/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --rcfgbuilder.size.of.a.code.block SequenceOfStatements --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=BIGGEST --traceabstraction.additional.smt.options log-additional-information=true --traceabstraction.additional.smt.options unknown-allowed=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/array-examples/standard_copyInitSum3_ground.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-adbd35c [2020-10-12 09:55:04,093 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-12 09:55:04,096 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-12 09:55:04,136 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-12 09:55:04,136 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-12 09:55:04,141 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-12 09:55:04,143 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-12 09:55:04,147 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-12 09:55:04,152 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-12 09:55:04,153 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-12 09:55:04,154 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-12 09:55:04,155 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-12 09:55:04,155 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-12 09:55:04,156 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-12 09:55:04,157 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-12 09:55:04,158 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-12 09:55:04,159 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-12 09:55:04,160 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-12 09:55:04,161 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-12 09:55:04,163 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-12 09:55:04,164 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-12 09:55:04,165 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-12 09:55:04,166 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-12 09:55:04,167 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-12 09:55:04,169 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-12 09:55:04,169 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-12 09:55:04,170 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-12 09:55:04,171 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-12 09:55:04,171 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-12 09:55:04,172 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-12 09:55:04,172 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-12 09:55:04,173 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-12 09:55:04,173 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-12 09:55:04,174 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-12 09:55:04,175 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-12 09:55:04,175 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-12 09:55:04,176 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-12 09:55:04,176 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-12 09:55:04,176 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-12 09:55:04,177 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-12 09:55:04,178 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-12 09:55:04,179 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-12 09:55:04,215 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-12 09:55:04,216 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-12 09:55:04,218 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-12 09:55:04,219 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-12 09:55:04,219 INFO L138 SettingsManager]: * Use SBE=true [2020-10-12 09:55:04,219 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-12 09:55:04,219 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-12 09:55:04,219 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-12 09:55:04,220 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-12 09:55:04,220 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-12 09:55:04,220 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-12 09:55:04,220 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-12 09:55:04,220 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-12 09:55:04,220 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-12 09:55:04,221 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-12 09:55:04,221 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-12 09:55:04,221 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-12 09:55:04,221 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-12 09:55:04,221 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-12 09:55:04,222 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-12 09:55:04,222 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-12 09:55:04,223 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-12 09:55:04,224 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-12 09:55:04,224 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-12 09:55:04,224 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-12 09:55:04,225 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-12 09:55:04,225 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-12 09:55:04,225 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-12 09:55:04,225 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-12 09:55:04,225 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 -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=BIGGEST;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=BIGGEST;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=BIGGEST;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=BIGGEST;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=BIGGEST;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=BIGGEST;log-additional-information=true;unknown-allowed=true; [2020-10-12 09:55:04,538 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-12 09:55:04,554 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-12 09:55:04,559 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-12 09:55:04,561 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-12 09:55:04,562 INFO L275 PluginConnector]: CDTParser initialized [2020-10-12 09:55:04,563 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-examples/standard_copyInitSum3_ground.i [2020-10-12 09:55:04,631 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/8d7fc77d3/999e0bafa4f64897987ad2464b58fdd8/FLAG34f87867c [2020-10-12 09:55:05,089 INFO L306 CDTParser]: Found 1 translation units. [2020-10-12 09:55:05,090 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/array-examples/standard_copyInitSum3_ground.i [2020-10-12 09:55:05,097 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/8d7fc77d3/999e0bafa4f64897987ad2464b58fdd8/FLAG34f87867c [2020-10-12 09:55:05,470 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/8d7fc77d3/999e0bafa4f64897987ad2464b58fdd8 [2020-10-12 09:55:05,482 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-12 09:55:05,485 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-12 09:55:05,489 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-12 09:55:05,489 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-12 09:55:05,493 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-12 09:55:05,494 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.10 09:55:05" (1/1) ... [2020-10-12 09:55:05,497 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@39599598 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 09:55:05, skipping insertion in model container [2020-10-12 09:55:05,497 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.10 09:55:05" (1/1) ... [2020-10-12 09:55:05,506 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-12 09:55:05,530 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-12 09:55:05,835 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-12 09:55:05,842 INFO L203 MainTranslator]: Completed pre-run [2020-10-12 09:55:05,881 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-12 09:55:06,021 INFO L208 MainTranslator]: Completed translation [2020-10-12 09:55:06,023 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 09:55:06 WrapperNode [2020-10-12 09:55:06,023 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-12 09:55:06,024 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-12 09:55:06,024 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-12 09:55:06,024 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-12 09:55:06,038 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 09:55:06" (1/1) ... [2020-10-12 09:55:06,040 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 09:55:06" (1/1) ... [2020-10-12 09:55:06,052 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 09:55:06" (1/1) ... [2020-10-12 09:55:06,053 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 09:55:06" (1/1) ... [2020-10-12 09:55:06,077 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 09:55:06" (1/1) ... [2020-10-12 09:55:06,086 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 09:55:06" (1/1) ... [2020-10-12 09:55:06,094 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 09:55:06" (1/1) ... [2020-10-12 09:55:06,099 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-12 09:55:06,100 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-12 09:55:06,100 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-12 09:55:06,100 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-12 09:55:06,101 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 09:55:06" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-12 09:55:06,176 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-12 09:55:06,176 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-12 09:55:06,176 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-12 09:55:06,177 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-12 09:55:06,177 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-10-12 09:55:06,177 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-12 09:55:06,177 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-12 09:55:06,178 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-12 09:55:06,179 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-12 09:55:06,179 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-12 09:55:06,179 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-12 09:55:06,179 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-12 09:55:06,179 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-12 09:55:06,456 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-12 09:55:06,457 INFO L295 CfgBuilder]: Removed 5 assume(true) statements. [2020-10-12 09:55:06,462 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.10 09:55:06 BoogieIcfgContainer [2020-10-12 09:55:06,463 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-12 09:55:06,464 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-12 09:55:06,464 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-12 09:55:06,467 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-12 09:55:06,468 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.10 09:55:05" (1/3) ... [2020-10-12 09:55:06,469 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7529ecf5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.10 09:55:06, skipping insertion in model container [2020-10-12 09:55:06,469 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 09:55:06" (2/3) ... [2020-10-12 09:55:06,469 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7529ecf5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.10 09:55:06, skipping insertion in model container [2020-10-12 09:55:06,469 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.10 09:55:06" (3/3) ... [2020-10-12 09:55:06,471 INFO L109 eAbstractionObserver]: Analyzing ICFG standard_copyInitSum3_ground.i [2020-10-12 09:55:06,484 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-12 09:55:06,491 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-12 09:55:06,509 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-12 09:55:06,537 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-10-12 09:55:06,537 INFO L376 AbstractCegarLoop]: Hoare is true [2020-10-12 09:55:06,537 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-12 09:55:06,537 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-12 09:55:06,540 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-12 09:55:06,541 INFO L380 AbstractCegarLoop]: Difference is false [2020-10-12 09:55:06,541 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-12 09:55:06,541 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-12 09:55:06,577 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states. [2020-10-12 09:55:06,590 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-10-12 09:55:06,590 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:55:06,591 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:55:06,592 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:55:06,598 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:55:06,598 INFO L82 PathProgramCache]: Analyzing trace with hash 656367922, now seen corresponding path program 1 times [2020-10-12 09:55:06,609 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:55:06,609 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1311349729] [2020-10-12 09:55:06,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:55:06,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:55:06,731 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:55:06,778 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:55:06,811 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:55:06,836 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:55:07,279 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:55:07,280 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 27 [2020-10-12 09:55:07,281 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-12 09:55:07,281 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 567 [2020-10-12 09:55:07,287 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:55:07,287 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 09:55:07,288 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-12 09:55:07,288 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-12 09:55:07,288 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-12 09:55:07,347 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:55:07,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:55:07,353 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:55:07,356 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:55:07,357 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:55:07,357 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:55:07,357 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-12 09:55:07,358 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:55:07,358 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:55:07,359 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:55:07,359 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:55:07,359 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 09:55:07,371 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 09:55:07,372 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1311349729] [2020-10-12 09:55:07,374 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 09:55:07,374 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-12 09:55:07,375 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1258665601] [2020-10-12 09:55:07,381 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-12 09:55:07,381 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:55:07,395 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-12 09:55:07,397 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-12 09:55:07,399 INFO L87 Difference]: Start difference. First operand 32 states. Second operand 4 states. [2020-10-12 09:55:07,577 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:55:07,578 INFO L93 Difference]: Finished difference Result 64 states and 91 transitions. [2020-10-12 09:55:07,579 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-12 09:55:07,580 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 19 [2020-10-12 09:55:07,581 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:55:07,589 INFO L225 Difference]: With dead ends: 64 [2020-10-12 09:55:07,589 INFO L226 Difference]: Without dead ends: 34 [2020-10-12 09:55:07,593 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-12 09:55:07,608 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2020-10-12 09:55:07,627 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 31. [2020-10-12 09:55:07,628 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2020-10-12 09:55:07,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 35 transitions. [2020-10-12 09:55:07,631 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 35 transitions. Word has length 19 [2020-10-12 09:55:07,631 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:55:07,631 INFO L479 AbstractCegarLoop]: Abstraction has 31 states and 35 transitions. [2020-10-12 09:55:07,632 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-12 09:55:07,632 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 35 transitions. [2020-10-12 09:55:07,633 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-12 09:55:07,633 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:55:07,633 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:55:07,634 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-12 09:55:07,634 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:55:07,635 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:55:07,635 INFO L82 PathProgramCache]: Analyzing trace with hash 1442018896, now seen corresponding path program 1 times [2020-10-12 09:55:07,635 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:55:07,636 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [227310634] [2020-10-12 09:55:07,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:55:07,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:55:07,658 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:55:07,682 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:55:07,701 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:55:07,717 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:55:08,974 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:55:09,238 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:55:11,759 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:55:11,760 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 34 [2020-10-12 09:55:11,760 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-12 09:55:11,761 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4108 [2020-10-12 09:55:11,761 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:55:11,762 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-12 09:55:11,763 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 09:55:11,763 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-12 09:55:11,764 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-12 09:55:12,366 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:55:12,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:55:12,372 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:55:12,374 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:55:12,375 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:55:12,375 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:55:12,376 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-12 09:55:12,377 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:55:12,378 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:55:12,378 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:55:12,379 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:55:12,379 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-12 09:55:12,392 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-12 09:55:12,394 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [227310634] [2020-10-12 09:55:12,394 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:55:12,395 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-12 09:55:12,395 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1950940101] [2020-10-12 09:55:12,408 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-12 09:55:12,408 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:55:12,409 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-12 09:55:12,410 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=129, Unknown=0, NotChecked=0, Total=156 [2020-10-12 09:55:12,410 INFO L87 Difference]: Start difference. First operand 31 states and 35 transitions. Second operand 13 states. [2020-10-12 09:55:13,082 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:55:13,082 INFO L93 Difference]: Finished difference Result 50 states and 56 transitions. [2020-10-12 09:55:13,083 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-12 09:55:13,083 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 26 [2020-10-12 09:55:13,083 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:55:13,086 INFO L225 Difference]: With dead ends: 50 [2020-10-12 09:55:13,086 INFO L226 Difference]: Without dead ends: 48 [2020-10-12 09:55:13,091 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=73, Invalid=347, Unknown=0, NotChecked=0, Total=420 [2020-10-12 09:55:13,092 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2020-10-12 09:55:13,128 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 40. [2020-10-12 09:55:13,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-10-12 09:55:13,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 45 transitions. [2020-10-12 09:55:13,132 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 45 transitions. Word has length 26 [2020-10-12 09:55:13,132 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:55:13,133 INFO L479 AbstractCegarLoop]: Abstraction has 40 states and 45 transitions. [2020-10-12 09:55:13,133 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-12 09:55:13,134 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 45 transitions. [2020-10-12 09:55:13,135 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-12 09:55:13,135 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:55:13,136 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, 1, 1, 1, 1, 1, 1] [2020-10-12 09:55:13,137 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-12 09:55:13,137 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:55:13,138 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:55:13,138 INFO L82 PathProgramCache]: Analyzing trace with hash -1464324850, now seen corresponding path program 2 times [2020-10-12 09:55:13,138 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:55:13,139 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [472251741] [2020-10-12 09:55:13,139 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:55:13,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:55:13,164 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:55:13,190 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:55:13,203 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:55:13,216 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:55:14,599 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:55:14,835 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:55:15,342 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:55:15,690 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:55:18,161 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:55:18,161 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 36 [2020-10-12 09:55:18,161 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-12 09:55:18,162 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-12 09:55:18,162 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:55:18,162 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-12 09:55:18,162 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 09:55:18,162 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-10-12 09:55:18,163 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:55:18,579 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:55:18,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:55:18,582 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:55:18,585 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:55:18,585 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:55:18,585 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:55:18,585 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-12 09:55:18,586 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:55:18,586 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:55:18,586 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:55:18,586 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:55:18,586 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:55:18,594 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-12 09:55:18,595 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [472251741] [2020-10-12 09:55:18,595 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:55:18,595 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-12 09:55:18,596 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1134646015] [2020-10-12 09:55:18,596 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-12 09:55:18,597 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:55:18,598 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-12 09:55:18,598 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2020-10-12 09:55:18,598 INFO L87 Difference]: Start difference. First operand 40 states and 45 transitions. Second operand 14 states. [2020-10-12 09:55:19,700 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:55:19,701 INFO L93 Difference]: Finished difference Result 90 states and 106 transitions. [2020-10-12 09:55:19,701 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-12 09:55:19,702 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 28 [2020-10-12 09:55:19,702 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:55:19,705 INFO L225 Difference]: With dead ends: 90 [2020-10-12 09:55:19,705 INFO L226 Difference]: Without dead ends: 88 [2020-10-12 09:55:19,706 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 141 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=186, Invalid=684, Unknown=0, NotChecked=0, Total=870 [2020-10-12 09:55:19,707 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2020-10-12 09:55:19,718 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 54. [2020-10-12 09:55:19,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-10-12 09:55:19,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 64 transitions. [2020-10-12 09:55:19,720 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 64 transitions. Word has length 28 [2020-10-12 09:55:19,721 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:55:19,721 INFO L479 AbstractCegarLoop]: Abstraction has 54 states and 64 transitions. [2020-10-12 09:55:19,721 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-12 09:55:19,721 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 64 transitions. [2020-10-12 09:55:19,722 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-10-12 09:55:19,723 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:55:19,723 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:55:19,723 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-12 09:55:19,723 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:55:19,724 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:55:19,724 INFO L82 PathProgramCache]: Analyzing trace with hash 1487852807, now seen corresponding path program 1 times [2020-10-12 09:55:19,724 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:55:19,724 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [743190237] [2020-10-12 09:55:19,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:55:19,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:55:19,735 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:55:19,744 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:55:19,752 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:55:19,758 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:55:19,863 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:55:21,592 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:55:21,593 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 44 [2020-10-12 09:55:21,593 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-12 09:55:21,593 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1859 [2020-10-12 09:55:21,593 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:55:21,593 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-12 09:55:21,594 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 09:55:21,594 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-12 09:55:21,594 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:55:21,998 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:55:22,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:55:22,002 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:55:22,003 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:55:22,003 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:55:22,004 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:55:22,004 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 09:55:22,004 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:55:22,005 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:55:22,005 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:55:22,005 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:55:22,005 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:55:22,007 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2020-10-12 09:55:22,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:55:22,013 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:55:22,016 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:55:22,017 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 09:55:22,017 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:55:22,017 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-12 09:55:22,018 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:55:22,018 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-12 09:55:22,018 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-12 09:55:22,018 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-12 09:55:22,018 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:55:22,057 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 09:55:22,058 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [743190237] [2020-10-12 09:55:22,058 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:55:22,058 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-12 09:55:22,059 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1827463644] [2020-10-12 09:55:22,059 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-12 09:55:22,059 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:55:22,060 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-12 09:55:22,060 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=164, Unknown=0, NotChecked=0, Total=210 [2020-10-12 09:55:22,060 INFO L87 Difference]: Start difference. First operand 54 states and 64 transitions. Second operand 15 states. [2020-10-12 09:55:22,452 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:55:22,452 INFO L93 Difference]: Finished difference Result 74 states and 87 transitions. [2020-10-12 09:55:22,453 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-12 09:55:22,453 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 34 [2020-10-12 09:55:22,454 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:55:22,454 INFO L225 Difference]: With dead ends: 74 [2020-10-12 09:55:22,455 INFO L226 Difference]: Without dead ends: 61 [2020-10-12 09:55:22,456 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=111, Invalid=395, Unknown=0, NotChecked=0, Total=506 [2020-10-12 09:55:22,457 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2020-10-12 09:55:22,468 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 56. [2020-10-12 09:55:22,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-10-12 09:55:22,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 65 transitions. [2020-10-12 09:55:22,472 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 65 transitions. Word has length 34 [2020-10-12 09:55:22,473 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:55:22,473 INFO L479 AbstractCegarLoop]: Abstraction has 56 states and 65 transitions. [2020-10-12 09:55:22,473 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-12 09:55:22,473 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 65 transitions. [2020-10-12 09:55:22,475 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-10-12 09:55:22,475 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:55:22,475 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:55:22,476 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-12 09:55:22,476 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:55:22,476 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:55:22,476 INFO L82 PathProgramCache]: Analyzing trace with hash -609188600, now seen corresponding path program 3 times [2020-10-12 09:55:22,477 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:55:22,477 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1035098829] [2020-10-12 09:55:22,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:55:22,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:55:22,501 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:55:22,511 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:55:22,524 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:55:22,574 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:55:25,486 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:55:25,805 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:55:26,676 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:55:27,497 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:55:27,498 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 42 [2020-10-12 09:55:27,498 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-12 09:55:27,498 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4999 [2020-10-12 09:55:27,498 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:55:27,498 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-12 09:55:27,499 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 09:55:27,499 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-12 09:55:27,499 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:55:28,254 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:55:28,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:55:28,260 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:55:28,262 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:55:28,263 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:55:28,263 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:55:28,263 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 09:55:28,263 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:55:28,264 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:55:28,264 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:55:28,264 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:55:28,265 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 09:55:28,278 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-10-12 09:55:28,278 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1035098829] [2020-10-12 09:55:28,278 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:55:28,279 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-12 09:55:28,279 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1438333599] [2020-10-12 09:55:28,279 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-12 09:55:28,280 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:55:28,280 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-12 09:55:28,281 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=214, Unknown=0, NotChecked=0, Total=272 [2020-10-12 09:55:28,281 INFO L87 Difference]: Start difference. First operand 56 states and 65 transitions. Second operand 17 states. [2020-10-12 09:55:29,338 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:55:29,338 INFO L93 Difference]: Finished difference Result 89 states and 103 transitions. [2020-10-12 09:55:29,342 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-12 09:55:29,343 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 34 [2020-10-12 09:55:29,343 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:55:29,344 INFO L225 Difference]: With dead ends: 89 [2020-10-12 09:55:29,344 INFO L226 Difference]: Without dead ends: 87 [2020-10-12 09:55:29,349 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 3 SyntacticMatches, 3 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 186 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=209, Invalid=661, Unknown=0, NotChecked=0, Total=870 [2020-10-12 09:55:29,349 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2020-10-12 09:55:29,366 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 58. [2020-10-12 09:55:29,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-10-12 09:55:29,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 68 transitions. [2020-10-12 09:55:29,369 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 68 transitions. Word has length 34 [2020-10-12 09:55:29,371 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:55:29,371 INFO L479 AbstractCegarLoop]: Abstraction has 58 states and 68 transitions. [2020-10-12 09:55:29,371 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-12 09:55:29,371 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 68 transitions. [2020-10-12 09:55:29,373 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-10-12 09:55:29,373 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:55:29,373 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:55:29,373 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-12 09:55:29,373 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:55:29,374 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:55:29,374 INFO L82 PathProgramCache]: Analyzing trace with hash 1495788997, now seen corresponding path program 2 times [2020-10-12 09:55:29,375 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:55:29,375 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [368984531] [2020-10-12 09:55:29,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:55:29,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:55:29,392 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:55:29,399 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:55:29,416 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:55:29,423 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:55:29,784 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:55:31,689 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:55:31,690 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 46 [2020-10-12 09:55:31,690 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-12 09:55:31,690 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2299 [2020-10-12 09:55:31,690 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:55:31,691 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-12 09:55:31,691 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 09:55:31,691 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-10-12 09:55:31,693 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-12 09:55:32,031 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:55:32,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:55:32,034 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:55:32,036 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:55:32,036 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:55:32,036 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:55:32,036 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 09:55:32,036 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:55:32,037 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:55:32,037 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:55:32,037 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:55:32,037 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:55:32,038 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2020-10-12 09:55:32,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:55:32,040 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:55:32,042 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:55:32,043 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 09:55:32,043 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:55:32,043 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 09:55:32,043 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:55:32,043 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-12 09:55:32,043 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-12 09:55:32,044 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-12 09:55:32,044 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:55:32,108 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 09:55:32,109 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [368984531] [2020-10-12 09:55:32,109 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:55:32,109 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-12 09:55:32,110 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [260179088] [2020-10-12 09:55:32,110 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-12 09:55:32,110 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:55:32,111 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-12 09:55:32,111 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2020-10-12 09:55:32,111 INFO L87 Difference]: Start difference. First operand 58 states and 68 transitions. Second operand 15 states. [2020-10-12 09:55:32,705 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:55:32,705 INFO L93 Difference]: Finished difference Result 81 states and 97 transitions. [2020-10-12 09:55:32,706 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-12 09:55:32,706 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 36 [2020-10-12 09:55:32,706 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:55:32,707 INFO L225 Difference]: With dead ends: 81 [2020-10-12 09:55:32,707 INFO L226 Difference]: Without dead ends: 68 [2020-10-12 09:55:32,709 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=143, Invalid=507, Unknown=0, NotChecked=0, Total=650 [2020-10-12 09:55:32,709 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2020-10-12 09:55:32,719 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 62. [2020-10-12 09:55:32,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-10-12 09:55:32,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 70 transitions. [2020-10-12 09:55:32,721 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 70 transitions. Word has length 36 [2020-10-12 09:55:32,721 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:55:32,721 INFO L479 AbstractCegarLoop]: Abstraction has 62 states and 70 transitions. [2020-10-12 09:55:32,721 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-12 09:55:32,721 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 70 transitions. [2020-10-12 09:55:32,722 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-10-12 09:55:32,722 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:55:32,723 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:55:32,723 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-12 09:55:32,723 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:55:32,723 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:55:32,724 INFO L82 PathProgramCache]: Analyzing trace with hash -1284739642, now seen corresponding path program 4 times [2020-10-12 09:55:32,724 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:55:32,724 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [87948973] [2020-10-12 09:55:32,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:55:32,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:55:32,733 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:55:32,742 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:55:32,749 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:55:32,779 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:55:35,122 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:55:36,188 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:55:36,603 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:55:37,422 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:55:37,733 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:55:37,734 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 44 [2020-10-12 09:55:37,734 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-12 09:55:37,734 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-12 09:55:37,734 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:55:37,734 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-10-12 09:55:37,734 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 09:55:37,734 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-12 09:55:37,735 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:55:38,531 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:55:38,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:55:38,534 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:55:38,535 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:55:38,535 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:55:38,536 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:55:38,536 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 09:55:38,536 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:55:38,536 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:55:38,536 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:55:38,537 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:55:38,537 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:55:38,545 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-10-12 09:55:38,545 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [87948973] [2020-10-12 09:55:38,546 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:55:38,546 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-12 09:55:38,546 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1507720009] [2020-10-12 09:55:38,546 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-12 09:55:38,547 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:55:38,547 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-12 09:55:38,547 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=236, Unknown=0, NotChecked=0, Total=306 [2020-10-12 09:55:38,548 INFO L87 Difference]: Start difference. First operand 62 states and 70 transitions. Second operand 18 states. [2020-10-12 09:55:39,387 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:55:39,387 INFO L93 Difference]: Finished difference Result 123 states and 148 transitions. [2020-10-12 09:55:39,392 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-12 09:55:39,392 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 36 [2020-10-12 09:55:39,393 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:55:39,394 INFO L225 Difference]: With dead ends: 123 [2020-10-12 09:55:39,395 INFO L226 Difference]: Without dead ends: 121 [2020-10-12 09:55:39,396 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 4 SyntacticMatches, 3 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 238 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=253, Invalid=803, Unknown=0, NotChecked=0, Total=1056 [2020-10-12 09:55:39,397 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2020-10-12 09:55:39,412 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 76. [2020-10-12 09:55:39,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2020-10-12 09:55:39,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 91 transitions. [2020-10-12 09:55:39,413 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 91 transitions. Word has length 36 [2020-10-12 09:55:39,414 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:55:39,414 INFO L479 AbstractCegarLoop]: Abstraction has 76 states and 91 transitions. [2020-10-12 09:55:39,414 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-12 09:55:39,414 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 91 transitions. [2020-10-12 09:55:39,415 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-10-12 09:55:39,415 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:55:39,416 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:55:39,416 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-12 09:55:39,416 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:55:39,416 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:55:39,416 INFO L82 PathProgramCache]: Analyzing trace with hash -1738516287, now seen corresponding path program 3 times [2020-10-12 09:55:39,417 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:55:39,417 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [674401046] [2020-10-12 09:55:39,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:55:39,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:55:39,424 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:55:39,429 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:55:39,436 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:55:39,442 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:55:39,631 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:55:42,417 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:55:42,418 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 50 [2020-10-12 09:55:42,418 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-12 09:55:42,418 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2995 [2020-10-12 09:55:42,418 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:55:42,418 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 19 [2020-10-12 09:55:42,418 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 09:55:42,419 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-10-12 09:55:42,419 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:55:43,008 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:55:43,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:55:43,011 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:55:43,012 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:55:43,013 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:55:43,013 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:55:43,013 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 09:55:43,013 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:55:43,013 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:55:43,013 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:55:43,014 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:55:43,014 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:55:43,015 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2020-10-12 09:55:43,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:55:43,017 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:55:43,019 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:55:43,019 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 09:55:43,019 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:55:43,019 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 09:55:43,019 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:55:43,020 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-12 09:55:43,020 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-12 09:55:43,020 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-12 09:55:43,020 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:55:43,091 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 4 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 09:55:43,091 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [674401046] [2020-10-12 09:55:43,092 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:55:43,092 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-12 09:55:43,092 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [466014721] [2020-10-12 09:55:43,092 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-12 09:55:43,093 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:55:43,093 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-12 09:55:43,093 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=208, Unknown=0, NotChecked=0, Total=272 [2020-10-12 09:55:43,093 INFO L87 Difference]: Start difference. First operand 76 states and 91 transitions. Second operand 17 states. [2020-10-12 09:55:43,933 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:55:43,934 INFO L93 Difference]: Finished difference Result 100 states and 121 transitions. [2020-10-12 09:55:43,934 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-12 09:55:43,934 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 40 [2020-10-12 09:55:43,935 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:55:43,936 INFO L225 Difference]: With dead ends: 100 [2020-10-12 09:55:43,936 INFO L226 Difference]: Without dead ends: 87 [2020-10-12 09:55:43,939 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 4 SyntacticMatches, 4 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 133 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=189, Invalid=623, Unknown=0, NotChecked=0, Total=812 [2020-10-12 09:55:43,940 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2020-10-12 09:55:43,963 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 78. [2020-10-12 09:55:43,963 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2020-10-12 09:55:43,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 92 transitions. [2020-10-12 09:55:43,964 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 92 transitions. Word has length 40 [2020-10-12 09:55:43,965 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:55:43,965 INFO L479 AbstractCegarLoop]: Abstraction has 78 states and 92 transitions. [2020-10-12 09:55:43,965 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-12 09:55:43,965 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 92 transitions. [2020-10-12 09:55:43,966 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-10-12 09:55:43,966 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:55:43,966 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:55:43,967 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-12 09:55:43,967 INFO L427 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:55:43,967 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:55:43,967 INFO L82 PathProgramCache]: Analyzing trace with hash 1921477375, now seen corresponding path program 4 times [2020-10-12 09:55:43,968 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:55:43,968 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [30560494] [2020-10-12 09:55:43,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:55:43,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:55:43,975 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:55:43,980 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:55:43,986 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:55:43,991 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:55:44,649 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:55:47,337 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:55:47,337 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 52 [2020-10-12 09:55:47,338 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-12 09:55:47,338 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3364 [2020-10-12 09:55:47,338 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:55:47,338 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 21 [2020-10-12 09:55:47,338 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 09:55:47,338 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-12 09:55:47,339 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:55:48,035 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:55:48,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:55:48,038 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:55:48,039 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:55:48,039 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:55:48,039 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:55:48,039 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 09:55:48,039 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:55:48,039 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:55:48,040 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:55:48,040 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:55:48,040 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:55:48,041 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2020-10-12 09:55:48,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:55:48,042 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:55:48,044 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:55:48,045 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 09:55:48,045 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:55:48,045 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 09:55:48,045 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:55:48,046 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-12 09:55:48,046 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-12 09:55:48,046 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-12 09:55:48,046 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:55:48,094 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 4 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 09:55:48,094 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [30560494] [2020-10-12 09:55:48,094 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:55:48,094 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-12 09:55:48,095 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [319907488] [2020-10-12 09:55:48,095 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-12 09:55:48,095 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:55:48,096 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-12 09:55:48,096 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=231, Unknown=0, NotChecked=0, Total=306 [2020-10-12 09:55:48,096 INFO L87 Difference]: Start difference. First operand 78 states and 92 transitions. Second operand 18 states. [2020-10-12 09:55:49,031 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:55:49,031 INFO L93 Difference]: Finished difference Result 108 states and 131 transitions. [2020-10-12 09:55:49,031 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-12 09:55:49,032 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 42 [2020-10-12 09:55:49,032 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:55:49,034 INFO L225 Difference]: With dead ends: 108 [2020-10-12 09:55:49,034 INFO L226 Difference]: Without dead ends: 95 [2020-10-12 09:55:49,035 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 4 SyntacticMatches, 5 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 161 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=223, Invalid=707, Unknown=0, NotChecked=0, Total=930 [2020-10-12 09:55:49,035 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2020-10-12 09:55:49,050 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 85. [2020-10-12 09:55:49,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2020-10-12 09:55:49,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 100 transitions. [2020-10-12 09:55:49,052 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 100 transitions. Word has length 42 [2020-10-12 09:55:49,052 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:55:49,052 INFO L479 AbstractCegarLoop]: Abstraction has 85 states and 100 transitions. [2020-10-12 09:55:49,052 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-12 09:55:49,052 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 100 transitions. [2020-10-12 09:55:49,053 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2020-10-12 09:55:49,054 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:55:49,054 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:55:49,054 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-12 09:55:49,054 INFO L427 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:55:49,055 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:55:49,055 INFO L82 PathProgramCache]: Analyzing trace with hash 1597171133, now seen corresponding path program 5 times [2020-10-12 09:55:49,055 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:55:49,055 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1313540888] [2020-10-12 09:55:49,055 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:55:49,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:55:49,062 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:55:49,068 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:55:49,075 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:55:49,082 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:55:49,847 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:55:53,581 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:55:53,581 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 54 [2020-10-12 09:55:53,581 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-12 09:55:53,581 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4520 [2020-10-12 09:55:53,581 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:55:53,582 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 23 [2020-10-12 09:55:53,582 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 09:55:53,582 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-12 09:55:53,582 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:55:54,024 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:55:54,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:55:54,026 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:55:54,028 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:55:54,028 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:55:54,028 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:55:54,028 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 09:55:54,028 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:55:54,028 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:55:54,029 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:55:54,029 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:55:54,029 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:55:54,030 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2020-10-12 09:55:54,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:55:54,032 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:55:54,033 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:55:54,034 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 09:55:54,034 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:55:54,034 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 09:55:54,034 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:55:54,034 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-12 09:55:54,034 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-12 09:55:54,034 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-12 09:55:54,035 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:55:54,103 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 4 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 09:55:54,103 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1313540888] [2020-10-12 09:55:54,104 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:55:54,104 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-10-12 09:55:54,104 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [558254631] [2020-10-12 09:55:54,104 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-12 09:55:54,105 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:55:54,105 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-12 09:55:54,105 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=256, Unknown=0, NotChecked=0, Total=342 [2020-10-12 09:55:54,106 INFO L87 Difference]: Start difference. First operand 85 states and 100 transitions. Second operand 19 states. [2020-10-12 09:55:54,924 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:55:54,924 INFO L93 Difference]: Finished difference Result 155 states and 193 transitions. [2020-10-12 09:55:54,925 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-12 09:55:54,925 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 44 [2020-10-12 09:55:54,926 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:55:54,927 INFO L225 Difference]: With dead ends: 155 [2020-10-12 09:55:54,927 INFO L226 Difference]: Without dead ends: 142 [2020-10-12 09:55:54,928 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 5 SyntacticMatches, 5 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 155 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=257, Invalid=799, Unknown=0, NotChecked=0, Total=1056 [2020-10-12 09:55:54,929 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2020-10-12 09:55:54,942 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 89. [2020-10-12 09:55:54,942 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2020-10-12 09:55:54,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 105 transitions. [2020-10-12 09:55:54,943 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 105 transitions. Word has length 44 [2020-10-12 09:55:54,944 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:55:54,944 INFO L479 AbstractCegarLoop]: Abstraction has 89 states and 105 transitions. [2020-10-12 09:55:54,944 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-12 09:55:54,944 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 105 transitions. [2020-10-12 09:55:54,945 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-10-12 09:55:54,945 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:55:54,946 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:55:54,946 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-12 09:55:54,946 INFO L427 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:55:54,946 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:55:54,946 INFO L82 PathProgramCache]: Analyzing trace with hash -823482117, now seen corresponding path program 6 times [2020-10-12 09:55:54,947 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:55:54,947 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [128829804] [2020-10-12 09:55:54,947 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:55:54,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:55:54,954 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:55:54,959 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:55:54,967 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:55:54,974 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:55:55,782 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:55:59,954 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:55:59,955 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 56 [2020-10-12 09:55:59,955 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-12 09:55:59,955 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-12 09:55:59,955 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:55:59,955 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 25 [2020-10-12 09:55:59,955 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 09:55:59,955 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 34 [2020-10-12 09:55:59,955 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:56:01,064 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:56:01,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:56:01,066 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:56:01,067 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:56:01,067 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:56:01,067 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:56:01,067 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 09:56:01,067 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:56:01,068 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:56:01,068 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:56:01,068 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:56:01,068 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:56:01,069 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2020-10-12 09:56:01,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:56:01,070 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:56:01,073 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:56:01,073 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 09:56:01,073 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:56:01,073 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-12 09:56:01,073 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:56:01,074 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-12 09:56:01,074 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-12 09:56:01,074 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-12 09:56:01,074 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:56:01,118 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 4 proven. 52 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 09:56:01,118 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [128829804] [2020-10-12 09:56:01,118 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:56:01,118 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-10-12 09:56:01,119 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1892410144] [2020-10-12 09:56:01,119 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-12 09:56:01,119 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:56:01,120 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-12 09:56:01,120 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=339, Unknown=0, NotChecked=0, Total=462 [2020-10-12 09:56:01,120 INFO L87 Difference]: Start difference. First operand 89 states and 105 transitions. Second operand 22 states. [2020-10-12 09:56:01,920 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:56:01,920 INFO L93 Difference]: Finished difference Result 121 states and 148 transitions. [2020-10-12 09:56:01,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-10-12 09:56:01,921 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 46 [2020-10-12 09:56:01,921 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:56:01,923 INFO L225 Difference]: With dead ends: 121 [2020-10-12 09:56:01,923 INFO L226 Difference]: Without dead ends: 108 [2020-10-12 09:56:01,926 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 4 SyntacticMatches, 5 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 260 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=349, Invalid=1057, Unknown=0, NotChecked=0, Total=1406 [2020-10-12 09:56:01,927 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2020-10-12 09:56:01,947 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 93. [2020-10-12 09:56:01,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2020-10-12 09:56:01,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 110 transitions. [2020-10-12 09:56:01,949 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 110 transitions. Word has length 46 [2020-10-12 09:56:01,949 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:56:01,949 INFO L479 AbstractCegarLoop]: Abstraction has 93 states and 110 transitions. [2020-10-12 09:56:01,949 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-12 09:56:01,949 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 110 transitions. [2020-10-12 09:56:01,955 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-10-12 09:56:01,955 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:56:01,955 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:56:01,956 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-12 09:56:01,956 INFO L427 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:56:01,956 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:56:01,956 INFO L82 PathProgramCache]: Analyzing trace with hash 801019065, now seen corresponding path program 7 times [2020-10-12 09:56:01,957 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:56:01,957 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1579936782] [2020-10-12 09:56:01,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:56:01,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:56:01,967 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:56:01,972 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:56:01,979 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:56:01,985 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:56:03,270 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:56:06,972 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:56:06,972 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 58 [2020-10-12 09:56:06,972 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-12 09:56:06,972 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5006 [2020-10-12 09:56:06,972 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:56:06,972 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 27 [2020-10-12 09:56:06,972 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 09:56:06,973 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 36 [2020-10-12 09:56:06,973 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:56:08,245 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:56:08,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:56:08,247 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:56:08,248 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:56:08,248 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:56:08,248 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:56:08,248 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 09:56:08,248 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:56:08,248 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:56:08,249 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:56:08,249 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:56:08,249 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:56:08,250 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2020-10-12 09:56:08,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:56:08,251 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:56:08,253 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:56:08,253 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 09:56:08,254 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:56:08,254 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 09:56:08,254 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:56:08,254 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-12 09:56:08,254 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-12 09:56:08,254 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-12 09:56:08,254 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:56:08,330 INFO L134 CoverageAnalysis]: Checked inductivity of 71 backedges. 4 proven. 67 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 09:56:08,330 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1579936782] [2020-10-12 09:56:08,331 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:56:08,331 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-10-12 09:56:08,331 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [498458708] [2020-10-12 09:56:08,331 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-12 09:56:08,331 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:56:08,332 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-12 09:56:08,332 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=368, Unknown=0, NotChecked=0, Total=506 [2020-10-12 09:56:08,332 INFO L87 Difference]: Start difference. First operand 93 states and 110 transitions. Second operand 23 states. [2020-10-12 09:56:09,269 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:56:09,270 INFO L93 Difference]: Finished difference Result 126 states and 155 transitions. [2020-10-12 09:56:09,270 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-10-12 09:56:09,270 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 48 [2020-10-12 09:56:09,270 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:56:09,271 INFO L225 Difference]: With dead ends: 126 [2020-10-12 09:56:09,271 INFO L226 Difference]: Without dead ends: 113 [2020-10-12 09:56:09,273 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 4 SyntacticMatches, 6 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 292 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=394, Invalid=1166, Unknown=0, NotChecked=0, Total=1560 [2020-10-12 09:56:09,273 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2020-10-12 09:56:09,285 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 97. [2020-10-12 09:56:09,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2020-10-12 09:56:09,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 115 transitions. [2020-10-12 09:56:09,286 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 115 transitions. Word has length 48 [2020-10-12 09:56:09,287 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:56:09,287 INFO L479 AbstractCegarLoop]: Abstraction has 97 states and 115 transitions. [2020-10-12 09:56:09,287 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-12 09:56:09,287 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 115 transitions. [2020-10-12 09:56:09,288 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2020-10-12 09:56:09,288 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:56:09,288 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:56:09,288 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-12 09:56:09,288 INFO L427 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:56:09,289 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:56:09,289 INFO L82 PathProgramCache]: Analyzing trace with hash -1421440777, now seen corresponding path program 8 times [2020-10-12 09:56:09,289 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:56:09,289 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1254507363] [2020-10-12 09:56:09,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:56:09,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:56:09,296 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:56:09,301 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:56:09,308 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:56:09,314 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:56:10,561 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:56:14,301 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:56:14,301 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 60 [2020-10-12 09:56:14,302 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-12 09:56:14,302 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5006 [2020-10-12 09:56:14,302 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:56:14,302 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 29 [2020-10-12 09:56:14,302 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 09:56:14,302 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 38 [2020-10-12 09:56:14,302 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:56:15,795 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:56:15,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:56:15,797 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:56:15,798 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:56:15,798 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:56:15,798 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:56:15,798 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 09:56:15,799 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:56:15,799 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:56:15,799 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:56:15,799 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:56:15,799 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:56:15,800 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2020-10-12 09:56:15,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:56:15,802 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:56:15,805 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:56:15,805 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 09:56:15,805 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:56:15,805 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-12 09:56:15,806 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:56:15,806 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-12 09:56:15,806 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-12 09:56:15,806 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-12 09:56:15,806 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:56:15,866 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 4 proven. 84 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 09:56:15,867 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1254507363] [2020-10-12 09:56:15,867 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:56:15,867 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-10-12 09:56:15,867 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1126746236] [2020-10-12 09:56:15,868 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-12 09:56:15,868 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:56:15,869 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-12 09:56:15,869 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=140, Invalid=322, Unknown=0, NotChecked=0, Total=462 [2020-10-12 09:56:15,869 INFO L87 Difference]: Start difference. First operand 97 states and 115 transitions. Second operand 22 states. [2020-10-12 09:56:17,076 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:56:17,076 INFO L93 Difference]: Finished difference Result 131 states and 162 transitions. [2020-10-12 09:56:17,077 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-10-12 09:56:17,077 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 50 [2020-10-12 09:56:17,077 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:56:17,079 INFO L225 Difference]: With dead ends: 131 [2020-10-12 09:56:17,079 INFO L226 Difference]: Without dead ends: 118 [2020-10-12 09:56:17,081 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 4 SyntacticMatches, 9 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 292 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=385, Invalid=1021, Unknown=0, NotChecked=0, Total=1406 [2020-10-12 09:56:17,082 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2020-10-12 09:56:17,093 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 101. [2020-10-12 09:56:17,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2020-10-12 09:56:17,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 120 transitions. [2020-10-12 09:56:17,094 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 120 transitions. Word has length 50 [2020-10-12 09:56:17,094 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:56:17,094 INFO L479 AbstractCegarLoop]: Abstraction has 101 states and 120 transitions. [2020-10-12 09:56:17,095 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-12 09:56:17,095 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 120 transitions. [2020-10-12 09:56:17,095 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2020-10-12 09:56:17,095 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:56:17,096 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:56:17,096 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-12 09:56:17,096 INFO L427 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:56:17,096 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:56:17,096 INFO L82 PathProgramCache]: Analyzing trace with hash -1990255816, now seen corresponding path program 5 times [2020-10-12 09:56:17,097 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:56:17,097 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [142591789] [2020-10-12 09:56:17,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:56:17,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:56:17,104 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:56:17,109 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:56:17,117 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:56:17,741 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:56:22,106 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:56:22,106 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 58 [2020-10-12 09:56:22,106 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-12 09:56:22,106 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-12 09:56:22,107 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:56:22,107 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-12 09:56:22,107 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-12 09:56:22,107 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-12 09:56:22,107 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:56:22,159 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:56:22,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:56:22,162 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:56:22,162 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:56:22,163 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:56:22,163 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:56:22,163 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 09:56:22,163 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:56:22,163 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:56:22,163 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:56:22,163 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:56:22,163 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:56:22,166 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2020-10-12 09:56:22,166 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [142591789] [2020-10-12 09:56:22,166 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:56:22,166 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-12 09:56:22,166 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1081097998] [2020-10-12 09:56:22,167 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-12 09:56:22,167 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:56:22,167 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-12 09:56:22,167 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-10-12 09:56:22,167 INFO L87 Difference]: Start difference. First operand 101 states and 120 transitions. Second operand 9 states. [2020-10-12 09:56:22,352 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:56:22,352 INFO L93 Difference]: Finished difference Result 172 states and 214 transitions. [2020-10-12 09:56:22,353 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-12 09:56:22,353 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 50 [2020-10-12 09:56:22,353 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:56:22,354 INFO L225 Difference]: With dead ends: 172 [2020-10-12 09:56:22,354 INFO L226 Difference]: Without dead ends: 79 [2020-10-12 09:56:22,356 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-10-12 09:56:22,356 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2020-10-12 09:56:22,365 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 77. [2020-10-12 09:56:22,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2020-10-12 09:56:22,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 85 transitions. [2020-10-12 09:56:22,366 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 85 transitions. Word has length 50 [2020-10-12 09:56:22,366 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:56:22,366 INFO L479 AbstractCegarLoop]: Abstraction has 77 states and 85 transitions. [2020-10-12 09:56:22,366 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-12 09:56:22,366 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 85 transitions. [2020-10-12 09:56:22,366 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-10-12 09:56:22,367 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:56:22,367 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:56:22,367 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-12 09:56:22,367 INFO L427 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:56:22,367 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:56:22,367 INFO L82 PathProgramCache]: Analyzing trace with hash 1385759114, now seen corresponding path program 6 times [2020-10-12 09:56:22,367 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:56:22,367 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1306591365] [2020-10-12 09:56:22,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:56:22,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:56:22,381 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:56:22,400 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:56:22,414 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:56:23,780 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:56:27,378 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:56:27,378 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 69 [2020-10-12 09:56:27,378 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-12 09:56:27,379 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-12 09:56:27,379 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:56:27,379 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-12 09:56:27,379 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 33 [2020-10-12 09:56:27,379 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-12 09:56:27,379 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:56:27,437 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:56:27,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:56:27,439 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:56:27,440 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:56:27,441 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:56:27,441 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:56:27,441 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 09:56:27,441 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:56:27,441 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:56:27,441 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:56:27,441 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:56:27,441 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:56:27,445 INFO L134 CoverageAnalysis]: Checked inductivity of 129 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 93 trivial. 0 not checked. [2020-10-12 09:56:27,445 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1306591365] [2020-10-12 09:56:27,445 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:56:27,445 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-12 09:56:27,445 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2041846065] [2020-10-12 09:56:27,446 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-12 09:56:27,446 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:56:27,446 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-12 09:56:27,446 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2020-10-12 09:56:27,446 INFO L87 Difference]: Start difference. First operand 77 states and 85 transitions. Second operand 10 states. [2020-10-12 09:56:27,653 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:56:27,653 INFO L93 Difference]: Finished difference Result 148 states and 166 transitions. [2020-10-12 09:56:27,654 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-12 09:56:27,654 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 61 [2020-10-12 09:56:27,654 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:56:27,655 INFO L225 Difference]: With dead ends: 148 [2020-10-12 09:56:27,655 INFO L226 Difference]: Without dead ends: 84 [2020-10-12 09:56:27,656 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2020-10-12 09:56:27,656 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2020-10-12 09:56:27,669 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 82. [2020-10-12 09:56:27,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2020-10-12 09:56:27,670 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 89 transitions. [2020-10-12 09:56:27,670 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 89 transitions. Word has length 61 [2020-10-12 09:56:27,670 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:56:27,670 INFO L479 AbstractCegarLoop]: Abstraction has 82 states and 89 transitions. [2020-10-12 09:56:27,671 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-12 09:56:27,671 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 89 transitions. [2020-10-12 09:56:27,671 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2020-10-12 09:56:27,671 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:56:27,671 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:56:27,672 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-12 09:56:27,672 INFO L427 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:56:27,672 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:56:27,672 INFO L82 PathProgramCache]: Analyzing trace with hash 1895565740, now seen corresponding path program 7 times [2020-10-12 09:56:27,672 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:56:27,673 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [755611490] [2020-10-12 09:56:27,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:56:27,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:56:27,686 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:56:27,709 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:56:27,726 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:56:29,689 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:56:32,683 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:56:32,683 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 76 [2020-10-12 09:56:32,683 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-12 09:56:32,683 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-12 09:56:32,684 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:56:32,684 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-12 09:56:32,684 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-12 09:56:32,684 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-12 09:56:32,684 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:56:32,756 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:56:32,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:56:32,758 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:56:32,759 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:56:32,759 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:56:32,759 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:56:32,759 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 09:56:32,760 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:56:32,760 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:56:32,760 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:56:32,760 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:56:32,760 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:56:32,765 INFO L134 CoverageAnalysis]: Checked inductivity of 175 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2020-10-12 09:56:32,765 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [755611490] [2020-10-12 09:56:32,765 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:56:32,765 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-12 09:56:32,766 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1465888611] [2020-10-12 09:56:32,766 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-12 09:56:32,766 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:56:32,766 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-12 09:56:32,767 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2020-10-12 09:56:32,767 INFO L87 Difference]: Start difference. First operand 82 states and 89 transitions. Second operand 11 states. [2020-10-12 09:56:33,022 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:56:33,023 INFO L93 Difference]: Finished difference Result 157 states and 173 transitions. [2020-10-12 09:56:33,023 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-12 09:56:33,024 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 68 [2020-10-12 09:56:33,024 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:56:33,025 INFO L225 Difference]: With dead ends: 157 [2020-10-12 09:56:33,025 INFO L226 Difference]: Without dead ends: 89 [2020-10-12 09:56:33,026 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2020-10-12 09:56:33,027 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2020-10-12 09:56:33,055 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 87. [2020-10-12 09:56:33,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2020-10-12 09:56:33,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 93 transitions. [2020-10-12 09:56:33,057 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 93 transitions. Word has length 68 [2020-10-12 09:56:33,057 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:56:33,057 INFO L479 AbstractCegarLoop]: Abstraction has 87 states and 93 transitions. [2020-10-12 09:56:33,057 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-12 09:56:33,057 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 93 transitions. [2020-10-12 09:56:33,059 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2020-10-12 09:56:33,059 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:56:33,059 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:56:33,059 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-12 09:56:33,060 INFO L427 AbstractCegarLoop]: === Iteration 17 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:56:33,060 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:56:33,060 INFO L82 PathProgramCache]: Analyzing trace with hash -1749223170, now seen corresponding path program 8 times [2020-10-12 09:56:33,060 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:56:33,061 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [380957874] [2020-10-12 09:56:33,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:56:33,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:56:33,080 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:56:33,119 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:56:33,144 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:56:36,634 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:56:38,104 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:56:38,104 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 83 [2020-10-12 09:56:38,104 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-12 09:56:38,104 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5030 [2020-10-12 09:56:38,104 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:56:38,105 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-12 09:56:38,105 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 57 [2020-10-12 09:56:38,105 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-12 09:56:38,105 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:56:38,205 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:56:38,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:56:38,207 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:56:38,208 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:56:38,208 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:56:38,208 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:56:38,208 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 09:56:38,209 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:56:38,209 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:56:38,209 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:56:38,209 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:56:38,209 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:56:38,214 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 164 trivial. 0 not checked. [2020-10-12 09:56:38,215 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [380957874] [2020-10-12 09:56:38,215 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:56:38,215 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-12 09:56:38,215 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1726608634] [2020-10-12 09:56:38,216 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-12 09:56:38,216 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:56:38,216 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-12 09:56:38,216 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2020-10-12 09:56:38,216 INFO L87 Difference]: Start difference. First operand 87 states and 93 transitions. Second operand 12 states. [2020-10-12 09:56:38,458 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:56:38,459 INFO L93 Difference]: Finished difference Result 166 states and 180 transitions. [2020-10-12 09:56:38,459 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-12 09:56:38,459 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 75 [2020-10-12 09:56:38,459 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:56:38,460 INFO L225 Difference]: With dead ends: 166 [2020-10-12 09:56:38,460 INFO L226 Difference]: Without dead ends: 94 [2020-10-12 09:56:38,461 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2020-10-12 09:56:38,462 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2020-10-12 09:56:38,478 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 92. [2020-10-12 09:56:38,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2020-10-12 09:56:38,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 97 transitions. [2020-10-12 09:56:38,479 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 97 transitions. Word has length 75 [2020-10-12 09:56:38,479 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:56:38,479 INFO L479 AbstractCegarLoop]: Abstraction has 92 states and 97 transitions. [2020-10-12 09:56:38,479 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-12 09:56:38,480 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 97 transitions. [2020-10-12 09:56:38,480 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2020-10-12 09:56:38,480 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:56:38,480 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:56:38,481 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-12 09:56:38,481 INFO L427 AbstractCegarLoop]: === Iteration 18 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:56:38,481 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:56:38,481 INFO L82 PathProgramCache]: Analyzing trace with hash 1643836448, now seen corresponding path program 9 times [2020-10-12 09:56:38,481 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:56:38,482 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1432147067] [2020-10-12 09:56:38,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:56:38,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:56:38,504 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:56:38,538 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:56:38,560 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:56:43,507 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:56:43,507 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 90 [2020-10-12 09:56:43,507 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-12 09:56:43,507 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5008 [2020-10-12 09:56:43,508 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:56:43,508 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-12 09:56:43,508 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 22 [2020-10-12 09:56:43,508 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-12 09:56:43,508 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:56:43,600 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:56:43,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:56:43,601 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:56:43,603 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:56:43,603 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:56:43,603 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:56:43,603 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 09:56:43,603 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:56:43,603 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:56:43,603 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:56:43,603 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:56:43,604 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:56:43,607 INFO L134 CoverageAnalysis]: Checked inductivity of 288 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 207 trivial. 0 not checked. [2020-10-12 09:56:43,608 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1432147067] [2020-10-12 09:56:43,608 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:56:43,608 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-12 09:56:43,608 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2081039588] [2020-10-12 09:56:43,609 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-12 09:56:43,609 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:56:43,609 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-12 09:56:43,609 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2020-10-12 09:56:43,609 INFO L87 Difference]: Start difference. First operand 92 states and 97 transitions. Second operand 13 states. [2020-10-12 09:56:43,855 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:56:43,856 INFO L93 Difference]: Finished difference Result 173 states and 185 transitions. [2020-10-12 09:56:43,856 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-12 09:56:43,856 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 82 [2020-10-12 09:56:43,857 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:56:43,858 INFO L225 Difference]: With dead ends: 173 [2020-10-12 09:56:43,858 INFO L226 Difference]: Without dead ends: 97 [2020-10-12 09:56:43,859 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2020-10-12 09:56:43,859 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2020-10-12 09:56:43,873 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 94. [2020-10-12 09:56:43,874 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2020-10-12 09:56:43,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 98 transitions. [2020-10-12 09:56:43,874 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 98 transitions. Word has length 82 [2020-10-12 09:56:43,875 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:56:43,875 INFO L479 AbstractCegarLoop]: Abstraction has 94 states and 98 transitions. [2020-10-12 09:56:43,875 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-12 09:56:43,875 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 98 transitions. [2020-10-12 09:56:43,875 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2020-10-12 09:56:43,876 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:56:43,876 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:56:43,876 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-12 09:56:43,876 INFO L427 AbstractCegarLoop]: === Iteration 19 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:56:43,876 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:56:43,877 INFO L82 PathProgramCache]: Analyzing trace with hash 1732223602, now seen corresponding path program 10 times [2020-10-12 09:56:43,877 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:56:43,877 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1437806588] [2020-10-12 09:56:43,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:56:43,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:56:43,889 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:56:43,910 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:56:43,931 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:56:48,897 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:56:48,898 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 97 [2020-10-12 09:56:48,898 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-12 09:56:48,898 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5011 [2020-10-12 09:56:48,898 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:56:48,898 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-12 09:56:48,898 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 45 [2020-10-12 09:56:48,898 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-12 09:56:48,899 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:56:49,005 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:56:49,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:56:49,007 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:56:49,008 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:56:49,008 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:56:49,009 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:56:49,009 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 09:56:49,009 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:56:49,009 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:56:49,009 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:56:49,009 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:56:49,009 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:56:49,014 INFO L134 CoverageAnalysis]: Checked inductivity of 355 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 255 trivial. 0 not checked. [2020-10-12 09:56:49,014 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1437806588] [2020-10-12 09:56:49,014 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:56:49,014 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-12 09:56:49,015 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1485999248] [2020-10-12 09:56:49,015 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-12 09:56:49,015 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:56:49,015 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-12 09:56:49,016 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2020-10-12 09:56:49,016 INFO L87 Difference]: Start difference. First operand 94 states and 98 transitions. Second operand 14 states. [2020-10-12 09:56:49,255 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:56:49,255 INFO L93 Difference]: Finished difference Result 181 states and 192 transitions. [2020-10-12 09:56:49,256 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-12 09:56:49,256 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 89 [2020-10-12 09:56:49,256 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:56:49,257 INFO L225 Difference]: With dead ends: 181 [2020-10-12 09:56:49,258 INFO L226 Difference]: Without dead ends: 104 [2020-10-12 09:56:49,259 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2020-10-12 09:56:49,259 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2020-10-12 09:56:49,274 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 101. [2020-10-12 09:56:49,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2020-10-12 09:56:49,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 105 transitions. [2020-10-12 09:56:49,275 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 105 transitions. Word has length 89 [2020-10-12 09:56:49,275 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:56:49,275 INFO L479 AbstractCegarLoop]: Abstraction has 101 states and 105 transitions. [2020-10-12 09:56:49,275 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-12 09:56:49,275 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 105 transitions. [2020-10-12 09:56:49,276 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2020-10-12 09:56:49,276 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:56:49,276 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:56:49,276 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-12 09:56:49,276 INFO L427 AbstractCegarLoop]: === Iteration 20 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:56:49,277 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:56:49,277 INFO L82 PathProgramCache]: Analyzing trace with hash -2111467372, now seen corresponding path program 11 times [2020-10-12 09:56:49,277 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:56:49,277 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1704088102] [2020-10-12 09:56:49,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:56:49,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:56:49,292 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:56:49,321 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:56:49,339 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:56:54,305 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:56:54,305 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 104 [2020-10-12 09:56:54,305 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-12 09:56:54,305 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5017 [2020-10-12 09:56:54,305 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:56:54,305 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-12 09:56:54,306 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 09:56:54,306 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 13 [2020-10-12 09:56:54,306 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:56:54,439 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:56:54,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:56:54,441 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:56:54,442 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:56:54,442 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:56:54,443 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:56:54,443 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 09:56:54,443 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:56:54,443 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:56:54,444 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:56:54,444 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:56:54,444 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 09:56:54,457 INFO L134 CoverageAnalysis]: Checked inductivity of 429 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 363 trivial. 0 not checked. [2020-10-12 09:56:54,457 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1704088102] [2020-10-12 09:56:54,457 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:56:54,458 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-12 09:56:54,458 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1685747437] [2020-10-12 09:56:54,459 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-12 09:56:54,459 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:56:54,459 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-12 09:56:54,460 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210 [2020-10-12 09:56:54,460 INFO L87 Difference]: Start difference. First operand 101 states and 105 transitions. Second operand 15 states. [2020-10-12 09:56:54,823 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:56:54,823 INFO L93 Difference]: Finished difference Result 194 states and 205 transitions. [2020-10-12 09:56:54,824 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-12 09:56:54,824 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 96 [2020-10-12 09:56:54,824 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:56:54,825 INFO L225 Difference]: With dead ends: 194 [2020-10-12 09:56:54,825 INFO L226 Difference]: Without dead ends: 111 [2020-10-12 09:56:54,826 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210 [2020-10-12 09:56:54,826 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2020-10-12 09:56:54,851 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 108. [2020-10-12 09:56:54,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 108 states. [2020-10-12 09:56:54,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 112 transitions. [2020-10-12 09:56:54,852 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 112 transitions. Word has length 96 [2020-10-12 09:56:54,852 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:56:54,853 INFO L479 AbstractCegarLoop]: Abstraction has 108 states and 112 transitions. [2020-10-12 09:56:54,853 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-12 09:56:54,853 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 112 transitions. [2020-10-12 09:56:54,855 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2020-10-12 09:56:54,855 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:56:54,855 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:56:54,855 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-10-12 09:56:54,856 INFO L427 AbstractCegarLoop]: === Iteration 21 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:56:54,856 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:56:54,856 INFO L82 PathProgramCache]: Analyzing trace with hash -88736282, now seen corresponding path program 12 times [2020-10-12 09:56:54,856 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:56:54,857 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [828822568] [2020-10-12 09:56:54,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:56:54,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:56:54,880 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:56:54,943 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:56:54,988 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:56:59,942 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:56:59,943 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 111 [2020-10-12 09:56:59,943 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-12 09:56:59,943 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5069 [2020-10-12 09:56:59,943 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:56:59,943 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-12 09:56:59,943 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 25 [2020-10-12 09:56:59,943 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-12 09:56:59,943 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:57:00,080 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:57:00,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:57:00,082 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:57:00,083 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:57:00,083 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:57:00,083 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:57:00,083 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 09:57:00,083 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:57:00,083 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:57:00,083 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:57:00,083 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:57:00,084 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:57:00,089 INFO L134 CoverageAnalysis]: Checked inductivity of 510 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 366 trivial. 0 not checked. [2020-10-12 09:57:00,090 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [828822568] [2020-10-12 09:57:00,090 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:57:00,090 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-12 09:57:00,090 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2023056454] [2020-10-12 09:57:00,091 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-12 09:57:00,091 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:57:00,091 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-12 09:57:00,091 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=133, Unknown=0, NotChecked=0, Total=240 [2020-10-12 09:57:00,091 INFO L87 Difference]: Start difference. First operand 108 states and 112 transitions. Second operand 16 states. [2020-10-12 09:57:00,416 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:57:00,416 INFO L93 Difference]: Finished difference Result 207 states and 218 transitions. [2020-10-12 09:57:00,417 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-12 09:57:00,417 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 103 [2020-10-12 09:57:00,417 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:57:00,418 INFO L225 Difference]: With dead ends: 207 [2020-10-12 09:57:00,419 INFO L226 Difference]: Without dead ends: 118 [2020-10-12 09:57:00,419 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=107, Invalid=133, Unknown=0, NotChecked=0, Total=240 [2020-10-12 09:57:00,420 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2020-10-12 09:57:00,435 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 115. [2020-10-12 09:57:00,435 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 115 states. [2020-10-12 09:57:00,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 119 transitions. [2020-10-12 09:57:00,436 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 119 transitions. Word has length 103 [2020-10-12 09:57:00,436 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:57:00,436 INFO L479 AbstractCegarLoop]: Abstraction has 115 states and 119 transitions. [2020-10-12 09:57:00,437 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-12 09:57:00,437 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 119 transitions. [2020-10-12 09:57:00,438 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2020-10-12 09:57:00,438 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:57:00,438 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:57:00,438 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-10-12 09:57:00,438 INFO L427 AbstractCegarLoop]: === Iteration 22 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:57:00,438 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:57:00,439 INFO L82 PathProgramCache]: Analyzing trace with hash -1628381432, now seen corresponding path program 13 times [2020-10-12 09:57:00,439 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:57:00,439 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [262315756] [2020-10-12 09:57:00,439 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:57:00,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:57:00,454 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:57:00,493 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:57:00,513 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:57:05,489 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:57:05,489 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 118 [2020-10-12 09:57:05,489 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-12 09:57:05,489 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5039 [2020-10-12 09:57:05,490 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:57:05,490 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-12 09:57:05,490 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 09:57:05,490 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 15 [2020-10-12 09:57:05,490 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:57:05,634 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:57:05,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:57:05,636 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:57:05,637 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:57:05,638 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:57:05,638 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:57:05,638 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 09:57:05,638 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:57:05,638 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:57:05,638 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:57:05,639 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:57:05,639 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:57:05,645 INFO L134 CoverageAnalysis]: Checked inductivity of 598 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 507 trivial. 0 not checked. [2020-10-12 09:57:05,646 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [262315756] [2020-10-12 09:57:05,646 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:57:05,646 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-12 09:57:05,646 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1479054633] [2020-10-12 09:57:05,647 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-12 09:57:05,647 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:57:05,647 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-12 09:57:05,647 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=150, Unknown=0, NotChecked=0, Total=272 [2020-10-12 09:57:05,648 INFO L87 Difference]: Start difference. First operand 115 states and 119 transitions. Second operand 17 states. [2020-10-12 09:57:05,976 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:57:05,976 INFO L93 Difference]: Finished difference Result 220 states and 231 transitions. [2020-10-12 09:57:05,981 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-12 09:57:05,981 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 110 [2020-10-12 09:57:05,981 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:57:05,982 INFO L225 Difference]: With dead ends: 220 [2020-10-12 09:57:05,982 INFO L226 Difference]: Without dead ends: 125 [2020-10-12 09:57:05,983 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=122, Invalid=150, Unknown=0, NotChecked=0, Total=272 [2020-10-12 09:57:05,983 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2020-10-12 09:57:05,999 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 122. [2020-10-12 09:57:05,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 122 states. [2020-10-12 09:57:05,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 126 transitions. [2020-10-12 09:57:06,000 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 126 transitions. Word has length 110 [2020-10-12 09:57:06,000 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:57:06,000 INFO L479 AbstractCegarLoop]: Abstraction has 122 states and 126 transitions. [2020-10-12 09:57:06,000 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-12 09:57:06,000 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 126 transitions. [2020-10-12 09:57:06,001 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2020-10-12 09:57:06,001 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:57:06,001 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:57:06,001 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-10-12 09:57:06,001 INFO L427 AbstractCegarLoop]: === Iteration 23 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:57:06,001 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:57:06,001 INFO L82 PathProgramCache]: Analyzing trace with hash 674564954, now seen corresponding path program 14 times [2020-10-12 09:57:06,002 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:57:06,002 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [106798689] [2020-10-12 09:57:06,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:57:06,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:57:06,014 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:57:06,041 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:57:06,063 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:57:11,124 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:57:11,125 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 125 [2020-10-12 09:57:11,125 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-12 09:57:11,125 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5114 [2020-10-12 09:57:11,125 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:57:11,125 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-12 09:57:11,125 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 27 [2020-10-12 09:57:11,125 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-12 09:57:11,125 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:57:11,294 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:57:11,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:57:11,296 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:57:11,297 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:57:11,297 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:57:11,297 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:57:11,297 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 09:57:11,297 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:57:11,297 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:57:11,297 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:57:11,298 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:57:11,298 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:57:11,306 INFO L134 CoverageAnalysis]: Checked inductivity of 693 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 497 trivial. 0 not checked. [2020-10-12 09:57:11,306 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [106798689] [2020-10-12 09:57:11,306 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:57:11,307 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-12 09:57:11,307 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1134184477] [2020-10-12 09:57:11,307 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-12 09:57:11,308 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:57:11,309 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-12 09:57:11,309 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2020-10-12 09:57:11,309 INFO L87 Difference]: Start difference. First operand 122 states and 126 transitions. Second operand 18 states. [2020-10-12 09:57:11,646 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:57:11,646 INFO L93 Difference]: Finished difference Result 233 states and 244 transitions. [2020-10-12 09:57:11,646 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-12 09:57:11,647 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 117 [2020-10-12 09:57:11,647 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:57:11,648 INFO L225 Difference]: With dead ends: 233 [2020-10-12 09:57:11,648 INFO L226 Difference]: Without dead ends: 132 [2020-10-12 09:57:11,649 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2020-10-12 09:57:11,650 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2020-10-12 09:57:11,670 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 129. [2020-10-12 09:57:11,670 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 129 states. [2020-10-12 09:57:11,671 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 133 transitions. [2020-10-12 09:57:11,671 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 133 transitions. Word has length 117 [2020-10-12 09:57:11,671 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:57:11,671 INFO L479 AbstractCegarLoop]: Abstraction has 129 states and 133 transitions. [2020-10-12 09:57:11,671 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-12 09:57:11,671 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 133 transitions. [2020-10-12 09:57:11,672 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2020-10-12 09:57:11,672 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:57:11,673 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 15, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:57:11,673 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-10-12 09:57:11,673 INFO L427 AbstractCegarLoop]: === Iteration 24 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:57:11,673 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:57:11,673 INFO L82 PathProgramCache]: Analyzing trace with hash -363733124, now seen corresponding path program 15 times [2020-10-12 09:57:11,673 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:57:11,674 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [271406187] [2020-10-12 09:57:11,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:57:11,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:57:11,691 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:57:11,761 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:57:11,806 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:57:16,784 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:57:16,784 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 132 [2020-10-12 09:57:16,784 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-12 09:57:16,785 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5098 [2020-10-12 09:57:16,785 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:57:16,785 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-12 09:57:16,785 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 28 [2020-10-12 09:57:16,785 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-12 09:57:16,785 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:57:16,988 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:57:16,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:57:16,990 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:57:16,991 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:57:16,991 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:57:16,991 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:57:16,991 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 09:57:16,992 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:57:16,992 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:57:16,992 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:57:16,992 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:57:16,993 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 09:57:17,013 INFO L134 CoverageAnalysis]: Checked inductivity of 795 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 570 trivial. 0 not checked. [2020-10-12 09:57:17,013 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [271406187] [2020-10-12 09:57:17,014 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:57:17,014 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-10-12 09:57:17,014 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [535179802] [2020-10-12 09:57:17,015 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-12 09:57:17,015 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:57:17,017 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-12 09:57:17,017 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=187, Unknown=0, NotChecked=0, Total=342 [2020-10-12 09:57:17,017 INFO L87 Difference]: Start difference. First operand 129 states and 133 transitions. Second operand 19 states. [2020-10-12 09:57:17,406 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:57:17,406 INFO L93 Difference]: Finished difference Result 246 states and 257 transitions. [2020-10-12 09:57:17,407 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-12 09:57:17,407 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 124 [2020-10-12 09:57:17,407 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:57:17,408 INFO L225 Difference]: With dead ends: 246 [2020-10-12 09:57:17,408 INFO L226 Difference]: Without dead ends: 139 [2020-10-12 09:57:17,411 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=155, Invalid=187, Unknown=0, NotChecked=0, Total=342 [2020-10-12 09:57:17,411 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2020-10-12 09:57:17,434 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 136. [2020-10-12 09:57:17,435 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 136 states. [2020-10-12 09:57:17,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 140 transitions. [2020-10-12 09:57:17,436 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 140 transitions. Word has length 124 [2020-10-12 09:57:17,436 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:57:17,436 INFO L479 AbstractCegarLoop]: Abstraction has 136 states and 140 transitions. [2020-10-12 09:57:17,436 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-12 09:57:17,436 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 140 transitions. [2020-10-12 09:57:17,437 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2020-10-12 09:57:17,437 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:57:17,437 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 16, 16, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:57:17,438 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-10-12 09:57:17,438 INFO L427 AbstractCegarLoop]: === Iteration 25 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:57:17,438 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:57:17,438 INFO L82 PathProgramCache]: Analyzing trace with hash -1571697970, now seen corresponding path program 16 times [2020-10-12 09:57:17,439 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:57:17,439 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2096960945] [2020-10-12 09:57:17,439 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:57:17,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:57:17,461 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:57:17,536 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:57:17,575 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:57:22,604 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:57:22,604 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 139 [2020-10-12 09:57:22,605 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-12 09:57:22,605 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5150 [2020-10-12 09:57:22,605 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:57:22,605 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-12 09:57:22,605 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 63 [2020-10-12 09:57:22,605 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 34 [2020-10-12 09:57:22,605 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:57:22,824 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:57:22,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:57:22,826 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:57:22,827 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:57:22,828 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:57:22,828 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:57:22,829 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 09:57:22,829 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:57:22,829 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:57:22,830 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:57:22,830 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:57:22,830 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 09:57:22,866 INFO L134 CoverageAnalysis]: Checked inductivity of 904 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 648 trivial. 0 not checked. [2020-10-12 09:57:22,867 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2096960945] [2020-10-12 09:57:22,867 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:57:22,867 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-10-12 09:57:22,867 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1269107112] [2020-10-12 09:57:22,868 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-12 09:57:22,868 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:57:22,870 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-12 09:57:22,871 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=207, Unknown=0, NotChecked=0, Total=380 [2020-10-12 09:57:22,871 INFO L87 Difference]: Start difference. First operand 136 states and 140 transitions. Second operand 20 states. [2020-10-12 09:57:23,239 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:57:23,240 INFO L93 Difference]: Finished difference Result 259 states and 270 transitions. [2020-10-12 09:57:23,240 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-12 09:57:23,241 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 131 [2020-10-12 09:57:23,241 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:57:23,242 INFO L225 Difference]: With dead ends: 259 [2020-10-12 09:57:23,242 INFO L226 Difference]: Without dead ends: 146 [2020-10-12 09:57:23,243 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=173, Invalid=207, Unknown=0, NotChecked=0, Total=380 [2020-10-12 09:57:23,244 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2020-10-12 09:57:23,264 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 143. [2020-10-12 09:57:23,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 143 states. [2020-10-12 09:57:23,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 147 transitions. [2020-10-12 09:57:23,265 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 147 transitions. Word has length 131 [2020-10-12 09:57:23,265 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:57:23,266 INFO L479 AbstractCegarLoop]: Abstraction has 143 states and 147 transitions. [2020-10-12 09:57:23,266 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-12 09:57:23,266 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 147 transitions. [2020-10-12 09:57:23,266 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2020-10-12 09:57:23,266 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:57:23,267 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 17, 17, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:57:23,267 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-10-12 09:57:23,267 INFO L427 AbstractCegarLoop]: === Iteration 26 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:57:23,267 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:57:23,267 INFO L82 PathProgramCache]: Analyzing trace with hash 985502192, now seen corresponding path program 17 times [2020-10-12 09:57:23,268 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:57:23,268 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1901670437] [2020-10-12 09:57:23,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:57:23,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:57:23,286 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:57:23,348 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:57:23,375 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:57:28,351 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:57:28,351 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 146 [2020-10-12 09:57:28,352 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-12 09:57:28,352 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5071 [2020-10-12 09:57:28,352 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:57:28,352 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 19 [2020-10-12 09:57:28,352 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 66 [2020-10-12 09:57:28,352 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 36 [2020-10-12 09:57:28,352 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:57:28,604 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:57:28,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:57:28,608 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:57:28,608 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:57:28,608 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:57:28,609 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:57:28,609 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 09:57:28,609 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:57:28,609 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:57:28,609 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:57:28,609 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:57:28,609 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:57:28,618 INFO L134 CoverageAnalysis]: Checked inductivity of 1020 backedges. 0 proven. 289 refuted. 0 times theorem prover too weak. 731 trivial. 0 not checked. [2020-10-12 09:57:28,618 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1901670437] [2020-10-12 09:57:28,618 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:57:28,618 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-10-12 09:57:28,618 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [133463080] [2020-10-12 09:57:28,619 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-12 09:57:28,619 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:57:28,620 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-12 09:57:28,621 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=192, Invalid=228, Unknown=0, NotChecked=0, Total=420 [2020-10-12 09:57:28,621 INFO L87 Difference]: Start difference. First operand 143 states and 147 transitions. Second operand 21 states. [2020-10-12 09:57:29,078 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:57:29,078 INFO L93 Difference]: Finished difference Result 272 states and 283 transitions. [2020-10-12 09:57:29,078 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-12 09:57:29,079 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 138 [2020-10-12 09:57:29,079 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:57:29,079 INFO L225 Difference]: With dead ends: 272 [2020-10-12 09:57:29,080 INFO L226 Difference]: Without dead ends: 153 [2020-10-12 09:57:29,080 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=192, Invalid=228, Unknown=0, NotChecked=0, Total=420 [2020-10-12 09:57:29,080 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2020-10-12 09:57:29,098 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 150. [2020-10-12 09:57:29,098 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 150 states. [2020-10-12 09:57:29,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 154 transitions. [2020-10-12 09:57:29,099 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 154 transitions. Word has length 138 [2020-10-12 09:57:29,099 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:57:29,099 INFO L479 AbstractCegarLoop]: Abstraction has 150 states and 154 transitions. [2020-10-12 09:57:29,099 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-12 09:57:29,099 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 154 transitions. [2020-10-12 09:57:29,100 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2020-10-12 09:57:29,100 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:57:29,100 INFO L422 BasicCegarLoop]: trace histogram [18, 18, 18, 18, 18, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:57:29,100 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-10-12 09:57:29,100 INFO L427 AbstractCegarLoop]: === Iteration 27 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:57:29,100 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:57:29,100 INFO L82 PathProgramCache]: Analyzing trace with hash 941702210, now seen corresponding path program 18 times [2020-10-12 09:57:29,101 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:57:29,101 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1748752066] [2020-10-12 09:57:29,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:57:29,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:57:29,118 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:57:29,166 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:57:29,192 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:57:34,166 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:57:34,166 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 153 [2020-10-12 09:57:34,167 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-12 09:57:34,167 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5054 [2020-10-12 09:57:34,167 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:57:34,167 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-10-12 09:57:34,167 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 69 [2020-10-12 09:57:34,167 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 38 [2020-10-12 09:57:34,167 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:57:34,431 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:57:34,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:57:34,433 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:57:34,434 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:57:34,434 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:57:34,434 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:57:34,435 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 09:57:34,435 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:57:34,435 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:57:34,435 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:57:34,435 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:57:34,435 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:57:34,449 INFO L134 CoverageAnalysis]: Checked inductivity of 1143 backedges. 0 proven. 324 refuted. 0 times theorem prover too weak. 819 trivial. 0 not checked. [2020-10-12 09:57:34,449 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1748752066] [2020-10-12 09:57:34,449 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:57:34,449 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-10-12 09:57:34,449 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [835204857] [2020-10-12 09:57:34,450 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-12 09:57:34,450 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:57:34,450 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-12 09:57:34,451 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=212, Invalid=250, Unknown=0, NotChecked=0, Total=462 [2020-10-12 09:57:34,451 INFO L87 Difference]: Start difference. First operand 150 states and 154 transitions. Second operand 22 states. [2020-10-12 09:57:34,897 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:57:34,898 INFO L93 Difference]: Finished difference Result 285 states and 296 transitions. [2020-10-12 09:57:34,898 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-12 09:57:34,898 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 145 [2020-10-12 09:57:34,899 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:57:34,900 INFO L225 Difference]: With dead ends: 285 [2020-10-12 09:57:34,900 INFO L226 Difference]: Without dead ends: 160 [2020-10-12 09:57:34,901 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=212, Invalid=250, Unknown=0, NotChecked=0, Total=462 [2020-10-12 09:57:34,902 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2020-10-12 09:57:34,925 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 157. [2020-10-12 09:57:34,925 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 157 states. [2020-10-12 09:57:34,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 161 transitions. [2020-10-12 09:57:34,926 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 161 transitions. Word has length 145 [2020-10-12 09:57:34,926 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:57:34,927 INFO L479 AbstractCegarLoop]: Abstraction has 157 states and 161 transitions. [2020-10-12 09:57:34,927 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-12 09:57:34,927 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 161 transitions. [2020-10-12 09:57:34,927 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2020-10-12 09:57:34,928 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:57:34,928 INFO L422 BasicCegarLoop]: trace histogram [19, 19, 19, 19, 19, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:57:34,928 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-10-12 09:57:34,928 INFO L427 AbstractCegarLoop]: === Iteration 28 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:57:34,928 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:57:34,928 INFO L82 PathProgramCache]: Analyzing trace with hash 1260975716, now seen corresponding path program 19 times [2020-10-12 09:57:34,929 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:57:34,929 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1338686291] [2020-10-12 09:57:34,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:57:34,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:57:34,947 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:57:34,998 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:57:35,024 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:57:39,942 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:57:39,942 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 160 [2020-10-12 09:57:39,942 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-12 09:57:39,942 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-12 09:57:39,942 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:57:39,942 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 21 [2020-10-12 09:57:39,942 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 72 [2020-10-12 09:57:39,943 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 40 [2020-10-12 09:57:39,943 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:57:40,236 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:57:40,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:57:40,237 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:57:40,238 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:57:40,239 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:57:40,239 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:57:40,239 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 09:57:40,239 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:57:40,239 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:57:40,240 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:57:40,240 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:57:40,240 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:57:40,256 INFO L134 CoverageAnalysis]: Checked inductivity of 1273 backedges. 0 proven. 361 refuted. 0 times theorem prover too weak. 912 trivial. 0 not checked. [2020-10-12 09:57:40,256 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1338686291] [2020-10-12 09:57:40,256 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:57:40,256 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-10-12 09:57:40,257 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2018936083] [2020-10-12 09:57:40,257 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-12 09:57:40,257 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:57:40,258 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-12 09:57:40,258 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=233, Invalid=273, Unknown=0, NotChecked=0, Total=506 [2020-10-12 09:57:40,258 INFO L87 Difference]: Start difference. First operand 157 states and 161 transitions. Second operand 23 states. [2020-10-12 09:57:40,743 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:57:40,743 INFO L93 Difference]: Finished difference Result 298 states and 309 transitions. [2020-10-12 09:57:40,744 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-12 09:57:40,744 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 152 [2020-10-12 09:57:40,745 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:57:40,746 INFO L225 Difference]: With dead ends: 298 [2020-10-12 09:57:40,746 INFO L226 Difference]: Without dead ends: 167 [2020-10-12 09:57:40,747 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=233, Invalid=273, Unknown=0, NotChecked=0, Total=506 [2020-10-12 09:57:40,748 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2020-10-12 09:57:40,790 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 164. [2020-10-12 09:57:40,791 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 164 states. [2020-10-12 09:57:40,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 168 transitions. [2020-10-12 09:57:40,792 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 168 transitions. Word has length 152 [2020-10-12 09:57:40,792 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:57:40,792 INFO L479 AbstractCegarLoop]: Abstraction has 164 states and 168 transitions. [2020-10-12 09:57:40,792 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-12 09:57:40,793 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 168 transitions. [2020-10-12 09:57:40,793 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 160 [2020-10-12 09:57:40,794 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:57:40,794 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:57:40,794 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2020-10-12 09:57:40,794 INFO L427 AbstractCegarLoop]: === Iteration 29 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:57:40,794 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:57:40,795 INFO L82 PathProgramCache]: Analyzing trace with hash 356016054, now seen corresponding path program 20 times [2020-10-12 09:57:40,795 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:57:40,795 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2118028913] [2020-10-12 09:57:40,795 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:57:40,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:57:40,836 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:57:40,902 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:57:40,996 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:57:45,952 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:57:45,952 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 167 [2020-10-12 09:57:45,953 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-12 09:57:45,953 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5131 [2020-10-12 09:57:45,953 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:57:45,953 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 22 [2020-10-12 09:57:45,953 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 75 [2020-10-12 09:57:45,953 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 42 [2020-10-12 09:57:45,953 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:57:46,264 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:57:46,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:57:46,266 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:57:46,267 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:57:46,268 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:57:46,268 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:57:46,268 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 09:57:46,268 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:57:46,269 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:57:46,269 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:57:46,269 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:57:46,269 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:57:46,283 INFO L134 CoverageAnalysis]: Checked inductivity of 1410 backedges. 0 proven. 400 refuted. 0 times theorem prover too weak. 1010 trivial. 0 not checked. [2020-10-12 09:57:46,283 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2118028913] [2020-10-12 09:57:46,284 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:57:46,284 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2020-10-12 09:57:46,284 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1697555790] [2020-10-12 09:57:46,284 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-12 09:57:46,284 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:57:46,284 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-12 09:57:46,285 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=255, Invalid=297, Unknown=0, NotChecked=0, Total=552 [2020-10-12 09:57:46,285 INFO L87 Difference]: Start difference. First operand 164 states and 168 transitions. Second operand 24 states. [2020-10-12 09:57:46,718 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:57:46,718 INFO L93 Difference]: Finished difference Result 311 states and 322 transitions. [2020-10-12 09:57:46,719 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-12 09:57:46,719 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 159 [2020-10-12 09:57:46,719 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:57:46,720 INFO L225 Difference]: With dead ends: 311 [2020-10-12 09:57:46,721 INFO L226 Difference]: Without dead ends: 174 [2020-10-12 09:57:46,722 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=255, Invalid=297, Unknown=0, NotChecked=0, Total=552 [2020-10-12 09:57:46,722 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 174 states. [2020-10-12 09:57:46,747 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 174 to 171. [2020-10-12 09:57:46,747 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 171 states. [2020-10-12 09:57:46,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 175 transitions. [2020-10-12 09:57:46,749 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 175 transitions. Word has length 159 [2020-10-12 09:57:46,749 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:57:46,749 INFO L479 AbstractCegarLoop]: Abstraction has 171 states and 175 transitions. [2020-10-12 09:57:46,749 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-12 09:57:46,749 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 175 transitions. [2020-10-12 09:57:46,750 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 167 [2020-10-12 09:57:46,750 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:57:46,750 INFO L422 BasicCegarLoop]: trace histogram [21, 21, 21, 21, 21, 21, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:57:46,750 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2020-10-12 09:57:46,751 INFO L427 AbstractCegarLoop]: === Iteration 30 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:57:46,751 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:57:46,751 INFO L82 PathProgramCache]: Analyzing trace with hash -83292968, now seen corresponding path program 21 times [2020-10-12 09:57:46,751 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:57:46,751 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1058978852] [2020-10-12 09:57:46,751 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:57:46,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:57:46,778 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:57:46,841 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:57:46,946 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:57:51,884 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:57:51,885 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 174 [2020-10-12 09:57:51,885 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-12 09:57:51,885 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5116 [2020-10-12 09:57:51,885 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:57:51,885 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 23 [2020-10-12 09:57:51,885 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 78 [2020-10-12 09:57:51,885 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 44 [2020-10-12 09:57:51,885 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:57:52,230 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:57:52,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:57:52,232 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:57:52,233 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:57:52,233 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:57:52,234 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:57:52,234 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 09:57:52,234 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:57:52,234 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:57:52,234 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:57:52,234 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:57:52,235 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:57:52,252 INFO L134 CoverageAnalysis]: Checked inductivity of 1554 backedges. 0 proven. 441 refuted. 0 times theorem prover too weak. 1113 trivial. 0 not checked. [2020-10-12 09:57:52,253 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1058978852] [2020-10-12 09:57:52,256 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:57:52,256 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2020-10-12 09:57:52,257 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1628594984] [2020-10-12 09:57:52,257 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-12 09:57:52,258 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:57:52,258 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-12 09:57:52,258 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=278, Invalid=322, Unknown=0, NotChecked=0, Total=600 [2020-10-12 09:57:52,258 INFO L87 Difference]: Start difference. First operand 171 states and 175 transitions. Second operand 25 states. [2020-10-12 09:57:52,712 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:57:52,712 INFO L93 Difference]: Finished difference Result 324 states and 335 transitions. [2020-10-12 09:57:52,712 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-12 09:57:52,712 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 166 [2020-10-12 09:57:52,712 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:57:52,713 INFO L225 Difference]: With dead ends: 324 [2020-10-12 09:57:52,713 INFO L226 Difference]: Without dead ends: 181 [2020-10-12 09:57:52,714 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=278, Invalid=322, Unknown=0, NotChecked=0, Total=600 [2020-10-12 09:57:52,715 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 181 states. [2020-10-12 09:57:52,742 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 181 to 178. [2020-10-12 09:57:52,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 178 states. [2020-10-12 09:57:52,743 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 178 states to 178 states and 182 transitions. [2020-10-12 09:57:52,743 INFO L78 Accepts]: Start accepts. Automaton has 178 states and 182 transitions. Word has length 166 [2020-10-12 09:57:52,743 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:57:52,744 INFO L479 AbstractCegarLoop]: Abstraction has 178 states and 182 transitions. [2020-10-12 09:57:52,744 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-12 09:57:52,744 INFO L276 IsEmpty]: Start isEmpty. Operand 178 states and 182 transitions. [2020-10-12 09:57:52,745 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 174 [2020-10-12 09:57:52,745 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:57:52,745 INFO L422 BasicCegarLoop]: trace histogram [22, 22, 22, 22, 22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:57:52,745 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2020-10-12 09:57:52,745 INFO L427 AbstractCegarLoop]: === Iteration 31 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:57:52,746 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:57:52,746 INFO L82 PathProgramCache]: Analyzing trace with hash 28063018, now seen corresponding path program 22 times [2020-10-12 09:57:52,746 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:57:52,746 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1299282236] [2020-10-12 09:57:52,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:57:52,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:57:52,776 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:57:52,844 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:57:52,913 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:57:57,967 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:57:57,967 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 181 [2020-10-12 09:57:57,967 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-12 09:57:57,967 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5201 [2020-10-12 09:57:57,967 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:57:57,968 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 24 [2020-10-12 09:57:57,968 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 81 [2020-10-12 09:57:57,968 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 46 [2020-10-12 09:57:57,968 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:57:58,313 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:57:58,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:57:58,315 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:57:58,316 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:57:58,316 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:57:58,316 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:57:58,316 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 09:57:58,316 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:57:58,317 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:57:58,317 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:57:58,317 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:57:58,317 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:57:58,330 INFO L134 CoverageAnalysis]: Checked inductivity of 1705 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 1221 trivial. 0 not checked. [2020-10-12 09:57:58,330 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1299282236] [2020-10-12 09:57:58,330 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:57:58,331 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2020-10-12 09:57:58,331 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [95208533] [2020-10-12 09:57:58,331 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-10-12 09:57:58,331 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:57:58,331 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-10-12 09:57:58,332 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=302, Invalid=348, Unknown=0, NotChecked=0, Total=650 [2020-10-12 09:57:58,332 INFO L87 Difference]: Start difference. First operand 178 states and 182 transitions. Second operand 26 states. [2020-10-12 09:57:58,796 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:57:58,796 INFO L93 Difference]: Finished difference Result 337 states and 348 transitions. [2020-10-12 09:57:58,796 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-12 09:57:58,797 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 173 [2020-10-12 09:57:58,797 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:57:58,798 INFO L225 Difference]: With dead ends: 337 [2020-10-12 09:57:58,799 INFO L226 Difference]: Without dead ends: 188 [2020-10-12 09:57:58,800 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=302, Invalid=348, Unknown=0, NotChecked=0, Total=650 [2020-10-12 09:57:58,800 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 188 states. [2020-10-12 09:57:58,830 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 188 to 185. [2020-10-12 09:57:58,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 185 states. [2020-10-12 09:57:58,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 185 states to 185 states and 189 transitions. [2020-10-12 09:57:58,832 INFO L78 Accepts]: Start accepts. Automaton has 185 states and 189 transitions. Word has length 173 [2020-10-12 09:57:58,832 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:57:58,832 INFO L479 AbstractCegarLoop]: Abstraction has 185 states and 189 transitions. [2020-10-12 09:57:58,832 INFO L480 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-10-12 09:57:58,832 INFO L276 IsEmpty]: Start isEmpty. Operand 185 states and 189 transitions. [2020-10-12 09:57:58,833 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 181 [2020-10-12 09:57:58,834 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:57:58,834 INFO L422 BasicCegarLoop]: trace histogram [23, 23, 23, 23, 23, 23, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:57:58,834 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2020-10-12 09:57:58,834 INFO L427 AbstractCegarLoop]: === Iteration 32 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:57:58,834 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:57:58,835 INFO L82 PathProgramCache]: Analyzing trace with hash -1907174068, now seen corresponding path program 23 times [2020-10-12 09:57:58,835 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:57:58,835 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [711774125] [2020-10-12 09:57:58,835 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:57:58,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:57:58,869 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:57:59,014 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:57:59,192 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:58:03,970 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:58:03,970 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 188 [2020-10-12 09:58:03,970 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-12 09:58:03,970 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5115 [2020-10-12 09:58:03,970 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:58:03,970 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 25 [2020-10-12 09:58:03,971 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 36 [2020-10-12 09:58:03,971 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 48 [2020-10-12 09:58:03,971 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:58:04,370 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:58:04,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:58:04,372 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:58:04,373 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:58:04,373 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:58:04,373 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:58:04,373 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 09:58:04,374 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:58:04,374 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:58:04,374 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:58:04,374 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:58:04,374 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:58:04,389 INFO L134 CoverageAnalysis]: Checked inductivity of 1863 backedges. 0 proven. 529 refuted. 0 times theorem prover too weak. 1334 trivial. 0 not checked. [2020-10-12 09:58:04,389 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [711774125] [2020-10-12 09:58:04,389 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:58:04,389 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2020-10-12 09:58:04,390 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [920981176] [2020-10-12 09:58:04,390 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-10-12 09:58:04,390 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:58:04,390 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-10-12 09:58:04,391 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=327, Invalid=375, Unknown=0, NotChecked=0, Total=702 [2020-10-12 09:58:04,391 INFO L87 Difference]: Start difference. First operand 185 states and 189 transitions. Second operand 27 states. [2020-10-12 09:58:04,862 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:58:04,863 INFO L93 Difference]: Finished difference Result 350 states and 361 transitions. [2020-10-12 09:58:04,863 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-12 09:58:04,863 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 180 [2020-10-12 09:58:04,864 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:58:04,865 INFO L225 Difference]: With dead ends: 350 [2020-10-12 09:58:04,868 INFO L226 Difference]: Without dead ends: 195 [2020-10-12 09:58:04,869 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=327, Invalid=375, Unknown=0, NotChecked=0, Total=702 [2020-10-12 09:58:04,869 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 195 states. [2020-10-12 09:58:04,890 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 195 to 192. [2020-10-12 09:58:04,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 192 states. [2020-10-12 09:58:04,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 192 states to 192 states and 196 transitions. [2020-10-12 09:58:04,893 INFO L78 Accepts]: Start accepts. Automaton has 192 states and 196 transitions. Word has length 180 [2020-10-12 09:58:04,894 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:58:04,894 INFO L479 AbstractCegarLoop]: Abstraction has 192 states and 196 transitions. [2020-10-12 09:58:04,894 INFO L480 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-10-12 09:58:04,894 INFO L276 IsEmpty]: Start isEmpty. Operand 192 states and 196 transitions. [2020-10-12 09:58:04,895 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 188 [2020-10-12 09:58:04,895 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:58:04,895 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 24, 24, 24, 24, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:58:04,895 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2020-10-12 09:58:04,896 INFO L427 AbstractCegarLoop]: === Iteration 33 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:58:04,896 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:58:04,896 INFO L82 PathProgramCache]: Analyzing trace with hash -1575895906, now seen corresponding path program 24 times [2020-10-12 09:58:04,896 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:58:04,896 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1444189127] [2020-10-12 09:58:04,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:58:04,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:58:04,938 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:58:05,081 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:58:05,151 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:58:10,221 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:58:10,222 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 195 [2020-10-12 09:58:10,222 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-12 09:58:10,222 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5295 [2020-10-12 09:58:10,222 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:58:10,222 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 26 [2020-10-12 09:58:10,222 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 87 [2020-10-12 09:58:10,222 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 50 [2020-10-12 09:58:10,222 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:58:10,655 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:58:10,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:58:10,657 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:58:10,658 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:58:10,658 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:58:10,659 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:58:10,659 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 09:58:10,659 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:58:10,659 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:58:10,659 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:58:10,660 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:58:10,660 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:58:10,676 INFO L134 CoverageAnalysis]: Checked inductivity of 2028 backedges. 0 proven. 576 refuted. 0 times theorem prover too weak. 1452 trivial. 0 not checked. [2020-10-12 09:58:10,676 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1444189127] [2020-10-12 09:58:10,676 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:58:10,676 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2020-10-12 09:58:10,676 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [647708606] [2020-10-12 09:58:10,677 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-10-12 09:58:10,677 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:58:10,677 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-10-12 09:58:10,677 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=353, Invalid=403, Unknown=0, NotChecked=0, Total=756 [2020-10-12 09:58:10,678 INFO L87 Difference]: Start difference. First operand 192 states and 196 transitions. Second operand 28 states. [2020-10-12 09:58:11,240 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:58:11,240 INFO L93 Difference]: Finished difference Result 363 states and 374 transitions. [2020-10-12 09:58:11,241 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-12 09:58:11,241 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 187 [2020-10-12 09:58:11,241 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:58:11,242 INFO L225 Difference]: With dead ends: 363 [2020-10-12 09:58:11,242 INFO L226 Difference]: Without dead ends: 202 [2020-10-12 09:58:11,244 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=353, Invalid=403, Unknown=0, NotChecked=0, Total=756 [2020-10-12 09:58:11,244 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 202 states. [2020-10-12 09:58:11,265 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 202 to 199. [2020-10-12 09:58:11,265 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 199 states. [2020-10-12 09:58:11,266 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 199 states to 199 states and 203 transitions. [2020-10-12 09:58:11,266 INFO L78 Accepts]: Start accepts. Automaton has 199 states and 203 transitions. Word has length 187 [2020-10-12 09:58:11,266 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:58:11,266 INFO L479 AbstractCegarLoop]: Abstraction has 199 states and 203 transitions. [2020-10-12 09:58:11,266 INFO L480 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-10-12 09:58:11,266 INFO L276 IsEmpty]: Start isEmpty. Operand 199 states and 203 transitions. [2020-10-12 09:58:11,267 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 195 [2020-10-12 09:58:11,267 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:58:11,267 INFO L422 BasicCegarLoop]: trace histogram [25, 25, 25, 25, 25, 25, 25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:58:11,268 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2020-10-12 09:58:11,268 INFO L427 AbstractCegarLoop]: === Iteration 34 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:58:11,268 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:58:11,268 INFO L82 PathProgramCache]: Analyzing trace with hash -310685760, now seen corresponding path program 25 times [2020-10-12 09:58:11,268 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:58:11,268 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [40964075] [2020-10-12 09:58:11,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:58:11,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:58:11,292 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:58:11,374 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:58:11,420 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:58:16,351 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:58:16,352 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 202 [2020-10-12 09:58:16,352 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-12 09:58:16,352 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5068 [2020-10-12 09:58:16,352 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:58:16,352 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 27 [2020-10-12 09:58:16,352 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 38 [2020-10-12 09:58:16,352 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 52 [2020-10-12 09:58:16,353 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:58:16,793 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:58:16,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:58:16,795 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:58:16,795 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:58:16,796 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:58:16,796 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:58:16,796 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 09:58:16,796 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:58:16,796 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:58:16,796 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:58:16,796 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:58:16,796 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:58:16,813 INFO L134 CoverageAnalysis]: Checked inductivity of 2200 backedges. 0 proven. 625 refuted. 0 times theorem prover too weak. 1575 trivial. 0 not checked. [2020-10-12 09:58:16,813 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [40964075] [2020-10-12 09:58:16,813 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:58:16,813 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29] total 29 [2020-10-12 09:58:16,813 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [676370786] [2020-10-12 09:58:16,814 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-10-12 09:58:16,814 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:58:16,814 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-10-12 09:58:16,815 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=380, Invalid=432, Unknown=0, NotChecked=0, Total=812 [2020-10-12 09:58:16,815 INFO L87 Difference]: Start difference. First operand 199 states and 203 transitions. Second operand 29 states. [2020-10-12 09:58:17,398 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:58:17,398 INFO L93 Difference]: Finished difference Result 376 states and 387 transitions. [2020-10-12 09:58:17,399 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-12 09:58:17,399 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 194 [2020-10-12 09:58:17,399 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:58:17,400 INFO L225 Difference]: With dead ends: 376 [2020-10-12 09:58:17,400 INFO L226 Difference]: Without dead ends: 209 [2020-10-12 09:58:17,401 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=380, Invalid=432, Unknown=0, NotChecked=0, Total=812 [2020-10-12 09:58:17,402 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 209 states. [2020-10-12 09:58:17,430 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 209 to 206. [2020-10-12 09:58:17,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 206 states. [2020-10-12 09:58:17,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 206 states to 206 states and 210 transitions. [2020-10-12 09:58:17,431 INFO L78 Accepts]: Start accepts. Automaton has 206 states and 210 transitions. Word has length 194 [2020-10-12 09:58:17,432 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:58:17,432 INFO L479 AbstractCegarLoop]: Abstraction has 206 states and 210 transitions. [2020-10-12 09:58:17,432 INFO L480 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-10-12 09:58:17,432 INFO L276 IsEmpty]: Start isEmpty. Operand 206 states and 210 transitions. [2020-10-12 09:58:17,433 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 202 [2020-10-12 09:58:17,433 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:58:17,433 INFO L422 BasicCegarLoop]: trace histogram [26, 26, 26, 26, 26, 26, 26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:58:17,434 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2020-10-12 09:58:17,434 INFO L427 AbstractCegarLoop]: === Iteration 35 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:58:17,434 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:58:17,434 INFO L82 PathProgramCache]: Analyzing trace with hash -1216481774, now seen corresponding path program 26 times [2020-10-12 09:58:17,434 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:58:17,434 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1537203653] [2020-10-12 09:58:17,435 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:58:17,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:58:17,464 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:58:17,568 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:58:17,616 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:58:22,852 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:58:22,852 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 209 [2020-10-12 09:58:22,853 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-12 09:58:22,853 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5398 [2020-10-12 09:58:22,853 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:58:22,853 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 28 [2020-10-12 09:58:22,853 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 93 [2020-10-12 09:58:22,853 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 54 [2020-10-12 09:58:22,853 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:58:23,350 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:58:23,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:58:23,352 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:58:23,353 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:58:23,353 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:58:23,353 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:58:23,353 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 09:58:23,354 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:58:23,354 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:58:23,354 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:58:23,354 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:58:23,354 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:58:23,372 INFO L134 CoverageAnalysis]: Checked inductivity of 2379 backedges. 0 proven. 676 refuted. 0 times theorem prover too weak. 1703 trivial. 0 not checked. [2020-10-12 09:58:23,372 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1537203653] [2020-10-12 09:58:23,372 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:58:23,372 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30] total 30 [2020-10-12 09:58:23,372 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [69204368] [2020-10-12 09:58:23,373 INFO L459 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-10-12 09:58:23,373 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:58:23,373 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-10-12 09:58:23,374 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=408, Invalid=462, Unknown=0, NotChecked=0, Total=870 [2020-10-12 09:58:23,374 INFO L87 Difference]: Start difference. First operand 206 states and 210 transitions. Second operand 30 states. [2020-10-12 09:58:23,884 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:58:23,884 INFO L93 Difference]: Finished difference Result 389 states and 400 transitions. [2020-10-12 09:58:23,885 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-10-12 09:58:23,885 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 201 [2020-10-12 09:58:23,886 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:58:23,887 INFO L225 Difference]: With dead ends: 389 [2020-10-12 09:58:23,887 INFO L226 Difference]: Without dead ends: 216 [2020-10-12 09:58:23,888 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=408, Invalid=462, Unknown=0, NotChecked=0, Total=870 [2020-10-12 09:58:23,889 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 216 states. [2020-10-12 09:58:23,911 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 216 to 213. [2020-10-12 09:58:23,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 213 states. [2020-10-12 09:58:23,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 213 states to 213 states and 217 transitions. [2020-10-12 09:58:23,912 INFO L78 Accepts]: Start accepts. Automaton has 213 states and 217 transitions. Word has length 201 [2020-10-12 09:58:23,912 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:58:23,912 INFO L479 AbstractCegarLoop]: Abstraction has 213 states and 217 transitions. [2020-10-12 09:58:23,912 INFO L480 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-10-12 09:58:23,912 INFO L276 IsEmpty]: Start isEmpty. Operand 213 states and 217 transitions. [2020-10-12 09:58:23,913 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 209 [2020-10-12 09:58:23,914 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:58:23,914 INFO L422 BasicCegarLoop]: trace histogram [27, 27, 27, 27, 27, 27, 27, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:58:23,914 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2020-10-12 09:58:23,914 INFO L427 AbstractCegarLoop]: === Iteration 36 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:58:23,914 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:58:23,915 INFO L82 PathProgramCache]: Analyzing trace with hash -445154252, now seen corresponding path program 27 times [2020-10-12 09:58:23,915 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:58:23,915 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1682697039] [2020-10-12 09:58:23,915 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:58:23,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:58:23,943 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:58:24,038 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:58:24,090 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:58:29,172 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:58:29,172 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 216 [2020-10-12 09:58:29,172 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-12 09:58:29,172 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5237 [2020-10-12 09:58:29,172 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:58:29,173 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 29 [2020-10-12 09:58:29,173 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 40 [2020-10-12 09:58:29,173 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 56 [2020-10-12 09:58:29,173 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:58:29,676 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:58:29,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:58:29,678 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:58:29,679 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:58:29,679 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:58:29,679 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:58:29,679 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 09:58:29,680 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:58:29,680 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:58:29,680 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:58:29,680 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:58:29,680 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:58:29,700 INFO L134 CoverageAnalysis]: Checked inductivity of 2565 backedges. 0 proven. 729 refuted. 0 times theorem prover too weak. 1836 trivial. 0 not checked. [2020-10-12 09:58:29,701 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1682697039] [2020-10-12 09:58:29,701 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:58:29,701 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31] total 31 [2020-10-12 09:58:29,701 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [104837454] [2020-10-12 09:58:29,702 INFO L459 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-10-12 09:58:29,702 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:58:29,702 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-10-12 09:58:29,702 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=437, Invalid=493, Unknown=0, NotChecked=0, Total=930 [2020-10-12 09:58:29,702 INFO L87 Difference]: Start difference. First operand 213 states and 217 transitions. Second operand 31 states. [2020-10-12 09:58:30,324 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:58:30,324 INFO L93 Difference]: Finished difference Result 402 states and 413 transitions. [2020-10-12 09:58:30,328 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-12 09:58:30,329 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 208 [2020-10-12 09:58:30,329 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:58:30,330 INFO L225 Difference]: With dead ends: 402 [2020-10-12 09:58:30,330 INFO L226 Difference]: Without dead ends: 223 [2020-10-12 09:58:30,331 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=437, Invalid=493, Unknown=0, NotChecked=0, Total=930 [2020-10-12 09:58:30,332 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 223 states. [2020-10-12 09:58:30,356 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 223 to 220. [2020-10-12 09:58:30,356 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 220 states. [2020-10-12 09:58:30,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 220 states to 220 states and 224 transitions. [2020-10-12 09:58:30,357 INFO L78 Accepts]: Start accepts. Automaton has 220 states and 224 transitions. Word has length 208 [2020-10-12 09:58:30,357 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:58:30,357 INFO L479 AbstractCegarLoop]: Abstraction has 220 states and 224 transitions. [2020-10-12 09:58:30,357 INFO L480 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-10-12 09:58:30,358 INFO L276 IsEmpty]: Start isEmpty. Operand 220 states and 224 transitions. [2020-10-12 09:58:30,358 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 216 [2020-10-12 09:58:30,358 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:58:30,359 INFO L422 BasicCegarLoop]: trace histogram [28, 28, 28, 28, 28, 28, 28, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:58:30,359 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2020-10-12 09:58:30,359 INFO L427 AbstractCegarLoop]: === Iteration 37 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:58:30,359 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:58:30,359 INFO L82 PathProgramCache]: Analyzing trace with hash 1602609542, now seen corresponding path program 28 times [2020-10-12 09:58:30,359 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:58:30,359 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1600182807] [2020-10-12 09:58:30,359 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:58:30,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:58:30,384 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:58:30,487 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:58:30,541 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:58:35,543 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:58:35,543 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 223 [2020-10-12 09:58:35,543 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-12 09:58:35,543 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5167 [2020-10-12 09:58:35,543 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:58:35,543 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 30 [2020-10-12 09:58:35,543 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 99 [2020-10-12 09:58:35,544 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 58 [2020-10-12 09:58:35,544 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:58:36,104 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:58:36,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:58:36,106 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:58:36,107 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:58:36,107 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:58:36,107 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:58:36,108 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 09:58:36,108 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:58:36,108 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:58:36,108 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:58:36,108 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:58:36,108 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:58:36,129 INFO L134 CoverageAnalysis]: Checked inductivity of 2758 backedges. 0 proven. 784 refuted. 0 times theorem prover too weak. 1974 trivial. 0 not checked. [2020-10-12 09:58:36,129 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1600182807] [2020-10-12 09:58:36,129 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:58:36,129 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32] total 32 [2020-10-12 09:58:36,130 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1959823167] [2020-10-12 09:58:36,130 INFO L459 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-10-12 09:58:36,130 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:58:36,130 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-10-12 09:58:36,131 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=467, Invalid=525, Unknown=0, NotChecked=0, Total=992 [2020-10-12 09:58:36,131 INFO L87 Difference]: Start difference. First operand 220 states and 224 transitions. Second operand 32 states. [2020-10-12 09:58:36,788 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:58:36,789 INFO L93 Difference]: Finished difference Result 415 states and 426 transitions. [2020-10-12 09:58:36,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-10-12 09:58:36,789 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 215 [2020-10-12 09:58:36,790 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:58:36,791 INFO L225 Difference]: With dead ends: 415 [2020-10-12 09:58:36,791 INFO L226 Difference]: Without dead ends: 230 [2020-10-12 09:58:36,793 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=467, Invalid=525, Unknown=0, NotChecked=0, Total=992 [2020-10-12 09:58:36,793 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 230 states. [2020-10-12 09:58:36,823 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 230 to 227. [2020-10-12 09:58:36,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 227 states. [2020-10-12 09:58:36,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 227 states to 227 states and 231 transitions. [2020-10-12 09:58:36,824 INFO L78 Accepts]: Start accepts. Automaton has 227 states and 231 transitions. Word has length 215 [2020-10-12 09:58:36,825 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:58:36,825 INFO L479 AbstractCegarLoop]: Abstraction has 227 states and 231 transitions. [2020-10-12 09:58:36,825 INFO L480 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-10-12 09:58:36,825 INFO L276 IsEmpty]: Start isEmpty. Operand 227 states and 231 transitions. [2020-10-12 09:58:36,826 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 223 [2020-10-12 09:58:36,826 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:58:36,826 INFO L422 BasicCegarLoop]: trace histogram [29, 29, 29, 29, 29, 29, 29, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:58:36,827 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2020-10-12 09:58:36,827 INFO L427 AbstractCegarLoop]: === Iteration 38 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:58:36,827 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:58:36,827 INFO L82 PathProgramCache]: Analyzing trace with hash 1740397224, now seen corresponding path program 29 times [2020-10-12 09:58:36,827 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:58:36,827 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [203445991] [2020-10-12 09:58:36,827 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:58:36,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:58:36,860 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:58:36,970 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:58:37,027 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:58:41,920 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:58:41,921 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 230 [2020-10-12 09:58:41,921 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-12 09:58:41,921 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5072 [2020-10-12 09:58:41,921 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:58:41,921 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 31 [2020-10-12 09:58:41,921 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 42 [2020-10-12 09:58:41,921 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 60 [2020-10-12 09:58:41,921 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:58:42,503 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:58:42,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:58:42,505 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:58:42,506 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:58:42,507 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:58:42,507 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:58:42,507 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 09:58:42,507 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:58:42,508 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:58:42,508 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:58:42,508 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:58:42,508 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:58:42,529 INFO L134 CoverageAnalysis]: Checked inductivity of 2958 backedges. 0 proven. 841 refuted. 0 times theorem prover too weak. 2117 trivial. 0 not checked. [2020-10-12 09:58:42,529 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [203445991] [2020-10-12 09:58:42,529 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:58:42,529 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33] total 33 [2020-10-12 09:58:42,529 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [90349822] [2020-10-12 09:58:42,530 INFO L459 AbstractCegarLoop]: Interpolant automaton has 33 states [2020-10-12 09:58:42,530 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:58:42,530 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2020-10-12 09:58:42,531 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=498, Invalid=558, Unknown=0, NotChecked=0, Total=1056 [2020-10-12 09:58:42,531 INFO L87 Difference]: Start difference. First operand 227 states and 231 transitions. Second operand 33 states. [2020-10-12 09:58:43,205 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:58:43,206 INFO L93 Difference]: Finished difference Result 428 states and 439 transitions. [2020-10-12 09:58:43,206 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-10-12 09:58:43,206 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 222 [2020-10-12 09:58:43,207 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:58:43,208 INFO L225 Difference]: With dead ends: 428 [2020-10-12 09:58:43,208 INFO L226 Difference]: Without dead ends: 237 [2020-10-12 09:58:43,209 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=498, Invalid=558, Unknown=0, NotChecked=0, Total=1056 [2020-10-12 09:58:43,209 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 237 states. [2020-10-12 09:58:43,233 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 237 to 234. [2020-10-12 09:58:43,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 234 states. [2020-10-12 09:58:43,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 234 states to 234 states and 238 transitions. [2020-10-12 09:58:43,234 INFO L78 Accepts]: Start accepts. Automaton has 234 states and 238 transitions. Word has length 222 [2020-10-12 09:58:43,234 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:58:43,234 INFO L479 AbstractCegarLoop]: Abstraction has 234 states and 238 transitions. [2020-10-12 09:58:43,235 INFO L480 AbstractCegarLoop]: Interpolant automaton has 33 states. [2020-10-12 09:58:43,235 INFO L276 IsEmpty]: Start isEmpty. Operand 234 states and 238 transitions. [2020-10-12 09:58:43,235 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 230 [2020-10-12 09:58:43,235 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:58:43,236 INFO L422 BasicCegarLoop]: trace histogram [30, 30, 30, 30, 30, 30, 30, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:58:43,236 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2020-10-12 09:58:43,236 INFO L427 AbstractCegarLoop]: === Iteration 39 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:58:43,236 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:58:43,236 INFO L82 PathProgramCache]: Analyzing trace with hash 1413381882, now seen corresponding path program 30 times [2020-10-12 09:58:43,236 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:58:43,236 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1108434907] [2020-10-12 09:58:43,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:58:43,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:58:43,269 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:58:43,388 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:58:43,446 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:58:48,345 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:58:48,345 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 237 [2020-10-12 09:58:48,345 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-12 09:58:48,346 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5088 [2020-10-12 09:58:48,346 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:58:48,346 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 32 [2020-10-12 09:58:48,346 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 43 [2020-10-12 09:58:48,346 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 62 [2020-10-12 09:58:48,346 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:58:48,988 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:58:48,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:58:48,991 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:58:48,992 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:58:48,992 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:58:48,992 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:58:48,992 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 09:58:48,992 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:58:48,992 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:58:48,992 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:58:48,993 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:58:48,993 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:58:49,015 INFO L134 CoverageAnalysis]: Checked inductivity of 3165 backedges. 0 proven. 900 refuted. 0 times theorem prover too weak. 2265 trivial. 0 not checked. [2020-10-12 09:58:49,015 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1108434907] [2020-10-12 09:58:49,015 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:58:49,015 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34] total 34 [2020-10-12 09:58:49,015 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1990421168] [2020-10-12 09:58:49,016 INFO L459 AbstractCegarLoop]: Interpolant automaton has 34 states [2020-10-12 09:58:49,016 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:58:49,016 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2020-10-12 09:58:49,016 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=530, Invalid=592, Unknown=0, NotChecked=0, Total=1122 [2020-10-12 09:58:49,017 INFO L87 Difference]: Start difference. First operand 234 states and 238 transitions. Second operand 34 states. [2020-10-12 09:58:49,715 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:58:49,715 INFO L93 Difference]: Finished difference Result 441 states and 452 transitions. [2020-10-12 09:58:49,715 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-10-12 09:58:49,716 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 229 [2020-10-12 09:58:49,716 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:58:49,717 INFO L225 Difference]: With dead ends: 441 [2020-10-12 09:58:49,717 INFO L226 Difference]: Without dead ends: 244 [2020-10-12 09:58:49,718 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=530, Invalid=592, Unknown=0, NotChecked=0, Total=1122 [2020-10-12 09:58:49,719 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 244 states. [2020-10-12 09:58:49,753 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 244 to 241. [2020-10-12 09:58:49,754 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 241 states. [2020-10-12 09:58:49,754 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 241 states to 241 states and 245 transitions. [2020-10-12 09:58:49,755 INFO L78 Accepts]: Start accepts. Automaton has 241 states and 245 transitions. Word has length 229 [2020-10-12 09:58:49,755 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:58:49,755 INFO L479 AbstractCegarLoop]: Abstraction has 241 states and 245 transitions. [2020-10-12 09:58:49,755 INFO L480 AbstractCegarLoop]: Interpolant automaton has 34 states. [2020-10-12 09:58:49,755 INFO L276 IsEmpty]: Start isEmpty. Operand 241 states and 245 transitions. [2020-10-12 09:58:49,756 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 237 [2020-10-12 09:58:49,757 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:58:49,757 INFO L422 BasicCegarLoop]: trace histogram [31, 31, 31, 31, 31, 31, 31, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:58:49,757 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2020-10-12 09:58:49,757 INFO L427 AbstractCegarLoop]: === Iteration 40 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:58:49,757 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:58:49,757 INFO L82 PathProgramCache]: Analyzing trace with hash -901846244, now seen corresponding path program 31 times [2020-10-12 09:58:49,758 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:58:49,758 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [582592725] [2020-10-12 09:58:49,758 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:58:49,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:58:49,785 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:58:49,949 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:58:50,045 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:58:55,356 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:58:55,356 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 244 [2020-10-12 09:58:55,357 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-12 09:58:55,357 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5580 [2020-10-12 09:58:55,357 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:58:55,357 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 33 [2020-10-12 09:58:55,357 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 44 [2020-10-12 09:58:55,357 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 64 [2020-10-12 09:58:55,357 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:58:56,009 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:58:56,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:58:56,011 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:58:56,012 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:58:56,012 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:58:56,012 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:58:56,012 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 09:58:56,012 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:58:56,012 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:58:56,012 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:58:56,013 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:58:56,013 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:58:56,035 INFO L134 CoverageAnalysis]: Checked inductivity of 3379 backedges. 0 proven. 961 refuted. 0 times theorem prover too weak. 2418 trivial. 0 not checked. [2020-10-12 09:58:56,035 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [582592725] [2020-10-12 09:58:56,035 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:58:56,036 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35] total 35 [2020-10-12 09:58:56,036 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [635169017] [2020-10-12 09:58:56,036 INFO L459 AbstractCegarLoop]: Interpolant automaton has 35 states [2020-10-12 09:58:56,036 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:58:56,036 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2020-10-12 09:58:56,037 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=563, Invalid=627, Unknown=0, NotChecked=0, Total=1190 [2020-10-12 09:58:56,037 INFO L87 Difference]: Start difference. First operand 241 states and 245 transitions. Second operand 35 states. [2020-10-12 09:58:56,772 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:58:56,772 INFO L93 Difference]: Finished difference Result 454 states and 465 transitions. [2020-10-12 09:58:56,773 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-10-12 09:58:56,773 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 236 [2020-10-12 09:58:56,773 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:58:56,775 INFO L225 Difference]: With dead ends: 454 [2020-10-12 09:58:56,775 INFO L226 Difference]: Without dead ends: 251 [2020-10-12 09:58:56,777 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=563, Invalid=627, Unknown=0, NotChecked=0, Total=1190 [2020-10-12 09:58:56,777 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 251 states. [2020-10-12 09:58:56,814 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 251 to 248. [2020-10-12 09:58:56,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 248 states. [2020-10-12 09:58:56,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 248 states to 248 states and 252 transitions. [2020-10-12 09:58:56,816 INFO L78 Accepts]: Start accepts. Automaton has 248 states and 252 transitions. Word has length 236 [2020-10-12 09:58:56,816 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:58:56,816 INFO L479 AbstractCegarLoop]: Abstraction has 248 states and 252 transitions. [2020-10-12 09:58:56,816 INFO L480 AbstractCegarLoop]: Interpolant automaton has 35 states. [2020-10-12 09:58:56,816 INFO L276 IsEmpty]: Start isEmpty. Operand 248 states and 252 transitions. [2020-10-12 09:58:56,818 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 244 [2020-10-12 09:58:56,818 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:58:56,818 INFO L422 BasicCegarLoop]: trace histogram [32, 32, 32, 32, 32, 32, 32, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:58:56,818 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2020-10-12 09:58:56,818 INFO L427 AbstractCegarLoop]: === Iteration 41 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:58:56,818 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:58:56,819 INFO L82 PathProgramCache]: Analyzing trace with hash 742182510, now seen corresponding path program 32 times [2020-10-12 09:58:56,819 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:58:56,819 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [26643478] [2020-10-12 09:58:56,819 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:58:56,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:58:56,851 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:58:56,987 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:58:57,057 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:59:02,628 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:59:02,628 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 251 [2020-10-12 09:59:02,629 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-12 09:59:02,629 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5787 [2020-10-12 09:59:02,629 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:59:02,629 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 34 [2020-10-12 09:59:02,629 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 09:59:02,629 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 34 [2020-10-12 09:59:02,629 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:59:03,333 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:59:03,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:59:03,335 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:59:03,337 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:59:03,337 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:59:03,337 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:59:03,337 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 09:59:03,337 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:59:03,338 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:59:03,338 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:59:03,338 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:59:03,338 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:59:03,365 INFO L134 CoverageAnalysis]: Checked inductivity of 3600 backedges. 0 proven. 528 refuted. 0 times theorem prover too weak. 3072 trivial. 0 not checked. [2020-10-12 09:59:03,366 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [26643478] [2020-10-12 09:59:03,366 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:59:03,366 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36] total 36 [2020-10-12 09:59:03,366 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [542653939] [2020-10-12 09:59:03,366 INFO L459 AbstractCegarLoop]: Interpolant automaton has 36 states [2020-10-12 09:59:03,366 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:59:03,367 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2020-10-12 09:59:03,367 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=597, Invalid=663, Unknown=0, NotChecked=0, Total=1260 [2020-10-12 09:59:03,368 INFO L87 Difference]: Start difference. First operand 248 states and 252 transitions. Second operand 36 states.