/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --rcfgbuilder.size.of.a.code.block SequenceOfStatements --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=NARROWEST --traceabstraction.additional.smt.options log-additional-information=true --traceabstraction.additional.smt.options unknown-allowed=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_floodmax.3.3.ufo.BOUNDED-6.pals.c.v+nlh-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-adbd35c [2020-10-13 13:51:14,108 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-13 13:51:14,110 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-13 13:51:14,158 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-13 13:51:14,158 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-13 13:51:14,170 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-13 13:51:14,171 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-13 13:51:14,174 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-13 13:51:14,176 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-13 13:51:14,177 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-13 13:51:14,179 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-13 13:51:14,181 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-13 13:51:14,182 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-13 13:51:14,183 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-13 13:51:14,186 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-13 13:51:14,187 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-13 13:51:14,190 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-13 13:51:14,191 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-13 13:51:14,193 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-13 13:51:14,198 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-13 13:51:14,203 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-13 13:51:14,204 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-13 13:51:14,205 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-13 13:51:14,206 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-13 13:51:14,209 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-13 13:51:14,209 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-13 13:51:14,209 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-13 13:51:14,210 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-13 13:51:14,211 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-13 13:51:14,211 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-13 13:51:14,212 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-13 13:51:14,212 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-13 13:51:14,213 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-13 13:51:14,213 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-13 13:51:14,214 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-13 13:51:14,214 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-13 13:51:14,215 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-13 13:51:14,215 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-13 13:51:14,215 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-13 13:51:14,216 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-13 13:51:14,217 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-13 13:51:14,217 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-13 13:51:14,241 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-13 13:51:14,241 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-13 13:51:14,242 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-13 13:51:14,242 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-13 13:51:14,243 INFO L138 SettingsManager]: * Use SBE=true [2020-10-13 13:51:14,243 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-13 13:51:14,243 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-13 13:51:14,243 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-13 13:51:14,243 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-13 13:51:14,244 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-13 13:51:14,244 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-13 13:51:14,244 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-13 13:51:14,244 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-13 13:51:14,244 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-13 13:51:14,245 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-13 13:51:14,245 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-13 13:51:14,245 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-13 13:51:14,245 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-13 13:51:14,245 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-13 13:51:14,246 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-13 13:51:14,246 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-13 13:51:14,246 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-13 13:51:14,246 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-13 13:51:14,246 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-13 13:51:14,247 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-13 13:51:14,247 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-13 13:51:14,247 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-13 13:51:14,247 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-13 13:51:14,247 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-13 13:51:14,248 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=NARROWEST;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=NARROWEST;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=NARROWEST;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=NARROWEST;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=NARROWEST;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=NARROWEST;log-additional-information=true;unknown-allowed=true; [2020-10-13 13:51:14,552 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-13 13:51:14,564 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-13 13:51:14,567 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-13 13:51:14,569 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-13 13:51:14,569 INFO L275 PluginConnector]: CDTParser initialized [2020-10-13 13:51:14,570 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_floodmax.3.3.ufo.BOUNDED-6.pals.c.v+nlh-reducer.c [2020-10-13 13:51:14,634 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/fb9b066a5/28bbebeeb6bc41b08c7a01c3ca3f3041/FLAG4fdb52ff3 [2020-10-13 13:51:15,166 INFO L306 CDTParser]: Found 1 translation units. [2020-10-13 13:51:15,167 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/seq-mthreaded-reduced/pals_floodmax.3.3.ufo.BOUNDED-6.pals.c.v+nlh-reducer.c [2020-10-13 13:51:15,184 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/fb9b066a5/28bbebeeb6bc41b08c7a01c3ca3f3041/FLAG4fdb52ff3 [2020-10-13 13:51:15,530 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/fb9b066a5/28bbebeeb6bc41b08c7a01c3ca3f3041 [2020-10-13 13:51:15,539 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-13 13:51:15,540 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-13 13:51:15,541 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-13 13:51:15,541 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-13 13:51:15,545 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-13 13:51:15,545 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 01:51:15" (1/1) ... [2020-10-13 13:51:15,548 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2fe29230 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 01:51:15, skipping insertion in model container [2020-10-13 13:51:15,548 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 01:51:15" (1/1) ... [2020-10-13 13:51:15,556 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-13 13:51:15,619 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-13 13:51:16,179 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-13 13:51:16,192 INFO L203 MainTranslator]: Completed pre-run [2020-10-13 13:51:16,353 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-13 13:51:16,374 INFO L208 MainTranslator]: Completed translation [2020-10-13 13:51:16,375 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 01:51:16 WrapperNode [2020-10-13 13:51:16,375 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-13 13:51:16,376 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-13 13:51:16,376 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-13 13:51:16,376 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-13 13:51:16,387 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 01:51:16" (1/1) ... [2020-10-13 13:51:16,388 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 01:51:16" (1/1) ... [2020-10-13 13:51:16,410 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 01:51:16" (1/1) ... [2020-10-13 13:51:16,413 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 01:51:16" (1/1) ... [2020-10-13 13:51:16,456 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 01:51:16" (1/1) ... [2020-10-13 13:51:16,480 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 01:51:16" (1/1) ... [2020-10-13 13:51:16,499 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 01:51:16" (1/1) ... [2020-10-13 13:51:16,516 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-13 13:51:16,516 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-13 13:51:16,516 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-13 13:51:16,516 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-13 13:51:16,517 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 01:51:16" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-13 13:51:16,604 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-13 13:51:16,605 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-13 13:51:16,605 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-10-13 13:51:16,605 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-13 13:51:16,605 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-10-13 13:51:16,606 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-10-13 13:51:16,606 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-10-13 13:51:16,607 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2020-10-13 13:51:16,607 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-13 13:51:16,607 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-10-13 13:51:16,608 INFO L130 BoogieDeclarations]: Found specification of procedure read [2020-10-13 13:51:16,608 INFO L130 BoogieDeclarations]: Found specification of procedure write [2020-10-13 13:51:16,608 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2020-10-13 13:51:16,609 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2020-10-13 13:51:16,609 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2020-10-13 13:51:16,610 INFO L130 BoogieDeclarations]: Found specification of procedure init [2020-10-13 13:51:16,610 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-10-13 13:51:16,610 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-13 13:51:16,610 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-13 13:51:16,611 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-13 13:51:18,022 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-13 13:51:18,023 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-10-13 13:51:18,029 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 01:51:18 BoogieIcfgContainer [2020-10-13 13:51:18,030 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-13 13:51:18,031 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-13 13:51:18,032 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-13 13:51:18,035 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-13 13:51:18,035 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 01:51:15" (1/3) ... [2020-10-13 13:51:18,036 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3db3f8b3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 01:51:18, skipping insertion in model container [2020-10-13 13:51:18,036 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 01:51:16" (2/3) ... [2020-10-13 13:51:18,037 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3db3f8b3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 01:51:18, skipping insertion in model container [2020-10-13 13:51:18,037 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 01:51:18" (3/3) ... [2020-10-13 13:51:18,039 INFO L109 eAbstractionObserver]: Analyzing ICFG pals_floodmax.3.3.ufo.BOUNDED-6.pals.c.v+nlh-reducer.c [2020-10-13 13:51:18,050 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-13 13:51:18,059 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-13 13:51:18,074 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-13 13:51:18,102 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-10-13 13:51:18,103 INFO L376 AbstractCegarLoop]: Hoare is true [2020-10-13 13:51:18,103 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-13 13:51:18,103 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-13 13:51:18,103 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-13 13:51:18,103 INFO L380 AbstractCegarLoop]: Difference is false [2020-10-13 13:51:18,103 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-13 13:51:18,104 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-13 13:51:18,130 INFO L276 IsEmpty]: Start isEmpty. Operand 310 states. [2020-10-13 13:51:18,146 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2020-10-13 13:51:18,146 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 13:51:18,147 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, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 13:51:18,148 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 13:51:18,154 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 13:51:18,155 INFO L82 PathProgramCache]: Analyzing trace with hash 112483708, now seen corresponding path program 1 times [2020-10-13 13:51:18,164 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 13:51:18,165 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1839656650] [2020-10-13 13:51:18,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 13:51:18,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 13:51:18,862 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:51:19,147 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:51:19,351 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:51:19,473 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:51:19,601 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:51:19,837 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:51:19,943 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:51:20,020 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:51:20,390 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:51:20,903 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:51:21,039 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:51:21,360 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:51:22,906 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:51:23,748 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 13:51:23,748 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 154 [2020-10-13 13:51:23,749 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 13 [2020-10-13 13:51:23,749 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5023 [2020-10-13 13:51:23,754 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 13:51:23,755 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-13 13:51:23,755 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 13:51:23,755 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 45 [2020-10-13 13:51:23,755 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 6 [2020-10-13 13:51:24,232 WARN L193 SmtUtils]: Spent 273.00 ms on a formula simplification that was a NOOP. DAG size: 172 [2020-10-13 13:51:24,234 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 13:51:24,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 13:51:24,244 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:51:24,259 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 13:51:24,260 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 13:51:24,260 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 13:51:24,260 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 18 [2020-10-13 13:51:24,261 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 13:51:24,261 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 13:51:24,261 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 13:51:24,261 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 13:51:24,262 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 13:51:24,320 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 13:51:24,321 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1839656650] [2020-10-13 13:51:24,323 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 13:51:24,324 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-13 13:51:24,325 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1905204708] [2020-10-13 13:51:24,331 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-13 13:51:24,331 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 13:51:24,346 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-13 13:51:24,347 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-13 13:51:24,350 INFO L87 Difference]: Start difference. First operand 310 states. Second operand 5 states. [2020-10-13 13:51:27,440 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 13:51:27,440 INFO L93 Difference]: Finished difference Result 892 states and 1581 transitions. [2020-10-13 13:51:27,441 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-13 13:51:27,442 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 148 [2020-10-13 13:51:27,443 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 13:51:27,463 INFO L225 Difference]: With dead ends: 892 [2020-10-13 13:51:27,463 INFO L226 Difference]: Without dead ends: 587 [2020-10-13 13:51:27,470 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 [2020-10-13 13:51:27,492 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 587 states. [2020-10-13 13:51:27,584 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 587 to 585. [2020-10-13 13:51:27,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 585 states. [2020-10-13 13:51:27,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 585 states to 585 states and 847 transitions. [2020-10-13 13:51:27,591 INFO L78 Accepts]: Start accepts. Automaton has 585 states and 847 transitions. Word has length 148 [2020-10-13 13:51:27,592 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 13:51:27,592 INFO L479 AbstractCegarLoop]: Abstraction has 585 states and 847 transitions. [2020-10-13 13:51:27,592 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-13 13:51:27,592 INFO L276 IsEmpty]: Start isEmpty. Operand 585 states and 847 transitions. [2020-10-13 13:51:27,604 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2020-10-13 13:51:27,605 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 13:51:27,605 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, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 13:51:27,606 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-13 13:51:27,606 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 13:51:27,606 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 13:51:27,607 INFO L82 PathProgramCache]: Analyzing trace with hash -2115959658, now seen corresponding path program 1 times [2020-10-13 13:51:27,607 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 13:51:27,607 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1376933557] [2020-10-13 13:51:27,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 13:51:27,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 13:51:27,675 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:51:27,772 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:51:27,945 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:51:28,079 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:51:28,141 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:51:28,201 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:51:28,365 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:51:28,447 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:51:28,774 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:51:29,923 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:51:30,044 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:51:30,134 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:51:31,414 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:51:31,483 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:51:32,107 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:51:32,636 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:51:32,681 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 13:51:32,681 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 155 [2020-10-13 13:51:32,681 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 16 [2020-10-13 13:51:32,681 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5025 [2020-10-13 13:51:32,682 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 13:51:32,682 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 13:51:32,682 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-13 13:51:32,683 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 3 [2020-10-13 13:51:32,683 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 13:51:32,917 WARN L193 SmtUtils]: Spent 178.00 ms on a formula simplification that was a NOOP. DAG size: 172 [2020-10-13 13:51:32,918 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 13:51:32,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 13:51:32,928 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:51:32,934 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 13:51:32,935 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 13:51:32,935 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 13:51:32,935 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-13 13:51:32,935 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 13:51:32,935 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 13:51:32,936 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 13:51:32,936 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 13:51:32,936 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 13:51:32,969 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 13:51:32,970 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1376933557] [2020-10-13 13:51:32,970 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 13:51:32,970 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-13 13:51:32,971 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1420318430] [2020-10-13 13:51:32,973 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-13 13:51:32,973 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 13:51:32,973 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-13 13:51:32,974 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-13 13:51:32,974 INFO L87 Difference]: Start difference. First operand 585 states and 847 transitions. Second operand 4 states. [2020-10-13 13:51:35,433 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 13:51:35,434 INFO L93 Difference]: Finished difference Result 1709 states and 2471 transitions. [2020-10-13 13:51:35,434 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-13 13:51:35,434 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 149 [2020-10-13 13:51:35,435 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 13:51:35,445 INFO L225 Difference]: With dead ends: 1709 [2020-10-13 13:51:35,446 INFO L226 Difference]: Without dead ends: 1156 [2020-10-13 13:51:35,452 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-13 13:51:35,455 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1156 states. [2020-10-13 13:51:35,506 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1156 to 587. [2020-10-13 13:51:35,507 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 587 states. [2020-10-13 13:51:35,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 587 states to 587 states and 849 transitions. [2020-10-13 13:51:35,510 INFO L78 Accepts]: Start accepts. Automaton has 587 states and 849 transitions. Word has length 149 [2020-10-13 13:51:35,512 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 13:51:35,512 INFO L479 AbstractCegarLoop]: Abstraction has 587 states and 849 transitions. [2020-10-13 13:51:35,513 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-13 13:51:35,513 INFO L276 IsEmpty]: Start isEmpty. Operand 587 states and 849 transitions. [2020-10-13 13:51:35,515 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2020-10-13 13:51:35,515 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 13:51:35,515 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 13:51:35,516 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-13 13:51:35,516 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 13:51:35,516 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 13:51:35,516 INFO L82 PathProgramCache]: Analyzing trace with hash 1564850243, now seen corresponding path program 1 times [2020-10-13 13:51:35,517 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 13:51:35,517 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1766504889] [2020-10-13 13:51:35,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 13:51:35,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 13:51:35,590 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:51:35,650 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:51:35,785 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:51:35,848 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:51:35,902 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:51:35,958 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:51:36,016 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:51:36,092 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:51:36,156 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:51:36,796 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:51:36,922 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:51:37,197 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:51:38,305 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:51:40,568 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 13:51:40,568 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 156 [2020-10-13 13:51:40,569 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 13 [2020-10-13 13:51:40,569 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5006 [2020-10-13 13:51:40,569 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 13:51:40,569 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-13 13:51:40,570 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 13:51:40,570 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 48 [2020-10-13 13:51:40,570 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 13:51:40,871 WARN L193 SmtUtils]: Spent 215.00 ms on a formula simplification that was a NOOP. DAG size: 172 [2020-10-13 13:51:40,873 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 13:51:40,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 13:51:40,881 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:51:40,888 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 13:51:40,889 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 13:51:40,889 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 13:51:40,889 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-13 13:51:40,890 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 13:51:40,890 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 13:51:40,891 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 13:51:40,891 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 13:51:40,891 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 13:51:40,947 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 13:51:40,947 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1766504889] [2020-10-13 13:51:40,949 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 13:51:40,949 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-13 13:51:40,949 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2009498999] [2020-10-13 13:51:40,950 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-13 13:51:40,950 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 13:51:40,950 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-13 13:51:40,952 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-13 13:51:40,953 INFO L87 Difference]: Start difference. First operand 587 states and 849 transitions. Second operand 5 states. [2020-10-13 13:51:43,159 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 13:51:43,160 INFO L93 Difference]: Finished difference Result 1697 states and 2453 transitions. [2020-10-13 13:51:43,161 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-13 13:51:43,161 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 150 [2020-10-13 13:51:43,162 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 13:51:43,168 INFO L225 Difference]: With dead ends: 1697 [2020-10-13 13:51:43,168 INFO L226 Difference]: Without dead ends: 1126 [2020-10-13 13:51:43,172 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-13 13:51:43,174 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1126 states. [2020-10-13 13:51:43,249 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1126 to 1124. [2020-10-13 13:51:43,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1124 states. [2020-10-13 13:51:43,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1124 states to 1124 states and 1609 transitions. [2020-10-13 13:51:43,257 INFO L78 Accepts]: Start accepts. Automaton has 1124 states and 1609 transitions. Word has length 150 [2020-10-13 13:51:43,257 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 13:51:43,257 INFO L479 AbstractCegarLoop]: Abstraction has 1124 states and 1609 transitions. [2020-10-13 13:51:43,257 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-13 13:51:43,257 INFO L276 IsEmpty]: Start isEmpty. Operand 1124 states and 1609 transitions. [2020-10-13 13:51:43,260 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2020-10-13 13:51:43,261 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 13:51:43,261 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 13:51:43,261 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-13 13:51:43,262 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 13:51:43,263 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 13:51:43,264 INFO L82 PathProgramCache]: Analyzing trace with hash 157647613, now seen corresponding path program 1 times [2020-10-13 13:51:43,264 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 13:51:43,264 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [170709460] [2020-10-13 13:51:43,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 13:51:43,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 13:51:43,353 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:51:43,425 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:51:43,492 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:51:43,544 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:51:43,597 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:51:43,652 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:51:43,720 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:51:43,754 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:51:44,087 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:51:44,350 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:51:47,382 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:51:47,515 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:51:47,667 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:51:48,331 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 13:51:48,332 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 156 [2020-10-13 13:51:48,332 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 13 [2020-10-13 13:51:48,332 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5016 [2020-10-13 13:51:48,333 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 13:51:48,333 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-13 13:51:48,333 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-10-13 13:51:48,333 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 21 [2020-10-13 13:51:48,334 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 13:51:48,660 WARN L193 SmtUtils]: Spent 183.00 ms on a formula simplification that was a NOOP. DAG size: 172 [2020-10-13 13:51:48,662 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 13:51:48,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 13:51:48,676 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:51:48,687 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 13:51:48,687 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 13:51:48,688 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 13:51:48,688 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 14 [2020-10-13 13:51:48,689 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 13:51:48,689 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 13:51:48,689 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 13:51:48,690 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 13:51:48,690 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 13:51:48,757 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 13:51:48,758 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [170709460] [2020-10-13 13:51:48,758 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 13:51:48,759 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-13 13:51:48,760 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [816451721] [2020-10-13 13:51:48,761 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-13 13:51:48,761 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 13:51:48,761 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-13 13:51:48,762 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-13 13:51:48,762 INFO L87 Difference]: Start difference. First operand 1124 states and 1609 transitions. Second operand 5 states. [2020-10-13 13:51:50,438 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 13:51:50,438 INFO L93 Difference]: Finished difference Result 1953 states and 2789 transitions. [2020-10-13 13:51:50,438 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-13 13:51:50,439 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 150 [2020-10-13 13:51:50,439 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 13:51:50,445 INFO L225 Difference]: With dead ends: 1953 [2020-10-13 13:51:50,445 INFO L226 Difference]: Without dead ends: 863 [2020-10-13 13:51:50,448 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-13 13:51:50,449 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 863 states. [2020-10-13 13:51:50,528 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 863 to 862. [2020-10-13 13:51:50,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 862 states. [2020-10-13 13:51:50,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 862 states to 862 states and 1227 transitions. [2020-10-13 13:51:50,532 INFO L78 Accepts]: Start accepts. Automaton has 862 states and 1227 transitions. Word has length 150 [2020-10-13 13:51:50,533 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 13:51:50,533 INFO L479 AbstractCegarLoop]: Abstraction has 862 states and 1227 transitions. [2020-10-13 13:51:50,533 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-13 13:51:50,533 INFO L276 IsEmpty]: Start isEmpty. Operand 862 states and 1227 transitions. [2020-10-13 13:51:50,536 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 159 [2020-10-13 13:51:50,536 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 13:51:50,536 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 13:51:50,536 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-13 13:51:50,537 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 13:51:50,537 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 13:51:50,537 INFO L82 PathProgramCache]: Analyzing trace with hash 959752812, now seen corresponding path program 1 times [2020-10-13 13:51:50,537 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 13:51:50,537 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1736499852] [2020-10-13 13:51:50,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 13:51:50,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 13:51:50,613 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:51:50,670 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:51:50,749 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:51:50,813 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:51:50,871 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:51:50,957 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:51:51,003 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:51:51,104 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:51:51,425 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:51:53,008 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:51:55,573 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:51:55,616 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 13:51:55,616 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 164 [2020-10-13 13:51:55,616 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 11 [2020-10-13 13:51:55,616 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5036 [2020-10-13 13:51:55,616 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 13:51:55,617 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-13 13:51:55,617 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 13:51:55,617 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 55 [2020-10-13 13:51:55,617 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 13:51:55,901 WARN L193 SmtUtils]: Spent 186.00 ms on a formula simplification that was a NOOP. DAG size: 172 [2020-10-13 13:51:55,902 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 13:51:55,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 13:51:55,910 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:51:55,919 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 13:51:55,919 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 13:51:55,920 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 13:51:55,920 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12 [2020-10-13 13:51:55,920 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 13:51:55,921 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 13:51:55,921 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 13:51:55,921 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 13:51:55,921 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 13:51:56,028 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 13:51:56,028 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1736499852] [2020-10-13 13:51:56,028 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 13:51:56,029 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-13 13:51:56,029 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [617618500] [2020-10-13 13:51:56,029 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-13 13:51:56,030 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 13:51:56,030 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-13 13:51:56,030 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-13 13:51:56,030 INFO L87 Difference]: Start difference. First operand 862 states and 1227 transitions. Second operand 5 states. [2020-10-13 13:51:58,449 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 13:51:58,449 INFO L93 Difference]: Finished difference Result 2456 states and 3481 transitions. [2020-10-13 13:51:58,450 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-13 13:51:58,450 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 158 [2020-10-13 13:51:58,451 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 13:51:58,460 INFO L225 Difference]: With dead ends: 2456 [2020-10-13 13:51:58,461 INFO L226 Difference]: Without dead ends: 1647 [2020-10-13 13:51:58,464 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-13 13:51:58,466 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1647 states. [2020-10-13 13:51:58,554 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1647 to 1645. [2020-10-13 13:51:58,555 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1645 states. [2020-10-13 13:51:58,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1645 states to 1645 states and 2314 transitions. [2020-10-13 13:51:58,561 INFO L78 Accepts]: Start accepts. Automaton has 1645 states and 2314 transitions. Word has length 158 [2020-10-13 13:51:58,561 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 13:51:58,561 INFO L479 AbstractCegarLoop]: Abstraction has 1645 states and 2314 transitions. [2020-10-13 13:51:58,561 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-13 13:51:58,561 INFO L276 IsEmpty]: Start isEmpty. Operand 1645 states and 2314 transitions. [2020-10-13 13:51:58,565 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 160 [2020-10-13 13:51:58,565 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 13:51:58,565 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 13:51:58,565 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-13 13:51:58,565 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 13:51:58,566 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 13:51:58,566 INFO L82 PathProgramCache]: Analyzing trace with hash 1362532250, now seen corresponding path program 1 times [2020-10-13 13:51:58,566 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 13:51:58,566 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [308541753] [2020-10-13 13:51:58,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 13:51:58,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 13:51:58,601 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:51:58,641 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:51:58,689 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:51:58,732 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:51:58,787 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:51:58,836 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:51:58,952 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:52:00,773 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:52:00,805 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:52:00,960 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:52:01,250 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:52:02,023 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:52:02,068 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:52:02,148 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:52:02,313 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:52:03,592 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 13:52:03,592 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 165 [2020-10-13 13:52:03,592 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 15 [2020-10-13 13:52:03,593 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-10-13 13:52:03,593 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 13:52:03,593 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 13:52:03,593 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-10-13 13:52:03,593 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 3 [2020-10-13 13:52:03,594 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 13:52:03,814 WARN L193 SmtUtils]: Spent 179.00 ms on a formula simplification that was a NOOP. DAG size: 172 [2020-10-13 13:52:03,815 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 13:52:03,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 13:52:03,823 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:52:03,829 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 13:52:03,830 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 13:52:03,830 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 13:52:03,830 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-13 13:52:03,831 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 13:52:03,831 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 13:52:03,831 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 13:52:03,831 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 13:52:03,831 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 13:52:03,888 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 13:52:03,888 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [308541753] [2020-10-13 13:52:03,888 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 13:52:03,889 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-13 13:52:03,889 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1282836746] [2020-10-13 13:52:03,889 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-13 13:52:03,889 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 13:52:03,890 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-13 13:52:03,890 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-13 13:52:03,890 INFO L87 Difference]: Start difference. First operand 1645 states and 2314 transitions. Second operand 4 states. [2020-10-13 13:52:05,468 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 13:52:05,469 INFO L93 Difference]: Finished difference Result 4829 states and 6781 transitions. [2020-10-13 13:52:05,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-13 13:52:05,470 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 159 [2020-10-13 13:52:05,470 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 13:52:05,487 INFO L225 Difference]: With dead ends: 4829 [2020-10-13 13:52:05,487 INFO L226 Difference]: Without dead ends: 3246 [2020-10-13 13:52:05,492 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-13 13:52:05,497 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3246 states. [2020-10-13 13:52:05,602 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3246 to 1651. [2020-10-13 13:52:05,602 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1651 states. [2020-10-13 13:52:05,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1651 states to 1651 states and 2320 transitions. [2020-10-13 13:52:05,608 INFO L78 Accepts]: Start accepts. Automaton has 1651 states and 2320 transitions. Word has length 159 [2020-10-13 13:52:05,608 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 13:52:05,609 INFO L479 AbstractCegarLoop]: Abstraction has 1651 states and 2320 transitions. [2020-10-13 13:52:05,609 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-13 13:52:05,609 INFO L276 IsEmpty]: Start isEmpty. Operand 1651 states and 2320 transitions. [2020-10-13 13:52:05,612 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2020-10-13 13:52:05,613 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 13:52:05,613 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 13:52:05,613 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-13 13:52:05,613 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 13:52:05,614 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 13:52:05,614 INFO L82 PathProgramCache]: Analyzing trace with hash -1136350739, now seen corresponding path program 1 times [2020-10-13 13:52:05,614 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 13:52:05,614 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1265512218] [2020-10-13 13:52:05,614 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 13:52:05,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 13:52:05,676 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:52:05,718 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:52:05,757 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:52:05,787 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:52:05,822 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:52:05,853 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:52:05,881 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:52:08,745 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:52:08,800 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:52:08,911 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:52:10,650 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 13:52:10,651 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 166 [2020-10-13 13:52:10,651 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 10 [2020-10-13 13:52:10,651 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-13 13:52:10,651 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 13:52:10,651 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-13 13:52:10,651 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 22 [2020-10-13 13:52:10,652 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 19 [2020-10-13 13:52:10,652 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 13:52:10,885 WARN L193 SmtUtils]: Spent 175.00 ms on a formula simplification that was a NOOP. DAG size: 172 [2020-10-13 13:52:10,886 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 13:52:10,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 13:52:10,892 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:52:10,898 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 13:52:10,898 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 13:52:10,898 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 13:52:10,898 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-13 13:52:10,898 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 13:52:10,899 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 13:52:10,899 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 13:52:10,899 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 13:52:10,899 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 13:52:10,935 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 13:52:10,936 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1265512218] [2020-10-13 13:52:10,936 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 13:52:10,936 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-13 13:52:10,936 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1484736404] [2020-10-13 13:52:10,937 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-13 13:52:10,937 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 13:52:10,937 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-13 13:52:10,938 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-13 13:52:10,938 INFO L87 Difference]: Start difference. First operand 1651 states and 2320 transitions. Second operand 5 states. [2020-10-13 13:52:12,158 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 13:52:12,158 INFO L93 Difference]: Finished difference Result 3246 states and 4558 transitions. [2020-10-13 13:52:12,159 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-13 13:52:12,159 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 160 [2020-10-13 13:52:12,159 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 13:52:12,167 INFO L225 Difference]: With dead ends: 3246 [2020-10-13 13:52:12,167 INFO L226 Difference]: Without dead ends: 1651 [2020-10-13 13:52:12,171 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-13 13:52:12,174 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1651 states. [2020-10-13 13:52:12,255 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1651 to 1644. [2020-10-13 13:52:12,256 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1644 states. [2020-10-13 13:52:12,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1644 states to 1644 states and 2306 transitions. [2020-10-13 13:52:12,261 INFO L78 Accepts]: Start accepts. Automaton has 1644 states and 2306 transitions. Word has length 160 [2020-10-13 13:52:12,261 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 13:52:12,262 INFO L479 AbstractCegarLoop]: Abstraction has 1644 states and 2306 transitions. [2020-10-13 13:52:12,262 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-13 13:52:12,262 INFO L276 IsEmpty]: Start isEmpty. Operand 1644 states and 2306 transitions. [2020-10-13 13:52:12,265 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2020-10-13 13:52:12,265 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 13:52:12,266 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 13:52:12,266 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-13 13:52:12,266 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 13:52:12,266 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 13:52:12,267 INFO L82 PathProgramCache]: Analyzing trace with hash -2107899468, now seen corresponding path program 1 times [2020-10-13 13:52:12,267 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 13:52:12,267 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [550126592] [2020-10-13 13:52:12,267 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 13:52:12,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 13:52:12,321 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:52:12,384 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:52:12,416 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:52:12,449 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:52:12,499 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:52:12,531 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:52:12,561 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:52:12,584 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:52:12,655 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:52:12,788 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:52:13,141 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:52:14,637 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:52:14,668 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:52:14,875 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:52:14,932 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:52:15,076 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:52:17,300 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 13:52:17,301 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 166 [2020-10-13 13:52:17,301 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 16 [2020-10-13 13:52:17,301 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4999 [2020-10-13 13:52:17,301 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 13:52:17,301 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-13 13:52:17,301 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 13:52:17,301 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-13 13:52:17,302 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 13:52:17,507 WARN L193 SmtUtils]: Spent 159.00 ms on a formula simplification that was a NOOP. DAG size: 172 [2020-10-13 13:52:17,507 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 13:52:17,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 13:52:17,515 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:52:17,520 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 13:52:17,520 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 13:52:17,521 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 13:52:17,521 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-13 13:52:17,521 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 13:52:17,522 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 13:52:17,522 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 13:52:17,523 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 13:52:17,523 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 13:52:17,540 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 13:52:17,541 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [550126592] [2020-10-13 13:52:17,541 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 13:52:17,541 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-13 13:52:17,541 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [587530965] [2020-10-13 13:52:17,542 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-13 13:52:17,542 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 13:52:17,542 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-13 13:52:17,542 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-13 13:52:17,542 INFO L87 Difference]: Start difference. First operand 1644 states and 2306 transitions. Second operand 5 states. [2020-10-13 13:52:19,143 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 13:52:19,144 INFO L93 Difference]: Finished difference Result 4707 states and 6575 transitions. [2020-10-13 13:52:19,144 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-13 13:52:19,144 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 160 [2020-10-13 13:52:19,145 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 13:52:19,156 INFO L225 Difference]: With dead ends: 4707 [2020-10-13 13:52:19,156 INFO L226 Difference]: Without dead ends: 3139 [2020-10-13 13:52:19,162 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-13 13:52:19,166 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3139 states. [2020-10-13 13:52:19,364 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3139 to 3137. [2020-10-13 13:52:19,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3137 states. [2020-10-13 13:52:19,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3137 states to 3137 states and 4333 transitions. [2020-10-13 13:52:19,386 INFO L78 Accepts]: Start accepts. Automaton has 3137 states and 4333 transitions. Word has length 160 [2020-10-13 13:52:19,386 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 13:52:19,386 INFO L479 AbstractCegarLoop]: Abstraction has 3137 states and 4333 transitions. [2020-10-13 13:52:19,387 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-13 13:52:19,387 INFO L276 IsEmpty]: Start isEmpty. Operand 3137 states and 4333 transitions. [2020-10-13 13:52:19,398 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2020-10-13 13:52:19,398 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 13:52:19,398 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 13:52:19,399 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-13 13:52:19,399 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 13:52:19,399 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 13:52:19,400 INFO L82 PathProgramCache]: Analyzing trace with hash -123131049, now seen corresponding path program 1 times [2020-10-13 13:52:19,400 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 13:52:19,403 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [901200126] [2020-10-13 13:52:19,403 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 13:52:19,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 13:52:19,476 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:52:19,520 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:52:19,562 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:52:19,604 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:52:19,650 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:52:19,723 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:52:19,803 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:52:19,895 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:52:19,937 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:52:20,383 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:52:21,678 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:52:21,714 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:52:21,914 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:52:21,948 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:52:22,049 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:52:22,079 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:52:22,230 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:52:24,390 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:52:24,424 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:52:24,464 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 13:52:24,464 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 166 [2020-10-13 13:52:24,464 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 19 [2020-10-13 13:52:24,464 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5015 [2020-10-13 13:52:24,464 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 13:52:24,465 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 13:52:24,465 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-13 13:52:24,465 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 53 [2020-10-13 13:52:24,470 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 5 [2020-10-13 13:52:24,675 WARN L193 SmtUtils]: Spent 162.00 ms on a formula simplification that was a NOOP. DAG size: 172 [2020-10-13 13:52:24,676 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 13:52:24,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 13:52:24,682 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:52:24,688 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 13:52:24,688 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 13:52:24,688 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 13:52:24,689 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-13 13:52:24,689 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 13:52:24,689 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 13:52:24,689 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 13:52:24,689 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 13:52:24,689 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 13:52:24,717 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 13:52:24,717 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [901200126] [2020-10-13 13:52:24,717 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 13:52:24,718 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-13 13:52:24,718 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [160449083] [2020-10-13 13:52:24,718 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-13 13:52:24,719 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 13:52:24,719 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-13 13:52:24,719 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-13 13:52:24,719 INFO L87 Difference]: Start difference. First operand 3137 states and 4333 transitions. Second operand 4 states. [2020-10-13 13:52:26,944 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 13:52:26,944 INFO L93 Difference]: Finished difference Result 4767 states and 6532 transitions. [2020-10-13 13:52:26,945 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-13 13:52:26,945 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 160 [2020-10-13 13:52:26,945 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 13:52:26,956 INFO L225 Difference]: With dead ends: 4767 [2020-10-13 13:52:26,956 INFO L226 Difference]: Without dead ends: 3282 [2020-10-13 13:52:26,960 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-13 13:52:26,964 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3282 states. [2020-10-13 13:52:27,135 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3282 to 3280. [2020-10-13 13:52:27,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3280 states. [2020-10-13 13:52:27,142 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3280 states to 3280 states and 4462 transitions. [2020-10-13 13:52:27,143 INFO L78 Accepts]: Start accepts. Automaton has 3280 states and 4462 transitions. Word has length 160 [2020-10-13 13:52:27,144 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 13:52:27,145 INFO L479 AbstractCegarLoop]: Abstraction has 3280 states and 4462 transitions. [2020-10-13 13:52:27,145 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-13 13:52:27,145 INFO L276 IsEmpty]: Start isEmpty. Operand 3280 states and 4462 transitions. [2020-10-13 13:52:27,151 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 162 [2020-10-13 13:52:27,152 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 13:52:27,152 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 13:52:27,152 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-13 13:52:27,152 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 13:52:27,153 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 13:52:27,153 INFO L82 PathProgramCache]: Analyzing trace with hash 996796692, now seen corresponding path program 1 times [2020-10-13 13:52:27,153 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 13:52:27,153 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1581723885] [2020-10-13 13:52:27,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 13:52:27,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 13:52:27,188 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:52:27,227 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:52:27,256 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:52:27,285 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:52:27,316 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:52:27,416 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:52:27,447 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:52:27,515 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:52:27,617 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:52:28,703 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:52:28,741 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:52:28,775 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:52:29,173 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:52:29,212 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:52:29,687 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:52:31,512 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:52:32,180 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 13:52:32,181 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 167 [2020-10-13 13:52:32,181 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 16 [2020-10-13 13:52:32,181 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-10-13 13:52:32,181 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 13:52:32,181 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 13:52:32,181 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 25 [2020-10-13 13:52:32,182 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 3 [2020-10-13 13:52:32,182 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 13:52:32,385 WARN L193 SmtUtils]: Spent 176.00 ms on a formula simplification that was a NOOP. DAG size: 172 [2020-10-13 13:52:32,386 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 13:52:32,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 13:52:32,391 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:52:32,396 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 13:52:32,396 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 13:52:32,396 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 13:52:32,396 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-13 13:52:32,396 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 13:52:32,396 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 13:52:32,397 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 13:52:32,397 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 13:52:32,397 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 13:52:32,413 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 13:52:32,414 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1581723885] [2020-10-13 13:52:32,414 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 13:52:32,414 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-13 13:52:32,414 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1261428238] [2020-10-13 13:52:32,415 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-13 13:52:32,415 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 13:52:32,415 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-13 13:52:32,416 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-13 13:52:32,416 INFO L87 Difference]: Start difference. First operand 3280 states and 4462 transitions. Second operand 4 states. [2020-10-13 13:52:34,863 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 13:52:34,864 INFO L93 Difference]: Finished difference Result 7878 states and 10718 transitions. [2020-10-13 13:52:34,864 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-13 13:52:34,864 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 161 [2020-10-13 13:52:34,865 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 13:52:34,886 INFO L225 Difference]: With dead ends: 7878 [2020-10-13 13:52:34,886 INFO L226 Difference]: Without dead ends: 6421 [2020-10-13 13:52:34,890 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-13 13:52:34,897 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6421 states. [2020-10-13 13:52:35,141 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6421 to 3292. [2020-10-13 13:52:35,141 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3292 states. [2020-10-13 13:52:35,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3292 states to 3292 states and 4474 transitions. [2020-10-13 13:52:35,147 INFO L78 Accepts]: Start accepts. Automaton has 3292 states and 4474 transitions. Word has length 161 [2020-10-13 13:52:35,147 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 13:52:35,147 INFO L479 AbstractCegarLoop]: Abstraction has 3292 states and 4474 transitions. [2020-10-13 13:52:35,147 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-13 13:52:35,147 INFO L276 IsEmpty]: Start isEmpty. Operand 3292 states and 4474 transitions. [2020-10-13 13:52:35,153 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 163 [2020-10-13 13:52:35,154 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 13:52:35,154 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 13:52:35,154 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-13 13:52:35,154 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 13:52:35,155 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 13:52:35,155 INFO L82 PathProgramCache]: Analyzing trace with hash 2014139488, now seen corresponding path program 1 times [2020-10-13 13:52:35,155 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 13:52:35,155 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1198620675] [2020-10-13 13:52:35,155 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 13:52:35,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 13:52:35,215 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:52:35,257 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:52:35,294 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:52:35,327 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:52:35,363 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:52:35,397 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:52:35,429 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:52:35,454 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:52:36,359 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:52:36,919 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:52:36,950 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:52:39,517 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:52:39,630 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:52:39,705 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:52:39,817 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:52:40,195 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 13:52:40,195 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 168 [2020-10-13 13:52:40,195 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 15 [2020-10-13 13:52:40,195 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5006 [2020-10-13 13:52:40,196 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 13:52:40,196 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-13 13:52:40,196 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 26 [2020-10-13 13:52:40,196 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-13 13:52:40,196 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 13:52:40,438 WARN L193 SmtUtils]: Spent 176.00 ms on a formula simplification that was a NOOP. DAG size: 172 [2020-10-13 13:52:40,439 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 13:52:40,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 13:52:40,445 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:52:40,449 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 13:52:40,449 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 13:52:40,449 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 13:52:40,450 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-13 13:52:40,450 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 13:52:40,450 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 13:52:40,450 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 13:52:40,450 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 13:52:40,450 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 13:52:40,473 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 13:52:40,473 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1198620675] [2020-10-13 13:52:40,473 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 13:52:40,473 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-13 13:52:40,474 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [116913023] [2020-10-13 13:52:40,474 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-13 13:52:40,474 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 13:52:40,474 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-13 13:52:40,475 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-13 13:52:40,475 INFO L87 Difference]: Start difference. First operand 3292 states and 4474 transitions. Second operand 5 states. [2020-10-13 13:52:41,781 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 13:52:41,781 INFO L93 Difference]: Finished difference Result 4047 states and 5495 transitions. [2020-10-13 13:52:41,782 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-13 13:52:41,782 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 162 [2020-10-13 13:52:41,783 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 13:52:41,793 INFO L225 Difference]: With dead ends: 4047 [2020-10-13 13:52:41,793 INFO L226 Difference]: Without dead ends: 2566 [2020-10-13 13:52:41,797 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-13 13:52:41,800 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2566 states. [2020-10-13 13:52:41,914 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2566 to 2556. [2020-10-13 13:52:41,914 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2556 states. [2020-10-13 13:52:41,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2556 states to 2556 states and 3468 transitions. [2020-10-13 13:52:41,918 INFO L78 Accepts]: Start accepts. Automaton has 2556 states and 3468 transitions. Word has length 162 [2020-10-13 13:52:41,919 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 13:52:41,919 INFO L479 AbstractCegarLoop]: Abstraction has 2556 states and 3468 transitions. [2020-10-13 13:52:41,919 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-13 13:52:41,919 INFO L276 IsEmpty]: Start isEmpty. Operand 2556 states and 3468 transitions. [2020-10-13 13:52:41,924 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 167 [2020-10-13 13:52:41,924 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 13:52:41,924 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 13:52:41,925 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-13 13:52:41,925 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 13:52:41,925 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 13:52:41,925 INFO L82 PathProgramCache]: Analyzing trace with hash -2068895367, now seen corresponding path program 1 times [2020-10-13 13:52:41,926 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 13:52:41,926 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [729287326] [2020-10-13 13:52:41,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 13:52:41,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 13:52:41,980 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:52:42,009 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:52:42,046 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:52:42,088 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:52:42,168 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:52:42,343 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:52:42,631 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:52:43,433 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:52:43,528 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:52:43,729 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:52:43,902 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:52:45,834 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:52:46,127 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:52:46,971 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 13:52:46,971 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 172 [2020-10-13 13:52:46,972 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 13 [2020-10-13 13:52:46,972 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5010 [2020-10-13 13:52:46,972 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 13:52:46,972 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-13 13:52:46,972 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 13:52:46,972 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 59 [2020-10-13 13:52:46,972 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 13:52:47,197 WARN L193 SmtUtils]: Spent 178.00 ms on a formula simplification that was a NOOP. DAG size: 172 [2020-10-13 13:52:47,198 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 13:52:47,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 13:52:47,205 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:52:47,209 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 13:52:47,209 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 13:52:47,210 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 13:52:47,210 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-13 13:52:47,210 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 13:52:47,210 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 13:52:47,210 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 13:52:47,210 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 13:52:47,210 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 13:52:47,237 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 13:52:47,238 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [729287326] [2020-10-13 13:52:47,238 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 13:52:47,238 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-13 13:52:47,238 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [347541625] [2020-10-13 13:52:47,239 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-13 13:52:47,239 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 13:52:47,239 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-13 13:52:47,239 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-13 13:52:47,239 INFO L87 Difference]: Start difference. First operand 2556 states and 3468 transitions. Second operand 5 states. [2020-10-13 13:52:49,423 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 13:52:49,423 INFO L93 Difference]: Finished difference Result 5613 states and 7692 transitions. [2020-10-13 13:52:49,424 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-13 13:52:49,424 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 166 [2020-10-13 13:52:49,424 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 13:52:49,431 INFO L225 Difference]: With dead ends: 5613 [2020-10-13 13:52:49,431 INFO L226 Difference]: Without dead ends: 3452 [2020-10-13 13:52:49,436 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-13 13:52:49,440 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3452 states. [2020-10-13 13:52:49,579 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3452 to 3450. [2020-10-13 13:52:49,579 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3450 states. [2020-10-13 13:52:49,585 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3450 states to 3450 states and 4638 transitions. [2020-10-13 13:52:49,585 INFO L78 Accepts]: Start accepts. Automaton has 3450 states and 4638 transitions. Word has length 166 [2020-10-13 13:52:49,585 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 13:52:49,586 INFO L479 AbstractCegarLoop]: Abstraction has 3450 states and 4638 transitions. [2020-10-13 13:52:49,586 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-13 13:52:49,586 INFO L276 IsEmpty]: Start isEmpty. Operand 3450 states and 4638 transitions. [2020-10-13 13:52:49,591 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 169 [2020-10-13 13:52:49,591 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 13:52:49,591 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 13:52:49,591 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-13 13:52:49,592 INFO L427 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 13:52:49,592 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 13:52:49,592 INFO L82 PathProgramCache]: Analyzing trace with hash -1959722922, now seen corresponding path program 1 times [2020-10-13 13:52:49,592 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 13:52:49,593 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1078042912] [2020-10-13 13:52:49,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 13:52:49,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 13:52:49,642 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:52:49,679 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:52:49,731 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:52:49,781 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:52:49,848 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:52:50,430 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:52:50,779 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:52:51,408 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:52:51,938 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:52:51,963 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:52:52,545 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:52:52,614 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:52:52,646 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:52:52,702 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:52:53,022 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:52:53,927 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:52:53,970 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:52:54,657 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 13:52:54,657 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 174 [2020-10-13 13:52:54,658 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 17 [2020-10-13 13:52:54,658 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5032 [2020-10-13 13:52:54,658 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 13:52:54,658 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 13:52:54,658 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-13 13:52:54,658 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 63 [2020-10-13 13:52:54,659 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 13:52:54,880 WARN L193 SmtUtils]: Spent 176.00 ms on a formula simplification that was a NOOP. DAG size: 172 [2020-10-13 13:52:54,881 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 13:52:54,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 13:52:54,887 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:52:54,891 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 13:52:54,891 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 13:52:54,891 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 13:52:54,891 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-13 13:52:54,891 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 13:52:54,891 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 13:52:54,892 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 13:52:54,892 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 13:52:54,892 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 13:52:54,919 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 13:52:54,920 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1078042912] [2020-10-13 13:52:54,920 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 13:52:54,920 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-13 13:52:54,920 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [547868570] [2020-10-13 13:52:54,921 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-13 13:52:54,921 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 13:52:54,921 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-13 13:52:54,921 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-13 13:52:54,922 INFO L87 Difference]: Start difference. First operand 3450 states and 4638 transitions. Second operand 4 states. [2020-10-13 13:52:57,391 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 13:52:57,391 INFO L93 Difference]: Finished difference Result 8769 states and 11945 transitions. [2020-10-13 13:52:57,392 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-13 13:52:57,392 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 168 [2020-10-13 13:52:57,392 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 13:52:57,406 INFO L225 Difference]: With dead ends: 8769 [2020-10-13 13:52:57,406 INFO L226 Difference]: Without dead ends: 6366 [2020-10-13 13:52:57,413 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-13 13:52:57,420 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6366 states. [2020-10-13 13:52:57,842 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6366 to 6364. [2020-10-13 13:52:57,842 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6364 states. [2020-10-13 13:52:57,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6364 states to 6364 states and 8493 transitions. [2020-10-13 13:52:57,849 INFO L78 Accepts]: Start accepts. Automaton has 6364 states and 8493 transitions. Word has length 168 [2020-10-13 13:52:57,849 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 13:52:57,849 INFO L479 AbstractCegarLoop]: Abstraction has 6364 states and 8493 transitions. [2020-10-13 13:52:57,850 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-13 13:52:57,850 INFO L276 IsEmpty]: Start isEmpty. Operand 6364 states and 8493 transitions. [2020-10-13 13:52:57,857 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 169 [2020-10-13 13:52:57,858 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 13:52:57,858 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 13:52:57,858 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-13 13:52:57,858 INFO L427 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 13:52:57,859 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 13:52:57,859 INFO L82 PathProgramCache]: Analyzing trace with hash 1156247539, now seen corresponding path program 1 times [2020-10-13 13:52:57,859 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 13:52:57,859 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1280995578] [2020-10-13 13:52:57,859 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 13:52:57,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 13:52:57,925 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:52:57,971 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:52:58,019 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:52:58,062 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:52:58,099 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:52:58,134 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:52:58,213 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:52:59,241 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:52:59,373 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:53:00,045 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:53:02,103 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:53:02,138 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:53:02,169 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:53:02,644 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:53:02,899 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 13:53:02,899 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 174 [2020-10-13 13:53:02,899 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 14 [2020-10-13 13:53:02,899 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5006 [2020-10-13 13:53:02,899 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 13:53:02,899 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-13 13:53:02,899 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 13:53:02,900 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-13 13:53:02,900 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 13:53:03,145 WARN L193 SmtUtils]: Spent 177.00 ms on a formula simplification that was a NOOP. DAG size: 172 [2020-10-13 13:53:03,146 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 13:53:03,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 13:53:03,154 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:53:03,163 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 13:53:03,163 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 13:53:03,163 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 13:53:03,163 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-13 13:53:03,164 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 13:53:03,164 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 13:53:03,164 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 13:53:03,164 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 13:53:03,164 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 13:53:03,187 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 13:53:03,188 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1280995578] [2020-10-13 13:53:03,188 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 13:53:03,188 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-13 13:53:03,188 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1480676718] [2020-10-13 13:53:03,189 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-13 13:53:03,190 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 13:53:03,190 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-13 13:53:03,190 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-13 13:53:03,190 INFO L87 Difference]: Start difference. First operand 6364 states and 8493 transitions. Second operand 5 states. [2020-10-13 13:53:05,211 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 13:53:05,211 INFO L93 Difference]: Finished difference Result 14011 states and 18789 transitions. [2020-10-13 13:53:05,212 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-13 13:53:05,212 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 168 [2020-10-13 13:53:05,212 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 13:53:05,233 INFO L225 Difference]: With dead ends: 14011 [2020-10-13 13:53:05,233 INFO L226 Difference]: Without dead ends: 9814 [2020-10-13 13:53:05,243 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-13 13:53:05,255 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9814 states. [2020-10-13 13:53:05,694 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9814 to 6350. [2020-10-13 13:53:05,694 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6350 states. [2020-10-13 13:53:05,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6350 states to 6350 states and 8471 transitions. [2020-10-13 13:53:05,701 INFO L78 Accepts]: Start accepts. Automaton has 6350 states and 8471 transitions. Word has length 168 [2020-10-13 13:53:05,701 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 13:53:05,702 INFO L479 AbstractCegarLoop]: Abstraction has 6350 states and 8471 transitions. [2020-10-13 13:53:05,702 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-13 13:53:05,702 INFO L276 IsEmpty]: Start isEmpty. Operand 6350 states and 8471 transitions. [2020-10-13 13:53:05,709 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 170 [2020-10-13 13:53:05,709 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 13:53:05,710 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 13:53:05,710 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-13 13:53:05,710 INFO L427 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 13:53:05,710 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 13:53:05,710 INFO L82 PathProgramCache]: Analyzing trace with hash 1446682736, now seen corresponding path program 1 times [2020-10-13 13:53:05,711 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 13:53:05,711 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [654964677] [2020-10-13 13:53:05,711 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 13:53:05,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 13:53:05,745 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:53:05,783 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:53:05,831 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:53:05,872 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:53:06,124 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:53:06,401 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:53:06,537 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:53:07,327 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:53:07,402 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:53:07,436 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:53:07,467 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:53:07,823 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:53:10,792 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 13:53:10,793 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 175 [2020-10-13 13:53:10,793 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 12 [2020-10-13 13:53:10,793 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5060 [2020-10-13 13:53:10,794 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 13:53:10,794 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 13:53:10,794 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 24 [2020-10-13 13:53:10,794 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 4 [2020-10-13 13:53:10,794 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 13:53:11,005 WARN L193 SmtUtils]: Spent 170.00 ms on a formula simplification that was a NOOP. DAG size: 172 [2020-10-13 13:53:11,006 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 13:53:11,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 13:53:11,015 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:53:11,020 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 13:53:11,020 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 13:53:11,021 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 13:53:11,021 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-13 13:53:11,021 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 13:53:11,021 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 13:53:11,021 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 13:53:11,022 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 13:53:11,022 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 13:53:11,048 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 13:53:11,049 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [654964677] [2020-10-13 13:53:11,049 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 13:53:11,049 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-13 13:53:11,049 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1529364314] [2020-10-13 13:53:11,050 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-13 13:53:11,050 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 13:53:11,050 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-13 13:53:11,050 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-13 13:53:11,050 INFO L87 Difference]: Start difference. First operand 6350 states and 8471 transitions. Second operand 4 states. [2020-10-13 13:53:12,727 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 13:53:12,727 INFO L93 Difference]: Finished difference Result 9986 states and 13375 transitions. [2020-10-13 13:53:12,728 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-13 13:53:12,728 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 169 [2020-10-13 13:53:12,728 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 13:53:12,750 INFO L225 Difference]: With dead ends: 9986 [2020-10-13 13:53:12,750 INFO L226 Difference]: Without dead ends: 7731 [2020-10-13 13:53:12,759 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-13 13:53:12,768 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7731 states. [2020-10-13 13:53:13,210 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7731 to 6244. [2020-10-13 13:53:13,210 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6244 states. [2020-10-13 13:53:13,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6244 states to 6244 states and 8345 transitions. [2020-10-13 13:53:13,218 INFO L78 Accepts]: Start accepts. Automaton has 6244 states and 8345 transitions. Word has length 169 [2020-10-13 13:53:13,218 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 13:53:13,218 INFO L479 AbstractCegarLoop]: Abstraction has 6244 states and 8345 transitions. [2020-10-13 13:53:13,218 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-13 13:53:13,218 INFO L276 IsEmpty]: Start isEmpty. Operand 6244 states and 8345 transitions. [2020-10-13 13:53:13,224 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 171 [2020-10-13 13:53:13,224 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 13:53:13,224 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 13:53:13,224 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-13 13:53:13,224 INFO L427 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 13:53:13,225 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 13:53:13,225 INFO L82 PathProgramCache]: Analyzing trace with hash -1860249519, now seen corresponding path program 1 times [2020-10-13 13:53:13,225 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 13:53:13,225 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1517853908] [2020-10-13 13:53:13,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 13:53:13,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 13:53:13,282 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:53:13,328 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:53:13,366 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:53:13,394 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:53:13,597 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:53:13,682 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:53:13,838 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:53:13,933 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:53:14,473 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:53:16,382 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:53:16,449 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:53:18,283 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 13:53:18,283 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 176 [2020-10-13 13:53:18,283 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 11 [2020-10-13 13:53:18,284 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5025 [2020-10-13 13:53:18,284 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 13:53:18,284 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-13 13:53:18,284 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 28 [2020-10-13 13:53:18,284 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-10-13 13:53:18,284 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 13:53:18,518 WARN L193 SmtUtils]: Spent 172.00 ms on a formula simplification that was a NOOP. DAG size: 172 [2020-10-13 13:53:18,518 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 13:53:18,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 13:53:18,524 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:53:18,529 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 13:53:18,529 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 13:53:18,529 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 13:53:18,529 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-13 13:53:18,530 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 13:53:18,530 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 13:53:18,530 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 13:53:18,530 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 13:53:18,530 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 13:53:18,562 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 13:53:18,563 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1517853908] [2020-10-13 13:53:18,563 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 13:53:18,563 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-13 13:53:18,563 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1135776751] [2020-10-13 13:53:18,564 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-13 13:53:18,564 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 13:53:18,564 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-13 13:53:18,564 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-13 13:53:18,564 INFO L87 Difference]: Start difference. First operand 6244 states and 8345 transitions. Second operand 5 states. [2020-10-13 13:53:19,951 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 13:53:19,951 INFO L93 Difference]: Finished difference Result 10190 states and 13659 transitions. [2020-10-13 13:53:19,951 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-13 13:53:19,951 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 170 [2020-10-13 13:53:19,952 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 13:53:19,959 INFO L225 Difference]: With dead ends: 10190 [2020-10-13 13:53:19,959 INFO L226 Difference]: Without dead ends: 5182 [2020-10-13 13:53:19,967 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-13 13:53:19,973 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5182 states. [2020-10-13 13:53:20,276 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5182 to 5176. [2020-10-13 13:53:20,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5176 states. [2020-10-13 13:53:20,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5176 states to 5176 states and 6890 transitions. [2020-10-13 13:53:20,282 INFO L78 Accepts]: Start accepts. Automaton has 5176 states and 6890 transitions. Word has length 170 [2020-10-13 13:53:20,282 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 13:53:20,282 INFO L479 AbstractCegarLoop]: Abstraction has 5176 states and 6890 transitions. [2020-10-13 13:53:20,282 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-13 13:53:20,283 INFO L276 IsEmpty]: Start isEmpty. Operand 5176 states and 6890 transitions. [2020-10-13 13:53:20,287 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 175 [2020-10-13 13:53:20,287 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 13:53:20,287 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 13:53:20,288 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-13 13:53:20,288 INFO L427 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 13:53:20,288 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 13:53:20,288 INFO L82 PathProgramCache]: Analyzing trace with hash -595726274, now seen corresponding path program 1 times [2020-10-13 13:53:20,288 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 13:53:20,288 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1880999545] [2020-10-13 13:53:20,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 13:53:20,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 13:53:20,340 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:53:20,387 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:53:20,433 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:53:20,491 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:53:20,713 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:53:20,814 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:53:20,982 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:53:21,572 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:53:22,824 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:53:22,860 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:53:22,920 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:53:23,204 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:53:23,947 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:53:24,120 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:53:25,088 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:53:25,181 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:53:25,326 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 13:53:25,327 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 180 [2020-10-13 13:53:25,327 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 16 [2020-10-13 13:53:25,327 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5009 [2020-10-13 13:53:25,327 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 13:53:25,327 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-13 13:53:25,328 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 13:53:25,328 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 66 [2020-10-13 13:53:25,328 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 13:53:25,600 WARN L193 SmtUtils]: Spent 165.00 ms on a formula simplification that was a NOOP. DAG size: 172 [2020-10-13 13:53:25,601 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 13:53:25,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 13:53:25,606 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:53:25,611 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 13:53:25,612 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 13:53:25,612 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 13:53:25,612 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-13 13:53:25,612 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 13:53:25,613 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 13:53:25,613 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 13:53:25,613 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 13:53:25,613 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 13:53:25,657 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 13:53:25,657 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1880999545] [2020-10-13 13:53:25,658 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 13:53:25,658 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-13 13:53:25,658 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [48676016] [2020-10-13 13:53:25,659 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-13 13:53:25,661 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 13:53:25,661 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-13 13:53:25,661 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-13 13:53:25,661 INFO L87 Difference]: Start difference. First operand 5176 states and 6890 transitions. Second operand 5 states. [2020-10-13 13:53:28,143 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 13:53:28,143 INFO L93 Difference]: Finished difference Result 6665 states and 8922 transitions. [2020-10-13 13:53:28,144 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-13 13:53:28,144 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 174 [2020-10-13 13:53:28,144 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 13:53:28,149 INFO L225 Difference]: With dead ends: 6665 [2020-10-13 13:53:28,149 INFO L226 Difference]: Without dead ends: 5178 [2020-10-13 13:53:28,152 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-13 13:53:28,157 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5178 states. [2020-10-13 13:53:28,429 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5178 to 5124. [2020-10-13 13:53:28,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5124 states. [2020-10-13 13:53:28,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5124 states to 5124 states and 6815 transitions. [2020-10-13 13:53:28,435 INFO L78 Accepts]: Start accepts. Automaton has 5124 states and 6815 transitions. Word has length 174 [2020-10-13 13:53:28,435 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 13:53:28,435 INFO L479 AbstractCegarLoop]: Abstraction has 5124 states and 6815 transitions. [2020-10-13 13:53:28,436 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-13 13:53:28,436 INFO L276 IsEmpty]: Start isEmpty. Operand 5124 states and 6815 transitions. [2020-10-13 13:53:28,440 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 177 [2020-10-13 13:53:28,440 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 13:53:28,440 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 13:53:28,440 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-13 13:53:28,441 INFO L427 AbstractCegarLoop]: === Iteration 18 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 13:53:28,441 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 13:53:28,441 INFO L82 PathProgramCache]: Analyzing trace with hash -1711616883, now seen corresponding path program 1 times [2020-10-13 13:53:28,441 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 13:53:28,441 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [437410649] [2020-10-13 13:53:28,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 13:53:28,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 13:53:28,495 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:53:28,543 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:53:28,593 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:53:28,658 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:53:28,837 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:53:28,925 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:53:29,035 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:53:29,484 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:53:29,518 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:53:29,575 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:53:29,861 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:53:30,610 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:53:30,780 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:53:31,398 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:53:31,484 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:53:32,139 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:53:32,491 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:53:33,492 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 13:53:33,492 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 182 [2020-10-13 13:53:33,492 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 17 [2020-10-13 13:53:33,493 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5021 [2020-10-13 13:53:33,493 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 13:53:33,493 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-13 13:53:33,493 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 13:53:33,493 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 69 [2020-10-13 13:53:33,493 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 13:53:33,713 WARN L193 SmtUtils]: Spent 171.00 ms on a formula simplification that was a NOOP. DAG size: 172 [2020-10-13 13:53:33,714 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 13:53:33,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 13:53:33,720 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:53:33,724 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 13:53:33,725 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 13:53:33,725 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 13:53:33,725 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-13 13:53:33,725 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 13:53:33,725 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 13:53:33,725 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 13:53:33,725 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 13:53:33,726 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 13:53:33,755 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 13:53:33,755 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [437410649] [2020-10-13 13:53:33,755 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 13:53:33,755 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-13 13:53:33,755 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [985426599] [2020-10-13 13:53:33,756 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-13 13:53:33,756 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 13:53:33,756 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-13 13:53:33,757 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-13 13:53:33,757 INFO L87 Difference]: Start difference. First operand 5124 states and 6815 transitions. Second operand 5 states. [2020-10-13 13:53:35,547 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 13:53:35,547 INFO L93 Difference]: Finished difference Result 7885 states and 10579 transitions. [2020-10-13 13:53:35,547 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-13 13:53:35,547 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 176 [2020-10-13 13:53:35,548 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 13:53:35,552 INFO L225 Difference]: With dead ends: 7885 [2020-10-13 13:53:35,552 INFO L226 Difference]: Without dead ends: 4788 [2020-10-13 13:53:35,556 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-13 13:53:35,559 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4788 states. [2020-10-13 13:53:35,830 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4788 to 4651. [2020-10-13 13:53:35,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4651 states. [2020-10-13 13:53:35,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4651 states to 4651 states and 6141 transitions. [2020-10-13 13:53:35,837 INFO L78 Accepts]: Start accepts. Automaton has 4651 states and 6141 transitions. Word has length 176 [2020-10-13 13:53:35,837 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 13:53:35,837 INFO L479 AbstractCegarLoop]: Abstraction has 4651 states and 6141 transitions. [2020-10-13 13:53:35,837 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-13 13:53:35,837 INFO L276 IsEmpty]: Start isEmpty. Operand 4651 states and 6141 transitions. [2020-10-13 13:53:35,842 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 179 [2020-10-13 13:53:35,842 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 13:53:35,842 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 13:53:35,842 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-13 13:53:35,842 INFO L427 AbstractCegarLoop]: === Iteration 19 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 13:53:35,842 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 13:53:35,843 INFO L82 PathProgramCache]: Analyzing trace with hash 302317697, now seen corresponding path program 1 times [2020-10-13 13:53:35,843 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 13:53:35,843 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1080242785] [2020-10-13 13:53:35,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 13:53:35,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 13:53:35,883 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:53:35,909 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:53:35,946 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:53:36,348 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:53:36,414 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:53:36,509 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:53:36,858 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:53:37,185 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:53:37,362 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:53:40,868 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 13:53:40,868 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 184 [2020-10-13 13:53:40,868 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-13 13:53:40,868 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-13 13:53:40,869 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 13:53:40,869 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 13:53:40,869 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 79 [2020-10-13 13:53:40,869 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 64 [2020-10-13 13:53:40,869 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 13:53:41,080 WARN L193 SmtUtils]: Spent 179.00 ms on a formula simplification that was a NOOP. DAG size: 172 [2020-10-13 13:53:41,081 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 13:53:41,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 13:53:41,086 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:53:41,092 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 13:53:41,093 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 13:53:41,093 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 13:53:41,093 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-13 13:53:41,093 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 13:53:41,093 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 13:53:41,093 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 13:53:41,093 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 13:53:41,093 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 13:53:41,115 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 13:53:41,115 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1080242785] [2020-10-13 13:53:41,115 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 13:53:41,115 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-13 13:53:41,116 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1297592121] [2020-10-13 13:53:41,116 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-13 13:53:41,116 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 13:53:41,117 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-13 13:53:41,117 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-13 13:53:41,117 INFO L87 Difference]: Start difference. First operand 4651 states and 6141 transitions. Second operand 4 states. [2020-10-13 13:53:43,011 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 13:53:43,012 INFO L93 Difference]: Finished difference Result 10817 states and 14705 transitions. [2020-10-13 13:53:43,012 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-13 13:53:43,013 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 178 [2020-10-13 13:53:43,013 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 13:53:43,022 INFO L225 Difference]: With dead ends: 10817 [2020-10-13 13:53:43,022 INFO L226 Difference]: Without dead ends: 8070 [2020-10-13 13:53:43,029 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-13 13:53:43,035 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8070 states. [2020-10-13 13:53:43,511 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8070 to 8068. [2020-10-13 13:53:43,512 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8068 states. [2020-10-13 13:53:43,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8068 states to 8068 states and 10742 transitions. [2020-10-13 13:53:43,521 INFO L78 Accepts]: Start accepts. Automaton has 8068 states and 10742 transitions. Word has length 178 [2020-10-13 13:53:43,521 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 13:53:43,522 INFO L479 AbstractCegarLoop]: Abstraction has 8068 states and 10742 transitions. [2020-10-13 13:53:43,522 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-13 13:53:43,522 INFO L276 IsEmpty]: Start isEmpty. Operand 8068 states and 10742 transitions. [2020-10-13 13:53:43,528 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 179 [2020-10-13 13:53:43,528 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 13:53:43,529 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 13:53:43,529 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-13 13:53:43,529 INFO L427 AbstractCegarLoop]: === Iteration 20 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 13:53:43,529 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 13:53:43,529 INFO L82 PathProgramCache]: Analyzing trace with hash -1297363044, now seen corresponding path program 1 times [2020-10-13 13:53:43,530 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 13:53:43,530 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [116705179] [2020-10-13 13:53:43,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 13:53:43,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 13:53:43,568 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:53:43,609 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:53:43,742 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:53:43,866 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:53:44,083 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:53:44,458 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:53:44,924 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:53:47,000 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:53:47,861 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:53:48,185 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:53:48,570 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 13:53:48,570 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 184 [2020-10-13 13:53:48,570 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 10 [2020-10-13 13:53:48,570 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5017 [2020-10-13 13:53:48,570 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 13:53:48,571 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-13 13:53:48,571 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-13 13:53:48,571 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 75 [2020-10-13 13:53:48,571 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 13:53:48,815 WARN L193 SmtUtils]: Spent 187.00 ms on a formula simplification that was a NOOP. DAG size: 172 [2020-10-13 13:53:48,816 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 13:53:48,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 13:53:48,827 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:53:48,842 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 13:53:48,842 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 13:53:48,842 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 13:53:48,843 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 18 [2020-10-13 13:53:48,843 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 13:53:48,843 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 13:53:48,843 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 13:53:48,843 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-13 13:53:48,843 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 13:53:48,875 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 13:53:48,876 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [116705179] [2020-10-13 13:53:48,876 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 13:53:48,876 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-13 13:53:48,876 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1880109231] [2020-10-13 13:53:48,877 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-13 13:53:48,877 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 13:53:48,877 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-13 13:53:48,877 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-13 13:53:48,877 INFO L87 Difference]: Start difference. First operand 8068 states and 10742 transitions. Second operand 6 states. [2020-10-13 13:53:49,125 WARN L193 SmtUtils]: Spent 207.00 ms on a formula simplification that was a NOOP. DAG size: 178 [2020-10-13 13:53:50,815 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 13:53:50,815 INFO L93 Difference]: Finished difference Result 10977 states and 14843 transitions. [2020-10-13 13:53:50,815 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-13 13:53:50,816 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 178 [2020-10-13 13:53:50,816 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 13:53:50,821 INFO L225 Difference]: With dead ends: 10977 [2020-10-13 13:53:50,821 INFO L226 Difference]: Without dead ends: 4651 [2020-10-13 13:53:50,829 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2020-10-13 13:53:50,833 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4651 states. [2020-10-13 13:53:51,120 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4651 to 4651. [2020-10-13 13:53:51,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4651 states. [2020-10-13 13:53:51,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4651 states to 4651 states and 6063 transitions. [2020-10-13 13:53:51,126 INFO L78 Accepts]: Start accepts. Automaton has 4651 states and 6063 transitions. Word has length 178 [2020-10-13 13:53:51,127 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 13:53:51,127 INFO L479 AbstractCegarLoop]: Abstraction has 4651 states and 6063 transitions. [2020-10-13 13:53:51,127 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-13 13:53:51,127 INFO L276 IsEmpty]: Start isEmpty. Operand 4651 states and 6063 transitions. [2020-10-13 13:53:51,131 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 179 [2020-10-13 13:53:51,131 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 13:53:51,132 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 13:53:51,132 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-10-13 13:53:51,132 INFO L427 AbstractCegarLoop]: === Iteration 21 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 13:53:51,132 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 13:53:51,132 INFO L82 PathProgramCache]: Analyzing trace with hash -167312228, now seen corresponding path program 1 times [2020-10-13 13:53:51,132 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 13:53:51,133 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [503292398] [2020-10-13 13:53:51,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 13:53:51,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 13:53:51,224 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:53:51,305 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:53:51,499 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:53:51,638 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:53:52,531 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:53:54,369 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:53:56,205 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:53:56,383 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 13:53:56,384 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 184 [2020-10-13 13:53:56,384 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-13 13:53:56,384 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5199 [2020-10-13 13:53:56,385 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 13:53:56,385 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-13 13:53:56,385 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 13:53:56,386 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 97 [2020-10-13 13:53:56,386 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 13:53:57,088 WARN L193 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 24 [2020-10-13 13:53:57,329 WARN L193 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 36 [2020-10-13 13:53:57,468 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 42 [2020-10-13 13:53:57,943 WARN L193 SmtUtils]: Spent 404.00 ms on a formula simplification. DAG size of input: 143 DAG size of output: 57 [2020-10-13 13:53:58,459 WARN L193 SmtUtils]: Spent 187.00 ms on a formula simplification that was a NOOP. DAG size: 172 [2020-10-13 13:53:58,460 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 13:53:58,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 13:53:58,466 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:53:58,472 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 13:53:58,473 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 13:53:58,473 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 13:53:58,473 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-13 13:53:58,473 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 13:53:58,473 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 13:53:58,474 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 13:53:58,474 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 13:53:58,474 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 13:53:58,599 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 13:53:58,599 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [503292398] [2020-10-13 13:53:58,600 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 13:53:58,600 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2020-10-13 13:53:58,600 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [967951269] [2020-10-13 13:53:58,600 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-13 13:53:58,600 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 13:53:58,601 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-13 13:53:58,601 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=300, Unknown=0, NotChecked=0, Total=342 [2020-10-13 13:53:58,601 INFO L87 Difference]: Start difference. First operand 4651 states and 6063 transitions. Second operand 19 states. [2020-10-13 13:53:58,906 WARN L193 SmtUtils]: Spent 202.00 ms on a formula simplification that was a NOOP. DAG size: 183 [2020-10-13 13:54:00,062 WARN L193 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 46 [2020-10-13 13:54:00,716 WARN L193 SmtUtils]: Spent 318.00 ms on a formula simplification. DAG size of input: 121 DAG size of output: 82 [2020-10-13 13:54:01,120 WARN L193 SmtUtils]: Spent 335.00 ms on a formula simplification. DAG size of input: 126 DAG size of output: 88 [2020-10-13 13:54:09,972 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 13:54:09,972 INFO L93 Difference]: Finished difference Result 16995 states and 23250 transitions. [2020-10-13 13:54:09,972 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-13 13:54:09,973 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 178 [2020-10-13 13:54:09,973 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 13:54:09,990 INFO L225 Difference]: With dead ends: 16995 [2020-10-13 13:54:09,990 INFO L226 Difference]: Without dead ends: 15685 [2020-10-13 13:54:09,997 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 170 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=254, Invalid=1152, Unknown=0, NotChecked=0, Total=1406 [2020-10-13 13:54:10,011 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15685 states. [2020-10-13 13:54:10,603 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15685 to 5090. [2020-10-13 13:54:10,604 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5090 states. [2020-10-13 13:54:10,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5090 states to 5090 states and 6584 transitions. [2020-10-13 13:54:10,609 INFO L78 Accepts]: Start accepts. Automaton has 5090 states and 6584 transitions. Word has length 178 [2020-10-13 13:54:10,609 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 13:54:10,609 INFO L479 AbstractCegarLoop]: Abstraction has 5090 states and 6584 transitions. [2020-10-13 13:54:10,610 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-13 13:54:10,610 INFO L276 IsEmpty]: Start isEmpty. Operand 5090 states and 6584 transitions. [2020-10-13 13:54:10,614 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 179 [2020-10-13 13:54:10,614 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 13:54:10,614 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 13:54:10,615 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-10-13 13:54:10,615 INFO L427 AbstractCegarLoop]: === Iteration 22 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 13:54:10,615 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 13:54:10,615 INFO L82 PathProgramCache]: Analyzing trace with hash -1875839197, now seen corresponding path program 1 times [2020-10-13 13:54:10,615 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 13:54:10,615 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [83807967] [2020-10-13 13:54:10,615 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 13:54:10,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 13:54:10,686 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:54:10,747 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:54:10,791 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:54:11,140 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:54:12,070 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:54:12,256 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:54:13,059 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:54:13,382 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:54:15,666 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 13:54:15,667 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 184 [2020-10-13 13:54:15,667 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-13 13:54:15,667 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5014 [2020-10-13 13:54:15,667 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 13:54:15,667 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-13 13:54:15,667 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 49 [2020-10-13 13:54:15,668 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 131 [2020-10-13 13:54:15,668 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 13:54:15,937 WARN L193 SmtUtils]: Spent 195.00 ms on a formula simplification that was a NOOP. DAG size: 172 [2020-10-13 13:54:15,938 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 13:54:15,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 13:54:15,943 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:54:15,950 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 13:54:15,950 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 13:54:15,950 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 13:54:15,950 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-13 13:54:15,950 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 13:54:15,951 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 13:54:15,951 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 13:54:15,951 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 13:54:15,951 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 13:54:15,981 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 13:54:15,981 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [83807967] [2020-10-13 13:54:15,982 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 13:54:15,982 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-13 13:54:15,982 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1059210535] [2020-10-13 13:54:15,982 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-13 13:54:15,982 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 13:54:15,982 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-13 13:54:15,983 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-13 13:54:15,983 INFO L87 Difference]: Start difference. First operand 5090 states and 6584 transitions. Second operand 6 states. [2020-10-13 13:54:16,234 WARN L193 SmtUtils]: Spent 212.00 ms on a formula simplification that was a NOOP. DAG size: 179 [2020-10-13 13:54:18,836 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 13:54:18,837 INFO L93 Difference]: Finished difference Result 9144 states and 12777 transitions. [2020-10-13 13:54:18,839 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-13 13:54:18,839 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 178 [2020-10-13 13:54:18,840 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 13:54:18,848 INFO L225 Difference]: With dead ends: 9144 [2020-10-13 13:54:18,849 INFO L226 Difference]: Without dead ends: 7888 [2020-10-13 13:54:18,853 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2020-10-13 13:54:18,860 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7888 states. [2020-10-13 13:54:19,739 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7888 to 7884. [2020-10-13 13:54:19,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7884 states. [2020-10-13 13:54:19,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7884 states to 7884 states and 10758 transitions. [2020-10-13 13:54:19,749 INFO L78 Accepts]: Start accepts. Automaton has 7884 states and 10758 transitions. Word has length 178 [2020-10-13 13:54:19,749 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 13:54:19,749 INFO L479 AbstractCegarLoop]: Abstraction has 7884 states and 10758 transitions. [2020-10-13 13:54:19,750 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-13 13:54:19,750 INFO L276 IsEmpty]: Start isEmpty. Operand 7884 states and 10758 transitions. [2020-10-13 13:54:19,755 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 179 [2020-10-13 13:54:19,755 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 13:54:19,756 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 13:54:19,756 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-10-13 13:54:19,756 INFO L427 AbstractCegarLoop]: === Iteration 23 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 13:54:19,756 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 13:54:19,757 INFO L82 PathProgramCache]: Analyzing trace with hash 1522532442, now seen corresponding path program 1 times [2020-10-13 13:54:19,757 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 13:54:19,757 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2056177663] [2020-10-13 13:54:19,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 13:54:19,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 13:54:19,815 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:54:19,930 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:54:20,240 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:54:20,635 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:54:20,822 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:54:24,437 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:54:24,606 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:54:24,790 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 13:54:24,791 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 184 [2020-10-13 13:54:24,791 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-13 13:54:24,791 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-13 13:54:24,791 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 13:54:24,791 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-13 13:54:24,791 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 47 [2020-10-13 13:54:24,791 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 131 [2020-10-13 13:54:24,791 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 13:54:25,023 WARN L193 SmtUtils]: Spent 180.00 ms on a formula simplification that was a NOOP. DAG size: 172 [2020-10-13 13:54:25,024 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 13:54:25,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 13:54:25,030 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:54:25,036 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 13:54:25,036 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 13:54:25,036 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 13:54:25,036 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-13 13:54:25,036 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 13:54:25,036 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 13:54:25,037 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 13:54:25,037 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 13:54:25,037 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 13:54:25,063 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 13:54:25,063 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2056177663] [2020-10-13 13:54:25,063 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 13:54:25,063 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-13 13:54:25,063 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2040771295] [2020-10-13 13:54:25,064 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-13 13:54:25,064 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 13:54:25,064 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-13 13:54:25,064 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-13 13:54:25,064 INFO L87 Difference]: Start difference. First operand 7884 states and 10758 transitions. Second operand 5 states. [2020-10-13 13:54:25,286 WARN L193 SmtUtils]: Spent 188.00 ms on a formula simplification that was a NOOP. DAG size: 173 [2020-10-13 13:54:28,499 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 13:54:28,500 INFO L93 Difference]: Finished difference Result 17153 states and 24454 transitions. [2020-10-13 13:54:28,500 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-13 13:54:28,501 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 178 [2020-10-13 13:54:28,501 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 13:54:28,513 INFO L225 Difference]: With dead ends: 17153 [2020-10-13 13:54:28,513 INFO L226 Difference]: Without dead ends: 13371 [2020-10-13 13:54:28,519 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-13 13:54:28,527 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13371 states. [2020-10-13 13:54:29,893 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13371 to 13369. [2020-10-13 13:54:29,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13369 states. [2020-10-13 13:54:29,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13369 states to 13369 states and 18584 transitions. [2020-10-13 13:54:29,914 INFO L78 Accepts]: Start accepts. Automaton has 13369 states and 18584 transitions. Word has length 178 [2020-10-13 13:54:29,914 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 13:54:29,914 INFO L479 AbstractCegarLoop]: Abstraction has 13369 states and 18584 transitions. [2020-10-13 13:54:29,914 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-13 13:54:29,914 INFO L276 IsEmpty]: Start isEmpty. Operand 13369 states and 18584 transitions. [2020-10-13 13:54:29,923 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 179 [2020-10-13 13:54:29,923 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 13:54:29,923 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 13:54:29,923 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-10-13 13:54:29,924 INFO L427 AbstractCegarLoop]: === Iteration 24 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 13:54:29,924 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 13:54:29,924 INFO L82 PathProgramCache]: Analyzing trace with hash -1959210634, now seen corresponding path program 1 times [2020-10-13 13:54:29,924 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 13:54:29,925 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1304302246] [2020-10-13 13:54:29,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 13:54:29,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 13:54:29,977 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:54:30,129 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:54:30,321 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:54:33,947 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:54:34,429 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:54:34,974 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 13:54:34,975 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 184 [2020-10-13 13:54:34,975 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-13 13:54:34,975 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5021 [2020-10-13 13:54:34,975 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 13:54:34,975 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 13:54:34,975 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 45 [2020-10-13 13:54:34,975 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 119 [2020-10-13 13:54:34,975 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 13:54:35,197 WARN L193 SmtUtils]: Spent 183.00 ms on a formula simplification that was a NOOP. DAG size: 172 [2020-10-13 13:54:35,198 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 13:54:35,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 13:54:35,204 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:54:35,209 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 13:54:35,210 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 13:54:35,210 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 13:54:35,210 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-13 13:54:35,210 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 13:54:35,210 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 13:54:35,210 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 13:54:35,210 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 13:54:35,211 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 13:54:35,234 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 13:54:35,235 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1304302246] [2020-10-13 13:54:35,235 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 13:54:35,235 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-13 13:54:35,235 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1022027494] [2020-10-13 13:54:35,235 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-13 13:54:35,235 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 13:54:35,236 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-13 13:54:35,236 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-13 13:54:35,236 INFO L87 Difference]: Start difference. First operand 13369 states and 18584 transitions. Second operand 4 states. [2020-10-13 13:54:35,453 WARN L193 SmtUtils]: Spent 194.00 ms on a formula simplification that was a NOOP. DAG size: 173 [2020-10-13 13:54:39,619 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 13:54:39,620 INFO L93 Difference]: Finished difference Result 31349 states and 45045 transitions. [2020-10-13 13:54:39,620 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-13 13:54:39,620 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 178 [2020-10-13 13:54:39,621 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 13:54:39,656 INFO L225 Difference]: With dead ends: 31349 [2020-10-13 13:54:39,656 INFO L226 Difference]: Without dead ends: 23251 [2020-10-13 13:54:39,674 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-13 13:54:39,691 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23251 states. [2020-10-13 13:54:42,311 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23251 to 23249. [2020-10-13 13:54:42,311 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23249 states. [2020-10-13 13:54:42,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23249 states to 23249 states and 32663 transitions. [2020-10-13 13:54:42,341 INFO L78 Accepts]: Start accepts. Automaton has 23249 states and 32663 transitions. Word has length 178 [2020-10-13 13:54:42,341 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 13:54:42,341 INFO L479 AbstractCegarLoop]: Abstraction has 23249 states and 32663 transitions. [2020-10-13 13:54:42,341 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-13 13:54:42,341 INFO L276 IsEmpty]: Start isEmpty. Operand 23249 states and 32663 transitions. [2020-10-13 13:54:42,348 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 179 [2020-10-13 13:54:42,349 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 13:54:42,349 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 13:54:42,349 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-10-13 13:54:42,349 INFO L427 AbstractCegarLoop]: === Iteration 25 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 13:54:42,349 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 13:54:42,349 INFO L82 PathProgramCache]: Analyzing trace with hash 675313758, now seen corresponding path program 1 times [2020-10-13 13:54:42,349 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 13:54:42,350 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [128997725] [2020-10-13 13:54:42,350 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 13:54:42,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 13:54:42,427 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:54:43,045 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:54:43,713 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:54:44,128 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:54:44,474 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:54:47,411 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 13:54:47,412 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 184 [2020-10-13 13:54:47,412 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-13 13:54:47,412 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5018 [2020-10-13 13:54:47,412 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 13:54:47,412 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-13 13:54:47,412 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 71 [2020-10-13 13:54:47,412 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 90 [2020-10-13 13:54:47,413 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 13:54:47,950 WARN L193 SmtUtils]: Spent 186.00 ms on a formula simplification that was a NOOP. DAG size: 172 [2020-10-13 13:54:47,951 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 13:54:47,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 13:54:47,959 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:54:47,963 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 13:54:47,963 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 13:54:47,963 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 13:54:47,964 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-13 13:54:47,964 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 13:54:47,964 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 13:54:47,964 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 13:54:47,964 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 13:54:47,964 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 13:54:48,009 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 13:54:48,010 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [128997725] [2020-10-13 13:54:48,010 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 13:54:48,010 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2020-10-13 13:54:48,010 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [553597751] [2020-10-13 13:54:48,011 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-13 13:54:48,011 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 13:54:48,011 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-13 13:54:48,011 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=111, Unknown=0, NotChecked=0, Total=132 [2020-10-13 13:54:48,011 INFO L87 Difference]: Start difference. First operand 23249 states and 32663 transitions. Second operand 12 states. [2020-10-13 13:54:48,598 WARN L193 SmtUtils]: Spent 495.00 ms on a formula simplification. DAG size of input: 191 DAG size of output: 189