/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --rcfgbuilder.size.of.a.code.block SequenceOfStatements --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=DEEPEST --traceabstraction.additional.smt.options log-additional-information=true --traceabstraction.additional.smt.options unknown-allowed=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf language data_model -i ../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.5.3.ufo.BOUNDED-10.pals.c.v+lhb-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-28 00:40:53,520 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-28 00:40:53,523 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-28 00:40:53,577 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-28 00:40:53,578 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-28 00:40:53,584 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-28 00:40:53,587 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-28 00:40:53,591 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-28 00:40:53,594 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-28 00:40:53,600 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-28 00:40:53,601 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-28 00:40:53,603 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-28 00:40:53,603 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-28 00:40:53,606 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-28 00:40:53,609 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-28 00:40:53,610 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-28 00:40:53,612 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-28 00:40:53,616 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-28 00:40:53,624 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-28 00:40:53,631 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-28 00:40:53,634 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-28 00:40:53,636 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-28 00:40:53,637 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-28 00:40:53,640 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-28 00:40:53,648 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-28 00:40:53,648 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-28 00:40:53,649 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-28 00:40:53,650 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-28 00:40:53,650 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-28 00:40:53,651 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-28 00:40:53,652 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-28 00:40:53,652 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-28 00:40:53,653 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-28 00:40:53,654 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-28 00:40:53,655 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-28 00:40:53,655 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-28 00:40:53,656 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-28 00:40:53,656 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-28 00:40:53,657 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-28 00:40:53,658 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-28 00:40:53,658 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-28 00:40:53,659 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-28 00:40:53,686 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-28 00:40:53,686 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-28 00:40:53,687 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-28 00:40:53,688 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-28 00:40:53,688 INFO L138 SettingsManager]: * Use SBE=true [2020-10-28 00:40:53,688 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-28 00:40:53,688 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-28 00:40:53,689 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-28 00:40:53,689 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-28 00:40:53,689 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-28 00:40:53,689 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-28 00:40:53,689 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-28 00:40:53,690 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-28 00:40:53,690 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-28 00:40:53,690 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-28 00:40:53,690 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-28 00:40:53,690 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-28 00:40:53,690 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-28 00:40:53,691 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-28 00:40:53,691 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-28 00:40:53,691 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-28 00:40:53,691 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-28 00:40:53,691 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-28 00:40:53,692 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-28 00:40:53,692 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-28 00:40:53,692 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-28 00:40:53,692 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-28 00:40:53,692 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-28 00:40:53,693 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-28 00:40:53,693 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=DEEPEST;log-additional-information=true;unknown-allowed=true; [2020-10-28 00:40:54,082 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-28 00:40:54,116 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-28 00:40:54,120 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-28 00:40:54,121 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-28 00:40:54,122 INFO L275 PluginConnector]: CDTParser initialized [2020-10-28 00:40:54,123 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.5.3.ufo.BOUNDED-10.pals.c.v+lhb-reducer.c [2020-10-28 00:40:54,215 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/73f5e9e4e/c29e0f8f719e43f0815412ed9eabf9e9/FLAG43cd6e0eb [2020-10-28 00:40:55,510 INFO L306 CDTParser]: Found 1 translation units. [2020-10-28 00:40:55,511 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.5.3.ufo.BOUNDED-10.pals.c.v+lhb-reducer.c [2020-10-28 00:40:55,570 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/73f5e9e4e/c29e0f8f719e43f0815412ed9eabf9e9/FLAG43cd6e0eb [2020-10-28 00:40:55,823 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/73f5e9e4e/c29e0f8f719e43f0815412ed9eabf9e9 [2020-10-28 00:40:55,826 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-28 00:40:55,832 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-28 00:40:55,834 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-28 00:40:55,834 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-28 00:40:55,838 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-28 00:40:55,840 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 12:40:55" (1/1) ... [2020-10-28 00:40:55,844 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@24d00e1a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 12:40:55, skipping insertion in model container [2020-10-28 00:40:55,845 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 12:40:55" (1/1) ... [2020-10-28 00:40:55,853 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-28 00:40:56,389 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-28 00:41:00,792 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-28 00:41:00,808 INFO L203 MainTranslator]: Completed pre-run [2020-10-28 00:41:04,105 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-28 00:41:04,142 INFO L208 MainTranslator]: Completed translation [2020-10-28 00:41:04,143 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 12:41:04 WrapperNode [2020-10-28 00:41:04,143 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-28 00:41:04,145 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-28 00:41:04,145 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-28 00:41:04,145 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-28 00:41:04,160 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 12:41:04" (1/1) ... [2020-10-28 00:41:04,161 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 12:41:04" (1/1) ... [2020-10-28 00:41:04,261 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 12:41:04" (1/1) ... [2020-10-28 00:41:04,262 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 12:41:04" (1/1) ... [2020-10-28 00:41:04,435 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 12:41:04" (1/1) ... [2020-10-28 00:41:04,661 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 12:41:04" (1/1) ... [2020-10-28 00:41:04,739 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 12:41:04" (1/1) ... [2020-10-28 00:41:04,845 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-28 00:41:04,847 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-28 00:41:04,847 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-28 00:41:04,847 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-28 00:41:04,848 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 12:41:04" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-28 00:41:05,006 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-28 00:41:05,007 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-28 00:41:05,007 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-28 00:41:05,007 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-10-28 00:41:05,008 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-28 00:41:05,008 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-28 00:41:05,008 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-28 00:41:05,008 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-28 00:41:05,008 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-28 00:41:05,008 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-10-28 00:41:05,009 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-10-28 00:41:05,009 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2020-10-28 00:41:05,009 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-10-28 00:41:05,010 INFO L130 BoogieDeclarations]: Found specification of procedure read [2020-10-28 00:41:05,010 INFO L130 BoogieDeclarations]: Found specification of procedure write [2020-10-28 00:41:05,011 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2020-10-28 00:41:05,011 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2020-10-28 00:41:05,011 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2020-10-28 00:41:05,011 INFO L130 BoogieDeclarations]: Found specification of procedure node4 [2020-10-28 00:41:05,011 INFO L130 BoogieDeclarations]: Found specification of procedure node5 [2020-10-28 00:41:05,011 INFO L130 BoogieDeclarations]: Found specification of procedure init [2020-10-28 00:41:05,012 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-10-28 00:41:05,012 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-28 00:41:05,012 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-28 00:41:05,012 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-28 00:41:05,012 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-28 00:41:05,012 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-28 00:41:05,012 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-28 00:41:05,013 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-28 00:41:21,992 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-28 00:41:21,993 INFO L298 CfgBuilder]: Removed 0 assume(true) statements. [2020-10-28 00:41:22,002 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 12:41:22 BoogieIcfgContainer [2020-10-28 00:41:22,002 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-28 00:41:22,004 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-28 00:41:22,004 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-28 00:41:22,008 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-28 00:41:22,008 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.10 12:40:55" (1/3) ... [2020-10-28 00:41:22,009 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5409b1c0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 12:41:22, skipping insertion in model container [2020-10-28 00:41:22,009 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 12:41:04" (2/3) ... [2020-10-28 00:41:22,010 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5409b1c0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 12:41:22, skipping insertion in model container [2020-10-28 00:41:22,010 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 12:41:22" (3/3) ... [2020-10-28 00:41:22,012 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_opt-floodmax.5.3.ufo.BOUNDED-10.pals.c.v+lhb-reducer.c [2020-10-28 00:41:22,024 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-28 00:41:22,032 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-28 00:41:22,047 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-28 00:41:22,096 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-28 00:41:22,096 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-28 00:41:22,096 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-28 00:41:22,096 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-28 00:41:22,097 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-28 00:41:22,097 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-28 00:41:22,097 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-28 00:41:22,097 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-28 00:41:22,201 INFO L276 IsEmpty]: Start isEmpty. Operand 6858 states. [2020-10-28 00:41:22,257 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 394 [2020-10-28 00:41:22,257 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 00:41:22,259 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] [2020-10-28 00:41:22,259 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 00:41:22,266 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 00:41:22,266 INFO L82 PathProgramCache]: Analyzing trace with hash -284146511, now seen corresponding path program 1 times [2020-10-28 00:41:22,276 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 00:41:22,276 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [854205513] [2020-10-28 00:41:22,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 00:41:22,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:41:23,225 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:41:23,546 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:41:24,167 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:41:24,720 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:41:25,274 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:41:25,851 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:41:26,542 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:41:27,592 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:41:28,097 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:41:28,098 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 401 [2020-10-28 00:41:28,098 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-28 00:41:28,098 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5109 [2020-10-28 00:41:28,101 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:41:28,101 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 00:41:28,101 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 219 [2020-10-28 00:41:28,101 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 47 [2020-10-28 00:41:28,102 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-28 00:41:30,871 WARN L193 SmtUtils]: Spent 2.14 s on a formula simplification that was a NOOP. DAG size: 520 [2020-10-28 00:41:30,874 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 00:41:30,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:41:30,914 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:41:30,952 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:41:30,952 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 00:41:30,953 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 00:41:30,953 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 48 [2020-10-28 00:41:30,953 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:41:30,953 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 00:41:30,953 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 00:41:30,954 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 00:41:30,954 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 00:41:31,529 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 00:41:31,531 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [854205513] [2020-10-28 00:41:31,534 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 00:41:31,534 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 00:41:31,535 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [677307080] [2020-10-28 00:41:31,544 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 00:41:31,544 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 00:41:31,565 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 00:41:31,566 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 00:41:31,569 INFO L87 Difference]: Start difference. First operand 6858 states. Second operand 4 states. [2020-10-28 00:41:33,523 WARN L193 SmtUtils]: Spent 1.82 s on a formula simplification that was a NOOP. DAG size: 528 [2020-10-28 00:42:51,210 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 00:42:51,210 INFO L93 Difference]: Finished difference Result 13908 states and 24073 transitions. [2020-10-28 00:42:51,211 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 00:42:51,213 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 393 [2020-10-28 00:42:51,220 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 00:42:51,297 INFO L225 Difference]: With dead ends: 13908 [2020-10-28 00:42:51,297 INFO L226 Difference]: Without dead ends: 9263 [2020-10-28 00:42:51,317 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-28 00:42:51,358 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9263 states. [2020-10-28 00:42:51,739 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9263 to 8948. [2020-10-28 00:42:51,740 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8948 states. [2020-10-28 00:42:51,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8948 states to 8948 states and 14829 transitions. [2020-10-28 00:42:51,794 INFO L78 Accepts]: Start accepts. Automaton has 8948 states and 14829 transitions. Word has length 393 [2020-10-28 00:42:51,800 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 00:42:51,801 INFO L481 AbstractCegarLoop]: Abstraction has 8948 states and 14829 transitions. [2020-10-28 00:42:51,801 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 00:42:51,801 INFO L276 IsEmpty]: Start isEmpty. Operand 8948 states and 14829 transitions. [2020-10-28 00:42:51,843 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 394 [2020-10-28 00:42:51,843 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 00:42:51,844 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] [2020-10-28 00:42:51,844 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-28 00:42:51,844 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 00:42:51,845 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 00:42:51,845 INFO L82 PathProgramCache]: Analyzing trace with hash -136749227, now seen corresponding path program 1 times [2020-10-28 00:42:51,846 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 00:42:51,847 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1129095958] [2020-10-28 00:42:51,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 00:42:51,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:42:52,092 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:42:52,302 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:42:52,644 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:42:53,394 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:42:53,860 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:42:54,205 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:42:54,673 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:42:55,208 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:42:55,576 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:42:55,995 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:42:56,379 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:42:57,068 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:42:57,068 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 401 [2020-10-28 00:42:57,068 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 11 [2020-10-28 00:42:57,068 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5076 [2020-10-28 00:42:57,069 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:42:57,069 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 00:42:57,069 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 212 [2020-10-28 00:42:57,069 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 46 [2020-10-28 00:42:57,069 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:42:59,328 WARN L193 SmtUtils]: Spent 2.01 s on a formula simplification that was a NOOP. DAG size: 520 [2020-10-28 00:42:59,329 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 00:42:59,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:42:59,350 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:42:59,368 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:42:59,368 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 00:42:59,368 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 00:42:59,368 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 23 [2020-10-28 00:42:59,369 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:42:59,369 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 00:42:59,369 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 00:42:59,369 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 00:42:59,369 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:42:59,611 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 00:42:59,612 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1129095958] [2020-10-28 00:42:59,612 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 00:42:59,612 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 00:42:59,612 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1973861436] [2020-10-28 00:42:59,614 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 00:42:59,615 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 00:42:59,615 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 00:42:59,615 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 00:42:59,615 INFO L87 Difference]: Start difference. First operand 8948 states and 14829 transitions. Second operand 4 states. [2020-10-28 00:44:11,339 WARN L193 SmtUtils]: Spent 1.90 s on a formula simplification that was a NOOP. DAG size: 526 [2020-10-28 00:44:14,809 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 00:44:14,809 INFO L93 Difference]: Finished difference Result 18824 states and 31461 transitions. [2020-10-28 00:44:14,811 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 00:44:14,811 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 393 [2020-10-28 00:44:14,812 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 00:44:14,872 INFO L225 Difference]: With dead ends: 18824 [2020-10-28 00:44:14,873 INFO L226 Difference]: Without dead ends: 12094 [2020-10-28 00:44:14,888 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-28 00:44:14,909 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12094 states. [2020-10-28 00:44:15,268 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12094 to 11961. [2020-10-28 00:44:15,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11961 states. [2020-10-28 00:44:15,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11961 states to 11961 states and 19857 transitions. [2020-10-28 00:44:15,295 INFO L78 Accepts]: Start accepts. Automaton has 11961 states and 19857 transitions. Word has length 393 [2020-10-28 00:44:15,296 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 00:44:15,296 INFO L481 AbstractCegarLoop]: Abstraction has 11961 states and 19857 transitions. [2020-10-28 00:44:15,296 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 00:44:15,297 INFO L276 IsEmpty]: Start isEmpty. Operand 11961 states and 19857 transitions. [2020-10-28 00:44:15,330 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 394 [2020-10-28 00:44:15,330 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 00:44:15,331 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] [2020-10-28 00:44:15,331 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-28 00:44:15,331 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 00:44:15,331 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 00:44:15,332 INFO L82 PathProgramCache]: Analyzing trace with hash -692239406, now seen corresponding path program 1 times [2020-10-28 00:44:15,332 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 00:44:15,332 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1976063234] [2020-10-28 00:44:15,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 00:44:15,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:44:15,494 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:44:15,644 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:44:15,868 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:44:16,179 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:44:16,480 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:44:16,729 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:44:17,144 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:44:17,566 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:44:17,906 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:44:18,227 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:44:18,543 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:44:20,432 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:44:20,433 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 401 [2020-10-28 00:44:20,433 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 11 [2020-10-28 00:44:20,433 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5008 [2020-10-28 00:44:20,433 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:44:20,433 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 00:44:20,433 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 255 [2020-10-28 00:44:20,434 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 49 [2020-10-28 00:44:20,434 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:44:22,532 WARN L193 SmtUtils]: Spent 1.83 s on a formula simplification that was a NOOP. DAG size: 520 [2020-10-28 00:44:22,536 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 00:44:22,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:44:22,562 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:44:22,584 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:44:22,585 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 00:44:22,585 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 00:44:22,585 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 28 [2020-10-28 00:44:22,585 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:44:22,586 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 00:44:22,586 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 00:44:22,586 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 00:44:22,586 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:44:22,816 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 00:44:22,816 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1976063234] [2020-10-28 00:44:22,816 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 00:44:22,817 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 00:44:22,817 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [983979164] [2020-10-28 00:44:22,818 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 00:44:22,818 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 00:44:22,818 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 00:44:22,819 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 00:44:22,819 INFO L87 Difference]: Start difference. First operand 11961 states and 19857 transitions. Second operand 4 states. [2020-10-28 00:44:24,877 WARN L193 SmtUtils]: Spent 1.97 s on a formula simplification that was a NOOP. DAG size: 528