/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.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 SingleStatement --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=WIDESTAMONGSMALL --traceabstraction.additional.smt.options tolerance=1.0 --traceabstraction.additional.smt.options log-additional-information=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.4.1.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-c90d42b [2020-09-25 09:13:44,693 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-25 09:13:44,697 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-25 09:13:44,722 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-25 09:13:44,723 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-25 09:13:44,724 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-25 09:13:44,725 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-25 09:13:44,727 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-25 09:13:44,729 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-25 09:13:44,730 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-25 09:13:44,731 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-25 09:13:44,733 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-25 09:13:44,733 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-25 09:13:44,734 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-25 09:13:44,735 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-25 09:13:44,736 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-25 09:13:44,737 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-25 09:13:44,738 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-25 09:13:44,740 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-25 09:13:44,742 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-25 09:13:44,749 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-25 09:13:44,751 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-25 09:13:44,752 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-25 09:13:44,753 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-25 09:13:44,756 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-09-25 09:13:44,756 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-09-25 09:13:44,756 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-09-25 09:13:44,757 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-09-25 09:13:44,758 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-09-25 09:13:44,759 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-09-25 09:13:44,759 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-09-25 09:13:44,760 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-09-25 09:13:44,761 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-09-25 09:13:44,761 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-09-25 09:13:44,763 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-09-25 09:13:44,763 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-09-25 09:13:44,764 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-09-25 09:13:44,764 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-09-25 09:13:44,764 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-25 09:13:44,765 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-25 09:13:44,766 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-25 09:13:44,767 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-09-25 09:13:44,793 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-25 09:13:44,793 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-25 09:13:44,794 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-09-25 09:13:44,794 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-09-25 09:13:44,795 INFO L138 SettingsManager]: * Use SBE=true [2020-09-25 09:13:44,795 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-25 09:13:44,795 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-25 09:13:44,795 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-25 09:13:44,796 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-25 09:13:44,796 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-25 09:13:44,796 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-25 09:13:44,796 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-25 09:13:44,796 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-25 09:13:44,797 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-25 09:13:44,797 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-25 09:13:44,797 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-25 09:13:44,797 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-25 09:13:44,797 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-25 09:13:44,798 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-09-25 09:13:44,798 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-25 09:13:44,798 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-25 09:13:44,798 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-25 09:13:44,798 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-25 09:13:44,799 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-09-25 09:13:44,799 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-09-25 09:13:44,799 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-09-25 09:13:44,799 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-09-25 09:13:44,799 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-25 09:13:44,800 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-09-25 09:13:44,800 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode 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 -> SingleStatement Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=1.0;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=1.0;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=1.0;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=1.0;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=1.0;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=1.0;log-additional-information=true; [2020-09-25 09:13:45,294 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-25 09:13:45,312 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-25 09:13:45,317 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-25 09:13:45,319 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-25 09:13:45,319 INFO L275 PluginConnector]: CDTParser initialized [2020-09-25 09:13:45,321 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.4.1.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c [2020-09-25 09:13:45,414 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/e1ee28dcf/34d781a909b74dd9bdba1ba22225eba3/FLAG0be6aa188 [2020-09-25 09:13:46,138 INFO L306 CDTParser]: Found 1 translation units. [2020-09-25 09:13:46,139 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.4.1.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c [2020-09-25 09:13:46,175 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/e1ee28dcf/34d781a909b74dd9bdba1ba22225eba3/FLAG0be6aa188 [2020-09-25 09:13:46,325 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/e1ee28dcf/34d781a909b74dd9bdba1ba22225eba3 [2020-09-25 09:13:46,338 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-25 09:13:46,343 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-25 09:13:46,344 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-25 09:13:46,345 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-25 09:13:46,349 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-25 09:13:46,350 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.09 09:13:46" (1/1) ... [2020-09-25 09:13:46,355 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@145c9163 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 09:13:46, skipping insertion in model container [2020-09-25 09:13:46,355 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.09 09:13:46" (1/1) ... [2020-09-25 09:13:46,365 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-25 09:13:46,470 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-25 09:13:47,593 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-25 09:13:47,610 INFO L203 MainTranslator]: Completed pre-run [2020-09-25 09:13:48,556 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-25 09:13:48,588 INFO L208 MainTranslator]: Completed translation [2020-09-25 09:13:48,589 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 09:13:48 WrapperNode [2020-09-25 09:13:48,589 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-25 09:13:48,590 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-25 09:13:48,590 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-25 09:13:48,590 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-25 09:13:48,605 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 09:13:48" (1/1) ... [2020-09-25 09:13:48,605 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 09:13:48" (1/1) ... [2020-09-25 09:13:48,633 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 09:13:48" (1/1) ... [2020-09-25 09:13:48,634 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 09:13:48" (1/1) ... [2020-09-25 09:13:48,691 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 09:13:48" (1/1) ... [2020-09-25 09:13:48,727 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 09:13:48" (1/1) ... [2020-09-25 09:13:48,741 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 09:13:48" (1/1) ... [2020-09-25 09:13:48,760 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-25 09:13:48,760 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-25 09:13:48,760 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-25 09:13:48,761 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-25 09:13:48,764 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 09:13:48" (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 [2020-09-25 09:13:48,852 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-25 09:13:48,852 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-25 09:13:48,853 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-09-25 09:13:48,853 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-25 09:13:48,853 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-25 09:13:48,853 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-09-25 09:13:48,854 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uchar [2020-09-25 09:13:48,855 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-09-25 09:13:48,855 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2020-09-25 09:13:48,855 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-09-25 09:13:48,856 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-09-25 09:13:48,856 INFO L130 BoogieDeclarations]: Found specification of procedure read [2020-09-25 09:13:48,856 INFO L130 BoogieDeclarations]: Found specification of procedure write [2020-09-25 09:13:48,856 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2020-09-25 09:13:48,856 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2020-09-25 09:13:48,857 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2020-09-25 09:13:48,857 INFO L130 BoogieDeclarations]: Found specification of procedure node4 [2020-09-25 09:13:48,858 INFO L130 BoogieDeclarations]: Found specification of procedure init [2020-09-25 09:13:48,858 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-09-25 09:13:48,858 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-25 09:13:48,858 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-25 09:13:48,859 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-25 09:13:51,892 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-25 09:13:51,893 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-09-25 09:13:51,919 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.09 09:13:51 BoogieIcfgContainer [2020-09-25 09:13:51,919 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-25 09:13:51,923 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-25 09:13:51,923 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-25 09:13:51,927 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-25 09:13:51,927 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.09 09:13:46" (1/3) ... [2020-09-25 09:13:51,929 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@222aa724 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.09 09:13:51, skipping insertion in model container [2020-09-25 09:13:51,929 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 09:13:48" (2/3) ... [2020-09-25 09:13:51,930 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@222aa724 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.09 09:13:51, skipping insertion in model container [2020-09-25 09:13:51,930 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.09 09:13:51" (3/3) ... [2020-09-25 09:13:51,932 INFO L109 eAbstractionObserver]: Analyzing ICFG pals_opt-floodmax.4.1.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c [2020-09-25 09:13:51,946 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-25 09:13:51,961 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-25 09:13:51,988 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-09-25 09:13:52,028 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-25 09:13:52,028 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-25 09:13:52,029 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-09-25 09:13:52,029 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-25 09:13:52,029 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-25 09:13:52,029 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-25 09:13:52,029 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-25 09:13:52,029 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-25 09:13:52,132 INFO L276 IsEmpty]: Start isEmpty. Operand 1994 states. [2020-09-25 09:13:52,189 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 909 [2020-09-25 09:13:52,190 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 09:13:52,192 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 09:13:52,193 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 09:13:52,201 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 09:13:52,202 INFO L82 PathProgramCache]: Analyzing trace with hash -2948384, now seen corresponding path program 1 times [2020-09-25 09:13:52,215 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 09:13:52,216 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [360520880] [2020-09-25 09:13:52,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 09:13:53,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 09:13:53,650 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:13:54,355 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:13:54,955 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:13:55,467 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:13:55,832 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:13:56,179 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:13:56,554 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:13:56,816 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:13:57,444 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:13:58,345 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 09:13:58,346 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 915 [2020-09-25 09:13:58,346 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-09-25 09:13:58,346 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5077 [2020-09-25 09:13:58,350 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 09:13:58,351 FATAL L256 erpolLogProxyWrapper]: Tolerance: 1.0 [2020-09-25 09:13:58,352 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-25 09:13:58,352 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 378 [2020-09-25 09:13:58,352 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 500 [2020-09-25 09:13:58,352 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 5 [2020-09-25 09:13:59,750 WARN L193 SmtUtils]: Spent 593.00 ms on a formula simplification that was a NOOP. DAG size: 277 [2020-09-25 09:13:59,754 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 09:13:59,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 09:13:59,783 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:13:59,844 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 09:13:59,844 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 102 [2020-09-25 09:13:59,844 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 09:13:59,844 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 74 [2020-09-25 09:13:59,845 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 09:13:59,845 FATAL L256 erpolLogProxyWrapper]: Tolerance: 1.0 [2020-09-25 09:13:59,845 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 09:13:59,845 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 09:13:59,846 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 09:13:59,846 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 09:14:01,163 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 09:14:01,164 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [360520880] [2020-09-25 09:14:01,167 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-25 09:14:01,168 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-09-25 09:14:01,171 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [731951763] [2020-09-25 09:14:01,187 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-09-25 09:14:01,187 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 09:14:01,213 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-09-25 09:14:01,214 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-25 09:14:01,218 INFO L87 Difference]: Start difference. First operand 1994 states. Second operand 4 states. [2020-09-25 09:14:10,716 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 09:14:10,717 INFO L93 Difference]: Finished difference Result 3387 states and 4474 transitions. [2020-09-25 09:14:10,717 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-09-25 09:14:10,719 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 908 [2020-09-25 09:14:10,724 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 09:14:10,767 INFO L225 Difference]: With dead ends: 3387 [2020-09-25 09:14:10,767 INFO L226 Difference]: Without dead ends: 2783 [2020-09-25 09:14:10,783 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-25 09:14:10,817 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2783 states. [2020-09-25 09:14:10,953 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2783 to 2770. [2020-09-25 09:14:10,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2770 states. [2020-09-25 09:14:10,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2770 states to 2770 states and 3483 transitions. [2020-09-25 09:14:10,971 INFO L78 Accepts]: Start accepts. Automaton has 2770 states and 3483 transitions. Word has length 908 [2020-09-25 09:14:10,974 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 09:14:10,974 INFO L479 AbstractCegarLoop]: Abstraction has 2770 states and 3483 transitions. [2020-09-25 09:14:10,974 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-09-25 09:14:10,974 INFO L276 IsEmpty]: Start isEmpty. Operand 2770 states and 3483 transitions. [2020-09-25 09:14:11,010 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 909 [2020-09-25 09:14:11,011 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 09:14:11,012 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 09:14:11,012 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-25 09:14:11,013 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 09:14:11,013 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 09:14:11,013 INFO L82 PathProgramCache]: Analyzing trace with hash -4225536, now seen corresponding path program 1 times [2020-09-25 09:14:11,014 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 09:14:11,014 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [141204176] [2020-09-25 09:14:11,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 09:14:11,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 09:14:11,666 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:14:12,152 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:14:12,587 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:14:12,964 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:14:13,268 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:14:13,515 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:14:13,752 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:14:13,987 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:14:14,575 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:14:16,411 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 09:14:16,412 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 915 [2020-09-25 09:14:16,412 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-09-25 09:14:16,413 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5097 [2020-09-25 09:14:16,413 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 09:14:16,413 FATAL L256 erpolLogProxyWrapper]: Tolerance: 1.0 [2020-09-25 09:14:16,423 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-09-25 09:14:16,423 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 278 [2020-09-25 09:14:16,424 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 316 [2020-09-25 09:14:16,424 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 10 [2020-09-25 09:14:17,424 WARN L193 SmtUtils]: Spent 405.00 ms on a formula simplification that was a NOOP. DAG size: 277 [2020-09-25 09:14:17,426 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 09:14:17,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 09:14:17,462 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:14:17,543 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 09:14:17,544 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 102 [2020-09-25 09:14:17,546 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 09:14:17,547 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 97 [2020-09-25 09:14:17,547 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 09:14:17,547 FATAL L256 erpolLogProxyWrapper]: Tolerance: 1.0 [2020-09-25 09:14:17,548 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 09:14:17,548 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 09:14:17,548 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 09:14:17,549 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 09:14:19,073 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 09:14:19,073 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [141204176] [2020-09-25 09:14:19,074 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-25 09:14:19,074 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-09-25 09:14:19,074 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1969106055] [2020-09-25 09:14:19,079 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-25 09:14:19,080 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 09:14:19,080 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-25 09:14:19,080 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-09-25 09:14:19,080 INFO L87 Difference]: Start difference. First operand 2770 states and 3483 transitions. Second operand 5 states. [2020-09-25 09:14:33,343 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 09:14:33,343 INFO L93 Difference]: Finished difference Result 7600 states and 9684 transitions. [2020-09-25 09:14:33,344 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-09-25 09:14:33,344 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 908 [2020-09-25 09:14:33,346 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 09:14:33,372 INFO L225 Difference]: With dead ends: 7600 [2020-09-25 09:14:33,373 INFO L226 Difference]: Without dead ends: 5161 [2020-09-25 09:14:33,380 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-09-25 09:14:33,388 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5161 states. [2020-09-25 09:14:33,554 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5161 to 5159. [2020-09-25 09:14:33,555 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5159 states. [2020-09-25 09:14:33,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5159 states to 5159 states and 6536 transitions. [2020-09-25 09:14:33,576 INFO L78 Accepts]: Start accepts. Automaton has 5159 states and 6536 transitions. Word has length 908 [2020-09-25 09:14:33,578 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 09:14:33,578 INFO L479 AbstractCegarLoop]: Abstraction has 5159 states and 6536 transitions. [2020-09-25 09:14:33,578 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-25 09:14:33,579 INFO L276 IsEmpty]: Start isEmpty. Operand 5159 states and 6536 transitions. [2020-09-25 09:14:33,638 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 911 [2020-09-25 09:14:33,638 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 09:14:33,639 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 09:14:33,640 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-25 09:14:33,640 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 09:14:33,640 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 09:14:33,641 INFO L82 PathProgramCache]: Analyzing trace with hash 1299069350, now seen corresponding path program 1 times [2020-09-25 09:14:33,641 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 09:14:33,641 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2128890034] [2020-09-25 09:14:33,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 09:14:33,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 09:14:33,956 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:14:34,253 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:14:34,573 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:14:34,905 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:14:35,167 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:14:35,408 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:14:35,689 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:14:35,931 FATAL L256 erpolLogProxyWrapper]: Now shrinking...