/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --rcfgbuilder.size.of.a.code.block SequenceOfStatements --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=DEEPEST --traceabstraction.additional.smt.options log-additional-information=true --traceabstraction.additional.smt.options unknown-allowed=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf language data_model -i ../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_lcr-var-start-time.4.1.ufo.BOUNDED-8.pals.c.v+cfa-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-28 00:09:29,323 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-28 00:09:29,326 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-28 00:09:29,366 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-28 00:09:29,367 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-28 00:09:29,368 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-28 00:09:29,370 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-28 00:09:29,372 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-28 00:09:29,375 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-28 00:09:29,376 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-28 00:09:29,377 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-28 00:09:29,379 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-28 00:09:29,379 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-28 00:09:29,381 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-28 00:09:29,382 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-28 00:09:29,383 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-28 00:09:29,384 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-28 00:09:29,397 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-28 00:09:29,402 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-28 00:09:29,404 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-28 00:09:29,406 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-28 00:09:29,407 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-28 00:09:29,409 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-28 00:09:29,410 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-28 00:09:29,413 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-28 00:09:29,413 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-28 00:09:29,414 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-28 00:09:29,415 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-28 00:09:29,415 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-28 00:09:29,416 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-28 00:09:29,416 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-28 00:09:29,417 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-28 00:09:29,418 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-28 00:09:29,419 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-28 00:09:29,420 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-28 00:09:29,421 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-28 00:09:29,422 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-28 00:09:29,422 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-28 00:09:29,422 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-28 00:09:29,423 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-28 00:09:29,424 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-28 00:09:29,425 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 [2020-10-28 00:09:29,454 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-28 00:09:29,454 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-28 00:09:29,456 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-28 00:09:29,456 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-28 00:09:29,456 INFO L138 SettingsManager]: * Use SBE=true [2020-10-28 00:09:29,456 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-28 00:09:29,457 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-28 00:09:29,457 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-28 00:09:29,457 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-28 00:09:29,457 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-28 00:09:29,458 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-28 00:09:29,458 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-28 00:09:29,458 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-28 00:09:29,458 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-28 00:09:29,459 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-28 00:09:29,459 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-28 00:09:29,459 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-28 00:09:29,459 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-28 00:09:29,460 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-28 00:09:29,460 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-28 00:09:29,460 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-28 00:09:29,460 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-28 00:09:29,461 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-28 00:09:29,461 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-28 00:09:29,461 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-28 00:09:29,461 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-28 00:09:29,462 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-28 00:09:29,462 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-28 00:09:29,462 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-28 00:09:29,462 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=DEEPEST;log-additional-information=true;unknown-allowed=true; [2020-10-28 00:09:29,825 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-28 00:09:29,859 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-28 00:09:29,864 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-28 00:09:29,865 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-28 00:09:29,866 INFO L275 PluginConnector]: CDTParser initialized [2020-10-28 00:09:29,868 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_lcr-var-start-time.4.1.ufo.BOUNDED-8.pals.c.v+cfa-reducer.c [2020-10-28 00:09:29,960 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/a79844401/2b263c7dca984518b293e10e7780f152/FLAG7a0500b93 [2020-10-28 00:09:30,692 INFO L306 CDTParser]: Found 1 translation units. [2020-10-28 00:09:30,693 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/seq-mthreaded-reduced/pals_lcr-var-start-time.4.1.ufo.BOUNDED-8.pals.c.v+cfa-reducer.c [2020-10-28 00:09:30,710 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/a79844401/2b263c7dca984518b293e10e7780f152/FLAG7a0500b93 [2020-10-28 00:09:30,962 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/a79844401/2b263c7dca984518b293e10e7780f152 [2020-10-28 00:09:30,965 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-28 00:09:30,975 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-28 00:09:30,981 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-28 00:09:30,982 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-28 00:09:30,986 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-28 00:09:30,986 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 12:09:30" (1/1) ... [2020-10-28 00:09:30,992 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@78262a7f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 12:09:30, skipping insertion in model container [2020-10-28 00:09:30,992 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 12:09:30" (1/1) ... [2020-10-28 00:09:31,000 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-28 00:09:31,046 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-28 00:09:31,329 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-28 00:09:31,345 INFO L203 MainTranslator]: Completed pre-run [2020-10-28 00:09:31,423 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-28 00:09:31,469 INFO L208 MainTranslator]: Completed translation [2020-10-28 00:09:31,471 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 12:09:31 WrapperNode [2020-10-28 00:09:31,471 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-28 00:09:31,473 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-28 00:09:31,473 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-28 00:09:31,473 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-28 00:09:31,494 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 12:09:31" (1/1) ... [2020-10-28 00:09:31,497 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 12:09:31" (1/1) ... [2020-10-28 00:09:31,535 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 12:09:31" (1/1) ... [2020-10-28 00:09:31,535 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 12:09:31" (1/1) ... [2020-10-28 00:09:31,571 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 12:09:31" (1/1) ... [2020-10-28 00:09:31,591 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 12:09:31" (1/1) ... [2020-10-28 00:09:31,601 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 12:09:31" (1/1) ... [2020-10-28 00:09:31,612 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-28 00:09:31,616 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-28 00:09:31,617 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-28 00:09:31,617 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-28 00:09:31,621 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 12:09:31" (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 [2020-10-28 00:09:31,703 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-28 00:09:31,703 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-28 00:09:31,703 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-28 00:09:31,704 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-10-28 00:09:31,704 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-28 00:09:31,704 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-28 00:09:31,704 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-28 00:09:31,704 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-28 00:09:31,705 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-28 00:09:31,705 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-10-28 00:09:31,705 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-10-28 00:09:31,705 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2020-10-28 00:09:31,705 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-10-28 00:09:31,706 INFO L130 BoogieDeclarations]: Found specification of procedure read [2020-10-28 00:09:31,706 INFO L130 BoogieDeclarations]: Found specification of procedure write [2020-10-28 00:09:31,706 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2020-10-28 00:09:31,706 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2020-10-28 00:09:31,706 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2020-10-28 00:09:31,706 INFO L130 BoogieDeclarations]: Found specification of procedure node4 [2020-10-28 00:09:31,707 INFO L130 BoogieDeclarations]: Found specification of procedure init [2020-10-28 00:09:31,707 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-10-28 00:09:31,707 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-28 00:09:31,707 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-28 00:09:31,707 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-28 00:09:31,707 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-28 00:09:31,708 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-28 00:09:31,708 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-28 00:09:31,708 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-28 00:09:32,606 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-28 00:09:32,606 INFO L298 CfgBuilder]: Removed 0 assume(true) statements. [2020-10-28 00:09:32,608 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 12:09:32 BoogieIcfgContainer [2020-10-28 00:09:32,608 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-28 00:09:32,610 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-28 00:09:32,610 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-28 00:09:32,614 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-28 00:09:32,614 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.10 12:09:30" (1/3) ... [2020-10-28 00:09:32,615 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@29889fda and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 12:09:32, skipping insertion in model container [2020-10-28 00:09:32,615 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 12:09:31" (2/3) ... [2020-10-28 00:09:32,616 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@29889fda and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 12:09:32, skipping insertion in model container [2020-10-28 00:09:32,616 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 12:09:32" (3/3) ... [2020-10-28 00:09:32,618 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_lcr-var-start-time.4.1.ufo.BOUNDED-8.pals.c.v+cfa-reducer.c [2020-10-28 00:09:32,629 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-28 00:09:32,635 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-28 00:09:32,649 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-28 00:09:32,677 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-28 00:09:32,677 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-28 00:09:32,677 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-28 00:09:32,678 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-28 00:09:32,678 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-28 00:09:32,678 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-28 00:09:32,678 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-28 00:09:32,678 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-28 00:09:32,699 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states. [2020-10-28 00:09:32,708 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-10-28 00:09:32,708 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 00:09:32,709 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] [2020-10-28 00:09:32,710 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 00:09:32,716 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 00:09:32,716 INFO L82 PathProgramCache]: Analyzing trace with hash 2088021378, now seen corresponding path program 1 times [2020-10-28 00:09:32,726 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 00:09:32,726 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1418607009] [2020-10-28 00:09:32,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 00:09:33,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:09:33,112 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:09:33,308 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:09:33,417 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:09:33,878 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:09:34,039 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:09:38,026 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:09:38,027 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 61 [2020-10-28 00:09:38,027 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-28 00:09:38,027 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-28 00:09:38,030 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:09:38,030 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 00:09:38,031 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 29 [2020-10-28 00:09:38,031 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-28 00:09:38,031 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-28 00:09:38,593 WARN L193 SmtUtils]: Spent 455.00 ms on a formula simplification that was a NOOP. DAG size: 151 [2020-10-28 00:09:38,598 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 00:09:38,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:09:38,617 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:09:38,635 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:09:38,636 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 00:09:38,636 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 00:09:38,636 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 22 [2020-10-28 00:09:38,637 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:09:38,638 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 00:09:38,638 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 00:09:38,638 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 00:09:38,638 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:09:38,665 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 00:09:38,665 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1418607009] [2020-10-28 00:09:38,668 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 00:09:38,668 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 00:09:38,669 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1403648398] [2020-10-28 00:09:38,675 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 00:09:38,676 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 00:09:38,699 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 00:09:38,700 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 00:09:38,702 INFO L87 Difference]: Start difference. First operand 119 states. Second operand 4 states. [2020-10-28 00:09:39,281 WARN L193 SmtUtils]: Spent 479.00 ms on a formula simplification that was a NOOP. DAG size: 155 [2020-10-28 00:09:40,139 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 00:09:40,139 INFO L93 Difference]: Finished difference Result 273 states and 434 transitions. [2020-10-28 00:09:40,140 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 00:09:40,141 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 53 [2020-10-28 00:09:40,142 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 00:09:40,155 INFO L225 Difference]: With dead ends: 273 [2020-10-28 00:09:40,155 INFO L226 Difference]: Without dead ends: 177 [2020-10-28 00:09:40,159 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-28 00:09:40,179 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2020-10-28 00:09:40,217 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 174. [2020-10-28 00:09:40,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 174 states. [2020-10-28 00:09:40,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 174 states to 174 states and 258 transitions. [2020-10-28 00:09:40,223 INFO L78 Accepts]: Start accepts. Automaton has 174 states and 258 transitions. Word has length 53 [2020-10-28 00:09:40,224 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 00:09:40,224 INFO L481 AbstractCegarLoop]: Abstraction has 174 states and 258 transitions. [2020-10-28 00:09:40,224 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 00:09:40,224 INFO L276 IsEmpty]: Start isEmpty. Operand 174 states and 258 transitions. [2020-10-28 00:09:40,226 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-10-28 00:09:40,226 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 00:09:40,227 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] [2020-10-28 00:09:40,227 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-28 00:09:40,227 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 00:09:40,228 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 00:09:40,228 INFO L82 PathProgramCache]: Analyzing trace with hash -963535353, now seen corresponding path program 1 times [2020-10-28 00:09:40,228 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 00:09:40,229 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [916919449] [2020-10-28 00:09:40,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 00:09:40,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:09:40,283 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:09:40,321 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:09:40,355 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:09:40,551 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:09:42,463 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:09:42,463 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 62 [2020-10-28 00:09:42,463 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-28 00:09:42,464 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2198 [2020-10-28 00:09:42,464 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:09:42,464 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 00:09:42,464 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 25 [2020-10-28 00:09:42,465 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-28 00:09:42,465 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:09:42,905 WARN L193 SmtUtils]: Spent 376.00 ms on a formula simplification that was a NOOP. DAG size: 151 [2020-10-28 00:09:42,906 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 00:09:42,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:09:42,915 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:09:42,928 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:09:42,928 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 00:09:42,928 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 00:09:42,929 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 15 [2020-10-28 00:09:42,929 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:09:42,929 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 00:09:42,929 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 00:09:42,929 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 00:09:42,929 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:09:42,947 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 00:09:42,947 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [916919449] [2020-10-28 00:09:42,947 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 00:09:42,948 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 00:09:42,948 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1005831936] [2020-10-28 00:09:42,950 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 00:09:42,950 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 00:09:42,950 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 00:09:42,951 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 00:09:42,951 INFO L87 Difference]: Start difference. First operand 174 states and 258 transitions. Second operand 4 states. [2020-10-28 00:09:43,266 WARN L193 SmtUtils]: Spent 235.00 ms on a formula simplification that was a NOOP. DAG size: 155 [2020-10-28 00:09:43,870 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 00:09:43,870 INFO L93 Difference]: Finished difference Result 428 states and 660 transitions. [2020-10-28 00:09:43,872 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 00:09:43,872 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 54 [2020-10-28 00:09:43,872 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 00:09:43,877 INFO L225 Difference]: With dead ends: 428 [2020-10-28 00:09:43,877 INFO L226 Difference]: Without dead ends: 285 [2020-10-28 00:09:43,879 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-28 00:09:43,880 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 285 states. [2020-10-28 00:09:43,912 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 285 to 282. [2020-10-28 00:09:43,912 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 282 states. [2020-10-28 00:09:43,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 282 states to 282 states and 429 transitions. [2020-10-28 00:09:43,915 INFO L78 Accepts]: Start accepts. Automaton has 282 states and 429 transitions. Word has length 54 [2020-10-28 00:09:43,915 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 00:09:43,915 INFO L481 AbstractCegarLoop]: Abstraction has 282 states and 429 transitions. [2020-10-28 00:09:43,915 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 00:09:43,916 INFO L276 IsEmpty]: Start isEmpty. Operand 282 states and 429 transitions. [2020-10-28 00:09:43,917 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-10-28 00:09:43,918 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 00:09:43,918 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] [2020-10-28 00:09:43,918 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-28 00:09:43,918 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 00:09:43,919 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 00:09:43,919 INFO L82 PathProgramCache]: Analyzing trace with hash -408787207, now seen corresponding path program 1 times [2020-10-28 00:09:43,919 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 00:09:43,919 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [419330549] [2020-10-28 00:09:43,919 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 00:09:43,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:09:43,964 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:09:43,992 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:09:44,055 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:09:45,024 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:09:45,025 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 63 [2020-10-28 00:09:45,025 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 00:09:45,025 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1075 [2020-10-28 00:09:45,025 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:09:45,026 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 00:09:45,026 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 21 [2020-10-28 00:09:45,026 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-28 00:09:45,026 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:09:45,328 WARN L193 SmtUtils]: Spent 244.00 ms on a formula simplification that was a NOOP. DAG size: 151 [2020-10-28 00:09:45,331 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 00:09:45,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:09:45,341 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:09:45,350 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:09:45,350 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 00:09:45,350 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 00:09:45,350 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-10-28 00:09:45,350 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:09:45,351 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 00:09:45,351 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 00:09:45,351 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 00:09:45,351 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:09:45,366 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 00:09:45,367 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [419330549] [2020-10-28 00:09:45,367 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 00:09:45,367 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 00:09:45,368 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1760999732] [2020-10-28 00:09:45,369 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 00:09:45,369 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 00:09:45,370 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 00:09:45,371 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 00:09:45,371 INFO L87 Difference]: Start difference. First operand 282 states and 429 transitions. Second operand 4 states. [2020-10-28 00:09:45,619 WARN L193 SmtUtils]: Spent 213.00 ms on a formula simplification that was a NOOP. DAG size: 155 [2020-10-28 00:09:46,333 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 00:09:46,334 INFO L93 Difference]: Finished difference Result 720 states and 1121 transitions. [2020-10-28 00:09:46,334 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 00:09:46,334 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 55 [2020-10-28 00:09:46,335 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 00:09:46,339 INFO L225 Difference]: With dead ends: 720 [2020-10-28 00:09:46,339 INFO L226 Difference]: Without dead ends: 469 [2020-10-28 00:09:46,346 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-28 00:09:46,349 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 469 states. [2020-10-28 00:09:46,396 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 469 to 466. [2020-10-28 00:09:46,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 466 states. [2020-10-28 00:09:46,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 466 states to 466 states and 717 transitions. [2020-10-28 00:09:46,399 INFO L78 Accepts]: Start accepts. Automaton has 466 states and 717 transitions. Word has length 55 [2020-10-28 00:09:46,399 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 00:09:46,400 INFO L481 AbstractCegarLoop]: Abstraction has 466 states and 717 transitions. [2020-10-28 00:09:46,400 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 00:09:46,400 INFO L276 IsEmpty]: Start isEmpty. Operand 466 states and 717 transitions. [2020-10-28 00:09:46,402 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-10-28 00:09:46,402 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 00:09:46,402 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] [2020-10-28 00:09:46,402 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-28 00:09:46,402 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 00:09:46,403 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 00:09:46,403 INFO L82 PathProgramCache]: Analyzing trace with hash 427450534, now seen corresponding path program 1 times [2020-10-28 00:09:46,403 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 00:09:46,404 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [657148031] [2020-10-28 00:09:46,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 00:09:46,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:09:46,443 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:09:46,467 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:09:46,928 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:09:46,928 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 64 [2020-10-28 00:09:46,928 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 00:09:46,929 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 499 [2020-10-28 00:09:46,929 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:09:46,929 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 00:09:46,929 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 17 [2020-10-28 00:09:46,930 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-28 00:09:46,930 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 00:09:47,176 WARN L193 SmtUtils]: Spent 203.00 ms on a formula simplification that was a NOOP. DAG size: 151 [2020-10-28 00:09:47,177 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 00:09:47,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:09:47,190 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:09:47,202 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:09:47,202 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 00:09:47,202 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 00:09:47,203 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 14 [2020-10-28 00:09:47,203 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:09:47,203 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 00:09:47,203 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 00:09:47,203 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 00:09:47,204 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:09:47,220 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 00:09:47,220 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [657148031] [2020-10-28 00:09:47,220 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 00:09:47,220 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 00:09:47,221 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [12213251] [2020-10-28 00:09:47,222 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 00:09:47,222 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 00:09:47,222 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 00:09:47,223 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 00:09:47,223 INFO L87 Difference]: Start difference. First operand 466 states and 717 transitions. Second operand 4 states. [2020-10-28 00:09:47,466 WARN L193 SmtUtils]: Spent 210.00 ms on a formula simplification that was a NOOP. DAG size: 155 [2020-10-28 00:09:48,100 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 00:09:48,100 INFO L93 Difference]: Finished difference Result 1208 states and 1881 transitions. [2020-10-28 00:09:48,100 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 00:09:48,101 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 56 [2020-10-28 00:09:48,102 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 00:09:48,108 INFO L225 Difference]: With dead ends: 1208 [2020-10-28 00:09:48,108 INFO L226 Difference]: Without dead ends: 773 [2020-10-28 00:09:48,110 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-28 00:09:48,111 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 773 states. [2020-10-28 00:09:48,168 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 773 to 770. [2020-10-28 00:09:48,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 770 states. [2020-10-28 00:09:48,173 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 770 states to 770 states and 1185 transitions. [2020-10-28 00:09:48,173 INFO L78 Accepts]: Start accepts. Automaton has 770 states and 1185 transitions. Word has length 56 [2020-10-28 00:09:48,174 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 00:09:48,174 INFO L481 AbstractCegarLoop]: Abstraction has 770 states and 1185 transitions. [2020-10-28 00:09:48,174 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 00:09:48,174 INFO L276 IsEmpty]: Start isEmpty. Operand 770 states and 1185 transitions. [2020-10-28 00:09:48,176 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-10-28 00:09:48,176 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 00:09:48,176 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] [2020-10-28 00:09:48,177 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-28 00:09:48,177 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 00:09:48,177 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 00:09:48,177 INFO L82 PathProgramCache]: Analyzing trace with hash -1420275068, now seen corresponding path program 1 times [2020-10-28 00:09:48,177 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 00:09:48,178 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [195326075] [2020-10-28 00:09:48,178 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 00:09:48,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:09:48,217 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:09:48,242 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:09:49,167 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:09:49,168 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 65 [2020-10-28 00:09:49,172 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 00:09:49,173 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 964 [2020-10-28 00:09:49,173 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:09:49,173 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-28 00:09:49,173 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-28 00:09:49,173 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 44 [2020-10-28 00:09:49,174 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:09:49,453 WARN L193 SmtUtils]: Spent 195.00 ms on a formula simplification that was a NOOP. DAG size: 151 [2020-10-28 00:09:49,454 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 00:09:49,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:09:49,462 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:09:49,472 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:09:49,472 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 00:09:49,472 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 00:09:49,472 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12 [2020-10-28 00:09:49,472 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:09:49,473 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 00:09:49,473 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 00:09:49,473 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 00:09:49,473 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:09:49,493 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 00:09:49,493 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [195326075] [2020-10-28 00:09:49,494 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 00:09:49,494 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-28 00:09:49,494 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [998761310] [2020-10-28 00:09:49,496 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-28 00:09:49,496 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 00:09:49,506 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-28 00:09:49,507 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-10-28 00:09:49,507 INFO L87 Difference]: Start difference. First operand 770 states and 1185 transitions. Second operand 7 states. [2020-10-28 00:09:49,813 WARN L193 SmtUtils]: Spent 252.00 ms on a formula simplification that was a NOOP. DAG size: 159 [2020-10-28 00:09:50,640 WARN L193 SmtUtils]: Spent 186.00 ms on a formula simplification that was a NOOP. DAG size: 153 [2020-10-28 00:09:50,889 WARN L193 SmtUtils]: Spent 230.00 ms on a formula simplification that was a NOOP. DAG size: 155 [2020-10-28 00:09:51,109 WARN L193 SmtUtils]: Spent 201.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-28 00:09:51,295 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 00:09:51,295 INFO L93 Difference]: Finished difference Result 4465 states and 6955 transitions. [2020-10-28 00:09:51,296 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-28 00:09:51,296 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 57 [2020-10-28 00:09:51,298 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 00:09:51,320 INFO L225 Difference]: With dead ends: 4465 [2020-10-28 00:09:51,320 INFO L226 Difference]: Without dead ends: 3726 [2020-10-28 00:09:51,323 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=63, Invalid=119, Unknown=0, NotChecked=0, Total=182 [2020-10-28 00:09:51,327 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3726 states. [2020-10-28 00:09:51,452 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3726 to 1506. [2020-10-28 00:09:51,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1506 states. [2020-10-28 00:09:51,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1506 states to 1506 states and 2305 transitions. [2020-10-28 00:09:51,462 INFO L78 Accepts]: Start accepts. Automaton has 1506 states and 2305 transitions. Word has length 57 [2020-10-28 00:09:51,462 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 00:09:51,463 INFO L481 AbstractCegarLoop]: Abstraction has 1506 states and 2305 transitions. [2020-10-28 00:09:51,463 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-28 00:09:51,463 INFO L276 IsEmpty]: Start isEmpty. Operand 1506 states and 2305 transitions. [2020-10-28 00:09:51,466 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-10-28 00:09:51,466 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 00:09:51,466 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] [2020-10-28 00:09:51,466 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-28 00:09:51,467 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 00:09:51,467 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 00:09:51,467 INFO L82 PathProgramCache]: Analyzing trace with hash -1653608408, now seen corresponding path program 1 times [2020-10-28 00:09:51,467 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 00:09:51,468 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1352406770] [2020-10-28 00:09:51,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 00:09:51,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:09:51,533 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:09:51,667 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:09:51,967 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:09:51,967 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 66 [2020-10-28 00:09:51,967 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 00:09:51,967 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 470 [2020-10-28 00:09:51,968 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:09:51,968 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-28 00:09:51,968 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 59 [2020-10-28 00:09:51,968 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 3 [2020-10-28 00:09:51,968 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:09:52,234 WARN L193 SmtUtils]: Spent 187.00 ms on a formula simplification that was a NOOP. DAG size: 151 [2020-10-28 00:09:52,237 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 00:09:52,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:09:52,253 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:09:52,276 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:09:52,277 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 00:09:52,277 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 00:09:52,277 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 32 [2020-10-28 00:09:52,277 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:09:52,278 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 00:09:52,278 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 00:09:52,278 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 00:09:52,278 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:09:52,322 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 00:09:52,322 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1352406770] [2020-10-28 00:09:52,323 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 00:09:52,323 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-28 00:09:52,324 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1289097974] [2020-10-28 00:09:52,324 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-28 00:09:52,324 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 00:09:52,325 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-28 00:09:52,325 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-28 00:09:52,325 INFO L87 Difference]: Start difference. First operand 1506 states and 2305 transitions. Second operand 5 states. [2020-10-28 00:09:53,166 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 00:09:53,167 INFO L93 Difference]: Finished difference Result 3045 states and 4643 transitions. [2020-10-28 00:09:53,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-28 00:09:53,168 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 58 [2020-10-28 00:09:53,169 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 00:09:53,186 INFO L225 Difference]: With dead ends: 3045 [2020-10-28 00:09:53,186 INFO L226 Difference]: Without dead ends: 3042 [2020-10-28 00:09:53,188 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-28 00:09:53,192 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3042 states. [2020-10-28 00:09:53,335 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3042 to 1570. [2020-10-28 00:09:53,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1570 states. [2020-10-28 00:09:53,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1570 states to 1570 states and 2369 transitions. [2020-10-28 00:09:53,343 INFO L78 Accepts]: Start accepts. Automaton has 1570 states and 2369 transitions. Word has length 58 [2020-10-28 00:09:53,344 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 00:09:53,344 INFO L481 AbstractCegarLoop]: Abstraction has 1570 states and 2369 transitions. [2020-10-28 00:09:53,344 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-28 00:09:53,344 INFO L276 IsEmpty]: Start isEmpty. Operand 1570 states and 2369 transitions. [2020-10-28 00:09:53,348 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2020-10-28 00:09:53,349 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 00:09:53,349 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 00:09:53,349 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-28 00:09:53,349 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 00:09:53,350 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 00:09:53,350 INFO L82 PathProgramCache]: Analyzing trace with hash 575719989, now seen corresponding path program 1 times [2020-10-28 00:09:53,350 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 00:09:53,351 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [187595941] [2020-10-28 00:09:53,351 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 00:09:53,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:09:53,392 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:09:53,418 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:09:53,856 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:09:53,857 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 67 [2020-10-28 00:09:53,857 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 00:09:53,857 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 478 [2020-10-28 00:09:53,857 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:09:53,857 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-28 00:09:53,857 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-28 00:09:53,858 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 42 [2020-10-28 00:09:53,858 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:09:54,153 WARN L193 SmtUtils]: Spent 201.00 ms on a formula simplification that was a NOOP. DAG size: 151 [2020-10-28 00:09:54,155 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 00:09:54,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:09:54,162 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:09:54,173 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:09:54,173 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 00:09:54,173 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 00:09:54,174 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12 [2020-10-28 00:09:54,174 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:09:54,174 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 00:09:54,174 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 00:09:54,174 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 00:09:54,174 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:09:54,207 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 00:09:54,207 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [187595941] [2020-10-28 00:09:54,207 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 00:09:54,208 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-28 00:09:54,208 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1759345614] [2020-10-28 00:09:54,208 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-28 00:09:54,208 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 00:09:54,209 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-28 00:09:54,209 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-10-28 00:09:54,209 INFO L87 Difference]: Start difference. First operand 1570 states and 2369 transitions. Second operand 7 states. [2020-10-28 00:09:55,012 WARN L193 SmtUtils]: Spent 261.00 ms on a formula simplification that was a NOOP. DAG size: 164 [2020-10-28 00:09:55,302 WARN L193 SmtUtils]: Spent 259.00 ms on a formula simplification that was a NOOP. DAG size: 162 [2020-10-28 00:09:55,581 WARN L193 SmtUtils]: Spent 243.00 ms on a formula simplification that was a NOOP. DAG size: 160 [2020-10-28 00:09:55,823 WARN L193 SmtUtils]: Spent 207.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-28 00:09:57,009 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 00:09:57,010 INFO L93 Difference]: Finished difference Result 6830 states and 10249 transitions. [2020-10-28 00:09:57,011 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-28 00:09:57,011 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 59 [2020-10-28 00:09:57,011 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 00:09:57,039 INFO L225 Difference]: With dead ends: 6830 [2020-10-28 00:09:57,039 INFO L226 Difference]: Without dead ends: 5291 [2020-10-28 00:09:57,045 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=45, Invalid=65, Unknown=0, NotChecked=0, Total=110 [2020-10-28 00:09:57,051 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5291 states. [2020-10-28 00:09:57,510 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5291 to 5282. [2020-10-28 00:09:57,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5282 states. [2020-10-28 00:09:57,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5282 states to 5282 states and 7873 transitions. [2020-10-28 00:09:57,536 INFO L78 Accepts]: Start accepts. Automaton has 5282 states and 7873 transitions. Word has length 59 [2020-10-28 00:09:57,537 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 00:09:57,537 INFO L481 AbstractCegarLoop]: Abstraction has 5282 states and 7873 transitions. [2020-10-28 00:09:57,537 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-28 00:09:57,537 INFO L276 IsEmpty]: Start isEmpty. Operand 5282 states and 7873 transitions. [2020-10-28 00:09:57,538 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-10-28 00:09:57,538 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 00:09:57,538 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] [2020-10-28 00:09:57,538 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-28 00:09:57,539 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 00:09:57,539 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 00:09:57,539 INFO L82 PathProgramCache]: Analyzing trace with hash 839477164, now seen corresponding path program 1 times [2020-10-28 00:09:57,539 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 00:09:57,540 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [433576913] [2020-10-28 00:09:57,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 00:09:57,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:09:57,574 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:09:57,599 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:09:58,010 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:09:58,011 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 69 [2020-10-28 00:09:58,011 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 00:09:58,011 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 449 [2020-10-28 00:09:58,011 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:09:58,011 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 00:09:58,012 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-28 00:09:58,012 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 50 [2020-10-28 00:09:58,012 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:09:58,240 WARN L193 SmtUtils]: Spent 187.00 ms on a formula simplification that was a NOOP. DAG size: 151 [2020-10-28 00:09:58,241 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 00:09:58,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:09:58,247 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:09:58,258 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:09:58,258 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 00:09:58,258 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 00:09:58,258 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12 [2020-10-28 00:09:58,259 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:09:58,259 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 00:09:58,259 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 00:09:58,259 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 00:09:58,259 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:09:58,274 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 00:09:58,274 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [433576913] [2020-10-28 00:09:58,275 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 00:09:58,275 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 00:09:58,275 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [681841263] [2020-10-28 00:09:58,275 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 00:09:58,275 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 00:09:58,277 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 00:09:58,278 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 00:09:58,278 INFO L87 Difference]: Start difference. First operand 5282 states and 7873 transitions. Second operand 4 states. [2020-10-28 00:09:58,504 WARN L193 SmtUtils]: Spent 195.00 ms on a formula simplification that was a NOOP. DAG size: 153 [2020-10-28 00:09:59,646 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 00:09:59,647 INFO L93 Difference]: Finished difference Result 12898 states and 19243 transitions. [2020-10-28 00:09:59,647 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 00:09:59,647 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 61 [2020-10-28 00:09:59,648 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 00:09:59,687 INFO L225 Difference]: With dead ends: 12898 [2020-10-28 00:09:59,687 INFO L226 Difference]: Without dead ends: 7647 [2020-10-28 00:09:59,703 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-28 00:09:59,712 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7647 states. [2020-10-28 00:10:00,484 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7647 to 7644. [2020-10-28 00:10:00,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7644 states. [2020-10-28 00:10:00,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7644 states to 7644 states and 11343 transitions. [2020-10-28 00:10:00,513 INFO L78 Accepts]: Start accepts. Automaton has 7644 states and 11343 transitions. Word has length 61 [2020-10-28 00:10:00,514 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 00:10:00,514 INFO L481 AbstractCegarLoop]: Abstraction has 7644 states and 11343 transitions. [2020-10-28 00:10:00,514 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 00:10:00,514 INFO L276 IsEmpty]: Start isEmpty. Operand 7644 states and 11343 transitions. [2020-10-28 00:10:00,520 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2020-10-28 00:10:00,520 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 00:10:00,522 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 00:10:00,522 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-28 00:10:00,522 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 00:10:00,523 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 00:10:00,523 INFO L82 PathProgramCache]: Analyzing trace with hash 3452349, now seen corresponding path program 1 times [2020-10-28 00:10:00,523 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 00:10:00,524 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [285337634] [2020-10-28 00:10:00,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 00:10:00,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:10:00,572 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:10:00,690 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:10:01,004 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:10:01,004 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 90 [2020-10-28 00:10:01,004 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 00:10:01,005 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 450 [2020-10-28 00:10:01,005 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:10:01,005 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-28 00:10:01,005 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-28 00:10:01,005 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 71 [2020-10-28 00:10:01,006 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:10:01,347 WARN L193 SmtUtils]: Spent 252.00 ms on a formula simplification that was a NOOP. DAG size: 151 [2020-10-28 00:10:01,348 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 00:10:01,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:10:01,359 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:10:01,367 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:10:01,367 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 00:10:01,367 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 00:10:01,368 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-28 00:10:01,368 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:10:01,368 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 00:10:01,368 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 00:10:01,368 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 00:10:01,369 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:10:01,471 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-28 00:10:01,471 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [285337634] [2020-10-28 00:10:01,471 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 00:10:01,472 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-28 00:10:01,472 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1895716498] [2020-10-28 00:10:01,472 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-28 00:10:01,472 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 00:10:01,473 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-28 00:10:01,473 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-28 00:10:01,473 INFO L87 Difference]: Start difference. First operand 7644 states and 11343 transitions. Second operand 5 states. [2020-10-28 00:10:01,730 WARN L193 SmtUtils]: Spent 221.00 ms on a formula simplification that was a NOOP. DAG size: 159 [2020-10-28 00:10:02,613 WARN L193 SmtUtils]: Spent 200.00 ms on a formula simplification that was a NOOP. DAG size: 153 [2020-10-28 00:10:03,296 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 00:10:03,296 INFO L93 Difference]: Finished difference Result 17861 states and 26581 transitions. [2020-10-28 00:10:03,297 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-28 00:10:03,297 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 82 [2020-10-28 00:10:03,297 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 00:10:03,346 INFO L225 Difference]: With dead ends: 17861 [2020-10-28 00:10:03,346 INFO L226 Difference]: Without dead ends: 12610 [2020-10-28 00:10:03,360 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2020-10-28 00:10:03,375 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12610 states. [2020-10-28 00:10:04,304 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12610 to 12604. [2020-10-28 00:10:04,304 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12604 states. [2020-10-28 00:10:04,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12604 states to 12604 states and 18607 transitions. [2020-10-28 00:10:04,337 INFO L78 Accepts]: Start accepts. Automaton has 12604 states and 18607 transitions. Word has length 82 [2020-10-28 00:10:04,338 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 00:10:04,338 INFO L481 AbstractCegarLoop]: Abstraction has 12604 states and 18607 transitions. [2020-10-28 00:10:04,338 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-28 00:10:04,338 INFO L276 IsEmpty]: Start isEmpty. Operand 12604 states and 18607 transitions. [2020-10-28 00:10:04,343 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2020-10-28 00:10:04,343 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 00:10:04,344 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 00:10:04,344 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-28 00:10:04,344 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 00:10:04,345 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 00:10:04,345 INFO L82 PathProgramCache]: Analyzing trace with hash 296353029, now seen corresponding path program 1 times [2020-10-28 00:10:04,345 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 00:10:04,345 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1130821551] [2020-10-28 00:10:04,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 00:10:04,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:10:04,386 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:10:04,423 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:10:04,468 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:10:04,829 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:10:05,481 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:10:07,223 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:10:07,223 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 91 [2020-10-28 00:10:07,223 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-28 00:10:07,223 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2852 [2020-10-28 00:10:07,224 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:10:07,224 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 00:10:07,224 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 36 [2020-10-28 00:10:07,224 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 31 [2020-10-28 00:10:07,224 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:10:07,488 WARN L193 SmtUtils]: Spent 207.00 ms on a formula simplification that was a NOOP. DAG size: 151 [2020-10-28 00:10:07,489 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 00:10:07,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:10:07,498 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:10:07,505 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:10:07,505 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 00:10:07,505 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 00:10:07,505 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-28 00:10:07,506 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:10:07,506 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 00:10:07,506 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 00:10:07,506 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 00:10:07,506 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:10:07,525 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 10 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 00:10:07,526 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1130821551] [2020-10-28 00:10:07,526 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 00:10:07,526 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-28 00:10:07,526 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [277996349] [2020-10-28 00:10:07,527 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-28 00:10:07,527 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 00:10:07,527 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-28 00:10:07,528 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-28 00:10:07,528 INFO L87 Difference]: Start difference. First operand 12604 states and 18607 transitions. Second operand 6 states. [2020-10-28 00:10:08,666 WARN L193 SmtUtils]: Spent 277.00 ms on a formula simplification that was a NOOP. DAG size: 153 [2020-10-28 00:10:08,985 WARN L193 SmtUtils]: Spent 212.00 ms on a formula simplification that was a NOOP. DAG size: 152 [2020-10-28 00:10:09,867 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 00:10:09,867 INFO L93 Difference]: Finished difference Result 32492 states and 47425 transitions. [2020-10-28 00:10:09,868 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-28 00:10:09,868 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 83 [2020-10-28 00:10:09,868 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 00:10:09,919 INFO L225 Difference]: With dead ends: 32492 [2020-10-28 00:10:09,920 INFO L226 Difference]: Without dead ends: 19921 [2020-10-28 00:10:09,946 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2020-10-28 00:10:09,970 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19921 states. [2020-10-28 00:10:11,061 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19921 to 13056. [2020-10-28 00:10:11,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13056 states. [2020-10-28 00:10:11,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13056 states to 13056 states and 18815 transitions. [2020-10-28 00:10:11,093 INFO L78 Accepts]: Start accepts. Automaton has 13056 states and 18815 transitions. Word has length 83 [2020-10-28 00:10:11,093 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 00:10:11,093 INFO L481 AbstractCegarLoop]: Abstraction has 13056 states and 18815 transitions. [2020-10-28 00:10:11,093 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-28 00:10:11,094 INFO L276 IsEmpty]: Start isEmpty. Operand 13056 states and 18815 transitions. [2020-10-28 00:10:11,100 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2020-10-28 00:10:11,100 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 00:10:11,100 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 00:10:11,101 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-28 00:10:11,101 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 00:10:11,101 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 00:10:11,101 INFO L82 PathProgramCache]: Analyzing trace with hash -1653567376, now seen corresponding path program 1 times [2020-10-28 00:10:11,102 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 00:10:11,102 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [789448576] [2020-10-28 00:10:11,102 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 00:10:11,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:10:11,147 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:10:11,192 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:10:11,219 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:10:11,454 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:10:12,202 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:10:12,242 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:10:12,406 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:10:15,038 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:10:16,138 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:10:16,138 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 91 [2020-10-28 00:10:16,139 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-28 00:10:16,139 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5009 [2020-10-28 00:10:16,139 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:10:16,139 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 00:10:16,139 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 46 [2020-10-28 00:10:16,139 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-28 00:10:16,139 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:10:16,394 WARN L193 SmtUtils]: Spent 190.00 ms on a formula simplification that was a NOOP. DAG size: 151 [2020-10-28 00:10:16,395 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 00:10:16,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:10:16,403 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:10:16,411 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:10:16,412 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 00:10:16,412 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 00:10:16,412 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-28 00:10:16,412 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:10:16,412 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 00:10:16,412 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 00:10:16,412 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 00:10:16,413 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:10:16,432 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 00:10:16,433 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [789448576] [2020-10-28 00:10:16,433 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 00:10:16,433 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 00:10:16,434 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1987962843] [2020-10-28 00:10:16,434 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 00:10:16,434 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 00:10:16,435 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 00:10:16,435 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 00:10:16,435 INFO L87 Difference]: Start difference. First operand 13056 states and 18815 transitions. Second operand 4 states. [2020-10-28 00:10:16,676 WARN L193 SmtUtils]: Spent 206.00 ms on a formula simplification that was a NOOP. DAG size: 155 [2020-10-28 00:10:18,854 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 00:10:18,855 INFO L93 Difference]: Finished difference Result 31093 states and 44811 transitions. [2020-10-28 00:10:18,855 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 00:10:18,855 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 83 [2020-10-28 00:10:18,856 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 00:10:18,905 INFO L225 Difference]: With dead ends: 31093 [2020-10-28 00:10:18,905 INFO L226 Difference]: Without dead ends: 20682 [2020-10-28 00:10:18,930 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-28 00:10:18,953 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20682 states. [2020-10-28 00:10:20,726 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20682 to 19667. [2020-10-28 00:10:20,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19667 states. [2020-10-28 00:10:20,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19667 states to 19667 states and 28077 transitions. [2020-10-28 00:10:20,753 INFO L78 Accepts]: Start accepts. Automaton has 19667 states and 28077 transitions. Word has length 83 [2020-10-28 00:10:20,753 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 00:10:20,753 INFO L481 AbstractCegarLoop]: Abstraction has 19667 states and 28077 transitions. [2020-10-28 00:10:20,753 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 00:10:20,753 INFO L276 IsEmpty]: Start isEmpty. Operand 19667 states and 28077 transitions. [2020-10-28 00:10:20,760 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2020-10-28 00:10:20,760 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 00:10:20,760 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 00:10:20,760 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-28 00:10:20,761 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 00:10:20,761 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 00:10:20,761 INFO L82 PathProgramCache]: Analyzing trace with hash -240903439, now seen corresponding path program 1 times [2020-10-28 00:10:20,761 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 00:10:20,761 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [63948260] [2020-10-28 00:10:20,762 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 00:10:20,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:10:20,798 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:10:20,828 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:10:20,919 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:10:21,026 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:10:21,220 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:10:22,617 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:10:25,783 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:10:25,783 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 91 [2020-10-28 00:10:25,783 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-28 00:10:25,783 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4999 [2020-10-28 00:10:25,783 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:10:25,784 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 00:10:25,784 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 51 [2020-10-28 00:10:25,784 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 25 [2020-10-28 00:10:25,784 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:10:26,041 WARN L193 SmtUtils]: Spent 212.00 ms on a formula simplification that was a NOOP. DAG size: 151 [2020-10-28 00:10:26,042 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 00:10:26,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:10:26,052 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:10:26,060 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:10:26,060 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 00:10:26,060 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 00:10:26,061 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-28 00:10:26,061 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:10:26,061 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 00:10:26,061 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 00:10:26,061 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 00:10:26,062 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:10:26,082 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 00:10:26,083 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [63948260] [2020-10-28 00:10:26,083 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 00:10:26,083 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 00:10:26,083 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [922269603] [2020-10-28 00:10:26,084 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 00:10:26,084 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 00:10:26,084 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 00:10:26,085 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 00:10:26,085 INFO L87 Difference]: Start difference. First operand 19667 states and 28077 transitions. Second operand 4 states. [2020-10-28 00:10:26,339 WARN L193 SmtUtils]: Spent 217.00 ms on a formula simplification that was a NOOP. DAG size: 155 [2020-10-28 00:10:28,714 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 00:10:28,714 INFO L93 Difference]: Finished difference Result 41101 states and 58507 transitions. [2020-10-28 00:10:28,715 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 00:10:28,715 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 83 [2020-10-28 00:10:28,715 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 00:10:28,771 INFO L225 Difference]: With dead ends: 41101 [2020-10-28 00:10:28,771 INFO L226 Difference]: Without dead ends: 27786 [2020-10-28 00:10:28,807 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-28 00:10:28,851 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27786 states. [2020-10-28 00:10:30,871 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27786 to 26631. [2020-10-28 00:10:30,871 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26631 states. [2020-10-28 00:10:30,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26631 states to 26631 states and 37509 transitions. [2020-10-28 00:10:30,913 INFO L78 Accepts]: Start accepts. Automaton has 26631 states and 37509 transitions. Word has length 83 [2020-10-28 00:10:30,913 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 00:10:30,913 INFO L481 AbstractCegarLoop]: Abstraction has 26631 states and 37509 transitions. [2020-10-28 00:10:30,913 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 00:10:30,913 INFO L276 IsEmpty]: Start isEmpty. Operand 26631 states and 37509 transitions. [2020-10-28 00:10:30,923 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2020-10-28 00:10:30,923 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 00:10:30,923 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 00:10:30,924 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-28 00:10:30,924 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 00:10:30,924 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 00:10:30,924 INFO L82 PathProgramCache]: Analyzing trace with hash 1847054984, now seen corresponding path program 1 times [2020-10-28 00:10:30,924 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 00:10:30,925 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [996709855] [2020-10-28 00:10:30,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 00:10:31,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:10:31,075 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:10:31,096 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:10:31,166 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:10:31,244 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:10:31,399 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:10:32,590 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:10:36,063 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:10:36,064 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 91 [2020-10-28 00:10:36,064 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-28 00:10:36,064 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-28 00:10:36,064 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:10:36,064 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 00:10:36,064 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 56 [2020-10-28 00:10:36,064 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-10-28 00:10:36,064 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:10:36,313 WARN L193 SmtUtils]: Spent 221.00 ms on a formula simplification that was a NOOP. DAG size: 151 [2020-10-28 00:10:36,314 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 00:10:36,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:10:36,322 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:10:36,328 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:10:36,329 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 00:10:36,329 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 00:10:36,329 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-28 00:10:36,329 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:10:36,329 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 00:10:36,329 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 00:10:36,329 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 00:10:36,329 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:10:36,342 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 00:10:36,342 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [996709855] [2020-10-28 00:10:36,342 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 00:10:36,342 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 00:10:36,343 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1857194456] [2020-10-28 00:10:36,343 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 00:10:36,343 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 00:10:36,344 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 00:10:36,344 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 00:10:36,344 INFO L87 Difference]: Start difference. First operand 26631 states and 37509 transitions. Second operand 4 states. [2020-10-28 00:10:36,616 WARN L193 SmtUtils]: Spent 238.00 ms on a formula simplification that was a NOOP. DAG size: 155 [2020-10-28 00:10:39,149 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 00:10:39,149 INFO L93 Difference]: Finished difference Result 43040 states and 60412 transitions. [2020-10-28 00:10:39,150 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 00:10:39,150 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 83 [2020-10-28 00:10:39,150 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 00:10:39,195 INFO L225 Difference]: With dead ends: 43040 [2020-10-28 00:10:39,195 INFO L226 Difference]: Without dead ends: 27752 [2020-10-28 00:10:39,225 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-28 00:10:39,254 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27752 states. [2020-10-28 00:10:41,219 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27752 to 26847. [2020-10-28 00:10:41,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26847 states. [2020-10-28 00:10:41,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26847 states to 26847 states and 37224 transitions. [2020-10-28 00:10:41,257 INFO L78 Accepts]: Start accepts. Automaton has 26847 states and 37224 transitions. Word has length 83 [2020-10-28 00:10:41,258 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 00:10:41,258 INFO L481 AbstractCegarLoop]: Abstraction has 26847 states and 37224 transitions. [2020-10-28 00:10:41,258 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 00:10:41,258 INFO L276 IsEmpty]: Start isEmpty. Operand 26847 states and 37224 transitions. [2020-10-28 00:10:41,266 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2020-10-28 00:10:41,266 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 00:10:41,267 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 00:10:41,267 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-28 00:10:41,267 INFO L429 AbstractCegarLoop]: === Iteration 14 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 00:10:41,267 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 00:10:41,268 INFO L82 PathProgramCache]: Analyzing trace with hash -373647486, now seen corresponding path program 1 times [2020-10-28 00:10:41,268 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 00:10:41,268 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1935208934] [2020-10-28 00:10:41,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 00:10:41,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:10:41,309 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:10:41,349 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:10:41,374 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:10:41,705 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:10:41,882 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:10:42,960 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:10:42,960 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 91 [2020-10-28 00:10:42,960 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-28 00:10:42,961 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1667 [2020-10-28 00:10:42,961 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:10:42,961 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 00:10:42,961 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 36 [2020-10-28 00:10:42,961 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 35 [2020-10-28 00:10:42,961 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:10:43,212 WARN L193 SmtUtils]: Spent 201.00 ms on a formula simplification that was a NOOP. DAG size: 151 [2020-10-28 00:10:43,213 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 00:10:43,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:10:43,220 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:10:43,227 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:10:43,227 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 00:10:43,227 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 00:10:43,228 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-28 00:10:43,228 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:10:43,228 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 00:10:43,228 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 00:10:43,228 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 00:10:43,228 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:10:43,243 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 8 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 00:10:43,244 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1935208934] [2020-10-28 00:10:43,244 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 00:10:43,244 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-28 00:10:43,244 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2012485282] [2020-10-28 00:10:43,245 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-28 00:10:43,245 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 00:10:43,246 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-28 00:10:43,246 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-28 00:10:43,246 INFO L87 Difference]: Start difference. First operand 26847 states and 37224 transitions. Second operand 6 states. [2020-10-28 00:10:45,039 WARN L193 SmtUtils]: Spent 236.00 ms on a formula simplification that was a NOOP. DAG size: 153 [2020-10-28 00:10:45,529 WARN L193 SmtUtils]: Spent 236.00 ms on a formula simplification that was a NOOP. DAG size: 152 [2020-10-28 00:10:50,214 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 00:10:50,214 INFO L93 Difference]: Finished difference Result 104242 states and 143909 transitions. [2020-10-28 00:10:50,214 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-28 00:10:50,214 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 83 [2020-10-28 00:10:50,215 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 00:10:50,310 INFO L225 Difference]: With dead ends: 104242 [2020-10-28 00:10:50,310 INFO L226 Difference]: Without dead ends: 77434 [2020-10-28 00:10:50,340 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2020-10-28 00:10:50,414 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77434 states. [2020-10-28 00:10:54,235 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77434 to 37498. [2020-10-28 00:10:54,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37498 states. [2020-10-28 00:10:54,296 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37498 states to 37498 states and 50806 transitions. [2020-10-28 00:10:54,296 INFO L78 Accepts]: Start accepts. Automaton has 37498 states and 50806 transitions. Word has length 83 [2020-10-28 00:10:54,296 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 00:10:54,296 INFO L481 AbstractCegarLoop]: Abstraction has 37498 states and 50806 transitions. [2020-10-28 00:10:54,296 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-28 00:10:54,296 INFO L276 IsEmpty]: Start isEmpty. Operand 37498 states and 50806 transitions. [2020-10-28 00:10:54,305 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2020-10-28 00:10:54,306 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 00:10:54,306 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 00:10:54,306 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-28 00:10:54,306 INFO L429 AbstractCegarLoop]: === Iteration 15 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 00:10:54,307 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 00:10:54,307 INFO L82 PathProgramCache]: Analyzing trace with hash 1248976113, now seen corresponding path program 1 times [2020-10-28 00:10:54,307 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 00:10:54,307 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1522071519] [2020-10-28 00:10:54,307 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 00:10:54,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:10:54,350 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:10:54,389 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:10:54,472 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:10:54,641 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:10:55,064 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:10:56,352 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:10:56,352 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 91 [2020-10-28 00:10:56,352 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-28 00:10:56,352 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2017 [2020-10-28 00:10:56,352 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:10:56,352 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 00:10:56,353 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 36 [2020-10-28 00:10:56,353 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 39 [2020-10-28 00:10:56,353 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:10:56,615 WARN L193 SmtUtils]: Spent 209.00 ms on a formula simplification that was a NOOP. DAG size: 151 [2020-10-28 00:10:56,616 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 00:10:56,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:10:56,624 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:10:56,630 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:10:56,630 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 00:10:56,630 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 00:10:56,630 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-28 00:10:56,630 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:10:56,631 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 00:10:56,631 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 00:10:56,631 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 00:10:56,631 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:10:56,644 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 00:10:56,645 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1522071519] [2020-10-28 00:10:56,645 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 00:10:56,645 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-28 00:10:56,645 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [421959028] [2020-10-28 00:10:56,645 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-28 00:10:56,645 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 00:10:56,646 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-28 00:10:56,646 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-28 00:10:56,646 INFO L87 Difference]: Start difference. First operand 37498 states and 50806 transitions. Second operand 6 states. [2020-10-28 00:10:58,241 WARN L193 SmtUtils]: Spent 219.00 ms on a formula simplification that was a NOOP. DAG size: 153 [2020-10-28 00:10:58,905 WARN L193 SmtUtils]: Spent 238.00 ms on a formula simplification that was a NOOP. DAG size: 152 [2020-10-28 00:11:05,396 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 00:11:05,396 INFO L93 Difference]: Finished difference Result 120991 states and 163209 transitions. [2020-10-28 00:11:05,397 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-28 00:11:05,397 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 83 [2020-10-28 00:11:05,397 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 00:11:05,501 INFO L225 Difference]: With dead ends: 120991 [2020-10-28 00:11:05,502 INFO L226 Difference]: Without dead ends: 83561 [2020-10-28 00:11:05,541 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2020-10-28 00:11:05,616 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83561 states. [2020-10-28 00:11:09,877 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83561 to 46080. [2020-10-28 00:11:09,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46080 states. [2020-10-28 00:11:09,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46080 states to 46080 states and 61676 transitions. [2020-10-28 00:11:09,948 INFO L78 Accepts]: Start accepts. Automaton has 46080 states and 61676 transitions. Word has length 83 [2020-10-28 00:11:09,948 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 00:11:09,948 INFO L481 AbstractCegarLoop]: Abstraction has 46080 states and 61676 transitions. [2020-10-28 00:11:09,948 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-28 00:11:09,948 INFO L276 IsEmpty]: Start isEmpty. Operand 46080 states and 61676 transitions. [2020-10-28 00:11:09,956 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2020-10-28 00:11:09,957 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 00:11:09,957 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 00:11:09,957 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-28 00:11:09,957 INFO L429 AbstractCegarLoop]: === Iteration 16 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 00:11:09,957 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 00:11:09,958 INFO L82 PathProgramCache]: Analyzing trace with hash -551896553, now seen corresponding path program 1 times [2020-10-28 00:11:09,958 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 00:11:09,958 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [157545068] [2020-10-28 00:11:09,958 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 00:11:09,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:11:09,997 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:11:10,024 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:11:10,057 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:11:10,301 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:11:10,582 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:11:10,768 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:11:10,820 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:11:13,381 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:11:14,983 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:11:14,983 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 91 [2020-10-28 00:11:14,983 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-28 00:11:14,983 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-28 00:11:14,983 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:11:14,984 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 00:11:14,984 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 39 [2020-10-28 00:11:14,984 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 29 [2020-10-28 00:11:14,984 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:11:15,211 WARN L193 SmtUtils]: Spent 201.00 ms on a formula simplification that was a NOOP. DAG size: 151 [2020-10-28 00:11:15,212 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 00:11:15,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:11:15,218 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:11:15,223 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:11:15,223 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 00:11:15,223 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 00:11:15,223 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-28 00:11:15,223 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:11:15,223 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 00:11:15,223 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 00:11:15,223 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 00:11:15,223 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:11:15,238 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 00:11:15,238 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [157545068] [2020-10-28 00:11:15,238 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 00:11:15,238 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 00:11:15,239 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [665602157] [2020-10-28 00:11:15,239 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 00:11:15,239 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 00:11:15,240 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 00:11:15,240 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 00:11:15,240 INFO L87 Difference]: Start difference. First operand 46080 states and 61676 transitions. Second operand 4 states. [2020-10-28 00:11:15,565 WARN L193 SmtUtils]: Spent 285.00 ms on a formula simplification that was a NOOP. DAG size: 155 [2020-10-28 00:11:21,756 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 00:11:21,756 INFO L93 Difference]: Finished difference Result 111130 states and 148977 transitions. [2020-10-28 00:11:21,757 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 00:11:21,757 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 83 [2020-10-28 00:11:21,757 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 00:11:21,855 INFO L225 Difference]: With dead ends: 111130 [2020-10-28 00:11:21,855 INFO L226 Difference]: Without dead ends: 70060 [2020-10-28 00:11:21,893 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-28 00:11:21,952 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70060 states. [2020-10-28 00:11:28,223 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70060 to 69908. [2020-10-28 00:11:28,223 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69908 states. [2020-10-28 00:11:28,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69908 states to 69908 states and 92895 transitions. [2020-10-28 00:11:28,321 INFO L78 Accepts]: Start accepts. Automaton has 69908 states and 92895 transitions. Word has length 83 [2020-10-28 00:11:28,321 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 00:11:28,321 INFO L481 AbstractCegarLoop]: Abstraction has 69908 states and 92895 transitions. [2020-10-28 00:11:28,321 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 00:11:28,322 INFO L276 IsEmpty]: Start isEmpty. Operand 69908 states and 92895 transitions. [2020-10-28 00:11:28,332 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2020-10-28 00:11:28,332 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 00:11:28,332 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 00:11:28,332 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-28 00:11:28,332 INFO L429 AbstractCegarLoop]: === Iteration 17 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 00:11:28,332 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 00:11:28,333 INFO L82 PathProgramCache]: Analyzing trace with hash 998805402, now seen corresponding path program 1 times [2020-10-28 00:11:28,333 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 00:11:28,333 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1243870697] [2020-10-28 00:11:28,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 00:11:28,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:11:28,361 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:11:28,384 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:11:28,430 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:11:28,601 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:11:28,795 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:11:30,309 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:11:30,309 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 91 [2020-10-28 00:11:30,309 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-28 00:11:30,309 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1958 [2020-10-28 00:11:30,309 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:11:30,310 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 00:11:30,310 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 36 [2020-10-28 00:11:30,312 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 43 [2020-10-28 00:11:30,312 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-28 00:11:30,552 WARN L193 SmtUtils]: Spent 192.00 ms on a formula simplification that was a NOOP. DAG size: 151 [2020-10-28 00:11:30,553 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 00:11:30,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:11:30,561 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:11:30,568 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:11:30,568 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 00:11:30,568 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 00:11:30,568 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-28 00:11:30,569 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:11:30,569 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 00:11:30,569 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 00:11:30,569 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 00:11:30,569 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:11:30,580 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 00:11:30,581 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1243870697] [2020-10-28 00:11:30,581 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 00:11:30,581 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-28 00:11:30,581 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1731780189] [2020-10-28 00:11:30,581 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-28 00:11:30,581 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 00:11:30,582 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-28 00:11:30,582 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-28 00:11:30,582 INFO L87 Difference]: Start difference. First operand 69908 states and 92895 transitions. Second operand 6 states. [2020-10-28 00:11:32,929 WARN L193 SmtUtils]: Spent 236.00 ms on a formula simplification that was a NOOP. DAG size: 153 [2020-10-28 00:11:33,586 WARN L193 SmtUtils]: Spent 218.00 ms on a formula simplification that was a NOOP. DAG size: 152 [2020-10-28 00:11:45,713 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 00:11:45,713 INFO L93 Difference]: Finished difference Result 214285 states and 283125 transitions. [2020-10-28 00:11:45,714 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-28 00:11:45,714 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 83 [2020-10-28 00:11:45,714 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 00:11:46,082 INFO L225 Difference]: With dead ends: 214285 [2020-10-28 00:11:46,082 INFO L226 Difference]: Without dead ends: 144528 [2020-10-28 00:11:46,141 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2020-10-28 00:11:46,231 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144528 states. [2020-10-28 00:11:54,600 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144528 to 85404. [2020-10-28 00:11:54,600 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85404 states. [2020-10-28 00:11:54,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85404 states to 85404 states and 112262 transitions. [2020-10-28 00:11:54,745 INFO L78 Accepts]: Start accepts. Automaton has 85404 states and 112262 transitions. Word has length 83 [2020-10-28 00:11:54,745 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 00:11:54,745 INFO L481 AbstractCegarLoop]: Abstraction has 85404 states and 112262 transitions. [2020-10-28 00:11:54,745 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-28 00:11:54,745 INFO L276 IsEmpty]: Start isEmpty. Operand 85404 states and 112262 transitions. [2020-10-28 00:11:54,759 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2020-10-28 00:11:54,760 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 00:11:54,760 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 00:11:54,760 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-28 00:11:54,760 INFO L429 AbstractCegarLoop]: === Iteration 18 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 00:11:54,760 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 00:11:54,760 INFO L82 PathProgramCache]: Analyzing trace with hash 1663041529, now seen corresponding path program 1 times [2020-10-28 00:11:54,761 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 00:11:54,761 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [462455355] [2020-10-28 00:11:54,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 00:11:54,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:11:54,791 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:11:54,819 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:11:54,848 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:11:54,944 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:11:55,356 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:11:55,444 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:11:56,067 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:11:56,300 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:11:56,347 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:11:56,445 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:11:57,322 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:11:57,541 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:11:59,788 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:11:59,788 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 93 [2020-10-28 00:11:59,788 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 12 [2020-10-28 00:11:59,788 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5008 [2020-10-28 00:11:59,788 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:11:59,788 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-28 00:11:59,788 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 36 [2020-10-28 00:11:59,788 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 44 [2020-10-28 00:11:59,788 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:12:00,252 WARN L193 SmtUtils]: Spent 214.00 ms on a formula simplification that was a NOOP. DAG size: 151 [2020-10-28 00:12:00,254 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 00:12:00,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:12:00,262 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:12:00,271 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:12:00,271 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 00:12:00,271 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 00:12:00,271 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-10-28 00:12:00,271 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:12:00,271 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 00:12:00,272 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 00:12:00,272 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 00:12:00,272 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:12:00,293 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 00:12:00,293 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [462455355] [2020-10-28 00:12:00,293 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 00:12:00,293 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-28 00:12:00,293 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [385017653] [2020-10-28 00:12:00,294 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-28 00:12:00,294 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 00:12:00,294 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-28 00:12:00,295 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2020-10-28 00:12:00,295 INFO L87 Difference]: Start difference. First operand 85404 states and 112262 transitions. Second operand 11 states. [2020-10-28 00:12:00,613 WARN L193 SmtUtils]: Spent 233.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-28 00:12:07,180 WARN L193 SmtUtils]: Spent 227.00 ms on a formula simplification that was a NOOP. DAG size: 156 [2020-10-28 00:12:08,615 WARN L193 SmtUtils]: Spent 220.00 ms on a formula simplification that was a NOOP. DAG size: 152 [2020-10-28 00:12:44,104 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 00:12:44,104 INFO L93 Difference]: Finished difference Result 442178 states and 575936 transitions. [2020-10-28 00:12:44,104 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2020-10-28 00:12:44,105 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 85 [2020-10-28 00:12:44,105 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 00:12:44,750 INFO L225 Difference]: With dead ends: 442178 [2020-10-28 00:12:44,750 INFO L226 Difference]: Without dead ends: 356921 [2020-10-28 00:12:44,857 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1199 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=721, Invalid=3061, Unknown=0, NotChecked=0, Total=3782 [2020-10-28 00:12:45,124 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 356921 states. [2020-10-28 00:12:57,952 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 356921 to 99958. [2020-10-28 00:12:57,952 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99958 states. [2020-10-28 00:12:58,142 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99958 states to 99958 states and 131587 transitions. [2020-10-28 00:12:58,142 INFO L78 Accepts]: Start accepts. Automaton has 99958 states and 131587 transitions. Word has length 85 [2020-10-28 00:12:58,143 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 00:12:58,143 INFO L481 AbstractCegarLoop]: Abstraction has 99958 states and 131587 transitions. [2020-10-28 00:12:58,143 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-28 00:12:58,143 INFO L276 IsEmpty]: Start isEmpty. Operand 99958 states and 131587 transitions. [2020-10-28 00:12:58,160 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2020-10-28 00:12:58,161 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 00:12:58,161 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 00:12:58,161 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-28 00:12:58,161 INFO L429 AbstractCegarLoop]: === Iteration 19 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 00:12:58,161 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 00:12:58,162 INFO L82 PathProgramCache]: Analyzing trace with hash 1484792462, now seen corresponding path program 1 times [2020-10-28 00:12:58,162 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 00:12:58,162 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [965210743] [2020-10-28 00:12:58,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 00:12:58,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:12:58,192 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:12:58,226 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:12:58,256 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:12:58,454 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:12:58,919 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:12:59,138 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:12:59,217 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:12:59,482 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:13:00,483 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:13:00,715 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:13:00,902 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:13:01,009 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:13:03,181 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:13:03,181 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 93 [2020-10-28 00:13:03,181 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 12 [2020-10-28 00:13:03,181 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-28 00:13:03,181 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:13:03,181 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-28 00:13:03,182 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 36 [2020-10-28 00:13:03,182 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 40 [2020-10-28 00:13:03,182 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:13:03,424 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 27 [2020-10-28 00:13:03,736 WARN L193 SmtUtils]: Spent 224.00 ms on a formula simplification that was a NOOP. DAG size: 151 [2020-10-28 00:13:03,737 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 00:13:03,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:13:03,743 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:13:03,747 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:13:03,748 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 00:13:03,748 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 00:13:03,748 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-28 00:13:03,748 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:13:03,748 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 00:13:03,748 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 00:13:03,748 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 00:13:03,748 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:13:03,767 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 8 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 00:13:03,767 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [965210743] [2020-10-28 00:13:03,767 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 00:13:03,767 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-28 00:13:03,767 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1023061207] [2020-10-28 00:13:03,768 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-28 00:13:03,768 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 00:13:03,768 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-28 00:13:03,768 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2020-10-28 00:13:03,769 INFO L87 Difference]: Start difference. First operand 99958 states and 131587 transitions. Second operand 11 states. [2020-10-28 00:13:04,092 WARN L193 SmtUtils]: Spent 255.00 ms on a formula simplification that was a NOOP. DAG size: 157