/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=SMALLESTAMONGWIDE --traceabstraction.additional.smt.options tolerance=0.5 --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 14:50:16,785 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-25 14:50:16,792 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-25 14:50:16,838 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-25 14:50:16,838 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-25 14:50:16,846 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-25 14:50:16,848 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-25 14:50:16,852 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-25 14:50:16,855 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-25 14:50:16,858 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-25 14:50:16,859 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-25 14:50:16,860 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-25 14:50:16,861 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-25 14:50:16,865 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-25 14:50:16,868 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-25 14:50:16,870 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-25 14:50:16,872 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-25 14:50:16,873 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-25 14:50:16,874 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-25 14:50:16,885 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-25 14:50:16,888 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-25 14:50:16,889 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-25 14:50:16,890 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-25 14:50:16,891 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-25 14:50:16,903 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-09-25 14:50:16,904 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-09-25 14:50:16,905 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-09-25 14:50:16,906 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-09-25 14:50:16,906 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-09-25 14:50:16,916 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-09-25 14:50:16,916 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-09-25 14:50:16,917 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-09-25 14:50:16,921 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-09-25 14:50:16,922 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-09-25 14:50:16,923 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-09-25 14:50:16,923 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-09-25 14:50:16,924 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-09-25 14:50:16,924 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-09-25 14:50:16,924 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-25 14:50:16,925 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-25 14:50:16,926 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-25 14:50:16,928 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 14:50:16,969 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-25 14:50:16,969 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-25 14:50:16,970 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-09-25 14:50:16,971 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-09-25 14:50:16,971 INFO L138 SettingsManager]: * Use SBE=true [2020-09-25 14:50:16,971 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-25 14:50:16,971 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-25 14:50:16,972 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-25 14:50:16,972 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-25 14:50:16,972 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-25 14:50:16,972 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-25 14:50:16,973 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-25 14:50:16,973 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-25 14:50:16,973 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-25 14:50:16,973 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-25 14:50:16,973 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-25 14:50:16,974 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-25 14:50:16,974 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-25 14:50:16,974 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-09-25 14:50:16,974 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-25 14:50:16,974 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-25 14:50:16,975 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-25 14:50:16,975 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-25 14:50:16,975 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-09-25 14:50:16,975 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-09-25 14:50:16,976 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-09-25 14:50:16,976 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-09-25 14:50:16,976 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-25 14:50:16,976 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-09-25 14:50:16,977 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=SMALLESTAMONGWIDE;tolerance=0.5;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=SMALLESTAMONGWIDE;tolerance=0.5;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=SMALLESTAMONGWIDE;tolerance=0.5;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=SMALLESTAMONGWIDE;tolerance=0.5;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=SMALLESTAMONGWIDE;tolerance=0.5;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=SMALLESTAMONGWIDE;tolerance=0.5;log-additional-information=true; [2020-09-25 14:50:17,502 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-25 14:50:17,531 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-25 14:50:17,536 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-25 14:50:17,538 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-25 14:50:17,538 INFO L275 PluginConnector]: CDTParser initialized [2020-09-25 14:50:17,539 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.4.1.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c [2020-09-25 14:50:17,635 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/20d6c7e35/16d6a355ed53477c81efb9dde6dd2742/FLAGee82198e5 [2020-09-25 14:50:18,353 INFO L306 CDTParser]: Found 1 translation units. [2020-09-25 14:50:18,354 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.4.1.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c [2020-09-25 14:50:18,375 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/20d6c7e35/16d6a355ed53477c81efb9dde6dd2742/FLAGee82198e5 [2020-09-25 14:50:18,519 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/20d6c7e35/16d6a355ed53477c81efb9dde6dd2742 [2020-09-25 14:50:18,531 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-25 14:50:18,536 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-25 14:50:18,537 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-25 14:50:18,538 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-25 14:50:18,542 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-25 14:50:18,543 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.09 02:50:18" (1/1) ... [2020-09-25 14:50:18,547 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1a59c72f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 02:50:18, skipping insertion in model container [2020-09-25 14:50:18,548 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.09 02:50:18" (1/1) ... [2020-09-25 14:50:18,557 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-25 14:50:18,666 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-25 14:50:19,801 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-25 14:50:19,819 INFO L203 MainTranslator]: Completed pre-run [2020-09-25 14:50:20,464 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-25 14:50:20,491 INFO L208 MainTranslator]: Completed translation [2020-09-25 14:50:20,491 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 02:50:20 WrapperNode [2020-09-25 14:50:20,491 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-25 14:50:20,492 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-25 14:50:20,492 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-25 14:50:20,493 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-25 14:50:20,509 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 02:50:20" (1/1) ... [2020-09-25 14:50:20,511 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 02:50:20" (1/1) ... [2020-09-25 14:50:20,538 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 02:50:20" (1/1) ... [2020-09-25 14:50:20,539 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 02:50:20" (1/1) ... [2020-09-25 14:50:20,616 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 02:50:20" (1/1) ... [2020-09-25 14:50:20,653 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 02:50:20" (1/1) ... [2020-09-25 14:50:20,663 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 02:50:20" (1/1) ... [2020-09-25 14:50:20,678 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-25 14:50:20,678 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-25 14:50:20,679 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-25 14:50:20,679 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-25 14:50:20,680 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 02:50:20" (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 14:50:20,774 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-25 14:50:20,775 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-25 14:50:20,776 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-09-25 14:50:20,776 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-25 14:50:20,776 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-25 14:50:20,777 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-09-25 14:50:20,778 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uchar [2020-09-25 14:50:20,779 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-09-25 14:50:20,779 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2020-09-25 14:50:20,779 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-09-25 14:50:20,779 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-09-25 14:50:20,780 INFO L130 BoogieDeclarations]: Found specification of procedure read [2020-09-25 14:50:20,780 INFO L130 BoogieDeclarations]: Found specification of procedure write [2020-09-25 14:50:20,780 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2020-09-25 14:50:20,780 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2020-09-25 14:50:20,781 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2020-09-25 14:50:20,781 INFO L130 BoogieDeclarations]: Found specification of procedure node4 [2020-09-25 14:50:20,782 INFO L130 BoogieDeclarations]: Found specification of procedure init [2020-09-25 14:50:20,782 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-09-25 14:50:20,782 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-25 14:50:20,782 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-25 14:50:20,783 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-25 14:50:24,089 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-25 14:50:24,089 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-09-25 14:50:24,107 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.09 02:50:24 BoogieIcfgContainer [2020-09-25 14:50:24,107 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-25 14:50:24,109 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-25 14:50:24,109 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-25 14:50:24,113 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-25 14:50:24,113 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.09 02:50:18" (1/3) ... [2020-09-25 14:50:24,114 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4ee4f94f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.09 02:50:24, skipping insertion in model container [2020-09-25 14:50:24,114 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 02:50:20" (2/3) ... [2020-09-25 14:50:24,115 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4ee4f94f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.09 02:50:24, skipping insertion in model container [2020-09-25 14:50:24,115 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.09 02:50:24" (3/3) ... [2020-09-25 14:50:24,120 INFO L109 eAbstractionObserver]: Analyzing ICFG pals_opt-floodmax.4.1.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c [2020-09-25 14:50:24,132 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-25 14:50:24,150 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-25 14:50:24,172 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-09-25 14:50:24,212 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-25 14:50:24,212 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-25 14:50:24,213 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-09-25 14:50:24,213 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-25 14:50:24,213 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-25 14:50:24,213 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-25 14:50:24,213 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-25 14:50:24,213 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-25 14:50:24,266 INFO L276 IsEmpty]: Start isEmpty. Operand 1994 states. [2020-09-25 14:50:24,337 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 909 [2020-09-25 14:50:24,338 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 14:50:24,340 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 14:50:24,341 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 14:50:24,348 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 14:50:24,350 INFO L82 PathProgramCache]: Analyzing trace with hash -2948384, now seen corresponding path program 1 times [2020-09-25 14:50:24,361 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 14:50:24,362 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1882315312] [2020-09-25 14:50:24,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 14:50:25,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 14:50:26,117 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:50:27,076 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:50:27,706 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:50:28,328 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:50:28,745 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:50:29,077 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:50:29,377 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:50:29,612 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:50:30,290 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:50:30,439 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 14:50:30,439 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 915 [2020-09-25 14:50:30,439 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-09-25 14:50:30,440 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5066 [2020-09-25 14:50:30,444 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 14:50:30,446 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.5 [2020-09-25 14:50:30,446 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-25 14:50:30,447 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 378 [2020-09-25 14:50:30,447 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 500 [2020-09-25 14:50:30,448 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 7 [2020-09-25 14:50:31,731 WARN L193 SmtUtils]: Spent 483.00 ms on a formula simplification that was a NOOP. DAG size: 277 [2020-09-25 14:50:31,733 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 14:50:31,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 14:50:31,762 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:50:31,842 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 14:50:31,842 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 102 [2020-09-25 14:50:31,842 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 14:50:31,843 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 94 [2020-09-25 14:50:31,843 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 14:50:31,843 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.5 [2020-09-25 14:50:31,844 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 14:50:31,844 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 14:50:31,844 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 14:50:31,844 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 14:50:33,442 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 14:50:33,443 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1882315312] [2020-09-25 14:50:33,445 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-25 14:50:33,446 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-09-25 14:50:33,447 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1135577888] [2020-09-25 14:50:33,455 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-09-25 14:50:33,456 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 14:50:33,474 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-09-25 14:50:33,476 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-25 14:50:33,479 INFO L87 Difference]: Start difference. First operand 1994 states. Second operand 4 states. [2020-09-25 14:50:42,736 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 14:50:42,736 INFO L93 Difference]: Finished difference Result 3387 states and 4474 transitions. [2020-09-25 14:50:42,737 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-09-25 14:50:42,739 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 908 [2020-09-25 14:50:42,744 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 14:50:42,793 INFO L225 Difference]: With dead ends: 3387 [2020-09-25 14:50:42,794 INFO L226 Difference]: Without dead ends: 2783 [2020-09-25 14:50:42,804 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-25 14:50:42,832 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2783 states. [2020-09-25 14:50:42,976 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2783 to 2770. [2020-09-25 14:50:42,978 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2770 states. [2020-09-25 14:50:42,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2770 states to 2770 states and 3483 transitions. [2020-09-25 14:50:42,991 INFO L78 Accepts]: Start accepts. Automaton has 2770 states and 3483 transitions. Word has length 908 [2020-09-25 14:50:42,993 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 14:50:42,993 INFO L479 AbstractCegarLoop]: Abstraction has 2770 states and 3483 transitions. [2020-09-25 14:50:42,993 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-09-25 14:50:42,994 INFO L276 IsEmpty]: Start isEmpty. Operand 2770 states and 3483 transitions. [2020-09-25 14:50:43,028 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 909 [2020-09-25 14:50:43,028 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 14:50:43,029 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 14:50:43,029 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-25 14:50:43,030 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 14:50:43,030 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 14:50:43,030 INFO L82 PathProgramCache]: Analyzing trace with hash -4225536, now seen corresponding path program 1 times [2020-09-25 14:50:43,031 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 14:50:43,031 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1113753121] [2020-09-25 14:50:43,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 14:50:43,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 14:50:43,682 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:50:44,242 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:50:44,650 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:50:45,023 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:50:45,348 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:50:45,615 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:50:45,881 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:50:46,143 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:50:46,694 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:50:48,381 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 14:50:48,382 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 915 [2020-09-25 14:50:48,382 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-09-25 14:50:48,383 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5049 [2020-09-25 14:50:48,383 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 14:50:48,383 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.5 [2020-09-25 14:50:48,393 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-09-25 14:50:48,393 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 278 [2020-09-25 14:50:48,394 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 316 [2020-09-25 14:50:48,394 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 11 [2020-09-25 14:50:49,465 WARN L193 SmtUtils]: Spent 411.00 ms on a formula simplification that was a NOOP. DAG size: 277 [2020-09-25 14:50:49,467 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 14:50:49,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 14:50:49,487 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:50:49,543 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 14:50:49,544 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 102 [2020-09-25 14:50:49,544 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 14:50:49,544 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 67 [2020-09-25 14:50:49,544 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 14:50:49,544 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.5 [2020-09-25 14:50:49,545 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 14:50:49,545 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 14:50:49,545 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 14:50:49,545 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 14:50:50,514 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 14:50:50,515 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1113753121] [2020-09-25 14:50:50,515 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-25 14:50:50,515 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-09-25 14:50:50,516 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1389701125] [2020-09-25 14:50:50,519 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-25 14:50:50,519 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 14:50:50,519 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-25 14:50:50,520 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-09-25 14:50:50,520 INFO L87 Difference]: Start difference. First operand 2770 states and 3483 transitions. Second operand 5 states. [2020-09-25 14:51:05,036 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 14:51:05,037 INFO L93 Difference]: Finished difference Result 7600 states and 9684 transitions. [2020-09-25 14:51:05,038 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-09-25 14:51:05,038 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 908 [2020-09-25 14:51:05,040 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 14:51:05,062 INFO L225 Difference]: With dead ends: 7600 [2020-09-25 14:51:05,063 INFO L226 Difference]: Without dead ends: 5161 [2020-09-25 14:51:05,068 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 14:51:05,077 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5161 states. [2020-09-25 14:51:05,228 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5161 to 5159. [2020-09-25 14:51:05,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5159 states. [2020-09-25 14:51:05,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5159 states to 5159 states and 6536 transitions. [2020-09-25 14:51:05,244 INFO L78 Accepts]: Start accepts. Automaton has 5159 states and 6536 transitions. Word has length 908 [2020-09-25 14:51:05,245 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 14:51:05,245 INFO L479 AbstractCegarLoop]: Abstraction has 5159 states and 6536 transitions. [2020-09-25 14:51:05,245 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-25 14:51:05,246 INFO L276 IsEmpty]: Start isEmpty. Operand 5159 states and 6536 transitions. [2020-09-25 14:51:05,264 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 911 [2020-09-25 14:51:05,264 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 14:51:05,265 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 14:51:05,265 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-25 14:51:05,266 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 14:51:05,266 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 14:51:05,266 INFO L82 PathProgramCache]: Analyzing trace with hash 1299069350, now seen corresponding path program 1 times [2020-09-25 14:51:05,267 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 14:51:05,267 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [745695439] [2020-09-25 14:51:05,267 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 14:51:05,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 14:51:05,552 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:51:05,787 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:51:06,145 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:51:06,541 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:51:06,949 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:51:07,235 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:51:07,499 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:51:07,710 FATAL L256 erpolLogProxyWrapper]: Now shrinking...