/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=WIDESTAMONGSMALL --traceabstraction.additional.smt.options tolerance=0.4 --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/seq-mthreaded-reduced/pals_opt-floodmax.4.ufo.BOUNDED-8.pals.c.v+cfa-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-adbd35c [2020-10-14 09:36:13,121 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-14 09:36:13,123 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-14 09:36:13,147 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-14 09:36:13,147 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-14 09:36:13,148 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-14 09:36:13,149 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-14 09:36:13,151 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-14 09:36:13,153 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-14 09:36:13,153 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-14 09:36:13,154 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-14 09:36:13,155 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-14 09:36:13,156 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-14 09:36:13,156 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-14 09:36:13,157 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-14 09:36:13,158 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-14 09:36:13,159 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-14 09:36:13,160 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-14 09:36:13,165 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-14 09:36:13,166 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-14 09:36:13,168 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-14 09:36:13,169 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-14 09:36:13,170 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-14 09:36:13,171 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-14 09:36:13,173 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-14 09:36:13,173 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-14 09:36:13,173 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-14 09:36:13,174 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-14 09:36:13,175 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-14 09:36:13,176 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-14 09:36:13,176 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-14 09:36:13,177 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-14 09:36:13,177 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-14 09:36:13,179 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-14 09:36:13,180 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-14 09:36:13,182 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-14 09:36:13,183 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-14 09:36:13,183 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-14 09:36:13,183 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-14 09:36:13,184 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-14 09:36:13,186 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-14 09:36:13,187 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 [2020-10-14 09:36:13,231 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-14 09:36:13,232 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-14 09:36:13,235 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-14 09:36:13,235 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-14 09:36:13,235 INFO L138 SettingsManager]: * Use SBE=true [2020-10-14 09:36:13,236 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-14 09:36:13,236 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-14 09:36:13,236 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-14 09:36:13,236 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-14 09:36:13,236 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-14 09:36:13,236 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-14 09:36:13,237 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-14 09:36:13,237 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-14 09:36:13,240 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-14 09:36:13,240 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-14 09:36:13,240 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-14 09:36:13,241 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-14 09:36:13,241 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-14 09:36:13,241 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-14 09:36:13,241 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-14 09:36:13,241 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-14 09:36:13,242 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-14 09:36:13,242 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-14 09:36:13,243 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-14 09:36:13,243 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-14 09:36:13,243 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-14 09:36:13,243 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-14 09:36:13,244 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-14 09:36:13,244 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-14 09:36:13,244 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=WIDESTAMONGSMALL;tolerance=0.4;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=WIDESTAMONGSMALL;tolerance=0.4;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=WIDESTAMONGSMALL;tolerance=0.4;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=WIDESTAMONGSMALL;tolerance=0.4;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=WIDESTAMONGSMALL;tolerance=0.4;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=WIDESTAMONGSMALL;tolerance=0.4;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=WIDESTAMONGSMALL;tolerance=0.4;log-additional-information=true;unknown-allowed=true; [2020-10-14 09:36:13,576 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-14 09:36:13,595 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-14 09:36:13,598 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-14 09:36:13,600 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-14 09:36:13,600 INFO L275 PluginConnector]: CDTParser initialized [2020-10-14 09:36:13,601 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.4.ufo.BOUNDED-8.pals.c.v+cfa-reducer.c [2020-10-14 09:36:13,654 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/c2887cec7/f049074e40854e14bdaae3535850413f/FLAGbf0e4f142 [2020-10-14 09:36:14,144 INFO L306 CDTParser]: Found 1 translation units. [2020-10-14 09:36:14,145 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.4.ufo.BOUNDED-8.pals.c.v+cfa-reducer.c [2020-10-14 09:36:14,160 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/c2887cec7/f049074e40854e14bdaae3535850413f/FLAGbf0e4f142 [2020-10-14 09:36:14,476 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/c2887cec7/f049074e40854e14bdaae3535850413f [2020-10-14 09:36:14,484 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-14 09:36:14,486 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-14 09:36:14,487 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-14 09:36:14,487 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-14 09:36:14,491 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-14 09:36:14,492 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 09:36:14" (1/1) ... [2020-10-14 09:36:14,495 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5e4afdcf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:36:14, skipping insertion in model container [2020-10-14 09:36:14,495 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 09:36:14" (1/1) ... [2020-10-14 09:36:14,504 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-14 09:36:14,580 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-14 09:36:15,207 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-14 09:36:15,221 INFO L203 MainTranslator]: Completed pre-run [2020-10-14 09:36:15,358 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-14 09:36:15,391 INFO L208 MainTranslator]: Completed translation [2020-10-14 09:36:15,391 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:36:15 WrapperNode [2020-10-14 09:36:15,392 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-14 09:36:15,393 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-14 09:36:15,393 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-14 09:36:15,393 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-14 09:36:15,409 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:36:15" (1/1) ... [2020-10-14 09:36:15,409 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:36:15" (1/1) ... [2020-10-14 09:36:15,429 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:36:15" (1/1) ... [2020-10-14 09:36:15,430 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:36:15" (1/1) ... [2020-10-14 09:36:15,463 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:36:15" (1/1) ... [2020-10-14 09:36:15,493 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:36:15" (1/1) ... [2020-10-14 09:36:15,508 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:36:15" (1/1) ... [2020-10-14 09:36:15,521 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-14 09:36:15,522 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-14 09:36:15,522 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-14 09:36:15,522 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-14 09:36:15,526 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:36:15" (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 [2020-10-14 09:36:15,601 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-14 09:36:15,602 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-14 09:36:15,602 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-10-14 09:36:15,602 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-14 09:36:15,602 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-10-14 09:36:15,603 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-10-14 09:36:15,604 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-10-14 09:36:15,604 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2020-10-14 09:36:15,605 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-14 09:36:15,605 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-10-14 09:36:15,605 INFO L130 BoogieDeclarations]: Found specification of procedure read [2020-10-14 09:36:15,605 INFO L130 BoogieDeclarations]: Found specification of procedure write [2020-10-14 09:36:15,605 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2020-10-14 09:36:15,606 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2020-10-14 09:36:15,606 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2020-10-14 09:36:15,607 INFO L130 BoogieDeclarations]: Found specification of procedure node4 [2020-10-14 09:36:15,607 INFO L130 BoogieDeclarations]: Found specification of procedure init [2020-10-14 09:36:15,608 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-10-14 09:36:15,608 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-14 09:36:15,608 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-14 09:36:15,609 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-14 09:36:17,007 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-14 09:36:17,007 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-10-14 09:36:17,013 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 09:36:17 BoogieIcfgContainer [2020-10-14 09:36:17,014 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-14 09:36:17,015 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-14 09:36:17,015 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-14 09:36:17,019 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-14 09:36:17,019 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.10 09:36:14" (1/3) ... [2020-10-14 09:36:17,020 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@52735a31 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 09:36:17, skipping insertion in model container [2020-10-14 09:36:17,020 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:36:15" (2/3) ... [2020-10-14 09:36:17,021 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@52735a31 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 09:36:17, skipping insertion in model container [2020-10-14 09:36:17,021 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 09:36:17" (3/3) ... [2020-10-14 09:36:17,023 INFO L109 eAbstractionObserver]: Analyzing ICFG pals_opt-floodmax.4.ufo.BOUNDED-8.pals.c.v+cfa-reducer.c [2020-10-14 09:36:17,034 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-14 09:36:17,043 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-14 09:36:17,057 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-14 09:36:17,086 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-10-14 09:36:17,086 INFO L376 AbstractCegarLoop]: Hoare is true [2020-10-14 09:36:17,087 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-14 09:36:17,087 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-14 09:36:17,087 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-14 09:36:17,087 INFO L380 AbstractCegarLoop]: Difference is false [2020-10-14 09:36:17,087 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-14 09:36:17,088 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-14 09:36:17,112 INFO L276 IsEmpty]: Start isEmpty. Operand 347 states. [2020-10-14 09:36:17,129 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2020-10-14 09:36:17,129 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 09:36:17,131 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 09:36:17,131 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 09:36:17,137 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 09:36:17,137 INFO L82 PathProgramCache]: Analyzing trace with hash 1511443852, now seen corresponding path program 1 times [2020-10-14 09:36:17,146 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 09:36:17,147 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [193832004] [2020-10-14 09:36:17,147 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 09:36:17,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:36:17,953 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:36:18,112 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:36:18,834 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:36:19,057 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:36:19,272 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:36:22,816 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:36:22,816 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 128 [2020-10-14 09:36:22,817 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-14 09:36:22,817 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5097 [2020-10-14 09:36:22,821 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:36:22,822 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:36:22,822 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 09:36:22,822 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 73 [2020-10-14 09:36:22,823 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 49 [2020-10-14 09:36:22,823 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 5 [2020-10-14 09:36:23,788 WARN L193 SmtUtils]: Spent 714.00 ms on a formula simplification that was a NOOP. DAG size: 262 [2020-10-14 09:36:23,801 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 09:36:23,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:36:23,823 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:36:23,845 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:36:23,846 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 09:36:23,846 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 09:36:23,847 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 28 [2020-10-14 09:36:23,847 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:36:23,847 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:36:23,848 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 09:36:23,849 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 09:36:23,849 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 09:36:23,850 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-14 09:36:23,927 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 09:36:23,929 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [193832004] [2020-10-14 09:36:23,932 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 09:36:23,932 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-14 09:36:23,933 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2119590636] [2020-10-14 09:36:23,942 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-14 09:36:23,943 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 09:36:23,965 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-14 09:36:23,967 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-14 09:36:23,970 INFO L87 Difference]: Start difference. First operand 347 states. Second operand 4 states. [2020-10-14 09:36:24,678 WARN L193 SmtUtils]: Spent 585.00 ms on a formula simplification that was a NOOP. DAG size: 264 [2020-10-14 09:36:26,696 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 09:36:26,696 INFO L93 Difference]: Finished difference Result 637 states and 1102 transitions. [2020-10-14 09:36:26,697 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-14 09:36:26,698 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 122 [2020-10-14 09:36:26,700 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 09:36:26,717 INFO L225 Difference]: With dead ends: 637 [2020-10-14 09:36:26,717 INFO L226 Difference]: Without dead ends: 479 [2020-10-14 09:36:26,722 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-14 09:36:26,742 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 479 states. [2020-10-14 09:36:26,798 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 479 to 477. [2020-10-14 09:36:26,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 477 states. [2020-10-14 09:36:26,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 477 states to 477 states and 791 transitions. [2020-10-14 09:36:26,804 INFO L78 Accepts]: Start accepts. Automaton has 477 states and 791 transitions. Word has length 122 [2020-10-14 09:36:26,805 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 09:36:26,805 INFO L479 AbstractCegarLoop]: Abstraction has 477 states and 791 transitions. [2020-10-14 09:36:26,805 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-14 09:36:26,805 INFO L276 IsEmpty]: Start isEmpty. Operand 477 states and 791 transitions. [2020-10-14 09:36:26,809 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2020-10-14 09:36:26,809 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 09:36:26,810 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 09:36:26,810 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-14 09:36:26,810 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 09:36:26,810 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 09:36:26,811 INFO L82 PathProgramCache]: Analyzing trace with hash 2121484750, now seen corresponding path program 1 times [2020-10-14 09:36:26,811 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 09:36:26,811 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [551105261] [2020-10-14 09:36:26,811 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 09:36:26,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:36:26,920 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:36:27,004 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:36:27,217 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:36:27,987 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:36:28,296 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:36:28,672 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:36:29,323 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:36:31,988 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:36:31,989 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 131 [2020-10-14 09:36:31,990 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-14 09:36:31,991 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5114 [2020-10-14 09:36:31,992 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:36:31,992 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:36:31,992 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 09:36:31,993 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 72 [2020-10-14 09:36:31,993 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 46 [2020-10-14 09:36:31,993 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 09:36:32,413 WARN L193 SmtUtils]: Spent 327.00 ms on a formula simplification that was a NOOP. DAG size: 262 [2020-10-14 09:36:32,414 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 09:36:32,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:36:32,426 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:36:32,438 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:36:32,439 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 09:36:32,439 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 09:36:32,439 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 15 [2020-10-14 09:36:32,439 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:36:32,440 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:36:32,440 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 09:36:32,440 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 09:36:32,440 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 09:36:32,440 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 09:36:32,480 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 09:36:32,481 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [551105261] [2020-10-14 09:36:32,481 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 09:36:32,482 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-14 09:36:32,482 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1704678019] [2020-10-14 09:36:32,484 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-14 09:36:32,485 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 09:36:32,485 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-14 09:36:32,485 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-14 09:36:32,485 INFO L87 Difference]: Start difference. First operand 477 states and 791 transitions. Second operand 4 states. [2020-10-14 09:36:32,863 WARN L193 SmtUtils]: Spent 338.00 ms on a formula simplification that was a NOOP. DAG size: 264 [2020-10-14 09:36:34,658 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 09:36:34,659 INFO L93 Difference]: Finished difference Result 1017 states and 1703 transitions. [2020-10-14 09:36:34,659 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-14 09:36:34,659 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 125 [2020-10-14 09:36:34,660 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 09:36:34,666 INFO L225 Difference]: With dead ends: 1017 [2020-10-14 09:36:34,666 INFO L226 Difference]: Without dead ends: 737 [2020-10-14 09:36:34,669 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-14 09:36:34,674 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 737 states. [2020-10-14 09:36:34,745 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 737 to 735. [2020-10-14 09:36:34,746 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 735 states. [2020-10-14 09:36:34,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 735 states to 735 states and 1226 transitions. [2020-10-14 09:36:34,750 INFO L78 Accepts]: Start accepts. Automaton has 735 states and 1226 transitions. Word has length 125 [2020-10-14 09:36:34,751 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 09:36:34,751 INFO L479 AbstractCegarLoop]: Abstraction has 735 states and 1226 transitions. [2020-10-14 09:36:34,751 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-14 09:36:34,751 INFO L276 IsEmpty]: Start isEmpty. Operand 735 states and 1226 transitions. [2020-10-14 09:36:34,753 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2020-10-14 09:36:34,754 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 09:36:34,754 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 09:36:34,754 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-14 09:36:34,754 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 09:36:34,755 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 09:36:34,755 INFO L82 PathProgramCache]: Analyzing trace with hash 459684913, now seen corresponding path program 1 times [2020-10-14 09:36:34,755 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 09:36:34,756 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1185722273] [2020-10-14 09:36:34,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 09:36:34,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:36:34,854 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:36:34,942 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:36:35,130 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:36:35,398 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:36:35,617 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:36:37,790 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:36:38,158 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:36:38,356 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:36:38,529 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:36:39,821 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:36:39,821 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 134 [2020-10-14 09:36:39,822 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-14 09:36:39,822 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5011 [2020-10-14 09:36:39,822 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:36:39,822 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:36:39,823 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 09:36:39,823 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 71 [2020-10-14 09:36:39,823 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 43 [2020-10-14 09:36:39,823 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 09:36:40,228 WARN L193 SmtUtils]: Spent 339.00 ms on a formula simplification that was a NOOP. DAG size: 262 [2020-10-14 09:36:40,229 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 09:36:40,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:36:40,241 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:36:40,256 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:36:40,256 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 09:36:40,256 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 09:36:40,256 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 17 [2020-10-14 09:36:40,257 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:36:40,257 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:36:40,257 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 09:36:40,257 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 09:36:40,258 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 09:36:40,258 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 09:36:40,293 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 09:36:40,294 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1185722273] [2020-10-14 09:36:40,294 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 09:36:40,295 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-14 09:36:40,295 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1736099904] [2020-10-14 09:36:40,296 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-14 09:36:40,296 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 09:36:40,296 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-14 09:36:40,296 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-14 09:36:40,297 INFO L87 Difference]: Start difference. First operand 735 states and 1226 transitions. Second operand 4 states. [2020-10-14 09:36:40,806 WARN L193 SmtUtils]: Spent 468.00 ms on a formula simplification that was a NOOP. DAG size: 264 [2020-10-14 09:36:42,530 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 09:36:42,531 INFO L93 Difference]: Finished difference Result 1771 states and 2972 transitions. [2020-10-14 09:36:42,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-14 09:36:42,532 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 128 [2020-10-14 09:36:42,532 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 09:36:42,539 INFO L225 Difference]: With dead ends: 1771 [2020-10-14 09:36:42,539 INFO L226 Difference]: Without dead ends: 1233 [2020-10-14 09:36:42,542 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-14 09:36:42,544 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1233 states. [2020-10-14 09:36:42,585 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1233 to 1231. [2020-10-14 09:36:42,585 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1231 states. [2020-10-14 09:36:42,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1231 states to 1231 states and 2058 transitions. [2020-10-14 09:36:42,592 INFO L78 Accepts]: Start accepts. Automaton has 1231 states and 2058 transitions. Word has length 128 [2020-10-14 09:36:42,593 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 09:36:42,593 INFO L479 AbstractCegarLoop]: Abstraction has 1231 states and 2058 transitions. [2020-10-14 09:36:42,593 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-14 09:36:42,593 INFO L276 IsEmpty]: Start isEmpty. Operand 1231 states and 2058 transitions. [2020-10-14 09:36:42,595 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2020-10-14 09:36:42,596 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 09:36:42,596 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 09:36:42,596 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-14 09:36:42,597 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 09:36:42,597 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 09:36:42,597 INFO L82 PathProgramCache]: Analyzing trace with hash -23517795, now seen corresponding path program 1 times [2020-10-14 09:36:42,597 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 09:36:42,598 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [887361070] [2020-10-14 09:36:42,598 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 09:36:42,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:36:42,694 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:36:42,786 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:36:43,056 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:36:43,286 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:36:43,547 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:36:43,746 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:36:43,994 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:36:47,688 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:36:47,688 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 137 [2020-10-14 09:36:47,689 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-14 09:36:47,689 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5039 [2020-10-14 09:36:47,689 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:36:47,689 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:36:47,689 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 09:36:47,690 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 70 [2020-10-14 09:36:47,690 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 40 [2020-10-14 09:36:47,690 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 09:36:48,194 WARN L193 SmtUtils]: Spent 421.00 ms on a formula simplification that was a NOOP. DAG size: 262 [2020-10-14 09:36:48,195 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 09:36:48,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:36:48,208 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:36:48,224 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:36:48,224 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 09:36:48,225 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 09:36:48,225 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 22 [2020-10-14 09:36:48,225 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:36:48,226 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:36:48,226 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 09:36:48,226 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 09:36:48,227 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 09:36:48,227 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 09:36:48,284 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 09:36:48,285 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [887361070] [2020-10-14 09:36:48,286 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 09:36:48,286 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-14 09:36:48,286 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2094014211] [2020-10-14 09:36:48,287 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-14 09:36:48,287 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 09:36:48,288 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-14 09:36:48,288 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-14 09:36:48,288 INFO L87 Difference]: Start difference. First operand 1231 states and 2058 transitions. Second operand 4 states. [2020-10-14 09:36:48,778 WARN L193 SmtUtils]: Spent 439.00 ms on a formula simplification that was a NOOP. DAG size: 264 [2020-10-14 09:36:50,612 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 09:36:50,613 INFO L93 Difference]: Finished difference Result 3203 states and 5364 transitions. [2020-10-14 09:36:50,613 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-14 09:36:50,613 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 131 [2020-10-14 09:36:50,614 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 09:36:50,625 INFO L225 Difference]: With dead ends: 3203 [2020-10-14 09:36:50,626 INFO L226 Difference]: Without dead ends: 2169 [2020-10-14 09:36:50,629 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-14 09:36:50,631 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2169 states. [2020-10-14 09:36:50,711 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2169 to 2167. [2020-10-14 09:36:50,712 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2167 states. [2020-10-14 09:36:50,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2167 states to 2167 states and 3582 transitions. [2020-10-14 09:36:50,721 INFO L78 Accepts]: Start accepts. Automaton has 2167 states and 3582 transitions. Word has length 131 [2020-10-14 09:36:50,722 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 09:36:50,722 INFO L479 AbstractCegarLoop]: Abstraction has 2167 states and 3582 transitions. [2020-10-14 09:36:50,722 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-14 09:36:50,722 INFO L276 IsEmpty]: Start isEmpty. Operand 2167 states and 3582 transitions. [2020-10-14 09:36:50,725 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2020-10-14 09:36:50,725 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 09:36:50,726 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 09:36:50,726 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-14 09:36:50,726 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 09:36:50,727 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 09:36:50,727 INFO L82 PathProgramCache]: Analyzing trace with hash -237428626, now seen corresponding path program 1 times [2020-10-14 09:36:50,727 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 09:36:50,727 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [199088767] [2020-10-14 09:36:50,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 09:36:50,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:36:50,833 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:36:50,930 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:36:51,042 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:36:51,363 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:36:51,765 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:36:51,956 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:36:52,136 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:36:52,387 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:36:55,804 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:36:55,804 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 140 [2020-10-14 09:36:55,804 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-14 09:36:55,804 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5022 [2020-10-14 09:36:55,804 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:36:55,805 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:36:55,805 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-14 09:36:55,805 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 09:36:55,805 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 114 [2020-10-14 09:36:55,805 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 09:36:56,352 WARN L193 SmtUtils]: Spent 391.00 ms on a formula simplification that was a NOOP. DAG size: 262 [2020-10-14 09:36:56,353 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 09:36:56,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:36:56,363 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:36:56,371 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:36:56,371 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 09:36:56,372 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 09:36:56,372 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-10-14 09:36:56,372 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:36:56,373 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:36:56,373 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 09:36:56,373 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 09:36:56,373 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 09:36:56,373 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 09:36:56,433 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 09:36:56,433 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [199088767] [2020-10-14 09:36:56,434 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 09:36:56,434 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-14 09:36:56,434 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1650492401] [2020-10-14 09:36:56,435 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-14 09:36:56,435 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 09:36:56,435 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-14 09:36:56,435 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-14 09:36:56,435 INFO L87 Difference]: Start difference. First operand 2167 states and 3582 transitions. Second operand 5 states. [2020-10-14 09:36:59,092 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 09:36:59,093 INFO L93 Difference]: Finished difference Result 6317 states and 10434 transitions. [2020-10-14 09:36:59,094 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-14 09:36:59,094 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 134 [2020-10-14 09:36:59,097 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 09:36:59,123 INFO L225 Difference]: With dead ends: 6317 [2020-10-14 09:36:59,123 INFO L226 Difference]: Without dead ends: 4215 [2020-10-14 09:36:59,132 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-14 09:36:59,140 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4215 states. [2020-10-14 09:36:59,470 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4215 to 4213. [2020-10-14 09:36:59,471 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4213 states. [2020-10-14 09:36:59,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4213 states to 4213 states and 6939 transitions. [2020-10-14 09:36:59,494 INFO L78 Accepts]: Start accepts. Automaton has 4213 states and 6939 transitions. Word has length 134 [2020-10-14 09:36:59,495 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 09:36:59,495 INFO L479 AbstractCegarLoop]: Abstraction has 4213 states and 6939 transitions. [2020-10-14 09:36:59,495 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-14 09:36:59,495 INFO L276 IsEmpty]: Start isEmpty. Operand 4213 states and 6939 transitions. [2020-10-14 09:36:59,502 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2020-10-14 09:36:59,502 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 09:36:59,503 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 09:36:59,504 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-14 09:36:59,506 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 09:36:59,507 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 09:36:59,507 INFO L82 PathProgramCache]: Analyzing trace with hash 808681005, now seen corresponding path program 1 times [2020-10-14 09:36:59,507 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 09:36:59,508 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1589453522] [2020-10-14 09:36:59,508 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 09:36:59,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:36:59,607 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:36:59,684 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:36:59,758 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:36:59,928 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:37:00,809 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:37:00,917 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:37:01,040 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:37:01,149 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:37:01,528 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:37:01,604 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:37:04,569 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:37:04,569 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 141 [2020-10-14 09:37:04,570 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 10 [2020-10-14 09:37:04,570 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-10-14 09:37:04,570 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:37:04,570 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:37:04,570 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 09:37:04,570 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 100 [2020-10-14 09:37:04,570 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-10-14 09:37:04,570 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 09:37:04,966 WARN L193 SmtUtils]: Spent 351.00 ms on a formula simplification that was a NOOP. DAG size: 262 [2020-10-14 09:37:04,967 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 09:37:04,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:37:04,975 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:37:04,983 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:37:04,983 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 09:37:04,983 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 09:37:04,983 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-14 09:37:04,983 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:37:04,984 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:37:04,984 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 09:37:04,984 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 09:37:04,984 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 09:37:04,984 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 09:37:05,017 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 09:37:05,017 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1589453522] [2020-10-14 09:37:05,017 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 09:37:05,018 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-14 09:37:05,018 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [23427617] [2020-10-14 09:37:05,018 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-14 09:37:05,019 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 09:37:05,019 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-14 09:37:05,019 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-14 09:37:05,019 INFO L87 Difference]: Start difference. First operand 4213 states and 6939 transitions. Second operand 4 states. [2020-10-14 09:37:05,462 WARN L193 SmtUtils]: Spent 356.00 ms on a formula simplification that was a NOOP. DAG size: 266 [2020-10-14 09:37:07,663 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 09:37:07,664 INFO L93 Difference]: Finished difference Result 7992 states and 13200 transitions. [2020-10-14 09:37:07,664 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-14 09:37:07,664 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 135 [2020-10-14 09:37:07,665 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 09:37:07,696 INFO L225 Difference]: With dead ends: 7992 [2020-10-14 09:37:07,696 INFO L226 Difference]: Without dead ends: 5986 [2020-10-14 09:37:07,703 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-14 09:37:07,712 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5986 states. [2020-10-14 09:37:08,079 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5986 to 5984. [2020-10-14 09:37:08,079 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5984 states. [2020-10-14 09:37:08,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5984 states to 5984 states and 9842 transitions. [2020-10-14 09:37:08,107 INFO L78 Accepts]: Start accepts. Automaton has 5984 states and 9842 transitions. Word has length 135 [2020-10-14 09:37:08,107 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 09:37:08,108 INFO L479 AbstractCegarLoop]: Abstraction has 5984 states and 9842 transitions. [2020-10-14 09:37:08,108 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-14 09:37:08,108 INFO L276 IsEmpty]: Start isEmpty. Operand 5984 states and 9842 transitions. [2020-10-14 09:37:08,111 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2020-10-14 09:37:08,112 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 09:37:08,112 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 09:37:08,112 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-14 09:37:08,113 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 09:37:08,113 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 09:37:08,113 INFO L82 PathProgramCache]: Analyzing trace with hash 1942749314, now seen corresponding path program 1 times [2020-10-14 09:37:08,113 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 09:37:08,115 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1224825346] [2020-10-14 09:37:08,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 09:37:08,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:37:08,205 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:37:08,270 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:37:08,335 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:37:08,475 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:37:09,084 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:37:09,169 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:37:09,254 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:37:09,340 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:37:13,187 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:37:13,188 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 141 [2020-10-14 09:37:13,188 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-14 09:37:13,188 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5022 [2020-10-14 09:37:13,188 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:37:13,188 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:37:13,188 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 09:37:13,188 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 104 [2020-10-14 09:37:13,189 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-14 09:37:13,189 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 09:37:13,580 WARN L193 SmtUtils]: Spent 348.00 ms on a formula simplification that was a NOOP. DAG size: 262 [2020-10-14 09:37:13,581 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 09:37:13,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:37:13,590 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:37:13,600 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:37:13,601 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 09:37:13,601 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 09:37:13,601 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 13 [2020-10-14 09:37:13,601 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:37:13,602 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:37:13,602 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 09:37:13,602 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 09:37:13,602 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 09:37:13,602 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 09:37:13,636 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 09:37:13,637 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1224825346] [2020-10-14 09:37:13,637 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 09:37:13,637 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-14 09:37:13,638 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1268732284] [2020-10-14 09:37:13,638 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-14 09:37:13,638 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 09:37:13,639 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-14 09:37:13,639 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-14 09:37:13,639 INFO L87 Difference]: Start difference. First operand 5984 states and 9842 transitions. Second operand 4 states. [2020-10-14 09:37:15,610 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 09:37:15,610 INFO L93 Difference]: Finished difference Result 13196 states and 21788 transitions. [2020-10-14 09:37:15,611 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-14 09:37:15,611 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 135 [2020-10-14 09:37:15,611 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 09:37:15,647 INFO L225 Difference]: With dead ends: 13196 [2020-10-14 09:37:15,647 INFO L226 Difference]: Without dead ends: 7782 [2020-10-14 09:37:15,658 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-14 09:37:15,667 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7782 states. [2020-10-14 09:37:15,997 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7782 to 7668. [2020-10-14 09:37:15,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7668 states. [2020-10-14 09:37:16,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7668 states to 7668 states and 12566 transitions. [2020-10-14 09:37:16,014 INFO L78 Accepts]: Start accepts. Automaton has 7668 states and 12566 transitions. Word has length 135 [2020-10-14 09:37:16,014 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 09:37:16,014 INFO L479 AbstractCegarLoop]: Abstraction has 7668 states and 12566 transitions. [2020-10-14 09:37:16,014 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-14 09:37:16,015 INFO L276 IsEmpty]: Start isEmpty. Operand 7668 states and 12566 transitions. [2020-10-14 09:37:16,019 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2020-10-14 09:37:16,019 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 09:37:16,019 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 09:37:16,020 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-14 09:37:16,020 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 09:37:16,020 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 09:37:16,020 INFO L82 PathProgramCache]: Analyzing trace with hash 199520437, now seen corresponding path program 1 times [2020-10-14 09:37:16,021 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 09:37:16,021 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1955619494] [2020-10-14 09:37:16,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 09:37:16,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:37:16,101 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:37:16,160 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:37:16,256 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:37:16,376 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:37:16,692 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:37:16,864 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:37:17,046 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:37:17,197 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:37:17,261 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:37:21,086 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:37:21,086 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 142 [2020-10-14 09:37:21,086 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-14 09:37:21,086 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5019 [2020-10-14 09:37:21,086 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:37:21,087 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:37:21,087 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 09:37:21,087 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 26 [2020-10-14 09:37:21,087 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 94 [2020-10-14 09:37:21,087 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 09:37:21,471 WARN L193 SmtUtils]: Spent 334.00 ms on a formula simplification that was a NOOP. DAG size: 262 [2020-10-14 09:37:21,472 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 09:37:21,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:37:21,482 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:37:21,493 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:37:21,494 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 09:37:21,494 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 09:37:21,494 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 14 [2020-10-14 09:37:21,494 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:37:21,495 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:37:21,495 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 09:37:21,495 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 09:37:21,495 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 09:37:21,495 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 09:37:21,539 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 09:37:21,540 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1955619494] [2020-10-14 09:37:21,540 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 09:37:21,540 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-14 09:37:21,540 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [24371320] [2020-10-14 09:37:21,541 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-14 09:37:21,541 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 09:37:21,542 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-14 09:37:21,542 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-14 09:37:21,542 INFO L87 Difference]: Start difference. First operand 7668 states and 12566 transitions. Second operand 4 states. [2020-10-14 09:37:25,126 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 09:37:25,127 INFO L93 Difference]: Finished difference Result 22470 states and 36802 transitions. [2020-10-14 09:37:25,127 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-14 09:37:25,128 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 136 [2020-10-14 09:37:25,128 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 09:37:25,183 INFO L225 Difference]: With dead ends: 22470 [2020-10-14 09:37:25,183 INFO L226 Difference]: Without dead ends: 14897 [2020-10-14 09:37:25,219 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-14 09:37:25,240 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14897 states. [2020-10-14 09:37:25,738 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14897 to 14895. [2020-10-14 09:37:25,738 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14895 states. [2020-10-14 09:37:25,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14895 states to 14895 states and 24296 transitions. [2020-10-14 09:37:25,760 INFO L78 Accepts]: Start accepts. Automaton has 14895 states and 24296 transitions. Word has length 136 [2020-10-14 09:37:25,760 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 09:37:25,760 INFO L479 AbstractCegarLoop]: Abstraction has 14895 states and 24296 transitions. [2020-10-14 09:37:25,760 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-14 09:37:25,760 INFO L276 IsEmpty]: Start isEmpty. Operand 14895 states and 24296 transitions. [2020-10-14 09:37:25,765 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2020-10-14 09:37:25,766 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 09:37:25,766 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 09:37:25,766 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-14 09:37:25,766 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 09:37:25,766 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 09:37:25,767 INFO L82 PathProgramCache]: Analyzing trace with hash 839345786, now seen corresponding path program 1 times [2020-10-14 09:37:25,767 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 09:37:25,767 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [521126986] [2020-10-14 09:37:25,767 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 09:37:25,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:37:25,812 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:37:25,840 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:37:25,873 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:37:25,968 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:37:26,009 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:37:26,286 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:37:27,199 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:37:27,306 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:37:27,405 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:37:27,503 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:37:30,813 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:37:30,813 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 142 [2020-10-14 09:37:30,813 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 10 [2020-10-14 09:37:30,813 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5018 [2020-10-14 09:37:30,813 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:37:30,813 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:37:30,814 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 09:37:30,814 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 26 [2020-10-14 09:37:30,814 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 5 [2020-10-14 09:37:30,814 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 09:37:31,181 WARN L193 SmtUtils]: Spent 336.00 ms on a formula simplification that was a NOOP. DAG size: 262 [2020-10-14 09:37:31,183 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 09:37:31,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:37:31,190 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:37:31,199 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:37:31,199 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 09:37:31,200 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 09:37:31,200 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-14 09:37:31,271 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:37:31,272 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:37:31,272 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 09:37:31,272 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 09:37:31,272 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 09:37:31,272 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 09:37:31,291 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 09:37:31,292 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [521126986] [2020-10-14 09:37:31,292 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 09:37:31,292 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-14 09:37:31,292 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [758175619] [2020-10-14 09:37:31,293 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-14 09:37:31,293 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 09:37:31,293 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-14 09:37:31,293 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-14 09:37:31,293 INFO L87 Difference]: Start difference. First operand 14895 states and 24296 transitions. Second operand 4 states. [2020-10-14 09:37:35,068 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 09:37:35,069 INFO L93 Difference]: Finished difference Result 44497 states and 72550 transitions. [2020-10-14 09:37:35,069 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-14 09:37:35,069 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 136 [2020-10-14 09:37:35,069 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 09:37:35,134 INFO L225 Difference]: With dead ends: 44497 [2020-10-14 09:37:35,134 INFO L226 Difference]: Without dead ends: 29698 [2020-10-14 09:37:35,172 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-14 09:37:35,209 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29698 states. [2020-10-14 09:37:36,624 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29698 to 14912. [2020-10-14 09:37:36,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14912 states. [2020-10-14 09:37:36,643 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14912 states to 14912 states and 24318 transitions. [2020-10-14 09:37:36,644 INFO L78 Accepts]: Start accepts. Automaton has 14912 states and 24318 transitions. Word has length 136 [2020-10-14 09:37:36,644 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 09:37:36,644 INFO L479 AbstractCegarLoop]: Abstraction has 14912 states and 24318 transitions. [2020-10-14 09:37:36,644 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-14 09:37:36,644 INFO L276 IsEmpty]: Start isEmpty. Operand 14912 states and 24318 transitions. [2020-10-14 09:37:36,649 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2020-10-14 09:37:36,649 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 09:37:36,650 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 09:37:36,650 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-14 09:37:36,650 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 09:37:36,650 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 09:37:36,650 INFO L82 PathProgramCache]: Analyzing trace with hash -374218904, now seen corresponding path program 1 times [2020-10-14 09:37:36,651 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 09:37:36,651 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1143222146] [2020-10-14 09:37:36,651 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 09:37:36,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:37:36,730 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:37:36,770 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:37:36,814 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:37:36,932 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:37:37,186 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:37:37,298 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:37:37,406 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:37:37,452 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:37:41,704 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:37:41,704 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 143 [2020-10-14 09:37:41,704 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-14 09:37:41,704 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5008 [2020-10-14 09:37:41,705 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:37:41,705 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:37:41,705 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 09:37:41,705 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 105 [2020-10-14 09:37:41,705 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-14 09:37:41,705 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 09:37:42,074 WARN L193 SmtUtils]: Spent 331.00 ms on a formula simplification that was a NOOP. DAG size: 262 [2020-10-14 09:37:42,075 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 09:37:42,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:37:42,084 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:37:42,091 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:37:42,091 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 09:37:42,091 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 09:37:42,091 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-14 09:37:42,091 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:37:42,092 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:37:42,092 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 09:37:42,092 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 09:37:42,092 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 09:37:42,092 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 09:37:42,111 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 09:37:42,112 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1143222146] [2020-10-14 09:37:42,112 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 09:37:42,112 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-14 09:37:42,113 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1729643185] [2020-10-14 09:37:42,113 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-14 09:37:42,113 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 09:37:42,113 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-14 09:37:42,114 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-14 09:37:42,114 INFO L87 Difference]: Start difference. First operand 14912 states and 24318 transitions. Second operand 4 states. [2020-10-14 09:37:44,697 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 09:37:44,698 INFO L93 Difference]: Finished difference Result 35260 states and 57752 transitions. [2020-10-14 09:37:44,698 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-14 09:37:44,698 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 137 [2020-10-14 09:37:44,699 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 09:37:44,733 INFO L225 Difference]: With dead ends: 35260 [2020-10-14 09:37:44,733 INFO L226 Difference]: Without dead ends: 21322 [2020-10-14 09:37:44,767 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-14 09:37:44,789 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21322 states. [2020-10-14 09:37:45,637 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21322 to 20872. [2020-10-14 09:37:45,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20872 states. [2020-10-14 09:37:45,671 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20872 states to 20872 states and 33794 transitions. [2020-10-14 09:37:45,671 INFO L78 Accepts]: Start accepts. Automaton has 20872 states and 33794 transitions. Word has length 137 [2020-10-14 09:37:45,672 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 09:37:45,672 INFO L479 AbstractCegarLoop]: Abstraction has 20872 states and 33794 transitions. [2020-10-14 09:37:45,672 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-14 09:37:45,672 INFO L276 IsEmpty]: Start isEmpty. Operand 20872 states and 33794 transitions. [2020-10-14 09:37:45,677 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2020-10-14 09:37:45,677 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 09:37:45,677 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 09:37:45,678 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-14 09:37:45,678 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 09:37:45,678 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 09:37:45,678 INFO L82 PathProgramCache]: Analyzing trace with hash 1900368943, now seen corresponding path program 1 times [2020-10-14 09:37:45,678 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 09:37:45,679 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [310928309] [2020-10-14 09:37:45,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 09:37:45,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:37:45,752 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:37:45,793 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:37:45,835 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:37:45,952 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:37:46,199 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:37:46,243 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:37:46,399 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:37:46,498 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:37:46,738 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:37:46,887 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:37:50,738 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:37:50,738 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 143 [2020-10-14 09:37:50,738 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 10 [2020-10-14 09:37:50,739 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5016 [2020-10-14 09:37:50,739 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:37:50,739 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:37:50,739 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 09:37:50,739 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 101 [2020-10-14 09:37:50,739 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-10-14 09:37:50,739 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 09:37:51,142 WARN L193 SmtUtils]: Spent 354.00 ms on a formula simplification that was a NOOP. DAG size: 262 [2020-10-14 09:37:51,144 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 09:37:51,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:37:51,151 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:37:51,161 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:37:51,161 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 09:37:51,161 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 09:37:51,161 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-10-14 09:37:51,162 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:37:51,162 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:37:51,162 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 09:37:51,162 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 09:37:51,162 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 09:37:51,162 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 09:37:51,180 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 09:37:51,181 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [310928309] [2020-10-14 09:37:51,181 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 09:37:51,181 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-14 09:37:51,181 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [266825504] [2020-10-14 09:37:51,182 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-14 09:37:51,182 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 09:37:51,182 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-14 09:37:51,182 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-14 09:37:51,183 INFO L87 Difference]: Start difference. First operand 20872 states and 33794 transitions. Second operand 4 states. [2020-10-14 09:37:51,583 WARN L193 SmtUtils]: Spent 369.00 ms on a formula simplification that was a NOOP. DAG size: 266 [2020-10-14 09:37:54,635 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 09:37:54,636 INFO L93 Difference]: Finished difference Result 39556 states and 64332 transitions. [2020-10-14 09:37:54,636 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-14 09:37:54,636 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 137 [2020-10-14 09:37:54,637 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 09:37:54,681 INFO L225 Difference]: With dead ends: 39556 [2020-10-14 09:37:54,681 INFO L226 Difference]: Without dead ends: 26258 [2020-10-14 09:37:54,714 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-14 09:37:54,744 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26258 states. [2020-10-14 09:37:55,838 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26258 to 26256. [2020-10-14 09:37:55,838 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26256 states. [2020-10-14 09:37:55,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26256 states to 26256 states and 42514 transitions. [2020-10-14 09:37:55,879 INFO L78 Accepts]: Start accepts. Automaton has 26256 states and 42514 transitions. Word has length 137 [2020-10-14 09:37:55,879 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 09:37:55,879 INFO L479 AbstractCegarLoop]: Abstraction has 26256 states and 42514 transitions. [2020-10-14 09:37:55,879 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-14 09:37:55,879 INFO L276 IsEmpty]: Start isEmpty. Operand 26256 states and 42514 transitions. [2020-10-14 09:37:55,883 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2020-10-14 09:37:55,883 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 09:37:55,883 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 09:37:55,883 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-14 09:37:55,883 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 09:37:55,884 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 09:37:55,884 INFO L82 PathProgramCache]: Analyzing trace with hash 2100542799, now seen corresponding path program 1 times [2020-10-14 09:37:55,884 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 09:37:55,884 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1407716529] [2020-10-14 09:37:55,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 09:37:55,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:37:55,930 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:37:55,970 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:37:56,014 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:37:56,116 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:37:56,217 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:37:56,316 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:37:57,547 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:37:57,651 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:37:57,756 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:37:57,857 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:38:00,923 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:38:00,923 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 143 [2020-10-14 09:38:00,923 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 10 [2020-10-14 09:38:00,923 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5010 [2020-10-14 09:38:00,924 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:38:00,924 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:38:00,924 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 09:38:00,924 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 25 [2020-10-14 09:38:00,924 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 5 [2020-10-14 09:38:00,925 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 09:38:01,457 WARN L193 SmtUtils]: Spent 500.00 ms on a formula simplification that was a NOOP. DAG size: 262 [2020-10-14 09:38:01,458 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 09:38:01,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:38:01,469 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:38:01,476 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:38:01,477 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 09:38:01,477 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 09:38:01,477 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-14 09:38:01,477 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:38:01,478 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:38:01,478 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 09:38:01,478 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 09:38:01,478 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 09:38:01,478 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 09:38:01,505 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 09:38:01,505 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1407716529] [2020-10-14 09:38:01,505 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 09:38:01,506 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-14 09:38:01,506 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1599966558] [2020-10-14 09:38:01,506 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-14 09:38:01,507 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 09:38:01,507 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-14 09:38:01,512 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-14 09:38:01,512 INFO L87 Difference]: Start difference. First operand 26256 states and 42514 transitions. Second operand 4 states. [2020-10-14 09:38:06,295 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 09:38:06,295 INFO L93 Difference]: Finished difference Result 78567 states and 127192 transitions. [2020-10-14 09:38:06,296 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-14 09:38:06,296 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 137 [2020-10-14 09:38:06,296 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 09:38:06,385 INFO L225 Difference]: With dead ends: 78567 [2020-10-14 09:38:06,385 INFO L226 Difference]: Without dead ends: 52420 [2020-10-14 09:38:06,449 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-14 09:38:06,508 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52420 states. [2020-10-14 09:38:07,926 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52420 to 26290. [2020-10-14 09:38:07,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26290 states. [2020-10-14 09:38:07,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26290 states to 26290 states and 42562 transitions. [2020-10-14 09:38:07,963 INFO L78 Accepts]: Start accepts. Automaton has 26290 states and 42562 transitions. Word has length 137 [2020-10-14 09:38:07,963 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 09:38:07,963 INFO L479 AbstractCegarLoop]: Abstraction has 26290 states and 42562 transitions. [2020-10-14 09:38:07,963 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-14 09:38:07,963 INFO L276 IsEmpty]: Start isEmpty. Operand 26290 states and 42562 transitions. [2020-10-14 09:38:07,966 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2020-10-14 09:38:07,966 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 09:38:07,966 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 09:38:07,966 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-14 09:38:07,966 INFO L427 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 09:38:07,967 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 09:38:07,967 INFO L82 PathProgramCache]: Analyzing trace with hash -1342375219, now seen corresponding path program 1 times [2020-10-14 09:38:07,967 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 09:38:07,967 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1885772660] [2020-10-14 09:38:07,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 09:38:08,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:38:08,029 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:38:08,089 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:38:08,141 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:38:08,293 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:38:08,544 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:38:08,640 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:38:08,729 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:38:08,871 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:38:13,013 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:38:13,013 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 144 [2020-10-14 09:38:13,014 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-14 09:38:13,014 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5006 [2020-10-14 09:38:13,014 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:38:13,014 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:38:13,014 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-14 09:38:13,014 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-14 09:38:13,014 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 122 [2020-10-14 09:38:13,014 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 09:38:13,420 WARN L193 SmtUtils]: Spent 333.00 ms on a formula simplification that was a NOOP. DAG size: 262 [2020-10-14 09:38:13,422 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 09:38:13,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:38:13,436 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:38:13,459 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:38:13,460 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 09:38:13,460 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 09:38:13,460 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 27 [2020-10-14 09:38:13,460 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:38:13,460 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:38:13,461 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 09:38:13,461 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 09:38:13,461 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-14 09:38:13,461 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 09:38:13,489 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 09:38:13,489 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1885772660] [2020-10-14 09:38:13,489 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 09:38:13,490 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-14 09:38:13,490 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1411643780] [2020-10-14 09:38:13,490 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-14 09:38:13,490 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 09:38:13,491 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-14 09:38:13,491 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-14 09:38:13,491 INFO L87 Difference]: Start difference. First operand 26290 states and 42562 transitions. Second operand 6 states. [2020-10-14 09:38:13,890 WARN L193 SmtUtils]: Spent 350.00 ms on a formula simplification that was a NOOP. DAG size: 270 [2020-10-14 09:38:17,629 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 09:38:17,629 INFO L93 Difference]: Finished difference Result 70094 states and 113740 transitions. [2020-10-14 09:38:17,630 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-14 09:38:17,630 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 138 [2020-10-14 09:38:17,630 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 09:38:17,700 INFO L225 Difference]: With dead ends: 70094 [2020-10-14 09:38:17,700 INFO L226 Difference]: Without dead ends: 44812 [2020-10-14 09:38:17,741 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2020-10-14 09:38:17,785 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44812 states. [2020-10-14 09:38:20,013 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44812 to 44810. [2020-10-14 09:38:20,013 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44810 states. [2020-10-14 09:38:20,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44810 states to 44810 states and 72394 transitions. [2020-10-14 09:38:20,080 INFO L78 Accepts]: Start accepts. Automaton has 44810 states and 72394 transitions. Word has length 138 [2020-10-14 09:38:20,080 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 09:38:20,081 INFO L479 AbstractCegarLoop]: Abstraction has 44810 states and 72394 transitions. [2020-10-14 09:38:20,081 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-14 09:38:20,081 INFO L276 IsEmpty]: Start isEmpty. Operand 44810 states and 72394 transitions. [2020-10-14 09:38:20,083 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2020-10-14 09:38:20,083 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 09:38:20,083 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 09:38:20,083 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-14 09:38:20,083 INFO L427 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 09:38:20,083 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 09:38:20,084 INFO L82 PathProgramCache]: Analyzing trace with hash 161089778, now seen corresponding path program 1 times [2020-10-14 09:38:20,084 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 09:38:20,084 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [104621629] [2020-10-14 09:38:20,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 09:38:20,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:38:20,173 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:38:20,252 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:38:20,332 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:38:20,502 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:38:20,556 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:38:20,937 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:38:21,044 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:38:25,139 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:38:25,139 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 144 [2020-10-14 09:38:25,139 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-14 09:38:25,140 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-14 09:38:25,140 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:38:25,140 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:38:25,140 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-14 09:38:25,140 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 09:38:25,140 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 109 [2020-10-14 09:38:25,140 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 09:38:25,599 WARN L193 SmtUtils]: Spent 328.00 ms on a formula simplification that was a NOOP. DAG size: 262 [2020-10-14 09:38:25,600 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 09:38:25,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:38:25,609 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:38:25,615 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:38:25,615 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 09:38:25,615 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 09:38:25,615 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-14 09:38:25,615 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:38:25,615 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:38:25,615 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 09:38:25,616 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 09:38:25,616 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 09:38:25,616 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 09:38:25,651 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 09:38:25,651 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [104621629] [2020-10-14 09:38:25,651 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 09:38:25,651 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-14 09:38:25,651 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1643609653] [2020-10-14 09:38:25,652 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-14 09:38:25,652 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 09:38:25,652 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-14 09:38:25,652 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-14 09:38:25,652 INFO L87 Difference]: Start difference. First operand 44810 states and 72394 transitions. Second operand 5 states. [2020-10-14 09:38:32,586 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 09:38:32,587 INFO L93 Difference]: Finished difference Result 132748 states and 214577 transitions. [2020-10-14 09:38:32,587 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-14 09:38:32,587 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 138 [2020-10-14 09:38:32,588 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 09:38:32,712 INFO L225 Difference]: With dead ends: 132748 [2020-10-14 09:38:32,712 INFO L226 Difference]: Without dead ends: 88098 [2020-10-14 09:38:32,760 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-14 09:38:32,825 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88098 states. [2020-10-14 09:38:37,979 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88098 to 88096. [2020-10-14 09:38:37,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88096 states. [2020-10-14 09:38:38,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88096 states to 88096 states and 141867 transitions. [2020-10-14 09:38:38,103 INFO L78 Accepts]: Start accepts. Automaton has 88096 states and 141867 transitions. Word has length 138 [2020-10-14 09:38:38,103 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 09:38:38,103 INFO L479 AbstractCegarLoop]: Abstraction has 88096 states and 141867 transitions. [2020-10-14 09:38:38,103 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-14 09:38:38,103 INFO L276 IsEmpty]: Start isEmpty. Operand 88096 states and 141867 transitions. [2020-10-14 09:38:38,107 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2020-10-14 09:38:38,107 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 09:38:38,107 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 09:38:38,107 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-14 09:38:38,108 INFO L427 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 09:38:38,108 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 09:38:38,108 INFO L82 PathProgramCache]: Analyzing trace with hash -639284740, now seen corresponding path program 1 times [2020-10-14 09:38:38,108 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 09:38:38,108 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1889316671] [2020-10-14 09:38:38,108 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 09:38:38,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:38:38,221 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:38:38,310 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:38:38,408 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:38:38,604 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:38:39,123 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:38:39,166 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:38:39,425 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:38:39,512 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:38:43,183 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:38:43,183 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 146 [2020-10-14 09:38:43,183 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-14 09:38:43,183 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5016 [2020-10-14 09:38:43,183 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:38:43,183 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:38:43,183 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 09:38:43,184 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 24 [2020-10-14 09:38:43,184 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 91 [2020-10-14 09:38:43,184 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 09:38:43,560 WARN L193 SmtUtils]: Spent 334.00 ms on a formula simplification that was a NOOP. DAG size: 262 [2020-10-14 09:38:43,561 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 09:38:43,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:38:43,568 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:38:43,576 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:38:43,577 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 09:38:43,577 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 09:38:43,577 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-14 09:38:43,577 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:38:43,577 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:38:43,577 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 09:38:43,577 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 09:38:43,577 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 09:38:43,578 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 09:38:43,607 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 09:38:43,607 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1889316671] [2020-10-14 09:38:43,607 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 09:38:43,608 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-14 09:38:43,608 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2009743760] [2020-10-14 09:38:43,608 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-14 09:38:43,608 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 09:38:43,609 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-14 09:38:43,609 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-14 09:38:43,609 INFO L87 Difference]: Start difference. First operand 88096 states and 141867 transitions. Second operand 4 states. [2020-10-14 09:38:55,681 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 09:38:55,681 INFO L93 Difference]: Finished difference Result 258750 states and 416491 transitions. [2020-10-14 09:38:55,682 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-14 09:38:55,682 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 140 [2020-10-14 09:38:55,682 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 09:38:55,939 INFO L225 Difference]: With dead ends: 258750 [2020-10-14 09:38:55,940 INFO L226 Difference]: Without dead ends: 171144 [2020-10-14 09:38:56,013 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-14 09:38:56,137 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171144 states. [2020-10-14 09:39:09,797 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171144 to 171138. [2020-10-14 09:39:09,797 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 171138 states. [2020-10-14 09:39:10,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171138 states to 171138 states and 274083 transitions. [2020-10-14 09:39:10,088 INFO L78 Accepts]: Start accepts. Automaton has 171138 states and 274083 transitions. Word has length 140 [2020-10-14 09:39:10,088 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 09:39:10,088 INFO L479 AbstractCegarLoop]: Abstraction has 171138 states and 274083 transitions. [2020-10-14 09:39:10,088 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-14 09:39:10,088 INFO L276 IsEmpty]: Start isEmpty. Operand 171138 states and 274083 transitions. [2020-10-14 09:39:10,095 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2020-10-14 09:39:10,095 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 09:39:10,095 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 09:39:10,096 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-14 09:39:10,096 INFO L427 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 09:39:10,096 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 09:39:10,096 INFO L82 PathProgramCache]: Analyzing trace with hash 1785206785, now seen corresponding path program 1 times [2020-10-14 09:39:10,097 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 09:39:10,097 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [141733711] [2020-10-14 09:39:10,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 09:39:10,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:39:10,134 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:39:10,158 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:39:10,191 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:39:10,231 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:39:10,499 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:39:10,596 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:39:12,111 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:39:12,235 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:39:12,496 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:39:15,135 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:39:15,135 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 146 [2020-10-14 09:39:15,135 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-14 09:39:15,136 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5015 [2020-10-14 09:39:15,136 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:39:15,136 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:39:15,136 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 09:39:15,136 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 18 [2020-10-14 09:39:15,136 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-14 09:39:15,136 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 09:39:15,530 WARN L193 SmtUtils]: Spent 359.00 ms on a formula simplification that was a NOOP. DAG size: 262 [2020-10-14 09:39:15,531 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 09:39:15,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:39:15,538 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:39:15,546 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:39:15,546 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 09:39:15,546 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 09:39:15,546 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-14 09:39:15,546 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:39:15,547 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:39:15,547 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 09:39:15,547 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 09:39:15,547 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 09:39:15,547 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 09:39:15,565 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 09:39:15,566 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [141733711] [2020-10-14 09:39:15,566 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 09:39:15,566 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-14 09:39:15,566 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1888149262] [2020-10-14 09:39:15,567 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-14 09:39:15,567 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 09:39:15,567 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-14 09:39:15,567 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-14 09:39:15,567 INFO L87 Difference]: Start difference. First operand 171138 states and 274083 transitions. Second operand 4 states. [2020-10-14 09:39:40,643 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 09:39:40,643 INFO L93 Difference]: Finished difference Result 512829 states and 821264 transitions. [2020-10-14 09:39:40,643 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-14 09:39:40,644 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 140 [2020-10-14 09:39:40,644 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 09:39:41,164 INFO L225 Difference]: With dead ends: 512829 [2020-10-14 09:39:41,164 INFO L226 Difference]: Without dead ends: 341802 [2020-10-14 09:39:41,301 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-14 09:39:41,550 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 341802 states.