/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 SingleStatement --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=SHALLOWEST --traceabstraction.additional.smt.options log-additional-information=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/loop-lit/afnp2014.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-c90d42b [2020-09-25 00:05:36,061 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-25 00:05:36,064 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-25 00:05:36,091 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-25 00:05:36,092 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-25 00:05:36,093 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-25 00:05:36,095 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-25 00:05:36,097 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-25 00:05:36,099 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-25 00:05:36,100 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-25 00:05:36,101 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-25 00:05:36,102 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-25 00:05:36,102 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-25 00:05:36,104 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-25 00:05:36,106 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-25 00:05:36,108 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-25 00:05:36,109 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-25 00:05:36,111 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-25 00:05:36,115 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-25 00:05:36,117 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-25 00:05:36,122 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-25 00:05:36,123 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-25 00:05:36,126 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-25 00:05:36,127 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-25 00:05:36,133 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-09-25 00:05:36,133 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-09-25 00:05:36,133 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-09-25 00:05:36,138 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-09-25 00:05:36,139 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-09-25 00:05:36,141 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-09-25 00:05:36,141 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-09-25 00:05:36,142 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-09-25 00:05:36,143 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-09-25 00:05:36,143 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-09-25 00:05:36,145 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-09-25 00:05:36,145 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-09-25 00:05:36,146 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-09-25 00:05:36,146 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-09-25 00:05:36,146 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-25 00:05:36,157 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-25 00:05:36,158 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-25 00:05:36,164 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 [2020-09-25 00:05:36,218 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-25 00:05:36,218 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-25 00:05:36,219 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-09-25 00:05:36,220 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-09-25 00:05:36,220 INFO L138 SettingsManager]: * Use SBE=true [2020-09-25 00:05:36,220 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-25 00:05:36,220 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-25 00:05:36,221 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-25 00:05:36,221 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-25 00:05:36,221 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-25 00:05:36,221 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-25 00:05:36,221 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-25 00:05:36,222 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-25 00:05:36,222 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-25 00:05:36,222 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-25 00:05:36,222 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-25 00:05:36,222 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-25 00:05:36,223 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-25 00:05:36,223 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-09-25 00:05:36,223 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-25 00:05:36,223 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-25 00:05:36,224 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-25 00:05:36,224 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-25 00:05:36,224 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-09-25 00:05:36,224 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-09-25 00:05:36,224 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-09-25 00:05:36,225 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-09-25 00:05:36,225 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-25 00:05:36,225 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-09-25 00:05:36,225 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 -> SingleStatement 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=SHALLOWEST;log-additional-information=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=SHALLOWEST;log-additional-information=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=SHALLOWEST;log-additional-information=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=SHALLOWEST;log-additional-information=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=SHALLOWEST;log-additional-information=true; [2020-09-25 00:05:36,729 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-25 00:05:36,759 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-25 00:05:36,764 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-25 00:05:36,767 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-25 00:05:36,768 INFO L275 PluginConnector]: CDTParser initialized [2020-09-25 00:05:36,769 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-lit/afnp2014.i [2020-09-25 00:05:36,864 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/50355c270/44044c857fd840aba4ae3031c1b208e8/FLAG34b0e8f5d [2020-09-25 00:05:37,411 INFO L306 CDTParser]: Found 1 translation units. [2020-09-25 00:05:37,412 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/loop-lit/afnp2014.i [2020-09-25 00:05:37,421 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/50355c270/44044c857fd840aba4ae3031c1b208e8/FLAG34b0e8f5d [2020-09-25 00:05:37,743 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/50355c270/44044c857fd840aba4ae3031c1b208e8 [2020-09-25 00:05:37,756 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-25 00:05:37,762 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-25 00:05:37,764 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-25 00:05:37,764 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-25 00:05:37,769 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-25 00:05:37,771 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.09 12:05:37" (1/1) ... [2020-09-25 00:05:37,775 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7e7cadc4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 12:05:37, skipping insertion in model container [2020-09-25 00:05:37,775 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.09 12:05:37" (1/1) ... [2020-09-25 00:05:37,784 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-25 00:05:37,810 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-25 00:05:38,025 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-25 00:05:38,031 INFO L203 MainTranslator]: Completed pre-run [2020-09-25 00:05:38,052 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-25 00:05:38,071 INFO L208 MainTranslator]: Completed translation [2020-09-25 00:05:38,072 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 12:05:38 WrapperNode [2020-09-25 00:05:38,072 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-25 00:05:38,073 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-25 00:05:38,073 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-25 00:05:38,074 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-25 00:05:38,092 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 12:05:38" (1/1) ... [2020-09-25 00:05:38,092 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 12:05:38" (1/1) ... [2020-09-25 00:05:38,099 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 12:05:38" (1/1) ... [2020-09-25 00:05:38,100 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 12:05:38" (1/1) ... [2020-09-25 00:05:38,104 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 12:05:38" (1/1) ... [2020-09-25 00:05:38,110 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 12:05:38" (1/1) ... [2020-09-25 00:05:38,111 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 12:05:38" (1/1) ... [2020-09-25 00:05:38,189 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-25 00:05:38,190 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-25 00:05:38,190 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-25 00:05:38,190 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-25 00:05:38,191 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 12:05:38" (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 [2020-09-25 00:05:38,274 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-25 00:05:38,274 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-25 00:05:38,274 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-09-25 00:05:38,274 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-09-25 00:05:38,274 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-25 00:05:38,275 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-25 00:05:38,275 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-09-25 00:05:38,275 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-09-25 00:05:38,275 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-09-25 00:05:38,275 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-09-25 00:05:38,276 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-25 00:05:38,276 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-25 00:05:38,276 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-25 00:05:38,547 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-25 00:05:38,548 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-09-25 00:05:38,554 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.09 12:05:38 BoogieIcfgContainer [2020-09-25 00:05:38,554 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-25 00:05:38,564 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-25 00:05:38,565 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-25 00:05:38,569 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-25 00:05:38,569 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.09 12:05:37" (1/3) ... [2020-09-25 00:05:38,570 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@c4bb6b6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.09 12:05:38, skipping insertion in model container [2020-09-25 00:05:38,570 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 12:05:38" (2/3) ... [2020-09-25 00:05:38,570 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@c4bb6b6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.09 12:05:38, skipping insertion in model container [2020-09-25 00:05:38,571 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.09 12:05:38" (3/3) ... [2020-09-25 00:05:38,574 INFO L109 eAbstractionObserver]: Analyzing ICFG afnp2014.i [2020-09-25 00:05:38,586 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-25 00:05:38,596 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-25 00:05:38,621 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-09-25 00:05:38,652 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-25 00:05:38,652 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-25 00:05:38,653 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-09-25 00:05:38,653 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-25 00:05:38,653 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-25 00:05:38,653 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-25 00:05:38,653 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-25 00:05:38,653 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-25 00:05:38,677 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states. [2020-09-25 00:05:38,683 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-09-25 00:05:38,684 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 00:05:38,685 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 00:05:38,685 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 00:05:38,692 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 00:05:38,692 INFO L82 PathProgramCache]: Analyzing trace with hash -270656080, now seen corresponding path program 1 times [2020-09-25 00:05:38,702 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 00:05:38,703 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1243077283] [2020-09-25 00:05:38,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 00:05:38,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 00:05:38,825 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:05:38,874 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:05:38,910 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 00:05:38,911 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 20 [2020-09-25 00:05:38,911 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-25 00:05:38,911 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 98 [2020-09-25 00:05:38,914 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-09-25 00:05:38,914 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-09-25 00:05:38,914 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-09-25 00:05:38,914 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-09-25 00:05:38,914 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-09-25 00:05:39,027 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 00:05:39,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 00:05:39,030 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:05:39,032 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 00:05:39,033 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-25 00:05:39,033 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 00:05:39,033 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-09-25 00:05:39,033 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-09-25 00:05:39,034 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 00:05:39,034 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 00:05:39,034 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 00:05:39,034 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 00:05:39,040 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 00:05:39,042 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1243077283] [2020-09-25 00:05:39,044 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-25 00:05:39,044 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-09-25 00:05:39,045 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [601599437] [2020-09-25 00:05:39,051 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-09-25 00:05:39,052 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 00:05:39,065 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-09-25 00:05:39,066 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-09-25 00:05:39,068 INFO L87 Difference]: Start difference. First operand 29 states. Second operand 6 states. [2020-09-25 00:05:39,227 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 00:05:39,227 INFO L93 Difference]: Finished difference Result 60 states and 69 transitions. [2020-09-25 00:05:39,228 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-09-25 00:05:39,229 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 11 [2020-09-25 00:05:39,230 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 00:05:39,241 INFO L225 Difference]: With dead ends: 60 [2020-09-25 00:05:39,241 INFO L226 Difference]: Without dead ends: 31 [2020-09-25 00:05:39,245 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-09-25 00:05:39,262 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2020-09-25 00:05:39,281 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 27. [2020-09-25 00:05:39,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-09-25 00:05:39,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 29 transitions. [2020-09-25 00:05:39,286 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 29 transitions. Word has length 11 [2020-09-25 00:05:39,286 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 00:05:39,286 INFO L479 AbstractCegarLoop]: Abstraction has 27 states and 29 transitions. [2020-09-25 00:05:39,286 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-09-25 00:05:39,287 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 29 transitions. [2020-09-25 00:05:39,288 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-09-25 00:05:39,288 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 00:05:39,288 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 00:05:39,288 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-25 00:05:39,289 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 00:05:39,289 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 00:05:39,289 INFO L82 PathProgramCache]: Analyzing trace with hash -1780115143, now seen corresponding path program 1 times [2020-09-25 00:05:39,290 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 00:05:39,290 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1555010436] [2020-09-25 00:05:39,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 00:05:39,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 00:05:39,313 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:05:39,328 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:05:39,369 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:05:39,411 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:05:39,608 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:05:40,038 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 00:05:40,038 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 31 [2020-09-25 00:05:40,038 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-09-25 00:05:40,039 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 733 [2020-09-25 00:05:40,040 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-09-25 00:05:40,040 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-09-25 00:05:40,040 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-09-25 00:05:40,041 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 19 [2020-09-25 00:05:40,041 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 00:05:40,116 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 00:05:40,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 00:05:40,120 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:05:40,122 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 00:05:40,123 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-25 00:05:40,123 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 00:05:40,123 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-09-25 00:05:40,123 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-09-25 00:05:40,141 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 00:05:40,141 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 00:05:40,141 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 00:05:40,142 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 18 [2020-09-25 00:05:40,147 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 00:05:40,148 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1555010436] [2020-09-25 00:05:40,151 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 00:05:40,151 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-09-25 00:05:40,151 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2063449753] [2020-09-25 00:05:40,153 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-09-25 00:05:40,153 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 00:05:40,154 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-09-25 00:05:40,154 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-09-25 00:05:40,155 INFO L87 Difference]: Start difference. First operand 27 states and 29 transitions. Second operand 7 states. [2020-09-25 00:05:40,221 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 00:05:40,221 INFO L93 Difference]: Finished difference Result 46 states and 49 transitions. [2020-09-25 00:05:40,222 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-09-25 00:05:40,222 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 22 [2020-09-25 00:05:40,223 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 00:05:40,224 INFO L225 Difference]: With dead ends: 46 [2020-09-25 00:05:40,224 INFO L226 Difference]: Without dead ends: 39 [2020-09-25 00:05:40,225 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2020-09-25 00:05:40,226 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2020-09-25 00:05:40,231 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 36. [2020-09-25 00:05:40,231 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-09-25 00:05:40,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 39 transitions. [2020-09-25 00:05:40,233 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 39 transitions. Word has length 22 [2020-09-25 00:05:40,233 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 00:05:40,233 INFO L479 AbstractCegarLoop]: Abstraction has 36 states and 39 transitions. [2020-09-25 00:05:40,234 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-09-25 00:05:40,234 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 39 transitions. [2020-09-25 00:05:40,235 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-09-25 00:05:40,235 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 00:05:40,235 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 00:05:40,236 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-25 00:05:40,236 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 00:05:40,236 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 00:05:40,236 INFO L82 PathProgramCache]: Analyzing trace with hash -703709792, now seen corresponding path program 2 times [2020-09-25 00:05:40,237 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 00:05:40,237 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1242807356] [2020-09-25 00:05:40,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 00:05:40,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 00:05:40,247 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:05:40,254 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:05:40,263 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:05:40,273 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:05:40,295 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:05:40,464 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:05:40,488 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:05:41,142 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:05:41,712 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:05:41,728 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:05:42,066 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:05:42,201 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:05:42,341 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 00:05:42,341 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 38 [2020-09-25 00:05:42,342 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 12 [2020-09-25 00:05:42,342 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2097 [2020-09-25 00:05:42,342 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-09-25 00:05:42,342 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-09-25 00:05:42,342 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-09-25 00:05:42,343 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-09-25 00:05:42,343 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 00:05:42,411 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 00:05:42,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 00:05:42,413 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:05:42,414 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 00:05:42,414 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-25 00:05:42,415 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 00:05:42,415 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-25 00:05:42,415 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-09-25 00:05:42,415 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 00:05:42,416 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 00:05:42,416 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 00:05:42,416 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 00:05:42,419 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 00:05:42,419 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1242807356] [2020-09-25 00:05:42,420 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 00:05:42,420 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-09-25 00:05:42,420 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2121479662] [2020-09-25 00:05:42,421 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-09-25 00:05:42,421 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 00:05:42,421 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-09-25 00:05:42,422 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-09-25 00:05:42,422 INFO L87 Difference]: Start difference. First operand 36 states and 39 transitions. Second operand 8 states. [2020-09-25 00:05:42,523 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 00:05:42,523 INFO L93 Difference]: Finished difference Result 55 states and 59 transitions. [2020-09-25 00:05:42,523 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-09-25 00:05:42,524 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 29 [2020-09-25 00:05:42,524 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 00:05:42,525 INFO L225 Difference]: With dead ends: 55 [2020-09-25 00:05:42,525 INFO L226 Difference]: Without dead ends: 48 [2020-09-25 00:05:42,526 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2020-09-25 00:05:42,526 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2020-09-25 00:05:42,532 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 45. [2020-09-25 00:05:42,532 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-09-25 00:05:42,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 49 transitions. [2020-09-25 00:05:42,534 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 49 transitions. Word has length 29 [2020-09-25 00:05:42,534 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 00:05:42,535 INFO L479 AbstractCegarLoop]: Abstraction has 45 states and 49 transitions. [2020-09-25 00:05:42,535 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-09-25 00:05:42,535 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 49 transitions. [2020-09-25 00:05:42,536 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-09-25 00:05:42,536 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 00:05:42,536 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 00:05:42,537 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-09-25 00:05:42,537 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 00:05:42,537 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 00:05:42,537 INFO L82 PathProgramCache]: Analyzing trace with hash -1522653351, now seen corresponding path program 3 times [2020-09-25 00:05:42,538 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 00:05:42,538 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1374609090] [2020-09-25 00:05:42,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 00:05:42,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 00:05:42,547 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:05:42,554 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:05:42,561 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:05:42,568 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:05:42,584 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:05:42,613 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:05:42,700 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:05:42,879 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:05:42,900 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:05:42,953 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:05:43,009 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:05:45,155 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:05:45,935 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:05:45,973 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:05:46,540 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:05:46,593 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:05:47,544 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 00:05:47,545 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 45 [2020-09-25 00:05:47,545 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 16 [2020-09-25 00:05:47,545 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-09-25 00:05:47,545 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-09-25 00:05:47,546 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-09-25 00:05:47,546 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-09-25 00:05:47,546 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 33 [2020-09-25 00:05:47,547 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 00:05:47,697 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 00:05:47,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 00:05:47,704 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:05:47,705 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 00:05:47,705 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-25 00:05:47,706 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 00:05:47,706 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-09-25 00:05:47,706 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-09-25 00:05:47,706 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 00:05:47,706 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 00:05:47,709 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 00:05:47,709 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-09-25 00:05:47,716 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 1 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 00:05:47,716 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1374609090] [2020-09-25 00:05:47,717 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 00:05:47,717 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-09-25 00:05:47,717 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1734299155] [2020-09-25 00:05:47,719 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-25 00:05:47,720 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 00:05:47,720 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-25 00:05:47,721 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2020-09-25 00:05:47,721 INFO L87 Difference]: Start difference. First operand 45 states and 49 transitions. Second operand 13 states. [2020-09-25 00:05:48,116 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 00:05:48,117 INFO L93 Difference]: Finished difference Result 89 states and 97 transitions. [2020-09-25 00:05:48,118 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-09-25 00:05:48,119 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 36 [2020-09-25 00:05:48,119 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 00:05:48,122 INFO L225 Difference]: With dead ends: 89 [2020-09-25 00:05:48,122 INFO L226 Difference]: Without dead ends: 82 [2020-09-25 00:05:48,125 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=148, Invalid=452, Unknown=0, NotChecked=0, Total=600 [2020-09-25 00:05:48,126 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2020-09-25 00:05:48,142 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 61. [2020-09-25 00:05:48,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2020-09-25 00:05:48,150 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 68 transitions. [2020-09-25 00:05:48,150 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 68 transitions. Word has length 36 [2020-09-25 00:05:48,151 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 00:05:48,151 INFO L479 AbstractCegarLoop]: Abstraction has 61 states and 68 transitions. [2020-09-25 00:05:48,151 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-25 00:05:48,151 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 68 transitions. [2020-09-25 00:05:48,152 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-09-25 00:05:48,153 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 00:05:48,153 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 00:05:48,153 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-09-25 00:05:48,153 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 00:05:48,153 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 00:05:48,154 INFO L82 PathProgramCache]: Analyzing trace with hash -64363748, now seen corresponding path program 1 times [2020-09-25 00:05:48,154 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 00:05:48,154 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1735240236] [2020-09-25 00:05:48,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 00:05:48,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 00:05:48,162 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:05:48,168 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:05:48,181 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:05:48,189 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:05:48,199 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:05:48,253 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:05:48,286 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:05:48,312 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:05:48,785 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:05:48,799 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:05:48,811 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:05:48,820 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:05:50,035 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:05:50,636 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:05:50,726 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:05:51,111 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:05:52,013 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:05:52,508 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:05:52,611 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:05:53,161 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 00:05:53,161 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 47 [2020-09-25 00:05:53,162 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 19 [2020-09-25 00:05:53,162 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-09-25 00:05:53,163 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-09-25 00:05:53,163 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-09-25 00:05:53,163 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-09-25 00:05:53,164 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 35 [2020-09-25 00:05:53,164 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 00:05:53,315 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 00:05:53,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 00:05:53,317 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:05:53,318 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 00:05:53,319 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-25 00:05:53,319 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 00:05:53,320 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-25 00:05:53,320 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-09-25 00:05:53,320 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 00:05:53,321 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 00:05:53,321 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 00:05:53,321 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 00:05:53,328 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 6 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 00:05:53,328 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1735240236] [2020-09-25 00:05:53,329 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 00:05:53,329 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-09-25 00:05:53,329 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [771189918] [2020-09-25 00:05:53,330 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-25 00:05:53,330 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 00:05:53,330 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-25 00:05:53,331 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2020-09-25 00:05:53,331 INFO L87 Difference]: Start difference. First operand 61 states and 68 transitions. Second operand 13 states. [2020-09-25 00:05:53,861 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 00:05:53,861 INFO L93 Difference]: Finished difference Result 141 states and 155 transitions. [2020-09-25 00:05:53,863 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-09-25 00:05:53,863 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 38 [2020-09-25 00:05:53,863 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 00:05:53,864 INFO L225 Difference]: With dead ends: 141 [2020-09-25 00:05:53,865 INFO L226 Difference]: Without dead ends: 131 [2020-09-25 00:05:53,868 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 224 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=252, Invalid=740, Unknown=0, NotChecked=0, Total=992 [2020-09-25 00:05:53,869 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2020-09-25 00:05:53,882 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 80. [2020-09-25 00:05:53,885 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2020-09-25 00:05:53,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 89 transitions. [2020-09-25 00:05:53,887 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 89 transitions. Word has length 38 [2020-09-25 00:05:53,887 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 00:05:53,888 INFO L479 AbstractCegarLoop]: Abstraction has 80 states and 89 transitions. [2020-09-25 00:05:53,890 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-25 00:05:53,890 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 89 transitions. [2020-09-25 00:05:53,892 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-09-25 00:05:53,892 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 00:05:53,892 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 00:05:53,892 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-09-25 00:05:53,893 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 00:05:53,896 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 00:05:53,896 INFO L82 PathProgramCache]: Analyzing trace with hash 875178364, now seen corresponding path program 2 times [2020-09-25 00:05:53,896 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 00:05:53,897 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1993095554] [2020-09-25 00:05:53,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 00:05:53,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 00:05:53,906 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:05:53,920 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:05:53,953 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:05:53,966 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:05:54,033 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:05:54,336 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:05:54,863 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:05:55,384 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:05:55,684 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 00:05:55,684 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 51 [2020-09-25 00:05:55,684 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-09-25 00:05:55,684 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1781 [2020-09-25 00:05:55,685 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-09-25 00:05:55,685 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-09-25 00:05:55,685 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-09-25 00:05:55,685 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 39 [2020-09-25 00:05:55,685 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 00:05:55,841 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 00:05:55,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 00:05:55,842 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:05:55,844 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 00:05:55,844 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-25 00:05:55,845 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 00:05:55,845 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-09-25 00:05:55,845 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-09-25 00:05:55,845 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 00:05:55,845 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 00:05:55,846 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 00:05:55,846 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 00:05:55,855 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 1 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 00:05:55,855 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1993095554] [2020-09-25 00:05:55,855 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 00:05:55,855 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-09-25 00:05:55,857 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [336720737] [2020-09-25 00:05:55,857 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-09-25 00:05:55,857 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 00:05:55,858 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-09-25 00:05:55,858 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=152, Unknown=0, NotChecked=0, Total=182 [2020-09-25 00:05:55,859 INFO L87 Difference]: Start difference. First operand 80 states and 89 transitions. Second operand 14 states. [2020-09-25 00:05:57,243 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 00:05:57,243 INFO L93 Difference]: Finished difference Result 303 states and 342 transitions. [2020-09-25 00:05:57,244 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2020-09-25 00:05:57,244 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 42 [2020-09-25 00:05:57,244 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 00:05:57,247 INFO L225 Difference]: With dead ends: 303 [2020-09-25 00:05:57,247 INFO L226 Difference]: Without dead ends: 290 [2020-09-25 00:05:57,250 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 878 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=664, Invalid=2528, Unknown=0, NotChecked=0, Total=3192 [2020-09-25 00:05:57,257 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 290 states. [2020-09-25 00:05:57,281 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 290 to 201. [2020-09-25 00:05:57,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 201 states. [2020-09-25 00:05:57,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 201 states to 201 states and 232 transitions. [2020-09-25 00:05:57,285 INFO L78 Accepts]: Start accepts. Automaton has 201 states and 232 transitions. Word has length 42 [2020-09-25 00:05:57,285 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 00:05:57,285 INFO L479 AbstractCegarLoop]: Abstraction has 201 states and 232 transitions. [2020-09-25 00:05:57,285 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-09-25 00:05:57,285 INFO L276 IsEmpty]: Start isEmpty. Operand 201 states and 232 transitions. [2020-09-25 00:05:57,287 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2020-09-25 00:05:57,287 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 00:05:57,288 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 00:05:57,288 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-09-25 00:05:57,288 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 00:05:57,289 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 00:05:57,289 INFO L82 PathProgramCache]: Analyzing trace with hash -736542311, now seen corresponding path program 1 times [2020-09-25 00:05:57,289 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 00:05:57,289 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1875070954] [2020-09-25 00:05:57,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 00:05:57,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 00:05:57,303 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:05:57,447 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 00:05:57,448 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 53 [2020-09-25 00:05:57,448 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 00:05:57,448 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 150 [2020-09-25 00:05:57,448 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-09-25 00:05:57,449 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-09-25 00:05:57,449 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-09-25 00:05:57,449 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 41 [2020-09-25 00:05:57,449 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 00:05:57,538 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 00:05:57,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 00:05:57,541 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:05:57,542 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 00:05:57,542 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-25 00:05:57,542 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 00:05:57,542 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-25 00:05:57,542 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-09-25 00:05:57,542 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 00:05:57,543 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 00:05:57,543 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 00:05:57,543 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 00:05:57,547 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 00:05:57,547 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1875070954] [2020-09-25 00:05:57,547 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 00:05:57,547 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-09-25 00:05:57,548 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1546667074] [2020-09-25 00:05:57,548 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-09-25 00:05:57,548 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 00:05:57,549 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-09-25 00:05:57,549 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2020-09-25 00:05:57,549 INFO L87 Difference]: Start difference. First operand 201 states and 232 transitions. Second operand 11 states. [2020-09-25 00:05:57,722 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 00:05:57,722 INFO L93 Difference]: Finished difference Result 299 states and 337 transitions. [2020-09-25 00:05:57,728 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-09-25 00:05:57,728 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 44 [2020-09-25 00:05:57,729 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 00:05:57,730 INFO L225 Difference]: With dead ends: 299 [2020-09-25 00:05:57,730 INFO L226 Difference]: Without dead ends: 292 [2020-09-25 00:05:57,734 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2020-09-25 00:05:57,735 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 292 states. [2020-09-25 00:05:57,761 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 292 to 207. [2020-09-25 00:05:57,761 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 207 states. [2020-09-25 00:05:57,766 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 207 states to 207 states and 239 transitions. [2020-09-25 00:05:57,767 INFO L78 Accepts]: Start accepts. Automaton has 207 states and 239 transitions. Word has length 44 [2020-09-25 00:05:57,767 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 00:05:57,767 INFO L479 AbstractCegarLoop]: Abstraction has 207 states and 239 transitions. [2020-09-25 00:05:57,767 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-09-25 00:05:57,768 INFO L276 IsEmpty]: Start isEmpty. Operand 207 states and 239 transitions. [2020-09-25 00:05:57,775 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-09-25 00:05:57,775 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 00:05:57,775 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 00:05:57,776 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-09-25 00:05:57,776 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 00:05:57,776 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 00:05:57,776 INFO L82 PathProgramCache]: Analyzing trace with hash 1471250016, now seen corresponding path program 3 times [2020-09-25 00:05:57,776 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 00:05:57,776 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1164328600] [2020-09-25 00:05:57,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 00:05:57,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 00:05:57,787 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:05:57,792 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:05:57,800 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:05:57,809 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:05:57,819 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:05:57,853 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:05:58,183 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:05:58,214 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:05:58,388 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:05:58,887 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:05:59,040 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:06:00,971 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:06:01,411 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:06:01,471 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:06:01,497 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:06:01,541 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:06:01,635 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:06:01,742 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:06:02,098 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:06:02,120 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:06:02,139 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:06:02,190 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:06:02,272 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:06:02,331 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:06:02,354 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:06:02,784 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 00:06:02,784 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 56 [2020-09-25 00:06:02,784 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 25 [2020-09-25 00:06:02,784 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-09-25 00:06:02,785 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-09-25 00:06:02,785 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-09-25 00:06:02,785 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-09-25 00:06:02,785 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 44 [2020-09-25 00:06:02,785 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 00:06:02,972 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 00:06:02,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 00:06:02,975 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:06:02,976 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 00:06:02,976 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-25 00:06:02,976 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 00:06:02,977 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-09-25 00:06:02,977 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-09-25 00:06:02,977 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 00:06:02,977 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 00:06:02,977 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 00:06:02,977 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 00:06:02,986 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 00:06:02,987 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1164328600] [2020-09-25 00:06:02,987 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 00:06:02,987 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-09-25 00:06:02,987 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1269466433] [2020-09-25 00:06:02,988 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-25 00:06:02,988 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 00:06:02,988 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-25 00:06:02,989 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=176, Unknown=0, NotChecked=0, Total=210 [2020-09-25 00:06:02,989 INFO L87 Difference]: Start difference. First operand 207 states and 239 transitions. Second operand 15 states. [2020-09-25 00:06:03,515 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 00:06:03,515 INFO L93 Difference]: Finished difference Result 257 states and 295 transitions. [2020-09-25 00:06:03,516 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-09-25 00:06:03,516 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 47 [2020-09-25 00:06:03,516 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 00:06:03,518 INFO L225 Difference]: With dead ends: 257 [2020-09-25 00:06:03,518 INFO L226 Difference]: Without dead ends: 250 [2020-09-25 00:06:03,519 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 164 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=207, Invalid=663, Unknown=0, NotChecked=0, Total=870 [2020-09-25 00:06:03,519 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 250 states. [2020-09-25 00:06:03,531 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 250 to 177. [2020-09-25 00:06:03,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 177 states. [2020-09-25 00:06:03,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177 states to 177 states and 201 transitions. [2020-09-25 00:06:03,533 INFO L78 Accepts]: Start accepts. Automaton has 177 states and 201 transitions. Word has length 47 [2020-09-25 00:06:03,533 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 00:06:03,533 INFO L479 AbstractCegarLoop]: Abstraction has 177 states and 201 transitions. [2020-09-25 00:06:03,533 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-25 00:06:03,534 INFO L276 IsEmpty]: Start isEmpty. Operand 177 states and 201 transitions. [2020-09-25 00:06:03,536 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2020-09-25 00:06:03,536 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 00:06:03,536 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 00:06:03,536 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-09-25 00:06:03,536 INFO L427 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 00:06:03,537 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 00:06:03,537 INFO L82 PathProgramCache]: Analyzing trace with hash -2120702173, now seen corresponding path program 4 times [2020-09-25 00:06:03,537 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 00:06:03,537 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1381268483] [2020-09-25 00:06:03,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 00:06:03,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 00:06:03,544 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:06:03,552 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:06:03,560 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:06:03,576 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:06:03,790 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:06:03,807 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:06:03,818 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:06:03,831 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:06:04,088 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:06:05,473 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:06:05,548 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:06:05,743 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:06:05,819 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:06:05,845 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:06:05,880 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:06:07,587 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:06:08,498 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:06:08,542 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 00:06:08,542 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 58 [2020-09-25 00:06:08,542 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 17 [2020-09-25 00:06:08,543 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-09-25 00:06:08,543 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-09-25 00:06:08,543 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-09-25 00:06:08,543 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-09-25 00:06:08,543 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 46 [2020-09-25 00:06:08,544 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 00:06:08,759 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 00:06:08,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 00:06:08,761 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:06:08,762 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 00:06:08,762 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-25 00:06:08,762 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 00:06:08,762 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-25 00:06:08,762 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-09-25 00:06:08,763 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 00:06:08,763 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 00:06:08,763 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 00:06:08,763 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 00:06:08,769 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 8 proven. 52 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 00:06:08,769 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1381268483] [2020-09-25 00:06:08,769 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 00:06:08,770 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-09-25 00:06:08,770 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1938834060] [2020-09-25 00:06:08,770 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-25 00:06:08,770 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 00:06:08,771 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-25 00:06:08,771 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2020-09-25 00:06:08,771 INFO L87 Difference]: Start difference. First operand 177 states and 201 transitions. Second operand 17 states. [2020-09-25 00:06:10,185 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 00:06:10,185 INFO L93 Difference]: Finished difference Result 219 states and 244 transitions. [2020-09-25 00:06:10,185 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2020-09-25 00:06:10,186 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 49 [2020-09-25 00:06:10,186 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 00:06:10,188 INFO L225 Difference]: With dead ends: 219 [2020-09-25 00:06:10,189 INFO L226 Difference]: Without dead ends: 212 [2020-09-25 00:06:10,191 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 740 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=685, Invalid=2285, Unknown=0, NotChecked=0, Total=2970 [2020-09-25 00:06:10,192 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 212 states. [2020-09-25 00:06:10,198 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 212 to 167. [2020-09-25 00:06:10,198 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 167 states. [2020-09-25 00:06:10,200 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 188 transitions. [2020-09-25 00:06:10,200 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 188 transitions. Word has length 49 [2020-09-25 00:06:10,200 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 00:06:10,201 INFO L479 AbstractCegarLoop]: Abstraction has 167 states and 188 transitions. [2020-09-25 00:06:10,201 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-25 00:06:10,201 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 188 transitions. [2020-09-25 00:06:10,203 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-09-25 00:06:10,203 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 00:06:10,203 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 00:06:10,203 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-09-25 00:06:10,204 INFO L427 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 00:06:10,204 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 00:06:10,204 INFO L82 PathProgramCache]: Analyzing trace with hash -947870618, now seen corresponding path program 5 times [2020-09-25 00:06:10,204 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 00:06:10,205 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1396508737] [2020-09-25 00:06:10,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 00:06:10,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 00:06:10,219 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:06:10,229 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:06:10,246 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:06:10,471 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:06:11,022 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:06:11,145 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:06:11,483 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:06:11,745 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:06:11,923 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:06:12,138 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:06:12,256 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:06:12,420 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 00:06:12,420 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 60 [2020-09-25 00:06:12,420 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 11 [2020-09-25 00:06:12,420 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2207 [2020-09-25 00:06:12,420 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-09-25 00:06:12,420 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-09-25 00:06:12,421 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-09-25 00:06:12,421 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 48 [2020-09-25 00:06:12,421 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 00:06:12,607 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 00:06:12,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 00:06:12,609 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:06:12,609 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 00:06:12,610 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-25 00:06:12,610 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 00:06:12,610 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-25 00:06:12,610 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-09-25 00:06:12,611 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 00:06:12,611 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 00:06:12,611 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 00:06:12,611 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 00:06:12,616 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 6 proven. 60 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 00:06:12,616 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1396508737] [2020-09-25 00:06:12,617 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 00:06:12,617 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-09-25 00:06:12,617 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1200107361] [2020-09-25 00:06:12,618 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-09-25 00:06:12,618 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 00:06:12,618 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-09-25 00:06:12,618 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=202, Unknown=0, NotChecked=0, Total=240 [2020-09-25 00:06:12,618 INFO L87 Difference]: Start difference. First operand 167 states and 188 transitions. Second operand 16 states. [2020-09-25 00:06:13,515 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 00:06:13,516 INFO L93 Difference]: Finished difference Result 316 states and 348 transitions. [2020-09-25 00:06:13,516 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-09-25 00:06:13,516 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 51 [2020-09-25 00:06:13,517 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 00:06:13,518 INFO L225 Difference]: With dead ends: 316 [2020-09-25 00:06:13,519 INFO L226 Difference]: Without dead ends: 309 [2020-09-25 00:06:13,520 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 547 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=394, Invalid=1768, Unknown=0, NotChecked=0, Total=2162 [2020-09-25 00:06:13,520 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 309 states. [2020-09-25 00:06:13,526 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 309 to 177. [2020-09-25 00:06:13,527 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 177 states. [2020-09-25 00:06:13,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177 states to 177 states and 199 transitions. [2020-09-25 00:06:13,528 INFO L78 Accepts]: Start accepts. Automaton has 177 states and 199 transitions. Word has length 51 [2020-09-25 00:06:13,528 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 00:06:13,528 INFO L479 AbstractCegarLoop]: Abstraction has 177 states and 199 transitions. [2020-09-25 00:06:13,528 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-09-25 00:06:13,529 INFO L276 IsEmpty]: Start isEmpty. Operand 177 states and 199 transitions. [2020-09-25 00:06:13,531 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-09-25 00:06:13,531 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 00:06:13,531 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 00:06:13,531 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-09-25 00:06:13,532 INFO L427 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 00:06:13,532 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 00:06:13,532 INFO L82 PathProgramCache]: Analyzing trace with hash 621515174, now seen corresponding path program 6 times [2020-09-25 00:06:13,532 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 00:06:13,532 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [538011866] [2020-09-25 00:06:13,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 00:06:13,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 00:06:13,542 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:06:13,549 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:06:13,558 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:06:13,574 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:06:13,672 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:06:14,627 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:06:15,396 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:06:15,899 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:06:17,340 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:06:17,434 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:06:18,538 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 00:06:18,539 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 60 [2020-09-25 00:06:18,539 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 10 [2020-09-25 00:06:18,539 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-09-25 00:06:18,539 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-09-25 00:06:18,539 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-09-25 00:06:18,540 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-09-25 00:06:18,540 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 48 [2020-09-25 00:06:18,540 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 00:06:18,649 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 00:06:18,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 00:06:18,651 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:06:18,652 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 00:06:18,652 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-25 00:06:18,652 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 00:06:18,652 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-25 00:06:18,653 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-09-25 00:06:18,653 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 00:06:18,653 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 00:06:18,653 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 00:06:18,653 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 00:06:18,663 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 10 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 00:06:18,664 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [538011866] [2020-09-25 00:06:18,664 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 00:06:18,664 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-09-25 00:06:18,664 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1226948791] [2020-09-25 00:06:18,665 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-25 00:06:18,665 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 00:06:18,665 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-25 00:06:18,665 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2020-09-25 00:06:18,666 INFO L87 Difference]: Start difference. First operand 177 states and 199 transitions. Second operand 13 states. [2020-09-25 00:06:19,352 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 00:06:19,353 INFO L93 Difference]: Finished difference Result 350 states and 389 transitions. [2020-09-25 00:06:19,353 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-09-25 00:06:19,353 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 51 [2020-09-25 00:06:19,354 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 00:06:19,356 INFO L225 Difference]: With dead ends: 350 [2020-09-25 00:06:19,356 INFO L226 Difference]: Without dead ends: 337 [2020-09-25 00:06:19,357 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 258 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=293, Invalid=1039, Unknown=0, NotChecked=0, Total=1332 [2020-09-25 00:06:19,358 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 337 states. [2020-09-25 00:06:19,366 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 337 to 231. [2020-09-25 00:06:19,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 231 states. [2020-09-25 00:06:19,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 231 states to 231 states and 262 transitions. [2020-09-25 00:06:19,368 INFO L78 Accepts]: Start accepts. Automaton has 231 states and 262 transitions. Word has length 51 [2020-09-25 00:06:19,368 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 00:06:19,368 INFO L479 AbstractCegarLoop]: Abstraction has 231 states and 262 transitions. [2020-09-25 00:06:19,368 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-25 00:06:19,368 INFO L276 IsEmpty]: Start isEmpty. Operand 231 states and 262 transitions. [2020-09-25 00:06:19,370 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-09-25 00:06:19,370 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 00:06:19,370 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 00:06:19,370 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-09-25 00:06:19,371 INFO L427 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 00:06:19,371 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 00:06:19,371 INFO L82 PathProgramCache]: Analyzing trace with hash -1503424832, now seen corresponding path program 7 times [2020-09-25 00:06:19,371 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 00:06:19,371 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1564745104] [2020-09-25 00:06:19,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 00:06:19,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 00:06:19,378 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:06:19,389 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:06:19,401 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:06:19,409 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:06:19,422 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:06:19,553 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:06:21,051 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:06:21,855 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:06:22,373 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:06:24,378 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 00:06:24,378 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 60 [2020-09-25 00:06:24,379 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-09-25 00:06:24,379 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-09-25 00:06:24,380 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-09-25 00:06:24,380 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-09-25 00:06:24,380 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-09-25 00:06:24,380 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 48 [2020-09-25 00:06:24,380 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 00:06:24,568 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 00:06:24,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 00:06:24,570 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:06:24,570 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 00:06:24,571 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-25 00:06:24,571 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 00:06:24,571 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-25 00:06:24,571 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-09-25 00:06:24,572 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 00:06:24,572 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 00:06:24,572 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 00:06:24,572 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 00:06:24,580 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 1 proven. 65 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 00:06:24,582 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1564745104] [2020-09-25 00:06:24,583 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 00:06:24,583 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-09-25 00:06:24,583 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [541436021] [2020-09-25 00:06:24,584 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-09-25 00:06:24,585 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 00:06:24,585 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-09-25 00:06:24,585 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=205, Unknown=0, NotChecked=0, Total=240 [2020-09-25 00:06:24,586 INFO L87 Difference]: Start difference. First operand 231 states and 262 transitions. Second operand 16 states. [2020-09-25 00:06:27,424 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 00:06:27,425 INFO L93 Difference]: Finished difference Result 615 states and 699 transitions. [2020-09-25 00:06:27,425 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 87 states. [2020-09-25 00:06:27,425 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 51 [2020-09-25 00:06:27,425 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 00:06:27,428 INFO L225 Difference]: With dead ends: 615 [2020-09-25 00:06:27,428 INFO L226 Difference]: Without dead ends: 596 [2020-09-25 00:06:27,431 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3028 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=1641, Invalid=7289, Unknown=0, NotChecked=0, Total=8930 [2020-09-25 00:06:27,431 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 596 states. [2020-09-25 00:06:27,444 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 596 to 430. [2020-09-25 00:06:27,444 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 430 states. [2020-09-25 00:06:27,446 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 430 states to 430 states and 499 transitions. [2020-09-25 00:06:27,447 INFO L78 Accepts]: Start accepts. Automaton has 430 states and 499 transitions. Word has length 51 [2020-09-25 00:06:27,447 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 00:06:27,447 INFO L479 AbstractCegarLoop]: Abstraction has 430 states and 499 transitions. [2020-09-25 00:06:27,447 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-09-25 00:06:27,447 INFO L276 IsEmpty]: Start isEmpty. Operand 430 states and 499 transitions. [2020-09-25 00:06:27,448 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-09-25 00:06:27,448 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 00:06:27,448 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 00:06:27,449 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-09-25 00:06:27,449 INFO L427 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 00:06:27,449 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 00:06:27,449 INFO L82 PathProgramCache]: Analyzing trace with hash 306267971, now seen corresponding path program 2 times [2020-09-25 00:06:27,449 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 00:06:27,450 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [480309007] [2020-09-25 00:06:27,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 00:06:27,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 00:06:27,465 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:06:27,658 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 00:06:27,658 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 62 [2020-09-25 00:06:27,658 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 00:06:27,658 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 199 [2020-09-25 00:06:27,658 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-09-25 00:06:27,658 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-09-25 00:06:27,659 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-09-25 00:06:27,659 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 50 [2020-09-25 00:06:27,659 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 00:06:27,783 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 00:06:27,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 00:06:27,785 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:06:27,786 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 00:06:27,786 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-25 00:06:27,786 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 00:06:27,786 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-25 00:06:27,786 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-09-25 00:06:27,787 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 00:06:27,787 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 00:06:27,787 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 00:06:27,787 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 00:06:27,790 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 0 proven. 74 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 00:06:27,791 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [480309007] [2020-09-25 00:06:27,791 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 00:06:27,791 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-09-25 00:06:27,791 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1852221043] [2020-09-25 00:06:27,791 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-09-25 00:06:27,792 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 00:06:27,792 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-09-25 00:06:27,792 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2020-09-25 00:06:27,792 INFO L87 Difference]: Start difference. First operand 430 states and 499 transitions. Second operand 12 states. [2020-09-25 00:06:27,969 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 00:06:27,969 INFO L93 Difference]: Finished difference Result 670 states and 757 transitions. [2020-09-25 00:06:27,970 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-09-25 00:06:27,970 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 53 [2020-09-25 00:06:27,970 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 00:06:27,973 INFO L225 Difference]: With dead ends: 670 [2020-09-25 00:06:27,973 INFO L226 Difference]: Without dead ends: 663 [2020-09-25 00:06:27,974 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=50, Invalid=222, Unknown=0, NotChecked=0, Total=272 [2020-09-25 00:06:27,975 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 663 states. [2020-09-25 00:06:27,988 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 663 to 439. [2020-09-25 00:06:27,988 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 439 states. [2020-09-25 00:06:27,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 439 states to 439 states and 509 transitions. [2020-09-25 00:06:27,990 INFO L78 Accepts]: Start accepts. Automaton has 439 states and 509 transitions. Word has length 53 [2020-09-25 00:06:27,990 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 00:06:27,990 INFO L479 AbstractCegarLoop]: Abstraction has 439 states and 509 transitions. [2020-09-25 00:06:27,990 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-09-25 00:06:27,991 INFO L276 IsEmpty]: Start isEmpty. Operand 439 states and 509 transitions. [2020-09-25 00:06:27,992 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-09-25 00:06:27,992 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 00:06:27,992 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 5, 5, 5, 5, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 00:06:27,992 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-09-25 00:06:27,992 INFO L427 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 00:06:27,992 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 00:06:27,993 INFO L82 PathProgramCache]: Analyzing trace with hash -266256586, now seen corresponding path program 8 times [2020-09-25 00:06:27,993 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 00:06:27,993 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1262942513] [2020-09-25 00:06:27,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 00:06:27,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 00:06:28,000 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:06:28,006 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:06:28,014 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:06:28,022 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:06:28,036 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:06:28,046 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:06:28,331 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:06:28,355 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:06:28,777 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:06:28,833 FATAL L256 erpolLogProxyWrapper]: Now shrinking...