/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=WIDESTAMONGSMALL --traceabstraction.additional.smt.options tolerance=0.6 --traceabstraction.additional.smt.options log-additional-information=true --traceabstraction.additional.smt.options unknown-allowed=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf language data_model -i ../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_lcr-var-start-time.3.2.ufo.BOUNDED-6.pals.c.v+nlh-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-28 18:51:54,598 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-28 18:51:54,604 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-28 18:51:54,662 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-28 18:51:54,663 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-28 18:51:54,670 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-28 18:51:54,673 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-28 18:51:54,677 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-28 18:51:54,681 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-28 18:51:54,687 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-28 18:51:54,688 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-28 18:51:54,690 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-28 18:51:54,691 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-28 18:51:54,694 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-28 18:51:54,697 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-28 18:51:54,700 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-28 18:51:54,701 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-28 18:51:54,705 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-28 18:51:54,712 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-28 18:51:54,720 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-28 18:51:54,722 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-28 18:51:54,724 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-28 18:51:54,726 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-28 18:51:54,728 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-28 18:51:54,737 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-28 18:51:54,737 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-28 18:51:54,752 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-28 18:51:54,753 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-28 18:51:54,754 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-28 18:51:54,758 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-28 18:51:54,758 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-28 18:51:54,759 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-28 18:51:54,760 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-28 18:51:54,761 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-28 18:51:54,763 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-28 18:51:54,763 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-28 18:51:54,764 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-28 18:51:54,764 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-28 18:51:54,764 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-28 18:51:54,765 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-28 18:51:54,766 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-28 18:51:54,767 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-28 18:51:54,794 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-28 18:51:54,795 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-28 18:51:54,796 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-28 18:51:54,796 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-28 18:51:54,797 INFO L138 SettingsManager]: * Use SBE=true [2020-10-28 18:51:54,797 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-28 18:51:54,797 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-28 18:51:54,797 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-28 18:51:54,798 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-28 18:51:54,798 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-28 18:51:54,798 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-28 18:51:54,798 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-28 18:51:54,799 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-28 18:51:54,799 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-28 18:51:54,799 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-28 18:51:54,799 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-28 18:51:54,799 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-28 18:51:54,800 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-28 18:51:54,800 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-28 18:51:54,800 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-28 18:51:54,800 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-28 18:51:54,801 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-28 18:51:54,801 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-28 18:51:54,801 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-28 18:51:54,801 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-28 18:51:54,801 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-28 18:51:54,802 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-28 18:51:54,802 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-28 18:51:54,802 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-28 18:51:54,802 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.6;log-additional-information=true;unknown-allowed=true; [2020-10-28 18:51:55,195 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-28 18:51:55,227 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-28 18:51:55,231 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-28 18:51:55,233 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-28 18:51:55,233 INFO L275 PluginConnector]: CDTParser initialized [2020-10-28 18:51:55,235 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_lcr-var-start-time.3.2.ufo.BOUNDED-6.pals.c.v+nlh-reducer.c [2020-10-28 18:51:55,327 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/7496969a9/45409e608f164046bb95b183c10f528a/FLAGe7b91fe44 [2020-10-28 18:51:56,045 INFO L306 CDTParser]: Found 1 translation units. [2020-10-28 18:51:56,048 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/seq-mthreaded-reduced/pals_lcr-var-start-time.3.2.ufo.BOUNDED-6.pals.c.v+nlh-reducer.c [2020-10-28 18:51:56,066 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/7496969a9/45409e608f164046bb95b183c10f528a/FLAGe7b91fe44 [2020-10-28 18:51:56,312 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/7496969a9/45409e608f164046bb95b183c10f528a [2020-10-28 18:51:56,317 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-28 18:51:56,323 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-28 18:51:56,325 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-28 18:51:56,325 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-28 18:51:56,329 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-28 18:51:56,330 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 06:51:56" (1/1) ... [2020-10-28 18:51:56,333 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@12bb571 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 06:51:56, skipping insertion in model container [2020-10-28 18:51:56,334 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 06:51:56" (1/1) ... [2020-10-28 18:51:56,342 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-28 18:51:56,382 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-28 18:51:56,703 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-28 18:51:56,717 INFO L203 MainTranslator]: Completed pre-run [2020-10-28 18:51:56,798 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-28 18:51:56,828 INFO L208 MainTranslator]: Completed translation [2020-10-28 18:51:56,829 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 06:51:56 WrapperNode [2020-10-28 18:51:56,829 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-28 18:51:56,830 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-28 18:51:56,830 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-28 18:51:56,831 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-28 18:51:56,844 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 06:51:56" (1/1) ... [2020-10-28 18:51:56,844 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 06:51:56" (1/1) ... [2020-10-28 18:51:56,857 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 06:51:56" (1/1) ... [2020-10-28 18:51:56,858 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 06:51:56" (1/1) ... [2020-10-28 18:51:56,875 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 06:51:56" (1/1) ... [2020-10-28 18:51:56,885 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 06:51:56" (1/1) ... [2020-10-28 18:51:56,890 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 06:51:56" (1/1) ... [2020-10-28 18:51:56,896 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-28 18:51:56,897 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-28 18:51:56,897 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-28 18:51:56,897 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-28 18:51:56,898 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 06:51:56" (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 [2020-10-28 18:51:56,991 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-28 18:51:56,992 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-28 18:51:56,992 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-28 18:51:56,992 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-10-28 18:51:56,993 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-28 18:51:56,993 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-28 18:51:56,994 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-28 18:51:56,994 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-28 18:51:56,994 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-28 18:51:56,994 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-10-28 18:51:56,995 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-10-28 18:51:56,995 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2020-10-28 18:51:56,995 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-10-28 18:51:56,996 INFO L130 BoogieDeclarations]: Found specification of procedure read [2020-10-28 18:51:56,996 INFO L130 BoogieDeclarations]: Found specification of procedure write [2020-10-28 18:51:56,997 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2020-10-28 18:51:56,997 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2020-10-28 18:51:56,998 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2020-10-28 18:51:56,998 INFO L130 BoogieDeclarations]: Found specification of procedure init [2020-10-28 18:51:56,998 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-10-28 18:51:56,998 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-28 18:51:56,998 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-28 18:51:56,998 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-28 18:51:56,998 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-28 18:51:56,998 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-28 18:51:56,999 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-28 18:51:56,999 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-28 18:51:58,130 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-28 18:51:58,130 INFO L298 CfgBuilder]: Removed 0 assume(true) statements. [2020-10-28 18:51:58,132 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 06:51:58 BoogieIcfgContainer [2020-10-28 18:51:58,133 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-28 18:51:58,134 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-28 18:51:58,135 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-28 18:51:58,138 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-28 18:51:58,139 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.10 06:51:56" (1/3) ... [2020-10-28 18:51:58,139 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@118c95c5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 06:51:58, skipping insertion in model container [2020-10-28 18:51:58,140 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 06:51:56" (2/3) ... [2020-10-28 18:51:58,140 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@118c95c5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 06:51:58, skipping insertion in model container [2020-10-28 18:51:58,140 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 06:51:58" (3/3) ... [2020-10-28 18:51:58,142 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_lcr-var-start-time.3.2.ufo.BOUNDED-6.pals.c.v+nlh-reducer.c [2020-10-28 18:51:58,154 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-28 18:51:58,159 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-28 18:51:58,173 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-28 18:51:58,202 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-28 18:51:58,202 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-28 18:51:58,202 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-28 18:51:58,202 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-28 18:51:58,202 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-28 18:51:58,203 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-28 18:51:58,203 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-28 18:51:58,203 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-28 18:51:58,229 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states. [2020-10-28 18:51:58,237 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-10-28 18:51:58,237 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 18:51:58,238 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 18:51:58,238 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 18:51:58,244 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 18:51:58,244 INFO L82 PathProgramCache]: Analyzing trace with hash -1354154435, now seen corresponding path program 1 times [2020-10-28 18:51:58,253 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 18:51:58,253 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [370753178] [2020-10-28 18:51:58,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 18:51:58,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:51:58,689 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:51:58,846 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:51:58,938 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:52:00,745 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:52:00,745 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 62 [2020-10-28 18:52:00,746 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 18:52:00,746 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2197 [2020-10-28 18:52:00,749 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:52:00,749 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:52:00,749 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 18:52:00,750 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 42 [2020-10-28 18:52:00,750 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-28 18:52:00,751 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-10-28 18:52:01,085 WARN L193 SmtUtils]: Spent 199.00 ms on a formula simplification that was a NOOP. DAG size: 142 [2020-10-28 18:52:01,088 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 18:52:01,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:52:01,109 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:52:01,133 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:52:01,133 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 18:52:01,134 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 18:52:01,134 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 26 [2020-10-28 18:52:01,134 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:52:01,134 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:52:01,134 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 18:52:01,135 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 18:52:01,135 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 18:52:01,135 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 18:52:01,162 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 18:52:01,163 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [370753178] [2020-10-28 18:52:01,165 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 18:52:01,166 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 18:52:01,167 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1342564420] [2020-10-28 18:52:01,174 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 18:52:01,175 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 18:52:01,193 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 18:52:01,194 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 18:52:01,196 INFO L87 Difference]: Start difference. First operand 157 states. Second operand 4 states. [2020-10-28 18:52:01,435 WARN L193 SmtUtils]: Spent 166.00 ms on a formula simplification that was a NOOP. DAG size: 145 [2020-10-28 18:52:02,232 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 18:52:02,232 INFO L93 Difference]: Finished difference Result 299 states and 480 transitions. [2020-10-28 18:52:02,233 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 18:52:02,234 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 54 [2020-10-28 18:52:02,235 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 18:52:02,248 INFO L225 Difference]: With dead ends: 299 [2020-10-28 18:52:02,248 INFO L226 Difference]: Without dead ends: 224 [2020-10-28 18:52:02,256 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-28 18:52:02,280 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 224 states. [2020-10-28 18:52:02,361 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 224 to 221. [2020-10-28 18:52:02,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 221 states. [2020-10-28 18:52:02,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 221 states to 221 states and 324 transitions. [2020-10-28 18:52:02,374 INFO L78 Accepts]: Start accepts. Automaton has 221 states and 324 transitions. Word has length 54 [2020-10-28 18:52:02,375 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 18:52:02,375 INFO L481 AbstractCegarLoop]: Abstraction has 221 states and 324 transitions. [2020-10-28 18:52:02,376 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 18:52:02,376 INFO L276 IsEmpty]: Start isEmpty. Operand 221 states and 324 transitions. [2020-10-28 18:52:02,379 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-10-28 18:52:02,380 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 18:52:02,381 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 18:52:02,381 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-28 18:52:02,381 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 18:52:02,382 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 18:52:02,382 INFO L82 PathProgramCache]: Analyzing trace with hash -604795160, now seen corresponding path program 1 times [2020-10-28 18:52:02,382 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 18:52:02,383 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [781884918] [2020-10-28 18:52:02,383 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 18:52:02,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:52:02,475 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:52:02,533 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:52:02,587 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:52:02,788 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:52:02,960 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:52:07,463 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:52:07,464 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 65 [2020-10-28 18:52:07,464 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-28 18:52:07,464 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5011 [2020-10-28 18:52:07,465 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:52:07,465 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:52:07,466 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 18:52:07,466 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 32 [2020-10-28 18:52:07,466 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-10-28 18:52:07,467 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 18:52:07,737 WARN L193 SmtUtils]: Spent 184.00 ms on a formula simplification that was a NOOP. DAG size: 142 [2020-10-28 18:52:07,738 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 18:52:07,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:52:07,748 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:52:07,758 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:52:07,758 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 18:52:07,758 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 18:52:07,759 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12 [2020-10-28 18:52:07,759 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:52:07,759 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:52:07,759 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 18:52:07,759 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 18:52:07,759 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 18:52:07,760 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:52:07,775 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 18:52:07,776 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [781884918] [2020-10-28 18:52:07,776 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 18:52:07,776 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 18:52:07,776 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [358921833] [2020-10-28 18:52:07,778 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 18:52:07,778 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 18:52:07,779 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 18:52:07,779 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 18:52:07,779 INFO L87 Difference]: Start difference. First operand 221 states and 324 transitions. Second operand 4 states. [2020-10-28 18:52:07,977 WARN L193 SmtUtils]: Spent 170.00 ms on a formula simplification that was a NOOP. DAG size: 146 [2020-10-28 18:52:08,584 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 18:52:08,584 INFO L93 Difference]: Finished difference Result 547 states and 824 transitions. [2020-10-28 18:52:08,585 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 18:52:08,585 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 57 [2020-10-28 18:52:08,585 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 18:52:08,588 INFO L225 Difference]: With dead ends: 547 [2020-10-28 18:52:08,589 INFO L226 Difference]: Without dead ends: 384 [2020-10-28 18:52:08,591 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-28 18:52:08,592 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 384 states. [2020-10-28 18:52:08,622 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 384 to 381. [2020-10-28 18:52:08,622 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 381 states. [2020-10-28 18:52:08,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 381 states to 381 states and 561 transitions. [2020-10-28 18:52:08,624 INFO L78 Accepts]: Start accepts. Automaton has 381 states and 561 transitions. Word has length 57 [2020-10-28 18:52:08,625 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 18:52:08,625 INFO L481 AbstractCegarLoop]: Abstraction has 381 states and 561 transitions. [2020-10-28 18:52:08,625 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 18:52:08,625 INFO L276 IsEmpty]: Start isEmpty. Operand 381 states and 561 transitions. [2020-10-28 18:52:08,627 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-10-28 18:52:08,628 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 18:52:08,629 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 18:52:08,629 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-28 18:52:08,629 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 18:52:08,630 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 18:52:08,630 INFO L82 PathProgramCache]: Analyzing trace with hash -1612176600, now seen corresponding path program 1 times [2020-10-28 18:52:08,630 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 18:52:08,631 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1477385685] [2020-10-28 18:52:08,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 18:52:08,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:52:08,684 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:52:08,741 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:52:08,886 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:52:09,069 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:52:09,111 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:52:13,678 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:52:13,679 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 65 [2020-10-28 18:52:13,679 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-28 18:52:13,679 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5012 [2020-10-28 18:52:13,679 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:52:13,680 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:52:13,680 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 18:52:13,680 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 39 [2020-10-28 18:52:13,680 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-28 18:52:13,680 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:52:13,886 WARN L193 SmtUtils]: Spent 141.00 ms on a formula simplification that was a NOOP. DAG size: 142 [2020-10-28 18:52:13,889 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 18:52:13,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:52:13,900 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:52:13,911 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:52:13,911 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 18:52:13,912 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 18:52:13,912 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 13 [2020-10-28 18:52:13,912 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:52:13,912 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:52:13,912 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 18:52:13,912 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 18:52:13,913 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 18:52:13,913 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:52:13,927 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 18:52:13,928 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1477385685] [2020-10-28 18:52:13,928 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 18:52:13,928 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 18:52:13,929 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2067817114] [2020-10-28 18:52:13,930 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 18:52:13,930 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 18:52:13,932 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 18:52:13,932 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 18:52:13,932 INFO L87 Difference]: Start difference. First operand 381 states and 561 transitions. Second operand 4 states. [2020-10-28 18:52:14,112 WARN L193 SmtUtils]: Spent 151.00 ms on a formula simplification that was a NOOP. DAG size: 146 [2020-10-28 18:52:14,701 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 18:52:14,701 INFO L93 Difference]: Finished difference Result 899 states and 1342 transitions. [2020-10-28 18:52:14,702 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 18:52:14,702 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 57 [2020-10-28 18:52:14,702 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 18:52:14,706 INFO L225 Difference]: With dead ends: 899 [2020-10-28 18:52:14,706 INFO L226 Difference]: Without dead ends: 640 [2020-10-28 18:52:14,708 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-28 18:52:14,710 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 640 states. [2020-10-28 18:52:14,750 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 640 to 637. [2020-10-28 18:52:14,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 637 states. [2020-10-28 18:52:14,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 637 states to 637 states and 932 transitions. [2020-10-28 18:52:14,755 INFO L78 Accepts]: Start accepts. Automaton has 637 states and 932 transitions. Word has length 57 [2020-10-28 18:52:14,755 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 18:52:14,755 INFO L481 AbstractCegarLoop]: Abstraction has 637 states and 932 transitions. [2020-10-28 18:52:14,756 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 18:52:14,756 INFO L276 IsEmpty]: Start isEmpty. Operand 637 states and 932 transitions. [2020-10-28 18:52:14,759 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-10-28 18:52:14,759 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 18:52:14,759 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 18:52:14,759 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-28 18:52:14,759 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 18:52:14,760 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 18:52:14,760 INFO L82 PathProgramCache]: Analyzing trace with hash 1880238250, now seen corresponding path program 1 times [2020-10-28 18:52:14,760 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 18:52:14,761 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [273272008] [2020-10-28 18:52:14,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 18:52:14,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:52:14,820 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:52:14,848 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:52:14,881 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:52:15,035 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:52:15,589 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:52:19,789 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:52:19,794 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 65 [2020-10-28 18:52:19,794 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-28 18:52:19,794 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4999 [2020-10-28 18:52:19,795 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:52:19,795 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:52:19,795 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 18:52:19,795 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 35 [2020-10-28 18:52:19,795 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-10-28 18:52:19,795 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:52:19,985 WARN L193 SmtUtils]: Spent 132.00 ms on a formula simplification that was a NOOP. DAG size: 142 [2020-10-28 18:52:19,986 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 18:52:19,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:52:19,993 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:52:20,003 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:52:20,004 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 18:52:20,004 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 18:52:20,004 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12 [2020-10-28 18:52:20,004 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:52:20,004 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:52:20,004 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 18:52:20,005 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 18:52:20,005 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 18:52:20,005 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:52:20,019 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 18:52:20,020 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [273272008] [2020-10-28 18:52:20,020 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 18:52:20,020 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 18:52:20,020 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1736553070] [2020-10-28 18:52:20,021 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 18:52:20,021 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 18:52:20,021 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 18:52:20,022 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 18:52:20,022 INFO L87 Difference]: Start difference. First operand 637 states and 932 transitions. Second operand 4 states. [2020-10-28 18:52:20,188 WARN L193 SmtUtils]: Spent 139.00 ms on a formula simplification that was a NOOP. DAG size: 146 [2020-10-28 18:52:20,829 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 18:52:20,829 INFO L93 Difference]: Finished difference Result 1619 states and 2380 transitions. [2020-10-28 18:52:20,832 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 18:52:20,832 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 57 [2020-10-28 18:52:20,833 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 18:52:20,841 INFO L225 Difference]: With dead ends: 1619 [2020-10-28 18:52:20,842 INFO L226 Difference]: Without dead ends: 1112 [2020-10-28 18:52:20,845 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-28 18:52:20,846 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1112 states. [2020-10-28 18:52:20,908 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1112 to 1109. [2020-10-28 18:52:20,909 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1109 states. [2020-10-28 18:52:20,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1109 states to 1109 states and 1594 transitions. [2020-10-28 18:52:20,915 INFO L78 Accepts]: Start accepts. Automaton has 1109 states and 1594 transitions. Word has length 57 [2020-10-28 18:52:20,933 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 18:52:20,933 INFO L481 AbstractCegarLoop]: Abstraction has 1109 states and 1594 transitions. [2020-10-28 18:52:20,933 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 18:52:20,933 INFO L276 IsEmpty]: Start isEmpty. Operand 1109 states and 1594 transitions. [2020-10-28 18:52:20,938 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-10-28 18:52:20,938 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 18:52:20,938 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 18:52:20,938 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-28 18:52:20,939 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 18:52:20,939 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 18:52:20,939 INFO L82 PathProgramCache]: Analyzing trace with hash -1166450857, now seen corresponding path program 1 times [2020-10-28 18:52:20,940 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 18:52:20,940 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2112361114] [2020-10-28 18:52:20,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 18:52:20,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:52:21,006 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:52:21,058 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:52:21,110 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:52:21,232 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:52:21,592 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:52:24,792 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:52:24,792 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 66 [2020-10-28 18:52:24,792 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-28 18:52:24,792 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3812 [2020-10-28 18:52:24,793 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:52:24,793 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:52:24,793 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-28 18:52:24,793 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-28 18:52:24,793 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 50 [2020-10-28 18:52:24,794 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 18:52:25,164 WARN L193 SmtUtils]: Spent 143.00 ms on a formula simplification that was a NOOP. DAG size: 142 [2020-10-28 18:52:25,166 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 18:52:25,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:52:25,184 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:52:25,207 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:52:25,208 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 18:52:25,208 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 18:52:25,208 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 28 [2020-10-28 18:52:25,208 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:52:25,208 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:52:25,208 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 18:52:25,209 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 18:52:25,209 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-28 18:52:25,209 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:52:25,238 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 18:52:25,238 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2112361114] [2020-10-28 18:52:25,238 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 18:52:25,239 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-28 18:52:25,239 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1128982070] [2020-10-28 18:52:25,241 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-28 18:52:25,241 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 18:52:25,241 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-28 18:52:25,242 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-10-28 18:52:25,242 INFO L87 Difference]: Start difference. First operand 1109 states and 1594 transitions. Second operand 8 states. [2020-10-28 18:52:25,448 WARN L193 SmtUtils]: Spent 164.00 ms on a formula simplification that was a NOOP. DAG size: 149 [2020-10-28 18:52:26,146 WARN L193 SmtUtils]: Spent 174.00 ms on a formula simplification that was a NOOP. DAG size: 153 [2020-10-28 18:52:26,967 WARN L193 SmtUtils]: Spent 161.00 ms on a formula simplification that was a NOOP. DAG size: 151 [2020-10-28 18:52:27,150 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 18:52:27,151 INFO L93 Difference]: Finished difference Result 4645 states and 6776 transitions. [2020-10-28 18:52:27,151 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-28 18:52:27,151 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 58 [2020-10-28 18:52:27,152 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 18:52:27,173 INFO L225 Difference]: With dead ends: 4645 [2020-10-28 18:52:27,174 INFO L226 Difference]: Without dead ends: 3862 [2020-10-28 18:52:27,178 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=91, Invalid=215, Unknown=0, NotChecked=0, Total=306 [2020-10-28 18:52:27,183 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3862 states. [2020-10-28 18:52:27,302 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3862 to 1121. [2020-10-28 18:52:27,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1121 states. [2020-10-28 18:52:27,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1121 states to 1121 states and 1594 transitions. [2020-10-28 18:52:27,309 INFO L78 Accepts]: Start accepts. Automaton has 1121 states and 1594 transitions. Word has length 58 [2020-10-28 18:52:27,309 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 18:52:27,309 INFO L481 AbstractCegarLoop]: Abstraction has 1121 states and 1594 transitions. [2020-10-28 18:52:27,309 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-28 18:52:27,309 INFO L276 IsEmpty]: Start isEmpty. Operand 1121 states and 1594 transitions. [2020-10-28 18:52:27,312 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-10-28 18:52:27,312 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 18:52:27,312 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 18:52:27,312 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-28 18:52:27,312 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 18:52:27,313 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 18:52:27,313 INFO L82 PathProgramCache]: Analyzing trace with hash -73117020, now seen corresponding path program 1 times [2020-10-28 18:52:27,313 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 18:52:27,314 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1408254044] [2020-10-28 18:52:27,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 18:52:27,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:52:27,375 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:52:27,402 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:52:27,428 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:52:27,792 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:52:27,908 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:52:30,768 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:52:30,768 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 66 [2020-10-28 18:52:30,769 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-28 18:52:30,769 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3408 [2020-10-28 18:52:30,769 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:52:30,769 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:52:30,769 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-28 18:52:30,769 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-28 18:52:30,770 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 53 [2020-10-28 18:52:30,770 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:52:31,055 WARN L193 SmtUtils]: Spent 129.00 ms on a formula simplification that was a NOOP. DAG size: 142 [2020-10-28 18:52:31,056 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 18:52:31,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:52:31,071 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:52:31,085 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:52:31,085 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 18:52:31,085 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 18:52:31,086 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 17 [2020-10-28 18:52:31,086 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:52:31,086 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:52:31,086 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 18:52:31,086 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 18:52:31,086 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-28 18:52:31,087 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:52:31,113 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 18:52:31,113 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1408254044] [2020-10-28 18:52:31,115 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 18:52:31,115 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-28 18:52:31,115 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1950101606] [2020-10-28 18:52:31,116 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-28 18:52:31,116 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 18:52:31,116 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-28 18:52:31,118 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-10-28 18:52:31,118 INFO L87 Difference]: Start difference. First operand 1121 states and 1594 transitions. Second operand 8 states. [2020-10-28 18:52:31,295 WARN L193 SmtUtils]: Spent 144.00 ms on a formula simplification that was a NOOP. DAG size: 149 [2020-10-28 18:52:31,973 WARN L193 SmtUtils]: Spent 150.00 ms on a formula simplification that was a NOOP. DAG size: 153 [2020-10-28 18:52:32,714 WARN L193 SmtUtils]: Spent 164.00 ms on a formula simplification that was a NOOP. DAG size: 151 [2020-10-28 18:52:32,955 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 18:52:32,955 INFO L93 Difference]: Finished difference Result 4783 states and 6892 transitions. [2020-10-28 18:52:32,955 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-28 18:52:32,956 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 58 [2020-10-28 18:52:32,956 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 18:52:32,977 INFO L225 Difference]: With dead ends: 4783 [2020-10-28 18:52:32,978 INFO L226 Difference]: Without dead ends: 4026 [2020-10-28 18:52:32,981 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=91, Invalid=215, Unknown=0, NotChecked=0, Total=306 [2020-10-28 18:52:32,987 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4026 states. [2020-10-28 18:52:33,126 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4026 to 1225. [2020-10-28 18:52:33,127 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1225 states. [2020-10-28 18:52:33,132 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1225 states to 1225 states and 1706 transitions. [2020-10-28 18:52:33,133 INFO L78 Accepts]: Start accepts. Automaton has 1225 states and 1706 transitions. Word has length 58 [2020-10-28 18:52:33,133 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 18:52:33,133 INFO L481 AbstractCegarLoop]: Abstraction has 1225 states and 1706 transitions. [2020-10-28 18:52:33,133 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-28 18:52:33,134 INFO L276 IsEmpty]: Start isEmpty. Operand 1225 states and 1706 transitions. [2020-10-28 18:52:33,135 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2020-10-28 18:52:33,135 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 18:52:33,135 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 18:52:33,136 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-28 18:52:33,136 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 18:52:33,136 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 18:52:33,136 INFO L82 PathProgramCache]: Analyzing trace with hash -31198825, now seen corresponding path program 1 times [2020-10-28 18:52:33,137 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 18:52:33,137 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1033384762] [2020-10-28 18:52:33,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 18:52:33,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:52:33,174 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:52:33,199 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:52:33,230 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:52:33,266 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:52:33,850 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:52:33,954 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:52:34,059 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:52:34,121 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:52:34,313 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:52:34,582 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:52:34,709 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:52:34,752 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:52:38,161 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:52:38,161 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 67 [2020-10-28 18:52:38,161 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 12 [2020-10-28 18:52:38,162 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-28 18:52:38,162 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:52:38,162 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:52:38,162 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 18:52:38,162 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-28 18:52:38,162 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 46 [2020-10-28 18:52:38,162 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:52:38,370 WARN L193 SmtUtils]: Spent 155.00 ms on a formula simplification that was a NOOP. DAG size: 142 [2020-10-28 18:52:38,371 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 18:52:38,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:52:38,378 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:52:38,390 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:52:38,391 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 18:52:38,391 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 18:52:38,391 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 13 [2020-10-28 18:52:38,391 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:52:38,392 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:52:38,392 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 18:52:38,392 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 18:52:38,392 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 18:52:38,393 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 18:52:38,416 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 18:52:38,416 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1033384762] [2020-10-28 18:52:38,417 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 18:52:38,417 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-28 18:52:38,417 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1131488218] [2020-10-28 18:52:38,418 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-28 18:52:38,418 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 18:52:38,419 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-28 18:52:38,419 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-28 18:52:38,419 INFO L87 Difference]: Start difference. First operand 1225 states and 1706 transitions. Second operand 6 states. [2020-10-28 18:52:38,664 WARN L193 SmtUtils]: Spent 192.00 ms on a formula simplification that was a NOOP. DAG size: 149 [2020-10-28 18:52:39,156 WARN L193 SmtUtils]: Spent 125.00 ms on a formula simplification that was a NOOP. DAG size: 144 [2020-10-28 18:52:39,785 WARN L193 SmtUtils]: Spent 137.00 ms on a formula simplification that was a NOOP. DAG size: 147 [2020-10-28 18:52:39,951 WARN L193 SmtUtils]: Spent 140.00 ms on a formula simplification that was a NOOP. DAG size: 145 [2020-10-28 18:52:40,009 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 18:52:40,009 INFO L93 Difference]: Finished difference Result 3088 states and 4388 transitions. [2020-10-28 18:52:40,010 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-28 18:52:40,010 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 59 [2020-10-28 18:52:40,011 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 18:52:40,022 INFO L225 Difference]: With dead ends: 3088 [2020-10-28 18:52:40,022 INFO L226 Difference]: Without dead ends: 2413 [2020-10-28 18:52:40,025 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=52, Invalid=104, Unknown=0, NotChecked=0, Total=156 [2020-10-28 18:52:40,050 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2413 states. [2020-10-28 18:52:40,187 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2413 to 1442. [2020-10-28 18:52:40,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1442 states. [2020-10-28 18:52:40,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1442 states to 1442 states and 2022 transitions. [2020-10-28 18:52:40,193 INFO L78 Accepts]: Start accepts. Automaton has 1442 states and 2022 transitions. Word has length 59 [2020-10-28 18:52:40,194 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 18:52:40,194 INFO L481 AbstractCegarLoop]: Abstraction has 1442 states and 2022 transitions. [2020-10-28 18:52:40,194 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-28 18:52:40,194 INFO L276 IsEmpty]: Start isEmpty. Operand 1442 states and 2022 transitions. [2020-10-28 18:52:40,196 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2020-10-28 18:52:40,196 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 18:52:40,196 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 18:52:40,196 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-28 18:52:40,196 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 18:52:40,197 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 18:52:40,197 INFO L82 PathProgramCache]: Analyzing trace with hash -1705879036, now seen corresponding path program 1 times [2020-10-28 18:52:40,197 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 18:52:40,197 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1980640235] [2020-10-28 18:52:40,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 18:52:40,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:52:40,233 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:52:40,259 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:52:40,285 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:52:40,345 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:52:40,635 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:52:42,982 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:52:42,982 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 67 [2020-10-28 18:52:42,982 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-28 18:52:42,982 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2762 [2020-10-28 18:52:42,983 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:52:42,983 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:52:42,983 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-28 18:52:42,983 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-28 18:52:42,983 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 48 [2020-10-28 18:52:42,983 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:52:43,254 WARN L193 SmtUtils]: Spent 131.00 ms on a formula simplification that was a NOOP. DAG size: 142 [2020-10-28 18:52:43,255 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 18:52:43,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:52:43,270 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:52:43,287 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:52:43,287 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 18:52:43,287 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 18:52:43,287 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 21 [2020-10-28 18:52:43,288 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:52:43,288 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:52:43,288 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 18:52:43,288 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 18:52:43,288 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-28 18:52:43,288 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:52:43,312 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 18:52:43,313 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1980640235] [2020-10-28 18:52:43,313 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 18:52:43,313 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-28 18:52:43,313 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1731599777] [2020-10-28 18:52:43,314 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-28 18:52:43,314 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 18:52:43,316 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-28 18:52:43,318 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-10-28 18:52:43,318 INFO L87 Difference]: Start difference. First operand 1442 states and 2022 transitions. Second operand 8 states. [2020-10-28 18:52:43,492 WARN L193 SmtUtils]: Spent 137.00 ms on a formula simplification that was a NOOP. DAG size: 149 [2020-10-28 18:52:44,098 WARN L193 SmtUtils]: Spent 149.00 ms on a formula simplification that was a NOOP. DAG size: 153 [2020-10-28 18:52:44,803 WARN L193 SmtUtils]: Spent 153.00 ms on a formula simplification that was a NOOP. DAG size: 151 [2020-10-28 18:52:45,074 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 18:52:45,074 INFO L93 Difference]: Finished difference Result 5257 states and 7430 transitions. [2020-10-28 18:52:45,074 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-28 18:52:45,074 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 59 [2020-10-28 18:52:45,075 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 18:52:45,096 INFO L225 Difference]: With dead ends: 5257 [2020-10-28 18:52:45,096 INFO L226 Difference]: Without dead ends: 4238 [2020-10-28 18:52:45,100 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=91, Invalid=215, Unknown=0, NotChecked=0, Total=306 [2020-10-28 18:52:45,106 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4238 states. [2020-10-28 18:52:45,288 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4238 to 1484. [2020-10-28 18:52:45,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1484 states. [2020-10-28 18:52:45,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1484 states to 1484 states and 2044 transitions. [2020-10-28 18:52:45,296 INFO L78 Accepts]: Start accepts. Automaton has 1484 states and 2044 transitions. Word has length 59 [2020-10-28 18:52:45,296 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 18:52:45,296 INFO L481 AbstractCegarLoop]: Abstraction has 1484 states and 2044 transitions. [2020-10-28 18:52:45,296 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-28 18:52:45,296 INFO L276 IsEmpty]: Start isEmpty. Operand 1484 states and 2044 transitions. [2020-10-28 18:52:45,298 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2020-10-28 18:52:45,298 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 18:52:45,298 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] [2020-10-28 18:52:45,298 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-28 18:52:45,299 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 18:52:45,299 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 18:52:45,299 INFO L82 PathProgramCache]: Analyzing trace with hash -940312645, now seen corresponding path program 1 times [2020-10-28 18:52:45,299 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 18:52:45,300 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [186085538] [2020-10-28 18:52:45,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 18:52:45,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:52:45,339 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:52:45,365 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:52:45,396 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:52:45,513 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:52:45,587 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:52:45,648 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:52:46,532 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:52:46,675 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:52:46,957 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:52:47,046 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:52:47,147 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:52:48,006 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:52:50,335 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:52:50,336 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 68 [2020-10-28 18:52:50,336 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 12 [2020-10-28 18:52:50,337 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5010 [2020-10-28 18:52:50,337 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:52:50,338 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:52:50,338 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 18:52:50,338 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-28 18:52:50,338 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 47 [2020-10-28 18:52:50,339 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 18:52:50,566 WARN L193 SmtUtils]: Spent 152.00 ms on a formula simplification that was a NOOP. DAG size: 142 [2020-10-28 18:52:50,567 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 18:52:50,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:52:50,575 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:52:50,581 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:52:50,581 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 18:52:50,581 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 18:52:50,582 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-28 18:52:50,582 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:52:50,582 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:52:50,582 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 18:52:50,582 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 18:52:50,582 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 18:52:50,583 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:52:50,597 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 18:52:50,597 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [186085538] [2020-10-28 18:52:50,597 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 18:52:50,597 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-28 18:52:50,598 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2001148235] [2020-10-28 18:52:50,598 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-28 18:52:50,598 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 18:52:50,599 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-28 18:52:50,599 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-28 18:52:50,599 INFO L87 Difference]: Start difference. First operand 1484 states and 2044 transitions. Second operand 6 states. [2020-10-28 18:52:50,787 WARN L193 SmtUtils]: Spent 149.00 ms on a formula simplification that was a NOOP. DAG size: 149 [2020-10-28 18:52:51,468 WARN L193 SmtUtils]: Spent 147.00 ms on a formula simplification that was a NOOP. DAG size: 144 [2020-10-28 18:52:52,059 WARN L193 SmtUtils]: Spent 159.00 ms on a formula simplification that was a NOOP. DAG size: 147 [2020-10-28 18:52:52,233 WARN L193 SmtUtils]: Spent 142.00 ms on a formula simplification that was a NOOP. DAG size: 145 [2020-10-28 18:52:52,309 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 18:52:52,309 INFO L93 Difference]: Finished difference Result 3596 states and 5038 transitions. [2020-10-28 18:52:52,309 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-28 18:52:52,310 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 60 [2020-10-28 18:52:52,310 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 18:52:52,322 INFO L225 Difference]: With dead ends: 3596 [2020-10-28 18:52:52,323 INFO L226 Difference]: Without dead ends: 2921 [2020-10-28 18:52:52,325 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=52, Invalid=104, Unknown=0, NotChecked=0, Total=156 [2020-10-28 18:52:52,329 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2921 states. [2020-10-28 18:52:52,542 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2921 to 1825. [2020-10-28 18:52:52,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1825 states. [2020-10-28 18:52:52,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1825 states to 1825 states and 2535 transitions. [2020-10-28 18:52:52,550 INFO L78 Accepts]: Start accepts. Automaton has 1825 states and 2535 transitions. Word has length 60 [2020-10-28 18:52:52,550 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 18:52:52,550 INFO L481 AbstractCegarLoop]: Abstraction has 1825 states and 2535 transitions. [2020-10-28 18:52:52,550 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-28 18:52:52,550 INFO L276 IsEmpty]: Start isEmpty. Operand 1825 states and 2535 transitions. [2020-10-28 18:52:52,552 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2020-10-28 18:52:52,552 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 18:52:52,552 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] [2020-10-28 18:52:52,553 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-28 18:52:52,553 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 18:52:52,553 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 18:52:52,553 INFO L82 PathProgramCache]: Analyzing trace with hash 1160402632, now seen corresponding path program 1 times [2020-10-28 18:52:52,554 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 18:52:52,554 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [262154324] [2020-10-28 18:52:52,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 18:52:52,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:52:52,587 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:52:52,613 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:52:52,640 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:52:52,721 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:52:52,812 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:52:52,873 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:52:53,004 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:52:53,099 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:52:53,137 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:52:53,164 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:52:55,422 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:52:55,521 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:52:57,580 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:52:57,580 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 68 [2020-10-28 18:52:57,580 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 12 [2020-10-28 18:52:57,581 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-10-28 18:52:57,581 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:52:57,581 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:52:57,581 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 18:52:57,581 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-10-28 18:52:57,581 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 43 [2020-10-28 18:52:57,581 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:52:57,755 WARN L193 SmtUtils]: Spent 133.00 ms on a formula simplification that was a NOOP. DAG size: 142 [2020-10-28 18:52:57,756 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 18:52:57,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:52:57,765 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:52:57,771 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:52:57,771 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 18:52:57,772 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 18:52:57,772 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-28 18:52:57,772 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:52:57,772 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:52:57,772 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 18:52:57,772 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 18:52:57,773 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 18:52:57,773 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:52:57,788 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 18:52:57,788 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [262154324] [2020-10-28 18:52:57,788 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 18:52:57,789 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-28 18:52:57,789 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [878755448] [2020-10-28 18:52:57,789 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-28 18:52:57,789 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 18:52:57,790 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-28 18:52:57,790 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-28 18:52:57,790 INFO L87 Difference]: Start difference. First operand 1825 states and 2535 transitions. Second operand 6 states. [2020-10-28 18:52:57,985 WARN L193 SmtUtils]: Spent 154.00 ms on a formula simplification that was a NOOP. DAG size: 149 [2020-10-28 18:52:58,586 WARN L193 SmtUtils]: Spent 150.00 ms on a formula simplification that was a NOOP. DAG size: 144 [2020-10-28 18:52:59,099 WARN L193 SmtUtils]: Spent 143.00 ms on a formula simplification that was a NOOP. DAG size: 145 [2020-10-28 18:52:59,311 WARN L193 SmtUtils]: Spent 190.00 ms on a formula simplification that was a NOOP. DAG size: 147 [2020-10-28 18:52:59,456 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 18:52:59,456 INFO L93 Difference]: Finished difference Result 4060 states and 5690 transitions. [2020-10-28 18:52:59,456 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-28 18:52:59,456 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 60 [2020-10-28 18:52:59,457 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 18:52:59,470 INFO L225 Difference]: With dead ends: 4060 [2020-10-28 18:52:59,470 INFO L226 Difference]: Without dead ends: 3385 [2020-10-28 18:52:59,472 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=52, Invalid=104, Unknown=0, NotChecked=0, Total=156 [2020-10-28 18:52:59,476 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3385 states. [2020-10-28 18:52:59,812 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3385 to 2186. [2020-10-28 18:52:59,812 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2186 states. [2020-10-28 18:52:59,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2186 states to 2186 states and 3059 transitions. [2020-10-28 18:52:59,819 INFO L78 Accepts]: Start accepts. Automaton has 2186 states and 3059 transitions. Word has length 60 [2020-10-28 18:52:59,819 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 18:52:59,819 INFO L481 AbstractCegarLoop]: Abstraction has 2186 states and 3059 transitions. [2020-10-28 18:52:59,820 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-28 18:52:59,820 INFO L276 IsEmpty]: Start isEmpty. Operand 2186 states and 3059 transitions. [2020-10-28 18:52:59,822 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2020-10-28 18:52:59,823 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 18:52:59,823 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 18:52:59,823 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-28 18:52:59,823 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 18:52:59,825 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 18:52:59,825 INFO L82 PathProgramCache]: Analyzing trace with hash -1789576142, now seen corresponding path program 1 times [2020-10-28 18:52:59,825 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 18:52:59,825 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [459449633] [2020-10-28 18:52:59,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 18:52:59,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:52:59,866 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:52:59,903 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:52:59,927 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:52:59,993 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:53:00,022 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:53:00,268 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:53:00,577 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:53:00,655 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:53:01,011 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:53:01,930 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:53:01,993 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:53:04,434 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:53:04,463 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:53:04,533 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:53:04,833 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:53:04,855 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:53:04,855 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 72 [2020-10-28 18:53:04,855 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 15 [2020-10-28 18:53:04,855 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-10-28 18:53:04,855 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:53:04,856 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:53:04,856 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 18:53:04,856 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 24 [2020-10-28 18:53:04,856 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 40 [2020-10-28 18:53:04,856 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:53:05,040 WARN L193 SmtUtils]: Spent 142.00 ms on a formula simplification that was a NOOP. DAG size: 142 [2020-10-28 18:53:05,041 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 18:53:05,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:53:05,049 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:53:05,055 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:53:05,055 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 18:53:05,055 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 18:53:05,055 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-28 18:53:05,056 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:53:05,056 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:53:05,056 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 18:53:05,056 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 18:53:05,056 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 18:53:05,056 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:53:05,070 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 18:53:05,070 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [459449633] [2020-10-28 18:53:05,071 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 18:53:05,071 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-28 18:53:05,071 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1055670303] [2020-10-28 18:53:05,071 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-28 18:53:05,072 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 18:53:05,072 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-28 18:53:05,072 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-28 18:53:05,072 INFO L87 Difference]: Start difference. First operand 2186 states and 3059 transitions. Second operand 6 states. [2020-10-28 18:53:05,247 WARN L193 SmtUtils]: Spent 132.00 ms on a formula simplification that was a NOOP. DAG size: 143 [2020-10-28 18:53:06,196 WARN L193 SmtUtils]: Spent 150.00 ms on a formula simplification that was a NOOP. DAG size: 144 [2020-10-28 18:53:06,462 WARN L193 SmtUtils]: Spent 144.00 ms on a formula simplification that was a NOOP. DAG size: 143 [2020-10-28 18:53:08,165 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 18:53:08,166 INFO L93 Difference]: Finished difference Result 14396 states and 20616 transitions. [2020-10-28 18:53:08,166 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-28 18:53:08,166 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 64 [2020-10-28 18:53:08,167 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 18:53:08,207 INFO L225 Difference]: With dead ends: 14396 [2020-10-28 18:53:08,207 INFO L226 Difference]: Without dead ends: 12626 [2020-10-28 18:53:08,215 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2020-10-28 18:53:08,229 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12626 states. [2020-10-28 18:53:09,209 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12626 to 6895. [2020-10-28 18:53:09,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6895 states. [2020-10-28 18:53:09,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6895 states to 6895 states and 9781 transitions. [2020-10-28 18:53:09,226 INFO L78 Accepts]: Start accepts. Automaton has 6895 states and 9781 transitions. Word has length 64 [2020-10-28 18:53:09,227 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 18:53:09,227 INFO L481 AbstractCegarLoop]: Abstraction has 6895 states and 9781 transitions. [2020-10-28 18:53:09,227 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-28 18:53:09,227 INFO L276 IsEmpty]: Start isEmpty. Operand 6895 states and 9781 transitions. [2020-10-28 18:53:09,231 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2020-10-28 18:53:09,231 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 18:53:09,231 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 18:53:09,232 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-28 18:53:09,232 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 18:53:09,232 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 18:53:09,232 INFO L82 PathProgramCache]: Analyzing trace with hash 1702838708, now seen corresponding path program 1 times [2020-10-28 18:53:09,232 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 18:53:09,233 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2132145718] [2020-10-28 18:53:09,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 18:53:09,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:53:09,267 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:53:09,299 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:53:09,321 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:53:09,366 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:53:09,390 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:53:09,767 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:53:10,016 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:53:10,090 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:53:10,234 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:53:10,428 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:53:14,256 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:53:14,256 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 72 [2020-10-28 18:53:14,256 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 10 [2020-10-28 18:53:14,256 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-28 18:53:14,256 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:53:14,256 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:53:14,256 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 18:53:14,256 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-10-28 18:53:14,257 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 39 [2020-10-28 18:53:14,257 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:53:14,437 WARN L193 SmtUtils]: Spent 141.00 ms on a formula simplification that was a NOOP. DAG size: 142 [2020-10-28 18:53:14,438 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 18:53:14,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:53:14,447 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:53:14,452 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:53:14,452 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 18:53:14,452 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 18:53:14,452 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-28 18:53:14,453 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:53:14,453 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:53:14,453 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 18:53:14,453 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 18:53:14,453 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 18:53:14,453 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:53:14,465 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 18:53:14,465 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2132145718] [2020-10-28 18:53:14,466 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 18:53:14,466 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-28 18:53:14,466 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1127563643] [2020-10-28 18:53:14,467 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-28 18:53:14,467 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 18:53:14,467 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-28 18:53:14,467 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-28 18:53:14,468 INFO L87 Difference]: Start difference. First operand 6895 states and 9781 transitions. Second operand 6 states. [2020-10-28 18:53:14,670 WARN L193 SmtUtils]: Spent 158.00 ms on a formula simplification that was a NOOP. DAG size: 143 [2020-10-28 18:53:15,999 WARN L193 SmtUtils]: Spent 156.00 ms on a formula simplification that was a NOOP. DAG size: 144 [2020-10-28 18:53:16,309 WARN L193 SmtUtils]: Spent 142.00 ms on a formula simplification that was a NOOP. DAG size: 143 [2020-10-28 18:53:21,222 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 18:53:21,222 INFO L93 Difference]: Finished difference Result 53284 states and 76594 transitions. [2020-10-28 18:53:21,223 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-28 18:53:21,223 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 64 [2020-10-28 18:53:21,223 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 18:53:21,364 INFO L225 Difference]: With dead ends: 53284 [2020-10-28 18:53:21,365 INFO L226 Difference]: Without dead ends: 47373 [2020-10-28 18:53:21,397 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2020-10-28 18:53:21,455 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47373 states. [2020-10-28 18:53:24,215 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47373 to 18422. [2020-10-28 18:53:24,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18422 states. [2020-10-28 18:53:24,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18422 states to 18422 states and 26528 transitions. [2020-10-28 18:53:24,254 INFO L78 Accepts]: Start accepts. Automaton has 18422 states and 26528 transitions. Word has length 64 [2020-10-28 18:53:24,255 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 18:53:24,255 INFO L481 AbstractCegarLoop]: Abstraction has 18422 states and 26528 transitions. [2020-10-28 18:53:24,255 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-28 18:53:24,255 INFO L276 IsEmpty]: Start isEmpty. Operand 18422 states and 26528 transitions. [2020-10-28 18:53:24,262 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-10-28 18:53:24,262 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 18:53:24,263 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 18:53:24,263 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-28 18:53:24,263 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 18:53:24,263 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 18:53:24,264 INFO L82 PathProgramCache]: Analyzing trace with hash 1308265109, now seen corresponding path program 1 times [2020-10-28 18:53:24,264 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 18:53:24,264 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1778383249] [2020-10-28 18:53:24,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 18:53:24,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:53:24,300 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:53:24,327 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:53:24,354 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:53:24,389 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:53:24,436 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:53:24,527 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:53:25,035 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:53:25,092 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:53:25,164 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:53:26,226 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:53:28,384 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:53:28,458 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:53:28,582 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:53:29,293 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:53:29,293 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 73 [2020-10-28 18:53:29,293 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 13 [2020-10-28 18:53:29,293 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5006 [2020-10-28 18:53:29,294 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:53:29,294 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:53:29,294 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 18:53:29,294 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-28 18:53:29,294 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 34 [2020-10-28 18:53:29,294 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:53:29,496 WARN L193 SmtUtils]: Spent 158.00 ms on a formula simplification that was a NOOP. DAG size: 142 [2020-10-28 18:53:29,497 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 18:53:29,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:53:29,510 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:53:29,525 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:53:29,525 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 18:53:29,525 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 18:53:29,526 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 18 [2020-10-28 18:53:29,526 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:53:29,526 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:53:29,526 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 18:53:29,526 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 18:53:29,526 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-28 18:53:29,526 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:53:29,540 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 18:53:29,541 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1778383249] [2020-10-28 18:53:29,541 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 18:53:29,541 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-28 18:53:29,541 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [582747429] [2020-10-28 18:53:29,542 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-28 18:53:29,542 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 18:53:29,543 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-28 18:53:29,543 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-28 18:53:29,543 INFO L87 Difference]: Start difference. First operand 18422 states and 26528 transitions. Second operand 6 states. [2020-10-28 18:53:29,742 WARN L193 SmtUtils]: Spent 155.00 ms on a formula simplification that was a NOOP. DAG size: 150 [2020-10-28 18:53:30,809 WARN L193 SmtUtils]: Spent 148.00 ms on a formula simplification that was a NOOP. DAG size: 148 [2020-10-28 18:53:34,234 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 18:53:34,234 INFO L93 Difference]: Finished difference Result 52878 states and 76683 transitions. [2020-10-28 18:53:34,235 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-28 18:53:34,235 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 65 [2020-10-28 18:53:34,235 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 18:53:34,328 INFO L225 Difference]: With dead ends: 52878 [2020-10-28 18:53:34,329 INFO L226 Difference]: Without dead ends: 34722 [2020-10-28 18:53:34,369 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2020-10-28 18:53:34,401 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34722 states. [2020-10-28 18:53:38,185 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34722 to 34571. [2020-10-28 18:53:38,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34571 states. [2020-10-28 18:53:38,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34571 states to 34571 states and 49959 transitions. [2020-10-28 18:53:38,238 INFO L78 Accepts]: Start accepts. Automaton has 34571 states and 49959 transitions. Word has length 65 [2020-10-28 18:53:38,238 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 18:53:38,238 INFO L481 AbstractCegarLoop]: Abstraction has 34571 states and 49959 transitions. [2020-10-28 18:53:38,239 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-28 18:53:38,239 INFO L276 IsEmpty]: Start isEmpty. Operand 34571 states and 49959 transitions. [2020-10-28 18:53:38,249 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-10-28 18:53:38,249 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 18:53:38,249 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 18:53:38,249 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-28 18:53:38,250 INFO L429 AbstractCegarLoop]: === Iteration 14 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 18:53:38,250 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 18:53:38,250 INFO L82 PathProgramCache]: Analyzing trace with hash -614426763, now seen corresponding path program 1 times [2020-10-28 18:53:38,250 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 18:53:38,251 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1628151792] [2020-10-28 18:53:38,251 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 18:53:38,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:53:38,286 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:53:38,321 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:53:38,369 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:53:38,622 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:53:38,875 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:53:38,986 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:53:39,197 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:53:40,015 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:53:40,055 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:53:40,108 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:53:40,946 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:53:41,033 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:53:41,102 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:53:41,144 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:53:41,219 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:53:41,353 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:53:41,520 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:53:41,592 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:53:42,530 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:53:42,565 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:53:43,274 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:53:43,274 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 74 [2020-10-28 18:53:43,275 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 20 [2020-10-28 18:53:43,275 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-28 18:53:43,275 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:53:43,275 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:53:43,275 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 18:53:43,275 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-28 18:53:43,275 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 29 [2020-10-28 18:53:43,275 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:53:43,473 WARN L193 SmtUtils]: Spent 148.00 ms on a formula simplification that was a NOOP. DAG size: 142 [2020-10-28 18:53:43,474 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 18:53:43,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:53:43,486 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:53:43,497 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:53:43,497 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 18:53:43,497 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 18:53:43,497 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 14 [2020-10-28 18:53:43,497 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:53:43,498 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:53:43,498 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 18:53:43,498 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 18:53:43,498 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-28 18:53:43,498 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:53:43,522 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 18:53:43,522 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1628151792] [2020-10-28 18:53:43,522 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 18:53:43,523 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-28 18:53:43,523 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1518263741] [2020-10-28 18:53:43,523 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-28 18:53:43,523 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 18:53:43,524 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-28 18:53:43,524 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-10-28 18:53:43,524 INFO L87 Difference]: Start difference. First operand 34571 states and 49959 transitions. Second operand 6 states. [2020-10-28 18:53:43,692 WARN L193 SmtUtils]: Spent 129.00 ms on a formula simplification that was a NOOP. DAG size: 151 [2020-10-28 18:53:44,580 WARN L193 SmtUtils]: Spent 151.00 ms on a formula simplification that was a NOOP. DAG size: 149 [2020-10-28 18:53:47,616 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 18:53:47,616 INFO L93 Difference]: Finished difference Result 55959 states and 80827 transitions. [2020-10-28 18:53:47,617 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-28 18:53:47,617 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 66 [2020-10-28 18:53:47,617 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 18:53:47,689 INFO L225 Difference]: With dead ends: 55959 [2020-10-28 18:53:47,689 INFO L226 Difference]: Without dead ends: 30389 [2020-10-28 18:53:47,740 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2020-10-28 18:53:47,772 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30389 states. [2020-10-28 18:53:50,312 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30389 to 19717. [2020-10-28 18:53:50,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19717 states. [2020-10-28 18:53:50,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19717 states to 19717 states and 28278 transitions. [2020-10-28 18:53:50,341 INFO L78 Accepts]: Start accepts. Automaton has 19717 states and 28278 transitions. Word has length 66 [2020-10-28 18:53:50,341 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 18:53:50,341 INFO L481 AbstractCegarLoop]: Abstraction has 19717 states and 28278 transitions. [2020-10-28 18:53:50,341 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-28 18:53:50,341 INFO L276 IsEmpty]: Start isEmpty. Operand 19717 states and 28278 transitions. [2020-10-28 18:53:50,347 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-10-28 18:53:50,347 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 18:53:50,347 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 18:53:50,347 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-28 18:53:50,348 INFO L429 AbstractCegarLoop]: === Iteration 15 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 18:53:50,348 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 18:53:50,348 INFO L82 PathProgramCache]: Analyzing trace with hash -324804177, now seen corresponding path program 1 times [2020-10-28 18:53:50,348 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 18:53:50,348 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [502893037] [2020-10-28 18:53:50,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 18:53:50,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:53:50,384 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:53:50,414 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:53:50,470 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:53:50,541 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:53:50,582 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:53:50,757 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:53:50,840 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:53:50,938 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:53:50,991 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:53:51,186 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:53:51,478 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:53:51,577 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:53:51,603 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:53:51,645 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:53:51,989 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:53:52,140 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:53:52,230 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:53:52,256 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:53:52,815 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:53:54,462 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:53:54,808 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:53:54,929 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:53:54,956 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:53:55,215 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:53:55,363 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:53:55,387 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:53:55,387 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 74 [2020-10-28 18:53:55,387 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 25 [2020-10-28 18:53:55,387 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5017 [2020-10-28 18:53:55,387 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:53:55,388 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:53:55,388 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 18:53:55,388 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-28 18:53:55,388 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 41 [2020-10-28 18:53:55,388 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:53:55,582 WARN L193 SmtUtils]: Spent 142.00 ms on a formula simplification that was a NOOP. DAG size: 142 [2020-10-28 18:53:55,583 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 18:53:55,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:53:55,591 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:53:55,603 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:53:55,604 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 18:53:55,604 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 18:53:55,604 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 14 [2020-10-28 18:53:55,604 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:53:55,604 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:53:55,604 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 18:53:55,604 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 18:53:55,604 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-28 18:53:55,604 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:53:55,617 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 18:53:55,617 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [502893037] [2020-10-28 18:53:55,618 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 18:53:55,618 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-28 18:53:55,618 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [774644779] [2020-10-28 18:53:55,618 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-28 18:53:55,619 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 18:53:55,619 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-28 18:53:55,619 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-10-28 18:53:55,619 INFO L87 Difference]: Start difference. First operand 19717 states and 28278 transitions. Second operand 6 states. [2020-10-28 18:53:55,807 WARN L193 SmtUtils]: Spent 154.00 ms on a formula simplification that was a NOOP. DAG size: 151 [2020-10-28 18:53:56,519 WARN L193 SmtUtils]: Spent 150.00 ms on a formula simplification that was a NOOP. DAG size: 149 [2020-10-28 18:53:58,052 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 18:53:58,052 INFO L93 Difference]: Finished difference Result 29673 states and 42789 transitions. [2020-10-28 18:53:58,052 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-28 18:53:58,052 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 66 [2020-10-28 18:53:58,052 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 18:53:58,074 INFO L225 Difference]: With dead ends: 29673 [2020-10-28 18:53:58,074 INFO L226 Difference]: Without dead ends: 14261 [2020-10-28 18:53:58,099 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2020-10-28 18:53:58,113 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14261 states. [2020-10-28 18:54:00,116 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14261 to 14216. [2020-10-28 18:54:00,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14216 states. [2020-10-28 18:54:00,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14216 states to 14216 states and 20397 transitions. [2020-10-28 18:54:00,139 INFO L78 Accepts]: Start accepts. Automaton has 14216 states and 20397 transitions. Word has length 66 [2020-10-28 18:54:00,139 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 18:54:00,139 INFO L481 AbstractCegarLoop]: Abstraction has 14216 states and 20397 transitions. [2020-10-28 18:54:00,139 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-28 18:54:00,139 INFO L276 IsEmpty]: Start isEmpty. Operand 14216 states and 20397 transitions. [2020-10-28 18:54:00,142 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-10-28 18:54:00,143 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 18:54:00,143 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 18:54:00,143 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-28 18:54:00,143 INFO L429 AbstractCegarLoop]: === Iteration 16 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 18:54:00,144 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 18:54:00,144 INFO L82 PathProgramCache]: Analyzing trace with hash -698158340, now seen corresponding path program 1 times [2020-10-28 18:54:00,144 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 18:54:00,144 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [71680051] [2020-10-28 18:54:00,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 18:54:00,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:54:00,186 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:54:00,239 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:54:00,285 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:54:00,406 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:54:00,735 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:54:00,901 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:54:01,070 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:54:02,050 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:54:02,509 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:54:03,401 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:54:03,612 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:54:03,969 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:54:04,121 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:54:05,174 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:54:05,175 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 75 [2020-10-28 18:54:05,175 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 13 [2020-10-28 18:54:05,175 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-28 18:54:05,175 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:54:05,175 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:54:05,175 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-28 18:54:05,175 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-28 18:54:05,175 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 56 [2020-10-28 18:54:05,175 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:54:05,455 WARN L193 SmtUtils]: Spent 138.00 ms on a formula simplification that was a NOOP. DAG size: 142 [2020-10-28 18:54:05,458 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 18:54:05,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:54:05,468 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:54:05,481 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:54:05,481 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 18:54:05,481 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 18:54:05,481 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 15 [2020-10-28 18:54:05,481 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:54:05,481 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:54:05,482 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 18:54:05,482 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 18:54:05,482 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-28 18:54:05,482 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:54:05,510 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 18:54:05,510 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [71680051] [2020-10-28 18:54:05,511 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 18:54:05,511 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-10-28 18:54:05,511 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1886666540] [2020-10-28 18:54:05,511 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-28 18:54:05,511 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 18:54:05,512 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-28 18:54:05,512 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2020-10-28 18:54:05,512 INFO L87 Difference]: Start difference. First operand 14216 states and 20397 transitions. Second operand 11 states. [2020-10-28 18:54:05,743 WARN L193 SmtUtils]: Spent 175.00 ms on a formula simplification that was a NOOP. DAG size: 155 [2020-10-28 18:54:07,196 WARN L193 SmtUtils]: Spent 170.00 ms on a formula simplification that was a NOOP. DAG size: 151 [2020-10-28 18:54:07,475 WARN L193 SmtUtils]: Spent 162.00 ms on a formula simplification that was a NOOP. DAG size: 149 [2020-10-28 18:54:11,071 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 18:54:11,071 INFO L93 Difference]: Finished difference Result 40648 states and 58284 transitions. [2020-10-28 18:54:11,072 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-28 18:54:11,072 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 67 [2020-10-28 18:54:11,072 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 18:54:11,111 INFO L225 Difference]: With dead ends: 40648 [2020-10-28 18:54:11,111 INFO L226 Difference]: Without dead ends: 27611 [2020-10-28 18:54:11,125 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=139, Invalid=413, Unknown=0, NotChecked=0, Total=552 [2020-10-28 18:54:11,148 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27611 states. [2020-10-28 18:54:13,074 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27611 to 13960. [2020-10-28 18:54:13,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13960 states. [2020-10-28 18:54:13,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13960 states to 13960 states and 20036 transitions. [2020-10-28 18:54:13,095 INFO L78 Accepts]: Start accepts. Automaton has 13960 states and 20036 transitions. Word has length 67 [2020-10-28 18:54:13,095 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 18:54:13,095 INFO L481 AbstractCegarLoop]: Abstraction has 13960 states and 20036 transitions. [2020-10-28 18:54:13,095 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-28 18:54:13,095 INFO L276 IsEmpty]: Start isEmpty. Operand 13960 states and 20036 transitions. [2020-10-28 18:54:13,098 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-10-28 18:54:13,098 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 18:54:13,098 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 18:54:13,098 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-28 18:54:13,098 INFO L429 AbstractCegarLoop]: === Iteration 17 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 18:54:13,099 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 18:54:13,099 INFO L82 PathProgramCache]: Analyzing trace with hash -1500710786, now seen corresponding path program 1 times [2020-10-28 18:54:13,099 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 18:54:13,099 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [752083841] [2020-10-28 18:54:13,099 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 18:54:13,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:54:13,131 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:54:13,169 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:54:13,210 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:54:13,506 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:54:13,608 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:54:14,225 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:54:14,795 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:54:14,987 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:54:15,338 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:54:15,423 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:54:15,494 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:54:16,272 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:54:17,729 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:54:18,126 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:54:18,126 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 75 [2020-10-28 18:54:18,126 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 13 [2020-10-28 18:54:18,126 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5006 [2020-10-28 18:54:18,127 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:54:18,127 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:54:18,127 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-28 18:54:18,127 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-28 18:54:18,127 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 62 [2020-10-28 18:54:18,127 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:54:18,478 WARN L193 SmtUtils]: Spent 131.00 ms on a formula simplification that was a NOOP. DAG size: 142 [2020-10-28 18:54:18,479 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 18:54:18,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:54:18,489 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:54:18,497 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:54:18,497 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 18:54:18,497 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 18:54:18,498 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-10-28 18:54:18,498 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:54:18,498 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:54:18,498 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 18:54:18,498 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 18:54:18,498 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-28 18:54:18,498 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:54:18,516 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 18:54:18,516 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [752083841] [2020-10-28 18:54:18,516 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 18:54:18,516 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2020-10-28 18:54:18,516 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2105908048] [2020-10-28 18:54:18,517 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-28 18:54:18,517 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 18:54:18,517 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-28 18:54:18,518 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=128, Unknown=0, NotChecked=0, Total=156 [2020-10-28 18:54:18,518 INFO L87 Difference]: Start difference. First operand 13960 states and 20036 transitions. Second operand 13 states. [2020-10-28 18:54:18,991 WARN L193 SmtUtils]: Spent 378.00 ms on a formula simplification. DAG size of input: 160 DAG size of output: 158 [2020-10-28 18:54:21,421 WARN L193 SmtUtils]: Spent 428.00 ms on a formula simplification. DAG size of input: 163 DAG size of output: 161 [2020-10-28 18:54:21,858 WARN L193 SmtUtils]: Spent 269.00 ms on a formula simplification that was a NOOP. DAG size: 155 [2020-10-28 18:54:24,397 WARN L193 SmtUtils]: Spent 391.00 ms on a formula simplification. DAG size of input: 159 DAG size of output: 157 [2020-10-28 18:54:25,315 WARN L193 SmtUtils]: Spent 185.00 ms on a formula simplification that was a NOOP. DAG size: 151 [2020-10-28 18:54:38,149 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 18:54:38,149 INFO L93 Difference]: Finished difference Result 96115 states and 134648 transitions. [2020-10-28 18:54:38,150 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2020-10-28 18:54:38,150 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 67 [2020-10-28 18:54:38,150 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 18:54:38,270 INFO L225 Difference]: With dead ends: 96115 [2020-10-28 18:54:38,270 INFO L226 Difference]: Without dead ends: 86230 [2020-10-28 18:54:38,291 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1032 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=635, Invalid=2557, Unknown=0, NotChecked=0, Total=3192 [2020-10-28 18:54:38,367 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86230 states. [2020-10-28 18:54:42,236 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86230 to 19809. [2020-10-28 18:54:42,236 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19809 states. [2020-10-28 18:54:42,266 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19809 states to 19809 states and 28523 transitions. [2020-10-28 18:54:42,267 INFO L78 Accepts]: Start accepts. Automaton has 19809 states and 28523 transitions. Word has length 67 [2020-10-28 18:54:42,267 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 18:54:42,267 INFO L481 AbstractCegarLoop]: Abstraction has 19809 states and 28523 transitions. [2020-10-28 18:54:42,267 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-28 18:54:42,267 INFO L276 IsEmpty]: Start isEmpty. Operand 19809 states and 28523 transitions. [2020-10-28 18:54:42,270 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-10-28 18:54:42,270 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 18:54:42,270 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 18:54:42,271 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-28 18:54:42,271 INFO L429 AbstractCegarLoop]: === Iteration 18 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 18:54:42,271 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 18:54:42,271 INFO L82 PathProgramCache]: Analyzing trace with hash -1419122182, now seen corresponding path program 1 times [2020-10-28 18:54:42,272 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 18:54:42,272 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1142042101] [2020-10-28 18:54:42,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 18:54:42,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:54:42,311 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:54:42,367 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:54:42,410 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:54:42,886 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:54:43,020 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:54:43,259 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:54:43,298 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:54:43,487 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:54:43,836 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:54:43,967 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:54:43,998 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:54:44,713 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:54:45,757 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:54:46,259 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:54:46,354 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:54:46,756 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:54:47,301 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:54:47,365 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:54:47,365 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 75 [2020-10-28 18:54:47,365 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 17 [2020-10-28 18:54:47,366 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5070 [2020-10-28 18:54:47,366 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:54:47,366 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:54:47,366 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-28 18:54:47,366 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-28 18:54:47,366 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 62 [2020-10-28 18:54:47,366 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:54:47,758 WARN L193 SmtUtils]: Spent 159.00 ms on a formula simplification that was a NOOP. DAG size: 142 [2020-10-28 18:54:47,759 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 18:54:47,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:54:47,768 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:54:47,781 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:54:47,781 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 18:54:47,781 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 18:54:47,782 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 16 [2020-10-28 18:54:47,782 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:54:47,782 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:54:47,782 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 18:54:47,782 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 18:54:47,782 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-28 18:54:47,782 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:54:47,802 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 18:54:47,802 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1142042101] [2020-10-28 18:54:47,802 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 18:54:47,802 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2020-10-28 18:54:47,802 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1958671531] [2020-10-28 18:54:47,803 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-28 18:54:47,803 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 18:54:47,803 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-28 18:54:47,803 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2020-10-28 18:54:47,804 INFO L87 Difference]: Start difference. First operand 19809 states and 28523 transitions. Second operand 13 states. [2020-10-28 18:54:48,335 WARN L193 SmtUtils]: Spent 419.00 ms on a formula simplification. DAG size of input: 163 DAG size of output: 161 [2020-10-28 18:54:49,258 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 32 [2020-10-28 18:54:51,043 WARN L193 SmtUtils]: Spent 191.00 ms on a formula simplification that was a NOOP. DAG size: 162 [2020-10-28 18:54:54,469 WARN L193 SmtUtils]: Spent 400.00 ms on a formula simplification. DAG size of input: 158 DAG size of output: 156 [2020-10-28 18:54:54,956 WARN L193 SmtUtils]: Spent 195.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-28 18:55:08,480 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 18:55:08,481 INFO L93 Difference]: Finished difference Result 86418 states and 120376 transitions. [2020-10-28 18:55:08,481 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2020-10-28 18:55:08,481 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 67 [2020-10-28 18:55:08,482 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 18:55:08,586 INFO L225 Difference]: With dead ends: 86418 [2020-10-28 18:55:08,586 INFO L226 Difference]: Without dead ends: 75746 [2020-10-28 18:55:08,610 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1097 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=700, Invalid=2606, Unknown=0, NotChecked=0, Total=3306 [2020-10-28 18:55:08,666 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75746 states. [2020-10-28 18:55:12,772 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75746 to 19848. [2020-10-28 18:55:12,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19848 states. [2020-10-28 18:55:12,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19848 states to 19848 states and 28579 transitions. [2020-10-28 18:55:12,803 INFO L78 Accepts]: Start accepts. Automaton has 19848 states and 28579 transitions. Word has length 67 [2020-10-28 18:55:12,804 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 18:55:12,804 INFO L481 AbstractCegarLoop]: Abstraction has 19848 states and 28579 transitions. [2020-10-28 18:55:12,804 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-28 18:55:12,804 INFO L276 IsEmpty]: Start isEmpty. Operand 19848 states and 28579 transitions. [2020-10-28 18:55:12,806 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2020-10-28 18:55:12,806 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 18:55:12,806 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] [2020-10-28 18:55:12,806 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-28 18:55:12,806 INFO L429 AbstractCegarLoop]: === Iteration 19 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 18:55:12,807 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 18:55:12,807 INFO L82 PathProgramCache]: Analyzing trace with hash -1488189302, now seen corresponding path program 1 times [2020-10-28 18:55:12,807 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 18:55:12,807 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1847694315] [2020-10-28 18:55:12,807 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 18:55:12,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:55:12,834 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:55:12,854 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:55:12,971 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:55:13,671 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:55:13,822 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:55:16,952 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:55:16,952 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 76 [2020-10-28 18:55:16,952 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-28 18:55:16,952 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4126 [2020-10-28 18:55:16,952 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:55:16,952 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:55:16,952 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 18:55:16,952 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 38 [2020-10-28 18:55:16,953 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-10-28 18:55:16,953 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:55:17,139 WARN L193 SmtUtils]: Spent 147.00 ms on a formula simplification that was a NOOP. DAG size: 142 [2020-10-28 18:55:17,140 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 18:55:17,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:55:17,148 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:55:17,153 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:55:17,153 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 18:55:17,153 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 18:55:17,153 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-28 18:55:17,153 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:55:17,153 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:55:17,153 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 18:55:17,153 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 18:55:17,154 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 18:55:17,154 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:55:17,163 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 18:55:17,164 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1847694315] [2020-10-28 18:55:17,164 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 18:55:17,164 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 18:55:17,164 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [373258475] [2020-10-28 18:55:17,164 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 18:55:17,165 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 18:55:17,165 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 18:55:17,165 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 18:55:17,165 INFO L87 Difference]: Start difference. First operand 19848 states and 28579 transitions. Second operand 4 states. [2020-10-28 18:55:18,080 WARN L193 SmtUtils]: Spent 174.00 ms on a formula simplification that was a NOOP. DAG size: 147 [2020-10-28 18:55:21,788 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 18:55:21,788 INFO L93 Difference]: Finished difference Result 27231 states and 39050 transitions. [2020-10-28 18:55:21,788 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 18:55:21,789 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 68 [2020-10-28 18:55:21,789 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 18:55:21,813 INFO L225 Difference]: With dead ends: 27231 [2020-10-28 18:55:21,814 INFO L226 Difference]: Without dead ends: 19646 [2020-10-28 18:55:21,826 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-28 18:55:21,843 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19646 states. [2020-10-28 18:55:25,103 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19646 to 15943. [2020-10-28 18:55:25,103 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15943 states. [2020-10-28 18:55:25,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15943 states to 15943 states and 22523 transitions. [2020-10-28 18:55:25,129 INFO L78 Accepts]: Start accepts. Automaton has 15943 states and 22523 transitions. Word has length 68 [2020-10-28 18:55:25,129 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 18:55:25,129 INFO L481 AbstractCegarLoop]: Abstraction has 15943 states and 22523 transitions. [2020-10-28 18:55:25,129 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 18:55:25,129 INFO L276 IsEmpty]: Start isEmpty. Operand 15943 states and 22523 transitions. [2020-10-28 18:55:25,132 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2020-10-28 18:55:25,132 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 18:55:25,132 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] [2020-10-28 18:55:25,132 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-28 18:55:25,132 INFO L429 AbstractCegarLoop]: === Iteration 20 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 18:55:25,133 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 18:55:25,133 INFO L82 PathProgramCache]: Analyzing trace with hash -2134662672, now seen corresponding path program 1 times [2020-10-28 18:55:25,133 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 18:55:25,133 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [887068107] [2020-10-28 18:55:25,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 18:55:25,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:55:25,169 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:55:25,200 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:55:25,254 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:55:25,722 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:55:25,811 FATAL L256 erpolLogProxyWrapper]: Now shrinking...