:31,907 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 97 [2020-10-12 09:52:31,907 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-10-12 09:52:31,908 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:52:32,087 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:52:32,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:52:32,089 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:52:32,090 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:52:32,090 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:52:32,090 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:52:32,090 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 09:52:32,090 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:52:32,090 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:52:32,091 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:52:32,091 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:52:32,091 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:52:32,109 INFO L134 CoverageAnalysis]: Checked inductivity of 1183 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 1014 trivial. 0 not checked. [2020-10-12 09:52:32,110 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [548268999] [2020-10-12 09:52:32,110 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:52:32,110 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-12 09:52:32,110 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1634084809] [2020-10-12 09:52:32,111 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-12 09:52:32,111 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:52:32,111 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-12 09:52:32,111 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=150, Unknown=0, NotChecked=0, Total=272 [2020-10-12 09:52:32,112 INFO L87 Difference]: Start difference. First operand 215 states and 223 transitions. Second operand 17 states. [2020-10-12 09:52:32,664 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:52:32,664 INFO L93 Difference]: Finished difference Result 415 states and 436 transitions. [2020-10-12 09:52:32,665 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-12 09:52:32,665 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 209 [2020-10-12 09:52:32,666 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:52:32,667 INFO L225 Difference]: With dead ends: 415 [2020-10-12 09:52:32,668 INFO L226 Difference]: Without dead ends: 236 [2020-10-12 09:52:32,669 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=122, Invalid=150, Unknown=0, NotChecked=0, Total=272 [2020-10-12 09:52:32,670 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 236 states. [2020-10-12 09:52:32,676 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 236 to 229. [2020-10-12 09:52:32,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 229 states. [2020-10-12 09:52:32,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 229 states to 229 states and 237 transitions. [2020-10-12 09:52:32,678 INFO L78 Accepts]: Start accepts. Automaton has 229 states and 237 transitions. Word has length 209 [2020-10-12 09:52:32,679 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:52:32,679 INFO L479 AbstractCegarLoop]: Abstraction has 229 states and 237 transitions. [2020-10-12 09:52:32,679 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-12 09:52:32,679 INFO L276 IsEmpty]: Start isEmpty. Operand 229 states and 237 transitions. [2020-10-12 09:52:32,680 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 224 [2020-10-12 09:52:32,680 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:52:32,681 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:52:32,681 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-12 09:52:32,681 INFO L427 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:52:32,681 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:52:32,681 INFO L82 PathProgramCache]: Analyzing trace with hash 1217269402, now seen corresponding path program 14 times [2020-10-12 09:52:32,682 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:52:32,682 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1994540252] [2020-10-12 09:52:32,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:52:32,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:52:32,698 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:52:32,712 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:52:32,737 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:52:32,766 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:52:32,796 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:52:37,866 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:52:37,867 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 231 [2020-10-12 09:52:37,867 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-12 09:52:37,867 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5172 [2020-10-12 09:52:37,867 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:52:37,867 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-12 09:52:37,867 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 43 [2020-10-12 09:52:37,868 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-12 09:52:37,868 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:52:38,071 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:52:38,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:52:38,074 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:52:38,075 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:52:38,075 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:52:38,075 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:52:38,075 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 09:52:38,075 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:52:38,075 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:52:38,076 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:52:38,076 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:52:38,076 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:52:38,095 INFO L134 CoverageAnalysis]: Checked inductivity of 1372 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 1176 trivial. 0 not checked. [2020-10-12 09:52:38,095 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1994540252] [2020-10-12 09:52:38,096 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:52:38,096 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-12 09:52:38,096 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [408812125] [2020-10-12 09:52:38,096 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-12 09:52:38,096 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:52:38,097 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-12 09:52:38,097 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2020-10-12 09:52:38,097 INFO L87 Difference]: Start difference. First operand 229 states and 237 transitions. Second operand 18 states. [2020-10-12 09:52:38,752 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:52:38,752 INFO L93 Difference]: Finished difference Result 441 states and 462 transitions. [2020-10-12 09:52:38,753 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-12 09:52:38,753 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 223 [2020-10-12 09:52:38,753 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:52:38,756 INFO L225 Difference]: With dead ends: 441 [2020-10-12 09:52:38,756 INFO L226 Difference]: Without dead ends: 250 [2020-10-12 09:52:38,757 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2020-10-12 09:52:38,757 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 250 states. [2020-10-12 09:52:38,764 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 250 to 243. [2020-10-12 09:52:38,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 243 states. [2020-10-12 09:52:38,766 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 243 states to 243 states and 251 transitions. [2020-10-12 09:52:38,766 INFO L78 Accepts]: Start accepts. Automaton has 243 states and 251 transitions. Word has length 223 [2020-10-12 09:52:38,767 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:52:38,767 INFO L479 AbstractCegarLoop]: Abstraction has 243 states and 251 transitions. [2020-10-12 09:52:38,767 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-12 09:52:38,767 INFO L276 IsEmpty]: Start isEmpty. Operand 243 states and 251 transitions. [2020-10-12 09:52:38,768 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 238 [2020-10-12 09:52:38,768 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:52:38,769 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:52:38,769 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-12 09:52:38,769 INFO L427 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:52:38,769 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:52:38,769 INFO L82 PathProgramCache]: Analyzing trace with hash 997750252, now seen corresponding path program 15 times [2020-10-12 09:52:38,770 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:52:38,770 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1248167292] [2020-10-12 09:52:38,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:52:38,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:52:38,787 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:52:38,808 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:52:38,838 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:52:38,875 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:52:38,909 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:52:43,903 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:52:43,904 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 245 [2020-10-12 09:52:43,904 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-12 09:52:43,904 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5120 [2020-10-12 09:52:43,904 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:52:43,904 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-12 09:52:43,904 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 77 [2020-10-12 09:52:43,904 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-12 09:52:43,905 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:52:44,149 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:52:44,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:52:44,151 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:52:44,152 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:52:44,152 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:52:44,152 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:52:44,153 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 09:52:44,153 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:52:44,153 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:52:44,153 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:52:44,153 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:52:44,153 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:52:44,174 INFO L134 CoverageAnalysis]: Checked inductivity of 1575 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 1350 trivial. 0 not checked. [2020-10-12 09:52:44,175 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1248167292] [2020-10-12 09:52:44,175 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:52:44,175 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-10-12 09:52:44,175 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1933736468] [2020-10-12 09:52:44,176 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-12 09:52:44,176 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:52:44,176 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-12 09:52:44,177 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=187, Unknown=0, NotChecked=0, Total=342 [2020-10-12 09:52:44,177 INFO L87 Difference]: Start difference. First operand 243 states and 251 transitions. Second operand 19 states. [2020-10-12 09:52:44,809 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:52:44,809 INFO L93 Difference]: Finished difference Result 467 states and 488 transitions. [2020-10-12 09:52:44,810 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-12 09:52:44,810 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 237 [2020-10-12 09:52:44,810 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:52:44,812 INFO L225 Difference]: With dead ends: 467 [2020-10-12 09:52:44,812 INFO L226 Difference]: Without dead ends: 264 [2020-10-12 09:52:44,814 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=155, Invalid=187, Unknown=0, NotChecked=0, Total=342 [2020-10-12 09:52:44,815 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 264 states. [2020-10-12 09:52:44,825 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 264 to 257. [2020-10-12 09:52:44,825 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 257 states. [2020-10-12 09:52:44,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 257 states to 257 states and 265 transitions. [2020-10-12 09:52:44,826 INFO L78 Accepts]: Start accepts. Automaton has 257 states and 265 transitions. Word has length 237 [2020-10-12 09:52:44,827 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:52:44,827 INFO L479 AbstractCegarLoop]: Abstraction has 257 states and 265 transitions. [2020-10-12 09:52:44,827 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-12 09:52:44,827 INFO L276 IsEmpty]: Start isEmpty. Operand 257 states and 265 transitions. [2020-10-12 09:52:44,828 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 252 [2020-10-12 09:52:44,828 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:52:44,829 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:52:44,829 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-12 09:52:44,829 INFO L427 AbstractCegarLoop]: === Iteration 17 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:52:44,829 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:52:44,829 INFO L82 PathProgramCache]: Analyzing trace with hash 1380918718, now seen corresponding path program 16 times [2020-10-12 09:52:44,829 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:52:44,829 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1493476635] [2020-10-12 09:52:44,830 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:52:44,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:52:44,845 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:52:44,857 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:52:44,881 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:52:44,916 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:52:44,950 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:52:49,851 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:52:49,851 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 259 [2020-10-12 09:52:49,852 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-12 09:52:49,852 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5009 [2020-10-12 09:52:49,852 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:52:49,852 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-12 09:52:49,852 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 81 [2020-10-12 09:52:49,852 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 34 [2020-10-12 09:52:49,852 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:52:50,095 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:52:50,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:52:50,097 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:52:50,098 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:52:50,098 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:52:50,099 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:52:50,099 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 09:52:50,099 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:52:50,099 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:52:50,099 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:52:50,099 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:52:50,100 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:52:50,123 INFO L134 CoverageAnalysis]: Checked inductivity of 1792 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 1536 trivial. 0 not checked. [2020-10-12 09:52:50,123 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1493476635] [2020-10-12 09:52:50,123 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:52:50,124 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-10-12 09:52:50,124 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1116124863] [2020-10-12 09:52:50,124 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-12 09:52:50,125 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:52:50,125 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-12 09:52:50,125 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=207, Unknown=0, NotChecked=0, Total=380 [2020-10-12 09:52:50,125 INFO L87 Difference]: Start difference. First operand 257 states and 265 transitions. Second operand 20 states. [2020-10-12 09:52:50,851 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:52:50,852 INFO L93 Difference]: Finished difference Result 493 states and 514 transitions. [2020-10-12 09:52:50,852 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-12 09:52:50,852 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 251 [2020-10-12 09:52:50,853 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:52:50,855 INFO L225 Difference]: With dead ends: 493 [2020-10-12 09:52:50,855 INFO L226 Difference]: Without dead ends: 278 [2020-10-12 09:52:50,856 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=173, Invalid=207, Unknown=0, NotChecked=0, Total=380 [2020-10-12 09:52:50,857 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 278 states. [2020-10-12 09:52:50,864 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 278 to 271. [2020-10-12 09:52:50,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 271 states. [2020-10-12 09:52:50,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 271 states to 271 states and 279 transitions. [2020-10-12 09:52:50,866 INFO L78 Accepts]: Start accepts. Automaton has 271 states and 279 transitions. Word has length 251 [2020-10-12 09:52:50,866 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:52:50,866 INFO L479 AbstractCegarLoop]: Abstraction has 271 states and 279 transitions. [2020-10-12 09:52:50,866 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-12 09:52:50,866 INFO L276 IsEmpty]: Start isEmpty. Operand 271 states and 279 transitions. [2020-10-12 09:52:50,868 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 266 [2020-10-12 09:52:50,868 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:52:50,868 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:52:50,868 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-12 09:52:50,869 INFO L427 AbstractCegarLoop]: === Iteration 18 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:52:50,869 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:52:50,869 INFO L82 PathProgramCache]: Analyzing trace with hash -692503024, now seen corresponding path program 17 times [2020-10-12 09:52:50,869 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:52:50,869 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [670575245] [2020-10-12 09:52:50,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:52:50,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:52:50,883 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:52:50,896 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:52:50,934 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:52:50,975 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:52:51,014 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:52:55,932 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:52:55,932 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 273 [2020-10-12 09:52:55,932 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-12 09:52:55,932 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5051 [2020-10-12 09:52:55,932 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:52:55,933 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 19 [2020-10-12 09:52:55,933 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 85 [2020-10-12 09:52:55,933 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 36 [2020-10-12 09:52:55,933 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:52:56,199 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:52:56,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:52:56,201 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:52:56,202 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:52:56,202 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:52:56,202 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:52:56,202 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 09:52:56,202 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:52:56,202 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:52:56,202 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:52:56,202 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:52:56,203 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:52:56,229 INFO L134 CoverageAnalysis]: Checked inductivity of 2023 backedges. 0 proven. 289 refuted. 0 times theorem prover too weak. 1734 trivial. 0 not checked. [2020-10-12 09:52:56,229 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [670575245] [2020-10-12 09:52:56,229 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:52:56,230 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-10-12 09:52:56,230 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1630634013] [2020-10-12 09:52:56,230 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-12 09:52:56,231 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:52:56,231 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-12 09:52:56,231 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=192, Invalid=228, Unknown=0, NotChecked=0, Total=420 [2020-10-12 09:52:56,231 INFO L87 Difference]: Start difference. First operand 271 states and 279 transitions. Second operand 21 states. [2020-10-12 09:52:57,077 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:52:57,077 INFO L93 Difference]: Finished difference Result 519 states and 540 transitions. [2020-10-12 09:52:57,078 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-12 09:52:57,078 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 265 [2020-10-12 09:52:57,078 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:52:57,081 INFO L225 Difference]: With dead ends: 519 [2020-10-12 09:52:57,081 INFO L226 Difference]: Without dead ends: 292 [2020-10-12 09:52:57,085 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=192, Invalid=228, Unknown=0, NotChecked=0, Total=420 [2020-10-12 09:52:57,086 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 292 states. [2020-10-12 09:52:57,096 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 292 to 285. [2020-10-12 09:52:57,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 285 states. [2020-10-12 09:52:57,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 285 states to 285 states and 293 transitions. [2020-10-12 09:52:57,098 INFO L78 Accepts]: Start accepts. Automaton has 285 states and 293 transitions. Word has length 265 [2020-10-12 09:52:57,100 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:52:57,100 INFO L479 AbstractCegarLoop]: Abstraction has 285 states and 293 transitions. [2020-10-12 09:52:57,100 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-12 09:52:57,100 INFO L276 IsEmpty]: Start isEmpty. Operand 285 states and 293 transitions. [2020-10-12 09:52:57,103 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 280 [2020-10-12 09:52:57,104 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:52:57,104 INFO L422 BasicCegarLoop]: trace histogram [18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:52:57,104 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-12 09:52:57,105 INFO L427 AbstractCegarLoop]: === Iteration 19 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:52:57,105 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:52:57,105 INFO L82 PathProgramCache]: Analyzing trace with hash -1553604894, now seen corresponding path program 18 times [2020-10-12 09:52:57,106 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:52:57,106 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [666558083] [2020-10-12 09:52:57,106 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:52:57,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:52:57,133 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:52:57,155 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:52:57,229 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:52:57,307 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:52:57,375 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:53:02,233 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:53:02,233 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 287 [2020-10-12 09:53:02,234 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-12 09:53:02,234 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5104 [2020-10-12 09:53:02,234 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:53:02,234 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-10-12 09:53:02,234 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-12 09:53:02,234 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 38 [2020-10-12 09:53:02,234 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:53:02,534 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:53:02,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:53:02,536 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:53:02,537 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:53:02,537 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:53:02,537 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:53:02,537 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 09:53:02,537 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:53:02,537 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:53:02,537 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:53:02,538 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:53:02,538 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:53:02,569 INFO L134 CoverageAnalysis]: Checked inductivity of 2268 backedges. 0 proven. 324 refuted. 0 times theorem prover too weak. 1944 trivial. 0 not checked. [2020-10-12 09:53:02,570 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [666558083] [2020-10-12 09:53:02,570 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:53:02,570 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-10-12 09:53:02,570 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1464535760] [2020-10-12 09:53:02,571 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-12 09:53:02,571 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:53:02,572 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-12 09:53:02,572 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=212, Invalid=250, Unknown=0, NotChecked=0, Total=462 [2020-10-12 09:53:02,572 INFO L87 Difference]: Start difference. First operand 285 states and 293 transitions. Second operand 22 states. [2020-10-12 09:53:03,291 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:53:03,292 INFO L93 Difference]: Finished difference Result 545 states and 566 transitions. [2020-10-12 09:53:03,292 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-12 09:53:03,292 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 279 [2020-10-12 09:53:03,293 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:53:03,295 INFO L225 Difference]: With dead ends: 545 [2020-10-12 09:53:03,295 INFO L226 Difference]: Without dead ends: 306 [2020-10-12 09:53:03,297 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=212, Invalid=250, Unknown=0, NotChecked=0, Total=462 [2020-10-12 09:53:03,297 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 306 states. [2020-10-12 09:53:03,305 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 306 to 299. [2020-10-12 09:53:03,306 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 299 states. [2020-10-12 09:53:03,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 299 states to 299 states and 307 transitions. [2020-10-12 09:53:03,307 INFO L78 Accepts]: Start accepts. Automaton has 299 states and 307 transitions. Word has length 279 [2020-10-12 09:53:03,307 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:53:03,307 INFO L479 AbstractCegarLoop]: Abstraction has 299 states and 307 transitions. [2020-10-12 09:53:03,308 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-12 09:53:03,308 INFO L276 IsEmpty]: Start isEmpty. Operand 299 states and 307 transitions. [2020-10-12 09:53:03,309 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 294 [2020-10-12 09:53:03,309 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:53:03,310 INFO L422 BasicCegarLoop]: trace histogram [19, 19, 19, 19, 19, 19, 19, 19, 19, 19, 19, 19, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:53:03,310 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-12 09:53:03,310 INFO L427 AbstractCegarLoop]: === Iteration 20 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:53:03,310 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:53:03,311 INFO L82 PathProgramCache]: Analyzing trace with hash -1240717260, now seen corresponding path program 19 times [2020-10-12 09:53:03,311 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:53:03,311 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [891957750] [2020-10-12 09:53:03,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:53:03,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:53:03,331 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:53:03,351 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:53:03,397 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:53:03,445 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:53:03,496 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:53:08,510 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:53:08,510 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 301 [2020-10-12 09:53:08,510 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-12 09:53:08,511 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5183 [2020-10-12 09:53:08,511 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:53:08,511 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 21 [2020-10-12 09:53:08,511 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 93 [2020-10-12 09:53:08,511 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 40 [2020-10-12 09:53:08,511 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:53:08,829 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:53:08,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:53:08,831 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:53:08,832 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:53:08,832 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:53:08,832 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:53:08,832 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 09:53:08,832 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:53:08,832 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:53:08,832 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:53:08,832 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:53:08,833 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:53:08,863 INFO L134 CoverageAnalysis]: Checked inductivity of 2527 backedges. 0 proven. 361 refuted. 0 times theorem prover too weak. 2166 trivial. 0 not checked. [2020-10-12 09:53:08,864 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [891957750] [2020-10-12 09:53:08,864 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:53:08,864 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-10-12 09:53:08,864 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1502043725] [2020-10-12 09:53:08,865 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-12 09:53:08,865 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:53:08,865 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-12 09:53:08,866 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=233, Invalid=273, Unknown=0, NotChecked=0, Total=506 [2020-10-12 09:53:08,866 INFO L87 Difference]: Start difference. First operand 299 states and 307 transitions. Second operand 23 states. [2020-10-12 09:53:09,616 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:53:09,617 INFO L93 Difference]: Finished difference Result 571 states and 592 transitions. [2020-10-12 09:53:09,617 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-12 09:53:09,617 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 293 [2020-10-12 09:53:09,618 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:53:09,620 INFO L225 Difference]: With dead ends: 571 [2020-10-12 09:53:09,621 INFO L226 Difference]: Without dead ends: 320 [2020-10-12 09:53:09,622 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=233, Invalid=273, Unknown=0, NotChecked=0, Total=506 [2020-10-12 09:53:09,623 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 320 states. [2020-10-12 09:53:09,632 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 320 to 313. [2020-10-12 09:53:09,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 313 states. [2020-10-12 09:53:09,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 313 states to 313 states and 321 transitions. [2020-10-12 09:53:09,634 INFO L78 Accepts]: Start accepts. Automaton has 313 states and 321 transitions. Word has length 293 [2020-10-12 09:53:09,634 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:53:09,634 INFO L479 AbstractCegarLoop]: Abstraction has 313 states and 321 transitions. [2020-10-12 09:53:09,634 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-12 09:53:09,634 INFO L276 IsEmpty]: Start isEmpty. Operand 313 states and 321 transitions. [2020-10-12 09:53:09,636 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 308 [2020-10-12 09:53:09,636 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:53:09,636 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:53:09,637 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-10-12 09:53:09,637 INFO L427 AbstractCegarLoop]: === Iteration 21 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:53:09,637 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:53:09,637 INFO L82 PathProgramCache]: Analyzing trace with hash 1097546246, now seen corresponding path program 20 times [2020-10-12 09:53:09,637 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:53:09,638 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1583713052] [2020-10-12 09:53:09,638 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:53:09,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:53:09,658 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:53:09,675 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:53:09,720 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:53:09,770 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:53:09,819 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:53:14,927 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:53:14,927 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 315 [2020-10-12 09:53:14,927 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-12 09:53:14,928 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5274 [2020-10-12 09:53:14,928 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:53:14,928 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 22 [2020-10-12 09:53:14,928 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-12 09:53:14,928 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 42 [2020-10-12 09:53:14,928 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:53:15,367 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:53:15,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:53:15,369 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:53:15,371 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:53:15,371 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:53:15,371 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:53:15,372 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 09:53:15,372 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:53:15,372 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:53:15,372 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:53:15,373 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:53:15,373 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 09:53:15,464 INFO L134 CoverageAnalysis]: Checked inductivity of 2800 backedges. 0 proven. 400 refuted. 0 times theorem prover too weak. 2400 trivial. 0 not checked. [2020-10-12 09:53:15,464 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1583713052] [2020-10-12 09:53:15,465 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:53:15,465 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2020-10-12 09:53:15,465 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1209060619] [2020-10-12 09:53:15,467 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-12 09:53:15,467 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:53:15,467 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-12 09:53:15,470 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=255, Invalid=297, Unknown=0, NotChecked=0, Total=552 [2020-10-12 09:53:15,470 INFO L87 Difference]: Start difference. First operand 313 states and 321 transitions. Second operand 24 states. [2020-10-12 09:53:16,364 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:53:16,364 INFO L93 Difference]: Finished difference Result 597 states and 618 transitions. [2020-10-12 09:53:16,365 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-12 09:53:16,365 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 307 [2020-10-12 09:53:16,365 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:53:16,367 INFO L225 Difference]: With dead ends: 597 [2020-10-12 09:53:16,367 INFO L226 Difference]: Without dead ends: 334 [2020-10-12 09:53:16,369 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=255, Invalid=297, Unknown=0, NotChecked=0, Total=552 [2020-10-12 09:53:16,369 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 334 states. [2020-10-12 09:53:16,378 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 334 to 327. [2020-10-12 09:53:16,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 327 states. [2020-10-12 09:53:16,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 327 states to 327 states and 335 transitions. [2020-10-12 09:53:16,380 INFO L78 Accepts]: Start accepts. Automaton has 327 states and 335 transitions. Word has length 307 [2020-10-12 09:53:16,380 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:53:16,380 INFO L479 AbstractCegarLoop]: Abstraction has 327 states and 335 transitions. [2020-10-12 09:53:16,381 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-12 09:53:16,381 INFO L276 IsEmpty]: Start isEmpty. Operand 327 states and 335 transitions. [2020-10-12 09:53:16,383 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 322 [2020-10-12 09:53:16,383 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:53:16,383 INFO L422 BasicCegarLoop]: trace histogram [21, 21, 21, 21, 21, 21, 21, 21, 21, 21, 21, 21, 21, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:53:16,383 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-10-12 09:53:16,383 INFO L427 AbstractCegarLoop]: === Iteration 22 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:53:16,384 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:53:16,384 INFO L82 PathProgramCache]: Analyzing trace with hash 1061827672, now seen corresponding path program 21 times [2020-10-12 09:53:16,384 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:53:16,384 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1289084395] [2020-10-12 09:53:16,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:53:16,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:53:16,407 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:53:16,428 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:53:16,536 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:53:16,623 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:53:16,705 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:53:22,244 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:53:22,244 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 329 [2020-10-12 09:53:22,244 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-12 09:53:22,244 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5842 [2020-10-12 09:53:22,244 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:53:22,245 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 23 [2020-10-12 09:53:22,245 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 57 [2020-10-12 09:53:22,245 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 44 [2020-10-12 09:53:22,245 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:53:22,695 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:53:22,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:53:22,697 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:53:22,698 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:53:22,698 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:53:22,698 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:53:22,698 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 09:53:22,698 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:53:22,699 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:53:22,699 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:53:22,699 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:53:22,699 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:53:22,762 INFO L134 CoverageAnalysis]: Checked inductivity of 3087 backedges. 0 proven. 441 refuted. 0 times theorem prover too weak. 2646 trivial. 0 not checked. [2020-10-12 09:53:22,762 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1289084395] [2020-10-12 09:53:22,763 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:53:22,763 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2020-10-12 09:53:22,763 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1667651440] [2020-10-12 09:53:22,764 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-12 09:53:22,764 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:53:22,764 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-12 09:53:22,765 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=278, Invalid=322, Unknown=0, NotChecked=0, Total=600 [2020-10-12 09:53:22,765 INFO L87 Difference]: Start difference. First operand 327 states and 335 transitions. Second operand 25 states. [2020-10-12 09:53:23,738 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:53:23,738 INFO L93 Difference]: Finished difference Result 623 states and 644 transitions. [2020-10-12 09:53:23,741 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-12 09:53:23,742 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 321 [2020-10-12 09:53:23,742 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:53:23,746 INFO L225 Difference]: With dead ends: 623 [2020-10-12 09:53:23,746 INFO L226 Difference]: Without dead ends: 348 [2020-10-12 09:53:23,747 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=278, Invalid=322, Unknown=0, NotChecked=0, Total=600 [2020-10-12 09:53:23,748 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 348 states. [2020-10-12 09:53:23,762 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 348 to 341. [2020-10-12 09:53:23,763 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 341 states. [2020-10-12 09:53:23,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 341 states to 341 states and 349 transitions. [2020-10-12 09:53:23,765 INFO L78 Accepts]: Start accepts. Automaton has 341 states and 349 transitions. Word has length 321 [2020-10-12 09:53:23,766 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:53:23,766 INFO L479 AbstractCegarLoop]: Abstraction has 341 states and 349 transitions. [2020-10-12 09:53:23,766 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-12 09:53:23,766 INFO L276 IsEmpty]: Start isEmpty. Operand 341 states and 349 transitions. [2020-10-12 09:53:23,770 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 336 [2020-10-12 09:53:23,770 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:53:23,771 INFO L422 BasicCegarLoop]: trace histogram [22, 22, 22, 22, 22, 22, 22, 22, 22, 22, 22, 22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:53:23,771 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-10-12 09:53:23,771 INFO L427 AbstractCegarLoop]: === Iteration 23 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:53:23,771 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:53:23,772 INFO L82 PathProgramCache]: Analyzing trace with hash -2106050774, now seen corresponding path program 22 times [2020-10-12 09:53:23,772 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:53:23,781 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1248766926] [2020-10-12 09:53:23,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:53:23,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:53:23,820 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:53:23,852 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:53:23,957 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:53:24,055 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:53:24,139 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:53:29,014 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:53:29,014 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 343 [2020-10-12 09:53:29,014 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-12 09:53:29,014 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5201 [2020-10-12 09:53:29,015 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:53:29,015 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 24 [2020-10-12 09:53:29,015 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 105 [2020-10-12 09:53:29,015 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 46 [2020-10-12 09:53:29,015 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:53:29,438 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:53:29,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:53:29,440 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:53:29,441 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:53:29,441 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:53:29,441 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:53:29,442 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 09:53:29,442 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:53:29,442 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:53:29,442 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:53:29,442 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:53:29,442 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:53:29,485 INFO L134 CoverageAnalysis]: Checked inductivity of 3388 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 2904 trivial. 0 not checked. [2020-10-12 09:53:29,485 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1248766926] [2020-10-12 09:53:29,486 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:53:29,486 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2020-10-12 09:53:29,486 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1825061175] [2020-10-12 09:53:29,487 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-10-12 09:53:29,487 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:53:29,487 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-10-12 09:53:29,488 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=302, Invalid=348, Unknown=0, NotChecked=0, Total=650 [2020-10-12 09:53:29,488 INFO L87 Difference]: Start difference. First operand 341 states and 349 transitions. Second operand 26 states. [2020-10-12 09:53:30,560 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:53:30,561 INFO L93 Difference]: Finished difference Result 649 states and 670 transitions. [2020-10-12 09:53:30,561 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-12 09:53:30,561 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 335 [2020-10-12 09:53:30,562 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:53:30,563 INFO L225 Difference]: With dead ends: 649 [2020-10-12 09:53:30,564 INFO L226 Difference]: Without dead ends: 362 [2020-10-12 09:53:30,565 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=302, Invalid=348, Unknown=0, NotChecked=0, Total=650 [2020-10-12 09:53:30,566 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 362 states. [2020-10-12 09:53:30,575 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 362 to 355. [2020-10-12 09:53:30,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 355 states. [2020-10-12 09:53:30,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 355 states to 355 states and 363 transitions. [2020-10-12 09:53:30,577 INFO L78 Accepts]: Start accepts. Automaton has 355 states and 363 transitions. Word has length 335 [2020-10-12 09:53:30,577 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:53:30,577 INFO L479 AbstractCegarLoop]: Abstraction has 355 states and 363 transitions. [2020-10-12 09:53:30,577 INFO L480 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-10-12 09:53:30,577 INFO L276 IsEmpty]: Start isEmpty. Operand 355 states and 363 transitions. [2020-10-12 09:53:30,580 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 350 [2020-10-12 09:53:30,580 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:53:30,580 INFO L422 BasicCegarLoop]: trace histogram [23, 23, 23, 23, 23, 23, 23, 23, 23, 23, 23, 23, 23, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:53:30,580 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-10-12 09:53:30,580 INFO L427 AbstractCegarLoop]: === Iteration 24 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:53:30,581 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:53:30,581 INFO L82 PathProgramCache]: Analyzing trace with hash 1221354108, now seen corresponding path program 23 times [2020-10-12 09:53:30,581 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:53:30,581 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1732533204] [2020-10-12 09:53:30,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:53:30,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:53:30,604 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:53:30,627 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:53:30,713 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:53:30,818 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:53:30,936 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:53:35,652 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:53:35,652 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 357 [2020-10-12 09:53:35,653 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-12 09:53:35,653 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5053 [2020-10-12 09:53:35,653 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:53:35,653 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 25 [2020-10-12 09:53:35,653 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 61 [2020-10-12 09:53:35,653 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 48 [2020-10-12 09:53:35,653 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:53:36,085 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:53:36,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:53:36,087 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:53:36,089 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:53:36,089 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:53:36,089 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:53:36,090 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 09:53:36,090 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:53:36,090 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:53:36,090 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:53:36,091 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:53:36,091 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:53:36,170 INFO L134 CoverageAnalysis]: Checked inductivity of 3703 backedges. 0 proven. 529 refuted. 0 times theorem prover too weak. 3174 trivial. 0 not checked. [2020-10-12 09:53:36,171 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1732533204] [2020-10-12 09:53:36,171 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:53:36,171 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2020-10-12 09:53:36,171 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1631860046] [2020-10-12 09:53:36,172 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-10-12 09:53:36,172 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:53:36,172 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-10-12 09:53:36,173 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=327, Invalid=375, Unknown=0, NotChecked=0, Total=702 [2020-10-12 09:53:36,173 INFO L87 Difference]: Start difference. First operand 355 states and 363 transitions. Second operand 27 states. [2020-10-12 09:53:37,202 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:53:37,203 INFO L93 Difference]: Finished difference Result 675 states and 696 transitions. [2020-10-12 09:53:37,203 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-12 09:53:37,203 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 349 [2020-10-12 09:53:37,204 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:53:37,205 INFO L225 Difference]: With dead ends: 675 [2020-10-12 09:53:37,205 INFO L226 Difference]: Without dead ends: 376 [2020-10-12 09:53:37,207 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=327, Invalid=375, Unknown=0, NotChecked=0, Total=702 [2020-10-12 09:53:37,207 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 376 states. [2020-10-12 09:53:37,216 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 376 to 369. [2020-10-12 09:53:37,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 369 states. [2020-10-12 09:53:37,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 369 states to 369 states and 377 transitions. [2020-10-12 09:53:37,218 INFO L78 Accepts]: Start accepts. Automaton has 369 states and 377 transitions. Word has length 349 [2020-10-12 09:53:37,218 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:53:37,218 INFO L479 AbstractCegarLoop]: Abstraction has 369 states and 377 transitions. [2020-10-12 09:53:37,219 INFO L480 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-10-12 09:53:37,219 INFO L276 IsEmpty]: Start isEmpty. Operand 369 states and 377 transitions. [2020-10-12 09:53:37,221 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 364 [2020-10-12 09:53:37,221 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:53:37,221 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:53:37,223 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-10-12 09:53:37,225 INFO L427 AbstractCegarLoop]: === Iteration 25 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:53:37,225 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:53:37,225 INFO L82 PathProgramCache]: Analyzing trace with hash 1294325326, now seen corresponding path program 24 times [2020-10-12 09:53:37,225 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:53:37,226 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1827232441] [2020-10-12 09:53:37,226 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:53:37,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:53:37,245 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:53:37,260 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:53:37,312 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:53:37,365 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:53:37,426 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:53:42,553 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:53:42,554 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 371 [2020-10-12 09:53:42,554 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-12 09:53:42,554 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5311 [2020-10-12 09:53:42,554 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:53:42,554 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 26 [2020-10-12 09:53:42,554 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-12 09:53:42,554 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 50 [2020-10-12 09:53:42,555 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:53:43,037 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:53:43,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:53:43,039 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:53:43,040 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:53:43,041 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:53:43,041 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:53:43,041 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 09:53:43,041 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:53:43,042 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:53:43,042 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:53:43,042 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:53:43,042 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:53:43,135 INFO L134 CoverageAnalysis]: Checked inductivity of 4032 backedges. 0 proven. 576 refuted. 0 times theorem prover too weak. 3456 trivial. 0 not checked. [2020-10-12 09:53:43,135 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1827232441] [2020-10-12 09:53:43,136 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:53:43,136 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2020-10-12 09:53:43,136 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2006360611] [2020-10-12 09:53:43,136 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-10-12 09:53:43,136 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:53:43,137 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-10-12 09:53:43,137 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=353, Invalid=403, Unknown=0, NotChecked=0, Total=756 [2020-10-12 09:53:43,137 INFO L87 Difference]: Start difference. First operand 369 states and 377 transitions. Second operand 28 states. [2020-10-12 09:53:44,172 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:53:44,172 INFO L93 Difference]: Finished difference Result 701 states and 722 transitions. [2020-10-12 09:53:44,173 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-12 09:53:44,173 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 363 [2020-10-12 09:53:44,173 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:53:44,176 INFO L225 Difference]: With dead ends: 701 [2020-10-12 09:53:44,176 INFO L226 Difference]: Without dead ends: 390 [2020-10-12 09:53:44,177 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=353, Invalid=403, Unknown=0, NotChecked=0, Total=756 [2020-10-12 09:53:44,178 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 390 states. [2020-10-12 09:53:44,186 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 390 to 383. [2020-10-12 09:53:44,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 383 states. [2020-10-12 09:53:44,187 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 383 states to 383 states and 391 transitions. [2020-10-12 09:53:44,187 INFO L78 Accepts]: Start accepts. Automaton has 383 states and 391 transitions. Word has length 363 [2020-10-12 09:53:44,188 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:53:44,188 INFO L479 AbstractCegarLoop]: Abstraction has 383 states and 391 transitions. [2020-10-12 09:53:44,188 INFO L480 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-10-12 09:53:44,188 INFO L276 IsEmpty]: Start isEmpty. Operand 383 states and 391 transitions. [2020-10-12 09:53:44,190 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 378 [2020-10-12 09:53:44,191 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:53:44,191 INFO L422 BasicCegarLoop]: trace histogram [25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:53:44,191 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-10-12 09:53:44,191 INFO L427 AbstractCegarLoop]: === Iteration 26 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:53:44,192 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:53:44,192 INFO L82 PathProgramCache]: Analyzing trace with hash 1500230304, now seen corresponding path program 25 times [2020-10-12 09:53:44,192 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:53:44,192 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1904906918] [2020-10-12 09:53:44,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:53:44,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:53:44,216 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:53:44,240 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:53:44,297 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:53:44,367 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:53:44,440 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:53:49,840 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:53:49,840 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 385 [2020-10-12 09:53:49,840 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-12 09:53:49,840 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5629 [2020-10-12 09:53:49,840 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:53:49,840 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 27 [2020-10-12 09:53:49,840 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-12 09:53:49,841 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 52 [2020-10-12 09:53:49,841 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:53:50,452 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:53:50,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:53:50,454 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:53:50,455 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:53:50,455 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:53:50,456 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:53:50,456 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 09:53:50,456 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:53:50,456 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:53:50,456 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:53:50,456 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:53:50,457 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:53:50,546 INFO L134 CoverageAnalysis]: Checked inductivity of 4375 backedges. 0 proven. 625 refuted. 0 times theorem prover too weak. 3750 trivial. 0 not checked. [2020-10-12 09:53:50,547 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1904906918] [2020-10-12 09:53:50,547 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:53:50,547 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29] total 29 [2020-10-12 09:53:50,548 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1229402383] [2020-10-12 09:53:50,550 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-10-12 09:53:50,550 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:53:50,550 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-10-12 09:53:50,551 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=380, Invalid=432, Unknown=0, NotChecked=0, Total=812 [2020-10-12 09:53:50,551 INFO L87 Difference]: Start difference. First operand 383 states and 391 transitions. Second operand 29 states. [2020-10-12 09:53:51,670 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:53:51,670 INFO L93 Difference]: Finished difference Result 727 states and 748 transitions. [2020-10-12 09:53:51,671 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-12 09:53:51,671 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 377 [2020-10-12 09:53:51,671 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:53:51,673 INFO L225 Difference]: With dead ends: 727 [2020-10-12 09:53:51,674 INFO L226 Difference]: Without dead ends: 404 [2020-10-12 09:53:51,675 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=380, Invalid=432, Unknown=0, NotChecked=0, Total=812 [2020-10-12 09:53:51,676 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 404 states. [2020-10-12 09:53:51,683 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 404 to 397. [2020-10-12 09:53:51,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 397 states. [2020-10-12 09:53:51,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 397 states to 397 states and 405 transitions. [2020-10-12 09:53:51,685 INFO L78 Accepts]: Start accepts. Automaton has 397 states and 405 transitions. Word has length 377 [2020-10-12 09:53:51,685 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:53:51,685 INFO L479 AbstractCegarLoop]: Abstraction has 397 states and 405 transitions. [2020-10-12 09:53:51,685 INFO L480 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-10-12 09:53:51,685 INFO L276 IsEmpty]: Start isEmpty. Operand 397 states and 405 transitions. [2020-10-12 09:53:51,688 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 392 [2020-10-12 09:53:51,688 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:53:51,688 INFO L422 BasicCegarLoop]: trace histogram [26, 26, 26, 26, 26, 26, 26, 26, 26, 26, 26, 26, 26, 26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:53:51,688 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-10-12 09:53:51,689 INFO L427 AbstractCegarLoop]: === Iteration 27 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:53:51,689 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:53:51,689 INFO L82 PathProgramCache]: Analyzing trace with hash 1485641586, now seen corresponding path program 26 times [2020-10-12 09:53:51,689 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:53:51,689 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [617481569] [2020-10-12 09:53:51,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:53:51,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:53:51,713 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:53:51,735 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:53:51,820 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:53:51,942 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:53:52,053 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:53:57,484 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:53:57,484 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 399 [2020-10-12 09:53:57,484 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-12 09:53:57,484 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5776 [2020-10-12 09:53:57,484 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:53:57,485 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 28 [2020-10-12 09:53:57,485 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 67 [2020-10-12 09:53:57,485 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 54 [2020-10-12 09:53:57,485 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:53:58,020 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:53:58,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:53:58,022 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:53:58,023 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:53:58,023 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:53:58,023 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:53:58,023 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 09:53:58,023 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:53:58,023 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:53:58,024 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:53:58,024 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:53:58,024 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:53:58,135 INFO L134 CoverageAnalysis]: Checked inductivity of 4732 backedges. 0 proven. 676 refuted. 0 times theorem prover too weak. 4056 trivial. 0 not checked. [2020-10-12 09:53:58,136 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [617481569] [2020-10-12 09:53:58,136 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:53:58,136 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30] total 30 [2020-10-12 09:53:58,136 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1017255229] [2020-10-12 09:53:58,137 INFO L459 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-10-12 09:53:58,138 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:53:58,138 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-10-12 09:53:58,138 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=408, Invalid=462, Unknown=0, NotChecked=0, Total=870 [2020-10-12 09:53:58,138 INFO L87 Difference]: Start difference. First operand 397 states and 405 transitions. Second operand 30 states. [2020-10-12 09:53:59,158 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:53:59,159 INFO L93 Difference]: Finished difference Result 753 states and 774 transitions. [2020-10-12 09:53:59,159 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-10-12 09:53:59,159 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 391 [2020-10-12 09:53:59,160 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:53:59,162 INFO L225 Difference]: With dead ends: 753 [2020-10-12 09:53:59,162 INFO L226 Difference]: Without dead ends: 418 [2020-10-12 09:53:59,164 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=408, Invalid=462, Unknown=0, NotChecked=0, Total=870 [2020-10-12 09:53:59,165 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 418 states. [2020-10-12 09:53:59,173 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 418 to 411. [2020-10-12 09:53:59,173 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 411 states. [2020-10-12 09:53:59,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 411 states to 411 states and 419 transitions. [2020-10-12 09:53:59,175 INFO L78 Accepts]: Start accepts. Automaton has 411 states and 419 transitions. Word has length 391 [2020-10-12 09:53:59,175 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:53:59,175 INFO L479 AbstractCegarLoop]: Abstraction has 411 states and 419 transitions. [2020-10-12 09:53:59,175 INFO L480 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-10-12 09:53:59,175 INFO L276 IsEmpty]: Start isEmpty. Operand 411 states and 419 transitions. [2020-10-12 09:53:59,178 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 406 [2020-10-12 09:53:59,178 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:53:59,178 INFO L422 BasicCegarLoop]: trace histogram [27, 27, 27, 27, 27, 27, 27, 27, 27, 27, 27, 27, 27, 27, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:53:59,178 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-10-12 09:53:59,178 INFO L427 AbstractCegarLoop]: === Iteration 28 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:53:59,179 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:53:59,179 INFO L82 PathProgramCache]: Analyzing trace with hash -394189628, now seen corresponding path program 27 times [2020-10-12 09:53:59,179 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:53:59,179 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2073842987] [2020-10-12 09:53:59,179 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:53:59,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:53:59,203 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:53:59,230 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:53:59,314 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:53:59,383 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:53:59,445 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:54:04,614 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:54:04,614 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 413 [2020-10-12 09:54:04,614 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-12 09:54:04,614 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5415 [2020-10-12 09:54:04,614 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:54:04,614 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 29 [2020-10-12 09:54:04,614 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 125 [2020-10-12 09:54:04,615 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 56 [2020-10-12 09:54:04,615 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:54:05,194 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:54:05,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:54:05,196 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:54:05,198 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:54:05,198 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:54:05,198 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:54:05,198 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 09:54:05,198 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:54:05,199 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:54:05,199 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:54:05,199 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:54:05,199 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:54:05,268 INFO L134 CoverageAnalysis]: Checked inductivity of 5103 backedges. 0 proven. 729 refuted. 0 times theorem prover too weak. 4374 trivial. 0 not checked. [2020-10-12 09:54:05,268 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2073842987] [2020-10-12 09:54:05,268 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:54:05,268 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31] total 31 [2020-10-12 09:54:05,269 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1066268607] [2020-10-12 09:54:05,269 INFO L459 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-10-12 09:54:05,269 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:54:05,270 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-10-12 09:54:05,270 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=437, Invalid=493, Unknown=0, NotChecked=0, Total=930 [2020-10-12 09:54:05,270 INFO L87 Difference]: Start difference. First operand 411 states and 419 transitions. Second operand 31 states. [2020-10-12 09:54:06,475 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:54:06,475 INFO L93 Difference]: Finished difference Result 779 states and 800 transitions. [2020-10-12 09:54:06,476 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-12 09:54:06,476 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 405 [2020-10-12 09:54:06,476 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:54:06,479 INFO L225 Difference]: With dead ends: 779 [2020-10-12 09:54:06,479 INFO L226 Difference]: Without dead ends: 432 [2020-10-12 09:54:06,481 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=437, Invalid=493, Unknown=0, NotChecked=0, Total=930 [2020-10-12 09:54:06,481 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 432 states. [2020-10-12 09:54:06,489 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 432 to 425. [2020-10-12 09:54:06,489 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 425 states. [2020-10-12 09:54:06,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 425 states to 425 states and 433 transitions. [2020-10-12 09:54:06,491 INFO L78 Accepts]: Start accepts. Automaton has 425 states and 433 transitions. Word has length 405 [2020-10-12 09:54:06,491 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:54:06,491 INFO L479 AbstractCegarLoop]: Abstraction has 425 states and 433 transitions. [2020-10-12 09:54:06,491 INFO L480 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-10-12 09:54:06,491 INFO L276 IsEmpty]: Start isEmpty. Operand 425 states and 433 transitions. [2020-10-12 09:54:06,494 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 420 [2020-10-12 09:54:06,494 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:54:06,494 INFO L422 BasicCegarLoop]: trace histogram [28, 28, 28, 28, 28, 28, 28, 28, 28, 28, 28, 28, 28, 28, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:54:06,495 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2020-10-12 09:54:06,495 INFO L427 AbstractCegarLoop]: === Iteration 29 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:54:06,495 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:54:06,495 INFO L82 PathProgramCache]: Analyzing trace with hash 1816590998, now seen corresponding path program 28 times [2020-10-12 09:54:06,495 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:54:06,496 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [370074269] [2020-10-12 09:54:06,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:54:06,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:54:06,520 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:54:06,542 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:54:06,601 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:54:06,665 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:54:06,732 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:54:13,395 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:54:13,395 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 427 [2020-10-12 09:54:13,395 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-12 09:54:13,395 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6880 [2020-10-12 09:54:13,395 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:54:13,396 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 30 [2020-10-12 09:54:13,396 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 129 [2020-10-12 09:54:13,396 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 58 [2020-10-12 09:54:13,396 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:54:14,013 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:54:14,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:54:14,015 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:54:14,016 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:54:14,016 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:54:14,016 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:54:14,017 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 09:54:14,017 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:54:14,017 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:54:14,017 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:54:14,017 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:54:14,017 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:54:14,139 INFO L134 CoverageAnalysis]: Checked inductivity of 5488 backedges. 0 proven. 784 refuted. 0 times theorem prover too weak. 4704 trivial. 0 not checked. [2020-10-12 09:54:14,139 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [370074269] [2020-10-12 09:54:14,140 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:54:14,140 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32] total 32 [2020-10-12 09:54:14,140 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [779997490] [2020-10-12 09:54:14,141 INFO L459 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-10-12 09:54:14,141 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:54:14,141 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-10-12 09:54:14,141 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=467, Invalid=525, Unknown=0, NotChecked=0, Total=992 [2020-10-12 09:54:14,142 INFO L87 Difference]: Start difference. First operand 425 states and 433 transitions. Second operand 32 states. [2020-10-12 09:54:15,331 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:54:15,331 INFO L93 Difference]: Finished difference Result 805 states and 826 transitions. [2020-10-12 09:54:15,331 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-10-12 09:54:15,332 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 419 [2020-10-12 09:54:15,332 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:54:15,334 INFO L225 Difference]: With dead ends: 805 [2020-10-12 09:54:15,335 INFO L226 Difference]: Without dead ends: 446 [2020-10-12 09:54:15,336 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=467, Invalid=525, Unknown=0, NotChecked=0, Total=992 [2020-10-12 09:54:15,337 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 446 states. [2020-10-12 09:54:15,344 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 446 to 439. [2020-10-12 09:54:15,345 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 439 states. [2020-10-12 09:54:15,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 439 states to 439 states and 447 transitions. [2020-10-12 09:54:15,346 INFO L78 Accepts]: Start accepts. Automaton has 439 states and 447 transitions. Word has length 419 [2020-10-12 09:54:15,346 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:54:15,347 INFO L479 AbstractCegarLoop]: Abstraction has 439 states and 447 transitions. [2020-10-12 09:54:15,347 INFO L480 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-10-12 09:54:15,347 INFO L276 IsEmpty]: Start isEmpty. Operand 439 states and 447 transitions. [2020-10-12 09:54:15,349 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 434 [2020-10-12 09:54:15,350 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:54:15,350 INFO L422 BasicCegarLoop]: trace histogram [29, 29, 29, 29, 29, 29, 29, 29, 29, 29, 29, 29, 29, 29, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:54:15,350 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2020-10-12 09:54:15,350 INFO L427 AbstractCegarLoop]: === Iteration 30 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:54:15,351 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:54:15,351 INFO L82 PathProgramCache]: Analyzing trace with hash -1645889304, now seen corresponding path program 29 times [2020-10-12 09:54:15,351 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:54:15,351 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1829074357] [2020-10-12 09:54:15,351 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:54:15,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:54:15,376 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:54:15,400 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:54:15,484 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:54:15,558 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:54:15,633 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:54:21,035 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:54:21,036 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 441 [2020-10-12 09:54:21,036 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-12 09:54:21,036 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5665 [2020-10-12 09:54:21,036 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:54:21,037 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 31 [2020-10-12 09:54:21,037 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 73 [2020-10-12 09:54:21,037 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 60 [2020-10-12 09:54:21,037 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:54:21,688 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:54:21,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:54:21,690 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:54:21,691 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:54:21,691 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:54:21,691 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:54:21,692 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 09:54:21,692 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:54:21,692 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:54:21,692 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:54:21,692 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:54:21,693 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:54:21,767 INFO L134 CoverageAnalysis]: Checked inductivity of 5887 backedges. 0 proven. 841 refuted. 0 times theorem prover too weak. 5046 trivial. 0 not checked. [2020-10-12 09:54:21,768 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1829074357] [2020-10-12 09:54:21,768 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:54:21,768 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33] total 33 [2020-10-12 09:54:21,768 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [108122091] [2020-10-12 09:54:21,769 INFO L459 AbstractCegarLoop]: Interpolant automaton has 33 states [2020-10-12 09:54:21,769 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:54:21,769 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2020-10-12 09:54:21,770 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=498, Invalid=558, Unknown=0, NotChecked=0, Total=1056 [2020-10-12 09:54:21,770 INFO L87 Difference]: Start difference. First operand 439 states and 447 transitions. Second operand 33 states. [2020-10-12 09:54:23,119 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:54:23,120 INFO L93 Difference]: Finished difference Result 831 states and 852 transitions. [2020-10-12 09:54:23,120 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-10-12 09:54:23,120 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 433 [2020-10-12 09:54:23,121 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:54:23,123 INFO L225 Difference]: With dead ends: 831 [2020-10-12 09:54:23,123 INFO L226 Difference]: Without dead ends: 460 [2020-10-12 09:54:23,125 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=498, Invalid=558, Unknown=0, NotChecked=0, Total=1056 [2020-10-12 09:54:23,125 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 460 states. [2020-10-12 09:54:23,133 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 460 to 453. [2020-10-12 09:54:23,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 453 states. [2020-10-12 09:54:23,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 453 states to 453 states and 461 transitions. [2020-10-12 09:54:23,134 INFO L78 Accepts]: Start accepts. Automaton has 453 states and 461 transitions. Word has length 433 [2020-10-12 09:54:23,135 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:54:23,135 INFO L479 AbstractCegarLoop]: Abstraction has 453 states and 461 transitions. [2020-10-12 09:54:23,135 INFO L480 AbstractCegarLoop]: Interpolant automaton has 33 states. [2020-10-12 09:54:23,135 INFO L276 IsEmpty]: Start isEmpty. Operand 453 states and 461 transitions. [2020-10-12 09:54:23,139 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 448 [2020-10-12 09:54:23,139 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:54:23,139 INFO L422 BasicCegarLoop]: trace histogram [30, 30, 30, 30, 30, 30, 30, 30, 30, 30, 30, 30, 30, 30, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:54:23,139 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2020-10-12 09:54:23,140 INFO L427 AbstractCegarLoop]: === Iteration 31 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:54:23,140 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:54:23,140 INFO L82 PathProgramCache]: Analyzing trace with hash -1603502150, now seen corresponding path program 30 times [2020-10-12 09:54:23,140 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:54:23,141 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [397524516] [2020-10-12 09:54:23,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:54:23,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:54:23,168 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:54:23,187 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:54:23,245 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:54:23,335 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:54:23,410 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:54:28,377 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:54:28,377 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 455 [2020-10-12 09:54:28,377 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-12 09:54:28,377 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5215 [2020-10-12 09:54:28,378 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:54:28,378 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 32 [2020-10-12 09:54:28,378 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 75 [2020-10-12 09:54:28,378 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 62 [2020-10-12 09:54:28,378 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:54:29,076 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:54:29,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:54:29,077 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:54:29,079 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:54:29,079 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:54:29,079 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:54:29,079 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 09:54:29,079 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:54:29,080 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:54:29,080 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:54:29,080 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:54:29,080 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:54:29,151 INFO L134 CoverageAnalysis]: Checked inductivity of 6300 backedges. 0 proven. 900 refuted. 0 times theorem prover too weak. 5400 trivial. 0 not checked. [2020-10-12 09:54:29,152 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [397524516] [2020-10-12 09:54:29,152 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:54:29,152 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34] total 34 [2020-10-12 09:54:29,152 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [35014099] [2020-10-12 09:54:29,153 INFO L459 AbstractCegarLoop]: Interpolant automaton has 34 states [2020-10-12 09:54:29,153 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:54:29,153 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2020-10-12 09:54:29,154 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=530, Invalid=592, Unknown=0, NotChecked=0, Total=1122 [2020-10-12 09:54:29,154 INFO L87 Difference]: Start difference. First operand 453 states and 461 transitions. Second operand 34 states. [2020-10-12 09:54:30,593 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:54:30,593 INFO L93 Difference]: Finished difference Result 857 states and 878 transitions. [2020-10-12 09:54:30,594 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-10-12 09:54:30,594 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 447 [2020-10-12 09:54:30,594 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:54:30,597 INFO L225 Difference]: With dead ends: 857 [2020-10-12 09:54:30,597 INFO L226 Difference]: Without dead ends: 474 [2020-10-12 09:54:30,599 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=530, Invalid=592, Unknown=0, NotChecked=0, Total=1122 [2020-10-12 09:54:30,599 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 474 states. [2020-10-12 09:54:30,607 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 474 to 467. [2020-10-12 09:54:30,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 467 states. [2020-10-12 09:54:30,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 467 states to 467 states and 475 transitions. [2020-10-12 09:54:30,608 INFO L78 Accepts]: Start accepts. Automaton has 467 states and 475 transitions. Word has length 447 [2020-10-12 09:54:30,609 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:54:30,609 INFO L479 AbstractCegarLoop]: Abstraction has 467 states and 475 transitions. [2020-10-12 09:54:30,609 INFO L480 AbstractCegarLoop]: Interpolant automaton has 34 states. [2020-10-12 09:54:30,609 INFO L276 IsEmpty]: Start isEmpty. Operand 467 states and 475 transitions. [2020-10-12 09:54:30,612 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 462 [2020-10-12 09:54:30,612 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:54:30,613 INFO L422 BasicCegarLoop]: trace histogram [31, 31, 31, 31, 31, 31, 31, 31, 31, 31, 31, 31, 31, 31, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:54:30,613 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2020-10-12 09:54:30,613 INFO L427 AbstractCegarLoop]: === Iteration 32 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:54:30,613 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:54:30,614 INFO L82 PathProgramCache]: Analyzing trace with hash -1846382836, now seen corresponding path program 31 times [2020-10-12 09:54:30,614 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:54:30,614 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [506585358] [2020-10-12 09:54:30,614 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:54:30,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:54:30,640 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:54:30,665 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:54:30,767 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:54:30,922 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:54:31,009 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:54:53,880 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:54:53,880 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 469 [2020-10-12 09:54:53,880 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-12 09:54:53,880 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 23245 [2020-10-12 09:54:53,880 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:54:53,880 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 33 [2020-10-12 09:54:53,880 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 205 [2020-10-12 09:54:53,881 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 64 [2020-10-12 09:54:53,881 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:54:54,628 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:54:54,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:54:54,630 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:54:54,631 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:54:54,631 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:54:54,631 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:54:54,631 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 09:54:54,631 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:54:54,632 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:54:54,632 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:54:54,632 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:54:54,632 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:54:54,707 INFO L134 CoverageAnalysis]: Checked inductivity of 6727 backedges. 0 proven. 961 refuted. 0 times theorem prover too weak. 5766 trivial. 0 not checked. [2020-10-12 09:54:54,708 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [506585358] [2020-10-12 09:54:54,708 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:54:54,708 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35] total 35 [2020-10-12 09:54:54,708 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [336703287] [2020-10-12 09:54:54,709 INFO L459 AbstractCegarLoop]: Interpolant automaton has 35 states [2020-10-12 09:54:54,709 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:54:54,709 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2020-10-12 09:54:54,709 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=563, Invalid=627, Unknown=0, NotChecked=0, Total=1190 [2020-10-12 09:54:54,710 INFO L87 Difference]: Start difference. First operand 467 states and 475 transitions. Second operand 35 states. [2020-10-12 09:54:56,085 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:54:56,085 INFO L93 Difference]: Finished difference Result 883 states and 904 transitions. [2020-10-12 09:54:56,086 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-10-12 09:54:56,086 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 461 [2020-10-12 09:54:56,086 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:54:56,089 INFO L225 Difference]: With dead ends: 883 [2020-10-12 09:54:56,090 INFO L226 Difference]: Without dead ends: 488 [2020-10-12 09:54:56,091 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=563, Invalid=627, Unknown=0, NotChecked=0, Total=1190 [2020-10-12 09:54:56,092 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 488 states. [2020-10-12 09:54:56,100 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 488 to 481. [2020-10-12 09:54:56,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 481 states. [2020-10-12 09:54:56,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 481 states to 481 states and 489 transitions. [2020-10-12 09:54:56,102 INFO L78 Accepts]: Start accepts. Automaton has 481 states and 489 transitions. Word has length 461 [2020-10-12 09:54:56,102 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:54:56,102 INFO L479 AbstractCegarLoop]: Abstraction has 481 states and 489 transitions. [2020-10-12 09:54:56,103 INFO L480 AbstractCegarLoop]: Interpolant automaton has 35 states. [2020-10-12 09:54:56,103 INFO L276 IsEmpty]: Start isEmpty. Operand 481 states and 489 transitions. [2020-10-12 09:54:56,106 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 476 [2020-10-12 09:54:56,106 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:54:56,106 INFO L422 BasicCegarLoop]: trace histogram [32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:54:56,107 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2020-10-12 09:54:56,107 INFO L427 AbstractCegarLoop]: === Iteration 33 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:54:56,107 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:54:56,107 INFO L82 PathProgramCache]: Analyzing trace with hash -1651071266, now seen corresponding path program 32 times [2020-10-12 09:54:56,107 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:54:56,108 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [882282104] [2020-10-12 09:54:56,108 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:54:56,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:54:56,133 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:54:56,158 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:54:56,236 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:54:56,327 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:54:56,410 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:55:01,129 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:55:01,130 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 483 [2020-10-12 09:55:01,130 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-12 09:55:01,130 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-12 09:55:01,130 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:55:01,130 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 34 [2020-10-12 09:55:01,130 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-12 09:55:01,130 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 66 [2020-10-12 09:55:01,130 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:55:01,918 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:55:01,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:55:01,920 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:55:01,921 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:55:01,921 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:55:01,921 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:55:01,921 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 09:55:01,922 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:55:01,922 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:55:01,922 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:55:01,922 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:55:01,922 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:55:02,000 INFO L134 CoverageAnalysis]: Checked inductivity of 7168 backedges. 0 proven. 1024 refuted. 0 times theorem prover too weak. 6144 trivial. 0 not checked. [2020-10-12 09:55:02,001 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [882282104] [2020-10-12 09:55:02,001 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:55:02,001 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36] total 36 [2020-10-12 09:55:02,001 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1560598895] [2020-10-12 09:55:02,001 INFO L459 AbstractCegarLoop]: Interpolant automaton has 36 states [2020-10-12 09:55:02,002 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:55:02,002 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2020-10-12 09:55:02,003 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=597, Invalid=663, Unknown=0, NotChecked=0, Total=1260 [2020-10-12 09:55:02,003 INFO L87 Difference]: Start difference. First operand 481 states and 489 transitions. Second operand 36 states. [2020-10-12 09:55:03,361 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:55:03,362 INFO L93 Difference]: Finished difference Result 909 states and 930 transitions. [2020-10-12 09:55:03,362 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-10-12 09:55:03,362 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 475 [2020-10-12 09:55:03,363 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:55:03,365 INFO L225 Difference]: With dead ends: 909 [2020-10-12 09:55:03,365 INFO L226 Difference]: Without dead ends: 502 [2020-10-12 09:55:03,367 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=597, Invalid=663, Unknown=0, NotChecked=0, Total=1260 [2020-10-12 09:55:03,367 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 502 states. [2020-10-12 09:55:03,374 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 502 to 495. [2020-10-12 09:55:03,375 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 495 states. [2020-10-12 09:55:03,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 495 states to 495 states and 503 transitions. [2020-10-12 09:55:03,376 INFO L78 Accepts]: Start accepts. Automaton has 495 states and 503 transitions. Word has length 475 [2020-10-12 09:55:03,376 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:55:03,377 INFO L479 AbstractCegarLoop]: Abstraction has 495 states and 503 transitions. [2020-10-12 09:55:03,377 INFO L480 AbstractCegarLoop]: Interpolant automaton has 36 states. [2020-10-12 09:55:03,377 INFO L276 IsEmpty]: Start isEmpty. Operand 495 states and 503 transitions. [2020-10-12 09:55:03,380 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 490 [2020-10-12 09:55:03,380 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:55:03,380 INFO L422 BasicCegarLoop]: trace histogram [33, 33, 33, 33, 33, 33, 33, 33, 33, 33, 33, 33, 33, 33, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:55:03,381 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2020-10-12 09:55:03,381 INFO L427 AbstractCegarLoop]: === Iteration 34 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:55:03,381 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:55:03,381 INFO L82 PathProgramCache]: Analyzing trace with hash -1920973008, now seen corresponding path program 33 times [2020-10-12 09:55:03,381 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:55:03,382 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1397518587] [2020-10-12 09:55:03,382 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:55:03,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:55:03,407 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:55:03,431 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:55:03,522 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:55:03,611 FATAL L256 erpolLogProxyWrapper]: Now shrinking...