/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=NARROWEST --traceabstraction.additional.smt.options log-additional-information=true --traceabstraction.additional.smt.options unknown-allowed=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/loops-crafted-1/mono-crafted_11.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-adbd35c [2020-10-13 10:59:55,630 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-13 10:59:55,633 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-13 10:59:55,656 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-13 10:59:55,656 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-13 10:59:55,658 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-13 10:59:55,659 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-13 10:59:55,660 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-13 10:59:55,662 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-13 10:59:55,663 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-13 10:59:55,664 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-13 10:59:55,665 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-13 10:59:55,665 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-13 10:59:55,666 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-13 10:59:55,667 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-13 10:59:55,669 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-13 10:59:55,669 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-13 10:59:55,670 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-13 10:59:55,672 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-13 10:59:55,675 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-13 10:59:55,676 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-13 10:59:55,682 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-13 10:59:55,683 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-13 10:59:55,684 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-13 10:59:55,688 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-13 10:59:55,688 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-13 10:59:55,689 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-13 10:59:55,690 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-13 10:59:55,692 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-13 10:59:55,693 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-13 10:59:55,694 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-13 10:59:55,694 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-13 10:59:55,697 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-13 10:59:55,698 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-13 10:59:55,700 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-13 10:59:55,700 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-13 10:59:55,701 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-13 10:59:55,701 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-13 10:59:55,702 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-13 10:59:55,703 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-13 10:59:55,705 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-13 10:59:55,705 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 [2020-10-13 10:59:55,748 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-13 10:59:55,748 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-13 10:59:55,750 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-13 10:59:55,750 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-13 10:59:55,751 INFO L138 SettingsManager]: * Use SBE=true [2020-10-13 10:59:55,751 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-13 10:59:55,751 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-13 10:59:55,751 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-13 10:59:55,751 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-13 10:59:55,752 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-13 10:59:55,753 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-13 10:59:55,753 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-13 10:59:55,753 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-13 10:59:55,754 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-13 10:59:55,754 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-13 10:59:55,754 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-13 10:59:55,754 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-13 10:59:55,755 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-13 10:59:55,755 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-13 10:59:55,755 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-13 10:59:55,755 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-13 10:59:55,755 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-13 10:59:55,756 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-13 10:59:55,756 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-13 10:59:55,756 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-13 10:59:55,756 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-13 10:59:55,756 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-13 10:59:55,757 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-13 10:59:55,757 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-13 10:59:55,757 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=NARROWEST;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=NARROWEST;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=NARROWEST;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=NARROWEST;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=NARROWEST;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=NARROWEST;log-additional-information=true;unknown-allowed=true; [2020-10-13 10:59:56,057 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-13 10:59:56,070 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-13 10:59:56,073 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-13 10:59:56,075 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-13 10:59:56,075 INFO L275 PluginConnector]: CDTParser initialized [2020-10-13 10:59:56,076 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops-crafted-1/mono-crafted_11.c [2020-10-13 10:59:56,138 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/578d81334/0e6431cbcf0040a7ab36cc7e558c4fb2/FLAG9e21dcdda [2020-10-13 10:59:56,520 INFO L306 CDTParser]: Found 1 translation units. [2020-10-13 10:59:56,521 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/loops-crafted-1/mono-crafted_11.c [2020-10-13 10:59:56,531 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/578d81334/0e6431cbcf0040a7ab36cc7e558c4fb2/FLAG9e21dcdda [2020-10-13 10:59:56,886 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/578d81334/0e6431cbcf0040a7ab36cc7e558c4fb2 [2020-10-13 10:59:56,895 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-13 10:59:56,897 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-13 10:59:56,898 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-13 10:59:56,898 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-13 10:59:56,904 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-13 10:59:56,905 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 10:59:56" (1/1) ... [2020-10-13 10:59:56,909 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@16febf07 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:59:56, skipping insertion in model container [2020-10-13 10:59:56,910 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 10:59:56" (1/1) ... [2020-10-13 10:59:56,919 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-13 10:59:56,936 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-13 10:59:57,155 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-13 10:59:57,160 INFO L203 MainTranslator]: Completed pre-run [2020-10-13 10:59:57,176 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-13 10:59:57,191 INFO L208 MainTranslator]: Completed translation [2020-10-13 10:59:57,191 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:59:57 WrapperNode [2020-10-13 10:59:57,192 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-13 10:59:57,193 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-13 10:59:57,193 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-13 10:59:57,193 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-13 10:59:57,207 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:59:57" (1/1) ... [2020-10-13 10:59:57,207 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:59:57" (1/1) ... [2020-10-13 10:59:57,212 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:59:57" (1/1) ... [2020-10-13 10:59:57,213 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:59:57" (1/1) ... [2020-10-13 10:59:57,217 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:59:57" (1/1) ... [2020-10-13 10:59:57,221 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:59:57" (1/1) ... [2020-10-13 10:59:57,222 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:59:57" (1/1) ... [2020-10-13 10:59:57,316 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-13 10:59:57,318 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-13 10:59:57,319 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-13 10:59:57,319 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-13 10:59:57,320 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:59:57" (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 [2020-10-13 10:59:57,380 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-13 10:59:57,380 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-13 10:59:57,380 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-13 10:59:57,380 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-13 10:59:57,381 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-10-13 10:59:57,381 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-13 10:59:57,381 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-13 10:59:57,382 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-13 10:59:57,382 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-13 10:59:57,620 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-13 10:59:57,621 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-10-13 10:59:57,625 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 10:59:57 BoogieIcfgContainer [2020-10-13 10:59:57,625 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-13 10:59:57,628 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-13 10:59:57,628 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-13 10:59:57,632 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-13 10:59:57,633 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 10:59:56" (1/3) ... [2020-10-13 10:59:57,634 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6c2584ce and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 10:59:57, skipping insertion in model container [2020-10-13 10:59:57,634 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:59:57" (2/3) ... [2020-10-13 10:59:57,635 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6c2584ce and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 10:59:57, skipping insertion in model container [2020-10-13 10:59:57,636 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 10:59:57" (3/3) ... [2020-10-13 10:59:57,638 INFO L109 eAbstractionObserver]: Analyzing ICFG mono-crafted_11.c [2020-10-13 10:59:57,649 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-13 10:59:57,661 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-13 10:59:57,675 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-13 10:59:57,701 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-10-13 10:59:57,701 INFO L376 AbstractCegarLoop]: Hoare is true [2020-10-13 10:59:57,701 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-13 10:59:57,701 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-13 10:59:57,701 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-13 10:59:57,702 INFO L380 AbstractCegarLoop]: Difference is false [2020-10-13 10:59:57,702 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-13 10:59:57,702 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-13 10:59:57,720 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states. [2020-10-13 10:59:57,726 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-10-13 10:59:57,727 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:59:57,728 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:59:57,728 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:59:57,734 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:59:57,735 INFO L82 PathProgramCache]: Analyzing trace with hash 1712329921, now seen corresponding path program 1 times [2020-10-13 10:59:57,744 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:59:57,744 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1930343807] [2020-10-13 10:59:57,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:59:57,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:59:57,864 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:59:57,907 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:59:58,097 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:59:58,097 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 18 [2020-10-13 10:59:58,098 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 10:59:58,098 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 244 [2020-10-13 10:59:58,100 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:59:58,101 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:59:58,101 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 10:59:58,101 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:59:58,101 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-13 10:59:58,141 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:59:58,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:59:58,146 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:59:58,155 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:59:58,155 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 10:59:58,156 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:59:58,158 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-10-13 10:59:58,159 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:59:58,159 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:59:58,159 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:59:58,160 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:59:58,160 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 10:59:58,166 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:59:58,168 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1930343807] [2020-10-13 10:59:58,170 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 10:59:58,170 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-10-13 10:59:58,172 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1185313589] [2020-10-13 10:59:58,177 INFO L459 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-10-13 10:59:58,179 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:59:58,193 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-10-13 10:59:58,194 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-10-13 10:59:58,197 INFO L87 Difference]: Start difference. First operand 19 states. Second operand 2 states. [2020-10-13 10:59:58,222 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:59:58,223 INFO L93 Difference]: Finished difference Result 31 states and 35 transitions. [2020-10-13 10:59:58,223 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-10-13 10:59:58,225 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 10 [2020-10-13 10:59:58,225 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:59:58,234 INFO L225 Difference]: With dead ends: 31 [2020-10-13 10:59:58,234 INFO L226 Difference]: Without dead ends: 12 [2020-10-13 10:59:58,238 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-10-13 10:59:58,258 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2020-10-13 10:59:58,278 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 12. [2020-10-13 10:59:58,280 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2020-10-13 10:59:58,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 13 transitions. [2020-10-13 10:59:58,283 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 13 transitions. Word has length 10 [2020-10-13 10:59:58,284 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:59:58,284 INFO L479 AbstractCegarLoop]: Abstraction has 12 states and 13 transitions. [2020-10-13 10:59:58,285 INFO L480 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-10-13 10:59:58,285 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 13 transitions. [2020-10-13 10:59:58,286 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-10-13 10:59:58,287 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:59:58,287 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:59:58,288 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-13 10:59:58,288 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:59:58,288 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:59:58,289 INFO L82 PathProgramCache]: Analyzing trace with hash 1703094711, now seen corresponding path program 1 times [2020-10-13 10:59:58,289 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:59:58,289 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [398356281] [2020-10-13 10:59:58,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:59:58,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:59:58,329 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:59:58,368 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:59:58,462 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:59:58,463 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 18 [2020-10-13 10:59:58,463 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 10:59:58,463 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 147 [2020-10-13 10:59:58,464 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:59:58,464 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 10:59:58,464 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-13 10:59:58,465 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-13 10:59:58,465 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 10:59:58,642 WARN L193 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 5 [2020-10-13 10:59:58,645 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:59:58,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:59:58,647 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:59:58,650 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:59:58,651 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 10:59:58,651 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:59:58,651 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-13 10:59:58,652 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:59:58,652 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:59:58,652 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:59:58,653 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:59:58,653 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 10:59:58,655 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:59:58,655 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [398356281] [2020-10-13 10:59:58,656 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 10:59:58,656 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-13 10:59:58,656 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2078138296] [2020-10-13 10:59:58,658 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-13 10:59:58,658 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:59:58,659 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-13 10:59:58,659 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-13 10:59:58,659 INFO L87 Difference]: Start difference. First operand 12 states and 13 transitions. Second operand 3 states. [2020-10-13 10:59:58,683 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:59:58,683 INFO L93 Difference]: Finished difference Result 21 states and 25 transitions. [2020-10-13 10:59:58,684 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-13 10:59:58,684 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 10 [2020-10-13 10:59:58,684 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:59:58,687 INFO L225 Difference]: With dead ends: 21 [2020-10-13 10:59:58,687 INFO L226 Difference]: Without dead ends: 14 [2020-10-13 10:59:58,688 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-13 10:59:58,688 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2020-10-13 10:59:58,692 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2020-10-13 10:59:58,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2020-10-13 10:59:58,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 15 transitions. [2020-10-13 10:59:58,693 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 15 transitions. Word has length 10 [2020-10-13 10:59:58,693 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:59:58,693 INFO L479 AbstractCegarLoop]: Abstraction has 14 states and 15 transitions. [2020-10-13 10:59:58,693 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-13 10:59:58,693 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 15 transitions. [2020-10-13 10:59:58,694 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-13 10:59:58,694 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:59:58,694 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:59:58,694 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-13 10:59:58,695 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:59:58,695 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:59:58,695 INFO L82 PathProgramCache]: Analyzing trace with hash 1337256884, now seen corresponding path program 1 times [2020-10-13 10:59:58,695 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:59:58,696 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [839420483] [2020-10-13 10:59:58,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:59:58,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:59:58,712 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:59:58,753 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:59:58,754 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 20 [2020-10-13 10:59:58,754 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:59:58,754 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 47 [2020-10-13 10:59:58,754 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:59:58,754 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 10:59:58,755 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-13 10:59:58,755 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-13 10:59:58,755 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:59:58,805 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:59:58,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:59:58,809 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:59:58,811 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:59:58,811 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 10:59:58,811 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:59:58,811 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-13 10:59:58,811 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:59:58,812 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:59:58,812 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:59:58,812 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:59:58,812 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:59:58,817 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:59:58,818 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [839420483] [2020-10-13 10:59:58,818 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 10:59:58,818 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-13 10:59:58,819 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [124389439] [2020-10-13 10:59:58,819 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-13 10:59:58,819 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:59:58,820 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-13 10:59:58,820 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-13 10:59:58,820 INFO L87 Difference]: Start difference. First operand 14 states and 15 transitions. Second operand 3 states. [2020-10-13 10:59:58,849 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:59:58,849 INFO L93 Difference]: Finished difference Result 21 states and 23 transitions. [2020-10-13 10:59:58,851 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-13 10:59:58,851 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 12 [2020-10-13 10:59:58,851 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:59:58,852 INFO L225 Difference]: With dead ends: 21 [2020-10-13 10:59:58,852 INFO L226 Difference]: Without dead ends: 16 [2020-10-13 10:59:58,852 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-13 10:59:58,853 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2020-10-13 10:59:58,859 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 15. [2020-10-13 10:59:58,859 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2020-10-13 10:59:58,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 16 transitions. [2020-10-13 10:59:58,860 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 16 transitions. Word has length 12 [2020-10-13 10:59:58,862 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:59:58,862 INFO L479 AbstractCegarLoop]: Abstraction has 15 states and 16 transitions. [2020-10-13 10:59:58,862 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-13 10:59:58,862 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 16 transitions. [2020-10-13 10:59:58,863 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-13 10:59:58,863 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:59:58,863 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:59:58,863 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-13 10:59:58,863 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:59:58,864 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:59:58,864 INFO L82 PathProgramCache]: Analyzing trace with hash 2011681711, now seen corresponding path program 1 times [2020-10-13 10:59:58,865 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:59:58,866 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [410331381] [2020-10-13 10:59:58,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:59:58,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:59:58,888 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:59:58,958 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:59:59,060 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:59:59,151 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:59:59,151 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 22 [2020-10-13 10:59:59,152 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 10:59:59,152 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 269 [2020-10-13 10:59:59,152 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:59:59,152 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-13 10:59:59,152 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-13 10:59:59,153 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 4 [2020-10-13 10:59:59,153 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:59:59,212 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:59:59,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:59:59,214 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:59:59,215 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:59:59,215 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 10:59:59,215 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:59:59,215 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 10:59:59,216 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:59:59,216 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:59:59,216 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:59:59,216 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:59:59,217 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:59:59,219 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:59:59,219 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [410331381] [2020-10-13 10:59:59,220 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:59:59,220 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4] total 4 [2020-10-13 10:59:59,220 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1306843849] [2020-10-13 10:59:59,221 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-13 10:59:59,221 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:59:59,221 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-13 10:59:59,222 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-10-13 10:59:59,222 INFO L87 Difference]: Start difference. First operand 15 states and 16 transitions. Second operand 4 states. [2020-10-13 10:59:59,289 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:59:59,289 INFO L93 Difference]: Finished difference Result 23 states and 26 transitions. [2020-10-13 10:59:59,290 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-13 10:59:59,290 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 14 [2020-10-13 10:59:59,290 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:59:59,292 INFO L225 Difference]: With dead ends: 23 [2020-10-13 10:59:59,292 INFO L226 Difference]: Without dead ends: 18 [2020-10-13 10:59:59,293 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-10-13 10:59:59,293 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2020-10-13 10:59:59,298 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 17. [2020-10-13 10:59:59,298 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2020-10-13 10:59:59,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 19 transitions. [2020-10-13 10:59:59,299 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 19 transitions. Word has length 14 [2020-10-13 10:59:59,300 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:59:59,300 INFO L479 AbstractCegarLoop]: Abstraction has 17 states and 19 transitions. [2020-10-13 10:59:59,300 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-13 10:59:59,300 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 19 transitions. [2020-10-13 10:59:59,301 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-10-13 10:59:59,301 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:59:59,301 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:59:59,301 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-13 10:59:59,301 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:59:59,302 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:59:59,302 INFO L82 PathProgramCache]: Analyzing trace with hash 1593878762, now seen corresponding path program 2 times [2020-10-13 10:59:59,302 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:59:59,302 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [738987674] [2020-10-13 10:59:59,302 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:59:59,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:59:59,311 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:59:59,333 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:59:59,379 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:59:59,539 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:59:59,539 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 24 [2020-10-13 10:59:59,539 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 10:59:59,540 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 230 [2020-10-13 10:59:59,540 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:59:59,540 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-13 10:59:59,540 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-13 10:59:59,540 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 5 [2020-10-13 10:59:59,541 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:59:59,583 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:59:59,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:59:59,585 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:59:59,586 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:59:59,586 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 10:59:59,586 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:59:59,586 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 10:59:59,587 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:59:59,587 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:59:59,587 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:59:59,587 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:59:59,588 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:59:59,589 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-13 10:59:59,590 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [738987674] [2020-10-13 10:59:59,590 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:59:59,590 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4] total 4 [2020-10-13 10:59:59,591 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1758478812] [2020-10-13 10:59:59,591 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-13 10:59:59,592 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:59:59,592 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-13 10:59:59,592 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-10-13 10:59:59,592 INFO L87 Difference]: Start difference. First operand 17 states and 19 transitions. Second operand 4 states. [2020-10-13 10:59:59,617 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:59:59,618 INFO L93 Difference]: Finished difference Result 29 states and 34 transitions. [2020-10-13 10:59:59,618 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-13 10:59:59,618 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 16 [2020-10-13 10:59:59,619 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:59:59,619 INFO L225 Difference]: With dead ends: 29 [2020-10-13 10:59:59,619 INFO L226 Difference]: Without dead ends: 19 [2020-10-13 10:59:59,620 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-10-13 10:59:59,621 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2020-10-13 10:59:59,625 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2020-10-13 10:59:59,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2020-10-13 10:59:59,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 21 transitions. [2020-10-13 10:59:59,626 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 21 transitions. Word has length 16 [2020-10-13 10:59:59,626 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:59:59,626 INFO L479 AbstractCegarLoop]: Abstraction has 19 states and 21 transitions. [2020-10-13 10:59:59,626 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-13 10:59:59,627 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 21 transitions. [2020-10-13 10:59:59,627 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-10-13 10:59:59,627 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:59:59,627 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:59:59,628 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-13 10:59:59,628 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:59:59,628 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:59:59,628 INFO L82 PathProgramCache]: Analyzing trace with hash -89769689, now seen corresponding path program 3 times [2020-10-13 10:59:59,629 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:59:59,629 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1133139308] [2020-10-13 10:59:59,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:59:59,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:59:59,643 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:59:59,666 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:59:59,749 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:59:59,939 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:59:59,940 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 26 [2020-10-13 10:59:59,940 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 10:59:59,940 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 301 [2020-10-13 10:59:59,940 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:59:59,941 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-13 10:59:59,941 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-13 10:59:59,941 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-13 10:59:59,941 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:59:59,994 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:59:59,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:59:59,996 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:59:59,997 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:59:59,997 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 10:59:59,997 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:59:59,997 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 10:59:59,998 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:59:59,998 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:59:59,998 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:59:59,998 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:59:59,998 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:00:00,001 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 10 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-13 11:00:00,001 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1133139308] [2020-10-13 11:00:00,001 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 11:00:00,002 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-13 11:00:00,002 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [149906314] [2020-10-13 11:00:00,002 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-13 11:00:00,003 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 11:00:00,003 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-13 11:00:00,003 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-13 11:00:00,004 INFO L87 Difference]: Start difference. First operand 19 states and 21 transitions. Second operand 5 states. [2020-10-13 11:00:00,138 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 11:00:00,139 INFO L93 Difference]: Finished difference Result 29 states and 34 transitions. [2020-10-13 11:00:00,140 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-13 11:00:00,140 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 18 [2020-10-13 11:00:00,140 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 11:00:00,141 INFO L225 Difference]: With dead ends: 29 [2020-10-13 11:00:00,141 INFO L226 Difference]: Without dead ends: 24 [2020-10-13 11:00:00,142 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2020-10-13 11:00:00,142 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2020-10-13 11:00:00,147 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 21. [2020-10-13 11:00:00,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2020-10-13 11:00:00,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 24 transitions. [2020-10-13 11:00:00,148 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 24 transitions. Word has length 18 [2020-10-13 11:00:00,148 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 11:00:00,149 INFO L479 AbstractCegarLoop]: Abstraction has 21 states and 24 transitions. [2020-10-13 11:00:00,149 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-13 11:00:00,149 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 24 transitions. [2020-10-13 11:00:00,150 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-10-13 11:00:00,150 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 11:00:00,150 INFO L422 BasicCegarLoop]: trace histogram [5, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 11:00:00,150 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-13 11:00:00,150 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 11:00:00,151 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 11:00:00,151 INFO L82 PathProgramCache]: Analyzing trace with hash 733712482, now seen corresponding path program 4 times [2020-10-13 11:00:00,151 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 11:00:00,151 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1377905917] [2020-10-13 11:00:00,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 11:00:00,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:00:00,166 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:00:00,190 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:00:00,362 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:00:00,617 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:00:00,617 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 28 [2020-10-13 11:00:00,617 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 11:00:00,617 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 455 [2020-10-13 11:00:00,618 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:00:00,618 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-13 11:00:00,618 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-13 11:00:00,618 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-13 11:00:00,618 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:00:00,673 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 11:00:00,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:00:00,674 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:00:00,675 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:00:00,675 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 11:00:00,676 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 11:00:00,676 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 11:00:00,676 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:00:00,676 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 11:00:00,676 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 11:00:00,677 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 11:00:00,677 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:00:00,679 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 15 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-13 11:00:00,680 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1377905917] [2020-10-13 11:00:00,680 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 11:00:00,680 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-13 11:00:00,681 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1594298979] [2020-10-13 11:00:00,681 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-13 11:00:00,681 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 11:00:00,682 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-13 11:00:00,682 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-13 11:00:00,682 INFO L87 Difference]: Start difference. First operand 21 states and 24 transitions. Second operand 5 states. [2020-10-13 11:00:00,715 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 11:00:00,716 INFO L93 Difference]: Finished difference Result 35 states and 42 transitions. [2020-10-13 11:00:00,716 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-13 11:00:00,716 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 20 [2020-10-13 11:00:00,717 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 11:00:00,717 INFO L225 Difference]: With dead ends: 35 [2020-10-13 11:00:00,717 INFO L226 Difference]: Without dead ends: 23 [2020-10-13 11:00:00,718 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-13 11:00:00,719 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2020-10-13 11:00:00,723 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2020-10-13 11:00:00,724 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2020-10-13 11:00:00,724 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 26 transitions. [2020-10-13 11:00:00,725 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 26 transitions. Word has length 20 [2020-10-13 11:00:00,725 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 11:00:00,725 INFO L479 AbstractCegarLoop]: Abstraction has 23 states and 26 transitions. [2020-10-13 11:00:00,725 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-13 11:00:00,725 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 26 transitions. [2020-10-13 11:00:00,726 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-13 11:00:00,726 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 11:00:00,726 INFO L422 BasicCegarLoop]: trace histogram [6, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 11:00:00,727 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-13 11:00:00,727 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 11:00:00,727 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 11:00:00,727 INFO L82 PathProgramCache]: Analyzing trace with hash 1567930911, now seen corresponding path program 5 times [2020-10-13 11:00:00,728 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 11:00:00,728 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1009655644] [2020-10-13 11:00:00,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 11:00:00,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:00:00,743 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:00:00,772 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:00:00,906 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:00:01,300 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:00:01,301 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 30 [2020-10-13 11:00:01,301 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 11:00:01,301 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 563 [2020-10-13 11:00:01,302 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:00:01,302 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-13 11:00:01,302 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-10-13 11:00:01,302 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-13 11:00:01,302 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:00:01,431 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 11:00:01,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:00:01,433 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:00:01,433 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:00:01,434 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 11:00:01,434 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 11:00:01,434 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 11:00:01,434 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:00:01,435 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 11:00:01,435 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 11:00:01,435 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 11:00:01,435 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:00:01,438 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 21 proven. 9 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-10-13 11:00:01,438 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1009655644] [2020-10-13 11:00:01,439 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 11:00:01,439 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-13 11:00:01,439 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1093111008] [2020-10-13 11:00:01,440 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-13 11:00:01,440 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 11:00:01,440 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-13 11:00:01,441 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-13 11:00:01,441 INFO L87 Difference]: Start difference. First operand 23 states and 26 transitions. Second operand 6 states. [2020-10-13 11:00:03,854 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 11:00:03,854 INFO L93 Difference]: Finished difference Result 33 states and 39 transitions. [2020-10-13 11:00:03,855 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-13 11:00:03,855 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 22 [2020-10-13 11:00:03,855 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 11:00:03,856 INFO L225 Difference]: With dead ends: 33 [2020-10-13 11:00:03,856 INFO L226 Difference]: Without dead ends: 28 [2020-10-13 11:00:03,857 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2020-10-13 11:00:03,857 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2020-10-13 11:00:03,863 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 25. [2020-10-13 11:00:03,863 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2020-10-13 11:00:03,864 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 29 transitions. [2020-10-13 11:00:03,864 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 29 transitions. Word has length 22 [2020-10-13 11:00:03,864 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 11:00:03,864 INFO L479 AbstractCegarLoop]: Abstraction has 25 states and 29 transitions. [2020-10-13 11:00:03,865 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-13 11:00:03,865 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 29 transitions. [2020-10-13 11:00:03,865 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-13 11:00:03,865 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 11:00:03,866 INFO L422 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 11:00:03,866 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-13 11:00:03,866 INFO L427 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 11:00:03,866 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 11:00:03,867 INFO L82 PathProgramCache]: Analyzing trace with hash 351122266, now seen corresponding path program 6 times [2020-10-13 11:00:03,867 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 11:00:03,867 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1143376287] [2020-10-13 11:00:03,867 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 11:00:03,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:00:03,883 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:00:03,903 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:00:04,128 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:00:04,519 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:00:04,520 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 32 [2020-10-13 11:00:04,520 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 11:00:04,520 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 641 [2020-10-13 11:00:04,520 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:00:04,521 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-13 11:00:04,521 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-13 11:00:04,521 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 9 [2020-10-13 11:00:04,521 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:00:04,586 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 11:00:04,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:00:04,587 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:00:04,588 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:00:04,589 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 11:00:04,589 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 11:00:04,589 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 11:00:04,589 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:00:04,589 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 11:00:04,590 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 11:00:04,590 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 11:00:04,590 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:00:04,592 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 28 proven. 12 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-10-13 11:00:04,593 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1143376287] [2020-10-13 11:00:04,593 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 11:00:04,594 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-13 11:00:04,594 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [159155598] [2020-10-13 11:00:04,594 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-13 11:00:04,595 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 11:00:04,595 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-13 11:00:04,595 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-13 11:00:04,595 INFO L87 Difference]: Start difference. First operand 25 states and 29 transitions. Second operand 6 states. [2020-10-13 11:00:04,639 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 11:00:04,639 INFO L93 Difference]: Finished difference Result 41 states and 50 transitions. [2020-10-13 11:00:04,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-13 11:00:04,640 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 24 [2020-10-13 11:00:04,640 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 11:00:04,640 INFO L225 Difference]: With dead ends: 41 [2020-10-13 11:00:04,641 INFO L226 Difference]: Without dead ends: 27 [2020-10-13 11:00:04,641 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-13 11:00:04,642 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2020-10-13 11:00:04,646 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2020-10-13 11:00:04,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-10-13 11:00:04,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 31 transitions. [2020-10-13 11:00:04,648 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 31 transitions. Word has length 24 [2020-10-13 11:00:04,648 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 11:00:04,648 INFO L479 AbstractCegarLoop]: Abstraction has 27 states and 31 transitions. [2020-10-13 11:00:04,648 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-13 11:00:04,648 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 31 transitions. [2020-10-13 11:00:04,649 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-13 11:00:04,649 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 11:00:04,649 INFO L422 BasicCegarLoop]: trace histogram [8, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 11:00:04,650 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-13 11:00:04,650 INFO L427 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 11:00:04,650 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 11:00:04,650 INFO L82 PathProgramCache]: Analyzing trace with hash 240236183, now seen corresponding path program 7 times [2020-10-13 11:00:04,651 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 11:00:04,651 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [499422548] [2020-10-13 11:00:04,651 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 11:00:04,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:00:04,665 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:00:04,690 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:00:04,963 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:00:05,429 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:00:05,429 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 34 [2020-10-13 11:00:05,429 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 11:00:05,430 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 768 [2020-10-13 11:00:05,430 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:00:05,430 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-13 11:00:05,430 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 18 [2020-10-13 11:00:05,430 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-13 11:00:05,430 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:00:05,520 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 11:00:05,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:00:05,522 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:00:05,522 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:00:05,523 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 11:00:05,523 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 11:00:05,523 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 11:00:05,523 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:00:05,523 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 11:00:05,524 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 11:00:05,524 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 11:00:05,524 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:00:05,526 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 36 proven. 16 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-10-13 11:00:05,527 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [499422548] [2020-10-13 11:00:05,527 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 11:00:05,527 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-13 11:00:05,528 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [73192564] [2020-10-13 11:00:05,528 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-13 11:00:05,528 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 11:00:05,529 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-13 11:00:05,529 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-13 11:00:05,529 INFO L87 Difference]: Start difference. First operand 27 states and 31 transitions. Second operand 7 states. [2020-10-13 11:00:06,171 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 11:00:06,171 INFO L93 Difference]: Finished difference Result 37 states and 44 transitions. [2020-10-13 11:00:06,172 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-13 11:00:06,172 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 26 [2020-10-13 11:00:06,172 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 11:00:06,173 INFO L225 Difference]: With dead ends: 37 [2020-10-13 11:00:06,173 INFO L226 Difference]: Without dead ends: 32 [2020-10-13 11:00:06,174 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=36, Invalid=54, Unknown=0, NotChecked=0, Total=90 [2020-10-13 11:00:06,174 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2020-10-13 11:00:06,179 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 29. [2020-10-13 11:00:06,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2020-10-13 11:00:06,180 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 34 transitions. [2020-10-13 11:00:06,180 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 34 transitions. Word has length 26 [2020-10-13 11:00:06,181 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 11:00:06,181 INFO L479 AbstractCegarLoop]: Abstraction has 29 states and 34 transitions. [2020-10-13 11:00:06,181 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-13 11:00:06,181 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 34 transitions. [2020-10-13 11:00:06,182 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-13 11:00:06,182 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 11:00:06,182 INFO L422 BasicCegarLoop]: trace histogram [9, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 11:00:06,183 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-13 11:00:06,183 INFO L427 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 11:00:06,183 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 11:00:06,183 INFO L82 PathProgramCache]: Analyzing trace with hash 41775570, now seen corresponding path program 8 times [2020-10-13 11:00:06,184 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 11:00:06,184 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1625353125] [2020-10-13 11:00:06,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 11:00:06,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:00:06,199 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:00:06,218 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:00:06,551 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:00:07,161 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:00:07,161 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 36 [2020-10-13 11:00:07,161 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 11:00:07,162 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 967 [2020-10-13 11:00:07,162 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:00:07,162 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-13 11:00:07,162 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-13 11:00:07,178 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 11 [2020-10-13 11:00:07,178 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 16 [2020-10-13 11:00:07,253 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 11:00:07,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:00:07,258 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:00:07,259 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:00:07,259 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 11:00:07,259 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 11:00:07,259 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 11:00:07,260 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:00:07,260 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 11:00:07,261 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 11:00:07,262 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 11:00:07,262 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-13 11:00:07,264 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 45 proven. 20 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2020-10-13 11:00:07,265 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1625353125] [2020-10-13 11:00:07,265 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 11:00:07,266 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-13 11:00:07,266 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1787622095] [2020-10-13 11:00:07,267 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-13 11:00:07,267 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 11:00:07,267 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-13 11:00:07,267 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-13 11:00:07,268 INFO L87 Difference]: Start difference. First operand 29 states and 34 transitions. Second operand 7 states. [2020-10-13 11:00:07,330 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 11:00:07,331 INFO L93 Difference]: Finished difference Result 47 states and 58 transitions. [2020-10-13 11:00:07,332 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-13 11:00:07,332 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 28 [2020-10-13 11:00:07,332 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 11:00:07,333 INFO L225 Difference]: With dead ends: 47 [2020-10-13 11:00:07,333 INFO L226 Difference]: Without dead ends: 31 [2020-10-13 11:00:07,334 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-13 11:00:07,334 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2020-10-13 11:00:07,342 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2020-10-13 11:00:07,342 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2020-10-13 11:00:07,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 36 transitions. [2020-10-13 11:00:07,344 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 36 transitions. Word has length 28 [2020-10-13 11:00:07,345 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 11:00:07,345 INFO L479 AbstractCegarLoop]: Abstraction has 31 states and 36 transitions. [2020-10-13 11:00:07,345 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-13 11:00:07,345 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 36 transitions. [2020-10-13 11:00:07,348 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-10-13 11:00:07,349 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 11:00:07,349 INFO L422 BasicCegarLoop]: trace histogram [10, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 11:00:07,349 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-13 11:00:07,349 INFO L427 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 11:00:07,350 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 11:00:07,350 INFO L82 PathProgramCache]: Analyzing trace with hash -679244145, now seen corresponding path program 9 times [2020-10-13 11:00:07,350 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 11:00:07,350 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1236194792] [2020-10-13 11:00:07,351 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 11:00:07,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:00:07,367 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:00:07,398 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:00:07,847 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:00:08,389 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:00:08,389 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 38 [2020-10-13 11:00:08,389 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 11:00:08,390 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1026 [2020-10-13 11:00:08,390 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:00:08,390 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-13 11:00:08,390 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-13 11:00:08,391 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-13 11:00:08,391 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:00:08,542 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 11:00:08,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:00:08,543 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:00:08,545 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:00:08,545 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 11:00:08,545 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 11:00:08,546 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 11:00:08,546 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:00:08,546 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 11:00:08,546 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 11:00:08,546 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 11:00:08,547 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:00:08,552 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 55 proven. 25 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2020-10-13 11:00:08,552 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1236194792] [2020-10-13 11:00:08,552 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 11:00:08,553 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-13 11:00:08,553 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [678222814] [2020-10-13 11:00:08,554 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-13 11:00:08,554 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 11:00:08,554 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-13 11:00:08,555 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2020-10-13 11:00:08,555 INFO L87 Difference]: Start difference. First operand 31 states and 36 transitions. Second operand 8 states. [2020-10-13 11:00:20,151 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 11:00:20,151 INFO L93 Difference]: Finished difference Result 41 states and 49 transitions. [2020-10-13 11:00:20,156 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-13 11:00:20,156 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 30 [2020-10-13 11:00:20,157 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 11:00:20,157 INFO L225 Difference]: With dead ends: 41 [2020-10-13 11:00:20,158 INFO L226 Difference]: Without dead ends: 36 [2020-10-13 11:00:20,158 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 6 SyntacticMatches, 4 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 4.8s TimeCoverageRelationStatistics Valid=49, Invalid=82, Unknown=1, NotChecked=0, Total=132 [2020-10-13 11:00:20,159 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2020-10-13 11:00:20,164 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 33. [2020-10-13 11:00:20,164 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-10-13 11:00:20,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 39 transitions. [2020-10-13 11:00:20,165 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 39 transitions. Word has length 30 [2020-10-13 11:00:20,165 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 11:00:20,166 INFO L479 AbstractCegarLoop]: Abstraction has 33 states and 39 transitions. [2020-10-13 11:00:20,166 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-13 11:00:20,166 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 39 transitions. [2020-10-13 11:00:20,167 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-10-13 11:00:20,167 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 11:00:20,167 INFO L422 BasicCegarLoop]: trace histogram [11, 6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 11:00:20,167 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-13 11:00:20,167 INFO L427 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 11:00:20,168 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 11:00:20,168 INFO L82 PathProgramCache]: Analyzing trace with hash 1184443338, now seen corresponding path program 10 times [2020-10-13 11:00:20,168 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 11:00:20,168 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1416029299] [2020-10-13 11:00:20,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 11:00:20,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:00:20,183 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:00:20,220 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:00:20,752 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:00:21,421 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:00:21,421 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 40 [2020-10-13 11:00:21,421 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 11:00:21,422 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1243 [2020-10-13 11:00:21,430 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:00:21,431 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-13 11:00:21,431 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-13 11:00:21,431 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 13 [2020-10-13 11:00:21,431 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:00:21,513 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 11:00:21,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:00:21,515 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:00:21,516 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:00:21,516 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 11:00:21,517 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 11:00:21,517 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 11:00:21,517 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:00:21,517 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 11:00:21,517 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 11:00:21,518 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 11:00:21,518 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:00:21,520 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 66 proven. 30 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2020-10-13 11:00:21,521 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1416029299] [2020-10-13 11:00:21,521 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 11:00:21,521 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-13 11:00:21,521 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [708646928] [2020-10-13 11:00:21,523 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-13 11:00:21,523 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 11:00:21,524 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-13 11:00:21,524 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2020-10-13 11:00:21,524 INFO L87 Difference]: Start difference. First operand 33 states and 39 transitions. Second operand 8 states. [2020-10-13 11:00:21,591 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 11:00:21,591 INFO L93 Difference]: Finished difference Result 53 states and 66 transitions. [2020-10-13 11:00:21,592 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-13 11:00:21,592 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 32 [2020-10-13 11:00:21,593 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 11:00:21,593 INFO L225 Difference]: With dead ends: 53 [2020-10-13 11:00:21,593 INFO L226 Difference]: Without dead ends: 35 [2020-10-13 11:00:21,594 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2020-10-13 11:00:21,595 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2020-10-13 11:00:21,603 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2020-10-13 11:00:21,604 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2020-10-13 11:00:21,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 41 transitions. [2020-10-13 11:00:21,604 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 41 transitions. Word has length 32 [2020-10-13 11:00:21,605 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 11:00:21,605 INFO L479 AbstractCegarLoop]: Abstraction has 35 states and 41 transitions. [2020-10-13 11:00:21,605 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-13 11:00:21,605 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 41 transitions. [2020-10-13 11:00:21,607 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-10-13 11:00:21,608 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 11:00:21,608 INFO L422 BasicCegarLoop]: trace histogram [12, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 11:00:21,608 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-13 11:00:21,608 INFO L427 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 11:00:21,608 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 11:00:21,608 INFO L82 PathProgramCache]: Analyzing trace with hash -1114070521, now seen corresponding path program 11 times [2020-10-13 11:00:21,609 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 11:00:21,609 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1151641691] [2020-10-13 11:00:21,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 11:00:21,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:00:21,626 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:00:21,649 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:00:22,311 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:00:23,093 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:00:23,094 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 42 [2020-10-13 11:00:23,094 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 11:00:23,094 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1470 [2020-10-13 11:00:23,094 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:00:23,094 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-13 11:00:23,094 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 22 [2020-10-13 11:00:23,095 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-13 11:00:23,095 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:00:27,303 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 11:00:27,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:00:27,306 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:00:27,307 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:00:27,307 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 11:00:27,307 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 11:00:27,307 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 11:00:27,307 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:00:27,307 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 11:00:27,307 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 11:00:27,308 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 11:00:27,308 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:00:27,311 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 78 proven. 36 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2020-10-13 11:00:27,311 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1151641691] [2020-10-13 11:00:27,311 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 11:00:27,311 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-13 11:00:27,312 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1267854593] [2020-10-13 11:00:27,312 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-13 11:00:27,312 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 11:00:27,312 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-13 11:00:27,313 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=51, Unknown=2, NotChecked=0, Total=72 [2020-10-13 11:00:27,313 INFO L87 Difference]: Start difference. First operand 35 states and 41 transitions. Second operand 9 states. [2020-10-13 11:00:35,220 WARN L193 SmtUtils]: Spent 197.00 ms on a formula simplification. DAG size of input: 26 DAG size of output: 19 [2020-10-13 11:00:37,608 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 11:00:37,608 INFO L93 Difference]: Finished difference Result 45 states and 54 transitions. [2020-10-13 11:00:37,609 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-13 11:00:37,609 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 34 [2020-10-13 11:00:37,609 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 11:00:37,609 INFO L225 Difference]: With dead ends: 45 [2020-10-13 11:00:37,610 INFO L226 Difference]: Without dead ends: 40 [2020-10-13 11:00:37,610 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 9.5s TimeCoverageRelationStatistics Valid=64, Invalid=116, Unknown=2, NotChecked=0, Total=182 [2020-10-13 11:00:37,610 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2020-10-13 11:00:37,616 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 37. [2020-10-13 11:00:37,616 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2020-10-13 11:00:37,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 44 transitions. [2020-10-13 11:00:37,617 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 44 transitions. Word has length 34 [2020-10-13 11:00:37,617 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 11:00:37,617 INFO L479 AbstractCegarLoop]: Abstraction has 37 states and 44 transitions. [2020-10-13 11:00:37,617 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-13 11:00:37,617 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 44 transitions. [2020-10-13 11:00:37,618 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-10-13 11:00:37,618 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 11:00:37,618 INFO L422 BasicCegarLoop]: trace histogram [13, 7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 11:00:37,618 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-13 11:00:37,619 INFO L427 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 11:00:37,619 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 11:00:37,619 INFO L82 PathProgramCache]: Analyzing trace with hash -71876286, now seen corresponding path program 12 times [2020-10-13 11:00:37,619 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 11:00:37,619 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [348524561] [2020-10-13 11:00:37,619 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 11:00:37,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:00:37,631 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:00:37,657 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:00:38,229 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:00:39,248 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:00:39,249 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 44 [2020-10-13 11:00:39,249 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 11:00:39,249 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1621 [2020-10-13 11:00:39,249 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:00:39,250 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-13 11:00:39,250 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-13 11:00:39,250 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 15 [2020-10-13 11:00:39,250 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:00:39,356 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 11:00:39,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:00:39,357 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:00:39,358 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:00:39,358 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 11:00:39,358 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 11:00:39,359 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 11:00:39,359 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:00:39,359 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 11:00:39,359 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 11:00:39,359 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 11:00:39,360 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:00:39,362 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 91 proven. 42 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2020-10-13 11:00:39,363 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [348524561] [2020-10-13 11:00:39,364 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 11:00:39,364 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-13 11:00:39,364 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2047085847] [2020-10-13 11:00:39,365 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-13 11:00:39,365 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 11:00:39,365 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-13 11:00:39,366 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2020-10-13 11:00:39,366 INFO L87 Difference]: Start difference. First operand 37 states and 44 transitions. Second operand 9 states. [2020-10-13 11:00:39,441 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 11:00:39,441 INFO L93 Difference]: Finished difference Result 59 states and 74 transitions. [2020-10-13 11:00:39,442 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-13 11:00:39,442 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 36 [2020-10-13 11:00:39,442 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 11:00:39,443 INFO L225 Difference]: With dead ends: 59 [2020-10-13 11:00:39,443 INFO L226 Difference]: Without dead ends: 39 [2020-10-13 11:00:39,444 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2020-10-13 11:00:39,446 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2020-10-13 11:00:39,458 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2020-10-13 11:00:39,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2020-10-13 11:00:39,459 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 46 transitions. [2020-10-13 11:00:39,459 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 46 transitions. Word has length 36 [2020-10-13 11:00:39,460 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 11:00:39,460 INFO L479 AbstractCegarLoop]: Abstraction has 39 states and 46 transitions. [2020-10-13 11:00:39,460 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-13 11:00:39,460 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 46 transitions. [2020-10-13 11:00:39,461 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-10-13 11:00:39,461 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 11:00:39,463 INFO L422 BasicCegarLoop]: trace histogram [14, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 11:00:39,463 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-13 11:00:39,464 INFO L427 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 11:00:39,464 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 11:00:39,464 INFO L82 PathProgramCache]: Analyzing trace with hash 1567052031, now seen corresponding path program 13 times [2020-10-13 11:00:39,464 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 11:00:39,464 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [659764812] [2020-10-13 11:00:39,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 11:00:39,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:00:39,478 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:00:39,509 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:00:40,316 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:00:41,180 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:00:41,181 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 46 [2020-10-13 11:00:41,181 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 11:00:41,181 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1705 [2020-10-13 11:00:41,181 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:00:41,181 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-13 11:00:41,182 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 24 [2020-10-13 11:00:41,182 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-13 11:00:41,182 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:00:41,400 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 11:00:41,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:00:41,402 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:00:41,402 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:00:41,403 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 11:00:41,403 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 11:00:41,403 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 11:00:41,403 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:00:41,404 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 11:00:41,404 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 11:00:41,404 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 11:00:41,404 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:00:41,409 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 105 proven. 49 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2020-10-13 11:00:41,410 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [659764812] [2020-10-13 11:00:41,410 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 11:00:41,410 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-13 11:00:41,410 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [772073145] [2020-10-13 11:00:41,411 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-13 11:00:41,411 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 11:00:41,411 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-13 11:00:41,411 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2020-10-13 11:00:41,412 INFO L87 Difference]: Start difference. First operand 39 states and 46 transitions. Second operand 10 states. [2020-10-13 11:00:45,963 WARN L193 SmtUtils]: Spent 2.21 s on a formula simplification. DAG size of input: 47 DAG size of output: 19 [2020-10-13 11:00:52,325 WARN L193 SmtUtils]: Spent 5.91 s on a formula simplification. DAG size of input: 54 DAG size of output: 19 [2020-10-13 11:01:13,225 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 11:01:13,226 INFO L93 Difference]: Finished difference Result 55 states and 68 transitions. [2020-10-13 11:01:13,226 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-13 11:01:13,226 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 38 [2020-10-13 11:01:13,227 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 11:01:13,227 INFO L225 Difference]: With dead ends: 55 [2020-10-13 11:01:13,227 INFO L226 Difference]: Without dead ends: 50 [2020-10-13 11:01:13,228 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 10 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 11.6s TimeCoverageRelationStatistics Valid=115, Invalid=227, Unknown=0, NotChecked=0, Total=342 [2020-10-13 11:01:13,228 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2020-10-13 11:01:13,234 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 41. [2020-10-13 11:01:13,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2020-10-13 11:01:13,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 49 transitions. [2020-10-13 11:01:13,235 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 49 transitions. Word has length 38 [2020-10-13 11:01:13,235 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 11:01:13,235 INFO L479 AbstractCegarLoop]: Abstraction has 41 states and 49 transitions. [2020-10-13 11:01:13,236 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-13 11:01:13,236 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 49 transitions. [2020-10-13 11:01:13,236 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-10-13 11:01:13,236 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 11:01:13,236 INFO L422 BasicCegarLoop]: trace histogram [15, 8, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 11:01:13,237 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-13 11:01:13,237 INFO L427 AbstractCegarLoop]: === Iteration 17 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 11:01:13,237 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 11:01:13,237 INFO L82 PathProgramCache]: Analyzing trace with hash -493481414, now seen corresponding path program 14 times [2020-10-13 11:01:13,237 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 11:01:13,238 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [927873983] [2020-10-13 11:01:13,238 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 11:01:13,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:01:13,248 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:01:13,280 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:01:13,976 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:01:15,202 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:01:15,202 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 48 [2020-10-13 11:01:15,202 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 11:01:15,203 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1957 [2020-10-13 11:01:15,203 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:01:15,203 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-13 11:01:15,203 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-13 11:01:15,204 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-10-13 11:01:15,204 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 11:01:15,380 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 11:01:15,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:01:15,381 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:01:15,382 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:01:15,382 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 11:01:15,383 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 11:01:15,383 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 11:01:15,384 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:01:15,384 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 11:01:15,384 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 11:01:15,385 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 11:01:15,385 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 11:01:15,390 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 120 proven. 56 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2020-10-13 11:01:15,391 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [927873983] [2020-10-13 11:01:15,391 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 11:01:15,391 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-13 11:01:15,392 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1208862788] [2020-10-13 11:01:15,393 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-13 11:01:15,393 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 11:01:15,394 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-13 11:01:15,395 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2020-10-13 11:01:15,395 INFO L87 Difference]: Start difference. First operand 41 states and 49 transitions. Second operand 10 states. [2020-10-13 11:01:15,552 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 11:01:15,552 INFO L93 Difference]: Finished difference Result 65 states and 82 transitions. [2020-10-13 11:01:15,554 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-13 11:01:15,554 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 40 [2020-10-13 11:01:15,555 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 11:01:15,555 INFO L225 Difference]: With dead ends: 65 [2020-10-13 11:01:15,555 INFO L226 Difference]: Without dead ends: 43 [2020-10-13 11:01:15,556 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2020-10-13 11:01:15,557 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2020-10-13 11:01:15,567 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2020-10-13 11:01:15,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2020-10-13 11:01:15,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 51 transitions. [2020-10-13 11:01:15,570 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 51 transitions. Word has length 40 [2020-10-13 11:01:15,570 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 11:01:15,570 INFO L479 AbstractCegarLoop]: Abstraction has 43 states and 51 transitions. [2020-10-13 11:01:15,570 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-13 11:01:15,571 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 51 transitions. [2020-10-13 11:01:15,572 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-10-13 11:01:15,572 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 11:01:15,572 INFO L422 BasicCegarLoop]: trace histogram [16, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 11:01:15,573 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-13 11:01:15,573 INFO L427 AbstractCegarLoop]: === Iteration 18 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 11:01:15,573 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 11:01:15,574 INFO L82 PathProgramCache]: Analyzing trace with hash -905053321, now seen corresponding path program 15 times [2020-10-13 11:01:15,574 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 11:01:15,579 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [42635579] [2020-10-13 11:01:15,579 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 11:01:15,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:01:15,597 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:01:15,649 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:01:16,678 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:01:18,161 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:01:18,162 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 50 [2020-10-13 11:01:18,162 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 11:01:18,163 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2569 [2020-10-13 11:01:18,163 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:01:18,163 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-13 11:01:18,164 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 26 [2020-10-13 11:01:18,164 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-13 11:01:18,164 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 11:01:20,520 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 11:01:20,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:01:20,522 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:01:20,522 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:01:20,522 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 11:01:20,523 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 11:01:20,523 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 11:01:20,523 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:01:20,523 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 11:01:20,523 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 11:01:20,523 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 11:01:20,524 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:01:20,527 INFO L134 CoverageAnalysis]: Checked inductivity of 256 backedges. 136 proven. 64 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2020-10-13 11:01:20,528 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [42635579] [2020-10-13 11:01:20,528 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 11:01:20,528 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-13 11:01:20,528 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1901365456] [2020-10-13 11:01:20,529 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-13 11:01:20,529 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 11:01:20,529 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-13 11:01:20,529 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=83, Unknown=1, NotChecked=0, Total=110 [2020-10-13 11:01:20,529 INFO L87 Difference]: Start difference. First operand 43 states and 51 transitions. Second operand 11 states. [2020-10-13 11:01:25,532 WARN L193 SmtUtils]: Spent 2.14 s on a formula simplification. DAG size of input: 47 DAG size of output: 19 [2020-10-13 11:01:36,472 WARN L193 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 19 [2020-10-13 11:01:42,404 WARN L193 SmtUtils]: Spent 3.32 s on a formula simplification. DAG size of input: 40 DAG size of output: 19 [2020-10-13 11:01:47,421 WARN L193 SmtUtils]: Spent 550.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 19 [2020-10-13 11:01:51,501 WARN L193 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 19 [2020-10-13 11:01:53,934 WARN L193 SmtUtils]: Spent 224.00 ms on a formula simplification. DAG size of input: 26 DAG size of output: 19 [2020-10-13 11:02:01,629 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 11:02:01,629 INFO L93 Difference]: Finished difference Result 56 states and 68 transitions. [2020-10-13 11:02:01,630 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-13 11:02:01,630 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 42 [2020-10-13 11:02:01,630 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 11:02:01,631 INFO L225 Difference]: With dead ends: 56 [2020-10-13 11:02:01,631 INFO L226 Difference]: Without dead ends: 51 [2020-10-13 11:02:01,631 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 9 SyntacticMatches, 4 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 23.0s TimeCoverageRelationStatistics Valid=131, Invalid=246, Unknown=3, NotChecked=0, Total=380 [2020-10-13 11:02:01,632 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2020-10-13 11:02:01,639 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 45. [2020-10-13 11:02:01,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-10-13 11:02:01,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 54 transitions. [2020-10-13 11:02:01,640 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 54 transitions. Word has length 42 [2020-10-13 11:02:01,640 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 11:02:01,640 INFO L479 AbstractCegarLoop]: Abstraction has 45 states and 54 transitions. [2020-10-13 11:02:01,640 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-13 11:02:01,640 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 54 transitions. [2020-10-13 11:02:01,641 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2020-10-13 11:02:01,641 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 11:02:01,641 INFO L422 BasicCegarLoop]: trace histogram [17, 9, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 11:02:01,641 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-13 11:02:01,642 INFO L427 AbstractCegarLoop]: === Iteration 19 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 11:02:01,642 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 11:02:01,642 INFO L82 PathProgramCache]: Analyzing trace with hash -1069809998, now seen corresponding path program 16 times [2020-10-13 11:02:01,642 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 11:02:01,642 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [996747448] [2020-10-13 11:02:01,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 11:02:01,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:02:01,652 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:02:01,682 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:02:02,647 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:02:04,014 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:02:04,014 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 52 [2020-10-13 11:02:04,014 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 11:02:04,015 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2365 [2020-10-13 11:02:04,015 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:02:04,015 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-13 11:02:04,016 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-13 11:02:04,016 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 19 [2020-10-13 11:02:04,016 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 11:02:04,189 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 11:02:04,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:02:04,190 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:02:04,191 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:02:04,191 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 11:02:04,192 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 11:02:04,192 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 11:02:04,192 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:02:04,192 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 11:02:04,193 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 11:02:04,193 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 11:02:04,198 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 5 [2020-10-13 11:02:04,201 INFO L134 CoverageAnalysis]: Checked inductivity of 289 backedges. 153 proven. 72 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2020-10-13 11:02:04,202 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [996747448] [2020-10-13 11:02:04,202 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 11:02:04,202 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-13 11:02:04,203 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [303656701] [2020-10-13 11:02:04,205 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-13 11:02:04,206 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 11:02:04,206 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-13 11:02:04,207 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2020-10-13 11:02:04,207 INFO L87 Difference]: Start difference. First operand 45 states and 54 transitions. Second operand 11 states. [2020-10-13 11:02:04,341 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 11:02:04,342 INFO L93 Difference]: Finished difference Result 71 states and 90 transitions. [2020-10-13 11:02:04,342 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-13 11:02:04,342 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 44 [2020-10-13 11:02:04,342 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 11:02:04,343 INFO L225 Difference]: With dead ends: 71 [2020-10-13 11:02:04,343 INFO L226 Difference]: Without dead ends: 47 [2020-10-13 11:02:04,344 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2020-10-13 11:02:04,344 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2020-10-13 11:02:04,352 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2020-10-13 11:02:04,352 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2020-10-13 11:02:04,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 56 transitions. [2020-10-13 11:02:04,353 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 56 transitions. Word has length 44 [2020-10-13 11:02:04,353 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 11:02:04,353 INFO L479 AbstractCegarLoop]: Abstraction has 47 states and 56 transitions. [2020-10-13 11:02:04,354 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-13 11:02:04,354 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 56 transitions. [2020-10-13 11:02:04,354 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-10-13 11:02:04,355 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 11:02:04,355 INFO L422 BasicCegarLoop]: trace histogram [18, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 11:02:04,355 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-13 11:02:04,355 INFO L427 AbstractCegarLoop]: === Iteration 20 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 11:02:04,355 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 11:02:04,356 INFO L82 PathProgramCache]: Analyzing trace with hash -353173137, now seen corresponding path program 17 times [2020-10-13 11:02:04,356 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 11:02:04,356 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1045945974] [2020-10-13 11:02:04,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 11:02:04,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:02:04,366 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:02:04,398 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:02:04,954 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:02:06,992 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:02:06,992 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 54 [2020-10-13 11:02:06,992 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 11:02:06,992 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2629 [2020-10-13 11:02:06,993 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:02:06,993 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-13 11:02:06,993 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 28 [2020-10-13 11:02:06,993 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-13 11:02:06,993 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:02:07,308 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 11:02:07,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:02:07,309 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:02:07,309 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:02:07,310 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 11:02:07,310 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 11:02:07,310 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 11:02:07,310 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:02:07,310 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 11:02:07,311 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 11:02:07,311 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 11:02:07,311 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:02:07,320 INFO L134 CoverageAnalysis]: Checked inductivity of 324 backedges. 171 proven. 81 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2020-10-13 11:02:07,320 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1045945974] [2020-10-13 11:02:07,320 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 11:02:07,320 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-13 11:02:07,321 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1023737613] [2020-10-13 11:02:07,322 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-13 11:02:07,322 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 11:02:07,322 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-13 11:02:07,322 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2020-10-13 11:02:07,323 INFO L87 Difference]: Start difference. First operand 47 states and 56 transitions. Second operand 12 states. [2020-10-13 11:02:10,155 WARN L193 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 17 [2020-10-13 11:02:16,636 WARN L193 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 17 [2020-10-13 11:02:21,835 WARN L193 SmtUtils]: Spent 2.15 s on a formula simplification. DAG size of input: 45 DAG size of output: 17 [2020-10-13 11:02:23,417 WARN L193 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 17 [2020-10-13 11:02:40,913 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 11:02:40,913 INFO L93 Difference]: Finished difference Result 59 states and 72 transitions. [2020-10-13 11:02:40,914 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-13 11:02:40,914 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 46 [2020-10-13 11:02:40,914 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 11:02:40,915 INFO L225 Difference]: With dead ends: 59 [2020-10-13 11:02:40,915 INFO L226 Difference]: Without dead ends: 54 [2020-10-13 11:02:40,916 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 10 SyntacticMatches, 5 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 16.9s TimeCoverageRelationStatistics Valid=138, Invalid=282, Unknown=0, NotChecked=0, Total=420 [2020-10-13 11:02:40,916 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-10-13 11:02:40,923 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 49. [2020-10-13 11:02:40,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2020-10-13 11:02:40,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 59 transitions. [2020-10-13 11:02:40,923 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 59 transitions. Word has length 46 [2020-10-13 11:02:40,924 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 11:02:40,924 INFO L479 AbstractCegarLoop]: Abstraction has 49 states and 59 transitions. [2020-10-13 11:02:40,924 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-13 11:02:40,924 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 59 transitions. [2020-10-13 11:02:40,924 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-10-13 11:02:40,929 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 11:02:40,929 INFO L422 BasicCegarLoop]: trace histogram [19, 10, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 11:02:40,930 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-10-13 11:02:40,930 INFO L427 AbstractCegarLoop]: === Iteration 21 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 11:02:40,930 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 11:02:40,930 INFO L82 PathProgramCache]: Analyzing trace with hash 1006069418, now seen corresponding path program 18 times [2020-10-13 11:02:40,930 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 11:02:40,930 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [411207258] [2020-10-13 11:02:40,931 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 11:02:40,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:02:40,940 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:02:41,012 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:02:41,690 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:02:42,817 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:02:42,818 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 56 [2020-10-13 11:02:42,818 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 11:02:42,818 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1880 [2020-10-13 11:02:42,818 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:02:42,818 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-13 11:02:42,818 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-13 11:02:42,818 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 21 [2020-10-13 11:02:42,819 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:02:42,959 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 11:02:42,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:02:42,961 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:02:42,961 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:02:42,962 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 11:02:42,962 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 11:02:42,962 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 11:02:42,962 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:02:42,963 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 11:02:42,963 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 11:02:42,963 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 11:02:42,963 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:02:42,966 INFO L134 CoverageAnalysis]: Checked inductivity of 361 backedges. 190 proven. 90 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2020-10-13 11:02:42,967 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [411207258] [2020-10-13 11:02:42,967 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 11:02:42,967 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-13 11:02:42,967 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [669726203] [2020-10-13 11:02:42,968 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-13 11:02:42,968 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 11:02:42,968 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-13 11:02:42,969 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2020-10-13 11:02:42,969 INFO L87 Difference]: Start difference. First operand 49 states and 59 transitions. Second operand 12 states. [2020-10-13 11:02:43,148 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 11:02:43,148 INFO L93 Difference]: Finished difference Result 77 states and 98 transitions. [2020-10-13 11:02:43,149 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-13 11:02:43,149 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 48 [2020-10-13 11:02:43,149 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 11:02:43,150 INFO L225 Difference]: With dead ends: 77 [2020-10-13 11:02:43,150 INFO L226 Difference]: Without dead ends: 51 [2020-10-13 11:02:43,151 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2020-10-13 11:02:43,151 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2020-10-13 11:02:43,159 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2020-10-13 11:02:43,159 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-10-13 11:02:43,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 61 transitions. [2020-10-13 11:02:43,160 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 61 transitions. Word has length 48 [2020-10-13 11:02:43,160 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 11:02:43,160 INFO L479 AbstractCegarLoop]: Abstraction has 51 states and 61 transitions. [2020-10-13 11:02:43,160 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-13 11:02:43,160 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 61 transitions. [2020-10-13 11:02:43,161 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2020-10-13 11:02:43,161 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 11:02:43,164 INFO L422 BasicCegarLoop]: trace histogram [20, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 11:02:43,164 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-10-13 11:02:43,165 INFO L427 AbstractCegarLoop]: === Iteration 22 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 11:02:43,165 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 11:02:43,165 INFO L82 PathProgramCache]: Analyzing trace with hash 1506067175, now seen corresponding path program 19 times [2020-10-13 11:02:43,165 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 11:02:43,165 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [685660202] [2020-10-13 11:02:43,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 11:02:43,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:02:43,185 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:02:43,216 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:02:43,950 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:02:45,480 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:02:45,480 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 58 [2020-10-13 11:02:45,480 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 11:02:45,480 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2299 [2020-10-13 11:02:45,480 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:02:45,481 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-13 11:02:45,481 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 30 [2020-10-13 11:02:45,481 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-13 11:02:45,481 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:02:45,746 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 11:02:45,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:02:45,747 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:02:45,748 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:02:45,748 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 11:02:45,748 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 11:02:45,748 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 11:02:45,748 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:02:45,749 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 11:02:45,749 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 11:02:45,749 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 11:02:45,749 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:02:45,752 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 210 proven. 100 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2020-10-13 11:02:45,753 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [685660202] [2020-10-13 11:02:45,753 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 11:02:45,753 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-13 11:02:45,753 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1726393996] [2020-10-13 11:02:45,754 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-13 11:02:45,754 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 11:02:45,754 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-13 11:02:45,754 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2020-10-13 11:02:45,754 INFO L87 Difference]: Start difference. First operand 51 states and 61 transitions. Second operand 13 states. [2020-10-13 11:02:46,386 WARN L193 SmtUtils]: Spent 334.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 17 [2020-10-13 11:02:46,993 WARN L193 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 17 [2020-10-13 11:02:50,001 WARN L193 SmtUtils]: Spent 2.21 s on a formula simplification. DAG size of input: 59 DAG size of output: 17 [2020-10-13 11:02:53,964 WARN L193 SmtUtils]: Spent 617.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 17 [2020-10-13 11:02:58,964 WARN L838 $PredicateComparison]: unable to prove that (and (<= c_main_~x~0 (+ (* 4294967296 (div (+ c_main_~x~0 (- 13)) 4294967296)) 10000012)) (<= c_main_~x~0 (+ (* 4294967296 (div (+ c_main_~x~0 (- 11)) 4294967296)) 10000010)) (<= c_main_~x~0 (+ (* 4294967296 (div (+ c_main_~x~0 (- 3)) 4294967296)) 10000002)) (<= c_main_~x~0 (+ (* 4294967296 (div (+ c_main_~x~0 (- 1)) 4294967296)) 10000000)) (<= c_main_~x~0 (+ (* 4294967296 (div (+ c_main_~x~0 (- 9)) 4294967296)) 10000008)) (<= c_main_~x~0 (+ (* 4294967296 (div (+ c_main_~x~0 (- 17)) 4294967296)) 10000016)) (<= c_main_~x~0 (+ (* 4294967296 (div (+ c_main_~x~0 (- 7)) 4294967296)) 10000006)) (<= c_main_~x~0 (+ (* 4294967296 (div (+ c_main_~x~0 (- 19)) 4294967296)) 10000018)) (<= c_main_~x~0 (+ (* 4294967296 (div (+ c_main_~x~0 (- 15)) 4294967296)) 10000014))) is different from false [2020-10-13 11:03:00,287 WARN L193 SmtUtils]: Spent 810.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 17 [2020-10-13 11:03:05,657 WARN L193 SmtUtils]: Spent 3.76 s on a formula simplification. DAG size of input: 38 DAG size of output: 17 [2020-10-13 11:03:10,660 WARN L193 SmtUtils]: Spent 240.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 17 [2020-10-13 11:03:22,486 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 11:03:22,487 INFO L93 Difference]: Finished difference Result 64 states and 78 transitions. [2020-10-13 11:03:22,487 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-13 11:03:22,487 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 50 [2020-10-13 11:03:22,488 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 11:03:22,488 INFO L225 Difference]: With dead ends: 64 [2020-10-13 11:03:22,488 INFO L226 Difference]: Without dead ends: 59 [2020-10-13 11:03:22,489 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 21.0s TimeCoverageRelationStatistics Valid=172, Invalid=334, Unknown=4, NotChecked=42, Total=552 [2020-10-13 11:03:22,489 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2020-10-13 11:03:22,497 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 53. [2020-10-13 11:03:22,497 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2020-10-13 11:03:22,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 64 transitions. [2020-10-13 11:03:22,498 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 64 transitions. Word has length 50 [2020-10-13 11:03:22,498 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 11:03:22,498 INFO L479 AbstractCegarLoop]: Abstraction has 53 states and 64 transitions. [2020-10-13 11:03:22,498 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-13 11:03:22,498 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 64 transitions. [2020-10-13 11:03:22,499 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-10-13 11:03:22,499 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 11:03:22,499 INFO L422 BasicCegarLoop]: trace histogram [21, 11, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 11:03:22,499 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-10-13 11:03:22,499 INFO L427 AbstractCegarLoop]: === Iteration 23 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 11:03:22,500 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 11:03:22,500 INFO L82 PathProgramCache]: Analyzing trace with hash 1029614114, now seen corresponding path program 20 times [2020-10-13 11:03:22,500 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 11:03:22,500 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [623392734] [2020-10-13 11:03:22,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 11:03:22,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:03:22,516 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:03:22,549 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:03:23,512 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:03:25,470 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:03:25,471 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 60 [2020-10-13 11:03:25,471 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 11:03:25,471 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2959 [2020-10-13 11:03:25,471 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:03:25,471 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-13 11:03:25,471 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-13 11:03:25,471 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-10-13 11:03:25,471 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:03:25,680 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 11:03:25,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:03:25,681 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:03:25,682 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:03:25,682 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 11:03:25,682 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 11:03:25,682 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 11:03:25,682 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:03:25,683 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 11:03:25,683 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 11:03:25,683 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 11:03:25,683 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:03:25,686 INFO L134 CoverageAnalysis]: Checked inductivity of 441 backedges. 231 proven. 110 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2020-10-13 11:03:25,686 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [623392734] [2020-10-13 11:03:25,687 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 11:03:25,687 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-13 11:03:25,687 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1573417101] [2020-10-13 11:03:25,687 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-13 11:03:25,687 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 11:03:25,687 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-13 11:03:25,688 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2020-10-13 11:03:25,688 INFO L87 Difference]: Start difference. First operand 53 states and 64 transitions. Second operand 13 states. [2020-10-13 11:03:25,906 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 11:03:25,906 INFO L93 Difference]: Finished difference Result 83 states and 106 transitions. [2020-10-13 11:03:25,907 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-13 11:03:25,907 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 52 [2020-10-13 11:03:25,907 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 11:03:25,908 INFO L225 Difference]: With dead ends: 83 [2020-10-13 11:03:25,908 INFO L226 Difference]: Without dead ends: 55 [2020-10-13 11:03:25,909 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2020-10-13 11:03:25,909 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2020-10-13 11:03:25,915 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 55. [2020-10-13 11:03:25,916 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2020-10-13 11:03:25,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 66 transitions. [2020-10-13 11:03:25,916 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 66 transitions. Word has length 52 [2020-10-13 11:03:25,916 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 11:03:25,917 INFO L479 AbstractCegarLoop]: Abstraction has 55 states and 66 transitions. [2020-10-13 11:03:25,917 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-13 11:03:25,917 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 66 transitions. [2020-10-13 11:03:25,917 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-10-13 11:03:25,917 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 11:03:25,917 INFO L422 BasicCegarLoop]: trace histogram [22, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 11:03:25,918 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-10-13 11:03:25,918 INFO L427 AbstractCegarLoop]: === Iteration 24 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 11:03:25,918 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 11:03:25,918 INFO L82 PathProgramCache]: Analyzing trace with hash -1065771041, now seen corresponding path program 21 times [2020-10-13 11:03:25,918 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 11:03:25,918 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [705507574] [2020-10-13 11:03:25,918 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 11:03:25,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:03:25,931 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:03:25,966 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:03:27,051 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:03:28,918 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:03:28,918 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 62 [2020-10-13 11:03:28,918 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 11:03:28,918 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2991 [2020-10-13 11:03:28,918 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:03:28,918 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-13 11:03:28,919 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 32 [2020-10-13 11:03:28,919 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-10-13 11:03:28,919 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:03:31,311 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 11:03:31,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:03:31,313 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:03:31,313 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:03:31,313 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 11:03:31,314 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 11:03:31,314 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 11:03:31,314 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:03:31,314 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 11:03:31,314 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 11:03:31,314 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 11:03:31,314 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:03:31,318 INFO L134 CoverageAnalysis]: Checked inductivity of 484 backedges. 253 proven. 119 refuted. 2 times theorem prover too weak. 110 trivial. 0 not checked. [2020-10-13 11:03:31,319 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [705507574] [2020-10-13 11:03:31,319 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 11:03:31,319 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-13 11:03:31,319 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [886506932] [2020-10-13 11:03:31,319 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-13 11:03:31,319 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 11:03:31,320 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-13 11:03:31,320 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=145, Unknown=1, NotChecked=0, Total=182 [2020-10-13 11:03:31,320 INFO L87 Difference]: Start difference. First operand 55 states and 66 transitions. Second operand 14 states. [2020-10-13 11:03:33,681 WARN L838 $PredicateComparison]: unable to prove that (and (<= c_main_~x~0 (+ (* 4294967296 (div (+ c_main_~x~0 (- 5)) 4294967296)) 10000004)) (<= c_main_~x~0 (+ (* 4294967296 (div (+ c_main_~x~0 (- 13)) 4294967296)) 10000012)) (<= c_main_~x~0 (+ (* 4294967296 (div (+ c_main_~x~0 (- 11)) 4294967296)) 10000010)) (<= c_main_~x~0 (+ (* 4294967296 (div (+ c_main_~x~0 (- 3)) 4294967296)) 10000002)) (<= c_main_~x~0 (+ (* 4294967296 (div (+ c_main_~x~0 (- 9)) 4294967296)) 10000008)) (<= c_main_~x~0 (+ (* 4294967296 (div (+ c_main_~x~0 (- 17)) 4294967296)) 10000016)) (<= c_main_~x~0 (+ (* 4294967296 (div (+ c_main_~x~0 (- 7)) 4294967296)) 10000006)) (<= c_main_~x~0 (+ (* 4294967296 (div (+ c_main_~x~0 (- 21)) 4294967296)) 10000020)) (<= c_main_~x~0 (+ (* 4294967296 (div (+ c_main_~x~0 (- 19)) 4294967296)) 10000018)) (<= c_main_~x~0 (+ (* 4294967296 (div (+ c_main_~x~0 (- 15)) 4294967296)) 10000014))) is different from false [2020-10-13 11:03:36,190 WARN L193 SmtUtils]: Spent 506.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 17 [2020-10-13 11:03:40,755 WARN L193 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 17 [2020-10-13 11:03:42,949 WARN L193 SmtUtils]: Spent 1.83 s on a formula simplification. DAG size of input: 59 DAG size of output: 17 [2020-10-13 11:03:53,719 WARN L193 SmtUtils]: Spent 278.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 17 [2020-10-13 11:03:57,713 WARN L193 SmtUtils]: Spent 2.16 s on a formula simplification. DAG size of input: 52 DAG size of output: 17 [2020-10-13 11:04:03,374 WARN L193 SmtUtils]: Spent 2.16 s on a formula simplification. DAG size of input: 45 DAG size of output: 17