/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.3.1.ufo.BOUNDED-6.pals.c.v+sep-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-28 18:50:34,653 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-28 18:50:34,657 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-28 18:50:34,698 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-28 18:50:34,699 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-28 18:50:34,700 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-28 18:50:34,702 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-28 18:50:34,705 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-28 18:50:34,707 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-28 18:50:34,708 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-28 18:50:34,710 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-28 18:50:34,711 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-28 18:50:34,712 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-28 18:50:34,713 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-28 18:50:34,715 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-28 18:50:34,716 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-28 18:50:34,718 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-28 18:50:34,719 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-28 18:50:34,721 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-28 18:50:34,724 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-28 18:50:34,726 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-28 18:50:34,728 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-28 18:50:34,729 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-28 18:50:34,730 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-28 18:50:34,750 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-28 18:50:34,750 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-28 18:50:34,751 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-28 18:50:34,752 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-28 18:50:34,753 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-28 18:50:34,756 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-28 18:50:34,757 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-28 18:50:34,758 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-28 18:50:34,759 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-28 18:50:34,760 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-28 18:50:34,761 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-28 18:50:34,761 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-28 18:50:34,762 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-28 18:50:34,762 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-28 18:50:34,763 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-28 18:50:34,764 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-28 18:50:34,765 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-28 18:50:34,768 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 18:50:34,795 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-28 18:50:34,795 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-28 18:50:34,797 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-28 18:50:34,797 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-28 18:50:34,797 INFO L138 SettingsManager]: * Use SBE=true [2020-10-28 18:50:34,798 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-28 18:50:34,798 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-28 18:50:34,798 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-28 18:50:34,799 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-28 18:50:34,799 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-28 18:50:34,799 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-28 18:50:34,799 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-28 18:50:34,800 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-28 18:50:34,800 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-28 18:50:34,800 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-28 18:50:34,800 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-28 18:50:34,801 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-28 18:50:34,801 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-28 18:50:34,801 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-28 18:50:34,802 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-28 18:50:34,802 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-28 18:50:34,802 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-28 18:50:34,802 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-28 18:50:34,803 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-28 18:50:34,803 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-28 18:50:34,803 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-28 18:50:34,803 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-28 18:50:34,804 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-28 18:50:34,804 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-28 18:50:34,804 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.6;log-additional-information=true;unknown-allowed=true; [2020-10-28 18:50:35,261 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-28 18:50:35,289 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-28 18:50:35,293 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-28 18:50:35,294 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-28 18:50:35,295 INFO L275 PluginConnector]: CDTParser initialized [2020-10-28 18:50:35,296 INFO L432 ainManager$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.3.1.ufo.BOUNDED-6.pals.c.v+sep-reducer.c [2020-10-28 18:50:35,389 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/9900fbebb/b18d72dea1f8491eb429d9fb62999333/FLAGf850b4933 [2020-10-28 18:50:36,396 INFO L306 CDTParser]: Found 1 translation units. [2020-10-28 18:50:36,397 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/seq-mthreaded-reduced/pals_lcr-var-start-time.3.1.ufo.BOUNDED-6.pals.c.v+sep-reducer.c [2020-10-28 18:50:36,432 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/9900fbebb/b18d72dea1f8491eb429d9fb62999333/FLAGf850b4933 [2020-10-28 18:50:36,943 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/9900fbebb/b18d72dea1f8491eb429d9fb62999333 [2020-10-28 18:50:36,948 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-28 18:50:36,959 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-28 18:50:36,963 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-28 18:50:36,964 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-28 18:50:36,968 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-28 18:50:36,970 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 06:50:36" (1/1) ... [2020-10-28 18:50:36,975 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@33743a43 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 06:50:36, skipping insertion in model container [2020-10-28 18:50:36,975 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 06:50:36" (1/1) ... [2020-10-28 18:50:36,984 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-28 18:50:37,160 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-28 18:50:38,141 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-28 18:50:38,162 INFO L203 MainTranslator]: Completed pre-run [2020-10-28 18:50:38,529 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-28 18:50:38,567 INFO L208 MainTranslator]: Completed translation [2020-10-28 18:50:38,569 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 06:50:38 WrapperNode [2020-10-28 18:50:38,569 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-28 18:50:38,570 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-28 18:50:38,570 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-28 18:50:38,570 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-28 18:50:38,584 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 06:50:38" (1/1) ... [2020-10-28 18:50:38,586 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 06:50:38" (1/1) ... [2020-10-28 18:50:38,665 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 06:50:38" (1/1) ... [2020-10-28 18:50:38,666 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 06:50:38" (1/1) ... [2020-10-28 18:50:38,775 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 06:50:38" (1/1) ... [2020-10-28 18:50:38,811 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 06:50:38" (1/1) ... [2020-10-28 18:50:38,831 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 06:50:38" (1/1) ... [2020-10-28 18:50:38,855 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-28 18:50:38,856 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-28 18:50:38,857 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-28 18:50:38,857 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-28 18:50:38,858 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 06:50:38" (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 18:50:38,940 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-28 18:50:38,940 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-28 18:50:38,940 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-28 18:50:38,940 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-10-28 18:50:38,941 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-28 18:50:38,941 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-28 18:50:38,941 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-28 18:50:38,941 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-28 18:50:38,941 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-28 18:50:38,942 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-10-28 18:50:38,942 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-10-28 18:50:38,942 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2020-10-28 18:50:38,942 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-10-28 18:50:38,942 INFO L130 BoogieDeclarations]: Found specification of procedure read [2020-10-28 18:50:38,942 INFO L130 BoogieDeclarations]: Found specification of procedure write [2020-10-28 18:50:38,943 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2020-10-28 18:50:38,943 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2020-10-28 18:50:38,943 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2020-10-28 18:50:38,943 INFO L130 BoogieDeclarations]: Found specification of procedure init [2020-10-28 18:50:38,943 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-10-28 18:50:38,943 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-28 18:50:38,943 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-28 18:50:38,944 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-28 18:50:38,944 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-28 18:50:38,944 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-28 18:50:38,944 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-28 18:50:38,944 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-28 18:50:44,792 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-28 18:50:44,792 INFO L298 CfgBuilder]: Removed 0 assume(true) statements. [2020-10-28 18:50:44,797 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 06:50:44 BoogieIcfgContainer [2020-10-28 18:50:44,798 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-28 18:50:44,802 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-28 18:50:44,802 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-28 18:50:44,806 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-28 18:50:44,807 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.10 06:50:36" (1/3) ... [2020-10-28 18:50:44,809 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5391ae1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 06:50:44, skipping insertion in model container [2020-10-28 18:50:44,809 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 06:50:38" (2/3) ... [2020-10-28 18:50:44,810 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5391ae1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 06:50:44, skipping insertion in model container [2020-10-28 18:50:44,811 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 06:50:44" (3/3) ... [2020-10-28 18:50:44,813 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_lcr-var-start-time.3.1.ufo.BOUNDED-6.pals.c.v+sep-reducer.c [2020-10-28 18:50:44,828 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-28 18:50:44,836 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-28 18:50:44,853 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-28 18:50:44,904 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-28 18:50:44,905 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-28 18:50:44,905 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-28 18:50:44,905 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-28 18:50:44,905 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-28 18:50:44,905 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-28 18:50:44,905 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-28 18:50:44,906 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-28 18:50:44,961 INFO L276 IsEmpty]: Start isEmpty. Operand 1299 states. [2020-10-28 18:50:44,997 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-10-28 18:50:44,998 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 18:50:44,999 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 18:50:44,999 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 18:50:45,006 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 18:50:45,006 INFO L82 PathProgramCache]: Analyzing trace with hash 273753204, now seen corresponding path program 1 times [2020-10-28 18:50:45,017 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 18:50:45,018 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [9474185] [2020-10-28 18:50:45,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 18:50:45,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:50:45,726 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:50:46,010 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:50:46,369 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:50:46,665 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:50:49,255 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:50:50,592 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:50:50,592 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 65 [2020-10-28 18:50:50,593 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-28 18:50:50,593 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5017 [2020-10-28 18:50:50,596 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:50:50,597 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:50:50,597 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-28 18:50:50,597 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 18:50:50,597 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 40 [2020-10-28 18:50:50,598 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-10-28 18:50:54,659 WARN L193 SmtUtils]: Spent 3.51 s on a formula simplification that was a NOOP. DAG size: 529 [2020-10-28 18:50:54,663 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 18:50:54,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:50:54,686 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:50:54,712 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:50:54,713 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 18:50:54,713 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 18:50:54,713 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 33 [2020-10-28 18:50:54,713 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:50:54,714 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:50:54,714 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 18:50:54,714 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 18:50:54,714 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 18:50:54,714 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:50:54,777 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 18:50:54,778 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [9474185] [2020-10-28 18:50:54,780 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 18:50:54,780 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-10-28 18:50:54,781 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [235814877] [2020-10-28 18:50:54,786 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-28 18:50:54,786 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 18:50:54,801 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-28 18:50:54,802 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-10-28 18:50:54,804 INFO L87 Difference]: Start difference. First operand 1299 states. Second operand 8 states. [2020-10-28 18:51:02,214 WARN L193 SmtUtils]: Spent 7.15 s on a formula simplification. DAG size of input: 547 DAG size of output: 546 [2020-10-28 18:51:24,804 WARN L193 SmtUtils]: Spent 7.60 s on a formula simplification. DAG size of input: 546 DAG size of output: 545 [2020-10-28 18:51:28,840 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 18:51:28,841 INFO L93 Difference]: Finished difference Result 2015 states and 3431 transitions. [2020-10-28 18:51:28,848 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-28 18:51:28,849 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 57 [2020-10-28 18:51:28,850 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 18:51:28,883 INFO L225 Difference]: With dead ends: 2015 [2020-10-28 18:51:28,883 INFO L226 Difference]: Without dead ends: 1877 [2020-10-28 18:51:28,889 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 18.9s TimeCoverageRelationStatistics Valid=55, Invalid=127, Unknown=0, NotChecked=0, Total=182 [2020-10-28 18:51:28,912 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1877 states. [2020-10-28 18:51:29,025 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1877 to 1285. [2020-10-28 18:51:29,026 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1285 states. [2020-10-28 18:51:29,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1285 states to 1285 states and 1678 transitions. [2020-10-28 18:51:29,036 INFO L78 Accepts]: Start accepts. Automaton has 1285 states and 1678 transitions. Word has length 57 [2020-10-28 18:51:29,036 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 18:51:29,036 INFO L481 AbstractCegarLoop]: Abstraction has 1285 states and 1678 transitions. [2020-10-28 18:51:29,036 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-28 18:51:29,037 INFO L276 IsEmpty]: Start isEmpty. Operand 1285 states and 1678 transitions. [2020-10-28 18:51:29,042 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-10-28 18:51:29,042 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 18:51:29,043 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 18:51:29,043 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-28 18:51:29,043 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 18:51:29,044 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 18:51:29,044 INFO L82 PathProgramCache]: Analyzing trace with hash 919223166, now seen corresponding path program 1 times [2020-10-28 18:51:29,044 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 18:51:29,045 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1141638525] [2020-10-28 18:51:29,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 18:51:29,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:51:29,144 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:51:29,214 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:51:29,305 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:51:29,418 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:51:29,869 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:51:30,711 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:51:32,305 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:51:34,116 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:51:34,118 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 66 [2020-10-28 18:51:34,118 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-28 18:51:34,118 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5009 [2020-10-28 18:51:34,119 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:51:34,126 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:51:34,126 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 18:51:34,126 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-28 18:51:34,127 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-10-28 18:51:34,127 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 8 [2020-10-28 18:51:37,705 WARN L193 SmtUtils]: Spent 3.46 s on a formula simplification that was a NOOP. DAG size: 529 [2020-10-28 18:51:37,711 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 18:51:37,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:51:37,732 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:51:37,758 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:51:37,758 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 18:51:37,758 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 18:51:37,759 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 32 [2020-10-28 18:51:37,759 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:51:37,759 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:51:37,759 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 18:51:37,759 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 18:51:37,760 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 18:51:37,760 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:51:37,799 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 18:51:37,799 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1141638525] [2020-10-28 18:51:37,800 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 18:51:37,800 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 18:51:37,800 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [578612134] [2020-10-28 18:51:37,802 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 18:51:37,802 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 18:51:37,802 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 18:51:37,803 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 18:51:37,803 INFO L87 Difference]: Start difference. First operand 1285 states and 1678 transitions. Second operand 4 states. [2020-10-28 18:51:41,555 WARN L193 SmtUtils]: Spent 3.63 s on a formula simplification that was a NOOP. DAG size: 530 [2020-10-28 18:51:50,373 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 18:51:50,373 INFO L93 Difference]: Finished difference Result 1817 states and 2412 transitions. [2020-10-28 18:51:50,374 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 18:51:50,374 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 58 [2020-10-28 18:51:50,374 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 18:51:50,382 INFO L225 Difference]: With dead ends: 1817 [2020-10-28 18:51:50,382 INFO L226 Difference]: Without dead ends: 1371 [2020-10-28 18:51:50,386 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 7.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-28 18:51:50,389 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1371 states. [2020-10-28 18:51:50,454 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1371 to 1365. [2020-10-28 18:51:50,454 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1365 states. [2020-10-28 18:51:50,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1365 states to 1365 states and 1799 transitions. [2020-10-28 18:51:50,462 INFO L78 Accepts]: Start accepts. Automaton has 1365 states and 1799 transitions. Word has length 58 [2020-10-28 18:51:50,463 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 18:51:50,463 INFO L481 AbstractCegarLoop]: Abstraction has 1365 states and 1799 transitions. [2020-10-28 18:51:50,463 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 18:51:50,463 INFO L276 IsEmpty]: Start isEmpty. Operand 1365 states and 1799 transitions. [2020-10-28 18:51:50,468 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-10-28 18:51:50,468 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 18:51:50,469 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 18:51:50,469 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-28 18:51:50,469 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 18:51:50,470 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 18:51:50,471 INFO L82 PathProgramCache]: Analyzing trace with hash -1320308122, now seen corresponding path program 1 times [2020-10-28 18:51:50,471 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 18:51:50,471 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1318098779] [2020-10-28 18:51:50,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 18:51:50,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:51:50,574 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:51:50,669 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:51:50,884 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:51:52,032 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:51:52,495 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:51:52,751 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:51:53,790 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:51:53,962 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:51:54,319 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:51:54,659 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:51:54,810 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:51:54,939 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:51:55,540 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:51:55,540 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 66 [2020-10-28 18:51:55,541 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 12 [2020-10-28 18:51:55,541 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5006 [2020-10-28 18:51:55,541 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:51:55,541 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:51:55,541 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-28 18:51:55,542 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 18:51:55,542 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 41 [2020-10-28 18:51:55,542 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 18:51:59,437 WARN L193 SmtUtils]: Spent 3.63 s on a formula simplification that was a NOOP. DAG size: 529 [2020-10-28 18:51:59,439 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 18:51:59,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:51:59,460 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:51:59,521 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:51:59,522 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 18:51:59,522 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 18:51:59,522 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 66 [2020-10-28 18:51:59,522 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:51:59,523 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:51:59,523 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 18:51:59,523 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 18:51:59,523 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 18:51:59,523 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 18:51:59,575 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 18:51:59,576 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1318098779] [2020-10-28 18:51:59,577 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 18:51:59,578 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-10-28 18:51:59,578 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2021853885] [2020-10-28 18:51:59,580 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-28 18:51:59,581 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 18:51:59,581 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-28 18:51:59,582 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-10-28 18:51:59,583 INFO L87 Difference]: Start difference. First operand 1365 states and 1799 transitions. Second operand 8 states. [2020-10-28 18:52:03,631 WARN L193 SmtUtils]: Spent 3.90 s on a formula simplification that was a NOOP. DAG size: 537 [2020-10-28 18:52:14,337 WARN L193 SmtUtils]: Spent 3.87 s on a formula simplification that was a NOOP. DAG size: 543 [2020-10-28 18:52:19,486 WARN L193 SmtUtils]: Spent 3.73 s on a formula simplification that was a NOOP. DAG size: 535 [2020-10-28 18:52:21,580 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 18:52:21,580 INFO L93 Difference]: Finished difference Result 2681 states and 3715 transitions. [2020-10-28 18:52:21,581 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-28 18:52:21,581 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 58 [2020-10-28 18:52:21,582 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 18:52:21,594 INFO L225 Difference]: With dead ends: 2681 [2020-10-28 18:52:21,594 INFO L226 Difference]: Without dead ends: 1979 [2020-10-28 18:52:21,598 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 15.5s TimeCoverageRelationStatistics Valid=64, Invalid=176, Unknown=0, NotChecked=0, Total=240 [2020-10-28 18:52:21,602 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1979 states. [2020-10-28 18:52:21,715 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1979 to 1429. [2020-10-28 18:52:21,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1429 states. [2020-10-28 18:52:21,724 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1429 states to 1429 states and 1908 transitions. [2020-10-28 18:52:21,724 INFO L78 Accepts]: Start accepts. Automaton has 1429 states and 1908 transitions. Word has length 58 [2020-10-28 18:52:21,726 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 18:52:21,727 INFO L481 AbstractCegarLoop]: Abstraction has 1429 states and 1908 transitions. [2020-10-28 18:52:21,727 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-28 18:52:21,727 INFO L276 IsEmpty]: Start isEmpty. Operand 1429 states and 1908 transitions. [2020-10-28 18:52:21,729 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-10-28 18:52:21,730 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 18:52:21,730 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 18:52:21,732 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-28 18:52:21,732 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 18:52:21,733 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 18:52:21,733 INFO L82 PathProgramCache]: Analyzing trace with hash 304606119, now seen corresponding path program 1 times [2020-10-28 18:52:21,733 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 18:52:21,734 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [282835010] [2020-10-28 18:52:21,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 18:52:21,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:52:21,840 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:52:22,042 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:52:22,408 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:52:22,534 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:52:22,794 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:52:24,951 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:52:25,375 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:52:25,535 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:52:26,002 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:52:26,100 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:52:26,524 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:52:26,810 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:52:26,810 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 66 [2020-10-28 18:52:26,810 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 11 [2020-10-28 18:52:26,810 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5009 [2020-10-28 18:52:26,811 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:52:26,811 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:52:26,811 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 18:52:26,811 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-28 18:52:26,811 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 38 [2020-10-28 18:52:26,811 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:52:30,635 WARN L193 SmtUtils]: Spent 3.65 s on a formula simplification that was a NOOP. DAG size: 529 [2020-10-28 18:52:30,637 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 18:52:30,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:52:30,675 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:52:30,766 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:52:30,767 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 18:52:30,767 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 18:52:30,767 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 103 [2020-10-28 18:52:30,767 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:52:30,768 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:52:30,768 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 18:52:30,768 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 18:52:30,768 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-28 18:52:30,768 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:52:30,819 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 18:52:30,820 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [282835010] [2020-10-28 18:52:30,820 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 18:52:30,820 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-28 18:52:30,821 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [145381810] [2020-10-28 18:52:30,821 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-28 18:52:30,821 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 18:52:30,822 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-28 18:52:30,822 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-10-28 18:52:30,822 INFO L87 Difference]: Start difference. First operand 1429 states and 1908 transitions. Second operand 6 states. [2020-10-28 18:52:34,734 WARN L193 SmtUtils]: Spent 3.74 s on a formula simplification that was a NOOP. DAG size: 538 [2020-10-28 18:52:44,794 WARN L193 SmtUtils]: Spent 3.69 s on a formula simplification that was a NOOP. DAG size: 536 [2020-10-28 18:52:46,096 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 18:52:46,096 INFO L93 Difference]: Finished difference Result 2169 states and 2970 transitions. [2020-10-28 18:52:46,098 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-28 18:52:46,099 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 58 [2020-10-28 18:52:46,099 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 18:52:46,107 INFO L225 Difference]: With dead ends: 2169 [2020-10-28 18:52:46,107 INFO L226 Difference]: Without dead ends: 1502 [2020-10-28 18:52:46,110 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 11.2s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2020-10-28 18:52:46,112 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1502 states. [2020-10-28 18:52:46,203 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1502 to 1493. [2020-10-28 18:52:46,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1493 states. [2020-10-28 18:52:46,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1493 states to 1493 states and 2024 transitions. [2020-10-28 18:52:46,210 INFO L78 Accepts]: Start accepts. Automaton has 1493 states and 2024 transitions. Word has length 58 [2020-10-28 18:52:46,210 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 18:52:46,210 INFO L481 AbstractCegarLoop]: Abstraction has 1493 states and 2024 transitions. [2020-10-28 18:52:46,211 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-28 18:52:46,211 INFO L276 IsEmpty]: Start isEmpty. Operand 1493 states and 2024 transitions. [2020-10-28 18:52:46,215 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2020-10-28 18:52:46,215 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 18:52:46,216 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 18:52:46,216 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-28 18:52:46,216 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 18:52:46,217 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 18:52:46,217 INFO L82 PathProgramCache]: Analyzing trace with hash -761155748, now seen corresponding path program 1 times [2020-10-28 18:52:46,217 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 18:52:46,218 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1161864580] [2020-10-28 18:52:46,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 18:52:46,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:52:46,322 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:52:46,477 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:52:46,805 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:52:47,208 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:52:47,722 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:52:48,173 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:52:48,301 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:52:48,487 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:52:50,176 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:52:50,467 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:52:51,136 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:52:51,261 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:52:51,343 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:52:51,343 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 68 [2020-10-28 18:52:51,343 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 12 [2020-10-28 18:52:51,343 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5059 [2020-10-28 18:52:51,343 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:52:51,344 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:52:51,344 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-28 18:52:51,344 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-28 18:52:51,344 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 55 [2020-10-28 18:52:51,344 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:52:55,103 WARN L193 SmtUtils]: Spent 3.53 s on a formula simplification that was a NOOP. DAG size: 529 [2020-10-28 18:52:55,107 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 18:52:55,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:52:55,142 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:52:55,185 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:52:55,186 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 18:52:55,186 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 18:52:55,186 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 53 [2020-10-28 18:52:55,186 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:52:55,186 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:52:55,186 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 18:52:55,187 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 18:52:55,187 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-28 18:52:55,187 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:52:55,239 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 18:52:55,240 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1161864580] [2020-10-28 18:52:55,240 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 18:52:55,240 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-10-28 18:52:55,241 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [449106152] [2020-10-28 18:52:55,241 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-28 18:52:55,241 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 18:52:55,242 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-28 18:52:55,242 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2020-10-28 18:52:55,242 INFO L87 Difference]: Start difference. First operand 1493 states and 2024 transitions. Second operand 10 states. [2020-10-28 18:52:59,177 WARN L193 SmtUtils]: Spent 3.77 s on a formula simplification that was a NOOP. DAG size: 541 [2020-10-28 18:53:08,472 WARN L193 SmtUtils]: Spent 3.66 s on a formula simplification that was a NOOP. DAG size: 537 [2020-10-28 18:53:12,596 WARN L193 SmtUtils]: Spent 3.70 s on a formula simplification that was a NOOP. DAG size: 533 [2020-10-28 18:53:19,202 WARN L193 SmtUtils]: Spent 3.64 s on a formula simplification that was a NOOP. DAG size: 535 [2020-10-28 18:53:20,180 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 18:53:20,180 INFO L93 Difference]: Finished difference Result 3568 states and 5137 transitions. [2020-10-28 18:53:20,181 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-28 18:53:20,181 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 60 [2020-10-28 18:53:20,181 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 18:53:20,196 INFO L225 Difference]: With dead ends: 3568 [2020-10-28 18:53:20,196 INFO L226 Difference]: Without dead ends: 2889 [2020-10-28 18:53:20,199 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 190 ImplicationChecksByTransitivity, 19.0s TimeCoverageRelationStatistics Valid=193, Invalid=619, Unknown=0, NotChecked=0, Total=812 [2020-10-28 18:53:20,203 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2889 states. [2020-10-28 18:53:20,329 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2889 to 1550. [2020-10-28 18:53:20,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1550 states. [2020-10-28 18:53:20,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1550 states to 1550 states and 2143 transitions. [2020-10-28 18:53:20,335 INFO L78 Accepts]: Start accepts. Automaton has 1550 states and 2143 transitions. Word has length 60 [2020-10-28 18:53:20,336 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 18:53:20,336 INFO L481 AbstractCegarLoop]: Abstraction has 1550 states and 2143 transitions. [2020-10-28 18:53:20,336 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-28 18:53:20,336 INFO L276 IsEmpty]: Start isEmpty. Operand 1550 states and 2143 transitions. [2020-10-28 18:53:20,338 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2020-10-28 18:53:20,338 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 18:53:20,338 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 18:53:20,338 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-28 18:53:20,338 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 18:53:20,339 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 18:53:20,339 INFO L82 PathProgramCache]: Analyzing trace with hash -1603416637, now seen corresponding path program 1 times [2020-10-28 18:53:20,339 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 18:53:20,340 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1345141650] [2020-10-28 18:53:20,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 18:53:20,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:53:20,409 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:53:20,526 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:53:20,606 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:53:20,775 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:53:20,848 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:53:21,186 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:53:21,720 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:53:23,003 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:53:23,115 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:53:24,052 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:53:24,980 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:53:25,388 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:53:25,389 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 68 [2020-10-28 18:53:25,389 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 11 [2020-10-28 18:53:25,389 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-28 18:53:25,389 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:53:25,389 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:53:25,389 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-28 18:53:25,389 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 18:53:25,390 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 51 [2020-10-28 18:53:25,390 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:53:29,346 WARN L193 SmtUtils]: Spent 3.67 s on a formula simplification that was a NOOP. DAG size: 529 [2020-10-28 18:53:29,349 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 18:53:29,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:53:29,371 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:53:29,389 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:53:29,390 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 18:53:29,390 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 18:53:29,390 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 23 [2020-10-28 18:53:29,390 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:53:29,390 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:53:29,391 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 18:53:29,391 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 18:53:29,391 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 18:53:29,391 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:53:29,433 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 18:53:29,433 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1345141650] [2020-10-28 18:53:29,435 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 18:53:29,435 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-10-28 18:53:29,435 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [364745175] [2020-10-28 18:53:29,436 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-28 18:53:29,436 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 18:53:29,436 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-28 18:53:29,437 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2020-10-28 18:53:29,437 INFO L87 Difference]: Start difference. First operand 1550 states and 2143 transitions. Second operand 9 states. [2020-10-28 18:53:33,353 WARN L193 SmtUtils]: Spent 3.78 s on a formula simplification that was a NOOP. DAG size: 541 [2020-10-28 18:53:41,897 WARN L193 SmtUtils]: Spent 3.92 s on a formula simplification that was a NOOP. DAG size: 543 [2020-10-28 18:53:44,761 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 18:53:44,761 INFO L93 Difference]: Finished difference Result 2082 states and 2961 transitions. [2020-10-28 18:53:44,762 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-28 18:53:44,763 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 60 [2020-10-28 18:53:44,764 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 18:53:44,775 INFO L225 Difference]: With dead ends: 2082 [2020-10-28 18:53:44,775 INFO L226 Difference]: Without dead ends: 2077 [2020-10-28 18:53:44,777 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 11.7s TimeCoverageRelationStatistics Valid=56, Invalid=154, Unknown=0, NotChecked=0, Total=210 [2020-10-28 18:53:44,780 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2077 states. [2020-10-28 18:53:44,930 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2077 to 1547. [2020-10-28 18:53:44,931 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1547 states. [2020-10-28 18:53:44,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1547 states to 1547 states and 2138 transitions. [2020-10-28 18:53:44,937 INFO L78 Accepts]: Start accepts. Automaton has 1547 states and 2138 transitions. Word has length 60 [2020-10-28 18:53:44,937 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 18:53:44,937 INFO L481 AbstractCegarLoop]: Abstraction has 1547 states and 2138 transitions. [2020-10-28 18:53:44,937 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-28 18:53:44,937 INFO L276 IsEmpty]: Start isEmpty. Operand 1547 states and 2138 transitions. [2020-10-28 18:53:44,940 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2020-10-28 18:53:44,940 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 18:53:44,940 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 18:53:44,940 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-28 18:53:44,940 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 18:53:44,941 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 18:53:44,941 INFO L82 PathProgramCache]: Analyzing trace with hash 949159653, now seen corresponding path program 1 times [2020-10-28 18:53:44,941 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 18:53:44,942 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1161555670] [2020-10-28 18:53:44,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 18:53:44,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:53:45,032 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:53:45,148 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:53:45,234 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:53:46,027 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:53:46,540 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:53:46,881 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:53:47,178 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:53:47,828 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:53:48,262 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:53:48,524 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:53:48,969 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:53:50,007 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:53:50,007 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 68 [2020-10-28 18:53:50,007 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 11 [2020-10-28 18:53:50,007 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5010 [2020-10-28 18:53:50,007 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:53:50,007 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:53:50,007 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-28 18:53:50,008 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 18:53:50,008 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 51 [2020-10-28 18:53:50,008 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:53:53,923 WARN L193 SmtUtils]: Spent 3.65 s on a formula simplification that was a NOOP. DAG size: 529 [2020-10-28 18:53:53,925 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 18:53:53,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:53:53,938 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:53:53,955 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:53:53,956 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 18:53:53,956 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 18:53:53,957 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 20 [2020-10-28 18:53:53,957 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:53:53,957 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:53:53,958 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 18:53:53,958 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 18:53:53,958 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 18:53:53,959 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 18:53:53,986 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 18:53:53,986 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1161555670] [2020-10-28 18:53:53,986 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 18:53:53,986 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-10-28 18:53:53,987 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1392333393] [2020-10-28 18:53:53,987 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-28 18:53:53,987 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 18:53:53,988 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-28 18:53:53,988 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2020-10-28 18:53:53,988 INFO L87 Difference]: Start difference. First operand 1547 states and 2138 transitions. Second operand 9 states. [2020-10-28 18:53:57,956 WARN L193 SmtUtils]: Spent 3.78 s on a formula simplification that was a NOOP. DAG size: 538 [2020-10-28 18:54:07,276 WARN L193 SmtUtils]: Spent 3.72 s on a formula simplification that was a NOOP. DAG size: 537 [2020-10-28 18:54:16,163 WARN L193 SmtUtils]: Spent 3.86 s on a formula simplification that was a NOOP. DAG size: 538