/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=LOWLEXORDER --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_floodmax.3.1.ufo.BOUNDED-6.pals.c.v+nlh-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-c90d42b [2020-09-24 21:53:21,757 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-24 21:53:21,761 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-24 21:53:21,805 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-24 21:53:21,806 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-24 21:53:21,814 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-24 21:53:21,817 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-24 21:53:21,821 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-24 21:53:21,823 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-24 21:53:21,827 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-24 21:53:21,828 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-24 21:53:21,829 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-24 21:53:21,829 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-24 21:53:21,832 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-24 21:53:21,835 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-24 21:53:21,837 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-24 21:53:21,840 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-24 21:53:21,842 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-24 21:53:21,843 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-24 21:53:21,852 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-24 21:53:21,854 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-24 21:53:21,856 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-24 21:53:21,857 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-24 21:53:21,858 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-24 21:53:21,873 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-09-24 21:53:21,873 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-09-24 21:53:21,873 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-09-24 21:53:21,874 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-09-24 21:53:21,879 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-09-24 21:53:21,880 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-09-24 21:53:21,880 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-09-24 21:53:21,881 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-09-24 21:53:21,885 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-09-24 21:53:21,886 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-09-24 21:53:21,888 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-09-24 21:53:21,888 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-09-24 21:53:21,889 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-09-24 21:53:21,889 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-09-24 21:53:21,889 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-24 21:53:21,891 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-24 21:53:21,892 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-24 21:53:21,893 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 [2020-09-24 21:53:21,941 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-24 21:53:21,942 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-24 21:53:21,944 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-09-24 21:53:21,945 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-09-24 21:53:21,945 INFO L138 SettingsManager]: * Use SBE=true [2020-09-24 21:53:21,945 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-24 21:53:21,946 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-24 21:53:21,946 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-24 21:53:21,946 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-24 21:53:21,946 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-24 21:53:21,947 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-24 21:53:21,948 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-24 21:53:21,948 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-24 21:53:21,948 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-24 21:53:21,948 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-24 21:53:21,949 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-24 21:53:21,949 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-24 21:53:21,949 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-24 21:53:21,949 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-09-24 21:53:21,949 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-24 21:53:21,950 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-24 21:53:21,950 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-24 21:53:21,950 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-24 21:53:21,950 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-09-24 21:53:21,951 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-09-24 21:53:21,951 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-09-24 21:53:21,951 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-09-24 21:53:21,951 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-24 21:53:21,951 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-09-24 21:53:21,952 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=LOWLEXORDER;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=LOWLEXORDER;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=LOWLEXORDER;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=LOWLEXORDER;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=LOWLEXORDER;log-additional-information=true; [2020-09-24 21:53:22,428 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-24 21:53:22,456 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-24 21:53:22,462 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-24 21:53:22,465 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-24 21:53:22,465 INFO L275 PluginConnector]: CDTParser initialized [2020-09-24 21:53:22,466 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_floodmax.3.1.ufo.BOUNDED-6.pals.c.v+nlh-reducer.c [2020-09-24 21:53:22,564 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/0db2fed2a/94f3b0ad3b2043c1bd6e2c9c8cd48c4d/FLAG86736b22c [2020-09-24 21:53:23,157 INFO L306 CDTParser]: Found 1 translation units. [2020-09-24 21:53:23,158 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/seq-mthreaded-reduced/pals_floodmax.3.1.ufo.BOUNDED-6.pals.c.v+nlh-reducer.c [2020-09-24 21:53:23,186 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/0db2fed2a/94f3b0ad3b2043c1bd6e2c9c8cd48c4d/FLAG86736b22c [2020-09-24 21:53:23,423 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/0db2fed2a/94f3b0ad3b2043c1bd6e2c9c8cd48c4d [2020-09-24 21:53:23,438 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-24 21:53:23,445 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-24 21:53:23,449 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-24 21:53:23,449 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-24 21:53:23,453 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-24 21:53:23,454 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.09 09:53:23" (1/1) ... [2020-09-24 21:53:23,459 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7b134fed and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:53:23, skipping insertion in model container [2020-09-24 21:53:23,459 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.09 09:53:23" (1/1) ... [2020-09-24 21:53:23,470 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-24 21:53:23,562 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-24 21:53:24,154 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-24 21:53:24,167 INFO L203 MainTranslator]: Completed pre-run [2020-09-24 21:53:24,352 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-24 21:53:24,375 INFO L208 MainTranslator]: Completed translation [2020-09-24 21:53:24,375 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:53:24 WrapperNode [2020-09-24 21:53:24,375 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-24 21:53:24,376 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-24 21:53:24,377 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-24 21:53:24,377 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-24 21:53:24,392 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:53:24" (1/1) ... [2020-09-24 21:53:24,393 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:53:24" (1/1) ... [2020-09-24 21:53:24,411 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:53:24" (1/1) ... [2020-09-24 21:53:24,411 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:53:24" (1/1) ... [2020-09-24 21:53:24,438 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:53:24" (1/1) ... [2020-09-24 21:53:24,462 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:53:24" (1/1) ... [2020-09-24 21:53:24,467 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:53:24" (1/1) ... [2020-09-24 21:53:24,475 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-24 21:53:24,475 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-24 21:53:24,476 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-24 21:53:24,476 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-24 21:53:24,477 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:53:24" (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 [2020-09-24 21:53:24,590 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-24 21:53:24,590 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-24 21:53:24,590 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-09-24 21:53:24,591 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-24 21:53:24,591 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-24 21:53:24,591 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-09-24 21:53:24,591 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-09-24 21:53:24,591 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2020-09-24 21:53:24,592 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-09-24 21:53:24,593 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-09-24 21:53:24,593 INFO L130 BoogieDeclarations]: Found specification of procedure read [2020-09-24 21:53:24,593 INFO L130 BoogieDeclarations]: Found specification of procedure write [2020-09-24 21:53:24,593 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2020-09-24 21:53:24,593 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2020-09-24 21:53:24,594 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2020-09-24 21:53:24,595 INFO L130 BoogieDeclarations]: Found specification of procedure init [2020-09-24 21:53:24,595 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-09-24 21:53:24,595 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-24 21:53:24,595 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-24 21:53:24,596 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-24 21:53:26,264 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-24 21:53:26,265 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-09-24 21:53:26,286 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.09 09:53:26 BoogieIcfgContainer [2020-09-24 21:53:26,287 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-24 21:53:26,288 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-24 21:53:26,288 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-24 21:53:26,293 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-24 21:53:26,294 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.09 09:53:23" (1/3) ... [2020-09-24 21:53:26,295 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@79db8cca and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.09 09:53:26, skipping insertion in model container [2020-09-24 21:53:26,295 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:53:24" (2/3) ... [2020-09-24 21:53:26,296 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@79db8cca and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.09 09:53:26, skipping insertion in model container [2020-09-24 21:53:26,296 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.09 09:53:26" (3/3) ... [2020-09-24 21:53:26,300 INFO L109 eAbstractionObserver]: Analyzing ICFG pals_floodmax.3.1.ufo.BOUNDED-6.pals.c.v+nlh-reducer.c [2020-09-24 21:53:26,312 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-24 21:53:26,332 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-24 21:53:26,357 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-09-24 21:53:26,405 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-24 21:53:26,405 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-24 21:53:26,405 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-09-24 21:53:26,405 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-24 21:53:26,405 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-24 21:53:26,406 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-24 21:53:26,406 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-24 21:53:26,406 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-24 21:53:26,444 INFO L276 IsEmpty]: Start isEmpty. Operand 822 states. [2020-09-24 21:53:26,478 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 419 [2020-09-24 21:53:26,478 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 21:53:26,480 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] [2020-09-24 21:53:26,481 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 21:53:26,489 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 21:53:26,489 INFO L82 PathProgramCache]: Analyzing trace with hash -1493724513, now seen corresponding path program 1 times [2020-09-24 21:53:26,502 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 21:53:26,503 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [979730261] [2020-09-24 21:53:26,503 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 21:53:27,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:53:27,347 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:53:27,712 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:53:27,931 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:53:28,130 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:53:28,293 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:53:28,424 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:53:28,749 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:53:29,051 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:53:32,096 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:53:32,096 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 425 [2020-09-24 21:53:32,097 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-09-24 21:53:32,097 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5060 [2020-09-24 21:53:32,101 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:53:32,102 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-09-24 21:53:32,102 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 163 [2020-09-24 21:53:32,102 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 66 [2020-09-24 21:53:32,103 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 6 [2020-09-24 21:53:33,044 WARN L193 SmtUtils]: Spent 420.00 ms on a formula simplification that was a NOOP. DAG size: 172 [2020-09-24 21:53:33,049 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 21:53:33,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:53:33,075 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:53:33,131 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:53:33,131 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 66 [2020-09-24 21:53:33,132 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 21:53:33,132 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 64 [2020-09-24 21:53:33,133 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:53:33,133 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 21:53:33,133 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 21:53:33,134 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 21:53:33,134 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 21:53:33,557 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 21:53:33,557 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [979730261] [2020-09-24 21:53:33,560 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-24 21:53:33,560 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-09-24 21:53:33,561 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [557830725] [2020-09-24 21:53:33,571 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-24 21:53:33,571 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 21:53:33,589 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-24 21:53:33,590 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-09-24 21:53:33,594 INFO L87 Difference]: Start difference. First operand 822 states. Second operand 5 states. [2020-09-24 21:53:39,952 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 21:53:39,953 INFO L93 Difference]: Finished difference Result 2052 states and 2711 transitions. [2020-09-24 21:53:39,953 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-09-24 21:53:39,955 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 418 [2020-09-24 21:53:39,958 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 21:53:39,987 INFO L225 Difference]: With dead ends: 2052 [2020-09-24 21:53:39,987 INFO L226 Difference]: Without dead ends: 1250 [2020-09-24 21:53:39,997 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 [2020-09-24 21:53:40,021 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1250 states. [2020-09-24 21:53:40,151 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1250 to 1248. [2020-09-24 21:53:40,153 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1248 states. [2020-09-24 21:53:40,162 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1248 states to 1248 states and 1511 transitions. [2020-09-24 21:53:40,164 INFO L78 Accepts]: Start accepts. Automaton has 1248 states and 1511 transitions. Word has length 418 [2020-09-24 21:53:40,169 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 21:53:40,169 INFO L479 AbstractCegarLoop]: Abstraction has 1248 states and 1511 transitions. [2020-09-24 21:53:40,169 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-24 21:53:40,170 INFO L276 IsEmpty]: Start isEmpty. Operand 1248 states and 1511 transitions. [2020-09-24 21:53:40,184 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 420 [2020-09-24 21:53:40,185 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 21:53:40,185 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] [2020-09-24 21:53:40,186 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-24 21:53:40,186 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 21:53:40,186 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 21:53:40,187 INFO L82 PathProgramCache]: Analyzing trace with hash -493468435, now seen corresponding path program 1 times [2020-09-24 21:53:40,188 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 21:53:40,188 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [614632856] [2020-09-24 21:53:40,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 21:53:40,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:53:40,354 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:53:40,528 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:53:40,702 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:53:40,850 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:53:40,978 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:53:41,097 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:53:41,381 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:53:41,695 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:53:45,279 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:53:45,279 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 426 [2020-09-24 21:53:45,279 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-09-24 21:53:45,280 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-09-24 21:53:45,281 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:53:45,281 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-09-24 21:53:45,281 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 164 [2020-09-24 21:53:45,281 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 67 [2020-09-24 21:53:45,281 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 21:53:45,707 WARN L193 SmtUtils]: Spent 182.00 ms on a formula simplification that was a NOOP. DAG size: 172 [2020-09-24 21:53:45,708 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 21:53:45,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:53:45,727 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:53:45,762 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:53:45,762 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 66 [2020-09-24 21:53:45,763 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 21:53:45,763 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 42 [2020-09-24 21:53:45,763 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:53:45,763 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 21:53:45,764 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 21:53:45,764 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 21:53:45,764 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 21:53:46,122 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 21:53:46,123 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [614632856] [2020-09-24 21:53:46,123 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-24 21:53:46,124 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-09-24 21:53:46,124 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1061894974] [2020-09-24 21:53:46,129 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-24 21:53:46,130 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 21:53:46,130 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-24 21:53:46,131 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-09-24 21:53:46,131 INFO L87 Difference]: Start difference. First operand 1248 states and 1511 transitions. Second operand 5 states. [2020-09-24 21:53:51,228 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 21:53:51,228 INFO L93 Difference]: Finished difference Result 3293 states and 4039 transitions. [2020-09-24 21:53:51,229 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-09-24 21:53:51,229 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 419 [2020-09-24 21:53:51,232 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 21:53:51,243 INFO L225 Difference]: With dead ends: 3293 [2020-09-24 21:53:51,243 INFO L226 Difference]: Without dead ends: 2257 [2020-09-24 21:53:51,247 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-09-24 21:53:51,250 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2257 states. [2020-09-24 21:53:51,335 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2257 to 2255. [2020-09-24 21:53:51,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2255 states. [2020-09-24 21:53:51,344 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2255 states to 2255 states and 2745 transitions. [2020-09-24 21:53:51,344 INFO L78 Accepts]: Start accepts. Automaton has 2255 states and 2745 transitions. Word has length 419 [2020-09-24 21:53:51,346 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 21:53:51,346 INFO L479 AbstractCegarLoop]: Abstraction has 2255 states and 2745 transitions. [2020-09-24 21:53:51,347 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-24 21:53:51,347 INFO L276 IsEmpty]: Start isEmpty. Operand 2255 states and 2745 transitions. [2020-09-24 21:53:51,358 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 421 [2020-09-24 21:53:51,358 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 21:53:51,358 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] [2020-09-24 21:53:51,359 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-24 21:53:51,359 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 21:53:51,359 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 21:53:51,360 INFO L82 PathProgramCache]: Analyzing trace with hash 884990985, now seen corresponding path program 1 times [2020-09-24 21:53:51,360 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 21:53:51,360 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [642618619] [2020-09-24 21:53:51,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 21:53:51,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:53:51,545 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:53:51,720 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:53:51,879 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:53:52,023 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:53:52,135 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:53:52,497 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:53:53,436 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:53:54,507 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:53:56,494 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:53:56,494 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 427 [2020-09-24 21:53:56,494 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-09-24 21:53:56,494 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5042 [2020-09-24 21:53:56,495 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:53:56,495 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-09-24 21:53:56,495 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 165 [2020-09-24 21:53:56,496 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 71 [2020-09-24 21:53:56,496 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 21:53:56,968 WARN L193 SmtUtils]: Spent 233.00 ms on a formula simplification that was a NOOP. DAG size: 172 [2020-09-24 21:53:56,969 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 21:53:56,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:53:56,984 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:53:57,017 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:53:57,018 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 66 [2020-09-24 21:53:57,018 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 21:53:57,018 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 41 [2020-09-24 21:53:57,018 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:53:57,019 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 21:53:57,019 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 21:53:57,019 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 21:53:57,019 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 21:53:57,336 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 21:53:57,337 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [642618619] [2020-09-24 21:53:57,337 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-24 21:53:57,338 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-09-24 21:53:57,338 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1027106930] [2020-09-24 21:53:57,339 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-24 21:53:57,339 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 21:53:57,339 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-24 21:53:57,340 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-09-24 21:53:57,340 INFO L87 Difference]: Start difference. First operand 2255 states and 2745 transitions. Second operand 5 states. [2020-09-24 21:54:02,367 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 21:54:02,368 INFO L93 Difference]: Finished difference Result 6131 states and 7495 transitions. [2020-09-24 21:54:02,368 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-09-24 21:54:02,369 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 420 [2020-09-24 21:54:02,369 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 21:54:02,388 INFO L225 Difference]: With dead ends: 6131 [2020-09-24 21:54:02,389 INFO L226 Difference]: Without dead ends: 4153 [2020-09-24 21:54:02,394 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-09-24 21:54:02,399 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4153 states. [2020-09-24 21:54:02,584 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4153 to 4151. [2020-09-24 21:54:02,584 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4151 states. [2020-09-24 21:54:02,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4151 states to 4151 states and 5043 transitions. [2020-09-24 21:54:02,597 INFO L78 Accepts]: Start accepts. Automaton has 4151 states and 5043 transitions. Word has length 420 [2020-09-24 21:54:02,597 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 21:54:02,598 INFO L479 AbstractCegarLoop]: Abstraction has 4151 states and 5043 transitions. [2020-09-24 21:54:02,598 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-24 21:54:02,598 INFO L276 IsEmpty]: Start isEmpty. Operand 4151 states and 5043 transitions. [2020-09-24 21:54:02,608 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 422 [2020-09-24 21:54:02,608 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 21:54:02,609 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] [2020-09-24 21:54:02,609 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-09-24 21:54:02,609 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 21:54:02,609 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 21:54:02,610 INFO L82 PathProgramCache]: Analyzing trace with hash 1664873111, now seen corresponding path program 1 times [2020-09-24 21:54:02,611 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 21:54:02,616 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1888579857] [2020-09-24 21:54:02,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 21:54:02,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:54:02,829 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:54:02,939 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:54:03,081 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:54:03,207 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:54:03,633 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:54:03,745 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:54:04,587 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:54:05,465 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:54:07,698 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:54:07,699 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 428 [2020-09-24 21:54:07,699 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-09-24 21:54:07,699 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5014 [2020-09-24 21:54:07,700 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:54:07,700 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-09-24 21:54:07,700 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 167 [2020-09-24 21:54:07,701 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 75 [2020-09-24 21:54:07,701 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 21:54:08,128 WARN L193 SmtUtils]: Spent 243.00 ms on a formula simplification that was a NOOP. DAG size: 172 [2020-09-24 21:54:08,129 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 21:54:08,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:54:08,143 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:54:08,182 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:54:08,182 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 66 [2020-09-24 21:54:08,182 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 21:54:08,183 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 46 [2020-09-24 21:54:08,183 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:54:08,183 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 21:54:08,184 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 21:54:08,184 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 21:54:08,184 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 21:54:08,422 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 21:54:08,422 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1888579857] [2020-09-24 21:54:08,422 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-24 21:54:08,423 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-09-24 21:54:08,423 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1730662676] [2020-09-24 21:54:08,424 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-24 21:54:08,424 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 21:54:08,425 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-24 21:54:08,425 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-09-24 21:54:08,425 INFO L87 Difference]: Start difference. First operand 4151 states and 5043 transitions. Second operand 5 states.