/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --rcfgbuilder.size.of.a.code.block SequenceOfStatements --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=BIGGEST --traceabstraction.additional.smt.options log-additional-information=true --traceabstraction.additional.smt.options unknown-allowed=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/array-fpi/sina3.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-adbd35c [2020-10-12 10:15:35,218 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-12 10:15:35,222 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-12 10:15:35,269 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-12 10:15:35,269 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-12 10:15:35,281 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-12 10:15:35,283 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-12 10:15:35,287 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-12 10:15:35,290 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-12 10:15:35,294 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-12 10:15:35,295 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-12 10:15:35,296 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-12 10:15:35,297 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-12 10:15:35,300 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-12 10:15:35,303 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-12 10:15:35,305 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-12 10:15:35,307 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-12 10:15:35,308 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-12 10:15:35,310 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-12 10:15:35,320 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-12 10:15:35,322 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-12 10:15:35,323 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-12 10:15:35,324 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-12 10:15:35,325 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-12 10:15:35,328 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-12 10:15:35,328 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-12 10:15:35,328 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-12 10:15:35,331 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-12 10:15:35,332 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-12 10:15:35,334 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-12 10:15:35,334 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-12 10:15:35,335 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-12 10:15:35,336 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-12 10:15:35,336 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-12 10:15:35,338 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-12 10:15:35,338 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-12 10:15:35,339 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-12 10:15:35,339 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-12 10:15:35,339 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-12 10:15:35,340 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-12 10:15:35,342 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-12 10:15:35,343 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-12 10:15:35,389 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-12 10:15:35,389 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-12 10:15:35,392 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-12 10:15:35,392 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-12 10:15:35,392 INFO L138 SettingsManager]: * Use SBE=true [2020-10-12 10:15:35,393 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-12 10:15:35,393 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-12 10:15:35,393 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-12 10:15:35,394 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-12 10:15:35,394 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-12 10:15:35,395 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-12 10:15:35,395 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-12 10:15:35,396 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-12 10:15:35,396 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-12 10:15:35,396 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-12 10:15:35,397 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-12 10:15:35,397 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-12 10:15:35,397 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-12 10:15:35,397 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-12 10:15:35,397 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-12 10:15:35,398 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-12 10:15:35,398 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-12 10:15:35,398 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-12 10:15:35,398 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-12 10:15:35,399 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-12 10:15:35,399 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-12 10:15:35,399 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-12 10:15:35,399 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-12 10:15:35,399 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-12 10:15:35,400 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=BIGGEST;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=BIGGEST;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=BIGGEST;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=BIGGEST;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=BIGGEST;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=BIGGEST;log-additional-information=true;unknown-allowed=true; [2020-10-12 10:15:35,740 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-12 10:15:35,753 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-12 10:15:35,757 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-12 10:15:35,759 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-12 10:15:35,759 INFO L275 PluginConnector]: CDTParser initialized [2020-10-12 10:15:35,760 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-fpi/sina3.c [2020-10-12 10:15:35,826 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/e90dec5b8/529d2015a64e4a41b5b7634ffaf53a9d/FLAG8f99e7aa0 [2020-10-12 10:15:36,326 INFO L306 CDTParser]: Found 1 translation units. [2020-10-12 10:15:36,327 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/array-fpi/sina3.c [2020-10-12 10:15:36,336 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/e90dec5b8/529d2015a64e4a41b5b7634ffaf53a9d/FLAG8f99e7aa0 [2020-10-12 10:15:36,705 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/e90dec5b8/529d2015a64e4a41b5b7634ffaf53a9d [2020-10-12 10:15:36,714 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-12 10:15:36,716 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-12 10:15:36,718 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-12 10:15:36,718 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-12 10:15:36,722 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-12 10:15:36,724 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.10 10:15:36" (1/1) ... [2020-10-12 10:15:36,727 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4f798212 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 10:15:36, skipping insertion in model container [2020-10-12 10:15:36,727 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.10 10:15:36" (1/1) ... [2020-10-12 10:15:36,737 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-12 10:15:36,759 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-12 10:15:36,979 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-12 10:15:36,988 INFO L203 MainTranslator]: Completed pre-run [2020-10-12 10:15:37,013 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-12 10:15:37,115 INFO L208 MainTranslator]: Completed translation [2020-10-12 10:15:37,117 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 10:15:37 WrapperNode [2020-10-12 10:15:37,117 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-12 10:15:37,117 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-12 10:15:37,117 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-12 10:15:37,117 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-12 10:15:37,129 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 10:15:37" (1/1) ... [2020-10-12 10:15:37,129 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 10:15:37" (1/1) ... [2020-10-12 10:15:37,137 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 10:15:37" (1/1) ... [2020-10-12 10:15:37,138 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 10:15:37" (1/1) ... [2020-10-12 10:15:37,147 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 10:15:37" (1/1) ... [2020-10-12 10:15:37,154 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 10:15:37" (1/1) ... [2020-10-12 10:15:37,156 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 10:15:37" (1/1) ... [2020-10-12 10:15:37,159 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-12 10:15:37,159 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-12 10:15:37,159 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-12 10:15:37,160 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-12 10:15:37,161 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 10:15:37" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-12 10:15:37,220 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-12 10:15:37,220 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-12 10:15:37,220 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-10-12 10:15:37,221 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-12 10:15:37,221 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-12 10:15:37,221 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-10-12 10:15:37,221 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-12 10:15:37,221 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-10-12 10:15:37,221 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-12 10:15:37,221 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-12 10:15:37,222 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-10-12 10:15:37,222 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-12 10:15:37,222 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-12 10:15:37,222 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-10-12 10:15:37,222 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-12 10:15:37,222 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-12 10:15:37,223 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-12 10:15:37,223 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-12 10:15:37,223 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-12 10:15:37,548 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-12 10:15:37,548 INFO L295 CfgBuilder]: Removed 5 assume(true) statements. [2020-10-12 10:15:37,553 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.10 10:15:37 BoogieIcfgContainer [2020-10-12 10:15:37,557 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-12 10:15:37,559 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-12 10:15:37,559 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-12 10:15:37,567 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-12 10:15:37,567 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.10 10:15:36" (1/3) ... [2020-10-12 10:15:37,571 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6a979039 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.10 10:15:37, skipping insertion in model container [2020-10-12 10:15:37,572 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 10:15:37" (2/3) ... [2020-10-12 10:15:37,572 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6a979039 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.10 10:15:37, skipping insertion in model container [2020-10-12 10:15:37,572 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.10 10:15:37" (3/3) ... [2020-10-12 10:15:37,577 INFO L109 eAbstractionObserver]: Analyzing ICFG sina3.c [2020-10-12 10:15:37,600 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-12 10:15:37,620 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-12 10:15:37,638 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-12 10:15:37,657 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-10-12 10:15:37,657 INFO L376 AbstractCegarLoop]: Hoare is true [2020-10-12 10:15:37,658 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-12 10:15:37,658 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-12 10:15:37,658 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-12 10:15:37,658 INFO L380 AbstractCegarLoop]: Difference is false [2020-10-12 10:15:37,658 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-12 10:15:37,659 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-12 10:15:37,677 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states. [2020-10-12 10:15:37,684 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-12 10:15:37,685 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 10:15:37,686 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 10:15:37,686 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 10:15:37,691 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 10:15:37,692 INFO L82 PathProgramCache]: Analyzing trace with hash -173101897, now seen corresponding path program 1 times [2020-10-12 10:15:37,699 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 10:15:37,699 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [291071637] [2020-10-12 10:15:37,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 10:15:37,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:15:37,844 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:15:37,892 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:15:37,936 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:15:38,012 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:15:38,156 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:15:38,381 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:15:38,419 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:15:38,459 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:15:39,029 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:15:39,029 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 36 [2020-10-12 10:15:39,029 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-12 10:15:39,030 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1208 [2020-10-12 10:15:39,032 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:15:39,033 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-12 10:15:39,033 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-12 10:15:39,033 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-12 10:15:39,034 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-12 10:15:39,119 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 10:15:39,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:15:39,123 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:15:39,126 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:15:39,126 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 10:15:39,126 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:15:39,126 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-12 10:15:39,127 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:15:39,127 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:15:39,127 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:15:39,127 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:15:39,128 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:15:39,132 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-12 10:15:39,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:15:39,134 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:15:39,135 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:15:39,137 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:15:39,137 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:15:39,137 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 10:15:39,137 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 10:15:39,138 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:15:39,138 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:15:39,138 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:15:39,138 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:15:39,139 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 10:15:39,146 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 10:15:39,147 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [291071637] [2020-10-12 10:15:39,149 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 10:15:39,150 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-12 10:15:39,150 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1843177160] [2020-10-12 10:15:39,157 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-12 10:15:39,157 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 10:15:39,172 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-12 10:15:39,173 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-12 10:15:39,176 INFO L87 Difference]: Start difference. First operand 40 states. Second operand 6 states. [2020-10-12 10:15:39,456 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 10:15:39,457 INFO L93 Difference]: Finished difference Result 103 states and 145 transitions. [2020-10-12 10:15:39,458 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-12 10:15:39,459 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 26 [2020-10-12 10:15:39,460 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 10:15:39,471 INFO L225 Difference]: With dead ends: 103 [2020-10-12 10:15:39,471 INFO L226 Difference]: Without dead ends: 47 [2020-10-12 10:15:39,476 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2020-10-12 10:15:39,496 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2020-10-12 10:15:39,525 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 39. [2020-10-12 10:15:39,527 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2020-10-12 10:15:39,530 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 43 transitions. [2020-10-12 10:15:39,532 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 43 transitions. Word has length 26 [2020-10-12 10:15:39,532 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 10:15:39,532 INFO L479 AbstractCegarLoop]: Abstraction has 39 states and 43 transitions. [2020-10-12 10:15:39,533 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-12 10:15:39,533 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 43 transitions. [2020-10-12 10:15:39,534 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-10-12 10:15:39,535 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 10:15:39,535 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] [2020-10-12 10:15:39,535 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-12 10:15:39,536 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 10:15:39,536 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 10:15:39,536 INFO L82 PathProgramCache]: Analyzing trace with hash -260192085, now seen corresponding path program 1 times [2020-10-12 10:15:39,537 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 10:15:39,537 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [660921754] [2020-10-12 10:15:39,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 10:15:39,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:15:39,606 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:15:39,919 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:15:40,219 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:15:40,539 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:15:40,838 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:15:41,217 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:15:41,477 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:15:42,444 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:15:42,986 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:15:44,596 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:15:44,597 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 44 [2020-10-12 10:15:44,597 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-12 10:15:44,597 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5026 [2020-10-12 10:15:44,598 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:15:44,598 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-12 10:15:44,599 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-12 10:15:44,599 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-10-12 10:15:44,599 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 10:15:45,263 WARN L193 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 37 [2020-10-12 10:15:45,539 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 33 [2020-10-12 10:15:45,717 WARN L193 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 40 [2020-10-12 10:15:46,190 WARN L193 SmtUtils]: Spent 176.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 57 [2020-10-12 10:15:46,424 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 10:15:46,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:15:46,427 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:15:46,431 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:15:46,431 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 10:15:46,431 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:15:46,432 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-12 10:15:46,433 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:15:46,433 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:15:46,433 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:15:46,433 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:15:46,434 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 10:15:46,436 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-12 10:15:46,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:15:46,439 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:15:46,441 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:15:46,441 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:15:46,442 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:15:46,442 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-12 10:15:46,442 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:15:46,443 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:15:46,443 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:15:46,443 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:15:46,443 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 10:15:46,459 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 10:15:46,460 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [660921754] [2020-10-12 10:15:46,460 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 10:15:46,460 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-10-12 10:15:46,461 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [431248250] [2020-10-12 10:15:46,463 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-12 10:15:46,463 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 10:15:46,464 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-12 10:15:46,465 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=302, Unknown=0, NotChecked=0, Total=342 [2020-10-12 10:15:46,465 INFO L87 Difference]: Start difference. First operand 39 states and 43 transitions. Second operand 19 states. [2020-10-12 10:15:47,478 WARN L193 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 62 [2020-10-12 10:15:47,771 WARN L193 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 60 [2020-10-12 10:15:48,162 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 10:15:48,162 INFO L93 Difference]: Finished difference Result 89 states and 102 transitions. [2020-10-12 10:15:48,163 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-12 10:15:48,163 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 34 [2020-10-12 10:15:48,164 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 10:15:48,165 INFO L225 Difference]: With dead ends: 89 [2020-10-12 10:15:48,166 INFO L226 Difference]: Without dead ends: 68 [2020-10-12 10:15:48,168 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 133 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=120, Invalid=810, Unknown=0, NotChecked=0, Total=930 [2020-10-12 10:15:48,169 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2020-10-12 10:15:48,188 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 60. [2020-10-12 10:15:48,188 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2020-10-12 10:15:48,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 67 transitions. [2020-10-12 10:15:48,197 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 67 transitions. Word has length 34 [2020-10-12 10:15:48,198 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 10:15:48,198 INFO L479 AbstractCegarLoop]: Abstraction has 60 states and 67 transitions. [2020-10-12 10:15:48,199 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-12 10:15:48,200 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 67 transitions. [2020-10-12 10:15:48,202 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-10-12 10:15:48,202 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 10:15:48,202 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 10:15:48,203 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-12 10:15:48,203 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 10:15:48,203 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 10:15:48,203 INFO L82 PathProgramCache]: Analyzing trace with hash -997101975, now seen corresponding path program 2 times [2020-10-12 10:15:48,204 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 10:15:48,204 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1980067459] [2020-10-12 10:15:48,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 10:15:48,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:15:48,235 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:15:48,258 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:15:48,273 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:15:49,898 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:15:50,188 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:15:50,467 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:15:50,982 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:15:51,060 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:15:51,401 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:15:52,032 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:15:52,334 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:15:52,530 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:15:52,854 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:15:53,228 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:15:53,228 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 46 [2020-10-12 10:15:53,229 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 13 [2020-10-12 10:15:53,229 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-12 10:15:53,229 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:15:53,229 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 19 [2020-10-12 10:15:53,229 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-12 10:15:53,230 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 25 [2020-10-12 10:15:53,230 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:15:53,540 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 47 [2020-10-12 10:15:53,669 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 37 [2020-10-12 10:15:54,168 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 44 [2020-10-12 10:15:54,305 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 40 [2020-10-12 10:15:54,802 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 10:15:54,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:15:54,805 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:15:54,807 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:15:54,807 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 10:15:54,808 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:15:54,808 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 10:15:54,808 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:15:54,809 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:15:54,812 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:15:54,812 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:15:54,812 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-10-12 10:15:54,815 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-12 10:15:54,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:15:54,817 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:15:54,818 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:15:54,819 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:15:54,819 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:15:54,819 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 10:15:54,819 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:15:54,819 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:15:54,820 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:15:54,820 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:15:54,820 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:15:54,835 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-12 10:15:54,836 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1980067459] [2020-10-12 10:15:54,836 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 10:15:54,836 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-10-12 10:15:54,837 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [842314081] [2020-10-12 10:15:54,838 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-12 10:15:54,838 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 10:15:54,838 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-12 10:15:54,839 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=326, Unknown=0, NotChecked=0, Total=380 [2020-10-12 10:15:54,839 INFO L87 Difference]: Start difference. First operand 60 states and 67 transitions. Second operand 20 states. [2020-10-12 10:15:56,144 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 10:15:56,144 INFO L93 Difference]: Finished difference Result 79 states and 88 transitions. [2020-10-12 10:15:56,145 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-12 10:15:56,145 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 36 [2020-10-12 10:15:56,146 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 10:15:56,149 INFO L225 Difference]: With dead ends: 79 [2020-10-12 10:15:56,149 INFO L226 Difference]: Without dead ends: 77 [2020-10-12 10:15:56,150 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 218 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=164, Invalid=892, Unknown=0, NotChecked=0, Total=1056 [2020-10-12 10:15:56,151 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2020-10-12 10:15:56,160 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 60. [2020-10-12 10:15:56,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2020-10-12 10:15:56,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 67 transitions. [2020-10-12 10:15:56,161 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 67 transitions. Word has length 36 [2020-10-12 10:15:56,162 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 10:15:56,162 INFO L479 AbstractCegarLoop]: Abstraction has 60 states and 67 transitions. [2020-10-12 10:15:56,162 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-12 10:15:56,162 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 67 transitions. [2020-10-12 10:15:56,163 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-10-12 10:15:56,163 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 10:15:56,164 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 10:15:56,164 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-12 10:15:56,164 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 10:15:56,164 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 10:15:56,165 INFO L82 PathProgramCache]: Analyzing trace with hash -1448653143, now seen corresponding path program 3 times [2020-10-12 10:15:56,165 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 10:15:56,165 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1397655916] [2020-10-12 10:15:56,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 10:15:56,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:15:56,179 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:15:56,194 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:15:56,215 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:15:57,945 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:15:57,945 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 46 [2020-10-12 10:15:57,946 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-12 10:15:57,946 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1769 [2020-10-12 10:15:57,946 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:15:57,946 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-12 10:15:57,946 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-12 10:15:57,946 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-12 10:15:57,947 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:15:57,991 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 10:15:57,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:15:57,993 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:15:57,994 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:15:57,995 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 10:15:57,995 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:15:57,995 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 10:15:57,995 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:15:57,996 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:15:57,996 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:15:57,996 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:15:57,996 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:15:57,998 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-12 10:15:57,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:15:57,999 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:15:58,000 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:15:58,000 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:15:58,000 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:15:58,001 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 10:15:58,001 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:15:58,001 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:15:58,001 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:15:58,001 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:15:58,002 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:15:58,005 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-12 10:15:58,005 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1397655916] [2020-10-12 10:15:58,006 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 10:15:58,006 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-12 10:15:58,006 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [476276007] [2020-10-12 10:15:58,007 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-12 10:15:58,007 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 10:15:58,007 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-12 10:15:58,007 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2020-10-12 10:15:58,008 INFO L87 Difference]: Start difference. First operand 60 states and 67 transitions. Second operand 8 states. [2020-10-12 10:15:58,342 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 10:15:58,343 INFO L93 Difference]: Finished difference Result 124 states and 141 transitions. [2020-10-12 10:15:58,344 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-12 10:15:58,344 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 36 [2020-10-12 10:15:58,344 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 10:15:58,346 INFO L225 Difference]: With dead ends: 124 [2020-10-12 10:15:58,346 INFO L226 Difference]: Without dead ends: 74 [2020-10-12 10:15:58,348 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2020-10-12 10:15:58,349 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2020-10-12 10:15:58,363 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 60. [2020-10-12 10:15:58,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2020-10-12 10:15:58,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 67 transitions. [2020-10-12 10:15:58,367 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 67 transitions. Word has length 36 [2020-10-12 10:15:58,367 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 10:15:58,367 INFO L479 AbstractCegarLoop]: Abstraction has 60 states and 67 transitions. [2020-10-12 10:15:58,368 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-12 10:15:58,368 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 67 transitions. [2020-10-12 10:15:58,369 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-10-12 10:15:58,369 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 10:15:58,370 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 10:15:58,370 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-12 10:15:58,370 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 10:15:58,371 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 10:15:58,371 INFO L82 PathProgramCache]: Analyzing trace with hash 1185197865, now seen corresponding path program 4 times [2020-10-12 10:15:58,371 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 10:15:58,372 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [715032583] [2020-10-12 10:15:58,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 10:15:58,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:15:58,399 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:15:58,420 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:15:58,437 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:15:59,016 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:15:59,240 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:15:59,438 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:15:59,640 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:15:59,807 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:15:59,953 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:16:00,113 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:16:00,261 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:16:00,438 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:16:00,856 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:16:01,368 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:16:01,429 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:16:01,614 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:16:01,615 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 46 [2020-10-12 10:16:01,615 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 15 [2020-10-12 10:16:01,615 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3220 [2020-10-12 10:16:01,615 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:16:01,615 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-12 10:16:01,616 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-12 10:16:01,616 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 25 [2020-10-12 10:16:01,616 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:16:01,946 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 49 [2020-10-12 10:16:02,064 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 44 [2020-10-12 10:16:02,867 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 10:16:02,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:16:02,869 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:16:02,870 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:16:02,871 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 10:16:02,871 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:16:02,871 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 10:16:02,871 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:16:02,871 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:16:02,871 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:16:02,871 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:16:02,872 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:16:02,873 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-12 10:16:02,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:16:02,874 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:16:02,874 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:16:02,875 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:16:02,875 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:16:02,875 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 10:16:02,875 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:16:02,875 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:16:02,876 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:16:02,876 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:16:02,876 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:16:02,887 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-12 10:16:02,887 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [715032583] [2020-10-12 10:16:02,888 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 10:16:02,888 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-10-12 10:16:02,888 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1503570499] [2020-10-12 10:16:02,889 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-12 10:16:02,889 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 10:16:02,889 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-12 10:16:02,889 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=295, Unknown=0, NotChecked=0, Total=342 [2020-10-12 10:16:02,890 INFO L87 Difference]: Start difference. First operand 60 states and 67 transitions. Second operand 19 states. [2020-10-12 10:16:04,191 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 10:16:04,191 INFO L93 Difference]: Finished difference Result 72 states and 78 transitions. [2020-10-12 10:16:04,192 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-12 10:16:04,192 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 36 [2020-10-12 10:16:04,193 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 10:16:04,194 INFO L225 Difference]: With dead ends: 72 [2020-10-12 10:16:04,194 INFO L226 Difference]: Without dead ends: 57 [2020-10-12 10:16:04,195 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 148 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=130, Invalid=800, Unknown=0, NotChecked=0, Total=930 [2020-10-12 10:16:04,196 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2020-10-12 10:16:04,202 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 56. [2020-10-12 10:16:04,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-10-12 10:16:04,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 62 transitions. [2020-10-12 10:16:04,203 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 62 transitions. Word has length 36 [2020-10-12 10:16:04,203 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 10:16:04,204 INFO L479 AbstractCegarLoop]: Abstraction has 56 states and 62 transitions. [2020-10-12 10:16:04,204 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-12 10:16:04,204 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 62 transitions. [2020-10-12 10:16:04,205 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-10-12 10:16:04,205 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 10:16:04,205 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 10:16:04,205 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-12 10:16:04,206 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 10:16:04,206 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 10:16:04,206 INFO L82 PathProgramCache]: Analyzing trace with hash -1134932505, now seen corresponding path program 5 times [2020-10-12 10:16:04,206 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 10:16:04,207 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1502886611] [2020-10-12 10:16:04,207 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 10:16:04,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:16:04,220 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:16:04,234 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:16:04,256 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:16:04,385 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:16:04,789 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:16:04,864 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:16:05,084 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:16:05,330 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:16:05,504 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:16:05,698 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:16:05,758 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:16:05,918 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:16:06,045 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:16:06,046 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 48 [2020-10-12 10:16:06,046 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 12 [2020-10-12 10:16:06,046 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1830 [2020-10-12 10:16:06,046 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:16:06,047 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 19 [2020-10-12 10:16:06,047 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-12 10:16:06,047 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 27 [2020-10-12 10:16:06,047 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:16:06,481 WARN L193 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 57 [2020-10-12 10:16:07,307 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 10:16:07,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:16:07,311 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:16:07,312 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:16:07,313 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 10:16:07,313 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:16:07,313 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 10:16:07,313 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:16:07,314 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:16:07,314 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:16:07,314 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:16:07,314 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:16:07,318 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-12 10:16:07,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:16:07,320 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:16:07,321 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:16:07,321 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:16:07,321 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:16:07,322 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 10:16:07,322 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:16:07,322 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:16:07,322 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:16:07,323 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:16:07,323 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:16:07,339 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-12 10:16:07,339 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1502886611] [2020-10-12 10:16:07,340 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 10:16:07,340 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-10-12 10:16:07,341 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1823269925] [2020-10-12 10:16:07,341 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-12 10:16:07,341 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 10:16:07,342 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-12 10:16:07,342 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=302, Unknown=0, NotChecked=0, Total=342 [2020-10-12 10:16:07,342 INFO L87 Difference]: Start difference. First operand 56 states and 62 transitions. Second operand 19 states. [2020-10-12 10:16:08,007 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 43 [2020-10-12 10:16:08,163 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 42 [2020-10-12 10:16:08,312 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 48 [2020-10-12 10:16:08,498 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 51 [2020-10-12 10:16:09,504 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 10:16:09,504 INFO L93 Difference]: Finished difference Result 64 states and 69 transitions. [2020-10-12 10:16:09,505 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-12 10:16:09,505 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 38 [2020-10-12 10:16:09,506 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 10:16:09,507 INFO L225 Difference]: With dead ends: 64 [2020-10-12 10:16:09,507 INFO L226 Difference]: Without dead ends: 53 [2020-10-12 10:16:09,508 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 139 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=142, Invalid=1048, Unknown=0, NotChecked=0, Total=1190 [2020-10-12 10:16:09,509 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2020-10-12 10:16:09,514 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 52. [2020-10-12 10:16:09,515 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-10-12 10:16:09,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 57 transitions. [2020-10-12 10:16:09,515 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 57 transitions. Word has length 38 [2020-10-12 10:16:09,516 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 10:16:09,516 INFO L479 AbstractCegarLoop]: Abstraction has 52 states and 57 transitions. [2020-10-12 10:16:09,516 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-12 10:16:09,516 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 57 transitions. [2020-10-12 10:16:09,517 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-10-12 10:16:09,517 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 10:16:09,517 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 10:16:09,518 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-12 10:16:09,518 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 10:16:09,518 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 10:16:09,518 INFO L82 PathProgramCache]: Analyzing trace with hash -260606747, now seen corresponding path program 6 times [2020-10-12 10:16:09,518 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 10:16:09,519 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2076914187] [2020-10-12 10:16:09,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 10:16:09,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:16:09,532 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:16:09,559 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:16:09,565 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:16:09,791 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:16:09,944 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:16:10,190 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:16:10,615 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:16:10,839 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:16:11,418 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:16:11,750 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:16:12,028 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:16:12,195 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:16:12,580 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:16:12,635 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:16:12,702 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:16:13,853 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:16:14,529 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:16:14,529 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 50 [2020-10-12 10:16:14,529 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 16 [2020-10-12 10:16:14,529 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-12 10:16:14,530 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:16:14,530 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 23 [2020-10-12 10:16:14,530 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-12 10:16:14,530 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 29 [2020-10-12 10:16:14,530 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:16:14,920 WARN L193 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 42 [2020-10-12 10:16:15,358 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 51 [2020-10-12 10:16:15,923 WARN L193 SmtUtils]: Spent 193.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 54 [2020-10-12 10:16:16,096 WARN L193 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 50 [2020-10-12 10:16:16,238 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 40 [2020-10-12 10:16:16,637 WARN L193 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 41 [2020-10-12 10:16:16,968 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 10:16:16,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:16:16,971 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:16:16,972 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:16:16,972 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 10:16:16,972 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:16:16,972 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 10:16:16,973 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:16:16,973 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:16:16,973 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:16:16,973 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:16:16,973 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:16:16,974 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-12 10:16:16,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:16:16,975 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:16:16,976 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:16:16,976 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:16:16,976 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:16:16,976 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 10:16:16,976 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:16:16,976 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:16:16,976 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:16:16,976 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:16:16,977 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:16:16,988 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 10:16:16,989 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2076914187] [2020-10-12 10:16:16,989 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 10:16:16,989 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2020-10-12 10:16:16,990 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [57639246] [2020-10-12 10:16:16,990 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-12 10:16:16,990 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 10:16:16,990 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-12 10:16:16,991 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=527, Unknown=0, NotChecked=0, Total=600 [2020-10-12 10:16:16,991 INFO L87 Difference]: Start difference. First operand 52 states and 57 transitions. Second operand 25 states. [2020-10-12 10:16:17,446 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 48 [2020-10-12 10:16:17,852 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 42 [2020-10-12 10:16:18,184 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 44 [2020-10-12 10:16:18,495 WARN L193 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 45 [2020-10-12 10:16:19,171 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 43 [2020-10-12 10:16:20,307 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 10:16:20,308 INFO L93 Difference]: Finished difference Result 134 states and 156 transitions. [2020-10-12 10:16:20,308 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-10-12 10:16:20,308 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 40 [2020-10-12 10:16:20,309 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 10:16:20,310 INFO L225 Difference]: With dead ends: 134 [2020-10-12 10:16:20,310 INFO L226 Difference]: Without dead ends: 106 [2020-10-12 10:16:20,311 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 545 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=302, Invalid=1954, Unknown=0, NotChecked=0, Total=2256 [2020-10-12 10:16:20,312 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2020-10-12 10:16:20,324 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 89. [2020-10-12 10:16:20,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2020-10-12 10:16:20,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 100 transitions. [2020-10-12 10:16:20,326 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 100 transitions. Word has length 40 [2020-10-12 10:16:20,327 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 10:16:20,327 INFO L479 AbstractCegarLoop]: Abstraction has 89 states and 100 transitions. [2020-10-12 10:16:20,327 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-12 10:16:20,327 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 100 transitions. [2020-10-12 10:16:20,328 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-10-12 10:16:20,328 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 10:16:20,328 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 10:16:20,329 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-12 10:16:20,329 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 10:16:20,329 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 10:16:20,329 INFO L82 PathProgramCache]: Analyzing trace with hash -1847143325, now seen corresponding path program 7 times [2020-10-12 10:16:20,329 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 10:16:20,330 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1413492686] [2020-10-12 10:16:20,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 10:16:20,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:16:20,344 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:16:20,359 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:16:20,370 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:16:20,388 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:16:20,564 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:16:20,591 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:16:25,340 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:16:25,340 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 52 [2020-10-12 10:16:25,341 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-12 10:16:25,341 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-12 10:16:25,341 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:16:25,341 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-12 10:16:25,341 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 26 [2020-10-12 10:16:25,341 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-12 10:16:25,342 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:16:25,408 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 10:16:25,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:16:25,410 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:16:25,411 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:16:25,411 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 10:16:25,411 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:16:25,412 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 10:16:25,412 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:16:25,412 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:16:25,412 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:16:25,412 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:16:25,412 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:16:25,413 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-12 10:16:25,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:16:25,414 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:16:25,414 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:16:25,415 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:16:25,415 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:16:25,415 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 10:16:25,415 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:16:25,415 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:16:25,415 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:16:25,415 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:16:25,415 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:16:25,417 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-10-12 10:16:25,418 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1413492686] [2020-10-12 10:16:25,418 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 10:16:25,418 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-12 10:16:25,419 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [271049510] [2020-10-12 10:16:25,419 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-12 10:16:25,419 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 10:16:25,419 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-12 10:16:25,420 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2020-10-12 10:16:25,420 INFO L87 Difference]: Start difference. First operand 89 states and 100 transitions. Second operand 10 states. [2020-10-12 10:16:25,859 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 10:16:25,860 INFO L93 Difference]: Finished difference Result 182 states and 208 transitions. [2020-10-12 10:16:25,860 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-12 10:16:25,861 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 42 [2020-10-12 10:16:25,861 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 10:16:25,863 INFO L225 Difference]: With dead ends: 182 [2020-10-12 10:16:25,863 INFO L226 Difference]: Without dead ends: 126 [2020-10-12 10:16:25,864 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=68, Invalid=172, Unknown=0, NotChecked=0, Total=240 [2020-10-12 10:16:25,865 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2020-10-12 10:16:25,878 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 108. [2020-10-12 10:16:25,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 108 states. [2020-10-12 10:16:25,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 119 transitions. [2020-10-12 10:16:25,879 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 119 transitions. Word has length 42 [2020-10-12 10:16:25,880 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 10:16:25,880 INFO L479 AbstractCegarLoop]: Abstraction has 108 states and 119 transitions. [2020-10-12 10:16:25,880 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-12 10:16:25,880 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 119 transitions. [2020-10-12 10:16:25,881 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-10-12 10:16:25,881 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 10:16:25,882 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 10:16:25,882 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-12 10:16:25,882 INFO L427 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 10:16:25,882 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 10:16:25,882 INFO L82 PathProgramCache]: Analyzing trace with hash 1957364963, now seen corresponding path program 8 times [2020-10-12 10:16:25,883 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 10:16:25,883 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1700300264] [2020-10-12 10:16:25,883 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 10:16:25,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:16:25,896 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:16:25,909 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:16:25,928 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:16:26,068 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:16:26,077 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:16:26,236 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:16:28,495 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:16:28,612 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:16:28,855 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:16:29,015 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:16:30,538 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:16:30,892 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:16:30,892 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 52 [2020-10-12 10:16:30,892 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 11 [2020-10-12 10:16:30,892 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-12 10:16:30,892 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:16:30,893 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 24 [2020-10-12 10:16:30,893 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-12 10:16:30,893 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 31 [2020-10-12 10:16:30,893 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:16:31,220 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 42 [2020-10-12 10:16:31,751 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 52 [2020-10-12 10:16:32,501 WARN L193 SmtUtils]: Spent 202.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 64 [2020-10-12 10:16:32,649 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 44 [2020-10-12 10:16:33,060 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 36 [2020-10-12 10:16:33,372 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 10:16:33,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:16:33,376 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:16:33,377 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:16:33,377 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 10:16:33,378 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:16:33,378 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 10:16:33,378 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:16:33,378 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:16:33,378 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:16:33,378 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:16:33,379 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:16:33,380 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-12 10:16:33,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:16:33,381 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:16:33,383 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:16:33,383 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:16:33,383 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:16:33,383 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 10:16:33,384 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:16:33,384 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:16:33,384 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:16:33,384 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:16:33,384 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:16:33,401 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-12 10:16:33,401 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1700300264] [2020-10-12 10:16:33,401 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 10:16:33,402 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2020-10-12 10:16:33,402 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1139060707] [2020-10-12 10:16:33,402 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-12 10:16:33,403 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 10:16:33,403 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-12 10:16:33,403 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=528, Unknown=0, NotChecked=0, Total=600 [2020-10-12 10:16:33,403 INFO L87 Difference]: Start difference. First operand 108 states and 119 transitions. Second operand 25 states. [2020-10-12 10:16:34,163 WARN L193 SmtUtils]: Spent 222.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 69 [2020-10-12 10:16:34,438 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 49 [2020-10-12 10:16:34,666 WARN L193 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 58 [2020-10-12 10:16:34,820 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 48 [2020-10-12 10:16:34,972 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 47 [2020-10-12 10:16:35,156 WARN L193 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 48 [2020-10-12 10:16:35,459 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 43 [2020-10-12 10:16:35,788 WARN L193 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 57 [2020-10-12 10:16:36,733 WARN L193 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 56 [2020-10-12 10:16:37,222 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 10:16:37,222 INFO L93 Difference]: Finished difference Result 120 states and 131 transitions. [2020-10-12 10:16:37,225 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-10-12 10:16:37,225 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 42 [2020-10-12 10:16:37,226 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 10:16:37,227 INFO L225 Difference]: With dead ends: 120 [2020-10-12 10:16:37,227 INFO L226 Difference]: Without dead ends: 113 [2020-10-12 10:16:37,228 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 568 ImplicationChecksByTransitivity, 5.3s TimeCoverageRelationStatistics Valid=335, Invalid=2215, Unknown=0, NotChecked=0, Total=2550 [2020-10-12 10:16:37,229 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2020-10-12 10:16:37,243 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 112. [2020-10-12 10:16:37,243 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 112 states. [2020-10-12 10:16:37,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 123 transitions. [2020-10-12 10:16:37,244 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 123 transitions. Word has length 42 [2020-10-12 10:16:37,244 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 10:16:37,244 INFO L479 AbstractCegarLoop]: Abstraction has 112 states and 123 transitions. [2020-10-12 10:16:37,244 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-12 10:16:37,244 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 123 transitions. [2020-10-12 10:16:37,246 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2020-10-12 10:16:37,246 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 10:16:37,246 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 10:16:37,246 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-12 10:16:37,246 INFO L427 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 10:16:37,247 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 10:16:37,247 INFO L82 PathProgramCache]: Analyzing trace with hash -228557663, now seen corresponding path program 9 times [2020-10-12 10:16:37,247 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 10:16:37,247 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [27819772] [2020-10-12 10:16:37,247 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 10:16:37,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:16:37,259 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:16:37,270 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:16:37,355 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:16:38,320 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:16:38,497 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:16:38,669 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:16:38,811 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:16:39,237 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:16:39,490 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:16:39,814 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:16:40,714 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:16:40,866 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:16:41,459 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:16:41,691 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:16:41,896 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:16:42,079 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:16:42,137 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:16:42,258 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:16:42,259 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 54 [2020-10-12 10:16:42,259 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 17 [2020-10-12 10:16:42,259 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-12 10:16:42,259 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:16:42,260 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 25 [2020-10-12 10:16:42,260 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-12 10:16:42,260 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 33 [2020-10-12 10:16:42,260 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:16:42,654 WARN L193 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 39 [2020-10-12 10:16:42,914 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 47 [2020-10-12 10:16:43,076 WARN L193 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 49 [2020-10-12 10:16:43,222 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 44 [2020-10-12 10:16:43,381 WARN L193 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 43 [2020-10-12 10:16:43,526 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 36 [2020-10-12 10:16:43,723 WARN L193 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 47 [2020-10-12 10:16:43,885 WARN L193 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 45 [2020-10-12 10:16:44,094 WARN L193 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 50 [2020-10-12 10:16:44,285 WARN L193 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 34 [2020-10-12 10:16:44,555 WARN L193 SmtUtils]: Spent 199.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 48 [2020-10-12 10:16:44,893 WARN L193 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 58 [2020-10-12 10:16:45,481 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 10:16:45,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:16:45,485 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:16:45,486 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:16:45,486 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 10:16:45,486 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:16:45,486 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 10:16:45,486 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:16:45,486 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:16:45,487 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:16:45,487 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:16:45,487 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:16:45,487 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-12 10:16:45,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:16:45,488 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:16:45,489 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:16:45,489 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:16:45,489 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:16:45,489 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 10:16:45,489 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:16:45,489 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:16:45,489 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:16:45,490 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:16:45,490 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:16:45,504 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 1 proven. 18 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-12 10:16:45,504 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [27819772] [2020-10-12 10:16:45,504 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 10:16:45,504 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2020-10-12 10:16:45,505 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1652836111] [2020-10-12 10:16:45,505 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-10-12 10:16:45,505 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 10:16:45,506 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-10-12 10:16:45,506 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=586, Unknown=0, NotChecked=0, Total=650 [2020-10-12 10:16:45,506 INFO L87 Difference]: Start difference. First operand 112 states and 123 transitions. Second operand 26 states. [2020-10-12 10:16:46,062 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 56 [2020-10-12 10:16:46,717 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 56 [2020-10-12 10:16:47,819 WARN L193 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 64 [2020-10-12 10:16:48,320 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 58 [2020-10-12 10:16:48,821 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 10:16:48,821 INFO L93 Difference]: Finished difference Result 136 states and 149 transitions. [2020-10-12 10:16:48,822 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-10-12 10:16:48,822 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 44 [2020-10-12 10:16:48,822 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 10:16:48,824 INFO L225 Difference]: With dead ends: 136 [2020-10-12 10:16:48,824 INFO L226 Difference]: Without dead ends: 129 [2020-10-12 10:16:48,826 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 393 ImplicationChecksByTransitivity, 5.2s TimeCoverageRelationStatistics Valid=229, Invalid=1933, Unknown=0, NotChecked=0, Total=2162 [2020-10-12 10:16:48,826 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2020-10-12 10:16:48,837 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 96. [2020-10-12 10:16:48,838 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96 states. [2020-10-12 10:16:48,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 106 transitions. [2020-10-12 10:16:48,839 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 106 transitions. Word has length 44 [2020-10-12 10:16:48,839 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 10:16:48,839 INFO L479 AbstractCegarLoop]: Abstraction has 96 states and 106 transitions. [2020-10-12 10:16:48,839 INFO L480 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-10-12 10:16:48,839 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 106 transitions. [2020-10-12 10:16:48,840 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-10-12 10:16:48,841 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 10:16:48,841 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 10:16:48,841 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-12 10:16:48,841 INFO L427 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 10:16:48,841 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 10:16:48,841 INFO L82 PathProgramCache]: Analyzing trace with hash -1491251809, now seen corresponding path program 10 times [2020-10-12 10:16:48,842 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 10:16:48,842 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [134579243] [2020-10-12 10:16:48,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 10:16:48,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:16:48,857 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:16:48,871 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:16:48,895 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:16:48,908 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:16:48,916 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:16:49,087 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:16:51,919 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:16:52,206 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:16:52,777 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:16:53,856 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:16:53,856 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 56 [2020-10-12 10:16:53,856 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-12 10:16:53,857 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-12 10:16:53,857 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:16:53,857 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 29 [2020-10-12 10:16:53,857 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-12 10:16:53,857 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 35 [2020-10-12 10:16:53,858 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:16:54,906 WARN L193 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 60 [2020-10-12 10:16:55,117 WARN L193 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 59 [2020-10-12 10:16:55,361 WARN L193 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 58 [2020-10-12 10:16:55,545 WARN L193 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 50 [2020-10-12 10:16:55,725 WARN L193 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 49 [2020-10-12 10:16:55,893 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 45 [2020-10-12 10:16:56,082 WARN L193 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 50 [2020-10-12 10:16:56,255 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 43 [2020-10-12 10:16:56,469 WARN L193 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 57 [2020-10-12 10:16:56,700 WARN L193 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 49 [2020-10-12 10:16:57,706 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 10:16:57,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:16:57,708 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:16:57,710 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:16:57,710 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 10:16:57,710 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:16:57,710 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 10:16:57,710 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:16:57,710 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:16:57,711 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:16:57,711 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:16:57,711 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:16:57,712 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-12 10:16:57,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:16:57,713 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:16:57,714 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:16:57,714 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:16:57,714 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:16:57,715 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 10:16:57,715 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:16:57,715 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:16:57,715 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:16:57,715 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:16:57,715 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:16:57,731 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 10:16:57,732 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [134579243] [2020-10-12 10:16:57,732 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 10:16:57,732 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30] total 30 [2020-10-12 10:16:57,732 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [209726731] [2020-10-12 10:16:57,733 INFO L459 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-10-12 10:16:57,733 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 10:16:57,733 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-10-12 10:16:57,733 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=799, Unknown=0, NotChecked=0, Total=870 [2020-10-12 10:16:57,734 INFO L87 Difference]: Start difference. First operand 96 states and 106 transitions. Second operand 30 states. [2020-10-12 10:16:58,534 WARN L193 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 139 DAG size of output: 41 [2020-10-12 10:16:58,822 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 51 [2020-10-12 10:16:59,094 WARN L193 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 69 [2020-10-12 10:16:59,387 WARN L193 SmtUtils]: Spent 200.00 ms on a formula simplification. DAG size of input: 135 DAG size of output: 64 [2020-10-12 10:16:59,745 WARN L193 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 58 [2020-10-12 10:16:59,931 WARN L193 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 124 DAG size of output: 40 [2020-10-12 10:17:00,183 WARN L193 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 112 DAG size of output: 60 [2020-10-12 10:17:00,493 WARN L193 SmtUtils]: Spent 243.00 ms on a formula simplification. DAG size of input: 137 DAG size of output: 47 [2020-10-12 10:17:00,952 WARN L193 SmtUtils]: Spent 357.00 ms on a formula simplification. DAG size of input: 108 DAG size of output: 87 [2020-10-12 10:17:01,215 WARN L193 SmtUtils]: Spent 201.00 ms on a formula simplification. DAG size of input: 127 DAG size of output: 53 [2020-10-12 10:17:01,576 WARN L193 SmtUtils]: Spent 260.00 ms on a formula simplification. DAG size of input: 128 DAG size of output: 75 [2020-10-12 10:17:01,916 WARN L193 SmtUtils]: Spent 233.00 ms on a formula simplification. DAG size of input: 133 DAG size of output: 55 [2020-10-12 10:17:02,295 WARN L193 SmtUtils]: Spent 215.00 ms on a formula simplification. DAG size of input: 139 DAG size of output: 61 [2020-10-12 10:17:02,606 WARN L193 SmtUtils]: Spent 203.00 ms on a formula simplification. DAG size of input: 142 DAG size of output: 52 [2020-10-12 10:17:02,861 WARN L193 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 131 DAG size of output: 48 [2020-10-12 10:17:03,159 WARN L193 SmtUtils]: Spent 185.00 ms on a formula simplification. DAG size of input: 131 DAG size of output: 45 [2020-10-12 10:17:03,376 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 112 DAG size of output: 45 [2020-10-12 10:17:03,622 WARN L193 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 105 DAG size of output: 49 [2020-10-12 10:17:03,866 WARN L193 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 122 DAG size of output: 45 [2020-10-12 10:17:04,098 WARN L193 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 61 [2020-10-12 10:17:04,319 WARN L193 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 106 DAG size of output: 44 [2020-10-12 10:17:05,447 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 10:17:05,448 INFO L93 Difference]: Finished difference Result 194 states and 219 transitions. [2020-10-12 10:17:05,448 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2020-10-12 10:17:05,448 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 46 [2020-10-12 10:17:05,449 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 10:17:05,450 INFO L225 Difference]: With dead ends: 194 [2020-10-12 10:17:05,450 INFO L226 Difference]: Without dead ends: 127 [2020-10-12 10:17:05,452 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 771 ImplicationChecksByTransitivity, 9.7s TimeCoverageRelationStatistics Valid=454, Invalid=3452, Unknown=0, NotChecked=0, Total=3906 [2020-10-12 10:17:05,452 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2020-10-12 10:17:05,466 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 124. [2020-10-12 10:17:05,467 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 124 states. [2020-10-12 10:17:05,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 138 transitions. [2020-10-12 10:17:05,468 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 138 transitions. Word has length 46 [2020-10-12 10:17:05,468 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 10:17:05,468 INFO L479 AbstractCegarLoop]: Abstraction has 124 states and 138 transitions. [2020-10-12 10:17:05,468 INFO L480 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-10-12 10:17:05,468 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 138 transitions. [2020-10-12 10:17:05,469 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-10-12 10:17:05,470 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 10:17:05,470 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 10:17:05,470 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-12 10:17:05,470 INFO L427 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 10:17:05,470 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 10:17:05,471 INFO L82 PathProgramCache]: Analyzing trace with hash 1365476957, now seen corresponding path program 11 times [2020-10-12 10:17:05,471 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 10:17:05,471 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1692143895] [2020-10-12 10:17:05,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 10:17:05,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:17:05,486 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:17:05,503 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:17:05,529 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:17:07,784 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:17:08,170 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:17:08,666 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:17:09,004 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:17:09,408 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:17:09,770 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:17:09,998 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:17:10,485 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:17:10,485 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 58 [2020-10-12 10:17:10,485 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 10 [2020-10-12 10:17:10,485 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-12 10:17:10,487 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:17:10,487 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 30 [2020-10-12 10:17:10,487 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-12 10:17:10,487 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 37 [2020-10-12 10:17:10,487 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 10:17:11,326 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 52 [2020-10-12 10:17:11,462 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 52 [2020-10-12 10:17:11,759 WARN L193 SmtUtils]: Spent 247.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 69 [2020-10-12 10:17:11,988 WARN L193 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 61 [2020-10-12 10:17:12,152 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 54 [2020-10-12 10:17:12,322 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 52 [2020-10-12 10:17:12,472 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 45 [2020-10-12 10:17:12,672 WARN L193 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 55 [2020-10-12 10:17:13,764 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 10:17:13,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:17:13,766 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:17:13,767 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:17:13,767 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 10:17:13,768 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:17:13,768 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 10:17:13,768 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:17:13,768 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:17:13,768 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:17:13,769 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:17:13,769 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:17:13,770 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-12 10:17:13,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:17:13,770 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:17:13,771 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:17:13,771 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:17:13,772 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:17:13,772 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 10:17:13,772 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:17:13,772 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:17:13,772 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:17:13,772 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:17:13,773 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:17:13,793 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 10:17:13,794 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1692143895] [2020-10-12 10:17:13,794 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 10:17:13,794 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31] total 31 [2020-10-12 10:17:13,794 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [508840532] [2020-10-12 10:17:13,794 INFO L459 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-10-12 10:17:13,795 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 10:17:13,795 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-10-12 10:17:13,795 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=834, Unknown=0, NotChecked=0, Total=930 [2020-10-12 10:17:13,795 INFO L87 Difference]: Start difference. First operand 124 states and 138 transitions. Second operand 31 states. [2020-10-12 10:17:14,679 WARN L193 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 54 [2020-10-12 10:17:15,227 WARN L193 SmtUtils]: Spent 178.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 49 [2020-10-12 10:17:15,456 WARN L193 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 55 [2020-10-12 10:17:15,688 WARN L193 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 57 [2020-10-12 10:17:15,906 WARN L193 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 60 [2020-10-12 10:17:16,114 WARN L193 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 55 [2020-10-12 10:17:16,376 WARN L193 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 51 [2020-10-12 10:17:16,725 WARN L193 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 61 [2020-10-12 10:17:16,920 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 51 [2020-10-12 10:17:17,157 WARN L193 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 109 DAG size of output: 55 [2020-10-12 10:17:17,816 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 45 [2020-10-12 10:17:18,359 WARN L193 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 57 [2020-10-12 10:17:18,648 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 53 [2020-10-12 10:17:19,687 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 10:17:19,688 INFO L93 Difference]: Finished difference Result 202 states and 226 transitions. [2020-10-12 10:17:19,689 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2020-10-12 10:17:19,689 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 48 [2020-10-12 10:17:19,689 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 10:17:19,690 INFO L225 Difference]: With dead ends: 202 [2020-10-12 10:17:19,691 INFO L226 Difference]: Without dead ends: 195 [2020-10-12 10:17:19,693 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 971 ImplicationChecksByTransitivity, 7.6s TimeCoverageRelationStatistics Valid=430, Invalid=3602, Unknown=0, NotChecked=0, Total=4032 [2020-10-12 10:17:19,693 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 195 states. [2020-10-12 10:17:19,716 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 195 to 155. [2020-10-12 10:17:19,716 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 155 states. [2020-10-12 10:17:19,717 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 174 transitions. [2020-10-12 10:17:19,717 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 174 transitions. Word has length 48 [2020-10-12 10:17:19,718 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 10:17:19,718 INFO L479 AbstractCegarLoop]: Abstraction has 155 states and 174 transitions. [2020-10-12 10:17:19,718 INFO L480 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-10-12 10:17:19,718 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 174 transitions. [2020-10-12 10:17:19,719 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-10-12 10:17:19,719 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 10:17:19,719 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 10:17:19,719 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-12 10:17:19,720 INFO L427 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 10:17:19,720 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 10:17:19,720 INFO L82 PathProgramCache]: Analyzing trace with hash 913925789, now seen corresponding path program 12 times [2020-10-12 10:17:19,720 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 10:17:19,720 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2135670672] [2020-10-12 10:17:19,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 10:17:19,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:17:19,736 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:17:19,746 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:17:19,754 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:17:19,818 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:17:19,835 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:17:19,841 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:17:20,043 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:17:20,281 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:17:23,117 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:17:24,731 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:17:24,731 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 58 [2020-10-12 10:17:24,731 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-12 10:17:24,731 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4999 [2020-10-12 10:17:24,732 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:17:24,732 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-12 10:17:24,732 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-12 10:17:24,732 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-10-12 10:17:24,732 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:17:24,824 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 10:17:24,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:17:24,826 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:17:24,828 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:17:24,828 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 10:17:24,828 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:17:24,828 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 10:17:24,828 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:17:24,828 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:17:24,829 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:17:24,829 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:17:24,829 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:17:24,830 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-12 10:17:24,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:17:24,831 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:17:24,831 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:17:24,832 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:17:24,832 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:17:24,832 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 10:17:24,832 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:17:24,832 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:17:24,832 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:17:24,832 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:17:24,832 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:17:24,835 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 16 proven. 9 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2020-10-12 10:17:24,835 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2135670672] [2020-10-12 10:17:24,835 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 10:17:24,835 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-12 10:17:24,835 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1126507224] [2020-10-12 10:17:24,836 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-12 10:17:24,836 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 10:17:24,836 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-12 10:17:24,837 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2020-10-12 10:17:24,837 INFO L87 Difference]: Start difference. First operand 155 states and 174 transitions. Second operand 12 states. [2020-10-12 10:17:25,546 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 10:17:25,547 INFO L93 Difference]: Finished difference Result 253 states and 289 transitions. [2020-10-12 10:17:25,548 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-12 10:17:25,548 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 48 [2020-10-12 10:17:25,548 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 10:17:25,550 INFO L225 Difference]: With dead ends: 253 [2020-10-12 10:17:25,550 INFO L226 Difference]: Without dead ends: 186 [2020-10-12 10:17:25,552 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=132, Invalid=330, Unknown=0, NotChecked=0, Total=462 [2020-10-12 10:17:25,552 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 186 states. [2020-10-12 10:17:25,567 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 186 to 164. [2020-10-12 10:17:25,568 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 164 states. [2020-10-12 10:17:25,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 184 transitions. [2020-10-12 10:17:25,569 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 184 transitions. Word has length 48 [2020-10-12 10:17:25,569 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 10:17:25,569 INFO L479 AbstractCegarLoop]: Abstraction has 164 states and 184 transitions. [2020-10-12 10:17:25,570 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-12 10:17:25,570 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 184 transitions. [2020-10-12 10:17:25,570 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2020-10-12 10:17:25,570 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 10:17:25,571 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 10:17:25,571 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-12 10:17:25,571 INFO L427 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 10:17:25,571 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 10:17:25,571 INFO L82 PathProgramCache]: Analyzing trace with hash -1976046599, now seen corresponding path program 1 times [2020-10-12 10:17:25,572 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 10:17:25,572 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [50600784] [2020-10-12 10:17:25,572 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 10:17:25,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:17:25,588 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:17:25,715 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:17:25,827 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:17:26,028 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:17:26,208 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:17:26,389 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:17:26,569 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:17:26,772 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:17:26,984 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:17:27,148 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:17:27,290 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:17:27,493 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:17:27,862 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:17:27,934 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:17:28,318 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:17:28,916 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:17:29,102 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:17:29,284 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:17:29,502 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:17:29,694 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:17:29,828 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:17:29,960 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:17:30,106 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:17:30,589 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:17:30,589 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 62 [2020-10-12 10:17:30,589 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 23 [2020-10-12 10:17:30,589 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5007 [2020-10-12 10:17:30,590 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:17:30,590 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 26 [2020-10-12 10:17:30,590 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-12 10:17:30,590 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 41 [2020-10-12 10:17:30,590 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:17:31,480 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 52 [2020-10-12 10:17:32,388 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 10:17:32,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:17:32,390 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:17:32,392 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:17:32,392 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 10:17:32,392 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:17:32,392 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 10:17:32,392 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:17:32,393 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:17:32,393 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:17:32,393 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:17:32,393 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:17:32,394 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-12 10:17:32,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:17:32,395 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:17:32,395 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:17:32,396 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:17:32,396 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:17:32,396 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 10:17:32,396 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:17:32,396 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:17:32,396 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:17:32,396 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:17:32,396 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:17:32,397 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2020-10-12 10:17:32,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:17:32,399 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:17:32,401 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:17:32,401 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:17:32,401 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:17:32,402 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 10:17:32,402 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:17:32,402 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 10:17:32,402 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:17:32,402 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-12 10:17:32,402 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:17:32,417 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 3 proven. 16 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-12 10:17:32,417 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [50600784] [2020-10-12 10:17:32,417 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 10:17:32,417 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2020-10-12 10:17:32,418 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [453339061] [2020-10-12 10:17:32,418 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-10-12 10:17:32,418 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 10:17:32,418 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-10-12 10:17:32,419 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=571, Unknown=0, NotChecked=0, Total=650 [2020-10-12 10:17:32,419 INFO L87 Difference]: Start difference. First operand 164 states and 184 transitions. Second operand 26 states. [2020-10-12 10:17:33,939 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 51 [2020-10-12 10:17:34,095 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 50 [2020-10-12 10:17:34,505 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 48 [2020-10-12 10:17:35,692 WARN L193 SmtUtils]: Spent 191.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 47 [2020-10-12 10:17:35,937 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 56 [2020-10-12 10:17:36,101 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 48 [2020-10-12 10:17:36,463 WARN L193 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 44 [2020-10-12 10:17:36,672 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 10:17:36,672 INFO L93 Difference]: Finished difference Result 188 states and 209 transitions. [2020-10-12 10:17:36,673 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2020-10-12 10:17:36,673 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 50 [2020-10-12 10:17:36,674 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 10:17:36,676 INFO L225 Difference]: With dead ends: 188 [2020-10-12 10:17:36,676 INFO L226 Difference]: Without dead ends: 157 [2020-10-12 10:17:36,677 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 747 ImplicationChecksByTransitivity, 5.1s TimeCoverageRelationStatistics Valid=380, Invalid=2700, Unknown=0, NotChecked=0, Total=3080 [2020-10-12 10:17:36,678 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2020-10-12 10:17:36,693 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 152. [2020-10-12 10:17:36,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 152 states. [2020-10-12 10:17:36,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 170 transitions. [2020-10-12 10:17:36,695 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 170 transitions. Word has length 50 [2020-10-12 10:17:36,695 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 10:17:36,695 INFO L479 AbstractCegarLoop]: Abstraction has 152 states and 170 transitions. [2020-10-12 10:17:36,695 INFO L480 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-10-12 10:17:36,695 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 170 transitions. [2020-10-12 10:17:36,696 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2020-10-12 10:17:36,696 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 10:17:36,696 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 10:17:36,696 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-12 10:17:36,696 INFO L427 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 10:17:36,697 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 10:17:36,697 INFO L82 PathProgramCache]: Analyzing trace with hash 535148763, now seen corresponding path program 13 times [2020-10-12 10:17:36,697 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 10:17:36,697 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [546858830] [2020-10-12 10:17:36,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 10:17:36,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:17:36,713 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:17:36,728 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:17:36,745 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:17:36,771 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:17:36,781 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:17:36,804 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:17:36,933 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:17:37,833 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:17:37,840 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:17:38,994 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:17:41,710 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:17:41,710 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 60 [2020-10-12 10:17:41,710 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 10 [2020-10-12 10:17:41,710 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-12 10:17:41,710 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:17:41,711 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-12 10:17:41,711 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 30 [2020-10-12 10:17:41,711 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-12 10:17:41,711 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:17:41,825 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 10:17:41,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:17:41,827 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:17:41,829 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:17:41,829 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 10:17:41,829 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:17:41,830 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 10:17:41,830 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:17:41,830 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:17:41,831 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:17:41,831 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:17:41,831 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 10:17:41,833 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-12 10:17:41,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:17:41,834 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:17:41,835 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:17:41,835 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:17:41,836 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:17:41,836 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 10:17:41,836 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:17:41,836 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:17:41,837 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:17:41,837 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:17:41,837 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 10:17:41,843 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 9 proven. 16 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2020-10-12 10:17:41,843 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [546858830] [2020-10-12 10:17:41,844 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 10:17:41,844 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-12 10:17:41,844 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [110001232] [2020-10-12 10:17:41,845 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-12 10:17:41,845 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 10:17:41,845 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-12 10:17:41,845 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2020-10-12 10:17:41,846 INFO L87 Difference]: Start difference. First operand 152 states and 170 transitions. Second operand 12 states. [2020-10-12 10:17:42,821 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 10:17:42,821 INFO L93 Difference]: Finished difference Result 213 states and 234 transitions. [2020-10-12 10:17:42,822 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-12 10:17:42,822 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 50 [2020-10-12 10:17:42,822 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 10:17:42,824 INFO L225 Difference]: With dead ends: 213 [2020-10-12 10:17:42,824 INFO L226 Difference]: Without dead ends: 134 [2020-10-12 10:17:42,827 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=104, Invalid=316, Unknown=0, NotChecked=0, Total=420 [2020-10-12 10:17:42,827 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2020-10-12 10:17:42,838 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 119. [2020-10-12 10:17:42,838 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 119 states. [2020-10-12 10:17:42,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 126 transitions. [2020-10-12 10:17:42,839 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 126 transitions. Word has length 50 [2020-10-12 10:17:42,839 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 10:17:42,840 INFO L479 AbstractCegarLoop]: Abstraction has 119 states and 126 transitions. [2020-10-12 10:17:42,840 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-12 10:17:42,840 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 126 transitions. [2020-10-12 10:17:42,840 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-10-12 10:17:42,841 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 10:17:42,841 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 10:17:42,841 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-12 10:17:42,841 INFO L427 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 10:17:42,841 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 10:17:42,841 INFO L82 PathProgramCache]: Analyzing trace with hash 463053875, now seen corresponding path program 2 times [2020-10-12 10:17:42,842 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 10:17:42,842 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [279054364] [2020-10-12 10:17:42,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 10:17:42,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:17:42,859 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:17:42,880 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:17:42,888 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:17:43,453 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:17:44,060 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:17:45,684 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:17:46,065 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:17:46,564 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:17:46,963 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:17:47,038 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:17:47,279 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:17:47,465 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:17:47,858 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:17:47,858 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 68 [2020-10-12 10:17:47,858 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 12 [2020-10-12 10:17:47,858 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-12 10:17:47,858 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:17:47,858 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 31 [2020-10-12 10:17:47,859 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-12 10:17:47,859 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 42 [2020-10-12 10:17:47,859 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:17:48,265 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 36 [2020-10-12 10:17:49,097 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 50 [2020-10-12 10:17:49,241 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 49 [2020-10-12 10:17:49,546 WARN L193 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 62 [2020-10-12 10:17:49,705 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 53 [2020-10-12 10:17:50,797 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 10:17:50,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:17:50,799 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:17:50,800 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:17:50,800 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 10:17:50,801 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:17:50,801 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 10:17:50,801 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:17:50,801 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:17:50,801 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:17:50,801 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:17:50,802 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:17:50,802 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-12 10:17:50,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:17:50,803 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:17:50,803 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:17:50,804 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:17:50,804 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:17:50,804 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 10:17:50,804 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:17:50,804 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:17:50,804 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:17:50,804 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:17:50,804 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:17:50,805 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2020-10-12 10:17:50,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:17:50,806 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:17:50,809 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:17:50,809 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:17:50,809 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:17:50,809 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 10:17:50,809 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:17:50,809 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-12 10:17:50,810 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:17:50,810 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-12 10:17:50,810 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:17:50,918 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 9 proven. 23 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-12 10:17:50,918 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [279054364] [2020-10-12 10:17:50,921 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 10:17:50,922 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31] total 31 [2020-10-12 10:17:50,922 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2060091412] [2020-10-12 10:17:50,923 INFO L459 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-10-12 10:17:50,923 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 10:17:50,923 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-10-12 10:17:50,924 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=182, Invalid=748, Unknown=0, NotChecked=0, Total=930 [2020-10-12 10:17:50,924 INFO L87 Difference]: Start difference. First operand 119 states and 126 transitions. Second operand 31 states. [2020-10-12 10:17:52,789 WARN L193 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 47 [2020-10-12 10:17:53,000 WARN L193 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 60 [2020-10-12 10:17:53,294 WARN L193 SmtUtils]: Spent 214.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 63 [2020-10-12 10:17:53,856 WARN L193 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 51 [2020-10-12 10:17:54,066 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 51 [2020-10-12 10:17:54,292 WARN L193 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 60 [2020-10-12 10:17:54,462 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 48 [2020-10-12 10:17:54,981 WARN L193 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 45 [2020-10-12 10:17:55,327 WARN L193 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 52 [2020-10-12 10:17:55,493 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 50 [2020-10-12 10:17:56,070 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 10:17:56,070 INFO L93 Difference]: Finished difference Result 137 states and 147 transitions. [2020-10-12 10:17:56,071 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2020-10-12 10:17:56,071 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 56 [2020-10-12 10:17:56,072 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 10:17:56,073 INFO L225 Difference]: With dead ends: 137 [2020-10-12 10:17:56,073 INFO L226 Difference]: Without dead ends: 122 [2020-10-12 10:17:56,075 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1062 ImplicationChecksByTransitivity, 7.0s TimeCoverageRelationStatistics Valid=767, Invalid=3139, Unknown=0, NotChecked=0, Total=3906 [2020-10-12 10:17:56,075 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2020-10-12 10:17:56,085 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 106. [2020-10-12 10:17:56,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 106 states. [2020-10-12 10:17:56,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 112 transitions. [2020-10-12 10:17:56,086 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 112 transitions. Word has length 56 [2020-10-12 10:17:56,087 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 10:17:56,087 INFO L479 AbstractCegarLoop]: Abstraction has 106 states and 112 transitions. [2020-10-12 10:17:56,087 INFO L480 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-10-12 10:17:56,087 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 112 transitions. [2020-10-12 10:17:56,087 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-10-12 10:17:56,088 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 10:17:56,088 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 10:17:56,088 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-12 10:17:56,088 INFO L427 AbstractCegarLoop]: === Iteration 17 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 10:17:56,088 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 10:17:56,089 INFO L82 PathProgramCache]: Analyzing trace with hash -1355380879, now seen corresponding path program 3 times [2020-10-12 10:17:56,089 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 10:17:56,089 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [150270480] [2020-10-12 10:17:56,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 10:17:56,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:17:56,122 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:17:56,583 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:17:56,936 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:17:57,498 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:17:58,046 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:17:59,881 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:18:00,145 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:18:00,672 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:18:00,917 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:18:01,138 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:18:01,139 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 70 [2020-10-12 10:18:01,139 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-12 10:18:01,139 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5030 [2020-10-12 10:18:01,139 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:18:01,139 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 33 [2020-10-12 10:18:01,139 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-12 10:18:01,139 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 49 [2020-10-12 10:18:01,140 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:18:01,548 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 39 [2020-10-12 10:18:01,732 WARN L193 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 42 [2020-10-12 10:18:01,928 WARN L193 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 45 [2020-10-12 10:18:02,094 WARN L193 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 41 [2020-10-12 10:18:02,275 WARN L193 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 55 [2020-10-12 10:18:02,609 WARN L193 SmtUtils]: Spent 260.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 63 [2020-10-12 10:18:02,912 WARN L193 SmtUtils]: Spent 264.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 66 [2020-10-12 10:18:03,098 WARN L193 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 55 [2020-10-12 10:18:03,261 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 50 [2020-10-12 10:18:03,436 WARN L193 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 51 [2020-10-12 10:18:03,721 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 48 [2020-10-12 10:18:03,948 WARN L193 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 63 [2020-10-12 10:18:05,503 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 10:18:05,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:18:05,507 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:18:05,508 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:18:05,508 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 10:18:05,509 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:18:05,509 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 10:18:05,509 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:18:05,509 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:18:05,509 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:18:05,509 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:18:05,510 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:18:05,511 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-12 10:18:05,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:18:05,512 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:18:05,513 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:18:05,513 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:18:05,513 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:18:05,513 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 10:18:05,514 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:18:05,514 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:18:05,514 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:18:05,514 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:18:05,514 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:18:05,516 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2020-10-12 10:18:05,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:18:05,518 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:18:05,520 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:18:05,520 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:18:05,520 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:18:05,520 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 10:18:05,520 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:18:05,521 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 10:18:05,521 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:18:05,521 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-12 10:18:05,521 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:18:05,547 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 2 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 10:18:05,548 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [150270480] [2020-10-12 10:18:05,548 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 10:18:05,548 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33] total 33 [2020-10-12 10:18:05,548 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [397985518] [2020-10-12 10:18:05,548 INFO L459 AbstractCegarLoop]: Interpolant automaton has 33 states [2020-10-12 10:18:05,549 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 10:18:05,549 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2020-10-12 10:18:05,549 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=977, Unknown=0, NotChecked=0, Total=1056 [2020-10-12 10:18:05,549 INFO L87 Difference]: Start difference. First operand 106 states and 112 transitions. Second operand 33 states. [2020-10-12 10:18:06,169 WARN L193 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 52 [2020-10-12 10:18:06,439 WARN L193 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 42 [2020-10-12 10:18:06,839 WARN L193 SmtUtils]: Spent 228.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 66 [2020-10-12 10:18:07,031 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 52 [2020-10-12 10:18:07,256 WARN L193 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 54 [2020-10-12 10:18:07,553 WARN L193 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 52 [2020-10-12 10:18:07,930 WARN L193 SmtUtils]: Spent 266.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 55 [2020-10-12 10:18:08,231 WARN L193 SmtUtils]: Spent 188.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 54 [2020-10-12 10:18:08,489 WARN L193 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 52 [2020-10-12 10:18:08,824 WARN L193 SmtUtils]: Spent 227.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 64 [2020-10-12 10:18:09,235 WARN L193 SmtUtils]: Spent 296.00 ms on a formula simplification. DAG size of input: 125 DAG size of output: 61 [2020-10-12 10:18:09,561 WARN L193 SmtUtils]: Spent 245.00 ms on a formula simplification. DAG size of input: 124 DAG size of output: 56 [2020-10-12 10:18:09,848 WARN L193 SmtUtils]: Spent 177.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 50 [2020-10-12 10:18:10,180 WARN L193 SmtUtils]: Spent 213.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 58 [2020-10-12 10:18:10,449 WARN L193 SmtUtils]: Spent 182.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 62 [2020-10-12 10:18:10,720 WARN L193 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 51 [2020-10-12 10:18:10,892 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 43 [2020-10-12 10:18:11,175 WARN L193 SmtUtils]: Spent 189.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 59 [2020-10-12 10:18:11,865 WARN L193 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 58 [2020-10-12 10:18:12,090 WARN L193 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 50 [2020-10-12 10:18:14,410 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 10:18:14,410 INFO L93 Difference]: Finished difference Result 116 states and 122 transitions. [2020-10-12 10:18:14,411 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2020-10-12 10:18:14,411 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 58 [2020-10-12 10:18:14,412 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 10:18:14,413 INFO L225 Difference]: With dead ends: 116 [2020-10-12 10:18:14,413 INFO L226 Difference]: Without dead ends: 112 [2020-10-12 10:18:14,415 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1016 ImplicationChecksByTransitivity, 11.2s TimeCoverageRelationStatistics Valid=461, Invalid=4509, Unknown=0, NotChecked=0, Total=4970 [2020-10-12 10:18:14,416 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2020-10-12 10:18:14,431 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 108. [2020-10-12 10:18:14,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 108 states. [2020-10-12 10:18:14,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 113 transitions. [2020-10-12 10:18:14,432 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 113 transitions. Word has length 58 [2020-10-12 10:18:14,433 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 10:18:14,433 INFO L479 AbstractCegarLoop]: Abstraction has 108 states and 113 transitions. [2020-10-12 10:18:14,433 INFO L480 AbstractCegarLoop]: Interpolant automaton has 33 states. [2020-10-12 10:18:14,433 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 113 transitions. [2020-10-12 10:18:14,433 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-10-12 10:18:14,433 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 10:18:14,434 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 10:18:14,434 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-12 10:18:14,434 INFO L427 AbstractCegarLoop]: === Iteration 18 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 10:18:14,434 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 10:18:14,434 INFO L82 PathProgramCache]: Analyzing trace with hash -244415725, now seen corresponding path program 14 times [2020-10-12 10:18:14,434 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 10:18:14,435 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1308529361] [2020-10-12 10:18:14,435 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 10:18:14,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:18:14,467 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:18:14,896 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:18:15,845 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:18:16,659 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:18:17,801 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:18:19,058 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:18:20,020 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:18:20,020 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 68 [2020-10-12 10:18:20,020 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-12 10:18:20,021 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5569 [2020-10-12 10:18:20,021 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:18:20,021 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 38 [2020-10-12 10:18:20,021 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-12 10:18:20,022 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 47 [2020-10-12 10:18:20,022 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 10:18:20,546 WARN L193 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 34 [2020-10-12 10:18:20,764 WARN L193 SmtUtils]: Spent 176.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 39 [2020-10-12 10:18:20,935 WARN L193 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 39 [2020-10-12 10:18:21,132 WARN L193 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 44 [2020-10-12 10:18:21,340 WARN L193 SmtUtils]: Spent 172.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 51 [2020-10-12 10:18:21,565 WARN L193 SmtUtils]: Spent 172.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 54 [2020-10-12 10:18:21,734 WARN L193 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 46 [2020-10-12 10:18:21,965 WARN L193 SmtUtils]: Spent 184.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 60 [2020-10-12 10:18:22,190 WARN L193 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 60 [2020-10-12 10:18:22,401 WARN L193 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 58 [2020-10-12 10:18:22,663 WARN L193 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 60 [2020-10-12 10:18:22,918 WARN L193 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 58 [2020-10-12 10:18:23,096 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 55 [2020-10-12 10:18:23,281 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 52 [2020-10-12 10:18:23,898 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 59 [2020-10-12 10:18:24,202 WARN L193 SmtUtils]: Spent 193.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 68 [2020-10-12 10:18:24,423 WARN L193 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 56 [2020-10-12 10:18:24,652 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 42 [2020-10-12 10:18:26,110 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 10:18:26,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:18:26,116 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:18:26,118 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:18:26,118 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 10:18:26,119 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:18:26,119 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-12 10:18:26,119 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:18:26,119 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:18:26,119 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:18:26,119 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:18:26,120 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:18:26,121 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-12 10:18:26,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:18:26,123 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:18:26,125 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:18:26,126 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:18:26,126 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:18:26,126 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 10:18:26,126 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:18:26,126 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:18:26,126 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:18:26,127 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:18:26,127 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:18:26,161 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 58 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-10-12 10:18:26,161 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1308529361] [2020-10-12 10:18:26,162 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 10:18:26,162 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36] total 36 [2020-10-12 10:18:26,162 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1401169736] [2020-10-12 10:18:26,162 INFO L459 AbstractCegarLoop]: Interpolant automaton has 36 states [2020-10-12 10:18:26,163 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 10:18:26,163 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2020-10-12 10:18:26,164 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=1167, Unknown=0, NotChecked=0, Total=1260 [2020-10-12 10:18:26,164 INFO L87 Difference]: Start difference. First operand 108 states and 113 transitions. Second operand 36 states. [2020-10-12 10:18:26,706 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 34 [2020-10-12 10:18:27,045 WARN L193 SmtUtils]: Spent 203.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 58 [2020-10-12 10:18:27,342 WARN L193 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 47 [2020-10-12 10:18:27,850 WARN L193 SmtUtils]: Spent 310.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 74 [2020-10-12 10:18:28,167 WARN L193 SmtUtils]: Spent 191.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 62 [2020-10-12 10:18:28,555 WARN L193 SmtUtils]: Spent 232.00 ms on a formula simplification. DAG size of input: 124 DAG size of output: 60 [2020-10-12 10:18:29,020 WARN L193 SmtUtils]: Spent 272.00 ms on a formula simplification. DAG size of input: 118 DAG size of output: 57 [2020-10-12 10:18:29,489 WARN L193 SmtUtils]: Spent 284.00 ms on a formula simplification. DAG size of input: 126 DAG size of output: 58 [2020-10-12 10:18:29,864 WARN L193 SmtUtils]: Spent 224.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 66 [2020-10-12 10:18:30,256 WARN L193 SmtUtils]: Spent 238.00 ms on a formula simplification. DAG size of input: 104 DAG size of output: 66 [2020-10-12 10:18:30,672 WARN L193 SmtUtils]: Spent 250.00 ms on a formula simplification. DAG size of input: 108 DAG size of output: 63 [2020-10-12 10:18:31,296 WARN L193 SmtUtils]: Spent 450.00 ms on a formula simplification. DAG size of input: 155 DAG size of output: 66 [2020-10-12 10:18:31,794 WARN L193 SmtUtils]: Spent 358.00 ms on a formula simplification. DAG size of input: 139 DAG size of output: 59 [2020-10-12 10:18:32,305 WARN L193 SmtUtils]: Spent 351.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 68 [2020-10-12 10:18:32,726 WARN L193 SmtUtils]: Spent 268.00 ms on a formula simplification. DAG size of input: 123 DAG size of output: 61 [2020-10-12 10:18:33,331 WARN L193 SmtUtils]: Spent 237.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 61 [2020-10-12 10:18:33,999 WARN L193 SmtUtils]: Spent 451.00 ms on a formula simplification. DAG size of input: 164 DAG size of output: 69 [2020-10-12 10:18:34,437 WARN L193 SmtUtils]: Spent 259.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 63 [2020-10-12 10:18:34,894 WARN L193 SmtUtils]: Spent 327.00 ms on a formula simplification. DAG size of input: 163 DAG size of output: 50 [2020-10-12 10:18:35,156 WARN L193 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 47 [2020-10-12 10:18:35,655 WARN L193 SmtUtils]: Spent 327.00 ms on a formula simplification. DAG size of input: 111 DAG size of output: 55 [2020-10-12 10:18:36,088 WARN L193 SmtUtils]: Spent 297.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 71 [2020-10-12 10:18:36,400 WARN L193 SmtUtils]: Spent 204.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 56 [2020-10-12 10:18:36,803 WARN L193 SmtUtils]: Spent 260.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 51 [2020-10-12 10:18:37,046 WARN L193 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 45 [2020-10-12 10:18:37,520 WARN L193 SmtUtils]: Spent 285.00 ms on a formula simplification. DAG size of input: 106 DAG size of output: 73 [2020-10-12 10:18:37,840 WARN L193 SmtUtils]: Spent 191.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 64 [2020-10-12 10:18:38,210 WARN L193 SmtUtils]: Spent 231.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 78 [2020-10-12 10:18:38,540 WARN L193 SmtUtils]: Spent 183.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 61 [2020-10-12 10:18:38,965 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 34 [2020-10-12 10:18:39,975 WARN L193 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 40 [2020-10-12 10:18:40,811 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 10:18:40,812 INFO L93 Difference]: Finished difference Result 149 states and 159 transitions. [2020-10-12 10:18:40,813 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2020-10-12 10:18:40,814 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 58 [2020-10-12 10:18:40,814 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 10:18:40,816 INFO L225 Difference]: With dead ends: 149 [2020-10-12 10:18:40,816 INFO L226 Difference]: Without dead ends: 147 [2020-10-12 10:18:40,818 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 5 SyntacticMatches, 4 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1109 ImplicationChecksByTransitivity, 17.4s TimeCoverageRelationStatistics Valid=531, Invalid=4871, Unknown=0, NotChecked=0, Total=5402 [2020-10-12 10:18:40,818 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2020-10-12 10:18:40,834 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 137. [2020-10-12 10:18:40,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 137 states. [2020-10-12 10:18:40,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 145 transitions. [2020-10-12 10:18:40,835 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 145 transitions. Word has length 58 [2020-10-12 10:18:40,836 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 10:18:40,836 INFO L479 AbstractCegarLoop]: Abstraction has 137 states and 145 transitions. [2020-10-12 10:18:40,836 INFO L480 AbstractCegarLoop]: Interpolant automaton has 36 states. [2020-10-12 10:18:40,836 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 145 transitions. [2020-10-12 10:18:40,836 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2020-10-12 10:18:40,837 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 10:18:40,837 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 10:18:40,837 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-12 10:18:40,837 INFO L427 AbstractCegarLoop]: === Iteration 19 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 10:18:40,837 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 10:18:40,838 INFO L82 PathProgramCache]: Analyzing trace with hash -84287727, now seen corresponding path program 15 times [2020-10-12 10:18:40,838 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 10:18:40,838 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [359772516] [2020-10-12 10:18:40,838 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 10:18:40,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:18:40,859 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:18:40,894 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:18:41,278 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:18:45,850 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:18:45,850 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 70 [2020-10-12 10:18:45,850 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-12 10:18:45,850 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4999 [2020-10-12 10:18:45,851 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:18:45,851 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-12 10:18:45,851 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 40 [2020-10-12 10:18:45,851 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-12 10:18:45,851 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:18:46,033 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 10:18:46,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:18:46,035 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:18:46,036 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:18:46,037 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 10:18:46,037 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:18:46,037 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 10:18:46,038 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:18:46,038 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:18:46,038 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:18:46,038 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:18:46,038 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:18:46,040 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-12 10:18:46,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:18:46,041 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:18:46,042 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:18:46,042 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:18:46,042 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:18:46,043 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 10:18:46,043 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:18:46,043 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:18:46,043 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:18:46,043 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:18:46,044 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:18:46,049 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 16 proven. 25 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2020-10-12 10:18:46,049 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [359772516] [2020-10-12 10:18:46,050 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 10:18:46,050 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-12 10:18:46,050 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [694673975] [2020-10-12 10:18:46,050 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-12 10:18:46,051 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 10:18:46,051 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-12 10:18:46,051 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2020-10-12 10:18:46,051 INFO L87 Difference]: Start difference. First operand 137 states and 145 transitions. Second operand 14 states. [2020-10-12 10:18:47,468 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 10:18:47,468 INFO L93 Difference]: Finished difference Result 250 states and 273 transitions. [2020-10-12 10:18:47,470 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-12 10:18:47,470 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 60 [2020-10-12 10:18:47,470 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 10:18:47,472 INFO L225 Difference]: With dead ends: 250 [2020-10-12 10:18:47,472 INFO L226 Difference]: Without dead ends: 200 [2020-10-12 10:18:47,473 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=145, Invalid=455, Unknown=0, NotChecked=0, Total=600 [2020-10-12 10:18:47,473 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 200 states. [2020-10-12 10:18:47,495 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 200 to 153. [2020-10-12 10:18:47,495 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 153 states. [2020-10-12 10:18:47,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 162 transitions. [2020-10-12 10:18:47,497 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 162 transitions. Word has length 60 [2020-10-12 10:18:47,497 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 10:18:47,497 INFO L479 AbstractCegarLoop]: Abstraction has 153 states and 162 transitions. [2020-10-12 10:18:47,497 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-12 10:18:47,497 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 162 transitions. [2020-10-12 10:18:47,498 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2020-10-12 10:18:47,498 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 10:18:47,499 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 10:18:47,499 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-12 10:18:47,499 INFO L427 AbstractCegarLoop]: === Iteration 20 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 10:18:47,499 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 10:18:47,499 INFO L82 PathProgramCache]: Analyzing trace with hash 543261519, now seen corresponding path program 16 times [2020-10-12 10:18:47,500 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 10:18:47,500 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1739919061] [2020-10-12 10:18:47,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 10:18:47,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:18:47,524 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:18:47,558 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:18:47,812 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:18:47,849 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:18:52,523 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:18:52,523 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 72 [2020-10-12 10:18:52,523 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-12 10:18:52,523 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5009 [2020-10-12 10:18:52,524 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:18:52,524 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-12 10:18:52,524 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-12 10:18:52,524 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-12 10:18:52,524 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:18:52,681 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 10:18:52,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:18:52,683 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:18:52,685 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:18:52,686 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 10:18:52,686 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:18:52,686 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 10:18:52,686 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:18:52,686 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:18:52,686 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:18:52,686 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:18:52,686 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:18:52,688 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-12 10:18:52,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:18:52,689 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:18:52,690 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:18:52,690 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:18:52,690 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:18:52,691 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 10:18:52,691 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:18:52,691 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:18:52,691 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:18:52,691 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:18:52,692 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:18:52,695 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 25 proven. 16 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2020-10-12 10:18:52,695 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1739919061] [2020-10-12 10:18:52,695 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 10:18:52,695 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-12 10:18:52,696 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [326735144] [2020-10-12 10:18:52,696 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-12 10:18:52,696 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 10:18:52,696 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-12 10:18:52,697 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2020-10-12 10:18:52,697 INFO L87 Difference]: Start difference. First operand 153 states and 162 transitions. Second operand 14 states. [2020-10-12 10:18:53,815 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 10:18:53,815 INFO L93 Difference]: Finished difference Result 244 states and 264 transitions. [2020-10-12 10:18:53,817 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-12 10:18:53,817 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 62 [2020-10-12 10:18:53,818 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 10:18:53,819 INFO L225 Difference]: With dead ends: 244 [2020-10-12 10:18:53,820 INFO L226 Difference]: Without dead ends: 195 [2020-10-12 10:18:53,821 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=142, Invalid=410, Unknown=0, NotChecked=0, Total=552 [2020-10-12 10:18:53,821 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 195 states. [2020-10-12 10:18:53,848 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 195 to 169. [2020-10-12 10:18:53,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 169 states. [2020-10-12 10:18:53,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 177 transitions. [2020-10-12 10:18:53,849 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 177 transitions. Word has length 62 [2020-10-12 10:18:53,849 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 10:18:53,850 INFO L479 AbstractCegarLoop]: Abstraction has 169 states and 177 transitions. [2020-10-12 10:18:53,850 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-12 10:18:53,850 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 177 transitions. [2020-10-12 10:18:53,851 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-10-12 10:18:53,851 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 10:18:53,851 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 10:18:53,851 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-10-12 10:18:53,852 INFO L427 AbstractCegarLoop]: === Iteration 21 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 10:18:53,852 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 10:18:53,852 INFO L82 PathProgramCache]: Analyzing trace with hash -801877689, now seen corresponding path program 4 times [2020-10-12 10:18:53,852 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 10:18:53,853 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [69269752] [2020-10-12 10:18:53,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 10:18:53,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:18:53,889 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:18:54,162 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:18:54,396 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:18:54,683 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:18:55,941 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:18:56,192 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:18:56,667 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:18:57,678 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:18:58,105 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:18:58,874 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:18:58,875 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 80 [2020-10-12 10:18:58,875 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-12 10:18:58,875 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-12 10:18:58,875 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:18:58,875 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 34 [2020-10-12 10:18:58,875 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-12 10:18:58,875 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 59 [2020-10-12 10:18:58,875 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:18:59,431 WARN L193 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 38 [2020-10-12 10:18:59,593 WARN L193 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 36 [2020-10-12 10:18:59,739 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 35 [2020-10-12 10:18:59,891 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 41 [2020-10-12 10:19:00,090 WARN L193 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 48 [2020-10-12 10:19:00,325 WARN L193 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 47 [2020-10-12 10:19:00,517 WARN L193 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 47 [2020-10-12 10:19:00,716 WARN L193 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 47 [2020-10-12 10:19:00,902 WARN L193 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 43 [2020-10-12 10:19:01,214 WARN L193 SmtUtils]: Spent 254.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 55 [2020-10-12 10:19:01,429 WARN L193 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 41 [2020-10-12 10:19:01,603 WARN L193 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 28 [2020-10-12 10:19:01,793 WARN L193 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 29 [2020-10-12 10:19:01,990 WARN L193 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 26 [2020-10-12 10:19:02,183 WARN L193 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 32 [2020-10-12 10:19:02,386 WARN L193 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 33 [2020-10-12 10:19:02,559 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 29 [2020-10-12 10:19:03,072 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 10:19:03,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:19:03,075 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:19:03,076 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:19:03,076 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 10:19:03,076 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:19:03,076 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 10:19:03,076 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:19:03,077 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:19:03,077 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:19:03,077 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:19:03,077 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:19:03,078 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-12 10:19:03,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:19:03,079 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:19:03,080 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:19:03,080 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:19:03,080 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:19:03,080 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 10:19:03,080 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:19:03,080 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:19:03,080 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:19:03,081 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:19:03,081 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:19:03,082 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2020-10-12 10:19:03,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:19:03,085 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:19:03,090 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:19:03,091 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:19:03,091 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:19:03,091 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-12 10:19:03,091 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:19:03,091 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-12 10:19:03,091 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:19:03,091 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-12 10:19:03,091 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:19:03,218 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2020-10-12 10:19:03,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:19:03,222 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:19:03,225 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:19:03,226 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:19:03,226 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:19:03,226 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-12 10:19:03,226 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:19:03,227 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 10:19:03,227 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:19:03,227 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-12 10:19:03,227 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:19:03,294 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 8 proven. 34 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2020-10-12 10:19:03,295 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [69269752] [2020-10-12 10:19:03,295 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 10:19:03,295 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30] total 30 [2020-10-12 10:19:03,295 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [927444550] [2020-10-12 10:19:03,296 INFO L459 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-10-12 10:19:03,296 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 10:19:03,296 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-10-12 10:19:03,297 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=762, Unknown=0, NotChecked=0, Total=870 [2020-10-12 10:19:03,297 INFO L87 Difference]: Start difference. First operand 169 states and 177 transitions. Second operand 30 states. [2020-10-12 10:19:03,626 WARN L193 SmtUtils]: Spent 249.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 59 [2020-10-12 10:19:04,476 WARN L193 SmtUtils]: Spent 364.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 78 [2020-10-12 10:19:04,886 WARN L193 SmtUtils]: Spent 320.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 71 [2020-10-12 10:19:05,210 WARN L193 SmtUtils]: Spent 231.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 50 [2020-10-12 10:19:05,733 WARN L193 SmtUtils]: Spent 255.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 61 [2020-10-12 10:19:06,092 WARN L193 SmtUtils]: Spent 263.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 61 [2020-10-12 10:19:06,504 WARN L193 SmtUtils]: Spent 294.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 65 [2020-10-12 10:19:06,881 WARN L193 SmtUtils]: Spent 271.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 57 [2020-10-12 10:19:07,348 WARN L193 SmtUtils]: Spent 350.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 67 [2020-10-12 10:19:07,895 WARN L193 SmtUtils]: Spent 429.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 82 [2020-10-12 10:19:08,352 WARN L193 SmtUtils]: Spent 375.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 78 [2020-10-12 10:19:08,734 WARN L193 SmtUtils]: Spent 288.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 58 [2020-10-12 10:19:09,138 WARN L193 SmtUtils]: Spent 299.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 62 [2020-10-12 10:19:09,536 WARN L193 SmtUtils]: Spent 301.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 62 [2020-10-12 10:19:09,886 WARN L193 SmtUtils]: Spent 240.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 52 [2020-10-12 10:19:10,209 WARN L193 SmtUtils]: Spent 245.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 52 [2020-10-12 10:19:10,759 WARN L193 SmtUtils]: Spent 333.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 64 [2020-10-12 10:19:11,182 WARN L193 SmtUtils]: Spent 313.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 64 [2020-10-12 10:19:11,759 WARN L193 SmtUtils]: Spent 450.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 74 [2020-10-12 10:19:12,127 WARN L193 SmtUtils]: Spent 279.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 68 [2020-10-12 10:19:12,846 WARN L193 SmtUtils]: Spent 586.00 ms on a formula simplification. DAG size of input: 114 DAG size of output: 99 [2020-10-12 10:19:13,469 WARN L193 SmtUtils]: Spent 534.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 92 [2020-10-12 10:19:14,216 WARN L193 SmtUtils]: Spent 650.00 ms on a formula simplification. DAG size of input: 111 DAG size of output: 102 [2020-10-12 10:19:15,185 WARN L193 SmtUtils]: Spent 615.00 ms on a formula simplification. DAG size of input: 118 DAG size of output: 101 [2020-10-12 10:19:15,832 WARN L193 SmtUtils]: Spent 568.00 ms on a formula simplification. DAG size of input: 107 DAG size of output: 98 [2020-10-12 10:19:16,457 WARN L193 SmtUtils]: Spent 513.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 86 [2020-10-12 10:19:17,088 WARN L193 SmtUtils]: Spent 531.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 87 [2020-10-12 10:19:17,791 WARN L193 SmtUtils]: Spent 536.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 90 [2020-10-12 10:19:18,502 WARN L193 SmtUtils]: Spent 439.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 89 [2020-10-12 10:19:19,263 WARN L193 SmtUtils]: Spent 649.00 ms on a formula simplification. DAG size of input: 107 DAG size of output: 98 [2020-10-12 10:19:19,793 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 10:19:19,793 INFO L93 Difference]: Finished difference Result 179 states and 188 transitions. [2020-10-12 10:19:19,800 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2020-10-12 10:19:19,800 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 66 [2020-10-12 10:19:19,801 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 10:19:19,802 INFO L225 Difference]: With dead ends: 179 [2020-10-12 10:19:19,802 INFO L226 Difference]: Without dead ends: 132 [2020-10-12 10:19:19,804 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 12 SyntacticMatches, 3 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1071 ImplicationChecksByTransitivity, 18.4s TimeCoverageRelationStatistics Valid=635, Invalid=3787, Unknown=0, NotChecked=0, Total=4422 [2020-10-12 10:19:19,805 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2020-10-12 10:19:19,824 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 124. [2020-10-12 10:19:19,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 124 states. [2020-10-12 10:19:19,825 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 131 transitions. [2020-10-12 10:19:19,825 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 131 transitions. Word has length 66 [2020-10-12 10:19:19,826 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 10:19:19,826 INFO L479 AbstractCegarLoop]: Abstraction has 124 states and 131 transitions. [2020-10-12 10:19:19,826 INFO L480 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-10-12 10:19:19,826 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 131 transitions. [2020-10-12 10:19:19,827 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-10-12 10:19:19,827 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 10:19:19,827 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 10:19:19,827 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-10-12 10:19:19,827 INFO L427 AbstractCegarLoop]: === Iteration 22 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 10:19:19,828 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 10:19:19,828 INFO L82 PathProgramCache]: Analyzing trace with hash -678458647, now seen corresponding path program 5 times [2020-10-12 10:19:19,828 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 10:19:19,828 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [174220890] [2020-10-12 10:19:19,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 10:19:19,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:19:19,883 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:19:20,300 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:19:20,909 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:19:22,121 FATAL L256 erpolLogProxyWrapper]: Now shrinking...