/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=SMALLESTAMONGWIDE --traceabstraction.additional.smt.options tolerance=0.3 --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/seq-mthreaded-reduced/pals_lcr.4.ufo.BOUNDED-8.pals.c.v+lhb-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-29 13:18:11,497 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-29 13:18:11,500 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-29 13:18:11,569 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-29 13:18:11,570 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-29 13:18:11,579 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-29 13:18:11,581 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-29 13:18:11,586 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-29 13:18:11,589 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-29 13:18:11,597 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-29 13:18:11,598 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-29 13:18:11,600 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-29 13:18:11,600 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-29 13:18:11,603 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-29 13:18:11,606 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-29 13:18:11,608 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-29 13:18:11,609 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-29 13:18:11,613 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-29 13:18:11,621 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-29 13:18:11,626 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-29 13:18:11,630 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-29 13:18:11,632 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-29 13:18:11,633 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-29 13:18:11,636 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-29 13:18:11,642 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-29 13:18:11,642 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-29 13:18:11,643 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-29 13:18:11,645 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-29 13:18:11,646 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-29 13:18:11,647 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-29 13:18:11,647 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-29 13:18:11,648 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-29 13:18:11,650 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-29 13:18:11,651 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-29 13:18:11,652 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-29 13:18:11,652 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-29 13:18:11,653 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-29 13:18:11,653 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-29 13:18:11,653 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-29 13:18:11,654 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-29 13:18:11,655 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-29 13:18:11,657 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 [2020-10-29 13:18:11,705 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-29 13:18:11,705 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-29 13:18:11,709 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-29 13:18:11,709 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-29 13:18:11,710 INFO L138 SettingsManager]: * Use SBE=true [2020-10-29 13:18:11,710 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-29 13:18:11,712 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-29 13:18:11,712 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-29 13:18:11,712 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-29 13:18:11,713 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-29 13:18:11,714 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-29 13:18:11,714 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-29 13:18:11,714 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-29 13:18:11,715 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-29 13:18:11,715 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-29 13:18:11,715 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-29 13:18:11,715 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-29 13:18:11,715 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-29 13:18:11,716 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-29 13:18:11,716 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-29 13:18:11,716 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-29 13:18:11,716 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-29 13:18:11,717 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-29 13:18:11,717 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-29 13:18:11,717 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-29 13:18:11,718 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-29 13:18:11,718 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-29 13:18:11,718 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-29 13:18:11,718 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-29 13:18:11,718 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.3;log-additional-information=true;unknown-allowed=true; [2020-10-29 13:18:12,142 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-29 13:18:12,173 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-29 13:18:12,177 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-29 13:18:12,178 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-29 13:18:12,179 INFO L275 PluginConnector]: CDTParser initialized [2020-10-29 13:18:12,180 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_lcr.4.ufo.BOUNDED-8.pals.c.v+lhb-reducer.c [2020-10-29 13:18:12,273 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/516febd90/dc9988ee25b84adda696d039c1e0f028/FLAGca81b37ef [2020-10-29 13:18:13,149 INFO L306 CDTParser]: Found 1 translation units. [2020-10-29 13:18:13,150 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/seq-mthreaded-reduced/pals_lcr.4.ufo.BOUNDED-8.pals.c.v+lhb-reducer.c [2020-10-29 13:18:13,167 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/516febd90/dc9988ee25b84adda696d039c1e0f028/FLAGca81b37ef [2020-10-29 13:18:13,401 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/516febd90/dc9988ee25b84adda696d039c1e0f028 [2020-10-29 13:18:13,404 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-29 13:18:13,411 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-29 13:18:13,413 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-29 13:18:13,413 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-29 13:18:13,418 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-29 13:18:13,419 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.10 01:18:13" (1/1) ... [2020-10-29 13:18:13,422 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7a13fe2e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 01:18:13, skipping insertion in model container [2020-10-29 13:18:13,423 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.10 01:18:13" (1/1) ... [2020-10-29 13:18:13,432 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-29 13:18:13,503 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-29 13:18:14,047 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-29 13:18:14,062 INFO L203 MainTranslator]: Completed pre-run [2020-10-29 13:18:14,264 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-29 13:18:14,292 INFO L208 MainTranslator]: Completed translation [2020-10-29 13:18:14,293 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 01:18:14 WrapperNode [2020-10-29 13:18:14,293 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-29 13:18:14,295 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-29 13:18:14,295 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-29 13:18:14,295 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-29 13:18:14,311 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 01:18:14" (1/1) ... [2020-10-29 13:18:14,312 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 01:18:14" (1/1) ... [2020-10-29 13:18:14,336 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 01:18:14" (1/1) ... [2020-10-29 13:18:14,337 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 01:18:14" (1/1) ... [2020-10-29 13:18:14,419 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 01:18:14" (1/1) ... [2020-10-29 13:18:14,460 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 01:18:14" (1/1) ... [2020-10-29 13:18:14,477 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 01:18:14" (1/1) ... [2020-10-29 13:18:14,493 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-29 13:18:14,497 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-29 13:18:14,497 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-29 13:18:14,497 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-29 13:18:14,502 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 01:18:14" (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 [2020-10-29 13:18:14,590 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-29 13:18:14,591 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-29 13:18:14,591 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-29 13:18:14,592 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-10-29 13:18:14,592 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-29 13:18:14,593 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-29 13:18:14,593 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-29 13:18:14,593 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-29 13:18:14,593 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-29 13:18:14,593 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-10-29 13:18:14,595 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-10-29 13:18:14,595 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2020-10-29 13:18:14,595 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-10-29 13:18:14,596 INFO L130 BoogieDeclarations]: Found specification of procedure read [2020-10-29 13:18:14,596 INFO L130 BoogieDeclarations]: Found specification of procedure write [2020-10-29 13:18:14,597 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2020-10-29 13:18:14,597 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2020-10-29 13:18:14,597 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2020-10-29 13:18:14,598 INFO L130 BoogieDeclarations]: Found specification of procedure node4 [2020-10-29 13:18:14,598 INFO L130 BoogieDeclarations]: Found specification of procedure init [2020-10-29 13:18:14,598 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-10-29 13:18:14,598 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-29 13:18:14,598 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-29 13:18:14,598 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-29 13:18:14,599 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-29 13:18:14,599 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-29 13:18:14,599 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-29 13:18:14,599 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-29 13:18:16,600 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-29 13:18:16,601 INFO L298 CfgBuilder]: Removed 0 assume(true) statements. [2020-10-29 13:18:16,606 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.10 01:18:16 BoogieIcfgContainer [2020-10-29 13:18:16,607 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-29 13:18:16,610 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-29 13:18:16,611 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-29 13:18:16,614 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-29 13:18:16,615 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 29.10 01:18:13" (1/3) ... [2020-10-29 13:18:16,616 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@67bd32dd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.10 01:18:16, skipping insertion in model container [2020-10-29 13:18:16,617 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 01:18:14" (2/3) ... [2020-10-29 13:18:16,617 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@67bd32dd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.10 01:18:16, skipping insertion in model container [2020-10-29 13:18:16,617 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.10 01:18:16" (3/3) ... [2020-10-29 13:18:16,619 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_lcr.4.ufo.BOUNDED-8.pals.c.v+lhb-reducer.c [2020-10-29 13:18:16,632 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-29 13:18:16,639 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-29 13:18:16,655 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-29 13:18:16,701 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-29 13:18:16,701 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-29 13:18:16,701 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-29 13:18:16,701 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-29 13:18:16,702 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-29 13:18:16,702 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-29 13:18:16,702 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-29 13:18:16,702 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-29 13:18:16,742 INFO L276 IsEmpty]: Start isEmpty. Operand 367 states. [2020-10-29 13:18:16,757 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2020-10-29 13:18:16,757 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:18:16,758 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 13:18:16,759 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:18:16,764 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:18:16,764 INFO L82 PathProgramCache]: Analyzing trace with hash 1822577129, now seen corresponding path program 1 times [2020-10-29 13:18:16,773 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:18:16,774 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [444804882] [2020-10-29 13:18:16,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:18:17,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:18:17,485 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:18:17,752 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:18:17,926 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:18:18,082 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:18:18,260 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:18:19,673 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:18:19,993 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:18:20,146 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:18:20,238 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:18:20,698 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:18:20,829 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:18:21,925 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:18:22,356 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:18:22,356 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 72 [2020-10-29 13:18:22,356 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 12 [2020-10-29 13:18:22,357 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5032 [2020-10-29 13:18:22,359 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:18:22,360 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:18:22,360 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-29 13:18:22,360 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-29 13:18:22,361 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 40 [2020-10-29 13:18:22,361 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-10-29 13:18:23,352 WARN L193 SmtUtils]: Spent 659.00 ms on a formula simplification that was a NOOP. DAG size: 247 [2020-10-29 13:18:23,355 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:18:23,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:18:23,394 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:18:23,449 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:18:23,450 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:18:23,450 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:18:23,450 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 65 [2020-10-29 13:18:23,450 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:18:23,451 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:18:23,451 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 13:18:23,451 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:18:23,452 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-29 13:18:23,452 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 13:18:23,512 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 13:18:23,513 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [444804882] [2020-10-29 13:18:23,516 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:18:23,517 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-29 13:18:23,518 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1447170057] [2020-10-29 13:18:23,530 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-29 13:18:23,530 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:18:23,553 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-29 13:18:23,554 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-29 13:18:23,557 INFO L87 Difference]: Start difference. First operand 367 states. Second operand 6 states. [2020-10-29 13:18:24,763 WARN L193 SmtUtils]: Spent 1.06 s on a formula simplification. DAG size of input: 256 DAG size of output: 255 [2020-10-29 13:18:27,301 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:18:27,302 INFO L93 Difference]: Finished difference Result 573 states and 998 transitions. [2020-10-29 13:18:27,303 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-29 13:18:27,304 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 64 [2020-10-29 13:18:27,305 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:18:27,333 INFO L225 Difference]: With dead ends: 573 [2020-10-29 13:18:27,333 INFO L226 Difference]: Without dead ends: 310 [2020-10-29 13:18:27,344 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-10-29 13:18:27,368 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 310 states. [2020-10-29 13:18:27,448 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 310 to 310. [2020-10-29 13:18:27,449 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 310 states. [2020-10-29 13:18:27,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 310 states to 310 states and 393 transitions. [2020-10-29 13:18:27,453 INFO L78 Accepts]: Start accepts. Automaton has 310 states and 393 transitions. Word has length 64 [2020-10-29 13:18:27,454 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:18:27,454 INFO L481 AbstractCegarLoop]: Abstraction has 310 states and 393 transitions. [2020-10-29 13:18:27,454 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-29 13:18:27,455 INFO L276 IsEmpty]: Start isEmpty. Operand 310 states and 393 transitions. [2020-10-29 13:18:27,459 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-10-29 13:18:27,459 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:18:27,459 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 13:18:27,459 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-29 13:18:27,460 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:18:27,460 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:18:27,461 INFO L82 PathProgramCache]: Analyzing trace with hash -1267835222, now seen corresponding path program 1 times [2020-10-29 13:18:27,461 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:18:27,461 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [966493683] [2020-10-29 13:18:27,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:18:27,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:18:27,551 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:18:27,641 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:18:27,734 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:18:27,828 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:18:27,977 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:18:28,221 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:18:28,583 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:18:28,823 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:18:32,528 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:18:32,528 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 73 [2020-10-29 13:18:32,529 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-29 13:18:32,529 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5013 [2020-10-29 13:18:32,529 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:18:32,529 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:18:32,530 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-29 13:18:32,530 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-29 13:18:32,530 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 38 [2020-10-29 13:18:32,530 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:18:33,121 WARN L193 SmtUtils]: Spent 449.00 ms on a formula simplification that was a NOOP. DAG size: 247 [2020-10-29 13:18:33,122 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:18:33,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:18:33,148 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:18:33,183 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:18:33,183 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:18:33,183 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:18:33,183 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 42 [2020-10-29 13:18:33,184 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:18:33,184 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:18:33,184 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 13:18:33,184 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:18:33,185 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-29 13:18:33,185 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 13:18:33,215 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 13:18:33,216 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [966493683] [2020-10-29 13:18:33,216 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:18:33,216 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-29 13:18:33,217 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [213453488] [2020-10-29 13:18:33,218 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-29 13:18:33,218 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:18:33,219 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-29 13:18:33,219 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-29 13:18:33,220 INFO L87 Difference]: Start difference. First operand 310 states and 393 transitions. Second operand 6 states. [2020-10-29 13:18:33,789 WARN L193 SmtUtils]: Spent 502.00 ms on a formula simplification that was a NOOP. DAG size: 255 [2020-10-29 13:18:35,575 WARN L193 SmtUtils]: Spent 506.00 ms on a formula simplification that was a NOOP. DAG size: 253 [2020-10-29 13:18:35,954 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:18:35,954 INFO L93 Difference]: Finished difference Result 620 states and 819 transitions. [2020-10-29 13:18:35,955 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-29 13:18:35,955 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 65 [2020-10-29 13:18:35,955 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:18:35,958 INFO L225 Difference]: With dead ends: 620 [2020-10-29 13:18:35,958 INFO L226 Difference]: Without dead ends: 394 [2020-10-29 13:18:35,960 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2020-10-29 13:18:35,962 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 394 states. [2020-10-29 13:18:35,992 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 394 to 357. [2020-10-29 13:18:35,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 357 states. [2020-10-29 13:18:35,995 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 357 states to 357 states and 473 transitions. [2020-10-29 13:18:35,995 INFO L78 Accepts]: Start accepts. Automaton has 357 states and 473 transitions. Word has length 65 [2020-10-29 13:18:35,996 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:18:35,996 INFO L481 AbstractCegarLoop]: Abstraction has 357 states and 473 transitions. [2020-10-29 13:18:35,996 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-29 13:18:35,996 INFO L276 IsEmpty]: Start isEmpty. Operand 357 states and 473 transitions. [2020-10-29 13:18:35,998 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-10-29 13:18:35,998 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:18:35,999 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 13:18:35,999 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-29 13:18:35,999 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:18:36,000 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:18:36,000 INFO L82 PathProgramCache]: Analyzing trace with hash 1064722283, now seen corresponding path program 1 times [2020-10-29 13:18:36,000 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:18:36,000 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [562732736] [2020-10-29 13:18:36,000 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:18:36,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:18:36,071 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:18:36,132 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:18:36,184 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:18:36,308 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:18:36,616 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:18:36,958 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:18:37,221 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:18:37,396 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:18:38,521 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:18:39,502 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:18:39,614 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:18:41,049 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:18:41,049 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 74 [2020-10-29 13:18:41,049 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 11 [2020-10-29 13:18:41,050 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-29 13:18:41,050 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:18:41,050 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:18:41,050 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-29 13:18:41,051 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-29 13:18:41,051 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 36 [2020-10-29 13:18:41,051 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 13:18:41,622 WARN L193 SmtUtils]: Spent 491.00 ms on a formula simplification that was a NOOP. DAG size: 247 [2020-10-29 13:18:41,624 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:18:41,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:18:41,650 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:18:41,682 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:18:41,683 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:18:41,683 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:18:41,683 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 40 [2020-10-29 13:18:41,683 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:18:41,684 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:18:41,684 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 13:18:41,684 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:18:41,684 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-29 13:18:41,684 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:18:41,711 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 13:18:41,711 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [562732736] [2020-10-29 13:18:41,711 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:18:41,712 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-29 13:18:41,712 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [174713811] [2020-10-29 13:18:41,712 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-29 13:18:41,713 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:18:41,713 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-29 13:18:41,714 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-29 13:18:41,714 INFO L87 Difference]: Start difference. First operand 357 states and 473 transitions. Second operand 6 states. [2020-10-29 13:18:42,301 WARN L193 SmtUtils]: Spent 519.00 ms on a formula simplification that was a NOOP. DAG size: 255 [2020-10-29 13:18:44,008 WARN L193 SmtUtils]: Spent 557.00 ms on a formula simplification that was a NOOP. DAG size: 253 [2020-10-29 13:18:44,448 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:18:44,449 INFO L93 Difference]: Finished difference Result 825 states and 1135 transitions. [2020-10-29 13:18:44,450 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-29 13:18:44,451 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 66 [2020-10-29 13:18:44,451 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:18:44,459 INFO L225 Difference]: With dead ends: 825 [2020-10-29 13:18:44,459 INFO L226 Difference]: Without dead ends: 530 [2020-10-29 13:18:44,461 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2020-10-29 13:18:44,462 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 530 states. [2020-10-29 13:18:44,513 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 530 to 505. [2020-10-29 13:18:44,514 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 505 states. [2020-10-29 13:18:44,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 505 states to 505 states and 699 transitions. [2020-10-29 13:18:44,517 INFO L78 Accepts]: Start accepts. Automaton has 505 states and 699 transitions. Word has length 66 [2020-10-29 13:18:44,521 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:18:44,522 INFO L481 AbstractCegarLoop]: Abstraction has 505 states and 699 transitions. [2020-10-29 13:18:44,522 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-29 13:18:44,522 INFO L276 IsEmpty]: Start isEmpty. Operand 505 states and 699 transitions. [2020-10-29 13:18:44,528 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-10-29 13:18:44,528 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:18:44,529 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 13:18:44,529 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-29 13:18:44,529 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:18:44,530 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:18:44,530 INFO L82 PathProgramCache]: Analyzing trace with hash 1589400918, now seen corresponding path program 1 times [2020-10-29 13:18:44,530 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:18:44,531 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [564407624] [2020-10-29 13:18:44,531 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:18:44,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:18:44,618 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:18:44,682 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:18:44,807 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:18:44,915 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:18:45,603 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:18:45,706 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:18:46,448 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:18:46,594 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:18:46,929 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:18:48,038 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:18:49,085 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:18:49,158 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:18:49,589 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:18:49,589 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 75 [2020-10-29 13:18:49,589 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 12 [2020-10-29 13:18:49,590 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-29 13:18:49,590 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:18:49,591 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:18:49,591 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-29 13:18:49,591 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 13:18:49,591 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 46 [2020-10-29 13:18:49,591 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 13:18:50,170 WARN L193 SmtUtils]: Spent 432.00 ms on a formula simplification that was a NOOP. DAG size: 247 [2020-10-29 13:18:50,172 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:18:50,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:18:50,184 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:18:50,196 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:18:50,197 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:18:50,197 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:18:50,197 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 15 [2020-10-29 13:18:50,197 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:18:50,198 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:18:50,198 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 13:18:50,198 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:18:50,198 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 13:18:50,198 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:18:50,226 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 13:18:50,226 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [564407624] [2020-10-29 13:18:50,226 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:18:50,226 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-29 13:18:50,227 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1758739384] [2020-10-29 13:18:50,227 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-29 13:18:50,227 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:18:50,228 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-29 13:18:50,228 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-10-29 13:18:50,228 INFO L87 Difference]: Start difference. First operand 505 states and 699 transitions. Second operand 7 states. [2020-10-29 13:18:50,816 WARN L193 SmtUtils]: Spent 510.00 ms on a formula simplification that was a NOOP. DAG size: 257 [2020-10-29 13:18:52,356 WARN L193 SmtUtils]: Spent 539.00 ms on a formula simplification that was a NOOP. DAG size: 255 [2020-10-29 13:18:53,014 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:18:53,015 INFO L93 Difference]: Finished difference Result 1114 states and 1562 transitions. [2020-10-29 13:18:53,015 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-29 13:18:53,016 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 67 [2020-10-29 13:18:53,016 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:18:53,021 INFO L225 Difference]: With dead ends: 1114 [2020-10-29 13:18:53,021 INFO L226 Difference]: Without dead ends: 783 [2020-10-29 13:18:53,022 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2020-10-29 13:18:53,024 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 783 states. [2020-10-29 13:18:53,062 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 783 to 505. [2020-10-29 13:18:53,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 505 states. [2020-10-29 13:18:53,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 505 states to 505 states and 698 transitions. [2020-10-29 13:18:53,065 INFO L78 Accepts]: Start accepts. Automaton has 505 states and 698 transitions. Word has length 67 [2020-10-29 13:18:53,065 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:18:53,066 INFO L481 AbstractCegarLoop]: Abstraction has 505 states and 698 transitions. [2020-10-29 13:18:53,066 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-29 13:18:53,066 INFO L276 IsEmpty]: Start isEmpty. Operand 505 states and 698 transitions. [2020-10-29 13:18:53,067 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-10-29 13:18:53,067 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:18:53,067 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 13:18:53,068 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-29 13:18:53,068 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:18:53,068 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:18:53,068 INFO L82 PathProgramCache]: Analyzing trace with hash 993484444, now seen corresponding path program 1 times [2020-10-29 13:18:53,069 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:18:53,069 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2125464511] [2020-10-29 13:18:53,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:18:53,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:18:53,128 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:18:53,174 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:18:53,267 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:18:53,491 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:18:53,640 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:18:53,732 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:18:54,070 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:18:54,574 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:18:56,005 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:18:56,128 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:18:56,361 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:18:57,357 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:18:57,578 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:18:57,649 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:18:57,878 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:18:58,110 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:18:58,110 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 75 [2020-10-29 13:18:58,110 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 15 [2020-10-29 13:18:58,111 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-29 13:18:58,111 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:18:58,111 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:18:58,111 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-29 13:18:58,111 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 13:18:58,111 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 48 [2020-10-29 13:18:58,112 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:18:58,879 WARN L193 SmtUtils]: Spent 584.00 ms on a formula simplification that was a NOOP. DAG size: 247 [2020-10-29 13:18:58,881 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:18:58,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:18:58,892 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:18:58,913 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:18:58,914 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:18:58,914 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:18:58,914 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 24 [2020-10-29 13:18:58,914 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:18:58,915 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:18:58,915 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 13:18:58,915 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:18:58,915 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 13:18:58,915 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:18:58,955 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 13:18:58,956 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2125464511] [2020-10-29 13:18:58,956 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:18:58,956 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-10-29 13:18:58,956 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [883411515] [2020-10-29 13:18:58,957 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-29 13:18:58,957 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:18:58,958 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-29 13:18:58,958 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2020-10-29 13:18:58,958 INFO L87 Difference]: Start difference. First operand 505 states and 698 transitions. Second operand 8 states. [2020-10-29 13:18:59,534 WARN L193 SmtUtils]: Spent 507.00 ms on a formula simplification that was a NOOP. DAG size: 257 [2020-10-29 13:19:00,884 WARN L193 SmtUtils]: Spent 524.00 ms on a formula simplification that was a NOOP. DAG size: 259 [2020-10-29 13:19:01,486 WARN L193 SmtUtils]: Spent 480.00 ms on a formula simplification that was a NOOP. DAG size: 260 [2020-10-29 13:19:01,917 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:19:01,918 INFO L93 Difference]: Finished difference Result 966 states and 1373 transitions. [2020-10-29 13:19:01,918 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-29 13:19:01,918 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 67 [2020-10-29 13:19:01,921 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:19:01,926 INFO L225 Difference]: With dead ends: 966 [2020-10-29 13:19:01,926 INFO L226 Difference]: Without dead ends: 654 [2020-10-29 13:19:01,927 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=58, Invalid=152, Unknown=0, NotChecked=0, Total=210 [2020-10-29 13:19:01,929 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 654 states. [2020-10-29 13:19:01,974 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 654 to 400. [2020-10-29 13:19:01,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 400 states. [2020-10-29 13:19:01,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 400 states to 400 states and 547 transitions. [2020-10-29 13:19:01,979 INFO L78 Accepts]: Start accepts. Automaton has 400 states and 547 transitions. Word has length 67 [2020-10-29 13:19:01,979 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:19:01,979 INFO L481 AbstractCegarLoop]: Abstraction has 400 states and 547 transitions. [2020-10-29 13:19:01,979 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-29 13:19:01,980 INFO L276 IsEmpty]: Start isEmpty. Operand 400 states and 547 transitions. [2020-10-29 13:19:01,981 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2020-10-29 13:19:01,981 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:19:01,981 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 13:19:01,981 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-29 13:19:01,982 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:19:01,982 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:19:01,982 INFO L82 PathProgramCache]: Analyzing trace with hash -1588160769, now seen corresponding path program 1 times [2020-10-29 13:19:01,982 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:19:01,983 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1468358157] [2020-10-29 13:19:01,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:19:02,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:19:02,046 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:19:02,114 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:19:02,213 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:19:02,282 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:19:02,681 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:19:02,789 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:19:05,025 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:19:05,297 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:19:05,472 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:19:05,590 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:19:07,025 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:19:07,026 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 77 [2020-10-29 13:19:07,026 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 10 [2020-10-29 13:19:07,026 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-29 13:19:07,026 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:19:07,026 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:19:07,026 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-29 13:19:07,026 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 13:19:07,027 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 59 [2020-10-29 13:19:07,027 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:19:07,796 WARN L193 SmtUtils]: Spent 642.00 ms on a formula simplification that was a NOOP. DAG size: 247 [2020-10-29 13:19:07,797 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:19:07,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:19:07,809 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:19:07,822 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:19:07,823 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:19:07,823 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:19:07,823 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 16 [2020-10-29 13:19:07,823 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:19:07,823 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:19:07,824 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 13:19:07,824 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:19:07,824 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 13:19:07,824 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:19:07,858 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 13:19:07,858 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1468358157] [2020-10-29 13:19:07,860 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:19:07,860 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-10-29 13:19:07,860 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [497326154] [2020-10-29 13:19:07,861 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-29 13:19:07,861 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:19:07,862 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-29 13:19:07,862 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-10-29 13:19:07,862 INFO L87 Difference]: Start difference. First operand 400 states and 547 transitions. Second operand 8 states. [2020-10-29 13:19:08,454 WARN L193 SmtUtils]: Spent 513.00 ms on a formula simplification that was a NOOP. DAG size: 259 [2020-10-29 13:19:09,882 WARN L193 SmtUtils]: Spent 592.00 ms on a formula simplification that was a NOOP. DAG size: 255 [2020-10-29 13:19:10,984 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:19:10,984 INFO L93 Difference]: Finished difference Result 850 states and 1214 transitions. [2020-10-29 13:19:10,984 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-29 13:19:10,985 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 69 [2020-10-29 13:19:10,985 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:19:10,990 INFO L225 Difference]: With dead ends: 850 [2020-10-29 13:19:10,990 INFO L226 Difference]: Without dead ends: 844 [2020-10-29 13:19:10,991 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2020-10-29 13:19:10,993 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 844 states. [2020-10-29 13:19:11,039 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 844 to 400. [2020-10-29 13:19:11,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 400 states. [2020-10-29 13:19:11,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 400 states to 400 states and 546 transitions. [2020-10-29 13:19:11,042 INFO L78 Accepts]: Start accepts. Automaton has 400 states and 546 transitions. Word has length 69 [2020-10-29 13:19:11,043 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:19:11,043 INFO L481 AbstractCegarLoop]: Abstraction has 400 states and 546 transitions. [2020-10-29 13:19:11,043 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-29 13:19:11,043 INFO L276 IsEmpty]: Start isEmpty. Operand 400 states and 546 transitions. [2020-10-29 13:19:11,044 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2020-10-29 13:19:11,044 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:19:11,044 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 13:19:11,045 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-29 13:19:11,045 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:19:11,045 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:19:11,045 INFO L82 PathProgramCache]: Analyzing trace with hash -639750942, now seen corresponding path program 1 times [2020-10-29 13:19:11,046 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:19:11,046 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [608977760] [2020-10-29 13:19:11,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:19:11,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:19:11,109 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:19:11,171 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:19:11,255 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:19:11,363 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:19:11,780 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:19:11,883 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:19:13,107 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:19:13,150 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:19:14,253 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:19:14,462 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:19:14,650 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:19:14,811 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:19:16,095 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:19:16,095 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 77 [2020-10-29 13:19:16,095 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 12 [2020-10-29 13:19:16,095 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5011 [2020-10-29 13:19:16,095 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:19:16,095 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:19:16,096 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-29 13:19:16,096 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 13:19:16,096 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 51 [2020-10-29 13:19:16,096 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:19:16,656 WARN L193 SmtUtils]: Spent 469.00 ms on a formula simplification that was a NOOP. DAG size: 247 [2020-10-29 13:19:16,657 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:19:16,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:19:16,667 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:19:16,677 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:19:16,677 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:19:16,677 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:19:16,678 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12 [2020-10-29 13:19:16,678 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:19:16,678 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:19:16,678 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 13:19:16,678 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:19:16,678 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 13:19:16,678 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:19:16,698 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 13:19:16,698 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [608977760] [2020-10-29 13:19:16,699 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:19:16,699 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-10-29 13:19:16,699 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [98647787] [2020-10-29 13:19:16,699 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-29 13:19:16,699 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:19:16,700 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-29 13:19:16,700 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2020-10-29 13:19:16,700 INFO L87 Difference]: Start difference. First operand 400 states and 546 transitions. Second operand 8 states. [2020-10-29 13:19:17,252 WARN L193 SmtUtils]: Spent 492.00 ms on a formula simplification that was a NOOP. DAG size: 253 [2020-10-29 13:19:18,898 WARN L193 SmtUtils]: Spent 504.00 ms on a formula simplification that was a NOOP. DAG size: 249 [2020-10-29 13:19:19,536 WARN L193 SmtUtils]: Spent 546.00 ms on a formula simplification that was a NOOP. DAG size: 255 [2020-10-29 13:19:21,233 WARN L193 SmtUtils]: Spent 474.00 ms on a formula simplification that was a NOOP. DAG size: 248 [2020-10-29 13:19:21,774 WARN L193 SmtUtils]: Spent 512.00 ms on a formula simplification that was a NOOP. DAG size: 254 [2020-10-29 13:19:22,023 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:19:22,023 INFO L93 Difference]: Finished difference Result 3240 states and 4732 transitions. [2020-10-29 13:19:22,023 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-29 13:19:22,024 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 69 [2020-10-29 13:19:22,024 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:19:22,039 INFO L225 Difference]: With dead ends: 3240 [2020-10-29 13:19:22,040 INFO L226 Difference]: Without dead ends: 2912 [2020-10-29 13:19:22,042 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=120, Invalid=386, Unknown=0, NotChecked=0, Total=506 [2020-10-29 13:19:22,046 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2912 states. [2020-10-29 13:19:22,127 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2912 to 410. [2020-10-29 13:19:22,127 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 410 states. [2020-10-29 13:19:22,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 410 states to 410 states and 553 transitions. [2020-10-29 13:19:22,130 INFO L78 Accepts]: Start accepts. Automaton has 410 states and 553 transitions. Word has length 69 [2020-10-29 13:19:22,130 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:19:22,130 INFO L481 AbstractCegarLoop]: Abstraction has 410 states and 553 transitions. [2020-10-29 13:19:22,130 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-29 13:19:22,130 INFO L276 IsEmpty]: Start isEmpty. Operand 410 states and 553 transitions. [2020-10-29 13:19:22,131 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2020-10-29 13:19:22,131 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:19:22,131 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 13:19:22,132 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-29 13:19:22,132 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:19:22,132 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:19:22,132 INFO L82 PathProgramCache]: Analyzing trace with hash -1523499693, now seen corresponding path program 1 times [2020-10-29 13:19:22,133 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:19:22,133 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1479446495] [2020-10-29 13:19:22,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:19:22,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:19:22,189 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:19:22,251 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:19:22,923 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:19:22,995 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:19:23,237 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:19:27,178 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:19:27,178 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 77 [2020-10-29 13:19:27,178 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-29 13:19:27,178 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5011 [2020-10-29 13:19:27,178 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:19:27,179 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:19:27,179 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-29 13:19:27,179 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 13:19:27,179 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 60 [2020-10-29 13:19:27,179 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:19:27,873 WARN L193 SmtUtils]: Spent 534.00 ms on a formula simplification that was a NOOP. DAG size: 247 [2020-10-29 13:19:27,874 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:19:27,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:19:27,887 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:19:27,897 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:19:27,898 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:19:27,898 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:19:27,898 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 16 [2020-10-29 13:19:27,898 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:19:27,899 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:19:27,899 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 13:19:27,899 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:19:27,899 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 13:19:27,899 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:19:27,933 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 13:19:27,934 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1479446495] [2020-10-29 13:19:27,934 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:19:27,934 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-10-29 13:19:27,935 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1493980215] [2020-10-29 13:19:27,935 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-29 13:19:27,935 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:19:27,937 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-29 13:19:27,940 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2020-10-29 13:19:27,940 INFO L87 Difference]: Start difference. First operand 410 states and 553 transitions. Second operand 9 states. [2020-10-29 13:19:28,519 WARN L193 SmtUtils]: Spent 511.00 ms on a formula simplification that was a NOOP. DAG size: 253 [2020-10-29 13:19:29,945 WARN L193 SmtUtils]: Spent 559.00 ms on a formula simplification that was a NOOP. DAG size: 255 [2020-10-29 13:19:30,530 WARN L193 SmtUtils]: Spent 496.00 ms on a formula simplification that was a NOOP. DAG size: 256 [2020-10-29 13:19:30,948 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:19:30,948 INFO L93 Difference]: Finished difference Result 744 states and 1044 transitions. [2020-10-29 13:19:30,949 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-29 13:19:30,949 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 69 [2020-10-29 13:19:30,949 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:19:30,952 INFO L225 Difference]: With dead ends: 744 [2020-10-29 13:19:30,952 INFO L226 Difference]: Without dead ends: 532 [2020-10-29 13:19:30,954 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=67, Invalid=205, Unknown=0, NotChecked=0, Total=272 [2020-10-29 13:19:30,955 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 532 states. [2020-10-29 13:19:31,007 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 532 to 401. [2020-10-29 13:19:31,007 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 401 states. [2020-10-29 13:19:31,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 401 states to 401 states and 538 transitions. [2020-10-29 13:19:31,009 INFO L78 Accepts]: Start accepts. Automaton has 401 states and 538 transitions. Word has length 69 [2020-10-29 13:19:31,009 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:19:31,009 INFO L481 AbstractCegarLoop]: Abstraction has 401 states and 538 transitions. [2020-10-29 13:19:31,010 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-29 13:19:31,010 INFO L276 IsEmpty]: Start isEmpty. Operand 401 states and 538 transitions. [2020-10-29 13:19:31,010 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2020-10-29 13:19:31,010 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:19:31,011 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 13:19:31,011 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-29 13:19:31,011 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:19:31,011 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:19:31,012 INFO L82 PathProgramCache]: Analyzing trace with hash 1697015220, now seen corresponding path program 1 times [2020-10-29 13:19:31,012 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:19:31,012 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2098860272] [2020-10-29 13:19:31,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:19:31,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:19:31,055 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:19:31,100 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:19:31,162 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:19:31,539 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:19:31,972 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:19:32,056 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:19:32,331 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:19:32,511 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:19:32,595 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:19:33,459 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:19:33,639 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:19:33,840 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:19:33,926 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:19:35,340 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:19:36,041 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:19:36,041 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 78 [2020-10-29 13:19:36,041 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 14 [2020-10-29 13:19:36,042 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4999 [2020-10-29 13:19:36,042 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:19:36,042 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:19:36,042 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-29 13:19:36,042 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 13:19:36,042 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 58 [2020-10-29 13:19:36,043 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:19:36,613 WARN L193 SmtUtils]: Spent 449.00 ms on a formula simplification that was a NOOP. DAG size: 247 [2020-10-29 13:19:36,614 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:19:36,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:19:36,625 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:19:36,636 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:19:36,636 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:19:36,636 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:19:36,637 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 13 [2020-10-29 13:19:36,637 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:19:36,637 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:19:36,637 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 13:19:36,637 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:19:36,637 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 13:19:36,638 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:19:36,667 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 13:19:36,668 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2098860272] [2020-10-29 13:19:36,668 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:19:36,668 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-10-29 13:19:36,668 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [961831117] [2020-10-29 13:19:36,669 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-29 13:19:36,669 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:19:36,670 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-29 13:19:36,670 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-10-29 13:19:36,670 INFO L87 Difference]: Start difference. First operand 401 states and 538 transitions. Second operand 8 states. [2020-10-29 13:19:37,243 WARN L193 SmtUtils]: Spent 496.00 ms on a formula simplification that was a NOOP. DAG size: 259 [2020-10-29 13:19:38,558 WARN L193 SmtUtils]: Spent 522.00 ms on a formula simplification that was a NOOP. DAG size: 255 [2020-10-29 13:19:39,047 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:19:39,048 INFO L93 Difference]: Finished difference Result 540 states and 730 transitions. [2020-10-29 13:19:39,050 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-29 13:19:39,050 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 70 [2020-10-29 13:19:39,050 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:19:39,053 INFO L225 Difference]: With dead ends: 540 [2020-10-29 13:19:39,053 INFO L226 Difference]: Without dead ends: 532 [2020-10-29 13:19:39,055 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=60, Invalid=150, Unknown=0, NotChecked=0, Total=210 [2020-10-29 13:19:39,056 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 532 states. [2020-10-29 13:19:39,109 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 532 to 401. [2020-10-29 13:19:39,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 401 states. [2020-10-29 13:19:39,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 401 states to 401 states and 537 transitions. [2020-10-29 13:19:39,111 INFO L78 Accepts]: Start accepts. Automaton has 401 states and 537 transitions. Word has length 70 [2020-10-29 13:19:39,111 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:19:39,111 INFO L481 AbstractCegarLoop]: Abstraction has 401 states and 537 transitions. [2020-10-29 13:19:39,112 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-29 13:19:39,112 INFO L276 IsEmpty]: Start isEmpty. Operand 401 states and 537 transitions. [2020-10-29 13:19:39,112 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2020-10-29 13:19:39,113 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:19:39,113 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 13:19:39,113 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-29 13:19:39,113 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:19:39,114 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:19:39,114 INFO L82 PathProgramCache]: Analyzing trace with hash -1600118731, now seen corresponding path program 1 times [2020-10-29 13:19:39,114 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:19:39,114 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [864804507] [2020-10-29 13:19:39,114 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:19:39,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:19:39,167 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:19:39,202 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:19:39,278 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:19:39,621 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:19:39,825 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:19:44,146 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:19:44,147 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 78 [2020-10-29 13:19:44,147 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-29 13:19:44,147 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4999 [2020-10-29 13:19:44,147 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:19:44,147 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:19:44,147 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-29 13:19:44,148 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 13:19:44,148 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 54 [2020-10-29 13:19:44,148 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:19:44,732 WARN L193 SmtUtils]: Spent 487.00 ms on a formula simplification that was a NOOP. DAG size: 247 [2020-10-29 13:19:44,733 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:19:44,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:19:44,745 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:19:44,756 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:19:44,757 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:19:44,757 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:19:44,757 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 14 [2020-10-29 13:19:44,757 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:19:44,758 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:19:44,758 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 13:19:44,758 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:19:44,758 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 13:19:44,758 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:19:44,784 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 13:19:44,785 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [864804507] [2020-10-29 13:19:44,785 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:19:44,785 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-10-29 13:19:44,785 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2073765575] [2020-10-29 13:19:44,786 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-29 13:19:44,786 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:19:44,787 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-29 13:19:44,787 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-10-29 13:19:44,787 INFO L87 Difference]: Start difference. First operand 401 states and 537 transitions. Second operand 8 states. [2020-10-29 13:19:45,375 WARN L193 SmtUtils]: Spent 512.00 ms on a formula simplification that was a NOOP. DAG size: 259 [2020-10-29 13:19:46,674 WARN L193 SmtUtils]: Spent 506.00 ms on a formula simplification that was a NOOP. DAG size: 255 [2020-10-29 13:19:47,385 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:19:47,385 INFO L93 Difference]: Finished difference Result 1076 states and 1529 transitions. [2020-10-29 13:19:47,385 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-29 13:19:47,386 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 70 [2020-10-29 13:19:47,386 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:19:47,390 INFO L225 Difference]: With dead ends: 1076 [2020-10-29 13:19:47,390 INFO L226 Difference]: Without dead ends: 840 [2020-10-29 13:19:47,392 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2020-10-29 13:19:47,393 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 840 states. [2020-10-29 13:19:47,452 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 840 to 401. [2020-10-29 13:19:47,452 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 401 states. [2020-10-29 13:19:47,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 401 states to 401 states and 535 transitions. [2020-10-29 13:19:47,454 INFO L78 Accepts]: Start accepts. Automaton has 401 states and 535 transitions. Word has length 70 [2020-10-29 13:19:47,454 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:19:47,454 INFO L481 AbstractCegarLoop]: Abstraction has 401 states and 535 transitions. [2020-10-29 13:19:47,455 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-29 13:19:47,455 INFO L276 IsEmpty]: Start isEmpty. Operand 401 states and 535 transitions. [2020-10-29 13:19:47,455 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2020-10-29 13:19:47,456 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:19:47,456 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 13:19:47,456 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-29 13:19:47,456 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:19:47,457 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:19:47,457 INFO L82 PathProgramCache]: Analyzing trace with hash 1747304089, now seen corresponding path program 1 times [2020-10-29 13:19:47,457 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:19:47,457 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1387332655] [2020-10-29 13:19:47,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:19:47,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:19:47,517 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:19:47,600 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:19:47,783 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:19:47,948 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:19:48,025 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:19:48,384 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:19:48,605 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:19:48,726 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:19:48,904 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:19:49,698 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:19:50,273 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:19:50,333 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:19:50,727 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:19:52,499 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:19:52,500 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 78 [2020-10-29 13:19:52,500 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 13 [2020-10-29 13:19:52,500 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5006 [2020-10-29 13:19:52,500 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:19:52,500 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:19:52,500 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-29 13:19:52,501 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 13:19:52,501 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 56 [2020-10-29 13:19:52,501 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:19:53,174 WARN L193 SmtUtils]: Spent 507.00 ms on a formula simplification that was a NOOP. DAG size: 247 [2020-10-29 13:19:53,175 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:19:53,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:19:53,184 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:19:53,197 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:19:53,197 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:19:53,197 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:19:53,197 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 14 [2020-10-29 13:19:53,197 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:19:53,198 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:19:53,198 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 13:19:53,198 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:19:53,198 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 13:19:53,198 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:19:53,223 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 13:19:53,223 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1387332655] [2020-10-29 13:19:53,224 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:19:53,224 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-10-29 13:19:53,224 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [972592830] [2020-10-29 13:19:53,224 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-29 13:19:53,225 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:19:53,225 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-29 13:19:53,225 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-10-29 13:19:53,225 INFO L87 Difference]: Start difference. First operand 401 states and 535 transitions. Second operand 8 states. [2020-10-29 13:19:53,888 WARN L193 SmtUtils]: Spent 571.00 ms on a formula simplification that was a NOOP. DAG size: 267 [2020-10-29 13:19:55,299 WARN L193 SmtUtils]: Spent 535.00 ms on a formula simplification that was a NOOP. DAG size: 258 [2020-10-29 13:19:56,362 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:19:56,362 INFO L93 Difference]: Finished difference Result 857 states and 1201 transitions. [2020-10-29 13:19:56,363 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-29 13:19:56,363 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 70 [2020-10-29 13:19:56,364 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:19:56,368 INFO L225 Difference]: With dead ends: 857 [2020-10-29 13:19:56,368 INFO L226 Difference]: Without dead ends: 840 [2020-10-29 13:19:56,369 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2020-10-29 13:19:56,370 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 840 states. [2020-10-29 13:19:56,431 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 840 to 401. [2020-10-29 13:19:56,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 401 states. [2020-10-29 13:19:56,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 401 states to 401 states and 534 transitions. [2020-10-29 13:19:56,433 INFO L78 Accepts]: Start accepts. Automaton has 401 states and 534 transitions. Word has length 70 [2020-10-29 13:19:56,433 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:19:56,433 INFO L481 AbstractCegarLoop]: Abstraction has 401 states and 534 transitions. [2020-10-29 13:19:56,433 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-29 13:19:56,433 INFO L276 IsEmpty]: Start isEmpty. Operand 401 states and 534 transitions. [2020-10-29 13:19:56,434 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2020-10-29 13:19:56,434 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:19:56,435 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 13:19:56,435 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-29 13:19:56,435 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:19:56,435 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:19:56,435 INFO L82 PathProgramCache]: Analyzing trace with hash 500841239, now seen corresponding path program 1 times [2020-10-29 13:19:56,436 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:19:56,436 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1512632079] [2020-10-29 13:19:56,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:19:56,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:19:56,486 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:19:56,540 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:19:56,821 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:19:58,289 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:19:58,289 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 80 [2020-10-29 13:19:58,289 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-29 13:19:58,289 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1823 [2020-10-29 13:19:58,290 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:19:58,290 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:19:58,290 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-29 13:19:58,290 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 13:19:58,290 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 61 [2020-10-29 13:19:58,290 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:19:58,901 WARN L193 SmtUtils]: Spent 484.00 ms on a formula simplification that was a NOOP. DAG size: 247 [2020-10-29 13:19:58,902 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:19:58,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:19:58,910 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:19:58,920 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:19:58,920 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:19:58,920 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:19:58,921 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12 [2020-10-29 13:19:58,921 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:19:58,921 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:19:58,921 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 13:19:58,921 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:19:58,921 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 13:19:58,922 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:19:58,950 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 13:19:58,950 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1512632079] [2020-10-29 13:19:58,950 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:19:58,951 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-10-29 13:19:58,951 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1180436551] [2020-10-29 13:19:58,951 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-29 13:19:58,951 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:19:58,952 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-29 13:19:58,952 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2020-10-29 13:19:58,952 INFO L87 Difference]: Start difference. First operand 401 states and 534 transitions. Second operand 9 states. [2020-10-29 13:19:59,546 WARN L193 SmtUtils]: Spent 536.00 ms on a formula simplification that was a NOOP. DAG size: 254 [2020-10-29 13:20:01,057 WARN L193 SmtUtils]: Spent 526.00 ms on a formula simplification that was a NOOP. DAG size: 256 [2020-10-29 13:20:01,602 WARN L193 SmtUtils]: Spent 511.00 ms on a formula simplification that was a NOOP. DAG size: 257 [2020-10-29 13:20:02,431 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:20:02,431 INFO L93 Difference]: Finished difference Result 834 states and 1176 transitions. [2020-10-29 13:20:02,432 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-29 13:20:02,432 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 72 [2020-10-29 13:20:02,432 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:20:02,435 INFO L225 Difference]: With dead ends: 834 [2020-10-29 13:20:02,435 INFO L226 Difference]: Without dead ends: 827 [2020-10-29 13:20:02,436 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=72, Invalid=234, Unknown=0, NotChecked=0, Total=306 [2020-10-29 13:20:02,436 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 827 states. [2020-10-29 13:20:02,506 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 827 to 396. [2020-10-29 13:20:02,506 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 396 states. [2020-10-29 13:20:02,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 396 states to 396 states and 525 transitions. [2020-10-29 13:20:02,508 INFO L78 Accepts]: Start accepts. Automaton has 396 states and 525 transitions. Word has length 72 [2020-10-29 13:20:02,508 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:20:02,508 INFO L481 AbstractCegarLoop]: Abstraction has 396 states and 525 transitions. [2020-10-29 13:20:02,508 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-29 13:20:02,509 INFO L276 IsEmpty]: Start isEmpty. Operand 396 states and 525 transitions. [2020-10-29 13:20:02,509 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2020-10-29 13:20:02,510 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:20:02,510 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 13:20:02,510 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-29 13:20:02,510 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:20:02,511 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:20:02,511 INFO L82 PathProgramCache]: Analyzing trace with hash -763659939, now seen corresponding path program 1 times [2020-10-29 13:20:02,511 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:20:02,511 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1469135398] [2020-10-29 13:20:02,511 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:20:02,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:20:02,568 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:20:02,629 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:20:03,725 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:20:03,725 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 80 [2020-10-29 13:20:03,726 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 13:20:03,726 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1180 [2020-10-29 13:20:03,726 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:20:03,726 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:20:03,726 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-29 13:20:03,726 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 13:20:03,727 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 56 [2020-10-29 13:20:03,727 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:20:04,426 WARN L193 SmtUtils]: Spent 520.00 ms on a formula simplification that was a NOOP. DAG size: 247 [2020-10-29 13:20:04,427 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:20:04,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:20:04,439 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:20:04,448 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:20:04,448 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:20:04,448 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:20:04,449 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-10-29 13:20:04,449 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:20:04,449 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:20:04,449 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 13:20:04,449 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:20:04,449 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 13:20:04,450 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:20:04,484 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 13:20:04,485 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1469135398] [2020-10-29 13:20:04,485 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:20:04,485 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-10-29 13:20:04,485 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1125558806] [2020-10-29 13:20:04,486 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-29 13:20:04,486 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:20:04,486 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-29 13:20:04,487 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2020-10-29 13:20:04,487 INFO L87 Difference]: Start difference. First operand 396 states and 525 transitions. Second operand 9 states. [2020-10-29 13:20:05,100 WARN L193 SmtUtils]: Spent 538.00 ms on a formula simplification that was a NOOP. DAG size: 261 [2020-10-29 13:20:06,434 WARN L193 SmtUtils]: Spent 543.00 ms on a formula simplification that was a NOOP. DAG size: 258 [2020-10-29 13:20:07,443 WARN L193 SmtUtils]: Spent 519.00 ms on a formula simplification that was a NOOP. DAG size: 256 [2020-10-29 13:20:07,495 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:20:07,495 INFO L93 Difference]: Finished difference Result 813 states and 1148 transitions. [2020-10-29 13:20:07,496 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-29 13:20:07,496 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 72 [2020-10-29 13:20:07,496 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:20:07,500 INFO L225 Difference]: With dead ends: 813 [2020-10-29 13:20:07,500 INFO L226 Difference]: Without dead ends: 800 [2020-10-29 13:20:07,501 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=64, Invalid=208, Unknown=0, NotChecked=0, Total=272 [2020-10-29 13:20:07,502 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 800 states. [2020-10-29 13:20:07,591 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 800 to 385. [2020-10-29 13:20:07,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 385 states. [2020-10-29 13:20:07,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 385 states to 385 states and 511 transitions. [2020-10-29 13:20:07,593 INFO L78 Accepts]: Start accepts. Automaton has 385 states and 511 transitions. Word has length 72 [2020-10-29 13:20:07,594 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:20:07,594 INFO L481 AbstractCegarLoop]: Abstraction has 385 states and 511 transitions. [2020-10-29 13:20:07,594 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-29 13:20:07,594 INFO L276 IsEmpty]: Start isEmpty. Operand 385 states and 511 transitions. [2020-10-29 13:20:07,595 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2020-10-29 13:20:07,595 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:20:07,596 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 13:20:07,596 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-29 13:20:07,596 INFO L429 AbstractCegarLoop]: === Iteration 14 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:20:07,596 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:20:07,597 INFO L82 PathProgramCache]: Analyzing trace with hash -1984746052, now seen corresponding path program 1 times [2020-10-29 13:20:07,597 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:20:07,597 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2015138326] [2020-10-29 13:20:07,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:20:07,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:20:07,672 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:20:07,900 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:20:08,145 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:20:08,269 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:20:08,423 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:20:09,612 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:20:11,935 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:20:11,936 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 80 [2020-10-29 13:20:11,936 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-29 13:20:11,955 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4295 [2020-10-29 13:20:11,956 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:20:11,956 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:20:11,956 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-29 13:20:11,956 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 13:20:11,956 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 54 [2020-10-29 13:20:11,956 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:20:12,563 WARN L193 SmtUtils]: Spent 481.00 ms on a formula simplification that was a NOOP. DAG size: 247 [2020-10-29 13:20:12,564 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:20:12,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:20:12,572 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:20:12,580 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:20:12,580 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:20:12,580 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:20:12,580 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-29 13:20:12,580 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:20:12,580 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:20:12,580 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 13:20:12,581 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:20:12,581 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 13:20:12,581 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:20:12,598 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 13:20:12,599 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2015138326] [2020-10-29 13:20:12,599 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:20:12,599 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-10-29 13:20:12,599 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [348444947] [2020-10-29 13:20:12,599 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-29 13:20:12,600 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:20:12,600 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-29 13:20:12,600 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2020-10-29 13:20:12,601 INFO L87 Difference]: Start difference. First operand 385 states and 511 transitions. Second operand 9 states. [2020-10-29 13:20:13,188 WARN L193 SmtUtils]: Spent 518.00 ms on a formula simplification that was a NOOP. DAG size: 254 [2020-10-29 13:20:16,058 WARN L193 SmtUtils]: Spent 508.00 ms on a formula simplification that was a NOOP. DAG size: 253 [2020-10-29 13:20:17,193 WARN L193 SmtUtils]: Spent 1.07 s on a formula simplification. DAG size of input: 259 DAG size of output: 256 [2020-10-29 13:20:17,270 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:20:17,271 INFO L93 Difference]: Finished difference Result 1345 states and 1908 transitions. [2020-10-29 13:20:17,271 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-29 13:20:17,271 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 72 [2020-10-29 13:20:17,272 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:20:17,275 INFO L225 Difference]: With dead ends: 1345 [2020-10-29 13:20:17,275 INFO L226 Difference]: Without dead ends: 1108 [2020-10-29 13:20:17,276 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=71, Invalid=235, Unknown=0, NotChecked=0, Total=306 [2020-10-29 13:20:17,278 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1108 states. [2020-10-29 13:20:17,354 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1108 to 355. [2020-10-29 13:20:17,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 355 states. [2020-10-29 13:20:17,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 355 states to 355 states and 473 transitions. [2020-10-29 13:20:17,355 INFO L78 Accepts]: Start accepts. Automaton has 355 states and 473 transitions. Word has length 72 [2020-10-29 13:20:17,356 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:20:17,356 INFO L481 AbstractCegarLoop]: Abstraction has 355 states and 473 transitions. [2020-10-29 13:20:17,356 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-29 13:20:17,356 INFO L276 IsEmpty]: Start isEmpty. Operand 355 states and 473 transitions. [2020-10-29 13:20:17,357 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2020-10-29 13:20:17,357 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:20:17,357 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 13:20:17,358 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-29 13:20:17,358 INFO L429 AbstractCegarLoop]: === Iteration 15 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:20:17,358 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:20:17,358 INFO L82 PathProgramCache]: Analyzing trace with hash 848127758, now seen corresponding path program 1 times [2020-10-29 13:20:17,359 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:20:17,359 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2134628589] [2020-10-29 13:20:17,359 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:20:17,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:20:17,418 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:20:17,482 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:20:17,530 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:20:17,575 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:20:17,692 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:20:17,739 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:20:17,990 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:20:18,045 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:20:18,071 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:20:22,392 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:20:22,393 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 103 [2020-10-29 13:20:22,393 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-29 13:20:22,393 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-29 13:20:22,393 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:20:22,394 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:20:22,394 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-29 13:20:22,394 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 13:20:22,394 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 59 [2020-10-29 13:20:22,394 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:20:22,977 WARN L193 SmtUtils]: Spent 482.00 ms on a formula simplification that was a NOOP. DAG size: 247 [2020-10-29 13:20:22,978 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:20:22,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:20:22,988 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:20:22,998 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:20:22,999 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:20:22,999 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:20:22,999 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12 [2020-10-29 13:20:22,999 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:20:22,999 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:20:22,999 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 13:20:23,000 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:20:23,000 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 13:20:23,000 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:20:23,026 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 13:20:23,026 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2134628589] [2020-10-29 13:20:23,027 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:20:23,027 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-10-29 13:20:23,027 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1996952726] [2020-10-29 13:20:23,027 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-29 13:20:23,027 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:20:23,028 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-29 13:20:23,028 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-10-29 13:20:23,028 INFO L87 Difference]: Start difference. First operand 355 states and 473 transitions. Second operand 8 states. [2020-10-29 13:20:23,641 WARN L193 SmtUtils]: Spent 539.00 ms on a formula simplification that was a NOOP. DAG size: 259 [2020-10-29 13:20:25,574 WARN L193 SmtUtils]: Spent 540.00 ms on a formula simplification that was a NOOP. DAG size: 255 [2020-10-29 13:20:25,608 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:20:25,608 INFO L93 Difference]: Finished difference Result 696 states and 968 transitions. [2020-10-29 13:20:25,608 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-29 13:20:25,609 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 95 [2020-10-29 13:20:25,609 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:20:25,611 INFO L225 Difference]: With dead ends: 696 [2020-10-29 13:20:25,611 INFO L226 Difference]: Without dead ends: 465 [2020-10-29 13:20:25,612 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2020-10-29 13:20:25,613 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 465 states. [2020-10-29 13:20:25,673 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 465 to 355. [2020-10-29 13:20:25,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 355 states. [2020-10-29 13:20:25,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 355 states to 355 states and 469 transitions. [2020-10-29 13:20:25,674 INFO L78 Accepts]: Start accepts. Automaton has 355 states and 469 transitions. Word has length 95 [2020-10-29 13:20:25,675 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:20:25,675 INFO L481 AbstractCegarLoop]: Abstraction has 355 states and 469 transitions. [2020-10-29 13:20:25,675 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-29 13:20:25,675 INFO L276 IsEmpty]: Start isEmpty. Operand 355 states and 469 transitions. [2020-10-29 13:20:25,676 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2020-10-29 13:20:25,676 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:20:25,676 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 13:20:25,676 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-29 13:20:25,677 INFO L429 AbstractCegarLoop]: === Iteration 16 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:20:25,677 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:20:25,677 INFO L82 PathProgramCache]: Analyzing trace with hash 368041575, now seen corresponding path program 1 times [2020-10-29 13:20:25,677 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:20:25,678 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1100199158] [2020-10-29 13:20:25,678 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:20:25,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:20:25,722 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:20:25,761 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:20:25,815 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:20:25,885 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:20:26,221 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:20:26,248 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:20:26,275 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:20:26,315 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:20:26,427 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:20:26,493 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:20:30,710 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:20:30,710 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 105 [2020-10-29 13:20:30,710 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 10 [2020-10-29 13:20:30,710 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-29 13:20:30,711 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:20:30,711 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:20:30,711 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-29 13:20:30,711 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-29 13:20:30,711 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 84 [2020-10-29 13:20:30,711 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:20:31,310 WARN L193 SmtUtils]: Spent 521.00 ms on a formula simplification that was a NOOP. DAG size: 247 [2020-10-29 13:20:31,313 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:20:31,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:20:31,322 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:20:31,329 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:20:31,329 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:20:31,330 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:20:31,330 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-29 13:20:31,330 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:20:31,330 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:20:31,330 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 13:20:31,330 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:20:31,330 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 13:20:31,330 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:20:31,361 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 13:20:31,361 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1100199158] [2020-10-29 13:20:31,361 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:20:31,362 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-29 13:20:31,362 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [692078287] [2020-10-29 13:20:31,362 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-29 13:20:31,362 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:20:31,363 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-29 13:20:31,363 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-10-29 13:20:31,363 INFO L87 Difference]: Start difference. First operand 355 states and 469 transitions. Second operand 7 states. [2020-10-29 13:20:31,987 WARN L193 SmtUtils]: Spent 554.00 ms on a formula simplification that was a NOOP. DAG size: 255 [2020-10-29 13:20:33,560 WARN L193 SmtUtils]: Spent 513.00 ms on a formula simplification that was a NOOP. DAG size: 249 [2020-10-29 13:20:34,158 WARN L193 SmtUtils]: Spent 538.00 ms on a formula simplification that was a NOOP. DAG size: 253 [2020-10-29 13:20:34,746 WARN L193 SmtUtils]: Spent 540.00 ms on a formula simplification that was a NOOP. DAG size: 251 [2020-10-29 13:20:35,345 WARN L193 SmtUtils]: Spent 511.00 ms on a formula simplification that was a NOOP. DAG size: 250 [2020-10-29 13:20:35,903 WARN L193 SmtUtils]: Spent 508.00 ms on a formula simplification that was a NOOP. DAG size: 251 [2020-10-29 13:20:36,476 WARN L193 SmtUtils]: Spent 535.00 ms on a formula simplification that was a NOOP. DAG size: 253 [2020-10-29 13:20:36,677 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:20:36,677 INFO L93 Difference]: Finished difference Result 2011 states and 2949 transitions. [2020-10-29 13:20:36,678 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-29 13:20:36,678 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 97 [2020-10-29 13:20:36,678 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:20:36,686 INFO L225 Difference]: With dead ends: 2011 [2020-10-29 13:20:36,686 INFO L226 Difference]: Without dead ends: 1804 [2020-10-29 13:20:36,688 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=106, Invalid=236, Unknown=0, NotChecked=0, Total=342 [2020-10-29 13:20:36,689 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1804 states. [2020-10-29 13:20:36,826 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1804 to 559. [2020-10-29 13:20:36,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 559 states. [2020-10-29 13:20:36,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 559 states to 559 states and 769 transitions. [2020-10-29 13:20:36,828 INFO L78 Accepts]: Start accepts. Automaton has 559 states and 769 transitions. Word has length 97 [2020-10-29 13:20:36,829 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:20:36,829 INFO L481 AbstractCegarLoop]: Abstraction has 559 states and 769 transitions. [2020-10-29 13:20:36,829 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-29 13:20:36,829 INFO L276 IsEmpty]: Start isEmpty. Operand 559 states and 769 transitions. [2020-10-29 13:20:36,831 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2020-10-29 13:20:36,831 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:20:36,831 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 13:20:36,831 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-29 13:20:36,832 INFO L429 AbstractCegarLoop]: === Iteration 17 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:20:36,832 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:20:36,832 INFO L82 PathProgramCache]: Analyzing trace with hash -1038698482, now seen corresponding path program 1 times [2020-10-29 13:20:36,832 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:20:36,832 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1743875618] [2020-10-29 13:20:36,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:20:36,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:20:36,878 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:20:36,937 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:20:36,979 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:20:37,050 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:20:37,122 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:20:37,795 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:20:37,866 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:20:37,997 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:20:41,869 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:20:41,869 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 107 [2020-10-29 13:20:41,869 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-29 13:20:41,870 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5008 [2020-10-29 13:20:41,870 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:20:41,870 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:20:41,870 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-29 13:20:41,870 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-29 13:20:41,870 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 69 [2020-10-29 13:20:41,870 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:20:42,439 WARN L193 SmtUtils]: Spent 504.00 ms on a formula simplification that was a NOOP. DAG size: 247 [2020-10-29 13:20:42,440 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:20:42,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:20:42,449 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:20:42,458 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:20:42,458 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:20:42,458 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:20:42,458 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-29 13:20:42,458 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:20:42,458 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:20:42,459 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 13:20:42,459 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:20:42,459 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 13:20:42,459 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:20:42,479 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 13:20:42,479 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1743875618] [2020-10-29 13:20:42,479 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:20:42,479 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-29 13:20:42,479 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [870969925] [2020-10-29 13:20:42,480 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-29 13:20:42,480 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:20:42,480 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-29 13:20:42,481 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-29 13:20:42,481 INFO L87 Difference]: Start difference. First operand 559 states and 769 transitions. Second operand 6 states. [2020-10-29 13:20:43,045 WARN L193 SmtUtils]: Spent 513.00 ms on a formula simplification that was a NOOP. DAG size: 248 [2020-10-29 13:20:46,038 WARN L193 SmtUtils]: Spent 509.00 ms on a formula simplification that was a NOOP. DAG size: 248 [2020-10-29 13:20:46,615 WARN L193 SmtUtils]: Spent 530.00 ms on a formula simplification that was a NOOP. DAG size: 249 [2020-10-29 13:20:46,875 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:20:46,875 INFO L93 Difference]: Finished difference Result 3695 states and 5355 transitions. [2020-10-29 13:20:46,879 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-29 13:20:46,879 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 99 [2020-10-29 13:20:46,880 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:20:46,894 INFO L225 Difference]: With dead ends: 3695 [2020-10-29 13:20:46,894 INFO L226 Difference]: Without dead ends: 3284 [2020-10-29 13:20:46,897 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2020-10-29 13:20:46,900 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3284 states. [2020-10-29 13:20:47,478 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3284 to 1895. [2020-10-29 13:20:47,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1895 states. [2020-10-29 13:20:47,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1895 states to 1895 states and 2695 transitions. [2020-10-29 13:20:47,483 INFO L78 Accepts]: Start accepts. Automaton has 1895 states and 2695 transitions. Word has length 99 [2020-10-29 13:20:47,484 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:20:47,484 INFO L481 AbstractCegarLoop]: Abstraction has 1895 states and 2695 transitions. [2020-10-29 13:20:47,484 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-29 13:20:47,484 INFO L276 IsEmpty]: Start isEmpty. Operand 1895 states and 2695 transitions. [2020-10-29 13:20:47,489 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2020-10-29 13:20:47,489 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:20:47,489 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 13:20:47,489 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-29 13:20:47,490 INFO L429 AbstractCegarLoop]: === Iteration 18 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:20:47,490 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:20:47,490 INFO L82 PathProgramCache]: Analyzing trace with hash 858080008, now seen corresponding path program 1 times [2020-10-29 13:20:47,490 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:20:47,491 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1100452038] [2020-10-29 13:20:47,491 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:20:47,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:20:47,545 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:20:47,579 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:20:47,617 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:20:47,661 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:20:47,742 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:20:47,772 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:20:47,843 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:20:48,619 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:20:48,675 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:20:49,825 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:20:50,145 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:20:50,260 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:20:51,229 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:20:51,942 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:20:52,300 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:20:52,543 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:20:52,543 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 107 [2020-10-29 13:20:52,543 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 15 [2020-10-29 13:20:52,544 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5017 [2020-10-29 13:20:52,544 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:20:52,544 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:20:52,544 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-29 13:20:52,544 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-29 13:20:52,544 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 83 [2020-10-29 13:20:52,544 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:20:53,241 WARN L193 SmtUtils]: Spent 498.00 ms on a formula simplification that was a NOOP. DAG size: 247 [2020-10-29 13:20:53,243 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:20:53,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:20:53,258 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:20:53,276 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:20:53,277 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:20:53,277 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:20:53,277 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 22 [2020-10-29 13:20:53,277 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:20:53,277 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:20:53,277 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 13:20:53,277 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:20:53,277 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-29 13:20:53,277 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:20:53,315 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 13:20:53,315 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1100452038] [2020-10-29 13:20:53,315 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:20:53,315 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-29 13:20:53,316 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [643705070] [2020-10-29 13:20:53,316 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-29 13:20:53,316 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:20:53,317 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-29 13:20:53,317 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-10-29 13:20:53,317 INFO L87 Difference]: Start difference. First operand 1895 states and 2695 transitions. Second operand 8 states. [2020-10-29 13:20:53,906 WARN L193 SmtUtils]: Spent 531.00 ms on a formula simplification that was a NOOP. DAG size: 254 [2020-10-29 13:20:55,871 WARN L193 SmtUtils]: Spent 549.00 ms on a formula simplification that was a NOOP. DAG size: 258 [2020-10-29 13:20:56,457 WARN L193 SmtUtils]: Spent 536.00 ms on a formula simplification that was a NOOP. DAG size: 256 [2020-10-29 13:20:57,987 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:20:57,987 INFO L93 Difference]: Finished difference Result 9647 states and 14061 transitions. [2020-10-29 13:20:57,988 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-29 13:20:57,988 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 99 [2020-10-29 13:20:57,988 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:20:58,019 INFO L225 Difference]: With dead ends: 9647 [2020-10-29 13:20:58,019 INFO L226 Difference]: Without dead ends: 8036 [2020-10-29 13:20:58,025 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=91, Invalid=215, Unknown=0, NotChecked=0, Total=306 [2020-10-29 13:20:58,033 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8036 states. [2020-10-29 13:20:58,919 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8036 to 3695. [2020-10-29 13:20:58,919 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3695 states. [2020-10-29 13:20:58,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3695 states to 3695 states and 5335 transitions. [2020-10-29 13:20:58,926 INFO L78 Accepts]: Start accepts. Automaton has 3695 states and 5335 transitions. Word has length 99 [2020-10-29 13:20:58,926 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:20:58,926 INFO L481 AbstractCegarLoop]: Abstraction has 3695 states and 5335 transitions. [2020-10-29 13:20:58,926 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-29 13:20:58,926 INFO L276 IsEmpty]: Start isEmpty. Operand 3695 states and 5335 transitions. [2020-10-29 13:20:58,931 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2020-10-29 13:20:58,932 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:20:58,932 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 13:20:58,932 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-29 13:20:58,932 INFO L429 AbstractCegarLoop]: === Iteration 19 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:20:58,932 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:20:58,933 INFO L82 PathProgramCache]: Analyzing trace with hash 908663717, now seen corresponding path program 1 times [2020-10-29 13:20:58,933 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:20:58,933 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2125199834] [2020-10-29 13:20:58,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:20:58,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:20:58,988 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:20:59,031 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:20:59,061 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:20:59,087 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:20:59,333 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:20:59,399 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:21:01,221 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:21:01,270 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:21:03,977 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:21:03,977 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 107 [2020-10-29 13:21:03,977 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-29 13:21:03,977 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5011 [2020-10-29 13:21:03,977 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:21:03,977 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:21:03,978 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-29 13:21:03,978 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-29 13:21:03,978 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 86 [2020-10-29 13:21:03,978 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:21:04,625 WARN L193 SmtUtils]: Spent 502.00 ms on a formula simplification that was a NOOP. DAG size: 247 [2020-10-29 13:21:04,629 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:21:04,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:21:04,642 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:21:04,654 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:21:04,654 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:21:04,655 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:21:04,655 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 15 [2020-10-29 13:21:04,655 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:21:04,655 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:21:04,655 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 13:21:04,655 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:21:04,656 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 13:21:04,656 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:21:04,706 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 13:21:04,706 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2125199834] [2020-10-29 13:21:04,706 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:21:04,706 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-29 13:21:04,707 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1316517569] [2020-10-29 13:21:04,707 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-29 13:21:04,707 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:21:04,708 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-29 13:21:04,708 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-10-29 13:21:04,708 INFO L87 Difference]: Start difference. First operand 3695 states and 5335 transitions. Second operand 7 states. [2020-10-29 13:21:05,407 WARN L193 SmtUtils]: Spent 612.00 ms on a formula simplification that was a NOOP. DAG size: 259 [2020-10-29 13:21:07,459 WARN L193 SmtUtils]: Spent 579.00 ms on a formula simplification that was a NOOP. DAG size: 256 [2020-10-29 13:21:08,049 WARN L193 SmtUtils]: Spent 560.00 ms on a formula simplification that was a NOOP. DAG size: 253 [2020-10-29 13:21:08,832 WARN L193 SmtUtils]: Spent 601.00 ms on a formula simplification that was a NOOP. DAG size: 256 [2020-10-29 13:21:09,394 WARN L193 SmtUtils]: Spent 480.00 ms on a formula simplification that was a NOOP. DAG size: 251 [2020-10-29 13:21:11,292 WARN L193 SmtUtils]: Spent 475.00 ms on a formula simplification that was a NOOP. DAG size: 250 [2020-10-29 13:21:12,013 WARN L193 SmtUtils]: Spent 556.00 ms on a formula simplification that was a NOOP. DAG size: 253 [2020-10-29 13:21:12,854 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:21:12,854 INFO L93 Difference]: Finished difference Result 17351 states and 25447 transitions. [2020-10-29 13:21:12,854 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-29 13:21:12,854 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 99 [2020-10-29 13:21:12,855 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:21:12,886 INFO L225 Difference]: With dead ends: 17351 [2020-10-29 13:21:12,886 INFO L226 Difference]: Without dead ends: 13940 [2020-10-29 13:21:12,897 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=106, Invalid=236, Unknown=0, NotChecked=0, Total=342 [2020-10-29 13:21:12,913 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13940 states. [2020-10-29 13:21:13,862 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13940 to 3695. [2020-10-29 13:21:13,862 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3695 states. [2020-10-29 13:21:13,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3695 states to 3695 states and 5303 transitions. [2020-10-29 13:21:13,868 INFO L78 Accepts]: Start accepts. Automaton has 3695 states and 5303 transitions. Word has length 99 [2020-10-29 13:21:13,868 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:21:13,868 INFO L481 AbstractCegarLoop]: Abstraction has 3695 states and 5303 transitions. [2020-10-29 13:21:13,868 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-29 13:21:13,869 INFO L276 IsEmpty]: Start isEmpty. Operand 3695 states and 5303 transitions. [2020-10-29 13:21:13,873 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2020-10-29 13:21:13,874 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:21:13,874 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 13:21:13,874 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-29 13:21:13,874 INFO L429 AbstractCegarLoop]: === Iteration 20 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:21:13,875 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:21:13,875 INFO L82 PathProgramCache]: Analyzing trace with hash -548449754, now seen corresponding path program 1 times [2020-10-29 13:21:13,875 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:21:13,875 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [672290635] [2020-10-29 13:21:13,875 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:21:13,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:21:13,925 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:21:13,959 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:21:14,000 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:21:14,070 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:21:14,463 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:21:14,549 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:21:14,600 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:21:18,959 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:21:18,959 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 107 [2020-10-29 13:21:18,960 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-29 13:21:18,960 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5052 [2020-10-29 13:21:18,960 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:21:18,960 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:21:18,960 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-29 13:21:18,960 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-29 13:21:18,960 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 87 [2020-10-29 13:21:18,960 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:21:19,608 WARN L193 SmtUtils]: Spent 496.00 ms on a formula simplification that was a NOOP. DAG size: 247 [2020-10-29 13:21:19,610 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:21:19,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:21:19,621 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:21:19,632 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:21:19,632 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:21:19,632 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:21:19,632 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 15 [2020-10-29 13:21:19,633 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:21:19,633 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:21:19,633 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 13:21:19,633 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:21:19,633 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 13:21:19,633 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:21:19,672 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 13:21:19,672 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [672290635] [2020-10-29 13:21:19,672 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:21:19,673 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-29 13:21:19,673 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2012528884] [2020-10-29 13:21:19,673 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-29 13:21:19,673 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:21:19,674 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-29 13:21:19,674 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-29 13:21:19,674 INFO L87 Difference]: Start difference. First operand 3695 states and 5303 transitions. Second operand 6 states. [2020-10-29 13:21:20,235 WARN L193 SmtUtils]: Spent 516.00 ms on a formula simplification that was a NOOP. DAG size: 250 [2020-10-29 13:21:22,132 WARN L193 SmtUtils]: Spent 474.00 ms on a formula simplification that was a NOOP. DAG size: 249 [2020-10-29 13:21:22,733 WARN L193 SmtUtils]: Spent 561.00 ms on a formula simplification that was a NOOP. DAG size: 256 [2020-10-29 13:21:24,272 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:21:24,273 INFO L93 Difference]: Finished difference Result 11870 states and 17203 transitions. [2020-10-29 13:21:24,273 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-29 13:21:24,273 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 99 [2020-10-29 13:21:24,274 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:21:24,295 INFO L225 Difference]: With dead ends: 11870 [2020-10-29 13:21:24,295 INFO L226 Difference]: Without dead ends: 8459 [2020-10-29 13:21:24,305 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=36, Invalid=54, Unknown=0, NotChecked=0, Total=90 [2020-10-29 13:21:24,314 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8459 states. [2020-10-29 13:21:26,326 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8459 to 8453. [2020-10-29 13:21:26,326 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8453 states. [2020-10-29 13:21:26,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8453 states to 8453 states and 12061 transitions. [2020-10-29 13:21:26,339 INFO L78 Accepts]: Start accepts. Automaton has 8453 states and 12061 transitions. Word has length 99 [2020-10-29 13:21:26,339 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:21:26,339 INFO L481 AbstractCegarLoop]: Abstraction has 8453 states and 12061 transitions. [2020-10-29 13:21:26,339 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-29 13:21:26,339 INFO L276 IsEmpty]: Start isEmpty. Operand 8453 states and 12061 transitions. [2020-10-29 13:21:26,344 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2020-10-29 13:21:26,344 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:21:26,344 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 13:21:26,344 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-10-29 13:21:26,345 INFO L429 AbstractCegarLoop]: === Iteration 21 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:21:26,345 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:21:26,345 INFO L82 PathProgramCache]: Analyzing trace with hash 1385525884, now seen corresponding path program 1 times [2020-10-29 13:21:26,345 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:21:26,346 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [106653795] [2020-10-29 13:21:26,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:21:26,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:21:26,403 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:21:26,519 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:21:26,557 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:21:26,620 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:21:26,953 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:21:27,002 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:21:27,105 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:21:27,139 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:21:27,181 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:21:27,234 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:21:27,279 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:21:28,175 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:21:31,434 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:21:31,434 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 107 [2020-10-29 13:21:31,434 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 12 [2020-10-29 13:21:31,435 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5054 [2020-10-29 13:21:31,435 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:21:31,435 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:21:31,435 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-29 13:21:31,435 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 27 [2020-10-29 13:21:31,436 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 69 [2020-10-29 13:21:31,436 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:21:32,094 WARN L193 SmtUtils]: Spent 562.00 ms on a formula simplification that was a NOOP. DAG size: 247 [2020-10-29 13:21:32,096 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:21:32,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:21:32,105 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:21:32,115 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:21:32,115 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:21:32,115 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:21:32,115 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12 [2020-10-29 13:21:32,115 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:21:32,115 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:21:32,116 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 13:21:32,116 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:21:32,116 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 13:21:32,116 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:21:32,144 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 13:21:32,144 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [106653795] [2020-10-29 13:21:32,144 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:21:32,145 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-10-29 13:21:32,145 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [489336032] [2020-10-29 13:21:32,145 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-29 13:21:32,145 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:21:32,146 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-29 13:21:32,146 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-10-29 13:21:32,146 INFO L87 Difference]: Start difference. First operand 8453 states and 12061 transitions. Second operand 8 states. [2020-10-29 13:21:32,814 WARN L193 SmtUtils]: Spent 588.00 ms on a formula simplification that was a NOOP. DAG size: 250 [2020-10-29 13:21:35,716 WARN L193 SmtUtils]: Spent 481.00 ms on a formula simplification that was a NOOP. DAG size: 253 [2020-10-29 13:21:36,345 WARN L193 SmtUtils]: Spent 518.00 ms on a formula simplification that was a NOOP. DAG size: 254 [2020-10-29 13:21:36,938 WARN L193 SmtUtils]: Spent 504.00 ms on a formula simplification that was a NOOP. DAG size: 251 [2020-10-29 13:21:37,551 WARN L193 SmtUtils]: Spent 490.00 ms on a formula simplification that was a NOOP. DAG size: 252 [2020-10-29 13:21:53,106 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:21:53,107 INFO L93 Difference]: Finished difference Result 72215 states and 103747 transitions. [2020-10-29 13:21:53,107 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-29 13:21:53,107 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 99 [2020-10-29 13:21:53,107 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:21:53,242 INFO L225 Difference]: With dead ends: 72215 [2020-10-29 13:21:53,243 INFO L226 Difference]: Without dead ends: 64284 [2020-10-29 13:21:53,275 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 173 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=191, Invalid=565, Unknown=0, NotChecked=0, Total=756 [2020-10-29 13:21:53,353 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64284 states.