/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.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=DEEPEST --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 language data_model -i ../../../trunk/examples/svcomp/array-fpi/s2lif.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-27 14:41:58,488 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-27 14:41:58,491 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-27 14:41:58,550 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-27 14:41:58,550 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-27 14:41:58,557 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-27 14:41:58,560 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-27 14:41:58,565 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-27 14:41:58,568 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-27 14:41:58,574 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-27 14:41:58,576 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-27 14:41:58,577 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-27 14:41:58,578 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-27 14:41:58,581 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-27 14:41:58,584 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-27 14:41:58,586 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-27 14:41:58,587 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-27 14:41:58,591 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-27 14:41:58,598 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-27 14:41:58,607 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-27 14:41:58,609 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-27 14:41:58,611 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-27 14:41:58,612 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-27 14:41:58,615 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-27 14:41:58,624 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-27 14:41:58,624 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-27 14:41:58,624 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-27 14:41:58,627 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-27 14:41:58,627 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-27 14:41:58,628 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-27 14:41:58,629 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-27 14:41:58,630 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-27 14:41:58,632 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-27 14:41:58,633 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-27 14:41:58,656 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-27 14:41:58,656 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-27 14:41:58,657 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-27 14:41:58,658 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-27 14:41:58,658 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-27 14:41:58,659 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-27 14:41:58,659 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-27 14:41:58,664 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 [2020-10-27 14:41:58,709 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-27 14:41:58,710 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-27 14:41:58,716 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-27 14:41:58,716 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-27 14:41:58,716 INFO L138 SettingsManager]: * Use SBE=true [2020-10-27 14:41:58,717 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-27 14:41:58,717 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-27 14:41:58,717 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-27 14:41:58,718 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-27 14:41:58,718 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-27 14:41:58,719 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-27 14:41:58,719 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-27 14:41:58,720 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-27 14:41:58,720 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-27 14:41:58,720 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-27 14:41:58,720 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-27 14:41:58,720 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-27 14:41:58,721 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-27 14:41:58,721 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-27 14:41:58,721 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-27 14:41:58,721 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-27 14:41:58,722 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-27 14:41:58,722 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-27 14:41:58,722 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-27 14:41:58,722 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-27 14:41:58,723 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-27 14:41:58,723 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-27 14:41:58,723 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-27 14:41:58,723 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-27 14:41:58,723 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=DEEPEST;log-additional-information=true;unknown-allowed=true; [2020-10-27 14:41:59,170 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-27 14:41:59,201 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-27 14:41:59,205 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-27 14:41:59,207 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-27 14:41:59,208 INFO L275 PluginConnector]: CDTParser initialized [2020-10-27 14:41:59,209 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-fpi/s2lif.c [2020-10-27 14:41:59,302 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/4cd029aea/19e1c30b4b534ce6abaf180c4e8f99c1/FLAG0bdf4f37e [2020-10-27 14:41:59,970 INFO L306 CDTParser]: Found 1 translation units. [2020-10-27 14:41:59,971 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/array-fpi/s2lif.c [2020-10-27 14:41:59,979 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/4cd029aea/19e1c30b4b534ce6abaf180c4e8f99c1/FLAG0bdf4f37e [2020-10-27 14:42:00,329 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/4cd029aea/19e1c30b4b534ce6abaf180c4e8f99c1 [2020-10-27 14:42:00,332 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-27 14:42:00,339 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-27 14:42:00,341 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-27 14:42:00,341 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-27 14:42:00,345 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-27 14:42:00,346 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 02:42:00" (1/1) ... [2020-10-27 14:42:00,350 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5e76842d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 02:42:00, skipping insertion in model container [2020-10-27 14:42:00,351 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 02:42:00" (1/1) ... [2020-10-27 14:42:00,359 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-27 14:42:00,376 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-27 14:42:00,555 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 14:42:00,569 INFO L203 MainTranslator]: Completed pre-run [2020-10-27 14:42:00,616 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 14:42:00,634 INFO L208 MainTranslator]: Completed translation [2020-10-27 14:42:00,634 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 02:42:00 WrapperNode [2020-10-27 14:42:00,635 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-27 14:42:00,636 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-27 14:42:00,636 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-27 14:42:00,636 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-27 14:42:00,649 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 02:42:00" (1/1) ... [2020-10-27 14:42:00,650 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 02:42:00" (1/1) ... [2020-10-27 14:42:00,659 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 02:42:00" (1/1) ... [2020-10-27 14:42:00,660 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 02:42:00" (1/1) ... [2020-10-27 14:42:00,669 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 02:42:00" (1/1) ... [2020-10-27 14:42:00,675 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 02:42:00" (1/1) ... [2020-10-27 14:42:00,677 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 02:42:00" (1/1) ... [2020-10-27 14:42:00,680 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-27 14:42:00,682 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-27 14:42:00,682 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-27 14:42:00,682 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-27 14:42:00,684 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 02:42:00" (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 [2020-10-27 14:42:00,761 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-27 14:42:00,761 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-27 14:42:00,762 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-27 14:42:00,762 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-10-27 14:42:00,762 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-27 14:42:00,763 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-27 14:42:00,764 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-27 14:42:00,764 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-27 14:42:00,764 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-27 14:42:00,764 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-27 14:42:00,766 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-10-27 14:42:00,766 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-27 14:42:00,767 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-27 14:42:00,767 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-10-27 14:42:00,767 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-27 14:42:00,768 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-10-27 14:42:00,768 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-27 14:42:00,769 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-27 14:42:00,769 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-27 14:42:00,769 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-27 14:42:00,770 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-27 14:42:00,771 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-27 14:42:01,215 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-27 14:42:01,216 INFO L298 CfgBuilder]: Removed 3 assume(true) statements. [2020-10-27 14:42:01,220 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 02:42:01 BoogieIcfgContainer [2020-10-27 14:42:01,220 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-27 14:42:01,225 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-27 14:42:01,225 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-27 14:42:01,228 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-27 14:42:01,229 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.10 02:42:00" (1/3) ... [2020-10-27 14:42:01,230 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@521a8988 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 02:42:01, skipping insertion in model container [2020-10-27 14:42:01,230 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 02:42:00" (2/3) ... [2020-10-27 14:42:01,231 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@521a8988 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 02:42:01, skipping insertion in model container [2020-10-27 14:42:01,231 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 02:42:01" (3/3) ... [2020-10-27 14:42:01,234 INFO L111 eAbstractionObserver]: Analyzing ICFG s2lif.c [2020-10-27 14:42:01,248 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-27 14:42:01,254 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-27 14:42:01,276 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-27 14:42:01,324 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-27 14:42:01,325 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-27 14:42:01,325 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-27 14:42:01,325 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-27 14:42:01,325 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-27 14:42:01,325 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-27 14:42:01,325 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-27 14:42:01,326 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-27 14:42:01,352 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states. [2020-10-27 14:42:01,362 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-27 14:42:01,362 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:42:01,364 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] [2020-10-27 14:42:01,364 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:42:01,376 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:42:01,376 INFO L82 PathProgramCache]: Analyzing trace with hash 371341983, now seen corresponding path program 1 times [2020-10-27 14:42:01,386 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:42:01,387 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1425572764] [2020-10-27 14:42:01,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:42:01,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:42:01,685 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:42:01,781 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:42:01,859 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:42:01,963 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:42:02,493 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:42:02,494 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 36 [2020-10-27 14:42:02,494 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 14:42:02,494 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 879 [2020-10-27 14:42:02,497 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:42:02,497 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:42:02,498 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 23 [2020-10-27 14:42:02,498 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:42:02,498 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-27 14:42:02,633 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:42:02,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:42:02,641 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:42:02,652 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:42:02,652 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:42:02,653 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:42:02,653 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12 [2020-10-27 14:42:02,653 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:42:02,653 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:42:02,654 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:42:02,654 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:42:02,654 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:42:02,664 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-27 14:42:02,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:42:02,667 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:42:02,668 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:42:02,671 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:42:02,671 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 14:42:02,671 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 14:42:02,671 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 14:42:02,672 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:42:02,672 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:42:02,672 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 3 [2020-10-27 14:42:02,672 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:42:02,673 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:42:02,679 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 14:42:02,680 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1425572764] [2020-10-27 14:42:02,682 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 14:42:02,683 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-27 14:42:02,684 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2101433194] [2020-10-27 14:42:02,689 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-27 14:42:02,689 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:42:02,702 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-27 14:42:02,703 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-27 14:42:02,705 INFO L87 Difference]: Start difference. First operand 39 states. Second operand 3 states. [2020-10-27 14:42:02,874 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:42:02,875 INFO L93 Difference]: Finished difference Result 65 states and 83 transitions. [2020-10-27 14:42:02,876 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-27 14:42:02,878 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 24 [2020-10-27 14:42:02,879 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:42:02,887 INFO L225 Difference]: With dead ends: 65 [2020-10-27 14:42:02,887 INFO L226 Difference]: Without dead ends: 29 [2020-10-27 14:42:02,891 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-27 14:42:02,910 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2020-10-27 14:42:02,933 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2020-10-27 14:42:02,934 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2020-10-27 14:42:02,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 32 transitions. [2020-10-27 14:42:02,938 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 32 transitions. Word has length 24 [2020-10-27 14:42:02,938 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:42:02,938 INFO L481 AbstractCegarLoop]: Abstraction has 29 states and 32 transitions. [2020-10-27 14:42:02,939 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-27 14:42:02,939 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 32 transitions. [2020-10-27 14:42:02,940 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-27 14:42:02,940 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:42:02,940 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] [2020-10-27 14:42:02,941 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-27 14:42:02,941 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:42:02,942 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:42:02,942 INFO L82 PathProgramCache]: Analyzing trace with hash 1793608214, now seen corresponding path program 1 times [2020-10-27 14:42:02,942 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:42:02,942 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1510885239] [2020-10-27 14:42:02,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:42:02,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:42:02,970 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:42:02,988 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:42:03,004 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:42:03,436 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:42:03,437 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 36 [2020-10-27 14:42:03,437 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 14:42:03,437 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 475 [2020-10-27 14:42:03,437 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:42:03,438 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-27 14:42:03,438 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-27 14:42:03,438 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-27 14:42:03,438 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:42:03,498 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:42:03,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:42:03,504 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:42:03,509 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:42:03,509 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:42:03,509 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:42:03,509 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-27 14:42:03,510 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:42:03,510 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:42:03,510 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:42:03,510 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:42:03,510 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:42:03,514 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-27 14:42:03,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:42:03,518 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:42:03,521 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:42:03,521 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 14:42:03,521 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:42:03,521 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 14:42:03,522 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:42:03,522 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 14:42:03,522 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:42:03,522 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-27 14:42:03,522 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:42:03,525 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 14:42:03,526 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1510885239] [2020-10-27 14:42:03,526 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 14:42:03,526 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-27 14:42:03,527 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1725257560] [2020-10-27 14:42:03,528 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-27 14:42:03,529 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:42:03,529 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-27 14:42:03,530 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-27 14:42:03,530 INFO L87 Difference]: Start difference. First operand 29 states and 32 transitions. Second operand 5 states. [2020-10-27 14:42:03,706 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:42:03,707 INFO L93 Difference]: Finished difference Result 46 states and 54 transitions. [2020-10-27 14:42:03,707 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-27 14:42:03,707 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 24 [2020-10-27 14:42:03,708 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:42:03,709 INFO L225 Difference]: With dead ends: 46 [2020-10-27 14:42:03,709 INFO L226 Difference]: Without dead ends: 32 [2020-10-27 14:42:03,710 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-27 14:42:03,711 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2020-10-27 14:42:03,718 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2020-10-27 14:42:03,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2020-10-27 14:42:03,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 35 transitions. [2020-10-27 14:42:03,720 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 35 transitions. Word has length 24 [2020-10-27 14:42:03,720 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:42:03,720 INFO L481 AbstractCegarLoop]: Abstraction has 32 states and 35 transitions. [2020-10-27 14:42:03,720 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-27 14:42:03,721 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 35 transitions. [2020-10-27 14:42:03,721 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-10-27 14:42:03,722 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:42:03,722 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] [2020-10-27 14:42:03,722 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-27 14:42:03,722 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:42:03,723 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:42:03,723 INFO L82 PathProgramCache]: Analyzing trace with hash -2090381425, now seen corresponding path program 1 times [2020-10-27 14:42:03,723 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:42:03,724 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [444551114] [2020-10-27 14:42:03,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:42:03,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:42:03,797 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:42:03,903 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:42:04,291 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:42:04,490 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:42:04,790 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:42:04,852 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:42:04,969 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:42:05,402 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:42:07,341 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:42:07,344 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 43 [2020-10-27 14:42:07,344 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-27 14:42:07,344 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3591 [2020-10-27 14:42:07,344 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:42:07,344 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-27 14:42:07,344 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-27 14:42:07,345 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 19 [2020-10-27 14:42:07,345 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:42:07,736 WARN L193 SmtUtils]: Spent 216.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 41 [2020-10-27 14:42:07,904 WARN L193 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 39 [2020-10-27 14:42:08,368 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:42:08,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:42:08,373 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:42:08,379 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:42:08,379 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:42:08,380 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:42:08,380 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-27 14:42:08,380 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:42:08,380 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:42:08,380 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:42:08,380 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:42:08,381 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:42:08,384 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-27 14:42:08,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:42:08,386 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:42:08,387 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:42:08,388 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 14:42:08,388 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:42:08,388 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-27 14:42:08,388 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:42:08,389 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:42:08,389 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:42:08,389 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:42:08,389 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:42:08,398 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 14:42:08,399 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [444551114] [2020-10-27 14:42:08,399 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:42:08,399 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-27 14:42:08,399 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1127401432] [2020-10-27 14:42:08,400 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-27 14:42:08,400 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:42:08,401 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-27 14:42:08,402 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=205, Unknown=0, NotChecked=0, Total=240 [2020-10-27 14:42:08,402 INFO L87 Difference]: Start difference. First operand 32 states and 35 transitions. Second operand 16 states. [2020-10-27 14:42:09,277 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 41 [2020-10-27 14:42:10,103 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:42:10,103 INFO L93 Difference]: Finished difference Result 53 states and 60 transitions. [2020-10-27 14:42:10,104 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-27 14:42:10,104 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 31 [2020-10-27 14:42:10,105 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:42:10,105 INFO L225 Difference]: With dead ends: 53 [2020-10-27 14:42:10,106 INFO L226 Difference]: Without dead ends: 46 [2020-10-27 14:42:10,107 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 151 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=161, Invalid=769, Unknown=0, NotChecked=0, Total=930 [2020-10-27 14:42:10,108 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2020-10-27 14:42:10,116 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 37. [2020-10-27 14:42:10,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2020-10-27 14:42:10,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 41 transitions. [2020-10-27 14:42:10,118 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 41 transitions. Word has length 31 [2020-10-27 14:42:10,118 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:42:10,118 INFO L481 AbstractCegarLoop]: Abstraction has 37 states and 41 transitions. [2020-10-27 14:42:10,118 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-27 14:42:10,118 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 41 transitions. [2020-10-27 14:42:10,119 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-10-27 14:42:10,120 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:42:10,120 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] [2020-10-27 14:42:10,120 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-27 14:42:10,120 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:42:10,121 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:42:10,121 INFO L82 PathProgramCache]: Analyzing trace with hash 1617779857, now seen corresponding path program 1 times [2020-10-27 14:42:10,121 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:42:10,121 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [311759925] [2020-10-27 14:42:10,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:42:10,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:42:10,145 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:42:10,173 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:42:10,210 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:42:10,927 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:42:11,645 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:42:11,645 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 43 [2020-10-27 14:42:11,646 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 14:42:11,646 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1508 [2020-10-27 14:42:11,646 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:42:11,646 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-27 14:42:11,646 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 21 [2020-10-27 14:42:11,647 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-27 14:42:11,647 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:42:11,856 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:42:11,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:42:11,860 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:42:11,864 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:42:11,864 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:42:11,864 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:42:11,864 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 14:42:11,865 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:42:11,865 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:42:11,865 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:42:11,865 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:42:11,865 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:42:11,868 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-27 14:42:11,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:42:11,872 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:42:11,875 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:42:11,875 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 14:42:11,876 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:42:11,876 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 14:42:11,876 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:42:11,876 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:42:11,876 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:42:11,877 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:42:11,877 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:42:11,883 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 14:42:11,883 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [311759925] [2020-10-27 14:42:11,884 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:42:11,884 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-27 14:42:11,884 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [110688187] [2020-10-27 14:42:11,885 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-27 14:42:11,885 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:42:11,886 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-27 14:42:11,886 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2020-10-27 14:42:11,887 INFO L87 Difference]: Start difference. First operand 37 states and 41 transitions. Second operand 11 states. [2020-10-27 14:42:12,341 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:42:12,341 INFO L93 Difference]: Finished difference Result 67 states and 75 transitions. [2020-10-27 14:42:12,341 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-27 14:42:12,341 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 31 [2020-10-27 14:42:12,342 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:42:12,343 INFO L225 Difference]: With dead ends: 67 [2020-10-27 14:42:12,343 INFO L226 Difference]: Without dead ends: 60 [2020-10-27 14:42:12,344 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=68, Invalid=204, Unknown=0, NotChecked=0, Total=272 [2020-10-27 14:42:12,345 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2020-10-27 14:42:12,353 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 41. [2020-10-27 14:42:12,353 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2020-10-27 14:42:12,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 48 transitions. [2020-10-27 14:42:12,354 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 48 transitions. Word has length 31 [2020-10-27 14:42:12,355 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:42:12,355 INFO L481 AbstractCegarLoop]: Abstraction has 41 states and 48 transitions. [2020-10-27 14:42:12,355 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-27 14:42:12,355 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 48 transitions. [2020-10-27 14:42:12,356 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-10-27 14:42:12,356 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:42:12,356 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] [2020-10-27 14:42:12,356 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-27 14:42:12,357 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:42:12,357 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:42:12,357 INFO L82 PathProgramCache]: Analyzing trace with hash -1912294515, now seen corresponding path program 2 times [2020-10-27 14:42:12,357 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:42:12,358 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [782993766] [2020-10-27 14:42:12,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:42:12,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:42:12,380 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:42:12,403 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:42:13,183 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:42:13,183 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 45 [2020-10-27 14:42:13,183 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 14:42:13,184 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 811 [2020-10-27 14:42:13,184 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:42:13,184 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-27 14:42:13,184 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 24 [2020-10-27 14:42:13,184 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 9 [2020-10-27 14:42:13,184 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:42:13,268 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:42:13,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:42:13,272 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:42:13,275 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:42:13,276 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:42:13,276 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:42:13,276 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 14:42:13,276 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:42:13,276 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:42:13,276 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:42:13,277 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:42:13,277 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:42:13,281 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-27 14:42:13,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:42:13,285 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:42:13,286 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:42:13,286 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 14:42:13,286 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:42:13,286 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-27 14:42:13,286 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:42:13,287 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:42:13,287 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:42:13,287 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:42:13,287 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:42:13,293 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-27 14:42:13,294 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [782993766] [2020-10-27 14:42:13,295 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:42:13,295 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-27 14:42:13,295 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [498724894] [2020-10-27 14:42:13,296 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-27 14:42:13,296 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:42:13,297 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-27 14:42:13,298 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2020-10-27 14:42:13,298 INFO L87 Difference]: Start difference. First operand 41 states and 48 transitions. Second operand 8 states. [2020-10-27 14:42:13,603 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:42:13,603 INFO L93 Difference]: Finished difference Result 97 states and 117 transitions. [2020-10-27 14:42:13,604 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-27 14:42:13,604 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 33 [2020-10-27 14:42:13,604 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:42:13,606 INFO L225 Difference]: With dead ends: 97 [2020-10-27 14:42:13,606 INFO L226 Difference]: Without dead ends: 64 [2020-10-27 14:42:13,607 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2020-10-27 14:42:13,608 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2020-10-27 14:42:13,622 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 47. [2020-10-27 14:42:13,622 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2020-10-27 14:42:13,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 54 transitions. [2020-10-27 14:42:13,625 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 54 transitions. Word has length 33 [2020-10-27 14:42:13,625 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:42:13,625 INFO L481 AbstractCegarLoop]: Abstraction has 47 states and 54 transitions. [2020-10-27 14:42:13,625 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-27 14:42:13,626 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 54 transitions. [2020-10-27 14:42:13,631 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-10-27 14:42:13,631 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:42:13,631 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] [2020-10-27 14:42:13,631 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-27 14:42:13,632 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:42:13,632 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:42:13,632 INFO L82 PathProgramCache]: Analyzing trace with hash 234001266, now seen corresponding path program 1 times [2020-10-27 14:42:13,633 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:42:13,633 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1831110659] [2020-10-27 14:42:13,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:42:13,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:42:13,662 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:42:13,687 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:42:13,725 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:42:13,899 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:42:14,477 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:42:14,653 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:42:15,301 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:42:18,234 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:42:18,234 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 48 [2020-10-27 14:42:18,234 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-27 14:42:18,234 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4580 [2020-10-27 14:42:18,235 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:42:18,235 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-27 14:42:18,235 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 26 [2020-10-27 14:42:18,235 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-27 14:42:18,236 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:42:18,317 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:42:18,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:42:18,320 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:42:18,325 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:42:18,325 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:42:18,325 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:42:18,326 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-27 14:42:18,326 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:42:18,326 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:42:18,326 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:42:18,326 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:42:18,326 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:42:18,330 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-27 14:42:18,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:42:18,331 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:42:18,332 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:42:18,333 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 14:42:18,333 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:42:18,333 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-27 14:42:18,333 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:42:18,333 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:42:18,334 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:42:18,334 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:42:18,334 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:42:18,338 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-27 14:42:18,338 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1831110659] [2020-10-27 14:42:18,340 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:42:18,340 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-27 14:42:18,341 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1457780450] [2020-10-27 14:42:18,342 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-27 14:42:18,342 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:42:18,343 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-27 14:42:18,343 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2020-10-27 14:42:18,343 INFO L87 Difference]: Start difference. First operand 47 states and 54 transitions. Second operand 8 states. [2020-10-27 14:42:18,616 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:42:18,616 INFO L93 Difference]: Finished difference Result 57 states and 64 transitions. [2020-10-27 14:42:18,619 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-27 14:42:18,619 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 36 [2020-10-27 14:42:18,619 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:42:18,622 INFO L225 Difference]: With dead ends: 57 [2020-10-27 14:42:18,622 INFO L226 Difference]: Without dead ends: 50 [2020-10-27 14:42:18,623 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=43, Invalid=113, Unknown=0, NotChecked=0, Total=156 [2020-10-27 14:42:18,623 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2020-10-27 14:42:18,635 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 39. [2020-10-27 14:42:18,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2020-10-27 14:42:18,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 43 transitions. [2020-10-27 14:42:18,637 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 43 transitions. Word has length 36 [2020-10-27 14:42:18,638 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:42:18,638 INFO L481 AbstractCegarLoop]: Abstraction has 39 states and 43 transitions. [2020-10-27 14:42:18,638 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-27 14:42:18,638 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 43 transitions. [2020-10-27 14:42:18,639 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-10-27 14:42:18,639 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:42:18,640 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-10-27 14:42:18,640 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-27 14:42:18,640 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:42:18,640 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:42:18,641 INFO L82 PathProgramCache]: Analyzing trace with hash -283658706, now seen corresponding path program 3 times [2020-10-27 14:42:18,641 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:42:18,643 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [210505165] [2020-10-27 14:42:18,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:42:18,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:42:18,697 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:42:18,878 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:42:19,299 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:42:19,660 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:42:20,147 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:42:20,498 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:42:20,810 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:42:21,164 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:42:21,813 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:42:22,609 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:42:22,797 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:42:23,032 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:42:23,589 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:42:23,699 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:42:23,700 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 50 [2020-10-27 14:42:23,700 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 13 [2020-10-27 14:42:23,700 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5021 [2020-10-27 14:42:23,700 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:42:23,701 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 19 [2020-10-27 14:42:23,701 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-27 14:42:23,701 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-27 14:42:23,701 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:42:24,134 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 44 [2020-10-27 14:42:24,919 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:42:24,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:42:24,923 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:42:24,931 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:42:24,931 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:42:24,931 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:42:24,931 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-27 14:42:24,932 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:42:24,932 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:42:24,932 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:42:24,932 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:42:24,932 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:42:24,935 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-27 14:42:24,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:42:24,937 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:42:24,939 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:42:24,939 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 14:42:24,939 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:42:24,940 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 14:42:24,940 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:42:24,940 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:42:24,940 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:42:24,940 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:42:24,940 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:42:24,954 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-27 14:42:24,955 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [210505165] [2020-10-27 14:42:24,955 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:42:24,955 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-10-27 14:42:24,955 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [597169385] [2020-10-27 14:42:24,956 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-27 14:42:24,956 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:42:24,957 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-27 14:42:24,957 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=336, Unknown=0, NotChecked=0, Total=380 [2020-10-27 14:42:24,957 INFO L87 Difference]: Start difference. First operand 39 states and 43 transitions. Second operand 20 states. [2020-10-27 14:42:25,790 WARN L193 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 46 [2020-10-27 14:42:26,868 WARN L193 SmtUtils]: Spent 229.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 61 [2020-10-27 14:42:27,398 WARN L193 SmtUtils]: Spent 233.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 63 [2020-10-27 14:42:27,828 WARN L193 SmtUtils]: Spent 255.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 66 [2020-10-27 14:42:28,590 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:42:28,591 INFO L93 Difference]: Finished difference Result 63 states and 72 transitions. [2020-10-27 14:42:28,591 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-10-27 14:42:28,591 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 38 [2020-10-27 14:42:28,592 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:42:28,595 INFO L225 Difference]: With dead ends: 63 [2020-10-27 14:42:28,595 INFO L226 Difference]: Without dead ends: 56 [2020-10-27 14:42:28,596 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 294 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=214, Invalid=1592, Unknown=0, NotChecked=0, Total=1806 [2020-10-27 14:42:28,597 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2020-10-27 14:42:28,607 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 47. [2020-10-27 14:42:28,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2020-10-27 14:42:28,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 53 transitions. [2020-10-27 14:42:28,608 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 53 transitions. Word has length 38 [2020-10-27 14:42:28,608 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:42:28,609 INFO L481 AbstractCegarLoop]: Abstraction has 47 states and 53 transitions. [2020-10-27 14:42:28,609 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-27 14:42:28,609 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 53 transitions. [2020-10-27 14:42:28,609 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-10-27 14:42:28,610 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:42:28,610 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] [2020-10-27 14:42:28,610 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-27 14:42:28,610 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:42:28,611 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:42:28,611 INFO L82 PathProgramCache]: Analyzing trace with hash -1563522384, now seen corresponding path program 2 times [2020-10-27 14:42:28,611 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:42:28,611 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [600544903] [2020-10-27 14:42:28,611 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:42:28,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:42:28,641 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:42:28,673 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:42:28,744 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:42:29,371 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:42:30,023 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:42:30,794 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:42:31,282 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:42:32,255 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:42:32,256 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 50 [2020-10-27 14:42:32,256 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-27 14:42:32,258 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3624 [2020-10-27 14:42:32,258 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:42:32,259 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-27 14:42:32,259 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 23 [2020-10-27 14:42:32,259 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-10-27 14:42:32,259 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:42:32,499 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:42:32,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:42:32,503 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:42:32,507 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:42:32,508 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:42:32,508 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:42:32,508 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-27 14:42:32,508 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:42:32,508 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:42:32,509 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:42:32,509 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:42:32,509 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:42:32,511 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-27 14:42:32,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:42:32,513 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:42:32,515 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:42:32,515 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 14:42:32,515 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:42:32,515 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-27 14:42:32,515 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:42:32,516 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:42:32,516 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:42:32,516 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:42:32,516 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:42:32,522 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-27 14:42:32,523 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [600544903] [2020-10-27 14:42:32,523 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:42:32,523 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-27 14:42:32,523 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1281602000] [2020-10-27 14:42:32,524 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-27 14:42:32,524 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:42:32,525 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-27 14:42:32,525 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2020-10-27 14:42:32,525 INFO L87 Difference]: Start difference. First operand 47 states and 53 transitions. Second operand 13 states. [2020-10-27 14:42:33,394 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:42:33,395 INFO L93 Difference]: Finished difference Result 72 states and 80 transitions. [2020-10-27 14:42:33,395 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-27 14:42:33,395 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 38 [2020-10-27 14:42:33,396 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:42:33,397 INFO L225 Difference]: With dead ends: 72 [2020-10-27 14:42:33,397 INFO L226 Difference]: Without dead ends: 65 [2020-10-27 14:42:33,398 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=122, Invalid=478, Unknown=0, NotChecked=0, Total=600 [2020-10-27 14:42:33,399 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2020-10-27 14:42:33,409 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 50. [2020-10-27 14:42:33,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-10-27 14:42:33,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 58 transitions. [2020-10-27 14:42:33,410 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 58 transitions. Word has length 38 [2020-10-27 14:42:33,411 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:42:33,411 INFO L481 AbstractCegarLoop]: Abstraction has 50 states and 58 transitions. [2020-10-27 14:42:33,411 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-27 14:42:33,411 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 58 transitions. [2020-10-27 14:42:33,412 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-10-27 14:42:33,412 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:42:33,412 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] [2020-10-27 14:42:33,412 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-27 14:42:33,412 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:42:33,413 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:42:33,413 INFO L82 PathProgramCache]: Analyzing trace with hash 2017163884, now seen corresponding path program 3 times [2020-10-27 14:42:33,413 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:42:33,413 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1650791458] [2020-10-27 14:42:33,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:42:33,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:42:33,460 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:42:33,507 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:42:33,554 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:42:33,841 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:42:34,314 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:42:34,699 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:42:36,669 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:42:36,669 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 50 [2020-10-27 14:42:36,670 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-27 14:42:36,670 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3226 [2020-10-27 14:42:36,670 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:42:36,670 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-27 14:42:36,670 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 21 [2020-10-27 14:42:36,670 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 13 [2020-10-27 14:42:36,670 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:42:36,962 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:42:36,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:42:36,966 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:42:36,970 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:42:36,971 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:42:36,971 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:42:36,971 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-27 14:42:36,971 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:42:36,971 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:42:36,972 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:42:36,972 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:42:36,972 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:42:36,975 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-27 14:42:36,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:42:36,976 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:42:36,978 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:42:36,978 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 14:42:36,978 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:42:36,978 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-27 14:42:36,978 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:42:36,979 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:42:36,979 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:42:36,979 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:42:36,979 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:42:36,984 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-27 14:42:36,985 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1650791458] [2020-10-27 14:42:36,985 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:42:36,985 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-27 14:42:36,985 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1156534333] [2020-10-27 14:42:36,986 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-27 14:42:36,986 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:42:36,986 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-27 14:42:36,987 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2020-10-27 14:42:36,987 INFO L87 Difference]: Start difference. First operand 50 states and 58 transitions. Second operand 12 states. [2020-10-27 14:42:37,594 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:42:37,595 INFO L93 Difference]: Finished difference Result 74 states and 87 transitions. [2020-10-27 14:42:37,595 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-27 14:42:37,595 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 38 [2020-10-27 14:42:37,596 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:42:37,596 INFO L225 Difference]: With dead ends: 74 [2020-10-27 14:42:37,596 INFO L226 Difference]: Without dead ends: 58 [2020-10-27 14:42:37,597 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=98, Invalid=322, Unknown=0, NotChecked=0, Total=420 [2020-10-27 14:42:37,598 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2020-10-27 14:42:37,611 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 58. [2020-10-27 14:42:37,611 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-10-27 14:42:37,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 68 transitions. [2020-10-27 14:42:37,614 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 68 transitions. Word has length 38 [2020-10-27 14:42:37,614 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:42:37,614 INFO L481 AbstractCegarLoop]: Abstraction has 58 states and 68 transitions. [2020-10-27 14:42:37,614 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-27 14:42:37,614 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 68 transitions. [2020-10-27 14:42:37,622 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-10-27 14:42:37,622 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:42:37,623 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:42:37,623 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-27 14:42:37,623 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:42:37,624 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:42:37,624 INFO L82 PathProgramCache]: Analyzing trace with hash -818549140, now seen corresponding path program 4 times [2020-10-27 14:42:37,624 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:42:37,624 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [412991094] [2020-10-27 14:42:37,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:42:37,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:42:37,646 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:42:37,699 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:42:38,679 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:42:38,679 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 52 [2020-10-27 14:42:38,679 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 14:42:38,680 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1039 [2020-10-27 14:42:38,680 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:42:38,680 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-27 14:42:38,681 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 26 [2020-10-27 14:42:38,681 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-27 14:42:38,681 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 14:42:38,781 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:42:38,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:42:38,784 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:42:38,788 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:42:38,788 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:42:38,788 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:42:38,788 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 14:42:38,788 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:42:38,789 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:42:38,789 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:42:38,789 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:42:38,789 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:42:38,792 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-27 14:42:38,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:42:38,793 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:42:38,795 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:42:38,795 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 14:42:38,795 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:42:38,795 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-27 14:42:38,795 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:42:38,796 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:42:38,796 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:42:38,796 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:42:38,796 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:42:38,800 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 9 proven. 5 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-27 14:42:38,800 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [412991094] [2020-10-27 14:42:38,800 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:42:38,801 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-27 14:42:38,801 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [800010688] [2020-10-27 14:42:38,801 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-27 14:42:38,801 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:42:38,802 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-27 14:42:38,802 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2020-10-27 14:42:38,802 INFO L87 Difference]: Start difference. First operand 58 states and 68 transitions. Second operand 10 states. [2020-10-27 14:42:39,187 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:42:39,188 INFO L93 Difference]: Finished difference Result 135 states and 160 transitions. [2020-10-27 14:42:39,188 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-27 14:42:39,188 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 40 [2020-10-27 14:42:39,189 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:42:39,190 INFO L225 Difference]: With dead ends: 135 [2020-10-27 14:42:39,190 INFO L226 Difference]: Without dead ends: 85 [2020-10-27 14:42:39,192 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182 [2020-10-27 14:42:39,192 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2020-10-27 14:42:39,204 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 58. [2020-10-27 14:42:39,205 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-10-27 14:42:39,206 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 67 transitions. [2020-10-27 14:42:39,206 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 67 transitions. Word has length 40 [2020-10-27 14:42:39,206 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:42:39,206 INFO L481 AbstractCegarLoop]: Abstraction has 58 states and 67 transitions. [2020-10-27 14:42:39,206 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-27 14:42:39,206 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 67 transitions. [2020-10-27 14:42:39,207 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-10-27 14:42:39,207 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:42:39,207 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-10-27 14:42:39,207 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-27 14:42:39,208 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:42:39,208 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:42:39,208 INFO L82 PathProgramCache]: Analyzing trace with hash 451576945, now seen corresponding path program 5 times [2020-10-27 14:42:39,208 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:42:39,209 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1298352966] [2020-10-27 14:42:39,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:42:39,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:42:39,228 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:42:39,285 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:42:39,300 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:42:39,395 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:42:39,525 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:42:39,566 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:42:39,702 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:42:39,815 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:42:40,161 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:42:40,207 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:42:40,294 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:42:40,413 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:42:41,155 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:42:41,285 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:42:41,505 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:42:41,572 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:42:42,694 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:42:42,926 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:42:43,835 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:42:44,024 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:42:44,226 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:42:44,226 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 55 [2020-10-27 14:42:44,226 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 20 [2020-10-27 14:42:44,226 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-27 14:42:44,226 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:42:44,226 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-27 14:42:44,226 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 28 [2020-10-27 14:42:44,227 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-10-27 14:42:44,227 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:42:44,427 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:42:44,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:42:44,431 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:42:44,435 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:42:44,436 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:42:44,436 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:42:44,436 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-27 14:42:44,436 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:42:44,436 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:42:44,436 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:42:44,436 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:42:44,436 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:42:44,439 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-27 14:42:44,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:42:44,443 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:42:44,444 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:42:44,444 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 14:42:44,444 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:42:44,444 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-27 14:42:44,444 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:42:44,444 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:42:44,445 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:42:44,445 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:42:44,445 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:42:44,459 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 2 proven. 14 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-10-27 14:42:44,459 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1298352966] [2020-10-27 14:42:44,459 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:42:44,459 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-27 14:42:44,460 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1332563043] [2020-10-27 14:42:44,460 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-27 14:42:44,460 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:42:44,461 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-27 14:42:44,461 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2020-10-27 14:42:44,461 INFO L87 Difference]: Start difference. First operand 58 states and 67 transitions. Second operand 14 states. [2020-10-27 14:42:45,164 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:42:45,164 INFO L93 Difference]: Finished difference Result 98 states and 112 transitions. [2020-10-27 14:42:45,165 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-27 14:42:45,165 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 43 [2020-10-27 14:42:45,165 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:42:45,166 INFO L225 Difference]: With dead ends: 98 [2020-10-27 14:42:45,166 INFO L226 Difference]: Without dead ends: 91 [2020-10-27 14:42:45,167 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 122 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=192, Invalid=510, Unknown=0, NotChecked=0, Total=702 [2020-10-27 14:42:45,167 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2020-10-27 14:42:45,179 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 49. [2020-10-27 14:42:45,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2020-10-27 14:42:45,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 55 transitions. [2020-10-27 14:42:45,181 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 55 transitions. Word has length 43 [2020-10-27 14:42:45,184 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:42:45,184 INFO L481 AbstractCegarLoop]: Abstraction has 49 states and 55 transitions. [2020-10-27 14:42:45,184 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-27 14:42:45,184 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 55 transitions. [2020-10-27 14:42:45,186 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-10-27 14:42:45,187 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:42:45,187 INFO L422 BasicCegarLoop]: trace histogram [3, 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] [2020-10-27 14:42:45,187 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-27 14:42:45,187 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:42:45,188 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:42:45,188 INFO L82 PathProgramCache]: Analyzing trace with hash 1368274927, now seen corresponding path program 6 times [2020-10-27 14:42:45,188 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:42:45,188 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1602547345] [2020-10-27 14:42:45,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:42:45,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:42:45,222 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:42:45,453 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:42:45,923 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:42:46,290 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:42:46,700 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:42:47,003 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:42:47,350 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:42:47,621 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:42:47,982 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:42:48,275 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:42:48,886 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:42:49,276 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:42:49,938 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:42:50,163 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:42:50,248 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:42:50,248 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 57 [2020-10-27 14:42:50,248 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 14 [2020-10-27 14:42:50,248 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5036 [2020-10-27 14:42:50,249 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:42:50,249 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 25 [2020-10-27 14:42:50,249 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-27 14:42:50,249 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 33 [2020-10-27 14:42:50,249 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:42:51,376 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 43 [2020-10-27 14:42:51,641 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 46 [2020-10-27 14:42:52,608 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:42:52,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:42:52,615 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:42:52,619 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:42:52,619 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:42:52,619 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:42:52,620 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 14:42:52,620 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:42:52,620 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:42:52,620 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:42:52,620 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:42:52,620 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:42:52,623 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-27 14:42:52,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:42:52,625 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:42:52,626 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:42:52,626 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 14:42:52,627 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:42:52,627 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-27 14:42:52,627 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:42:52,627 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:42:52,627 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:42:52,627 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:42:52,627 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:42:52,649 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 14:42:52,650 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1602547345] [2020-10-27 14:42:52,650 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:42:52,650 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2020-10-27 14:42:52,650 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1480473565] [2020-10-27 14:42:52,651 INFO L461 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-10-27 14:42:52,651 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:42:52,652 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-10-27 14:42:52,652 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=622, Unknown=0, NotChecked=0, Total=702 [2020-10-27 14:42:52,653 INFO L87 Difference]: Start difference. First operand 49 states and 55 transitions. Second operand 27 states. [2020-10-27 14:42:54,022 WARN L193 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 57 [2020-10-27 14:42:54,412 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 53 [2020-10-27 14:42:54,907 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 50 [2020-10-27 14:42:55,166 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 51 [2020-10-27 14:42:55,699 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:42:55,700 INFO L93 Difference]: Finished difference Result 92 states and 107 transitions. [2020-10-27 14:42:55,700 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-10-27 14:42:55,701 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 45 [2020-10-27 14:42:55,701 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:42:55,702 INFO L225 Difference]: With dead ends: 92 [2020-10-27 14:42:55,702 INFO L226 Difference]: Without dead ends: 85 [2020-10-27 14:42:55,704 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 421 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=237, Invalid=1925, Unknown=0, NotChecked=0, Total=2162 [2020-10-27 14:42:55,704 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2020-10-27 14:42:55,717 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 65. [2020-10-27 14:42:55,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2020-10-27 14:42:55,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 76 transitions. [2020-10-27 14:42:55,719 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 76 transitions. Word has length 45 [2020-10-27 14:42:55,719 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:42:55,719 INFO L481 AbstractCegarLoop]: Abstraction has 65 states and 76 transitions. [2020-10-27 14:42:55,719 INFO L482 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-10-27 14:42:55,720 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 76 transitions. [2020-10-27 14:42:55,720 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-10-27 14:42:55,720 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:42:55,721 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 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] [2020-10-27 14:42:55,721 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-27 14:42:55,721 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:42:55,722 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:42:55,722 INFO L82 PathProgramCache]: Analyzing trace with hash -220072975, now seen corresponding path program 4 times [2020-10-27 14:42:55,722 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:42:55,722 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1152484172] [2020-10-27 14:42:55,722 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:42:55,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:42:55,754 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:42:55,821 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:42:55,852 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:42:55,986 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:42:56,346 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:42:56,756 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:42:57,696 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:42:57,846 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:42:58,226 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:42:59,819 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:43:00,265 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:43:00,473 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:43:00,742 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:43:00,742 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 57 [2020-10-27 14:43:00,742 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 12 [2020-10-27 14:43:00,743 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4999 [2020-10-27 14:43:00,743 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:43:00,743 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-27 14:43:00,743 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 25 [2020-10-27 14:43:00,743 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-27 14:43:00,743 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:43:01,034 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:43:01,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:43:01,038 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:43:01,040 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:43:01,040 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:43:01,040 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:43:01,041 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 14:43:01,041 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:43:01,041 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:43:01,041 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:43:01,041 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:43:01,041 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:43:01,043 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-27 14:43:01,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:43:01,045 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:43:01,046 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:43:01,046 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 14:43:01,046 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:43:01,046 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-27 14:43:01,047 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:43:01,047 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:43:01,047 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:43:01,047 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:43:01,047 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:43:01,051 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 5 proven. 11 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2020-10-27 14:43:01,052 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1152484172] [2020-10-27 14:43:01,052 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:43:01,052 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-27 14:43:01,052 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1163206907] [2020-10-27 14:43:01,053 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-27 14:43:01,053 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:43:01,053 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-27 14:43:01,054 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2020-10-27 14:43:01,054 INFO L87 Difference]: Start difference. First operand 65 states and 76 transitions. Second operand 11 states. [2020-10-27 14:43:01,418 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:43:01,418 INFO L93 Difference]: Finished difference Result 84 states and 96 transitions. [2020-10-27 14:43:01,419 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-27 14:43:01,419 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 45 [2020-10-27 14:43:01,419 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:43:01,420 INFO L225 Difference]: With dead ends: 84 [2020-10-27 14:43:01,420 INFO L226 Difference]: Without dead ends: 69 [2020-10-27 14:43:01,421 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 5 SyntacticMatches, 2 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=82, Invalid=190, Unknown=0, NotChecked=0, Total=272 [2020-10-27 14:43:01,421 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2020-10-27 14:43:01,438 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 65. [2020-10-27 14:43:01,438 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2020-10-27 14:43:01,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 76 transitions. [2020-10-27 14:43:01,444 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 76 transitions. Word has length 45 [2020-10-27 14:43:01,446 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:43:01,446 INFO L481 AbstractCegarLoop]: Abstraction has 65 states and 76 transitions. [2020-10-27 14:43:01,446 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-27 14:43:01,446 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 76 transitions. [2020-10-27 14:43:01,447 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-10-27 14:43:01,447 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:43:01,447 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 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] [2020-10-27 14:43:01,447 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-27 14:43:01,447 INFO L429 AbstractCegarLoop]: === Iteration 14 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:43:01,450 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:43:01,450 INFO L82 PathProgramCache]: Analyzing trace with hash 550626477, now seen corresponding path program 5 times [2020-10-27 14:43:01,450 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:43:01,450 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [217466741] [2020-10-27 14:43:01,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:43:01,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:43:01,497 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:43:01,554 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:43:01,600 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:43:02,182 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:43:02,398 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:43:02,453 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:43:02,497 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:43:02,832 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:43:04,976 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:43:05,080 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:43:05,704 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:43:06,268 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:43:06,310 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:43:06,488 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:43:06,488 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 57 [2020-10-27 14:43:06,488 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 13 [2020-10-27 14:43:06,488 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-27 14:43:06,488 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:43:06,488 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-27 14:43:06,488 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 23 [2020-10-27 14:43:06,488 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-27 14:43:06,488 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:43:06,789 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:43:06,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:43:06,792 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:43:06,796 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:43:06,796 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:43:06,796 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:43:06,796 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 14:43:06,796 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:43:06,796 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:43:06,797 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:43:06,797 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:43:06,797 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:43:06,799 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-27 14:43:06,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:43:06,800 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:43:06,801 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:43:06,801 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 14:43:06,801 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:43:06,801 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-27 14:43:06,802 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:43:06,802 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:43:06,802 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:43:06,802 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:43:06,802 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:43:06,808 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 7 proven. 13 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2020-10-27 14:43:06,808 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [217466741] [2020-10-27 14:43:06,809 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:43:06,809 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-27 14:43:06,809 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [149807997] [2020-10-27 14:43:06,809 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-27 14:43:06,809 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:43:06,810 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-27 14:43:06,810 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2020-10-27 14:43:06,810 INFO L87 Difference]: Start difference. First operand 65 states and 76 transitions. Second operand 14 states. [2020-10-27 14:43:07,659 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:43:07,659 INFO L93 Difference]: Finished difference Result 90 states and 104 transitions. [2020-10-27 14:43:07,660 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-27 14:43:07,660 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 45 [2020-10-27 14:43:07,661 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:43:07,662 INFO L225 Difference]: With dead ends: 90 [2020-10-27 14:43:07,662 INFO L226 Difference]: Without dead ends: 75 [2020-10-27 14:43:07,663 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 119 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=148, Invalid=502, Unknown=0, NotChecked=0, Total=650 [2020-10-27 14:43:07,664 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2020-10-27 14:43:07,676 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 71. [2020-10-27 14:43:07,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2020-10-27 14:43:07,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 84 transitions. [2020-10-27 14:43:07,677 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 84 transitions. Word has length 45 [2020-10-27 14:43:07,677 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:43:07,677 INFO L481 AbstractCegarLoop]: Abstraction has 71 states and 84 transitions. [2020-10-27 14:43:07,677 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-27 14:43:07,678 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 84 transitions. [2020-10-27 14:43:07,678 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-10-27 14:43:07,678 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:43:07,678 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 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] [2020-10-27 14:43:07,678 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-27 14:43:07,679 INFO L429 AbstractCegarLoop]: === Iteration 15 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:43:07,679 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:43:07,679 INFO L82 PathProgramCache]: Analyzing trace with hash -437163407, now seen corresponding path program 6 times [2020-10-27 14:43:07,679 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:43:07,680 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1224030314] [2020-10-27 14:43:07,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:43:07,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:43:07,701 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:43:07,735 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:43:07,817 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:43:07,994 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:43:08,095 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:43:08,216 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:43:08,310 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:43:08,929 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:43:12,327 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:43:12,327 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 57 [2020-10-27 14:43:12,327 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-27 14:43:12,327 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4634 [2020-10-27 14:43:12,327 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:43:12,328 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-27 14:43:12,328 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 21 [2020-10-27 14:43:12,328 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-27 14:43:12,328 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:43:12,789 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:43:12,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:43:12,792 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:43:12,795 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:43:12,795 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:43:12,795 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:43:12,795 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 14:43:12,795 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:43:12,795 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:43:12,795 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:43:12,795 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:43:12,796 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:43:12,797 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-27 14:43:12,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:43:12,799 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:43:12,799 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:43:12,799 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 14:43:12,799 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:43:12,800 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-27 14:43:12,800 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:43:12,800 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:43:12,800 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:43:12,800 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:43:12,800 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:43:12,805 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 6 proven. 15 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-10-27 14:43:12,805 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1224030314] [2020-10-27 14:43:12,805 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:43:12,805 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-27 14:43:12,806 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [390409187] [2020-10-27 14:43:12,806 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-27 14:43:12,806 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:43:12,807 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-27 14:43:12,807 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2020-10-27 14:43:12,807 INFO L87 Difference]: Start difference. First operand 71 states and 84 transitions. Second operand 15 states. [2020-10-27 14:43:13,699 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:43:13,699 INFO L93 Difference]: Finished difference Result 90 states and 104 transitions. [2020-10-27 14:43:13,701 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-27 14:43:13,701 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 45 [2020-10-27 14:43:13,701 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:43:13,702 INFO L225 Difference]: With dead ends: 90 [2020-10-27 14:43:13,702 INFO L226 Difference]: Without dead ends: 75 [2020-10-27 14:43:13,703 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=125, Invalid=475, Unknown=0, NotChecked=0, Total=600 [2020-10-27 14:43:13,704 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2020-10-27 14:43:13,722 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 66. [2020-10-27 14:43:13,722 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-10-27 14:43:13,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 77 transitions. [2020-10-27 14:43:13,723 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 77 transitions. Word has length 45 [2020-10-27 14:43:13,723 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:43:13,723 INFO L481 AbstractCegarLoop]: Abstraction has 66 states and 77 transitions. [2020-10-27 14:43:13,723 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-27 14:43:13,723 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 77 transitions. [2020-10-27 14:43:13,724 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-10-27 14:43:13,724 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:43:13,724 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:43:13,724 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-27 14:43:13,724 INFO L429 AbstractCegarLoop]: === Iteration 16 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:43:13,725 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:43:13,725 INFO L82 PathProgramCache]: Analyzing trace with hash 1846739949, now seen corresponding path program 7 times [2020-10-27 14:43:13,725 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:43:13,726 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [211440094] [2020-10-27 14:43:13,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:43:13,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:43:13,753 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:43:13,812 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:43:15,240 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:43:15,240 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 59 [2020-10-27 14:43:15,241 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 14:43:15,241 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1494 [2020-10-27 14:43:15,241 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:43:15,241 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-27 14:43:15,241 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 28 [2020-10-27 14:43:15,241 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 19 [2020-10-27 14:43:15,241 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:43:15,361 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:43:15,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:43:15,364 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:43:15,368 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:43:15,368 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:43:15,369 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:43:15,369 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 14:43:15,369 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:43:15,369 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:43:15,369 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:43:15,369 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:43:15,369 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:43:15,372 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-27 14:43:15,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:43:15,374 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:43:15,376 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:43:15,376 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 14:43:15,377 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:43:15,377 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 14:43:15,377 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:43:15,377 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:43:15,378 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:43:15,378 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:43:15,378 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:43:15,385 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 16 proven. 12 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-10-27 14:43:15,385 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [211440094] [2020-10-27 14:43:15,386 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:43:15,386 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-27 14:43:15,386 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [142657599] [2020-10-27 14:43:15,387 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-27 14:43:15,387 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:43:15,387 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-27 14:43:15,387 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2020-10-27 14:43:15,388 INFO L87 Difference]: Start difference. First operand 66 states and 77 transitions. Second operand 12 states. [2020-10-27 14:43:15,937 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:43:15,937 INFO L93 Difference]: Finished difference Result 178 states and 211 transitions. [2020-10-27 14:43:15,938 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-27 14:43:15,938 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 47 [2020-10-27 14:43:15,938 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:43:15,939 INFO L225 Difference]: With dead ends: 178 [2020-10-27 14:43:15,939 INFO L226 Difference]: Without dead ends: 110 [2020-10-27 14:43:15,940 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=69, Invalid=203, Unknown=0, NotChecked=0, Total=272 [2020-10-27 14:43:15,942 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2020-10-27 14:43:15,961 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 70. [2020-10-27 14:43:15,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2020-10-27 14:43:15,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 80 transitions. [2020-10-27 14:43:15,962 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 80 transitions. Word has length 47 [2020-10-27 14:43:15,963 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:43:15,963 INFO L481 AbstractCegarLoop]: Abstraction has 70 states and 80 transitions. [2020-10-27 14:43:15,963 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-27 14:43:15,963 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 80 transitions. [2020-10-27 14:43:15,964 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-10-27 14:43:15,964 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:43:15,964 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:43:15,964 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-27 14:43:15,964 INFO L429 AbstractCegarLoop]: === Iteration 17 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:43:15,965 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:43:15,965 INFO L82 PathProgramCache]: Analyzing trace with hash -1003714415, now seen corresponding path program 8 times [2020-10-27 14:43:15,965 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:43:15,965 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2004931607] [2020-10-27 14:43:15,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:43:15,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:43:15,986 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:43:16,011 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:43:17,005 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:43:17,172 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:43:17,388 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:43:17,842 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:43:18,098 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:43:18,540 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:43:19,017 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:43:19,431 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:43:19,881 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:43:20,057 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:43:20,722 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:43:20,984 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:43:20,984 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 59 [2020-10-27 14:43:20,984 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 13 [2020-10-27 14:43:20,984 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-10-27 14:43:20,985 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:43:20,985 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-27 14:43:20,985 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-27 14:43:20,985 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 21 [2020-10-27 14:43:20,985 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:43:21,115 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:43:21,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:43:21,118 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:43:21,121 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:43:21,121 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:43:21,121 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:43:21,121 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 14:43:21,122 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:43:21,122 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:43:21,122 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:43:21,122 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:43:21,122 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:43:21,125 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-27 14:43:21,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:43:21,127 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:43:21,128 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:43:21,128 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 14:43:21,128 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:43:21,128 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-27 14:43:21,128 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:43:21,129 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:43:21,129 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:43:21,129 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:43:21,129 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:43:21,135 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 9 proven. 19 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-10-27 14:43:21,135 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2004931607] [2020-10-27 14:43:21,135 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:43:21,135 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-27 14:43:21,135 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1743806058] [2020-10-27 14:43:21,136 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-27 14:43:21,136 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:43:21,136 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-27 14:43:21,137 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2020-10-27 14:43:21,137 INFO L87 Difference]: Start difference. First operand 70 states and 80 transitions. Second operand 12 states. [2020-10-27 14:43:21,675 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:43:21,675 INFO L93 Difference]: Finished difference Result 99 states and 113 transitions. [2020-10-27 14:43:21,676 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-27 14:43:21,676 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 47 [2020-10-27 14:43:21,676 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:43:21,677 INFO L225 Difference]: With dead ends: 99 [2020-10-27 14:43:21,677 INFO L226 Difference]: Without dead ends: 84 [2020-10-27 14:43:21,678 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=104, Invalid=316, Unknown=0, NotChecked=0, Total=420 [2020-10-27 14:43:21,678 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2020-10-27 14:43:21,690 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 59. [2020-10-27 14:43:21,690 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2020-10-27 14:43:21,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 67 transitions. [2020-10-27 14:43:21,690 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 67 transitions. Word has length 47 [2020-10-27 14:43:21,691 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:43:21,691 INFO L481 AbstractCegarLoop]: Abstraction has 59 states and 67 transitions. [2020-10-27 14:43:21,691 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-27 14:43:21,691 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 67 transitions. [2020-10-27 14:43:21,691 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-10-27 14:43:21,691 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:43:21,692 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-10-27 14:43:21,692 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-27 14:43:21,692 INFO L429 AbstractCegarLoop]: === Iteration 18 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:43:21,692 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:43:21,692 INFO L82 PathProgramCache]: Analyzing trace with hash -1179539386, now seen corresponding path program 9 times [2020-10-27 14:43:21,692 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:43:21,693 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2071773958] [2020-10-27 14:43:21,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:43:21,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:43:21,733 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:43:22,210 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:43:22,744 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:43:23,252 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:43:23,789 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:43:24,350 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:43:24,884 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:43:25,317 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:43:25,645 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:43:26,160 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:43:26,527 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:43:26,741 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:43:26,742 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 64 [2020-10-27 14:43:26,742 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 11 [2020-10-27 14:43:26,742 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5024 [2020-10-27 14:43:26,742 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:43:26,742 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 30 [2020-10-27 14:43:26,742 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-27 14:43:26,742 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 40 [2020-10-27 14:43:26,743 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:43:27,835 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 43 [2020-10-27 14:43:29,407 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:43:29,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:43:29,410 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:43:29,412 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:43:29,412 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:43:29,412 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:43:29,412 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 14:43:29,412 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:43:29,412 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:43:29,413 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:43:29,413 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:43:29,413 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:43:29,415 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-27 14:43:29,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:43:29,416 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:43:29,417 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:43:29,418 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 14:43:29,418 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:43:29,418 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-27 14:43:29,418 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:43:29,418 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:43:29,418 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:43:29,418 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:43:29,418 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:43:29,456 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 14:43:29,457 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2071773958] [2020-10-27 14:43:29,457 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:43:29,458 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32] total 32 [2020-10-27 14:43:29,458 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [295611053] [2020-10-27 14:43:29,458 INFO L461 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-10-27 14:43:29,458 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:43:29,459 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-10-27 14:43:29,459 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=920, Unknown=0, NotChecked=0, Total=992 [2020-10-27 14:43:29,459 INFO L87 Difference]: Start difference. First operand 59 states and 67 transitions. Second operand 32 states. [2020-10-27 14:43:31,598 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:43:31,598 INFO L93 Difference]: Finished difference Result 95 states and 110 transitions. [2020-10-27 14:43:31,599 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-10-27 14:43:31,599 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 52 [2020-10-27 14:43:31,600 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:43:31,601 INFO L225 Difference]: With dead ends: 95 [2020-10-27 14:43:31,601 INFO L226 Difference]: Without dead ends: 88 [2020-10-27 14:43:31,607 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 206 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=91, Invalid=1169, Unknown=0, NotChecked=0, Total=1260 [2020-10-27 14:43:31,607 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2020-10-27 14:43:31,618 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 78. [2020-10-27 14:43:31,619 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2020-10-27 14:43:31,619 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 92 transitions. [2020-10-27 14:43:31,619 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 92 transitions. Word has length 52 [2020-10-27 14:43:31,620 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:43:31,620 INFO L481 AbstractCegarLoop]: Abstraction has 78 states and 92 transitions. [2020-10-27 14:43:31,620 INFO L482 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-10-27 14:43:31,620 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 92 transitions. [2020-10-27 14:43:31,620 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-10-27 14:43:31,620 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:43:31,621 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 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] [2020-10-27 14:43:31,621 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-27 14:43:31,621 INFO L429 AbstractCegarLoop]: === Iteration 19 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:43:31,621 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:43:31,621 INFO L82 PathProgramCache]: Analyzing trace with hash -960684668, now seen corresponding path program 7 times [2020-10-27 14:43:31,621 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:43:31,622 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1152446306] [2020-10-27 14:43:31,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:43:31,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:43:31,652 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:43:31,702 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:43:31,799 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:43:32,515 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:43:32,566 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:43:32,725 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:43:33,836 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:43:33,990 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:43:34,469 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:43:35,077 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:43:35,277 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:43:35,449 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:43:35,510 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:43:36,656 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:43:36,656 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 64 [2020-10-27 14:43:36,656 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 13 [2020-10-27 14:43:36,656 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5017 [2020-10-27 14:43:36,656 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:43:36,656 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 19 [2020-10-27 14:43:36,656 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 25 [2020-10-27 14:43:36,656 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 27 [2020-10-27 14:43:36,656 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:43:37,373 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:43:37,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:43:37,376 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:43:37,380 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:43:37,381 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:43:37,381 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:43:37,381 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 14:43:37,381 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:43:37,381 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:43:37,381 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:43:37,381 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:43:37,381 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:43:37,384 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-27 14:43:37,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:43:37,385 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:43:37,386 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:43:37,386 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 14:43:37,386 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:43:37,386 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-27 14:43:37,386 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:43:37,387 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:43:37,387 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:43:37,387 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:43:37,387 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:43:37,399 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 27 proven. 23 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-27 14:43:37,399 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1152446306] [2020-10-27 14:43:37,399 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:43:37,399 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-10-27 14:43:37,400 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1907990414] [2020-10-27 14:43:37,403 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-27 14:43:37,404 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:43:37,404 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-27 14:43:37,405 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=317, Unknown=0, NotChecked=0, Total=380 [2020-10-27 14:43:37,405 INFO L87 Difference]: Start difference. First operand 78 states and 92 transitions. Second operand 20 states. [2020-10-27 14:43:38,824 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:43:38,825 INFO L93 Difference]: Finished difference Result 116 states and 135 transitions. [2020-10-27 14:43:38,825 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-27 14:43:38,826 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 52 [2020-10-27 14:43:38,826 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:43:38,827 INFO L225 Difference]: With dead ends: 116 [2020-10-27 14:43:38,827 INFO L226 Difference]: Without dead ends: 99 [2020-10-27 14:43:38,828 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 331 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=278, Invalid=1204, Unknown=0, NotChecked=0, Total=1482 [2020-10-27 14:43:38,828 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2020-10-27 14:43:38,839 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 84. [2020-10-27 14:43:38,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2020-10-27 14:43:38,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 100 transitions. [2020-10-27 14:43:38,840 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 100 transitions. Word has length 52 [2020-10-27 14:43:38,841 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:43:38,841 INFO L481 AbstractCegarLoop]: Abstraction has 84 states and 100 transitions. [2020-10-27 14:43:38,841 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-27 14:43:38,841 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 100 transitions. [2020-10-27 14:43:38,841 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-10-27 14:43:38,842 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:43:38,842 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 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] [2020-10-27 14:43:38,842 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-27 14:43:38,842 INFO L429 AbstractCegarLoop]: === Iteration 20 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:43:38,842 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:43:38,843 INFO L82 PathProgramCache]: Analyzing trace with hash -1038990776, now seen corresponding path program 8 times [2020-10-27 14:43:38,843 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:43:38,843 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1141306968] [2020-10-27 14:43:38,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:43:38,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:43:38,868 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:43:38,929 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:43:39,087 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:43:39,363 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:43:40,870 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:43:40,948 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:43:42,230 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:43:42,293 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:43:42,350 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:43:42,904 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:43:43,437 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:43:43,646 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:43:43,741 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:43:43,861 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:43:43,861 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 64 [2020-10-27 14:43:43,861 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 13 [2020-10-27 14:43:43,861 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-27 14:43:43,861 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:43:43,861 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-27 14:43:43,861 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 23 [2020-10-27 14:43:43,862 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 21 [2020-10-27 14:43:43,862 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:43:44,183 WARN L193 SmtUtils]: Spent 186.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 35 [2020-10-27 14:43:44,389 WARN L193 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 33 [2020-10-27 14:43:44,740 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:43:44,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:43:44,744 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:43:44,747 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:43:44,747 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:43:44,747 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:43:44,747 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 14:43:44,747 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:43:44,747 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:43:44,747 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:43:44,747 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:43:44,747 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:43:44,749 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-27 14:43:44,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:43:44,750 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:43:44,751 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:43:44,751 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 14:43:44,752 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:43:44,752 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-27 14:43:44,752 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:43:44,752 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:43:44,752 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:43:44,752 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:43:44,752 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:43:44,759 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 11 proven. 26 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2020-10-27 14:43:44,760 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1141306968] [2020-10-27 14:43:44,760 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:43:44,760 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-27 14:43:44,760 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1376524234] [2020-10-27 14:43:44,760 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-27 14:43:44,761 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:43:44,761 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-27 14:43:44,761 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=220, Unknown=0, NotChecked=0, Total=272 [2020-10-27 14:43:44,761 INFO L87 Difference]: Start difference. First operand 84 states and 100 transitions. Second operand 17 states. [2020-10-27 14:43:46,173 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:43:46,174 INFO L93 Difference]: Finished difference Result 119 states and 140 transitions. [2020-10-27 14:43:46,174 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-27 14:43:46,174 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 52 [2020-10-27 14:43:46,175 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:43:46,176 INFO L225 Difference]: With dead ends: 119 [2020-10-27 14:43:46,176 INFO L226 Difference]: Without dead ends: 102 [2020-10-27 14:43:46,177 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 202 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=198, Invalid=794, Unknown=0, NotChecked=0, Total=992 [2020-10-27 14:43:46,178 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2020-10-27 14:43:46,191 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 93. [2020-10-27 14:43:46,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2020-10-27 14:43:46,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 112 transitions. [2020-10-27 14:43:46,192 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 112 transitions. Word has length 52 [2020-10-27 14:43:46,192 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:43:46,192 INFO L481 AbstractCegarLoop]: Abstraction has 93 states and 112 transitions. [2020-10-27 14:43:46,192 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-27 14:43:46,192 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 112 transitions. [2020-10-27 14:43:46,193 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-10-27 14:43:46,193 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:43:46,193 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 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] [2020-10-27 14:43:46,193 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-10-27 14:43:46,193 INFO L429 AbstractCegarLoop]: === Iteration 21 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:43:46,193 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:43:46,194 INFO L82 PathProgramCache]: Analyzing trace with hash -1689012476, now seen corresponding path program 9 times [2020-10-27 14:43:46,194 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:43:46,194 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [878928287] [2020-10-27 14:43:46,194 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:43:46,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:43:46,234 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:43:46,304 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:43:46,441 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:43:46,702 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:43:46,973 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:43:47,093 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:43:47,153 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:43:48,183 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:43:50,146 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:43:51,218 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:43:51,218 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 64 [2020-10-27 14:43:51,218 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-27 14:43:51,218 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5009 [2020-10-27 14:43:51,218 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:43:51,219 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-27 14:43:51,219 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 21 [2020-10-27 14:43:51,219 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 33 [2020-10-27 14:43:51,219 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:43:51,569 WARN L193 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 34 [2020-10-27 14:43:51,762 WARN L193 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 38 [2020-10-27 14:43:52,024 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:43:52,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:43:52,027 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:43:52,031 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:43:52,031 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:43:52,031 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:43:52,031 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 14:43:52,031 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:43:52,031 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:43:52,031 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:43:52,032 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:43:52,032 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:43:52,033 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-27 14:43:52,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:43:52,034 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:43:52,035 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:43:52,035 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 14:43:52,035 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:43:52,035 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-27 14:43:52,036 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:43:52,036 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:43:52,036 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:43:52,036 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:43:52,036 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:43:52,045 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 18 proven. 21 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2020-10-27 14:43:52,046 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [878928287] [2020-10-27 14:43:52,046 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:43:52,046 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-10-27 14:43:52,046 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [924219356] [2020-10-27 14:43:52,046 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-27 14:43:52,047 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:43:52,047 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-27 14:43:52,047 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=313, Unknown=0, NotChecked=0, Total=380 [2020-10-27 14:43:52,047 INFO L87 Difference]: Start difference. First operand 93 states and 112 transitions. Second operand 20 states. [2020-10-27 14:43:52,650 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 45 [2020-10-27 14:43:53,450 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:43:53,451 INFO L93 Difference]: Finished difference Result 133 states and 157 transitions. [2020-10-27 14:43:53,451 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-27 14:43:53,451 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 52 [2020-10-27 14:43:53,452 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:43:53,453 INFO L225 Difference]: With dead ends: 133 [2020-10-27 14:43:53,453 INFO L226 Difference]: Without dead ends: 126 [2020-10-27 14:43:53,455 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 291 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=216, Invalid=1044, Unknown=0, NotChecked=0, Total=1260 [2020-10-27 14:43:53,455 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2020-10-27 14:43:53,475 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 107. [2020-10-27 14:43:53,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 107 states. [2020-10-27 14:43:53,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 131 transitions. [2020-10-27 14:43:53,476 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 131 transitions. Word has length 52 [2020-10-27 14:43:53,476 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:43:53,477 INFO L481 AbstractCegarLoop]: Abstraction has 107 states and 131 transitions. [2020-10-27 14:43:53,477 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-27 14:43:53,477 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 131 transitions. [2020-10-27 14:43:53,477 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-10-27 14:43:53,477 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:43:53,477 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 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] [2020-10-27 14:43:53,478 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-10-27 14:43:53,478 INFO L429 AbstractCegarLoop]: === Iteration 22 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:43:53,478 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:43:53,478 INFO L82 PathProgramCache]: Analyzing trace with hash 1528543876, now seen corresponding path program 10 times [2020-10-27 14:43:53,478 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:43:53,479 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [765728557] [2020-10-27 14:43:53,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:43:53,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:43:53,500 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:43:53,530 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:43:56,267 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:43:56,268 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 66 [2020-10-27 14:43:56,268 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 14:43:56,268 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2775 [2020-10-27 14:43:56,268 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:43:56,268 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-27 14:43:56,268 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 30 [2020-10-27 14:43:56,268 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-10-27 14:43:56,268 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:43:56,430 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:43:56,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:43:56,433 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:43:56,437 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:43:56,437 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:43:56,437 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:43:56,437 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 14:43:56,437 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:43:56,437 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:43:56,437 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:43:56,437 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:43:56,438 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:43:56,439 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-27 14:43:56,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:43:56,440 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:43:56,441 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:43:56,441 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 14:43:56,441 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:43:56,441 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-27 14:43:56,441 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:43:56,441 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:43:56,441 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:43:56,442 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:43:56,442 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:43:56,445 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 25 proven. 22 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2020-10-27 14:43:56,445 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [765728557] [2020-10-27 14:43:56,445 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:43:56,445 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-27 14:43:56,446 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1375713494] [2020-10-27 14:43:56,446 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-27 14:43:56,446 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:43:56,446 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-27 14:43:56,446 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2020-10-27 14:43:56,447 INFO L87 Difference]: Start difference. First operand 107 states and 131 transitions. Second operand 14 states. [2020-10-27 14:43:57,056 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:43:57,057 INFO L93 Difference]: Finished difference Result 300 states and 363 transitions. [2020-10-27 14:43:57,061 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-27 14:43:57,061 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 54 [2020-10-27 14:43:57,061 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:43:57,062 INFO L225 Difference]: With dead ends: 300 [2020-10-27 14:43:57,063 INFO L226 Difference]: Without dead ends: 180 [2020-10-27 14:43:57,064 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=94, Invalid=286, Unknown=0, NotChecked=0, Total=380 [2020-10-27 14:43:57,064 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 180 states. [2020-10-27 14:43:57,083 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 180 to 111. [2020-10-27 14:43:57,084 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 111 states. [2020-10-27 14:43:57,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 132 transitions. [2020-10-27 14:43:57,084 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 132 transitions. Word has length 54 [2020-10-27 14:43:57,085 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:43:57,085 INFO L481 AbstractCegarLoop]: Abstraction has 111 states and 132 transitions. [2020-10-27 14:43:57,085 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-27 14:43:57,085 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 132 transitions. [2020-10-27 14:43:57,085 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-10-27 14:43:57,085 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:43:57,085 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 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] [2020-10-27 14:43:57,086 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-10-27 14:43:57,086 INFO L429 AbstractCegarLoop]: === Iteration 23 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:43:57,086 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:43:57,086 INFO L82 PathProgramCache]: Analyzing trace with hash -740835996, now seen corresponding path program 11 times [2020-10-27 14:43:57,086 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:43:57,086 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1362885584] [2020-10-27 14:43:57,086 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:43:57,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:43:57,103 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:43:57,151 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:43:57,818 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:43:58,117 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:43:58,540 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:43:58,930 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:43:59,419 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:43:59,694 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:44:00,635 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:44:01,330 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:44:01,641 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:44:02,098 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:44:02,098 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 66 [2020-10-27 14:44:02,099 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 11 [2020-10-27 14:44:02,099 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-27 14:44:02,099 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:44:02,099 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 32 [2020-10-27 14:44:02,099 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-27 14:44:02,099 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 42 [2020-10-27 14:44:02,099 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:44:02,807 WARN L193 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 42 [2020-10-27 14:44:02,973 WARN L193 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 42 [2020-10-27 14:44:03,240 WARN L193 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 46 [2020-10-27 14:44:03,411 WARN L193 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 42 [2020-10-27 14:44:03,613 WARN L193 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 47 [2020-10-27 14:44:03,805 WARN L193 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 45 [2020-10-27 14:44:04,011 WARN L193 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 46 [2020-10-27 14:44:04,193 WARN L193 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 44 [2020-10-27 14:44:04,365 WARN L193 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 47 [2020-10-27 14:44:04,952 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 48 [2020-10-27 14:44:06,228 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:44:06,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:44:06,233 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:44:06,234 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:44:06,235 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:44:06,235 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:44:06,235 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 14:44:06,235 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:44:06,235 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:44:06,235 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:44:06,235 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:44:06,235 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:44:06,237 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-27 14:44:06,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:44:06,238 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:44:06,239 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:44:06,239 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 14:44:06,239 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:44:06,239 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-27 14:44:06,239 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:44:06,239 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:44:06,239 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:44:06,240 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:44:06,240 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:44:06,265 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 6 proven. 55 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-27 14:44:06,266 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1362885584] [2020-10-27 14:44:06,266 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:44:06,266 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33] total 33 [2020-10-27 14:44:06,266 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [761844417] [2020-10-27 14:44:06,266 INFO L461 AbstractCegarLoop]: Interpolant automaton has 33 states [2020-10-27 14:44:06,267 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:44:06,267 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2020-10-27 14:44:06,267 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=949, Unknown=0, NotChecked=0, Total=1056 [2020-10-27 14:44:06,267 INFO L87 Difference]: Start difference. First operand 111 states and 132 transitions. Second operand 33 states. [2020-10-27 14:44:06,828 WARN L193 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 47 [2020-10-27 14:44:07,070 WARN L193 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 44 [2020-10-27 14:44:07,292 WARN L193 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 47 [2020-10-27 14:44:07,494 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 43 [2020-10-27 14:44:07,791 WARN L193 SmtUtils]: Spent 186.00 ms on a formula simplification. DAG size of input: 111 DAG size of output: 46 [2020-10-27 14:44:08,157 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 47 [2020-10-27 14:44:08,366 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 46 [2020-10-27 14:44:08,697 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 47 [2020-10-27 14:44:08,919 WARN L193 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 47 [2020-10-27 14:44:09,132 WARN L193 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 48 [2020-10-27 14:44:09,334 WARN L193 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 43 [2020-10-27 14:44:09,528 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 46 [2020-10-27 14:44:09,789 WARN L193 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 45 [2020-10-27 14:44:10,001 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 46 [2020-10-27 14:44:10,186 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 47 [2020-10-27 14:44:10,406 WARN L193 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 47 [2020-10-27 14:44:10,819 WARN L193 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 44 [2020-10-27 14:44:11,018 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 47 [2020-10-27 14:44:11,613 WARN L193 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 49 [2020-10-27 14:44:11,975 WARN L193 SmtUtils]: Spent 236.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 68 [2020-10-27 14:44:12,287 WARN L193 SmtUtils]: Spent 200.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 70 [2020-10-27 14:44:13,203 WARN L193 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 59 [2020-10-27 14:44:13,808 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:44:13,808 INFO L93 Difference]: Finished difference Result 128 states and 150 transitions. [2020-10-27 14:44:13,809 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2020-10-27 14:44:13,809 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 54 [2020-10-27 14:44:13,809 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:44:13,811 INFO L225 Difference]: With dead ends: 128 [2020-10-27 14:44:13,811 INFO L226 Difference]: Without dead ends: 111 [2020-10-27 14:44:13,813 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1181 ImplicationChecksByTransitivity, 9.9s TimeCoverageRelationStatistics Valid=512, Invalid=4180, Unknown=0, NotChecked=0, Total=4692 [2020-10-27 14:44:13,814 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2020-10-27 14:44:13,833 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 93. [2020-10-27 14:44:13,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2020-10-27 14:44:13,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 111 transitions. [2020-10-27 14:44:13,834 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 111 transitions. Word has length 54 [2020-10-27 14:44:13,834 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:44:13,834 INFO L481 AbstractCegarLoop]: Abstraction has 93 states and 111 transitions. [2020-10-27 14:44:13,834 INFO L482 AbstractCegarLoop]: Interpolant automaton has 33 states. [2020-10-27 14:44:13,835 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 111 transitions. [2020-10-27 14:44:13,835 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-10-27 14:44:13,835 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:44:13,835 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 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] [2020-10-27 14:44:13,836 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-10-27 14:44:13,836 INFO L429 AbstractCegarLoop]: === Iteration 24 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:44:13,836 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:44:13,836 INFO L82 PathProgramCache]: Analyzing trace with hash -1988648239, now seen corresponding path program 12 times [2020-10-27 14:44:13,836 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:44:13,837 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [706087165] [2020-10-27 14:44:13,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:44:13,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:44:13,856 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:44:13,871 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:44:13,896 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:44:14,279 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:44:14,467 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:44:14,621 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:44:14,835 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:44:15,297 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:44:15,391 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:44:15,586 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:44:15,760 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:44:16,370 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:44:16,678 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:44:17,014 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:44:17,410 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:44:17,447 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:44:18,105 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:44:18,231 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:44:18,445 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:44:18,852 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:44:18,852 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 69 [2020-10-27 14:44:18,852 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 19 [2020-10-27 14:44:18,852 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-27 14:44:18,852 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:44:18,852 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 19 [2020-10-27 14:44:18,852 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 32 [2020-10-27 14:44:18,852 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 27 [2020-10-27 14:44:18,852 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:44:19,458 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:44:19,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:44:19,460 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:44:19,463 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:44:19,463 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:44:19,463 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:44:19,463 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 14:44:19,463 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:44:19,463 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:44:19,463 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:44:19,464 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:44:19,464 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:44:19,466 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-27 14:44:19,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:44:19,468 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:44:19,469 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:44:19,469 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 14:44:19,469 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:44:19,469 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-27 14:44:19,469 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:44:19,470 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:44:19,470 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:44:19,470 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:44:19,470 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:44:19,480 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 3 proven. 48 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2020-10-27 14:44:19,481 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [706087165] [2020-10-27 14:44:19,481 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:44:19,481 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-10-27 14:44:19,481 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1284995321] [2020-10-27 14:44:19,482 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-27 14:44:19,482 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:44:19,482 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-27 14:44:19,482 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=337, Unknown=0, NotChecked=0, Total=420 [2020-10-27 14:44:19,483 INFO L87 Difference]: Start difference. First operand 93 states and 111 transitions. Second operand 21 states. [2020-10-27 14:44:20,238 WARN L193 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 48 [2020-10-27 14:44:20,582 WARN L193 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 52 [2020-10-27 14:44:21,776 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:44:21,777 INFO L93 Difference]: Finished difference Result 199 states and 237 transitions. [2020-10-27 14:44:21,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-10-27 14:44:21,778 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 57 [2020-10-27 14:44:21,778 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:44:21,780 INFO L225 Difference]: With dead ends: 199 [2020-10-27 14:44:21,780 INFO L226 Difference]: Without dead ends: 192 [2020-10-27 14:44:21,782 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 580 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=534, Invalid=2016, Unknown=0, NotChecked=0, Total=2550 [2020-10-27 14:44:21,782 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 192 states. [2020-10-27 14:44:21,807 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 192 to 112. [2020-10-27 14:44:21,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 112 states. [2020-10-27 14:44:21,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 137 transitions. [2020-10-27 14:44:21,808 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 137 transitions. Word has length 57 [2020-10-27 14:44:21,808 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:44:21,808 INFO L481 AbstractCegarLoop]: Abstraction has 112 states and 137 transitions. [2020-10-27 14:44:21,808 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-27 14:44:21,808 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 137 transitions. [2020-10-27 14:44:21,809 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-10-27 14:44:21,809 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:44:21,809 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 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] [2020-10-27 14:44:21,809 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-10-27 14:44:21,809 INFO L429 AbstractCegarLoop]: === Iteration 25 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:44:21,809 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:44:21,809 INFO L82 PathProgramCache]: Analyzing trace with hash -1769793521, now seen corresponding path program 10 times [2020-10-27 14:44:21,810 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:44:21,810 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1727081853] [2020-10-27 14:44:21,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:44:21,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:44:21,830 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:44:21,849 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:44:21,913 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:44:23,457 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:44:23,556 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:44:24,824 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:44:24,890 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:44:25,185 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:44:25,576 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:44:25,649 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:44:25,790 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:44:25,982 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:44:26,761 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:44:26,829 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:44:26,830 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 69 [2020-10-27 14:44:26,830 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 13 [2020-10-27 14:44:26,830 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5006 [2020-10-27 14:44:26,830 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:44:26,830 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-27 14:44:26,830 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 32 [2020-10-27 14:44:26,830 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 27 [2020-10-27 14:44:26,831 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 14:44:27,253 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:44:27,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:44:27,259 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:44:27,266 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:44:27,267 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:44:27,267 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:44:27,267 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-27 14:44:27,267 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:44:27,268 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:44:27,268 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:44:27,268 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:44:27,270 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-27 14:44:27,275 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-27 14:44:27,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:44:27,277 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:44:27,278 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:44:27,278 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 14:44:27,278 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:44:27,278 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-27 14:44:27,279 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:44:27,279 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:44:27,279 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:44:27,279 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:44:27,280 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:44:27,293 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2020-10-27 14:44:27,293 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1727081853] [2020-10-27 14:44:27,294 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:44:27,294 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-10-27 14:44:27,294 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [275816847] [2020-10-27 14:44:27,295 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-27 14:44:27,296 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:44:27,296 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-27 14:44:27,297 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=321, Unknown=0, NotChecked=0, Total=380 [2020-10-27 14:44:27,297 INFO L87 Difference]: Start difference. First operand 112 states and 137 transitions. Second operand 20 states. [2020-10-27 14:44:31,173 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:44:31,173 INFO L93 Difference]: Finished difference Result 407 states and 509 transitions. [2020-10-27 14:44:31,174 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2020-10-27 14:44:31,174 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 57 [2020-10-27 14:44:31,174 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:44:31,178 INFO L225 Difference]: With dead ends: 407 [2020-10-27 14:44:31,178 INFO L226 Difference]: Without dead ends: 400 [2020-10-27 14:44:31,179 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1394 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=796, Invalid=4034, Unknown=0, NotChecked=0, Total=4830 [2020-10-27 14:44:31,180 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 400 states. [2020-10-27 14:44:31,214 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 400 to 148. [2020-10-27 14:44:31,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 148 states. [2020-10-27 14:44:31,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 189 transitions. [2020-10-27 14:44:31,215 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 189 transitions. Word has length 57 [2020-10-27 14:44:31,215 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:44:31,215 INFO L481 AbstractCegarLoop]: Abstraction has 148 states and 189 transitions. [2020-10-27 14:44:31,215 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-27 14:44:31,215 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 189 transitions. [2020-10-27 14:44:31,216 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2020-10-27 14:44:31,216 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:44:31,216 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:44:31,216 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-10-27 14:44:31,216 INFO L429 AbstractCegarLoop]: === Iteration 26 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:44:31,217 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:44:31,217 INFO L82 PathProgramCache]: Analyzing trace with hash 1364016719, now seen corresponding path program 13 times [2020-10-27 14:44:31,217 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:44:31,217 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1357100650] [2020-10-27 14:44:31,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:44:31,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:44:31,251 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:44:31,659 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:44:32,566 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:44:32,700 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:44:33,677 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:44:34,609 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:44:36,172 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:44:36,238 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:44:36,238 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 71 [2020-10-27 14:44:36,238 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-27 14:44:36,238 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-27 14:44:36,238 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:44:36,239 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 36 [2020-10-27 14:44:36,239 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-27 14:44:36,239 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 47 [2020-10-27 14:44:36,239 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:44:36,739 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 31 [2020-10-27 14:44:36,961 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 33 [2020-10-27 14:44:37,220 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 36 [2020-10-27 14:44:37,543 WARN L193 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 44 [2020-10-27 14:44:37,771 WARN L193 SmtUtils]: Spent 180.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 43 [2020-10-27 14:44:37,945 WARN L193 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 42 [2020-10-27 14:44:38,266 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 46 [2020-10-27 14:44:41,295 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:44:41,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:44:41,301 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:44:41,304 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:44:41,304 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:44:41,304 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:44:41,304 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 14:44:41,304 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:44:41,304 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:44:41,304 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:44:41,304 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:44:41,304 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:44:41,306 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-27 14:44:41,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:44:41,307 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:44:41,308 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:44:41,308 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 14:44:41,309 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:44:41,309 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-27 14:44:41,309 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:44:41,309 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:44:41,309 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:44:41,309 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:44:41,309 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:44:41,340 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 12 proven. 73 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 14:44:41,341 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1357100650] [2020-10-27 14:44:41,341 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:44:41,341 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38] total 38 [2020-10-27 14:44:41,341 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [894171582] [2020-10-27 14:44:41,341 INFO L461 AbstractCegarLoop]: Interpolant automaton has 38 states [2020-10-27 14:44:41,341 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:44:41,342 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2020-10-27 14:44:41,342 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=156, Invalid=1250, Unknown=0, NotChecked=0, Total=1406 [2020-10-27 14:44:41,342 INFO L87 Difference]: Start difference. First operand 148 states and 189 transitions. Second operand 38 states. [2020-10-27 14:44:41,937 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 39 [2020-10-27 14:44:43,401 WARN L193 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 47 [2020-10-27 14:44:44,647 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:44:44,647 INFO L93 Difference]: Finished difference Result 205 states and 256 transitions. [2020-10-27 14:44:44,648 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2020-10-27 14:44:44,649 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 59 [2020-10-27 14:44:44,649 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:44:44,651 INFO L225 Difference]: With dead ends: 205 [2020-10-27 14:44:44,651 INFO L226 Difference]: Without dead ends: 185 [2020-10-27 14:44:44,653 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 464 ImplicationChecksByTransitivity, 6.4s TimeCoverageRelationStatistics Valid=293, Invalid=2257, Unknown=0, NotChecked=0, Total=2550 [2020-10-27 14:44:44,654 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 185 states. [2020-10-27 14:44:44,690 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 185 to 155. [2020-10-27 14:44:44,690 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 155 states. [2020-10-27 14:44:44,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 199 transitions. [2020-10-27 14:44:44,691 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 199 transitions. Word has length 59 [2020-10-27 14:44:44,691 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:44:44,691 INFO L481 AbstractCegarLoop]: Abstraction has 155 states and 199 transitions. [2020-10-27 14:44:44,691 INFO L482 AbstractCegarLoop]: Interpolant automaton has 38 states. [2020-10-27 14:44:44,691 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 199 transitions. [2020-10-27 14:44:44,692 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2020-10-27 14:44:44,692 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:44:44,693 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 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] [2020-10-27 14:44:44,693 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-10-27 14:44:44,693 INFO L429 AbstractCegarLoop]: === Iteration 27 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:44:44,693 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:44:44,693 INFO L82 PathProgramCache]: Analyzing trace with hash 1230003213, now seen corresponding path program 11 times [2020-10-27 14:44:44,693 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:44:44,694 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [523512332] [2020-10-27 14:44:44,694 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:44:44,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:44:44,723 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:44:44,783 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:44:44,869 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:44:45,015 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:44:45,112 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:44:45,315 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:44:47,620 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:44:47,687 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:44:48,112 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:44:48,311 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:44:48,410 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:44:48,474 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:44:48,596 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:44:48,848 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:44:49,432 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:44:49,699 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:44:49,748 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:44:49,749 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 71 [2020-10-27 14:44:49,749 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 16 [2020-10-27 14:44:49,749 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5038 [2020-10-27 14:44:49,749 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:44:49,749 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-10-27 14:44:49,749 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 27 [2020-10-27 14:44:49,749 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-10-27 14:44:49,749 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:44:50,623 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:44:50,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:44:50,625 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:44:50,627 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:44:50,627 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:44:50,628 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:44:50,628 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 14:44:50,628 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:44:50,628 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:44:50,628 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:44:50,628 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:44:50,628 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:44:50,629 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-27 14:44:50,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:44:50,630 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:44:50,631 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:44:50,631 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 14:44:50,631 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:44:50,631 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-27 14:44:50,631 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:44:50,631 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:44:50,631 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:44:50,631 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:44:50,632 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:44:50,641 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 34 proven. 35 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2020-10-27 14:44:50,641 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [523512332] [2020-10-27 14:44:50,641 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:44:50,641 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-10-27 14:44:50,641 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2026814834] [2020-10-27 14:44:50,642 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-27 14:44:50,642 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:44:50,642 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-27 14:44:50,642 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=316, Unknown=0, NotChecked=0, Total=380 [2020-10-27 14:44:50,642 INFO L87 Difference]: Start difference. First operand 155 states and 199 transitions. Second operand 20 states. [2020-10-27 14:44:51,717 WARN L193 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 44 [2020-10-27 14:44:52,378 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 40 [2020-10-27 14:44:52,946 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:44:52,946 INFO L93 Difference]: Finished difference Result 197 states and 244 transitions. [2020-10-27 14:44:52,947 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-10-27 14:44:52,947 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 59 [2020-10-27 14:44:52,948 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:44:52,949 INFO L225 Difference]: With dead ends: 197 [2020-10-27 14:44:52,949 INFO L226 Difference]: Without dead ends: 172 [2020-10-27 14:44:52,950 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 5 SyntacticMatches, 2 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 486 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=370, Invalid=1610, Unknown=0, NotChecked=0, Total=1980 [2020-10-27 14:44:52,951 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2020-10-27 14:44:52,979 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 132. [2020-10-27 14:44:52,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 132 states. [2020-10-27 14:44:52,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 166 transitions. [2020-10-27 14:44:52,980 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 166 transitions. Word has length 59 [2020-10-27 14:44:52,980 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:44:52,980 INFO L481 AbstractCegarLoop]: Abstraction has 132 states and 166 transitions. [2020-10-27 14:44:52,980 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-27 14:44:52,981 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 166 transitions. [2020-10-27 14:44:52,981 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2020-10-27 14:44:52,981 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:44:52,981 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 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] [2020-10-27 14:44:52,982 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-10-27 14:44:52,982 INFO L429 AbstractCegarLoop]: === Iteration 28 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:44:52,982 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:44:52,982 INFO L82 PathProgramCache]: Analyzing trace with hash -1007722543, now seen corresponding path program 12 times [2020-10-27 14:44:52,982 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:44:52,983 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2079536016] [2020-10-27 14:44:52,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:44:53,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:44:53,024 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:44:53,111 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:44:53,203 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:44:54,392 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:44:54,664 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:44:57,557 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:44:58,012 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:44:58,012 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 71 [2020-10-27 14:44:58,012 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-27 14:44:58,012 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-10-27 14:44:58,012 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:44:58,012 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 21 [2020-10-27 14:44:58,012 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 25 [2020-10-27 14:44:58,013 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 36 [2020-10-27 14:44:58,013 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:44:58,429 WARN L193 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 32 [2020-10-27 14:44:58,858 WARN L193 SmtUtils]: Spent 362.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 46 [2020-10-27 14:44:59,054 WARN L193 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 32 [2020-10-27 14:44:59,428 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:44:59,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:44:59,432 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:44:59,434 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:44:59,434 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:44:59,434 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:44:59,434 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 14:44:59,434 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:44:59,434 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:44:59,434 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:44:59,435 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:44:59,435 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:44:59,436 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-27 14:44:59,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:44:59,437 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:44:59,437 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:44:59,437 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 14:44:59,438 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:44:59,438 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-27 14:44:59,438 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:44:59,438 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:44:59,438 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:44:59,438 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:44:59,438 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:44:59,449 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 31 proven. 43 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2020-10-27 14:44:59,449 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2079536016] [2020-10-27 14:44:59,450 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:44:59,450 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-10-27 14:44:59,450 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1163195509] [2020-10-27 14:44:59,450 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-27 14:44:59,450 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:44:59,450 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-27 14:44:59,451 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=350, Unknown=0, NotChecked=0, Total=420 [2020-10-27 14:44:59,451 INFO L87 Difference]: Start difference. First operand 132 states and 166 transitions. Second operand 21 states. [2020-10-27 14:45:00,082 WARN L193 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 51 [2020-10-27 14:45:00,584 WARN L193 SmtUtils]: Spent 237.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 56 [2020-10-27 14:45:00,813 WARN L193 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 55 [2020-10-27 14:45:01,030 WARN L193 SmtUtils]: Spent 177.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 56 [2020-10-27 14:45:01,278 WARN L193 SmtUtils]: Spent 183.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 60 [2020-10-27 14:45:01,533 WARN L193 SmtUtils]: Spent 214.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 63 [2020-10-27 14:45:02,382 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:45:02,382 INFO L93 Difference]: Finished difference Result 190 states and 234 transitions. [2020-10-27 14:45:02,383 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-27 14:45:02,383 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 59 [2020-10-27 14:45:02,383 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:45:02,384 INFO L225 Difference]: With dead ends: 190 [2020-10-27 14:45:02,384 INFO L226 Difference]: Without dead ends: 183 [2020-10-27 14:45:02,385 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 5 SyntacticMatches, 2 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 443 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=277, Invalid=1529, Unknown=0, NotChecked=0, Total=1806 [2020-10-27 14:45:02,385 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2020-10-27 14:45:02,416 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 95. [2020-10-27 14:45:02,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 95 states. [2020-10-27 14:45:02,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 113 transitions. [2020-10-27 14:45:02,417 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 113 transitions. Word has length 59 [2020-10-27 14:45:02,417 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:45:02,417 INFO L481 AbstractCegarLoop]: Abstraction has 95 states and 113 transitions. [2020-10-27 14:45:02,417 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-27 14:45:02,417 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 113 transitions. [2020-10-27 14:45:02,417 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2020-10-27 14:45:02,417 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:45:02,418 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 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] [2020-10-27 14:45:02,418 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2020-10-27 14:45:02,418 INFO L429 AbstractCegarLoop]: === Iteration 29 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:45:02,418 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:45:02,418 INFO L82 PathProgramCache]: Analyzing trace with hash 1386648973, now seen corresponding path program 13 times [2020-10-27 14:45:02,418 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:45:02,418 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [555675978] [2020-10-27 14:45:02,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:45:02,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:45:02,443 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:45:02,525 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:45:02,911 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:45:03,160 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:45:03,230 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:45:03,341 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:45:03,566 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:45:03,995 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:45:04,115 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:45:04,625 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:45:05,819 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:45:07,248 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:45:07,437 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:45:07,489 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:45:07,489 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 71 [2020-10-27 14:45:07,489 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 13 [2020-10-27 14:45:07,489 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5056 [2020-10-27 14:45:07,490 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:45:07,490 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 21 [2020-10-27 14:45:07,490 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 23 [2020-10-27 14:45:07,490 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 38 [2020-10-27 14:45:07,490 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:45:07,997 WARN L193 SmtUtils]: Spent 211.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 43 [2020-10-27 14:45:08,478 WARN L193 SmtUtils]: Spent 422.00 ms on a formula simplification. DAG size of input: 113 DAG size of output: 44 [2020-10-27 14:45:08,991 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:45:08,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:45:08,995 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:45:08,997 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:45:08,997 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:45:08,998 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:45:08,998 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 14:45:08,998 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:45:08,998 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:45:08,998 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:45:08,998 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:45:08,998 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:45:09,000 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-27 14:45:09,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:45:09,001 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:45:09,005 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:45:09,005 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 14:45:09,005 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:45:09,005 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 14:45:09,006 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:45:09,006 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:45:09,006 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:45:09,006 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:45:09,006 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:45:09,015 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 37 proven. 32 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2020-10-27 14:45:09,016 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [555675978] [2020-10-27 14:45:09,016 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:45:09,016 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-10-27 14:45:09,016 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [640033162] [2020-10-27 14:45:09,016 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-27 14:45:09,017 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:45:09,017 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-27 14:45:09,017 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=384, Unknown=0, NotChecked=0, Total=462 [2020-10-27 14:45:09,017 INFO L87 Difference]: Start difference. First operand 95 states and 113 transitions. Second operand 22 states. [2020-10-27 14:45:09,695 WARN L193 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 39 [2020-10-27 14:45:09,992 WARN L193 SmtUtils]: Spent 219.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 70 [2020-10-27 14:45:10,389 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 51 [2020-10-27 14:45:11,097 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:45:11,097 INFO L93 Difference]: Finished difference Result 157 states and 183 transitions. [2020-10-27 14:45:11,099 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-27 14:45:11,099 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 59 [2020-10-27 14:45:11,100 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:45:11,100 INFO L225 Difference]: With dead ends: 157 [2020-10-27 14:45:11,101 INFO L226 Difference]: Without dead ends: 150 [2020-10-27 14:45:11,101 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 363 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=262, Invalid=1298, Unknown=0, NotChecked=0, Total=1560 [2020-10-27 14:45:11,103 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2020-10-27 14:45:11,133 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 89. [2020-10-27 14:45:11,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2020-10-27 14:45:11,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 105 transitions. [2020-10-27 14:45:11,134 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 105 transitions. Word has length 59 [2020-10-27 14:45:11,134 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:45:11,134 INFO L481 AbstractCegarLoop]: Abstraction has 89 states and 105 transitions. [2020-10-27 14:45:11,134 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-27 14:45:11,134 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 105 transitions. [2020-10-27 14:45:11,135 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2020-10-27 14:45:11,135 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:45:11,135 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 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] [2020-10-27 14:45:11,135 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2020-10-27 14:45:11,135 INFO L429 AbstractCegarLoop]: === Iteration 30 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:45:11,135 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:45:11,136 INFO L82 PathProgramCache]: Analyzing trace with hash 1291630161, now seen corresponding path program 14 times [2020-10-27 14:45:11,136 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:45:11,136 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1841555030] [2020-10-27 14:45:11,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:45:11,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:45:11,159 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:45:11,281 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:45:11,543 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:45:11,707 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:45:12,067 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:45:13,791 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:45:13,832 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:45:14,140 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:45:14,304 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:45:16,162 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:45:16,163 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 71 [2020-10-27 14:45:16,163 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-27 14:45:16,163 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5012 [2020-10-27 14:45:16,163 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:45:16,163 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 21 [2020-10-27 14:45:16,163 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 21 [2020-10-27 14:45:16,163 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 40 [2020-10-27 14:45:16,163 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:45:16,810 WARN L193 SmtUtils]: Spent 264.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 43 [2020-10-27 14:45:17,100 WARN L193 SmtUtils]: Spent 252.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 44 [2020-10-27 14:45:17,477 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:45:17,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:45:17,480 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:45:17,483 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:45:17,483 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:45:17,483 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:45:17,483 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 14:45:17,483 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:45:17,483 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:45:17,484 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:45:17,484 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:45:17,484 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:45:17,485 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-27 14:45:17,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:45:17,486 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:45:17,486 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:45:17,487 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 14:45:17,487 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:45:17,487 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-27 14:45:17,487 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:45:17,487 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:45:17,487 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:45:17,487 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:45:17,487 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:45:17,497 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 27 proven. 32 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2020-10-27 14:45:17,497 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1841555030] [2020-10-27 14:45:17,497 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:45:17,498 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-10-27 14:45:17,498 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1629139315] [2020-10-27 14:45:17,498 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-27 14:45:17,498 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:45:17,498 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-27 14:45:17,499 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=418, Unknown=0, NotChecked=0, Total=506 [2020-10-27 14:45:17,499 INFO L87 Difference]: Start difference. First operand 89 states and 105 transitions. Second operand 23 states. [2020-10-27 14:45:18,332 WARN L193 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 52 [2020-10-27 14:45:19,366 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:45:19,366 INFO L93 Difference]: Finished difference Result 148 states and 171 transitions. [2020-10-27 14:45:19,367 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-27 14:45:19,368 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 59 [2020-10-27 14:45:19,368 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:45:19,369 INFO L225 Difference]: With dead ends: 148 [2020-10-27 14:45:19,369 INFO L226 Difference]: Without dead ends: 141 [2020-10-27 14:45:19,371 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 400 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=272, Invalid=1368, Unknown=0, NotChecked=0, Total=1640 [2020-10-27 14:45:19,371 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2020-10-27 14:45:19,400 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 89. [2020-10-27 14:45:19,401 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2020-10-27 14:45:19,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 105 transitions. [2020-10-27 14:45:19,402 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 105 transitions. Word has length 59 [2020-10-27 14:45:19,402 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:45:19,402 INFO L481 AbstractCegarLoop]: Abstraction has 89 states and 105 transitions. [2020-10-27 14:45:19,402 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-27 14:45:19,402 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 105 transitions. [2020-10-27 14:45:19,403 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-10-27 14:45:19,403 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:45:19,403 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 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] [2020-10-27 14:45:19,403 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2020-10-27 14:45:19,403 INFO L429 AbstractCegarLoop]: === Iteration 31 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:45:19,403 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:45:19,404 INFO L82 PathProgramCache]: Analyzing trace with hash -859194545, now seen corresponding path program 15 times [2020-10-27 14:45:19,404 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:45:19,404 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1211483199] [2020-10-27 14:45:19,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:45:19,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:45:19,427 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:45:19,455 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:45:19,475 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:45:20,518 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:45:20,972 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:45:22,017 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:45:22,129 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:45:23,945 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:45:24,329 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:45:24,420 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:45:24,420 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 73 [2020-10-27 14:45:24,420 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-27 14:45:24,420 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-27 14:45:24,420 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:45:24,420 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-27 14:45:24,420 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 32 [2020-10-27 14:45:24,420 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 29 [2020-10-27 14:45:24,421 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:45:24,632 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:45:24,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:45:24,635 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:45:24,637 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:45:24,637 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:45:24,637 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:45:24,637 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 14:45:24,637 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:45:24,638 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:45:24,638 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:45:24,638 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:45:24,638 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:45:24,640 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-27 14:45:24,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:45:24,641 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:45:24,642 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:45:24,642 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 14:45:24,642 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:45:24,642 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-27 14:45:24,642 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:45:24,642 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:45:24,642 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:45:24,642 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:45:24,643 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:45:24,647 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 36 proven. 35 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2020-10-27 14:45:24,647 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1211483199] [2020-10-27 14:45:24,648 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:45:24,648 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-27 14:45:24,648 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1318562172] [2020-10-27 14:45:24,648 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-27 14:45:24,648 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:45:24,649 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-27 14:45:24,649 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=181, Unknown=0, NotChecked=0, Total=240 [2020-10-27 14:45:24,649 INFO L87 Difference]: Start difference. First operand 89 states and 105 transitions. Second operand 16 states. [2020-10-27 14:45:25,368 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:45:25,368 INFO L93 Difference]: Finished difference Result 291 states and 353 transitions. [2020-10-27 14:45:25,369 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-27 14:45:25,369 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 61 [2020-10-27 14:45:25,369 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:45:25,371 INFO L225 Difference]: With dead ends: 291 [2020-10-27 14:45:25,371 INFO L226 Difference]: Without dead ends: 169 [2020-10-27 14:45:25,372 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=123, Invalid=383, Unknown=0, NotChecked=0, Total=506 [2020-10-27 14:45:25,373 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2020-10-27 14:45:25,399 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 97. [2020-10-27 14:45:25,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2020-10-27 14:45:25,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 115 transitions. [2020-10-27 14:45:25,400 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 115 transitions. Word has length 61 [2020-10-27 14:45:25,400 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:45:25,400 INFO L481 AbstractCegarLoop]: Abstraction has 97 states and 115 transitions. [2020-10-27 14:45:25,400 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-27 14:45:25,401 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 115 transitions. [2020-10-27 14:45:25,401 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2020-10-27 14:45:25,401 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:45:25,401 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:45:25,402 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2020-10-27 14:45:25,402 INFO L429 AbstractCegarLoop]: === Iteration 32 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:45:25,402 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:45:25,402 INFO L82 PathProgramCache]: Analyzing trace with hash 519142560, now seen corresponding path program 14 times [2020-10-27 14:45:25,402 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:45:25,403 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [386815055] [2020-10-27 14:45:25,403 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:45:25,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:45:25,423 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:45:25,498 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:45:25,518 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:45:25,631 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:45:25,975 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:45:26,127 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:45:26,444 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:45:27,075 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:45:29,087 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:45:29,260 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:45:29,354 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:45:29,440 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:45:29,667 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:45:29,714 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:45:29,765 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:45:29,974 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:45:30,049 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:45:30,101 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:45:30,310 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:45:30,411 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:45:30,462 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:45:30,462 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 76 [2020-10-27 14:45:30,462 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 20 [2020-10-27 14:45:30,462 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5045 [2020-10-27 14:45:30,462 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:45:30,462 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-27 14:45:30,462 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 34 [2020-10-27 14:45:30,462 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-27 14:45:30,462 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:45:30,689 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:45:30,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:45:30,694 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:45:30,695 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:45:30,695 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:45:30,696 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:45:30,696 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 14:45:30,696 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:45:30,696 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:45:30,696 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:45:30,696 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:45:30,696 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:45:30,698 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-27 14:45:30,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:45:30,699 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:45:30,700 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:45:30,700 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 14:45:30,701 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:45:30,701 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-27 14:45:30,701 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:45:30,701 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:45:30,701 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:45:30,701 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:45:30,701 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:45:30,705 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 35 proven. 41 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2020-10-27 14:45:30,706 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [386815055] [2020-10-27 14:45:30,706 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:45:30,706 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-27 14:45:30,706 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [651251424] [2020-10-27 14:45:30,706 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-27 14:45:30,707 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:45:30,707 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-27 14:45:30,707 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=181, Unknown=0, NotChecked=0, Total=240 [2020-10-27 14:45:30,707 INFO L87 Difference]: Start difference. First operand 97 states and 115 transitions. Second operand 16 states. [2020-10-27 14:45:31,658 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:45:31,658 INFO L93 Difference]: Finished difference Result 143 states and 167 transitions. [2020-10-27 14:45:31,659 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-27 14:45:31,659 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 64 [2020-10-27 14:45:31,660 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:45:31,661 INFO L225 Difference]: With dead ends: 143 [2020-10-27 14:45:31,661 INFO L226 Difference]: Without dead ends: 136 [2020-10-27 14:45:31,662 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=193, Invalid=619, Unknown=0, NotChecked=0, Total=812 [2020-10-27 14:45:31,663 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2020-10-27 14:45:31,683 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 82. [2020-10-27 14:45:31,683 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2020-10-27 14:45:31,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 95 transitions. [2020-10-27 14:45:31,684 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 95 transitions. Word has length 64 [2020-10-27 14:45:31,684 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:45:31,684 INFO L481 AbstractCegarLoop]: Abstraction has 82 states and 95 transitions. [2020-10-27 14:45:31,684 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-27 14:45:31,684 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 95 transitions. [2020-10-27 14:45:31,685 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-10-27 14:45:31,685 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:45:31,685 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:45:31,685 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2020-10-27 14:45:31,685 INFO L429 AbstractCegarLoop]: === Iteration 33 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:45:31,685 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:45:31,685 INFO L82 PathProgramCache]: Analyzing trace with hash 1874321502, now seen corresponding path program 15 times [2020-10-27 14:45:31,686 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:45:31,686 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1381997325] [2020-10-27 14:45:31,686 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:45:31,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:45:31,727 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:45:32,798 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:45:33,996 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:45:36,549 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:45:37,032 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:45:37,032 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 78 [2020-10-27 14:45:37,032 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 14:45:37,032 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5324 [2020-10-27 14:45:37,032 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:45:37,032 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 44 [2020-10-27 14:45:37,033 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-27 14:45:37,033 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 54 [2020-10-27 14:45:37,033 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:45:38,115 WARN L193 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 44 [2020-10-27 14:45:38,263 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 42 [2020-10-27 14:45:38,414 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 42 [2020-10-27 14:45:38,590 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 41 [2020-10-27 14:45:38,877 WARN L193 SmtUtils]: Spent 205.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 53 [2020-10-27 14:45:39,120 WARN L193 SmtUtils]: Spent 179.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 51 [2020-10-27 14:45:39,369 WARN L193 SmtUtils]: Spent 179.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 54 [2020-10-27 14:45:39,564 WARN L193 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 43 [2020-10-27 14:45:39,850 WARN L193 SmtUtils]: Spent 218.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 59 [2020-10-27 14:45:40,212 WARN L193 SmtUtils]: Spent 278.00 ms on a formula simplification. DAG size of input: 104 DAG size of output: 68 [2020-10-27 14:45:40,510 WARN L193 SmtUtils]: Spent 221.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 63