/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --rcfgbuilder.size.of.a.code.block SequenceOfStatements --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=SHALLOWEST --traceabstraction.additional.smt.options log-additional-information=true --traceabstraction.additional.smt.options unknown-allowed=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf language data_model -i ../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.5.2.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-27 06:11:12,522 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-27 06:11:12,525 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-27 06:11:12,587 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-27 06:11:12,588 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-27 06:11:12,595 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-27 06:11:12,597 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-27 06:11:12,602 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-27 06:11:12,606 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-27 06:11:12,613 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-27 06:11:12,615 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-27 06:11:12,617 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-27 06:11:12,618 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-27 06:11:12,622 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-27 06:11:12,626 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-27 06:11:12,628 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-27 06:11:12,630 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-27 06:11:12,633 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-27 06:11:12,650 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-27 06:11:12,652 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-27 06:11:12,654 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-27 06:11:12,655 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-27 06:11:12,657 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-27 06:11:12,658 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-27 06:11:12,661 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-27 06:11:12,662 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-27 06:11:12,662 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-27 06:11:12,663 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-27 06:11:12,664 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-27 06:11:12,665 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-27 06:11:12,665 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-27 06:11:12,666 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-27 06:11:12,667 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-27 06:11:12,668 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-27 06:11:12,669 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-27 06:11:12,669 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-27 06:11:12,670 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-27 06:11:12,670 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-27 06:11:12,671 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-27 06:11:12,672 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-27 06:11:12,673 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-27 06:11:12,674 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-27 06:11:12,700 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-27 06:11:12,701 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-27 06:11:12,702 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-27 06:11:12,703 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-27 06:11:12,703 INFO L138 SettingsManager]: * Use SBE=true [2020-10-27 06:11:12,703 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-27 06:11:12,704 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-27 06:11:12,704 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-27 06:11:12,704 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-27 06:11:12,704 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-27 06:11:12,704 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-27 06:11:12,705 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-27 06:11:12,705 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-27 06:11:12,705 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-27 06:11:12,705 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-27 06:11:12,705 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-27 06:11:12,705 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-27 06:11:12,706 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-27 06:11:12,706 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-27 06:11:12,706 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-27 06:11:12,706 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-27 06:11:12,707 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-27 06:11:12,707 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-27 06:11:12,707 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-27 06:11:12,707 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-27 06:11:12,707 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-27 06:11:12,708 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-27 06:11:12,708 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-27 06:11:12,708 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-27 06:11:12,708 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SHALLOWEST;log-additional-information=true;unknown-allowed=true; [2020-10-27 06:11:13,143 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-27 06:11:13,199 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-27 06:11:13,203 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-27 06:11:13,204 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-27 06:11:13,205 INFO L275 PluginConnector]: CDTParser initialized [2020-10-27 06:11:13,207 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.5.2.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c [2020-10-27 06:11:13,286 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/49e6b5310/305809149d6e4b1fbc65f88bb976caa8/FLAG9954f5c00 [2020-10-27 06:11:14,271 INFO L306 CDTParser]: Found 1 translation units. [2020-10-27 06:11:14,272 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.5.2.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c [2020-10-27 06:11:14,311 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/49e6b5310/305809149d6e4b1fbc65f88bb976caa8/FLAG9954f5c00 [2020-10-27 06:11:14,801 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/49e6b5310/305809149d6e4b1fbc65f88bb976caa8 [2020-10-27 06:11:14,805 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-27 06:11:14,812 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-27 06:11:14,813 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-27 06:11:14,814 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-27 06:11:14,818 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-27 06:11:14,819 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 06:11:14" (1/1) ... [2020-10-27 06:11:14,823 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7ee20a4b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 06:11:14, skipping insertion in model container [2020-10-27 06:11:14,824 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 06:11:14" (1/1) ... [2020-10-27 06:11:14,833 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-27 06:11:15,022 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-27 06:11:16,526 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 06:11:16,547 INFO L203 MainTranslator]: Completed pre-run [2020-10-27 06:11:17,532 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 06:11:17,580 INFO L208 MainTranslator]: Completed translation [2020-10-27 06:11:17,581 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 06:11:17 WrapperNode [2020-10-27 06:11:17,581 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-27 06:11:17,583 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-27 06:11:17,584 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-27 06:11:17,585 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-27 06:11:17,599 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 06:11:17" (1/1) ... [2020-10-27 06:11:17,602 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 06:11:17" (1/1) ... [2020-10-27 06:11:17,673 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 06:11:17" (1/1) ... [2020-10-27 06:11:17,674 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 06:11:17" (1/1) ... [2020-10-27 06:11:17,764 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 06:11:17" (1/1) ... [2020-10-27 06:11:17,810 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 06:11:17" (1/1) ... [2020-10-27 06:11:17,828 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 06:11:17" (1/1) ... [2020-10-27 06:11:17,847 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-27 06:11:17,848 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-27 06:11:17,849 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-27 06:11:17,849 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-27 06:11:17,850 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 06:11:17" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-27 06:11:17,934 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-27 06:11:17,934 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-27 06:11:17,934 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-27 06:11:17,935 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-10-27 06:11:17,935 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-27 06:11:17,935 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-27 06:11:17,935 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-27 06:11:17,935 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-27 06:11:17,936 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-27 06:11:17,936 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-10-27 06:11:17,936 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uchar [2020-10-27 06:11:17,936 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-10-27 06:11:17,936 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2020-10-27 06:11:17,937 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-10-27 06:11:17,937 INFO L130 BoogieDeclarations]: Found specification of procedure read [2020-10-27 06:11:17,937 INFO L130 BoogieDeclarations]: Found specification of procedure write [2020-10-27 06:11:17,937 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2020-10-27 06:11:17,937 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2020-10-27 06:11:17,938 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2020-10-27 06:11:17,938 INFO L130 BoogieDeclarations]: Found specification of procedure node4 [2020-10-27 06:11:17,938 INFO L130 BoogieDeclarations]: Found specification of procedure node5 [2020-10-27 06:11:17,938 INFO L130 BoogieDeclarations]: Found specification of procedure init [2020-10-27 06:11:17,938 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-10-27 06:11:17,939 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-27 06:11:17,939 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-27 06:11:17,939 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-27 06:11:17,939 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-27 06:11:17,939 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-27 06:11:17,939 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-27 06:11:17,939 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-27 06:11:22,635 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-27 06:11:22,635 INFO L298 CfgBuilder]: Removed 0 assume(true) statements. [2020-10-27 06:11:22,640 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 06:11:22 BoogieIcfgContainer [2020-10-27 06:11:22,640 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-27 06:11:22,642 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-27 06:11:22,642 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-27 06:11:22,646 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-27 06:11:22,646 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.10 06:11:14" (1/3) ... [2020-10-27 06:11:22,647 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4b5e95bf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 06:11:22, skipping insertion in model container [2020-10-27 06:11:22,647 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 06:11:17" (2/3) ... [2020-10-27 06:11:22,648 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4b5e95bf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 06:11:22, skipping insertion in model container [2020-10-27 06:11:22,648 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 06:11:22" (3/3) ... [2020-10-27 06:11:22,650 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_opt-floodmax.5.2.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c [2020-10-27 06:11:22,662 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-27 06:11:22,671 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-27 06:11:22,686 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-27 06:11:22,762 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-27 06:11:22,763 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-27 06:11:22,763 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-27 06:11:22,763 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-27 06:11:22,763 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-27 06:11:22,763 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-27 06:11:22,763 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-27 06:11:22,764 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-27 06:11:22,817 INFO L276 IsEmpty]: Start isEmpty. Operand 1453 states. [2020-10-27 06:11:22,865 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 498 [2020-10-27 06:11:22,865 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 06:11:22,867 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 06:11:22,867 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 06:11:22,875 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 06:11:22,875 INFO L82 PathProgramCache]: Analyzing trace with hash 996821993, now seen corresponding path program 1 times [2020-10-27 06:11:22,886 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 06:11:22,886 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1776055644] [2020-10-27 06:11:22,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 06:11:23,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 06:11:23,841 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:11:24,956 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:11:26,543 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:11:27,242 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:11:27,779 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:11:28,215 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:11:28,605 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:11:28,793 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 06:11:28,793 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 505 [2020-10-27 06:11:28,793 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-27 06:11:28,793 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5250 [2020-10-27 06:11:28,796 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 06:11:28,796 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-27 06:11:28,796 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 06:11:28,797 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 246 [2020-10-27 06:11:28,797 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-27 06:11:30,474 WARN L193 SmtUtils]: Spent 1.02 s on a formula simplification that was a NOOP. DAG size: 427 [2020-10-27 06:11:30,477 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 06:11:30,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 06:11:30,500 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:11:30,524 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 06:11:30,525 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 06:11:30,525 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 06:11:30,525 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 30 [2020-10-27 06:11:30,525 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 06:11:30,525 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 06:11:30,526 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 06:11:30,526 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 06:11:30,526 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 06:11:31,152 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 06:11:31,153 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1776055644] [2020-10-27 06:11:31,155 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 06:11:31,155 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-27 06:11:31,156 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2071394239] [2020-10-27 06:11:31,162 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-27 06:11:31,163 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 06:11:31,176 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-27 06:11:31,177 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-27 06:11:31,179 INFO L87 Difference]: Start difference. First operand 1453 states. Second operand 5 states. [2020-10-27 06:11:48,082 WARN L193 SmtUtils]: Spent 1.38 s on a formula simplification that was a NOOP. DAG size: 433 [2020-10-27 06:11:51,807 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 06:11:51,807 INFO L93 Difference]: Finished difference Result 4296 states and 7733 transitions. [2020-10-27 06:11:51,810 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-27 06:11:51,812 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 497 [2020-10-27 06:11:51,813 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 06:11:51,861 INFO L225 Difference]: With dead ends: 4296 [2020-10-27 06:11:51,861 INFO L226 Difference]: Without dead ends: 2852 [2020-10-27 06:11:51,874 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-27 06:11:51,896 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2852 states. [2020-10-27 06:11:52,127 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2852 to 2849. [2020-10-27 06:11:52,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2849 states. [2020-10-27 06:11:52,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2849 states to 2849 states and 4686 transitions. [2020-10-27 06:11:52,150 INFO L78 Accepts]: Start accepts. Automaton has 2849 states and 4686 transitions. Word has length 497 [2020-10-27 06:11:52,157 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 06:11:52,157 INFO L481 AbstractCegarLoop]: Abstraction has 2849 states and 4686 transitions. [2020-10-27 06:11:52,159 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-27 06:11:52,159 INFO L276 IsEmpty]: Start isEmpty. Operand 2849 states and 4686 transitions. [2020-10-27 06:11:52,178 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 500 [2020-10-27 06:11:52,179 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 06:11:52,179 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 06:11:52,180 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-27 06:11:52,180 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 06:11:52,181 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 06:11:52,181 INFO L82 PathProgramCache]: Analyzing trace with hash -67459316, now seen corresponding path program 1 times [2020-10-27 06:11:52,182 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 06:11:52,182 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [809911630] [2020-10-27 06:11:52,183 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 06:11:52,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 06:11:52,400 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:11:52,584 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:11:53,014 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:11:53,504 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:11:53,850 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:11:54,451 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:11:54,946 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:11:55,354 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:11:55,768 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:11:56,053 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:11:56,315 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:11:56,543 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:11:57,301 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:11:57,500 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 06:11:57,500 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 507 [2020-10-27 06:11:57,500 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 13 [2020-10-27 06:11:57,501 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5181 [2020-10-27 06:11:57,501 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 06:11:57,501 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-27 06:11:57,502 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 06:11:57,502 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 199 [2020-10-27 06:11:57,502 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 06:11:59,112 WARN L193 SmtUtils]: Spent 1.27 s on a formula simplification that was a NOOP. DAG size: 427 [2020-10-27 06:11:59,114 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 06:11:59,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 06:11:59,133 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:11:59,168 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 06:11:59,168 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 06:11:59,169 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 06:11:59,169 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 39 [2020-10-27 06:11:59,169 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 06:11:59,169 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 06:11:59,169 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 06:11:59,170 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 06:11:59,170 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 06:11:59,669 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 06:11:59,670 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [809911630] [2020-10-27 06:11:59,670 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 06:11:59,670 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-27 06:11:59,670 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [819121394] [2020-10-27 06:11:59,673 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-27 06:11:59,673 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 06:11:59,674 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-27 06:11:59,674 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-27 06:11:59,674 INFO L87 Difference]: Start difference. First operand 2849 states and 4686 transitions. Second operand 5 states. [2020-10-27 06:12:14,271 WARN L193 SmtUtils]: Spent 1.40 s on a formula simplification that was a NOOP. DAG size: 433 [2020-10-27 06:12:17,808 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 06:12:17,808 INFO L93 Difference]: Finished difference Result 8337 states and 13690 transitions. [2020-10-27 06:12:17,809 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-27 06:12:17,809 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 499 [2020-10-27 06:12:17,811 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 06:12:17,839 INFO L225 Difference]: With dead ends: 8337 [2020-10-27 06:12:17,840 INFO L226 Difference]: Without dead ends: 5570 [2020-10-27 06:12:17,847 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-27 06:12:17,855 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5570 states. [2020-10-27 06:12:18,074 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5570 to 5567. [2020-10-27 06:12:18,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5567 states. [2020-10-27 06:12:18,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5567 states to 5567 states and 9107 transitions. [2020-10-27 06:12:18,093 INFO L78 Accepts]: Start accepts. Automaton has 5567 states and 9107 transitions. Word has length 499 [2020-10-27 06:12:18,095 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 06:12:18,095 INFO L481 AbstractCegarLoop]: Abstraction has 5567 states and 9107 transitions. [2020-10-27 06:12:18,095 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-27 06:12:18,096 INFO L276 IsEmpty]: Start isEmpty. Operand 5567 states and 9107 transitions. [2020-10-27 06:12:18,115 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 502 [2020-10-27 06:12:18,116 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 06:12:18,116 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 06:12:18,117 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-27 06:12:18,117 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 06:12:18,118 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 06:12:18,119 INFO L82 PathProgramCache]: Analyzing trace with hash 237835087, now seen corresponding path program 1 times [2020-10-27 06:12:18,119 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 06:12:18,119 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [646601333] [2020-10-27 06:12:18,119 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 06:12:18,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 06:12:18,322 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:12:18,489 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:12:18,662 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:12:18,833 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:12:18,990 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:12:19,323 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:12:19,738 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:12:20,095 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:12:20,372 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:12:20,977 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:12:21,174 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:12:22,235 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:12:22,551 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:12:22,858 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:12:23,197 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:12:23,324 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 06:12:23,324 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 509 [2020-10-27 06:12:23,324 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 15 [2020-10-27 06:12:23,324 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5072 [2020-10-27 06:12:23,324 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 06:12:23,325 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-27 06:12:23,325 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 06:12:23,325 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 258 [2020-10-27 06:12:23,325 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 06:12:25,042 WARN L193 SmtUtils]: Spent 1.19 s on a formula simplification that was a NOOP. DAG size: 427 [2020-10-27 06:12:25,044 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 06:12:25,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 06:12:25,062 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:12:25,097 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 06:12:25,097 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 06:12:25,097 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 06:12:25,097 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 40 [2020-10-27 06:12:25,097 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 06:12:25,098 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 06:12:25,098 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 06:12:25,098 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 06:12:25,098 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 06:12:25,544 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 06:12:25,544 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [646601333] [2020-10-27 06:12:25,544 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 06:12:25,545 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-27 06:12:25,545 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [912167546] [2020-10-27 06:12:25,546 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-27 06:12:25,546 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 06:12:25,546 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-27 06:12:25,547 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-27 06:12:25,547 INFO L87 Difference]: Start difference. First operand 5567 states and 9107 transitions. Second operand 5 states. [2020-10-27 06:12:41,290 WARN L193 SmtUtils]: Spent 1.24 s on a formula simplification that was a NOOP. DAG size: 433 [2020-10-27 06:12:44,970 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 06:12:44,970 INFO L93 Difference]: Finished difference Result 16353 states and 26708 transitions. [2020-10-27 06:12:44,975 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-27 06:12:44,975 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 501 [2020-10-27 06:12:44,976 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 06:12:45,028 INFO L225 Difference]: With dead ends: 16353 [2020-10-27 06:12:45,028 INFO L226 Difference]: Without dead ends: 11014 [2020-10-27 06:12:45,040 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-27 06:12:45,053 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11014 states. [2020-10-27 06:12:45,635 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11014 to 11011. [2020-10-27 06:12:45,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11011 states. [2020-10-27 06:12:45,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11011 states to 11011 states and 17946 transitions. [2020-10-27 06:12:45,662 INFO L78 Accepts]: Start accepts. Automaton has 11011 states and 17946 transitions. Word has length 501 [2020-10-27 06:12:45,662 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 06:12:45,662 INFO L481 AbstractCegarLoop]: Abstraction has 11011 states and 17946 transitions. [2020-10-27 06:12:45,664 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-27 06:12:45,664 INFO L276 IsEmpty]: Start isEmpty. Operand 11011 states and 17946 transitions. [2020-10-27 06:12:45,699 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 506 [2020-10-27 06:12:45,700 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 06:12:45,700 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 06:12:45,701 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-27 06:12:45,701 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 06:12:45,702 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 06:12:45,702 INFO L82 PathProgramCache]: Analyzing trace with hash -770559034, now seen corresponding path program 1 times [2020-10-27 06:12:45,702 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 06:12:45,703 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1282736030] [2020-10-27 06:12:45,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 06:12:45,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 06:12:45,803 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:12:45,872 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:12:45,991 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:12:46,160 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:12:46,321 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:12:46,476 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:12:46,768 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:12:47,073 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:12:47,414 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:12:47,601 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:12:48,421 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:12:48,853 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:12:50,863 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 06:12:50,864 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 513 [2020-10-27 06:12:50,864 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 12 [2020-10-27 06:12:50,864 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5095 [2020-10-27 06:12:50,864 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 06:12:50,864 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-27 06:12:50,865 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 06:12:50,865 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 200 [2020-10-27 06:12:50,865 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 06:12:52,438 WARN L193 SmtUtils]: Spent 1.27 s on a formula simplification that was a NOOP. DAG size: 427 [2020-10-27 06:12:52,440 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 06:12:52,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 06:12:52,458 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:12:52,479 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 06:12:52,480 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 06:12:52,480 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 06:12:52,480 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 26 [2020-10-27 06:12:52,480 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 06:12:52,480 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 06:12:52,480 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 06:12:52,480 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 06:12:52,481 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 06:12:52,864 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 06:12:52,864 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1282736030] [2020-10-27 06:12:52,864 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 06:12:52,865 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-27 06:12:52,865 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1858795638] [2020-10-27 06:12:52,866 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-27 06:12:52,866 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 06:12:52,866 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-27 06:12:52,867 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-27 06:12:52,867 INFO L87 Difference]: Start difference. First operand 11011 states and 17946 transitions. Second operand 5 states. [2020-10-27 06:13:08,831 WARN L193 SmtUtils]: Spent 1.31 s on a formula simplification that was a NOOP. DAG size: 433 [2020-10-27 06:13:12,864 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 06:13:12,865 INFO L93 Difference]: Finished difference Result 32465 states and 52844 transitions. [2020-10-27 06:13:12,866 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-27 06:13:12,866 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 505 [2020-10-27 06:13:12,867 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 06:13:12,939 INFO L225 Difference]: With dead ends: 32465 [2020-10-27 06:13:12,939 INFO L226 Difference]: Without dead ends: 21790 [2020-10-27 06:13:12,968 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-27 06:13:12,994 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21790 states. [2020-10-27 06:13:14,056 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21790 to 21787. [2020-10-27 06:13:14,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21787 states. [2020-10-27 06:13:14,100 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21787 states to 21787 states and 35366 transitions. [2020-10-27 06:13:14,100 INFO L78 Accepts]: Start accepts. Automaton has 21787 states and 35366 transitions. Word has length 505 [2020-10-27 06:13:14,101 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 06:13:14,101 INFO L481 AbstractCegarLoop]: Abstraction has 21787 states and 35366 transitions. [2020-10-27 06:13:14,101 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-27 06:13:14,101 INFO L276 IsEmpty]: Start isEmpty. Operand 21787 states and 35366 transitions. [2020-10-27 06:13:14,151 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 509 [2020-10-27 06:13:14,152 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 06:13:14,152 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 06:13:14,152 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-27 06:13:14,153 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 06:13:14,153 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 06:13:14,153 INFO L82 PathProgramCache]: Analyzing trace with hash 1321890710, now seen corresponding path program 1 times [2020-10-27 06:13:14,153 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 06:13:14,154 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [404042244] [2020-10-27 06:13:14,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 06:13:14,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 06:13:14,232 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:13:14,295 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:13:14,395 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:13:14,540 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:13:14,746 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:13:15,147 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:13:15,771 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:13:15,977 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:13:16,182 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:13:16,372 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:13:16,769 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:13:17,028 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:13:18,930 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:13:19,176 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:13:19,282 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 06:13:19,283 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 516 [2020-10-27 06:13:19,283 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 14 [2020-10-27 06:13:19,283 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5078 [2020-10-27 06:13:19,283 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 06:13:19,283 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-27 06:13:19,287 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 06:13:19,287 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 215 [2020-10-27 06:13:19,287 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-10-27 06:13:20,842 WARN L193 SmtUtils]: Spent 1.28 s on a formula simplification that was a NOOP. DAG size: 427 [2020-10-27 06:13:20,844 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 06:13:20,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 06:13:20,860 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:13:20,874 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 06:13:20,875 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 06:13:20,875 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 06:13:20,875 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 19 [2020-10-27 06:13:20,875 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 06:13:20,875 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 06:13:20,875 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 06:13:20,875 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 06:13:20,876 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 06:13:21,219 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 06:13:21,220 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [404042244] [2020-10-27 06:13:21,220 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 06:13:21,220 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-27 06:13:21,220 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1008913089] [2020-10-27 06:13:21,221 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-27 06:13:21,221 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 06:13:21,222 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-27 06:13:21,222 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-27 06:13:21,222 INFO L87 Difference]: Start difference. First operand 21787 states and 35366 transitions. Second operand 5 states. [2020-10-27 06:13:36,993 WARN L193 SmtUtils]: Spent 1.33 s on a formula simplification that was a NOOP. DAG size: 433 [2020-10-27 06:13:40,928 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 06:13:40,929 INFO L93 Difference]: Finished difference Result 63905 states and 103538 transitions. [2020-10-27 06:13:40,931 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-27 06:13:40,931 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 508 [2020-10-27 06:13:40,931 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 06:13:41,025 INFO L225 Difference]: With dead ends: 63905 [2020-10-27 06:13:41,025 INFO L226 Difference]: Without dead ends: 42718 [2020-10-27 06:13:41,080 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-27 06:13:41,130 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42718 states. [2020-10-27 06:13:43,453 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42718 to 42715. [2020-10-27 06:13:43,454 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42715 states. [2020-10-27 06:13:43,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42715 states to 42715 states and 68910 transitions. [2020-10-27 06:13:43,511 INFO L78 Accepts]: Start accepts. Automaton has 42715 states and 68910 transitions. Word has length 508 [2020-10-27 06:13:43,511 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 06:13:43,511 INFO L481 AbstractCegarLoop]: Abstraction has 42715 states and 68910 transitions. [2020-10-27 06:13:43,511 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-27 06:13:43,511 INFO L276 IsEmpty]: Start isEmpty. Operand 42715 states and 68910 transitions. [2020-10-27 06:13:43,636 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 513 [2020-10-27 06:13:43,636 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 06:13:43,637 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 06:13:43,637 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-27 06:13:43,637 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 06:13:43,638 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 06:13:43,638 INFO L82 PathProgramCache]: Analyzing trace with hash -757580657, now seen corresponding path program 1 times [2020-10-27 06:13:43,638 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 06:13:43,638 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2078176920] [2020-10-27 06:13:43,639 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 06:13:43,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 06:13:43,721 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:13:43,781 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:13:43,885 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:13:43,994 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:13:44,326 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:13:44,422 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:13:44,524 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:13:44,639 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:13:44,774 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:13:44,885 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:13:44,986 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:13:48,106 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:13:48,477 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:13:48,723 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 06:13:48,723 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 520 [2020-10-27 06:13:48,724 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 13 [2020-10-27 06:13:48,724 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5031 [2020-10-27 06:13:48,724 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 06:13:48,724 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-27 06:13:48,724 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 06:13:48,724 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 214 [2020-10-27 06:13:48,724 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 06:13:50,217 WARN L193 SmtUtils]: Spent 1.29 s on a formula simplification that was a NOOP. DAG size: 427 [2020-10-27 06:13:50,219 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 06:13:50,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 06:13:50,235 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:13:50,248 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 06:13:50,248 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 06:13:50,249 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 06:13:50,249 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 17 [2020-10-27 06:13:50,249 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 06:13:50,249 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 06:13:50,249 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 06:13:50,249 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 06:13:50,249 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 06:13:50,554 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 06:13:50,555 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2078176920] [2020-10-27 06:13:50,555 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 06:13:50,555 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-27 06:13:50,555 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1213035474] [2020-10-27 06:13:50,556 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-27 06:13:50,556 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 06:13:50,557 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-27 06:13:50,557 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-27 06:13:50,557 INFO L87 Difference]: Start difference. First operand 42715 states and 68910 transitions. Second operand 5 states. [2020-10-27 06:14:08,465 WARN L193 SmtUtils]: Spent 1.33 s on a formula simplification that was a NOOP. DAG size: 433 [2020-10-27 06:14:12,870 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 06:14:12,870 INFO L93 Difference]: Finished difference Result 126585 states and 204030 transitions. [2020-10-27 06:14:12,871 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-27 06:14:12,871 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 512 [2020-10-27 06:14:12,872 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 06:14:13,034 INFO L225 Difference]: With dead ends: 126585 [2020-10-27 06:14:13,034 INFO L226 Difference]: Without dead ends: 84248 [2020-10-27 06:14:13,112 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-27 06:14:13,187 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84248 states. [2020-10-27 06:14:17,868 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84248 to 84245. [2020-10-27 06:14:17,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84245 states. [2020-10-27 06:14:18,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84245 states to 84245 states and 135194 transitions. [2020-10-27 06:14:18,005 INFO L78 Accepts]: Start accepts. Automaton has 84245 states and 135194 transitions. Word has length 512 [2020-10-27 06:14:18,006 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 06:14:18,006 INFO L481 AbstractCegarLoop]: Abstraction has 84245 states and 135194 transitions. [2020-10-27 06:14:18,006 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-27 06:14:18,006 INFO L276 IsEmpty]: Start isEmpty. Operand 84245 states and 135194 transitions. [2020-10-27 06:14:18,287 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 516 [2020-10-27 06:14:18,287 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 06:14:18,287 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 06:14:18,288 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-27 06:14:18,288 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 06:14:18,288 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 06:14:18,289 INFO L82 PathProgramCache]: Analyzing trace with hash 1855551972, now seen corresponding path program 1 times [2020-10-27 06:14:18,289 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 06:14:18,289 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1029959854] [2020-10-27 06:14:18,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 06:14:18,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 06:14:18,494 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:14:18,534 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:14:18,588 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:14:18,654 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:14:18,726 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:14:18,795 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:14:18,863 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:14:18,969 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:14:19,055 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:14:19,152 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:14:19,228 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:14:21,857 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:14:23,372 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 06:14:23,372 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 523 [2020-10-27 06:14:23,372 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 12 [2020-10-27 06:14:23,372 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5033 [2020-10-27 06:14:23,372 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 06:14:23,373 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-27 06:14:23,373 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 06:14:23,373 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 216 [2020-10-27 06:14:23,373 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 06:14:24,962 WARN L193 SmtUtils]: Spent 1.30 s on a formula simplification that was a NOOP. DAG size: 427 [2020-10-27 06:14:24,967 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 06:14:24,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 06:14:24,990 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:14:25,004 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 06:14:25,004 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 06:14:25,004 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 06:14:25,004 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 18 [2020-10-27 06:14:25,004 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 06:14:25,005 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 06:14:25,005 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 06:14:25,005 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 06:14:25,005 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 06:14:25,362 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 06:14:25,363 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1029959854] [2020-10-27 06:14:25,363 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 06:14:25,363 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-27 06:14:25,363 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [507400401] [2020-10-27 06:14:25,364 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-27 06:14:25,364 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 06:14:25,365 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-27 06:14:25,365 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-27 06:14:25,365 INFO L87 Difference]: Start difference. First operand 84245 states and 135194 transitions. Second operand 5 states. [2020-10-27 06:14:48,231 WARN L193 SmtUtils]: Spent 1.39 s on a formula simplification that was a NOOP. DAG size: 433