/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=SHALLOWEST --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.3.ufo.BOUNDED-6.pals.c.v+sep-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-27 05:11:53,612 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-27 05:11:53,615 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-27 05:11:53,652 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-27 05:11:53,652 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-27 05:11:53,654 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-27 05:11:53,656 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-27 05:11:53,659 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-27 05:11:53,662 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-27 05:11:53,663 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-27 05:11:53,665 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-27 05:11:53,666 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-27 05:11:53,667 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-27 05:11:53,668 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-27 05:11:53,670 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-27 05:11:53,671 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-27 05:11:53,672 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-27 05:11:53,673 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-27 05:11:53,686 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-27 05:11:53,689 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-27 05:11:53,691 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-27 05:11:53,695 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-27 05:11:53,697 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-27 05:11:53,699 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-27 05:11:53,710 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-27 05:11:53,711 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-27 05:11:53,713 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-27 05:11:53,715 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-27 05:11:53,715 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-27 05:11:53,720 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-27 05:11:53,720 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-27 05:11:53,721 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-27 05:11:53,723 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-27 05:11:53,724 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-27 05:11:53,725 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-27 05:11:53,726 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-27 05:11:53,728 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-27 05:11:53,728 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-27 05:11:53,728 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-27 05:11:53,729 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-27 05:11:53,731 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-27 05:11:53,732 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-27 05:11:53,794 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-27 05:11:53,794 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-27 05:11:53,796 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-27 05:11:53,796 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-27 05:11:53,796 INFO L138 SettingsManager]: * Use SBE=true [2020-10-27 05:11:53,796 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-27 05:11:53,797 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-27 05:11:53,797 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-27 05:11:53,798 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-27 05:11:53,798 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-27 05:11:53,799 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-27 05:11:53,799 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-27 05:11:53,799 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-27 05:11:53,799 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-27 05:11:53,800 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-27 05:11:53,800 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-27 05:11:53,800 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-27 05:11:53,800 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-27 05:11:53,801 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-27 05:11:53,801 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-27 05:11:53,801 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-27 05:11:53,801 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-27 05:11:53,802 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-27 05:11:53,802 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-27 05:11:53,802 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-27 05:11:53,802 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-27 05:11:53,802 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-27 05:11:53,803 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-27 05:11:53,803 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-27 05:11:53,803 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SHALLOWEST;log-additional-information=true;unknown-allowed=true; [2020-10-27 05:11:54,187 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-27 05:11:54,214 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-27 05:11:54,217 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-27 05:11:54,218 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-27 05:11:54,219 INFO L275 PluginConnector]: CDTParser initialized [2020-10-27 05:11:54,220 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_lcr.3.ufo.BOUNDED-6.pals.c.v+sep-reducer.c [2020-10-27 05:11:54,307 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/4591c085b/c2db0469b0f1457ba1a5a7b85edac954/FLAG3bdc4114c [2020-10-27 05:11:55,048 INFO L306 CDTParser]: Found 1 translation units. [2020-10-27 05:11:55,049 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/seq-mthreaded-reduced/pals_lcr.3.ufo.BOUNDED-6.pals.c.v+sep-reducer.c [2020-10-27 05:11:55,070 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/4591c085b/c2db0469b0f1457ba1a5a7b85edac954/FLAG3bdc4114c [2020-10-27 05:11:55,294 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/4591c085b/c2db0469b0f1457ba1a5a7b85edac954 [2020-10-27 05:11:55,297 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-27 05:11:55,303 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-27 05:11:55,305 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-27 05:11:55,306 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-27 05:11:55,310 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-27 05:11:55,311 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 05:11:55" (1/1) ... [2020-10-27 05:11:55,314 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@788f2800 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 05:11:55, skipping insertion in model container [2020-10-27 05:11:55,314 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 05:11:55" (1/1) ... [2020-10-27 05:11:55,323 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-27 05:11:55,381 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-27 05:11:55,829 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 05:11:55,845 INFO L203 MainTranslator]: Completed pre-run [2020-10-27 05:11:56,029 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 05:11:56,072 INFO L208 MainTranslator]: Completed translation [2020-10-27 05:11:56,073 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 05:11:56 WrapperNode [2020-10-27 05:11:56,073 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-27 05:11:56,074 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-27 05:11:56,075 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-27 05:11:56,075 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-27 05:11:56,089 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 05:11:56" (1/1) ... [2020-10-27 05:11:56,090 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 05:11:56" (1/1) ... [2020-10-27 05:11:56,129 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 05:11:56" (1/1) ... [2020-10-27 05:11:56,129 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 05:11:56" (1/1) ... [2020-10-27 05:11:56,187 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 05:11:56" (1/1) ... [2020-10-27 05:11:56,210 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 05:11:56" (1/1) ... [2020-10-27 05:11:56,226 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 05:11:56" (1/1) ... [2020-10-27 05:11:56,242 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-27 05:11:56,246 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-27 05:11:56,247 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-27 05:11:56,247 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-27 05:11:56,248 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 05:11:56" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-27 05:11:56,343 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-27 05:11:56,343 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-27 05:11:56,343 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-27 05:11:56,344 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-10-27 05:11:56,344 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-27 05:11:56,344 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-27 05:11:56,344 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-27 05:11:56,344 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-27 05:11:56,344 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-27 05:11:56,345 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-10-27 05:11:56,345 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-10-27 05:11:56,345 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2020-10-27 05:11:56,345 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-10-27 05:11:56,345 INFO L130 BoogieDeclarations]: Found specification of procedure read [2020-10-27 05:11:56,345 INFO L130 BoogieDeclarations]: Found specification of procedure write [2020-10-27 05:11:56,346 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2020-10-27 05:11:56,346 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2020-10-27 05:11:56,346 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2020-10-27 05:11:56,346 INFO L130 BoogieDeclarations]: Found specification of procedure init [2020-10-27 05:11:56,346 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-10-27 05:11:56,346 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-27 05:11:56,347 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-27 05:11:56,347 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-27 05:11:56,347 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-27 05:11:56,347 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-27 05:11:56,347 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-27 05:11:56,347 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-27 05:11:57,761 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-27 05:11:57,762 INFO L298 CfgBuilder]: Removed 0 assume(true) statements. [2020-10-27 05:11:57,764 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 05:11:57 BoogieIcfgContainer [2020-10-27 05:11:57,765 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-27 05:11:57,767 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-27 05:11:57,767 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-27 05:11:57,770 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-27 05:11:57,771 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.10 05:11:55" (1/3) ... [2020-10-27 05:11:57,772 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4a0b61da and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 05:11:57, skipping insertion in model container [2020-10-27 05:11:57,772 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 05:11:56" (2/3) ... [2020-10-27 05:11:57,772 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4a0b61da and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 05:11:57, skipping insertion in model container [2020-10-27 05:11:57,773 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 05:11:57" (3/3) ... [2020-10-27 05:11:57,774 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_lcr.3.ufo.BOUNDED-6.pals.c.v+sep-reducer.c [2020-10-27 05:11:57,787 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-27 05:11:57,793 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-27 05:11:57,808 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-27 05:11:57,839 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-27 05:11:57,839 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-27 05:11:57,839 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-27 05:11:57,840 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-27 05:11:57,840 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-27 05:11:57,840 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-27 05:11:57,840 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-27 05:11:57,840 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-27 05:11:57,866 INFO L276 IsEmpty]: Start isEmpty. Operand 288 states. [2020-10-27 05:11:57,879 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-10-27 05:11:57,879 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:11:57,880 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] [2020-10-27 05:11:57,881 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:11:57,887 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:11:57,888 INFO L82 PathProgramCache]: Analyzing trace with hash -439108496, now seen corresponding path program 1 times [2020-10-27 05:11:57,898 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:11:57,899 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [112188] [2020-10-27 05:11:57,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:11:58,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:11:58,361 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:11:58,627 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:11:59,263 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:11:59,434 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:11:59,957 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:12:00,634 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:12:01,048 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:12:01,242 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:12:01,814 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:12:02,083 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:12:02,492 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:12:02,960 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:12:03,248 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:12:03,248 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 61 [2020-10-27 05:12:03,248 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 12 [2020-10-27 05:12:03,248 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5006 [2020-10-27 05:12:03,251 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:12:03,252 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-27 05:12:03,252 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 05:12:03,253 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 49 [2020-10-27 05:12:03,253 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-10-27 05:12:04,058 WARN L193 SmtUtils]: Spent 328.00 ms on a formula simplification that was a NOOP. DAG size: 211 [2020-10-27 05:12:04,065 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:12:04,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:12:04,101 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:12:04,144 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:12:04,145 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:12:04,145 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:12:04,146 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 51 [2020-10-27 05:12:04,146 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:12:04,146 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 05:12:04,146 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:12:04,146 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 05:12:04,147 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:12:04,218 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 05:12:04,219 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [112188] [2020-10-27 05:12:04,222 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:12:04,222 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2020-10-27 05:12:04,223 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1297953614] [2020-10-27 05:12:04,231 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-27 05:12:04,231 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:12:04,253 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-27 05:12:04,254 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2020-10-27 05:12:04,257 INFO L87 Difference]: Start difference. First operand 288 states. Second operand 15 states. [2020-10-27 05:12:04,810 WARN L193 SmtUtils]: Spent 389.00 ms on a formula simplification that was a NOOP. DAG size: 222 [2020-10-27 05:12:07,503 WARN L193 SmtUtils]: Spent 401.00 ms on a formula simplification that was a NOOP. DAG size: 224 [2020-10-27 05:12:08,294 WARN L193 SmtUtils]: Spent 470.00 ms on a formula simplification that was a NOOP. DAG size: 222 [2020-10-27 05:12:08,779 WARN L193 SmtUtils]: Spent 431.00 ms on a formula simplification that was a NOOP. DAG size: 221 [2020-10-27 05:12:09,215 WARN L193 SmtUtils]: Spent 365.00 ms on a formula simplification that was a NOOP. DAG size: 215 [2020-10-27 05:12:09,642 WARN L193 SmtUtils]: Spent 375.00 ms on a formula simplification that was a NOOP. DAG size: 218 [2020-10-27 05:12:10,892 WARN L193 SmtUtils]: Spent 400.00 ms on a formula simplification that was a NOOP. DAG size: 223 [2020-10-27 05:12:11,345 WARN L193 SmtUtils]: Spent 397.00 ms on a formula simplification that was a NOOP. DAG size: 220 [2020-10-27 05:12:11,395 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:12:11,395 INFO L93 Difference]: Finished difference Result 904 states and 1452 transitions. [2020-10-27 05:12:11,398 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-27 05:12:11,400 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 53 [2020-10-27 05:12:11,401 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:12:11,422 INFO L225 Difference]: With dead ends: 904 [2020-10-27 05:12:11,422 INFO L226 Difference]: Without dead ends: 683 [2020-10-27 05:12:11,429 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 283 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=281, Invalid=979, Unknown=0, NotChecked=0, Total=1260 [2020-10-27 05:12:11,453 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 683 states. [2020-10-27 05:12:11,570 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 683 to 438. [2020-10-27 05:12:11,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 438 states. [2020-10-27 05:12:11,575 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 438 states to 438 states and 596 transitions. [2020-10-27 05:12:11,578 INFO L78 Accepts]: Start accepts. Automaton has 438 states and 596 transitions. Word has length 53 [2020-10-27 05:12:11,580 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:12:11,580 INFO L481 AbstractCegarLoop]: Abstraction has 438 states and 596 transitions. [2020-10-27 05:12:11,581 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-27 05:12:11,581 INFO L276 IsEmpty]: Start isEmpty. Operand 438 states and 596 transitions. [2020-10-27 05:12:11,593 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-10-27 05:12:11,593 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:12:11,593 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] [2020-10-27 05:12:11,593 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-27 05:12:11,594 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:12:11,596 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:12:11,597 INFO L82 PathProgramCache]: Analyzing trace with hash -1473566256, now seen corresponding path program 1 times [2020-10-27 05:12:11,597 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:12:11,599 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1343147092] [2020-10-27 05:12:11,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:12:11,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:12:11,677 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:12:11,749 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:12:11,860 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:12:12,250 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:12:12,532 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:12:13,170 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:12:13,487 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:12:14,282 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:12:14,380 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:12:16,665 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:12:16,665 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 61 [2020-10-27 05:12:16,666 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-27 05:12:16,666 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5015 [2020-10-27 05:12:16,666 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:12:16,666 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-27 05:12:16,666 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 05:12:16,667 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 47 [2020-10-27 05:12:16,667 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:12:17,269 WARN L193 SmtUtils]: Spent 347.00 ms on a formula simplification that was a NOOP. DAG size: 211 [2020-10-27 05:12:17,276 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:12:17,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:12:17,304 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:12:17,334 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:12:17,334 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:12:17,336 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:12:17,336 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 36 [2020-10-27 05:12:17,336 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:12:17,336 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 05:12:17,336 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:12:17,337 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 05:12:17,337 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:12:17,372 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 05:12:17,373 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1343147092] [2020-10-27 05:12:17,373 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:12:17,373 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-10-27 05:12:17,374 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [578916070] [2020-10-27 05:12:17,375 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-27 05:12:17,376 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:12:17,376 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-27 05:12:17,377 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2020-10-27 05:12:17,377 INFO L87 Difference]: Start difference. First operand 438 states and 596 transitions. Second operand 11 states. [2020-10-27 05:12:18,371 WARN L193 SmtUtils]: Spent 860.00 ms on a formula simplification. DAG size of input: 231 DAG size of output: 228 [2020-10-27 05:12:20,505 WARN L193 SmtUtils]: Spent 770.00 ms on a formula simplification. DAG size of input: 229 DAG size of output: 226 [2020-10-27 05:12:21,073 WARN L193 SmtUtils]: Spent 375.00 ms on a formula simplification that was a NOOP. DAG size: 215 [2020-10-27 05:12:22,576 WARN L193 SmtUtils]: Spent 756.00 ms on a formula simplification. DAG size of input: 223 DAG size of output: 220 [2020-10-27 05:12:22,642 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:12:22,642 INFO L93 Difference]: Finished difference Result 1254 states and 1788 transitions. [2020-10-27 05:12:22,643 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-27 05:12:22,643 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 53 [2020-10-27 05:12:22,643 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:12:22,650 INFO L225 Difference]: With dead ends: 1254 [2020-10-27 05:12:22,650 INFO L226 Difference]: Without dead ends: 1015 [2020-10-27 05:12:22,654 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=163, Invalid=487, Unknown=0, NotChecked=0, Total=650 [2020-10-27 05:12:22,656 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1015 states. [2020-10-27 05:12:22,710 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1015 to 461. [2020-10-27 05:12:22,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 461 states. [2020-10-27 05:12:22,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 461 states to 461 states and 625 transitions. [2020-10-27 05:12:22,714 INFO L78 Accepts]: Start accepts. Automaton has 461 states and 625 transitions. Word has length 53 [2020-10-27 05:12:22,714 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:12:22,714 INFO L481 AbstractCegarLoop]: Abstraction has 461 states and 625 transitions. [2020-10-27 05:12:22,714 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-27 05:12:22,715 INFO L276 IsEmpty]: Start isEmpty. Operand 461 states and 625 transitions. [2020-10-27 05:12:22,716 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-10-27 05:12:22,717 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:12:22,717 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] [2020-10-27 05:12:22,717 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-27 05:12:22,717 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:12:22,718 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:12:22,718 INFO L82 PathProgramCache]: Analyzing trace with hash -199361388, now seen corresponding path program 1 times [2020-10-27 05:12:22,718 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:12:22,719 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [712134740] [2020-10-27 05:12:22,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:12:22,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:12:22,796 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:12:22,879 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:12:23,093 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:12:23,268 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:12:23,375 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:12:24,020 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:12:24,183 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:12:24,282 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:12:24,389 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:12:24,667 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:12:26,206 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:12:26,388 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:12:26,871 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:12:27,763 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:12:27,763 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 61 [2020-10-27 05:12:27,763 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 13 [2020-10-27 05:12:27,763 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5008 [2020-10-27 05:12:27,764 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:12:27,764 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-27 05:12:27,764 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 05:12:27,764 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 49 [2020-10-27 05:12:27,764 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:12:28,394 WARN L193 SmtUtils]: Spent 365.00 ms on a formula simplification that was a NOOP. DAG size: 211 [2020-10-27 05:12:28,397 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:12:28,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:12:28,413 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:12:28,439 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:12:28,439 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:12:28,439 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:12:28,439 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 31 [2020-10-27 05:12:28,440 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:12:28,440 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 05:12:28,440 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:12:28,440 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 05:12:28,440 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:12:28,488 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 05:12:28,488 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [712134740] [2020-10-27 05:12:28,489 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:12:28,489 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-10-27 05:12:28,489 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2139018166] [2020-10-27 05:12:28,490 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-27 05:12:28,490 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:12:28,491 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-27 05:12:28,491 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2020-10-27 05:12:28,492 INFO L87 Difference]: Start difference. First operand 461 states and 625 transitions. Second operand 11 states. [2020-10-27 05:12:29,463 WARN L193 SmtUtils]: Spent 864.00 ms on a formula simplification. DAG size of input: 228 DAG size of output: 226 [2020-10-27 05:12:31,389 WARN L193 SmtUtils]: Spent 808.00 ms on a formula simplification. DAG size of input: 226 DAG size of output: 223 [2020-10-27 05:12:31,855 WARN L193 SmtUtils]: Spent 355.00 ms on a formula simplification that was a NOOP. DAG size: 218 [2020-10-27 05:12:32,259 WARN L193 SmtUtils]: Spent 341.00 ms on a formula simplification that was a NOOP. DAG size: 215 [2020-10-27 05:12:33,080 WARN L193 SmtUtils]: Spent 344.00 ms on a formula simplification that was a NOOP. DAG size: 217 [2020-10-27 05:12:33,132 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:12:33,132 INFO L93 Difference]: Finished difference Result 758 states and 1041 transitions. [2020-10-27 05:12:33,132 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-27 05:12:33,133 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 53 [2020-10-27 05:12:33,133 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:12:33,138 INFO L225 Difference]: With dead ends: 758 [2020-10-27 05:12:33,138 INFO L226 Difference]: Without dead ends: 702 [2020-10-27 05:12:33,139 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=110, Invalid=310, Unknown=0, NotChecked=0, Total=420 [2020-10-27 05:12:33,140 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 702 states. [2020-10-27 05:12:33,182 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 702 to 471. [2020-10-27 05:12:33,182 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 471 states. [2020-10-27 05:12:33,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 471 states to 471 states and 638 transitions. [2020-10-27 05:12:33,185 INFO L78 Accepts]: Start accepts. Automaton has 471 states and 638 transitions. Word has length 53 [2020-10-27 05:12:33,185 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:12:33,186 INFO L481 AbstractCegarLoop]: Abstraction has 471 states and 638 transitions. [2020-10-27 05:12:33,186 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-27 05:12:33,186 INFO L276 IsEmpty]: Start isEmpty. Operand 471 states and 638 transitions. [2020-10-27 05:12:33,187 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-10-27 05:12:33,187 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:12:33,188 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] [2020-10-27 05:12:33,188 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-27 05:12:33,188 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:12:33,188 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:12:33,188 INFO L82 PathProgramCache]: Analyzing trace with hash 258867246, now seen corresponding path program 1 times [2020-10-27 05:12:33,189 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:12:33,189 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1922128086] [2020-10-27 05:12:33,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:12:33,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:12:33,258 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:12:33,331 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:12:33,423 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:12:33,682 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:12:33,743 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:12:34,162 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:12:34,221 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:12:34,895 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:12:35,527 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:12:35,887 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:12:38,252 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:12:38,253 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 63 [2020-10-27 05:12:38,253 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 10 [2020-10-27 05:12:38,253 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5022 [2020-10-27 05:12:38,253 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:12:38,253 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-27 05:12:38,254 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 05:12:38,254 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 42 [2020-10-27 05:12:38,254 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:12:38,970 WARN L193 SmtUtils]: Spent 366.00 ms on a formula simplification that was a NOOP. DAG size: 211 [2020-10-27 05:12:38,971 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:12:38,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:12:38,994 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:12:39,015 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:12:39,016 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:12:39,016 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:12:39,016 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 27 [2020-10-27 05:12:39,016 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:12:39,016 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 05:12:39,016 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:12:39,017 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 05:12:39,017 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:12:39,048 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 05:12:39,049 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1922128086] [2020-10-27 05:12:39,050 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:12:39,050 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-10-27 05:12:39,050 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [711899007] [2020-10-27 05:12:39,051 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-27 05:12:39,051 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:12:39,052 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-27 05:12:39,052 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2020-10-27 05:12:39,052 INFO L87 Difference]: Start difference. First operand 471 states and 638 transitions. Second operand 11 states. [2020-10-27 05:12:39,550 WARN L193 SmtUtils]: Spent 407.00 ms on a formula simplification that was a NOOP. DAG size: 229 [2020-10-27 05:12:41,740 WARN L193 SmtUtils]: Spent 836.00 ms on a formula simplification. DAG size of input: 223 DAG size of output: 220 [2020-10-27 05:12:42,661 WARN L193 SmtUtils]: Spent 883.00 ms on a formula simplification. DAG size of input: 229 DAG size of output: 228 [2020-10-27 05:12:43,104 WARN L193 SmtUtils]: Spent 400.00 ms on a formula simplification that was a NOOP. DAG size: 220 [2020-10-27 05:12:45,171 WARN L193 SmtUtils]: Spent 834.00 ms on a formula simplification. DAG size of input: 227 DAG size of output: 225 [2020-10-27 05:12:45,244 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:12:45,245 INFO L93 Difference]: Finished difference Result 1207 states and 1721 transitions. [2020-10-27 05:12:45,245 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-27 05:12:45,245 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 55 [2020-10-27 05:12:45,246 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:12:45,252 INFO L225 Difference]: With dead ends: 1207 [2020-10-27 05:12:45,252 INFO L226 Difference]: Without dead ends: 980 [2020-10-27 05:12:45,254 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=149, Invalid=357, Unknown=0, NotChecked=0, Total=506 [2020-10-27 05:12:45,256 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 980 states. [2020-10-27 05:12:45,321 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 980 to 529. [2020-10-27 05:12:45,322 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 529 states. [2020-10-27 05:12:45,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 529 states to 529 states and 735 transitions. [2020-10-27 05:12:45,325 INFO L78 Accepts]: Start accepts. Automaton has 529 states and 735 transitions. Word has length 55 [2020-10-27 05:12:45,325 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:12:45,326 INFO L481 AbstractCegarLoop]: Abstraction has 529 states and 735 transitions. [2020-10-27 05:12:45,326 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-27 05:12:45,326 INFO L276 IsEmpty]: Start isEmpty. Operand 529 states and 735 transitions. [2020-10-27 05:12:45,327 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-10-27 05:12:45,327 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:12:45,327 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] [2020-10-27 05:12:45,328 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-27 05:12:45,328 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:12:45,328 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:12:45,328 INFO L82 PathProgramCache]: Analyzing trace with hash -1224223678, now seen corresponding path program 1 times [2020-10-27 05:12:45,329 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:12:45,329 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1273482921] [2020-10-27 05:12:45,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:12:45,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:12:45,384 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:12:45,457 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:12:45,540 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:12:45,978 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:12:46,045 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:12:46,687 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:12:46,752 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:12:47,490 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:12:47,665 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:12:47,740 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:12:48,582 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:12:48,874 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:12:50,364 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:12:50,364 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 63 [2020-10-27 05:12:50,364 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 12 [2020-10-27 05:12:50,364 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-27 05:12:50,365 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:12:50,365 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-27 05:12:50,365 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 05:12:50,365 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 51 [2020-10-27 05:12:50,365 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:12:50,979 WARN L193 SmtUtils]: Spent 331.00 ms on a formula simplification that was a NOOP. DAG size: 211 [2020-10-27 05:12:50,980 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:12:50,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:12:50,995 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:12:51,017 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:12:51,017 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:12:51,017 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:12:51,017 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 26 [2020-10-27 05:12:51,017 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:12:51,018 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 05:12:51,018 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:12:51,018 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 05:12:51,018 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:12:51,050 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 05:12:51,050 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1273482921] [2020-10-27 05:12:51,051 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:12:51,051 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2020-10-27 05:12:51,051 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [51127945] [2020-10-27 05:12:51,052 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-27 05:12:51,053 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:12:51,063 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-27 05:12:51,064 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2020-10-27 05:12:51,064 INFO L87 Difference]: Start difference. First operand 529 states and 735 transitions. Second operand 13 states. [2020-10-27 05:12:52,106 WARN L193 SmtUtils]: Spent 921.00 ms on a formula simplification. DAG size of input: 233 DAG size of output: 231 [2020-10-27 05:12:54,660 WARN L193 SmtUtils]: Spent 889.00 ms on a formula simplification. DAG size of input: 226 DAG size of output: 224 [2020-10-27 05:12:55,632 WARN L193 SmtUtils]: Spent 852.00 ms on a formula simplification. DAG size of input: 226 DAG size of output: 225 [2020-10-27 05:12:56,025 WARN L193 SmtUtils]: Spent 340.00 ms on a formula simplification that was a NOOP. DAG size: 215 [2020-10-27 05:12:56,610 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:12:56,611 INFO L93 Difference]: Finished difference Result 707 states and 963 transitions. [2020-10-27 05:12:56,611 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-27 05:12:56,612 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 55 [2020-10-27 05:12:56,612 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:12:56,617 INFO L225 Difference]: With dead ends: 707 [2020-10-27 05:12:56,617 INFO L226 Difference]: Without dead ends: 693 [2020-10-27 05:12:56,618 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 149 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=181, Invalid=575, Unknown=0, NotChecked=0, Total=756 [2020-10-27 05:12:56,619 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 693 states. [2020-10-27 05:12:56,683 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 693 to 537. [2020-10-27 05:12:56,683 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 537 states. [2020-10-27 05:12:56,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 537 states to 537 states and 747 transitions. [2020-10-27 05:12:56,686 INFO L78 Accepts]: Start accepts. Automaton has 537 states and 747 transitions. Word has length 55 [2020-10-27 05:12:56,687 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:12:56,687 INFO L481 AbstractCegarLoop]: Abstraction has 537 states and 747 transitions. [2020-10-27 05:12:56,687 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-27 05:12:56,687 INFO L276 IsEmpty]: Start isEmpty. Operand 537 states and 747 transitions. [2020-10-27 05:12:56,689 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-10-27 05:12:56,689 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:12:56,689 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] [2020-10-27 05:12:56,689 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-27 05:12:56,690 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:12:56,690 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:12:56,690 INFO L82 PathProgramCache]: Analyzing trace with hash 1890648806, now seen corresponding path program 1 times [2020-10-27 05:12:56,690 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:12:56,691 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1983343272] [2020-10-27 05:12:56,691 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:12:56,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:12:56,742 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:12:56,816 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:12:56,922 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:12:57,199 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:12:57,261 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:12:57,505 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:12:57,926 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:12:58,627 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:12:58,833 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:12:59,820 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:13:00,089 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:13:00,308 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:13:00,943 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:13:01,275 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:13:01,736 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:13:01,737 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 63 [2020-10-27 05:13:01,737 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 14 [2020-10-27 05:13:01,737 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5015 [2020-10-27 05:13:01,737 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:13:01,738 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-27 05:13:01,738 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 05:13:01,738 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 50 [2020-10-27 05:13:01,738 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:13:02,297 WARN L193 SmtUtils]: Spent 375.00 ms on a formula simplification that was a NOOP. DAG size: 211 [2020-10-27 05:13:02,298 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:13:02,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:13:02,321 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:13:02,350 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:13:02,351 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:13:02,351 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:13:02,351 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 36 [2020-10-27 05:13:02,351 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:13:02,351 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 05:13:02,352 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:13:02,353 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 05:13:02,353 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 05:13:02,394 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 05:13:02,394 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1983343272] [2020-10-27 05:13:02,397 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:13:02,397 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2020-10-27 05:13:02,397 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [143507192] [2020-10-27 05:13:02,398 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-27 05:13:02,399 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:13:02,400 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-27 05:13:02,401 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2020-10-27 05:13:02,401 INFO L87 Difference]: Start difference. First operand 537 states and 747 transitions. Second operand 12 states. [2020-10-27 05:13:03,446 WARN L193 SmtUtils]: Spent 885.00 ms on a formula simplification. DAG size of input: 228 DAG size of output: 227 [2020-10-27 05:13:05,926 WARN L193 SmtUtils]: Spent 913.00 ms on a formula simplification. DAG size of input: 231 DAG size of output: 230 [2020-10-27 05:13:06,910 WARN L193 SmtUtils]: Spent 858.00 ms on a formula simplification. DAG size of input: 231 DAG size of output: 231 [2020-10-27 05:13:09,224 WARN L193 SmtUtils]: Spent 802.00 ms on a formula simplification. DAG size of input: 226 DAG size of output: 225 [2020-10-27 05:13:10,101 WARN L193 SmtUtils]: Spent 815.00 ms on a formula simplification. DAG size of input: 226 DAG size of output: 226 [2020-10-27 05:13:10,492 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:13:10,493 INFO L93 Difference]: Finished difference Result 1903 states and 2774 transitions. [2020-10-27 05:13:10,493 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-10-27 05:13:10,493 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 55 [2020-10-27 05:13:10,494 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:13:10,503 INFO L225 Difference]: With dead ends: 1903 [2020-10-27 05:13:10,504 INFO L226 Difference]: Without dead ends: 1896 [2020-10-27 05:13:10,506 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 629 ImplicationChecksByTransitivity, 6.2s TimeCoverageRelationStatistics Valid=471, Invalid=1599, Unknown=0, NotChecked=0, Total=2070 [2020-10-27 05:13:10,509 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1896 states. [2020-10-27 05:13:10,602 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1896 to 537. [2020-10-27 05:13:10,603 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 537 states. [2020-10-27 05:13:10,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 537 states to 537 states and 746 transitions. [2020-10-27 05:13:10,605 INFO L78 Accepts]: Start accepts. Automaton has 537 states and 746 transitions. Word has length 55 [2020-10-27 05:13:10,606 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:13:10,606 INFO L481 AbstractCegarLoop]: Abstraction has 537 states and 746 transitions. [2020-10-27 05:13:10,606 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-27 05:13:10,606 INFO L276 IsEmpty]: Start isEmpty. Operand 537 states and 746 transitions. [2020-10-27 05:13:10,607 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-10-27 05:13:10,607 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:13:10,607 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] [2020-10-27 05:13:10,607 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-27 05:13:10,608 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:13:10,608 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:13:10,608 INFO L82 PathProgramCache]: Analyzing trace with hash 1919882281, now seen corresponding path program 1 times [2020-10-27 05:13:10,608 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:13:10,609 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [227369179] [2020-10-27 05:13:10,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:13:10,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:13:10,679 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:13:10,757 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:13:10,885 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:13:11,121 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:13:11,319 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:13:11,419 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:13:11,501 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:13:11,653 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:13:12,034 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:13:12,186 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:13:12,434 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:13:12,554 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:13:12,652 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:13:13,035 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:13:13,113 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:13:13,289 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:13:13,502 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:13:14,214 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:13:14,951 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:13:15,035 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:13:15,644 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:13:15,645 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 63 [2020-10-27 05:13:15,645 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 20 [2020-10-27 05:13:15,645 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5006 [2020-10-27 05:13:15,645 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:13:15,645 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-27 05:13:15,645 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 05:13:15,645 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 46 [2020-10-27 05:13:15,645 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:13:16,302 WARN L193 SmtUtils]: Spent 381.00 ms on a formula simplification that was a NOOP. DAG size: 211 [2020-10-27 05:13:16,303 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:13:16,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:13:16,325 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:13:16,338 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:13:16,339 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:13:16,339 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:13:16,339 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 17 [2020-10-27 05:13:16,339 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:13:16,339 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 05:13:16,339 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:13:16,339 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 05:13:16,339 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:13:16,360 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 05:13:16,361 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [227369179] [2020-10-27 05:13:16,361 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:13:16,361 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2020-10-27 05:13:16,361 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [664505646] [2020-10-27 05:13:16,362 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-27 05:13:16,362 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:13:16,362 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-27 05:13:16,362 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2020-10-27 05:13:16,363 INFO L87 Difference]: Start difference. First operand 537 states and 746 transitions. Second operand 13 states. [2020-10-27 05:13:16,952 WARN L193 SmtUtils]: Spent 483.00 ms on a formula simplification that was a NOOP. DAG size: 234 [2020-10-27 05:13:18,692 WARN L193 SmtUtils]: Spent 423.00 ms on a formula simplification that was a NOOP. DAG size: 222 [2020-10-27 05:13:19,125 WARN L193 SmtUtils]: Spent 380.00 ms on a formula simplification that was a NOOP. DAG size: 219 [2020-10-27 05:13:19,560 WARN L193 SmtUtils]: Spent 360.00 ms on a formula simplification that was a NOOP. DAG size: 216 [2020-10-27 05:13:20,353 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:13:20,353 INFO L93 Difference]: Finished difference Result 1561 states and 2272 transitions. [2020-10-27 05:13:20,353 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-27 05:13:20,354 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 55 [2020-10-27 05:13:20,354 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:13:20,359 INFO L225 Difference]: With dead ends: 1561 [2020-10-27 05:13:20,360 INFO L226 Difference]: Without dead ends: 1189 [2020-10-27 05:13:20,361 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 186 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=208, Invalid=662, Unknown=0, NotChecked=0, Total=870 [2020-10-27 05:13:20,363 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1189 states. [2020-10-27 05:13:20,448 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1189 to 510. [2020-10-27 05:13:20,448 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 510 states. [2020-10-27 05:13:20,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 510 states to 510 states and 710 transitions. [2020-10-27 05:13:20,450 INFO L78 Accepts]: Start accepts. Automaton has 510 states and 710 transitions. Word has length 55 [2020-10-27 05:13:20,451 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:13:20,451 INFO L481 AbstractCegarLoop]: Abstraction has 510 states and 710 transitions. [2020-10-27 05:13:20,451 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-27 05:13:20,451 INFO L276 IsEmpty]: Start isEmpty. Operand 510 states and 710 transitions. [2020-10-27 05:13:20,452 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-10-27 05:13:20,452 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:13:20,452 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] [2020-10-27 05:13:20,452 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-27 05:13:20,452 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:13:20,453 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:13:20,453 INFO L82 PathProgramCache]: Analyzing trace with hash -295878213, now seen corresponding path program 1 times [2020-10-27 05:13:20,453 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:13:20,453 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [420924133] [2020-10-27 05:13:20,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:13:20,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:13:20,501 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:13:20,561 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:13:20,614 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:13:20,947 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:13:21,087 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:13:21,204 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:13:21,449 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:13:21,658 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:13:21,819 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:13:22,158 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:13:22,794 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:13:22,949 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:13:23,200 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:13:24,265 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:13:24,374 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:13:24,604 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:13:24,711 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:13:25,485 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:13:25,486 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 64 [2020-10-27 05:13:25,486 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 17 [2020-10-27 05:13:25,486 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-27 05:13:25,486 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:13:25,486 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-27 05:13:25,486 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 05:13:25,486 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 46 [2020-10-27 05:13:25,486 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:13:26,034 WARN L193 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 41 [2020-10-27 05:13:26,737 WARN L193 SmtUtils]: Spent 373.00 ms on a formula simplification that was a NOOP. DAG size: 211 [2020-10-27 05:13:26,739 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:13:26,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:13:26,747 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:13:26,756 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:13:26,756 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:13:26,757 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:13:26,757 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-10-27 05:13:26,757 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:13:26,757 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 05:13:26,757 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:13:26,757 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 05:13:26,757 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:13:26,778 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 05:13:26,779 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [420924133] [2020-10-27 05:13:26,779 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:13:26,779 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2020-10-27 05:13:26,779 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1668683165] [2020-10-27 05:13:26,780 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-27 05:13:26,780 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:13:26,781 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-27 05:13:26,781 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=198, Unknown=0, NotChecked=0, Total=240 [2020-10-27 05:13:26,781 INFO L87 Difference]: Start difference. First operand 510 states and 710 transitions. Second operand 16 states. [2020-10-27 05:13:27,835 WARN L193 SmtUtils]: Spent 878.00 ms on a formula simplification. DAG size of input: 226 DAG size of output: 224 [2020-10-27 05:13:28,148 WARN L193 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 42 [2020-10-27 05:13:28,359 WARN L193 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 48 [2020-10-27 05:13:30,114 WARN L193 SmtUtils]: Spent 371.00 ms on a formula simplification that was a NOOP. DAG size: 218 [2020-10-27 05:13:30,591 WARN L193 SmtUtils]: Spent 436.00 ms on a formula simplification that was a NOOP. DAG size: 225 [2020-10-27 05:13:31,068 WARN L193 SmtUtils]: Spent 377.00 ms on a formula simplification that was a NOOP. DAG size: 220 [2020-10-27 05:13:32,140 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:13:32,141 INFO L93 Difference]: Finished difference Result 1010 states and 1432 transitions. [2020-10-27 05:13:32,143 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-27 05:13:32,143 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 56 [2020-10-27 05:13:32,144 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:13:32,147 INFO L225 Difference]: With dead ends: 1010 [2020-10-27 05:13:32,148 INFO L226 Difference]: Without dead ends: 720 [2020-10-27 05:13:32,149 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 154 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=182, Invalid=748, Unknown=0, NotChecked=0, Total=930 [2020-10-27 05:13:32,150 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 720 states. [2020-10-27 05:13:32,237 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 720 to 509. [2020-10-27 05:13:32,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 509 states. [2020-10-27 05:13:32,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 509 states to 509 states and 708 transitions. [2020-10-27 05:13:32,240 INFO L78 Accepts]: Start accepts. Automaton has 509 states and 708 transitions. Word has length 56 [2020-10-27 05:13:32,240 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:13:32,240 INFO L481 AbstractCegarLoop]: Abstraction has 509 states and 708 transitions. [2020-10-27 05:13:32,240 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-27 05:13:32,240 INFO L276 IsEmpty]: Start isEmpty. Operand 509 states and 708 transitions. [2020-10-27 05:13:32,241 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-10-27 05:13:32,241 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:13:32,241 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] [2020-10-27 05:13:32,242 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-27 05:13:32,242 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:13:32,242 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:13:32,242 INFO L82 PathProgramCache]: Analyzing trace with hash 1178876852, now seen corresponding path program 1 times [2020-10-27 05:13:32,243 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:13:32,243 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1019294438] [2020-10-27 05:13:32,243 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:13:32,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:13:32,287 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:13:32,334 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:13:33,360 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:13:33,360 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 65 [2020-10-27 05:13:33,360 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 05:13:33,361 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1091 [2020-10-27 05:13:33,361 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:13:33,361 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 05:13:33,361 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 05:13:33,361 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 27 [2020-10-27 05:13:33,361 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:13:33,868 WARN L193 SmtUtils]: Spent 441.00 ms on a formula simplification that was a NOOP. DAG size: 211 [2020-10-27 05:13:33,869 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:13:33,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:13:33,885 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:13:33,909 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:13:33,909 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:13:33,909 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:13:33,909 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 29 [2020-10-27 05:13:33,910 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:13:33,910 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 05:13:33,910 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:13:33,910 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 05:13:33,910 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:13:33,929 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 05:13:33,929 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1019294438] [2020-10-27 05:13:33,930 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:13:33,930 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-27 05:13:33,930 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [650914764] [2020-10-27 05:13:33,931 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-27 05:13:33,931 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:13:33,931 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-27 05:13:33,932 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-27 05:13:33,932 INFO L87 Difference]: Start difference. First operand 509 states and 708 transitions. Second operand 6 states. [2020-10-27 05:13:34,380 WARN L193 SmtUtils]: Spent 394.00 ms on a formula simplification that was a NOOP. DAG size: 219 [2020-10-27 05:13:35,373 WARN L193 SmtUtils]: Spent 387.00 ms on a formula simplification that was a NOOP. DAG size: 217 [2020-10-27 05:13:35,781 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:13:35,781 INFO L93 Difference]: Finished difference Result 726 states and 1018 transitions. [2020-10-27 05:13:35,782 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-27 05:13:35,782 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 57 [2020-10-27 05:13:35,782 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:13:35,786 INFO L225 Difference]: With dead ends: 726 [2020-10-27 05:13:35,786 INFO L226 Difference]: Without dead ends: 473 [2020-10-27 05:13:35,787 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2020-10-27 05:13:35,788 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 473 states. [2020-10-27 05:13:35,868 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 473 to 450. [2020-10-27 05:13:35,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 450 states. [2020-10-27 05:13:35,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 450 states to 450 states and 621 transitions. [2020-10-27 05:13:35,870 INFO L78 Accepts]: Start accepts. Automaton has 450 states and 621 transitions. Word has length 57 [2020-10-27 05:13:35,871 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:13:35,871 INFO L481 AbstractCegarLoop]: Abstraction has 450 states and 621 transitions. [2020-10-27 05:13:35,871 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-27 05:13:35,871 INFO L276 IsEmpty]: Start isEmpty. Operand 450 states and 621 transitions. [2020-10-27 05:13:35,872 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-10-27 05:13:35,872 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:13:35,872 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] [2020-10-27 05:13:35,872 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-27 05:13:35,873 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:13:35,873 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:13:35,873 INFO L82 PathProgramCache]: Analyzing trace with hash 1471984872, now seen corresponding path program 1 times [2020-10-27 05:13:35,873 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:13:35,874 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [99781920] [2020-10-27 05:13:35,874 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:13:35,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:13:35,920 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:13:35,982 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:13:36,044 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:13:36,104 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:13:36,206 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:13:36,577 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:13:36,783 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:13:37,088 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:13:38,728 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:13:38,980 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:13:39,188 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:13:39,610 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:13:40,722 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:13:40,909 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:13:40,910 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 65 [2020-10-27 05:13:40,910 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 13 [2020-10-27 05:13:40,910 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5008 [2020-10-27 05:13:40,910 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:13:40,910 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-27 05:13:40,910 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 05:13:40,910 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 52 [2020-10-27 05:13:40,910 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:13:41,501 WARN L193 SmtUtils]: Spent 353.00 ms on a formula simplification that was a NOOP. DAG size: 211 [2020-10-27 05:13:41,502 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:13:41,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:13:41,519 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:13:41,539 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:13:41,539 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:13:41,539 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:13:41,539 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 25 [2020-10-27 05:13:41,540 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:13:41,540 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 05:13:41,540 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:13:41,540 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 05:13:41,541 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:13:41,571 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 05:13:41,576 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [99781920] [2020-10-27 05:13:41,576 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:13:41,577 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2020-10-27 05:13:41,577 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1302565992] [2020-10-27 05:13:41,577 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-27 05:13:41,577 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:13:41,578 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-27 05:13:41,579 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2020-10-27 05:13:41,579 INFO L87 Difference]: Start difference. First operand 450 states and 621 transitions. Second operand 13 states. [2020-10-27 05:13:42,678 WARN L193 SmtUtils]: Spent 949.00 ms on a formula simplification. DAG size of input: 241 DAG size of output: 238 [2020-10-27 05:13:44,933 WARN L193 SmtUtils]: Spent 837.00 ms on a formula simplification. DAG size of input: 224 DAG size of output: 222 [2020-10-27 05:13:45,363 WARN L193 SmtUtils]: Spent 386.00 ms on a formula simplification that was a NOOP. DAG size: 215 [2020-10-27 05:13:45,838 WARN L193 SmtUtils]: Spent 408.00 ms on a formula simplification that was a NOOP. DAG size: 219 [2020-10-27 05:13:47,212 WARN L193 SmtUtils]: Spent 389.00 ms on a formula simplification that was a NOOP. DAG size: 217 [2020-10-27 05:13:47,371 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:13:47,371 INFO L93 Difference]: Finished difference Result 1206 states and 1736 transitions. [2020-10-27 05:13:47,372 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-27 05:13:47,372 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 57 [2020-10-27 05:13:47,372 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:13:47,378 INFO L225 Difference]: With dead ends: 1206 [2020-10-27 05:13:47,378 INFO L226 Difference]: Without dead ends: 1199 [2020-10-27 05:13:47,380 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 197 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=203, Invalid=727, Unknown=0, NotChecked=0, Total=930 [2020-10-27 05:13:47,381 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1199 states. [2020-10-27 05:13:47,487 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1199 to 464. [2020-10-27 05:13:47,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 464 states. [2020-10-27 05:13:47,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 464 states to 464 states and 639 transitions. [2020-10-27 05:13:47,490 INFO L78 Accepts]: Start accepts. Automaton has 464 states and 639 transitions. Word has length 57 [2020-10-27 05:13:47,490 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:13:47,490 INFO L481 AbstractCegarLoop]: Abstraction has 464 states and 639 transitions. [2020-10-27 05:13:47,490 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-27 05:13:47,490 INFO L276 IsEmpty]: Start isEmpty. Operand 464 states and 639 transitions. [2020-10-27 05:13:47,491 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-10-27 05:13:47,492 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:13:47,492 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] [2020-10-27 05:13:47,492 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-27 05:13:47,492 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:13:47,493 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:13:47,493 INFO L82 PathProgramCache]: Analyzing trace with hash -598517054, now seen corresponding path program 1 times [2020-10-27 05:13:47,493 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:13:47,493 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1814439650] [2020-10-27 05:13:47,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:13:47,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:13:47,543 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:13:47,609 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:13:47,702 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:13:48,141 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:13:48,187 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:13:48,263 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:13:48,933 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:13:49,173 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:13:49,215 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:13:49,383 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:13:49,660 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:13:49,731 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:13:50,287 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:13:52,400 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:13:52,528 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:13:52,529 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 65 [2020-10-27 05:13:52,529 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 14 [2020-10-27 05:13:52,529 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5006 [2020-10-27 05:13:52,529 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:13:52,529 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-27 05:13:52,529 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 05:13:52,529 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 42 [2020-10-27 05:13:52,530 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:13:53,001 WARN L193 SmtUtils]: Spent 371.00 ms on a formula simplification that was a NOOP. DAG size: 211 [2020-10-27 05:13:53,002 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:13:53,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:13:53,015 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:13:53,029 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:13:53,029 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:13:53,029 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:13:53,029 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 17 [2020-10-27 05:13:53,029 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:13:53,029 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 05:13:53,029 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:13:53,029 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 05:13:53,030 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:13:53,046 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 05:13:53,046 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1814439650] [2020-10-27 05:13:53,047 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:13:53,047 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-10-27 05:13:53,047 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1609394116] [2020-10-27 05:13:53,047 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-27 05:13:53,047 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:13:53,048 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-27 05:13:53,048 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2020-10-27 05:13:53,048 INFO L87 Difference]: Start difference. First operand 464 states and 639 transitions. Second operand 9 states. [2020-10-27 05:13:53,538 WARN L193 SmtUtils]: Spent 416.00 ms on a formula simplification that was a NOOP. DAG size: 222 [2020-10-27 05:13:54,672 WARN L193 SmtUtils]: Spent 428.00 ms on a formula simplification that was a NOOP. DAG size: 220 [2020-10-27 05:13:55,110 WARN L193 SmtUtils]: Spent 391.00 ms on a formula simplification that was a NOOP. DAG size: 218 [2020-10-27 05:13:55,638 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:13:55,639 INFO L93 Difference]: Finished difference Result 954 states and 1350 transitions. [2020-10-27 05:13:55,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-27 05:13:55,639 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 57 [2020-10-27 05:13:55,640 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:13:55,643 INFO L225 Difference]: With dead ends: 954 [2020-10-27 05:13:55,644 INFO L226 Difference]: Without dead ends: 644 [2020-10-27 05:13:55,646 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=91, Invalid=215, Unknown=0, NotChecked=0, Total=306 [2020-10-27 05:13:55,648 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 644 states. [2020-10-27 05:13:55,779 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 644 to 537. [2020-10-27 05:13:55,780 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 537 states. [2020-10-27 05:13:55,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 537 states to 537 states and 746 transitions. [2020-10-27 05:13:55,782 INFO L78 Accepts]: Start accepts. Automaton has 537 states and 746 transitions. Word has length 57 [2020-10-27 05:13:55,782 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:13:55,782 INFO L481 AbstractCegarLoop]: Abstraction has 537 states and 746 transitions. [2020-10-27 05:13:55,782 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-27 05:13:55,782 INFO L276 IsEmpty]: Start isEmpty. Operand 537 states and 746 transitions. [2020-10-27 05:13:55,783 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-10-27 05:13:55,783 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:13:55,783 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] [2020-10-27 05:13:55,784 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-27 05:13:55,784 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:13:55,784 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:13:55,784 INFO L82 PathProgramCache]: Analyzing trace with hash -2091171779, now seen corresponding path program 1 times [2020-10-27 05:13:55,785 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:13:55,786 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2099802638] [2020-10-27 05:13:55,786 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:13:55,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:13:55,839 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:13:55,901 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:13:56,014 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:13:56,253 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:13:56,464 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:13:56,517 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:13:56,676 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:13:56,845 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:13:59,122 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:13:59,123 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 65 [2020-10-27 05:13:59,123 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-27 05:13:59,123 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3303 [2020-10-27 05:13:59,123 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:13:59,123 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-27 05:13:59,124 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 05:13:59,124 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 48 [2020-10-27 05:13:59,124 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:13:59,760 WARN L193 SmtUtils]: Spent 364.00 ms on a formula simplification that was a NOOP. DAG size: 211 [2020-10-27 05:13:59,761 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:13:59,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:13:59,769 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:13:59,775 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:13:59,775 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:13:59,776 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:13:59,776 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-27 05:13:59,776 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:13:59,776 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 05:13:59,776 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:13:59,776 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 05:13:59,777 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:13:59,800 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 05:13:59,800 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2099802638] [2020-10-27 05:13:59,800 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:13:59,800 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-10-27 05:13:59,800 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1950610500] [2020-10-27 05:13:59,801 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-27 05:13:59,801 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:13:59,801 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-27 05:13:59,802 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2020-10-27 05:13:59,802 INFO L87 Difference]: Start difference. First operand 537 states and 746 transitions. Second operand 9 states. [2020-10-27 05:14:00,893 WARN L193 SmtUtils]: Spent 917.00 ms on a formula simplification. DAG size of input: 240 DAG size of output: 240 [2020-10-27 05:14:02,944 WARN L193 SmtUtils]: Spent 867.00 ms on a formula simplification. DAG size of input: 238 DAG size of output: 238 [2020-10-27 05:14:03,627 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:14:03,627 INFO L93 Difference]: Finished difference Result 556 states and 763 transitions. [2020-10-27 05:14:03,628 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-27 05:14:03,628 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 57 [2020-10-27 05:14:03,629 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:14:03,631 INFO L225 Difference]: With dead ends: 556 [2020-10-27 05:14:03,631 INFO L226 Difference]: Without dead ends: 551 [2020-10-27 05:14:03,632 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=65, Invalid=175, Unknown=0, NotChecked=0, Total=240 [2020-10-27 05:14:03,633 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 551 states. [2020-10-27 05:14:03,757 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 551 to 534. [2020-10-27 05:14:03,757 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 534 states. [2020-10-27 05:14:03,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 534 states to 534 states and 742 transitions. [2020-10-27 05:14:03,760 INFO L78 Accepts]: Start accepts. Automaton has 534 states and 742 transitions. Word has length 57 [2020-10-27 05:14:03,760 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:14:03,760 INFO L481 AbstractCegarLoop]: Abstraction has 534 states and 742 transitions. [2020-10-27 05:14:03,760 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-27 05:14:03,760 INFO L276 IsEmpty]: Start isEmpty. Operand 534 states and 742 transitions. [2020-10-27 05:14:03,761 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-10-27 05:14:03,761 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:14:03,761 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] [2020-10-27 05:14:03,762 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-27 05:14:03,762 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:14:03,762 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:14:03,762 INFO L82 PathProgramCache]: Analyzing trace with hash 1797111268, now seen corresponding path program 1 times [2020-10-27 05:14:03,762 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:14:03,763 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1476475811] [2020-10-27 05:14:03,763 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:14:03,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:14:03,813 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:14:03,901 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:14:04,040 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:14:04,124 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:14:04,416 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:14:04,494 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:14:04,603 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:14:04,721 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:14:06,592 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:14:06,592 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 65 [2020-10-27 05:14:06,592 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-27 05:14:06,593 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2800 [2020-10-27 05:14:06,593 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:14:06,593 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-27 05:14:06,593 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 05:14:06,593 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 48 [2020-10-27 05:14:06,593 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:14:07,187 WARN L193 SmtUtils]: Spent 341.00 ms on a formula simplification that was a NOOP. DAG size: 211 [2020-10-27 05:14:07,188 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:14:07,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:14:07,195 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:14:07,202 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:14:07,202 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:14:07,202 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:14:07,202 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-27 05:14:07,202 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:14:07,202 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 05:14:07,202 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:14:07,202 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 05:14:07,202 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:14:07,221 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 05:14:07,221 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1476475811] [2020-10-27 05:14:07,221 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:14:07,221 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-10-27 05:14:07,222 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1350145193] [2020-10-27 05:14:07,222 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-27 05:14:07,222 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:14:07,223 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-27 05:14:07,223 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2020-10-27 05:14:07,223 INFO L87 Difference]: Start difference. First operand 534 states and 742 transitions. Second operand 9 states. [2020-10-27 05:14:07,689 WARN L193 SmtUtils]: Spent 406.00 ms on a formula simplification that was a NOOP. DAG size: 230 [2020-10-27 05:14:08,814 WARN L193 SmtUtils]: Spent 403.00 ms on a formula simplification that was a NOOP. DAG size: 228 [2020-10-27 05:14:09,232 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:14:09,232 INFO L93 Difference]: Finished difference Result 877 states and 1259 transitions. [2020-10-27 05:14:09,234 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-27 05:14:09,234 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 57 [2020-10-27 05:14:09,234 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:14:09,237 INFO L225 Difference]: With dead ends: 877 [2020-10-27 05:14:09,237 INFO L226 Difference]: Without dead ends: 545 [2020-10-27 05:14:09,238 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182 [2020-10-27 05:14:09,239 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 545 states. [2020-10-27 05:14:09,346 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 545 to 522. [2020-10-27 05:14:09,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 522 states. [2020-10-27 05:14:09,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 522 states to 522 states and 724 transitions. [2020-10-27 05:14:09,349 INFO L78 Accepts]: Start accepts. Automaton has 522 states and 724 transitions. Word has length 57 [2020-10-27 05:14:09,349 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:14:09,349 INFO L481 AbstractCegarLoop]: Abstraction has 522 states and 724 transitions. [2020-10-27 05:14:09,349 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-27 05:14:09,349 INFO L276 IsEmpty]: Start isEmpty. Operand 522 states and 724 transitions. [2020-10-27 05:14:09,350 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-10-27 05:14:09,350 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:14:09,350 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] [2020-10-27 05:14:09,350 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-27 05:14:09,350 INFO L429 AbstractCegarLoop]: === Iteration 14 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:14:09,351 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:14:09,351 INFO L82 PathProgramCache]: Analyzing trace with hash -2105554335, now seen corresponding path program 1 times [2020-10-27 05:14:09,351 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:14:09,351 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1095650240] [2020-10-27 05:14:09,351 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:14:09,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:14:09,396 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:14:09,455 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:14:09,491 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:14:09,747 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:14:09,944 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:14:10,150 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:14:10,336 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:14:11,221 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:14:12,465 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:14:12,465 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 65 [2020-10-27 05:14:12,466 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-27 05:14:12,466 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3088 [2020-10-27 05:14:12,466 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:14:12,466 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-27 05:14:12,466 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 05:14:12,466 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 38 [2020-10-27 05:14:12,466 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:14:13,062 WARN L193 SmtUtils]: Spent 367.00 ms on a formula simplification that was a NOOP. DAG size: 211 [2020-10-27 05:14:13,064 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:14:13,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:14:13,072 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:14:13,077 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:14:13,077 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:14:13,077 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:14:13,077 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-27 05:14:13,078 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:14:13,078 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 05:14:13,078 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:14:13,078 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 05:14:13,078 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:14:13,104 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 05:14:13,104 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1095650240] [2020-10-27 05:14:13,105 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:14:13,105 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-10-27 05:14:13,105 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1587097700] [2020-10-27 05:14:13,105 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-27 05:14:13,105 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:14:13,106 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-27 05:14:13,106 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2020-10-27 05:14:13,106 INFO L87 Difference]: Start difference. First operand 522 states and 724 transitions. Second operand 8 states. [2020-10-27 05:14:14,581 WARN L193 SmtUtils]: Spent 1.31 s on a formula simplification. DAG size of input: 238 DAG size of output: 230 [2020-10-27 05:14:15,378 WARN L193 SmtUtils]: Spent 380.00 ms on a formula simplification that was a NOOP. DAG size: 227 [2020-10-27 05:14:15,758 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:14:15,758 INFO L93 Difference]: Finished difference Result 535 states and 735 transitions. [2020-10-27 05:14:15,759 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-27 05:14:15,759 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 57 [2020-10-27 05:14:15,759 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:14:15,761 INFO L225 Difference]: With dead ends: 535 [2020-10-27 05:14:15,761 INFO L226 Difference]: Without dead ends: 504 [2020-10-27 05:14:15,762 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2020-10-27 05:14:15,763 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 504 states. [2020-10-27 05:14:15,875 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 504 to 493. [2020-10-27 05:14:15,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 493 states. [2020-10-27 05:14:15,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 493 states to 493 states and 689 transitions. [2020-10-27 05:14:15,877 INFO L78 Accepts]: Start accepts. Automaton has 493 states and 689 transitions. Word has length 57 [2020-10-27 05:14:15,878 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:14:15,878 INFO L481 AbstractCegarLoop]: Abstraction has 493 states and 689 transitions. [2020-10-27 05:14:15,878 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-27 05:14:15,878 INFO L276 IsEmpty]: Start isEmpty. Operand 493 states and 689 transitions. [2020-10-27 05:14:15,879 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2020-10-27 05:14:15,879 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:14:15,879 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] [2020-10-27 05:14:15,879 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-27 05:14:15,879 INFO L429 AbstractCegarLoop]: === Iteration 15 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:14:15,880 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:14:15,880 INFO L82 PathProgramCache]: Analyzing trace with hash 1558515235, now seen corresponding path program 1 times [2020-10-27 05:14:15,880 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:14:15,880 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [61859263] [2020-10-27 05:14:15,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:14:15,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:14:15,925 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:14:15,982 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:14:16,170 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:14:16,222 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:14:16,256 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:14:18,346 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:14:18,346 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 67 [2020-10-27 05:14:18,346 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-27 05:14:18,346 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2438 [2020-10-27 05:14:18,346 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:14:18,346 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-27 05:14:18,346 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 05:14:18,346 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 48 [2020-10-27 05:14:18,347 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:14:18,840 WARN L193 SmtUtils]: Spent 340.00 ms on a formula simplification that was a NOOP. DAG size: 211 [2020-10-27 05:14:18,841 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:14:18,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:14:18,857 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:14:18,879 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:14:18,879 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:14:18,879 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:14:18,879 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 26 [2020-10-27 05:14:18,879 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:14:18,879 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 05:14:18,880 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:14:18,880 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 05:14:18,880 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:14:18,915 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 05:14:18,915 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [61859263] [2020-10-27 05:14:18,915 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:14:18,916 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-10-27 05:14:18,916 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1909943850] [2020-10-27 05:14:18,916 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-27 05:14:18,916 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:14:18,917 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-27 05:14:18,917 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2020-10-27 05:14:18,917 INFO L87 Difference]: Start difference. First operand 493 states and 689 transitions. Second operand 11 states. [2020-10-27 05:14:19,407 WARN L193 SmtUtils]: Spent 414.00 ms on a formula simplification that was a NOOP. DAG size: 224 [2020-10-27 05:14:20,688 WARN L193 SmtUtils]: Spent 393.00 ms on a formula simplification that was a NOOP. DAG size: 216 [2020-10-27 05:14:21,176 WARN L193 SmtUtils]: Spent 412.00 ms on a formula simplification that was a NOOP. DAG size: 217 [2020-10-27 05:14:22,979 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:14:22,979 INFO L93 Difference]: Finished difference Result 1972 states and 2894 transitions. [2020-10-27 05:14:22,979 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-27 05:14:22,980 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 59 [2020-10-27 05:14:22,980 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:14:22,985 INFO L225 Difference]: With dead ends: 1972 [2020-10-27 05:14:22,986 INFO L226 Difference]: Without dead ends: 1618 [2020-10-27 05:14:22,987 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 196 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=200, Invalid=670, Unknown=0, NotChecked=0, Total=870 [2020-10-27 05:14:22,989 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1618 states. [2020-10-27 05:14:23,135 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1618 to 493. [2020-10-27 05:14:23,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 493 states. [2020-10-27 05:14:23,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 493 states to 493 states and 688 transitions. [2020-10-27 05:14:23,137 INFO L78 Accepts]: Start accepts. Automaton has 493 states and 688 transitions. Word has length 59 [2020-10-27 05:14:23,137 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:14:23,137 INFO L481 AbstractCegarLoop]: Abstraction has 493 states and 688 transitions. [2020-10-27 05:14:23,137 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-27 05:14:23,137 INFO L276 IsEmpty]: Start isEmpty. Operand 493 states and 688 transitions. [2020-10-27 05:14:23,138 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2020-10-27 05:14:23,138 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:14:23,138 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] [2020-10-27 05:14:23,138 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-27 05:14:23,139 INFO L429 AbstractCegarLoop]: === Iteration 16 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:14:23,139 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:14:23,139 INFO L82 PathProgramCache]: Analyzing trace with hash -511986691, now seen corresponding path program 1 times [2020-10-27 05:14:23,139 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:14:23,139 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1166508564] [2020-10-27 05:14:23,139 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:14:23,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:14:23,175 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:14:23,216 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:14:23,258 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:14:23,487 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:14:23,595 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:14:23,990 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:14:24,361 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:14:24,419 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:14:24,660 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:14:24,732 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:14:24,793 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:14:25,624 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:14:25,813 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:14:28,169 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:14:28,169 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 67 [2020-10-27 05:14:28,169 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 13 [2020-10-27 05:14:28,169 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5006 [2020-10-27 05:14:28,169 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:14:28,169 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-27 05:14:28,170 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 05:14:28,170 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 52 [2020-10-27 05:14:28,170 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:14:28,659 WARN L193 SmtUtils]: Spent 367.00 ms on a formula simplification that was a NOOP. DAG size: 211 [2020-10-27 05:14:28,660 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:14:28,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:14:28,675 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:14:28,693 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:14:28,693 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:14:28,693 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:14:28,693 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 22 [2020-10-27 05:14:28,693 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:14:28,693 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 05:14:28,694 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:14:28,694 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 05:14:28,694 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:14:28,714 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 05:14:28,714 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1166508564] [2020-10-27 05:14:28,715 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:14:28,715 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-10-27 05:14:28,715 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [573146179] [2020-10-27 05:14:28,715 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-27 05:14:28,715 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:14:28,716 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-27 05:14:28,716 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2020-10-27 05:14:28,716 INFO L87 Difference]: Start difference. First operand 493 states and 688 transitions. Second operand 10 states. [2020-10-27 05:14:29,206 WARN L193 SmtUtils]: Spent 421.00 ms on a formula simplification that was a NOOP. DAG size: 222 [2020-10-27 05:14:30,118 WARN L193 SmtUtils]: Spent 385.00 ms on a formula simplification that was a NOOP. DAG size: 218 [2020-10-27 05:14:30,500 WARN L193 SmtUtils]: Spent 354.00 ms on a formula simplification that was a NOOP. DAG size: 215 [2020-10-27 05:14:31,361 WARN L193 SmtUtils]: Spent 363.00 ms on a formula simplification that was a NOOP. DAG size: 217 [2020-10-27 05:14:31,443 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:14:31,443 INFO L93 Difference]: Finished difference Result 691 states and 973 transitions. [2020-10-27 05:14:31,443 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-27 05:14:31,444 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 59 [2020-10-27 05:14:31,444 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:14:31,447 INFO L225 Difference]: With dead ends: 691 [2020-10-27 05:14:31,447 INFO L226 Difference]: Without dead ends: 682 [2020-10-27 05:14:31,447 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 108 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=135, Invalid=371, Unknown=0, NotChecked=0, Total=506 [2020-10-27 05:14:31,448 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 682 states. [2020-10-27 05:14:31,582 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 682 to 493. [2020-10-27 05:14:31,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 493 states. [2020-10-27 05:14:31,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 493 states to 493 states and 687 transitions. [2020-10-27 05:14:31,584 INFO L78 Accepts]: Start accepts. Automaton has 493 states and 687 transitions. Word has length 59 [2020-10-27 05:14:31,585 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:14:31,585 INFO L481 AbstractCegarLoop]: Abstraction has 493 states and 687 transitions. [2020-10-27 05:14:31,585 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-27 05:14:31,585 INFO L276 IsEmpty]: Start isEmpty. Operand 493 states and 687 transitions. [2020-10-27 05:14:31,585 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2020-10-27 05:14:31,586 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:14:31,586 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] [2020-10-27 05:14:31,586 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-27 05:14:31,586 INFO L429 AbstractCegarLoop]: === Iteration 17 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:14:31,587 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:14:31,587 INFO L82 PathProgramCache]: Analyzing trace with hash 1682608766, now seen corresponding path program 1 times [2020-10-27 05:14:31,587 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:14:31,587 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2019110099] [2020-10-27 05:14:31,587 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:14:31,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:14:31,634 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:14:31,682 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:14:31,775 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:14:31,952 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:14:32,176 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:14:32,874 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:14:34,578 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:14:34,578 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 68 [2020-10-27 05:14:34,578 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-27 05:14:34,578 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2961 [2020-10-27 05:14:34,578 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:14:34,578 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-27 05:14:34,578 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 05:14:34,579 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 54 [2020-10-27 05:14:34,579 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:14:35,330 WARN L193 SmtUtils]: Spent 375.00 ms on a formula simplification that was a NOOP. DAG size: 211 [2020-10-27 05:14:35,331 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:14:35,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:14:35,344 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:14:35,356 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:14:35,356 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:14:35,356 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:14:35,357 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 15 [2020-10-27 05:14:35,357 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:14:35,357 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 05:14:35,357 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:14:35,357 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 05:14:35,357 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:14:35,383 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 05:14:35,383 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2019110099] [2020-10-27 05:14:35,383 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:14:35,384 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2020-10-27 05:14:35,384 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1919649775] [2020-10-27 05:14:35,384 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-27 05:14:35,384 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:14:35,385 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-27 05:14:35,385 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=220, Unknown=0, NotChecked=0, Total=272 [2020-10-27 05:14:35,385 INFO L87 Difference]: Start difference. First operand 493 states and 687 transitions. Second operand 17 states. [2020-10-27 05:14:36,600 WARN L193 SmtUtils]: Spent 1.04 s on a formula simplification. DAG size of input: 237 DAG size of output: 235 [2020-10-27 05:14:38,259 WARN L193 SmtUtils]: Spent 350.00 ms on a formula simplification that was a NOOP. DAG size: 215 [2020-10-27 05:14:38,740 WARN L193 SmtUtils]: Spent 397.00 ms on a formula simplification that was a NOOP. DAG size: 221 [2020-10-27 05:14:39,215 WARN L193 SmtUtils]: Spent 418.00 ms on a formula simplification that was a NOOP. DAG size: 222 [2020-10-27 05:14:40,544 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:14:40,545 INFO L93 Difference]: Finished difference Result 1380 states and 2013 transitions. [2020-10-27 05:14:40,545 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-27 05:14:40,545 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 60 [2020-10-27 05:14:40,545 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:14:40,549 INFO L225 Difference]: With dead ends: 1380 [2020-10-27 05:14:40,549 INFO L226 Difference]: Without dead ends: 1039 [2020-10-27 05:14:40,550 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 338 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=297, Invalid=1185, Unknown=0, NotChecked=0, Total=1482 [2020-10-27 05:14:40,551 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1039 states. [2020-10-27 05:14:40,666 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1039 to 498. [2020-10-27 05:14:40,666 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 498 states. [2020-10-27 05:14:40,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 498 states to 498 states and 693 transitions. [2020-10-27 05:14:40,668 INFO L78 Accepts]: Start accepts. Automaton has 498 states and 693 transitions. Word has length 60 [2020-10-27 05:14:40,668 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:14:40,668 INFO L481 AbstractCegarLoop]: Abstraction has 498 states and 693 transitions. [2020-10-27 05:14:40,668 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-27 05:14:40,668 INFO L276 IsEmpty]: Start isEmpty. Operand 498 states and 693 transitions. [2020-10-27 05:14:40,669 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-10-27 05:14:40,669 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:14:40,669 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] [2020-10-27 05:14:40,669 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-27 05:14:40,670 INFO L429 AbstractCegarLoop]: === Iteration 18 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:14:40,670 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:14:40,670 INFO L82 PathProgramCache]: Analyzing trace with hash -921854786, now seen corresponding path program 1 times [2020-10-27 05:14:40,670 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:14:40,670 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1401477267] [2020-10-27 05:14:40,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:14:40,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:14:40,715 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:14:40,795 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:14:40,903 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:14:41,285 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:14:41,826 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:14:41,826 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 69 [2020-10-27 05:14:41,827 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 05:14:41,827 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1129 [2020-10-27 05:14:41,827 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:14:41,827 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-27 05:14:41,827 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 05:14:41,827 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 50 [2020-10-27 05:14:41,827 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:14:42,474 WARN L193 SmtUtils]: Spent 387.00 ms on a formula simplification that was a NOOP. DAG size: 211 [2020-10-27 05:14:42,475 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:14:42,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:14:42,482 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:14:42,488 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:14:42,488 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:14:42,488 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:14:42,489 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-27 05:14:42,489 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:14:42,489 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 05:14:42,489 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:14:42,489 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 05:14:42,489 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:14:42,507 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 05:14:42,507 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1401477267] [2020-10-27 05:14:42,507 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:14:42,507 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-10-27 05:14:42,507 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1401602840] [2020-10-27 05:14:42,508 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-27 05:14:42,508 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:14:42,508 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-27 05:14:42,508 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2020-10-27 05:14:42,509 INFO L87 Difference]: Start difference. First operand 498 states and 693 transitions. Second operand 9 states. [2020-10-27 05:14:43,015 WARN L193 SmtUtils]: Spent 443.00 ms on a formula simplification that was a NOOP. DAG size: 232 [2020-10-27 05:14:44,037 WARN L193 SmtUtils]: Spent 441.00 ms on a formula simplification that was a NOOP. DAG size: 228 [2020-10-27 05:14:44,857 WARN L193 SmtUtils]: Spent 410.00 ms on a formula simplification that was a NOOP. DAG size: 229 [2020-10-27 05:14:44,868 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:14:44,868 INFO L93 Difference]: Finished difference Result 503 states and 696 transitions. [2020-10-27 05:14:44,870 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-27 05:14:44,870 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 61 [2020-10-27 05:14:44,871 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:14:44,874 INFO L225 Difference]: With dead ends: 503 [2020-10-27 05:14:44,874 INFO L226 Difference]: Without dead ends: 496 [2020-10-27 05:14:44,874 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=64, Invalid=208, Unknown=0, NotChecked=0, Total=272 [2020-10-27 05:14:44,875 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 496 states. [2020-10-27 05:14:44,981 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 496 to 493. [2020-10-27 05:14:44,981 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 493 states. [2020-10-27 05:14:44,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 493 states to 493 states and 684 transitions. [2020-10-27 05:14:44,983 INFO L78 Accepts]: Start accepts. Automaton has 493 states and 684 transitions. Word has length 61 [2020-10-27 05:14:44,983 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:14:44,983 INFO L481 AbstractCegarLoop]: Abstraction has 493 states and 684 transitions. [2020-10-27 05:14:44,983 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-27 05:14:44,983 INFO L276 IsEmpty]: Start isEmpty. Operand 493 states and 684 transitions. [2020-10-27 05:14:44,984 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-10-27 05:14:44,984 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:14:44,984 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] [2020-10-27 05:14:44,984 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-27 05:14:44,984 INFO L429 AbstractCegarLoop]: === Iteration 19 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:14:44,985 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:14:44,985 INFO L82 PathProgramCache]: Analyzing trace with hash -1623986088, now seen corresponding path program 1 times [2020-10-27 05:14:44,985 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:14:44,985 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [149982333] [2020-10-27 05:14:44,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:14:45,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:14:45,033 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:14:45,161 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:14:45,227 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:14:45,585 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:14:46,348 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:14:46,348 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 69 [2020-10-27 05:14:46,348 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 05:14:46,348 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1334 [2020-10-27 05:14:46,348 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:14:46,348 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-27 05:14:46,349 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 05:14:46,349 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 44 [2020-10-27 05:14:46,349 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:14:46,929 WARN L193 SmtUtils]: Spent 449.00 ms on a formula simplification that was a NOOP. DAG size: 211 [2020-10-27 05:14:46,930 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:14:46,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:14:46,937 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:14:46,945 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:14:46,945 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:14:46,945 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:14:46,945 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-27 05:14:46,945 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:14:46,946 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 05:14:46,946 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:14:46,946 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 05:14:46,946 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:14:46,965 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 05:14:46,965 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [149982333] [2020-10-27 05:14:46,965 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:14:46,965 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-10-27 05:14:46,966 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1119859372] [2020-10-27 05:14:46,966 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-27 05:14:46,966 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:14:46,967 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-27 05:14:46,967 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2020-10-27 05:14:46,967 INFO L87 Difference]: Start difference. First operand 493 states and 684 transitions. Second operand 9 states. [2020-10-27 05:14:47,406 WARN L193 SmtUtils]: Spent 388.00 ms on a formula simplification that was a NOOP. DAG size: 218 [2020-10-27 05:14:48,734 WARN L193 SmtUtils]: Spent 422.00 ms on a formula simplification that was a NOOP. DAG size: 220 [2020-10-27 05:14:49,170 WARN L193 SmtUtils]: Spent 400.00 ms on a formula simplification that was a NOOP. DAG size: 221 [2020-10-27 05:14:49,194 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:14:49,194 INFO L93 Difference]: Finished difference Result 662 states and 939 transitions. [2020-10-27 05:14:49,195 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-27 05:14:49,195 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 61 [2020-10-27 05:14:49,195 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:14:49,197 INFO L225 Difference]: With dead ends: 662 [2020-10-27 05:14:49,197 INFO L226 Difference]: Without dead ends: 648 [2020-10-27 05:14:49,198 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=72, Invalid=234, Unknown=0, NotChecked=0, Total=306 [2020-10-27 05:14:49,198 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 648 states. [2020-10-27 05:14:49,306 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 648 to 481. [2020-10-27 05:14:49,307 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 481 states. [2020-10-27 05:14:49,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 481 states to 481 states and 669 transitions. [2020-10-27 05:14:49,308 INFO L78 Accepts]: Start accepts. Automaton has 481 states and 669 transitions. Word has length 61 [2020-10-27 05:14:49,308 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:14:49,308 INFO L481 AbstractCegarLoop]: Abstraction has 481 states and 669 transitions. [2020-10-27 05:14:49,308 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-27 05:14:49,308 INFO L276 IsEmpty]: Start isEmpty. Operand 481 states and 669 transitions. [2020-10-27 05:14:49,309 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2020-10-27 05:14:49,309 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:14:49,309 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 05:14:49,310 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-27 05:14:49,310 INFO L429 AbstractCegarLoop]: === Iteration 20 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:14:49,310 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:14:49,310 INFO L82 PathProgramCache]: Analyzing trace with hash -1687306150, now seen corresponding path program 1 times [2020-10-27 05:14:49,310 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:14:49,310 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [796652385] [2020-10-27 05:14:49,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:14:49,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:14:49,346 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:14:49,370 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:14:49,392 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:14:49,416 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:14:49,476 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:14:49,597 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:14:49,695 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:14:49,739 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:14:49,840 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:14:53,281 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:14:53,301 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:14:53,334 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:14:54,339 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:14:54,339 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 87 [2020-10-27 05:14:54,339 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 12 [2020-10-27 05:14:54,339 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-10-27 05:14:54,340 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:14:54,340 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-27 05:14:54,340 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 05:14:54,340 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 49 [2020-10-27 05:14:54,340 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:14:54,789 WARN L193 SmtUtils]: Spent 340.00 ms on a formula simplification that was a NOOP. DAG size: 211 [2020-10-27 05:14:54,790 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:14:54,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:14:54,805 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:14:54,822 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:14:54,822 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:14:54,822 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:14:54,822 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 22 [2020-10-27 05:14:54,823 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:14:54,823 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 05:14:54,823 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:14:54,823 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 05:14:54,823 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:14:54,849 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 05:14:54,850 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [796652385] [2020-10-27 05:14:54,850 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:14:54,850 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-10-27 05:14:54,850 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1139346804] [2020-10-27 05:14:54,850 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-27 05:14:54,850 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:14:54,851 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-27 05:14:54,851 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2020-10-27 05:14:54,851 INFO L87 Difference]: Start difference. First operand 481 states and 669 transitions. Second operand 10 states. [2020-10-27 05:14:55,337 WARN L193 SmtUtils]: Spent 413.00 ms on a formula simplification that was a NOOP. DAG size: 224 [2020-10-27 05:14:57,107 WARN L193 SmtUtils]: Spent 406.00 ms on a formula simplification that was a NOOP. DAG size: 218 [2020-10-27 05:14:57,601 WARN L193 SmtUtils]: Spent 423.00 ms on a formula simplification that was a NOOP. DAG size: 220 [2020-10-27 05:14:57,623 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:14:57,624 INFO L93 Difference]: Finished difference Result 998 states and 1448 transitions. [2020-10-27 05:14:57,624 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-27 05:14:57,624 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 79 [2020-10-27 05:14:57,624 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:14:57,627 INFO L225 Difference]: With dead ends: 998 [2020-10-27 05:14:57,627 INFO L226 Difference]: Without dead ends: 651 [2020-10-27 05:14:57,628 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=148, Invalid=404, Unknown=0, NotChecked=0, Total=552 [2020-10-27 05:14:57,628 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 651 states. [2020-10-27 05:14:57,739 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 651 to 476. [2020-10-27 05:14:57,740 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 476 states. [2020-10-27 05:14:57,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 476 states to 476 states and 662 transitions. [2020-10-27 05:14:57,741 INFO L78 Accepts]: Start accepts. Automaton has 476 states and 662 transitions. Word has length 79 [2020-10-27 05:14:57,742 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:14:57,742 INFO L481 AbstractCegarLoop]: Abstraction has 476 states and 662 transitions. [2020-10-27 05:14:57,742 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-27 05:14:57,742 INFO L276 IsEmpty]: Start isEmpty. Operand 476 states and 662 transitions. [2020-10-27 05:14:57,743 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2020-10-27 05:14:57,743 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:14:57,743 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 05:14:57,744 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-10-27 05:14:57,744 INFO L429 AbstractCegarLoop]: === Iteration 21 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:14:57,744 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:14:57,744 INFO L82 PathProgramCache]: Analyzing trace with hash 1017122330, now seen corresponding path program 1 times [2020-10-27 05:14:57,744 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:14:57,745 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1070108069] [2020-10-27 05:14:57,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:14:57,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:14:57,777 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:14:57,801 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:14:57,822 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:14:57,844 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:14:57,886 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:14:57,979 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:14:58,112 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:14:58,983 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:14:59,003 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:14:59,033 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:15:00,409 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:15:00,460 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:15:02,775 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:15:02,775 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 88 [2020-10-27 05:15:02,775 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 12 [2020-10-27 05:15:02,776 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5009 [2020-10-27 05:15:02,776 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:15:02,776 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-27 05:15:02,776 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 05:15:02,776 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 54 [2020-10-27 05:15:02,776 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:15:03,238 WARN L193 SmtUtils]: Spent 343.00 ms on a formula simplification that was a NOOP. DAG size: 211 [2020-10-27 05:15:03,239 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:15:03,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:15:03,250 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:15:03,262 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:15:03,262 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:15:03,262 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:15:03,262 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 15 [2020-10-27 05:15:03,262 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:15:03,262 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 05:15:03,262 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:15:03,262 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 05:15:03,262 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:15:03,307 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 05:15:03,307 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1070108069] [2020-10-27 05:15:03,307 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:15:03,307 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-10-27 05:15:03,308 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [226978830] [2020-10-27 05:15:03,308 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-27 05:15:03,308 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:15:03,308 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-27 05:15:03,309 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2020-10-27 05:15:03,309 INFO L87 Difference]: Start difference. First operand 476 states and 662 transitions. Second operand 10 states. [2020-10-27 05:15:03,766 WARN L193 SmtUtils]: Spent 390.00 ms on a formula simplification that was a NOOP. DAG size: 222 [2020-10-27 05:15:05,397 WARN L193 SmtUtils]: Spent 351.00 ms on a formula simplification that was a NOOP. DAG size: 215 [2020-10-27 05:15:05,808 WARN L193 SmtUtils]: Spent 361.00 ms on a formula simplification that was a NOOP. DAG size: 217 [2020-10-27 05:15:06,236 WARN L193 SmtUtils]: Spent 375.00 ms on a formula simplification that was a NOOP. DAG size: 218 [2020-10-27 05:15:06,333 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:15:06,333 INFO L93 Difference]: Finished difference Result 1015 states and 1464 transitions. [2020-10-27 05:15:06,339 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-27 05:15:06,339 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 80 [2020-10-27 05:15:06,340 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:15:06,342 INFO L225 Difference]: With dead ends: 1015 [2020-10-27 05:15:06,343 INFO L226 Difference]: Without dead ends: 660 [2020-10-27 05:15:06,344 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 138 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=156, Invalid=494, Unknown=0, NotChecked=0, Total=650 [2020-10-27 05:15:06,346 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 660 states. [2020-10-27 05:15:06,477 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 660 to 476. [2020-10-27 05:15:06,477 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 476 states. [2020-10-27 05:15:06,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 476 states to 476 states and 658 transitions. [2020-10-27 05:15:06,478 INFO L78 Accepts]: Start accepts. Automaton has 476 states and 658 transitions. Word has length 80 [2020-10-27 05:15:06,478 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:15:06,479 INFO L481 AbstractCegarLoop]: Abstraction has 476 states and 658 transitions. [2020-10-27 05:15:06,479 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-27 05:15:06,479 INFO L276 IsEmpty]: Start isEmpty. Operand 476 states and 658 transitions. [2020-10-27 05:15:06,480 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2020-10-27 05:15:06,480 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:15:06,480 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 05:15:06,480 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-10-27 05:15:06,481 INFO L429 AbstractCegarLoop]: === Iteration 22 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:15:06,481 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:15:06,481 INFO L82 PathProgramCache]: Analyzing trace with hash 330061375, now seen corresponding path program 1 times [2020-10-27 05:15:06,481 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:15:06,481 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1153364227] [2020-10-27 05:15:06,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:15:06,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:15:06,519 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:15:06,541 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:15:06,576 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:15:06,679 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:15:07,666 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:15:07,687 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:15:07,707 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:15:07,763 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:15:07,903 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:15:07,949 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:15:11,515 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:15:11,516 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 90 [2020-10-27 05:15:11,516 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 10 [2020-10-27 05:15:11,516 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5008 [2020-10-27 05:15:11,516 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:15:11,516 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-27 05:15:11,516 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 05:15:11,516 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 49 [2020-10-27 05:15:11,516 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:15:11,931 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 30 [2020-10-27 05:15:12,618 WARN L193 SmtUtils]: Spent 362.00 ms on a formula simplification that was a NOOP. DAG size: 211 [2020-10-27 05:15:12,619 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:15:12,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:15:12,627 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:15:12,637 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:15:12,637 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:15:12,637 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:15:12,637 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-10-27 05:15:12,637 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:15:12,637 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 05:15:12,637 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:15:12,638 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 05:15:12,638 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:15:12,664 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 05:15:12,664 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1153364227] [2020-10-27 05:15:12,664 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:15:12,664 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2020-10-27 05:15:12,665 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [533512617] [2020-10-27 05:15:12,665 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-27 05:15:12,665 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:15:12,666 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-27 05:15:12,666 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2020-10-27 05:15:12,666 INFO L87 Difference]: Start difference. First operand 476 states and 658 transitions. Second operand 15 states. [2020-10-27 05:15:13,918 WARN L193 SmtUtils]: Spent 1.06 s on a formula simplification. DAG size of input: 253 DAG size of output: 250 [2020-10-27 05:15:17,455 WARN L193 SmtUtils]: Spent 416.00 ms on a formula simplification that was a NOOP. DAG size: 219 [2020-10-27 05:15:17,915 WARN L193 SmtUtils]: Spent 412.00 ms on a formula simplification that was a NOOP. DAG size: 220 [2020-10-27 05:15:18,447 WARN L193 SmtUtils]: Spent 402.00 ms on a formula simplification that was a NOOP. DAG size: 221 [2020-10-27 05:15:18,940 WARN L193 SmtUtils]: Spent 412.00 ms on a formula simplification that was a NOOP. DAG size: 223 [2020-10-27 05:15:19,009 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:15:19,009 INFO L93 Difference]: Finished difference Result 1061 states and 1552 transitions. [2020-10-27 05:15:19,011 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-27 05:15:19,011 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 82 [2020-10-27 05:15:19,012 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:15:19,016 INFO L225 Difference]: With dead ends: 1061 [2020-10-27 05:15:19,016 INFO L226 Difference]: Without dead ends: 969 [2020-10-27 05:15:19,017 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=134, Invalid=568, Unknown=0, NotChecked=0, Total=702 [2020-10-27 05:15:19,018 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 969 states. [2020-10-27 05:15:19,136 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 969 to 468. [2020-10-27 05:15:19,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 468 states. [2020-10-27 05:15:19,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 468 states to 468 states and 649 transitions. [2020-10-27 05:15:19,137 INFO L78 Accepts]: Start accepts. Automaton has 468 states and 649 transitions. Word has length 82 [2020-10-27 05:15:19,138 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:15:19,138 INFO L481 AbstractCegarLoop]: Abstraction has 468 states and 649 transitions. [2020-10-27 05:15:19,138 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-27 05:15:19,138 INFO L276 IsEmpty]: Start isEmpty. Operand 468 states and 649 transitions. [2020-10-27 05:15:19,139 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2020-10-27 05:15:19,139 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:15:19,139 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 05:15:19,139 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-10-27 05:15:19,140 INFO L429 AbstractCegarLoop]: === Iteration 23 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:15:19,140 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:15:19,140 INFO L82 PathProgramCache]: Analyzing trace with hash -825824515, now seen corresponding path program 1 times [2020-10-27 05:15:19,140 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:15:19,140 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [654380701] [2020-10-27 05:15:19,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:15:19,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:15:19,184 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:15:19,211 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:15:19,232 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:15:19,263 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:15:19,309 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:15:19,353 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:15:19,640 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:15:19,692 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:15:21,860 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:15:21,860 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 91 [2020-10-27 05:15:21,860 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-27 05:15:21,860 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2692 [2020-10-27 05:15:21,860 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:15:21,860 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 05:15:21,860 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-27 05:15:21,860 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 70 [2020-10-27 05:15:21,860 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:15:22,265 WARN L193 SmtUtils]: Spent 328.00 ms on a formula simplification that was a NOOP. DAG size: 211 [2020-10-27 05:15:22,266 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:15:22,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:15:22,273 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:15:22,279 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:15:22,279 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:15:22,279 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:15:22,279 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-27 05:15:22,279 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:15:22,279 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 05:15:22,279 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:15:22,280 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 05:15:22,280 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:15:22,297 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 05:15:22,297 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [654380701] [2020-10-27 05:15:22,297 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:15:22,297 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-27 05:15:22,297 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1464017205] [2020-10-27 05:15:22,298 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-27 05:15:22,298 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:15:22,298 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-27 05:15:22,298 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-27 05:15:22,299 INFO L87 Difference]: Start difference. First operand 468 states and 649 transitions. Second operand 6 states. [2020-10-27 05:15:22,731 WARN L193 SmtUtils]: Spent 380.00 ms on a formula simplification that was a NOOP. DAG size: 217 [2020-10-27 05:15:23,885 WARN L193 SmtUtils]: Spent 383.00 ms on a formula simplification that was a NOOP. DAG size: 213 [2020-10-27 05:15:24,325 WARN L193 SmtUtils]: Spent 395.00 ms on a formula simplification that was a NOOP. DAG size: 215 [2020-10-27 05:15:24,808 WARN L193 SmtUtils]: Spent 395.00 ms on a formula simplification that was a NOOP. DAG size: 215 [2020-10-27 05:15:25,230 WARN L193 SmtUtils]: Spent 398.00 ms on a formula simplification that was a NOOP. DAG size: 214 [2020-10-27 05:15:25,471 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:15:25,471 INFO L93 Difference]: Finished difference Result 2430 states and 3661 transitions. [2020-10-27 05:15:25,472 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-27 05:15:25,472 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 83 [2020-10-27 05:15:25,472 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:15:25,480 INFO L225 Difference]: With dead ends: 2430 [2020-10-27 05:15:25,481 INFO L226 Difference]: Without dead ends: 2103 [2020-10-27 05:15:25,482 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=60, Invalid=122, Unknown=0, NotChecked=0, Total=182 [2020-10-27 05:15:25,483 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2103 states. [2020-10-27 05:15:25,672 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2103 to 792. [2020-10-27 05:15:25,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 792 states. [2020-10-27 05:15:25,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 792 states to 792 states and 1133 transitions. [2020-10-27 05:15:25,674 INFO L78 Accepts]: Start accepts. Automaton has 792 states and 1133 transitions. Word has length 83 [2020-10-27 05:15:25,674 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:15:25,674 INFO L481 AbstractCegarLoop]: Abstraction has 792 states and 1133 transitions. [2020-10-27 05:15:25,674 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-27 05:15:25,675 INFO L276 IsEmpty]: Start isEmpty. Operand 792 states and 1133 transitions. [2020-10-27 05:15:25,676 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2020-10-27 05:15:25,676 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:15:25,676 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 05:15:25,676 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-10-27 05:15:25,676 INFO L429 AbstractCegarLoop]: === Iteration 24 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:15:25,676 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:15:25,676 INFO L82 PathProgramCache]: Analyzing trace with hash 2001954452, now seen corresponding path program 1 times [2020-10-27 05:15:25,676 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:15:25,677 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1119330903] [2020-10-27 05:15:25,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:15:25,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:15:25,710 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:15:25,732 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:15:25,754 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:15:25,802 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:15:25,971 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:15:26,008 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:15:26,196 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:15:26,406 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:15:26,433 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:15:26,474 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:15:26,511 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:15:26,976 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:15:30,699 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:15:30,699 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 93 [2020-10-27 05:15:30,699 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 12 [2020-10-27 05:15:30,699 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-27 05:15:30,699 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:15:30,699 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-27 05:15:30,699 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 05:15:30,699 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 74 [2020-10-27 05:15:30,699 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:15:31,212 WARN L193 SmtUtils]: Spent 347.00 ms on a formula simplification that was a NOOP. DAG size: 211 [2020-10-27 05:15:31,213 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:15:31,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:15:31,225 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:15:31,238 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:15:31,238 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:15:31,238 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:15:31,238 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 16 [2020-10-27 05:15:31,238 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:15:31,238 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 05:15:31,238 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:15:31,238 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 05:15:31,238 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:15:31,266 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 05:15:31,267 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1119330903] [2020-10-27 05:15:31,267 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:15:31,267 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-27 05:15:31,267 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1619710750] [2020-10-27 05:15:31,267 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-27 05:15:31,267 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:15:31,268 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-27 05:15:31,268 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-10-27 05:15:31,268 INFO L87 Difference]: Start difference. First operand 792 states and 1133 transitions. Second operand 8 states. [2020-10-27 05:15:31,697 WARN L193 SmtUtils]: Spent 380.00 ms on a formula simplification that was a NOOP. DAG size: 218 [2020-10-27 05:15:32,964 WARN L193 SmtUtils]: Spent 392.00 ms on a formula simplification that was a NOOP. DAG size: 222 [2020-10-27 05:15:33,390 WARN L193 SmtUtils]: Spent 376.00 ms on a formula simplification that was a NOOP. DAG size: 220 [2020-10-27 05:15:34,166 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:15:34,167 INFO L93 Difference]: Finished difference Result 3712 states and 5507 transitions. [2020-10-27 05:15:34,167 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-27 05:15:34,167 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 85 [2020-10-27 05:15:34,167 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:15:34,177 INFO L225 Difference]: With dead ends: 3712 [2020-10-27 05:15:34,177 INFO L226 Difference]: Without dead ends: 3061 [2020-10-27 05:15:34,179 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=91, Invalid=215, Unknown=0, NotChecked=0, Total=306 [2020-10-27 05:15:34,181 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3061 states. [2020-10-27 05:15:34,573 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3061 to 1520. [2020-10-27 05:15:34,573 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1520 states. [2020-10-27 05:15:34,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1520 states to 1520 states and 2213 transitions. [2020-10-27 05:15:34,577 INFO L78 Accepts]: Start accepts. Automaton has 1520 states and 2213 transitions. Word has length 85 [2020-10-27 05:15:34,577 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:15:34,577 INFO L481 AbstractCegarLoop]: Abstraction has 1520 states and 2213 transitions. [2020-10-27 05:15:34,577 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-27 05:15:34,577 INFO L276 IsEmpty]: Start isEmpty. Operand 1520 states and 2213 transitions. [2020-10-27 05:15:34,579 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2020-10-27 05:15:34,579 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:15:34,579 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 05:15:34,580 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-10-27 05:15:34,580 INFO L429 AbstractCegarLoop]: === Iteration 25 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:15:34,580 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:15:34,580 INFO L82 PathProgramCache]: Analyzing trace with hash 1771830157, now seen corresponding path program 1 times [2020-10-27 05:15:34,580 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:15:34,580 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1303270349] [2020-10-27 05:15:34,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:15:34,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:15:34,613 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:15:34,634 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:15:34,684 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:15:34,719 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:15:34,757 FATAL L256 erpolLogProxyWrapper]: Now shrinking...