/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_opt-floodmax.3.1.ufo.BOUNDED-6.pals.c.v+nlh-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-c90d42b [2020-09-24 21:54:02,561 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-24 21:54:02,565 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-24 21:54:02,592 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-24 21:54:02,593 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-24 21:54:02,594 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-24 21:54:02,596 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-24 21:54:02,598 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-24 21:54:02,600 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-24 21:54:02,601 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-24 21:54:02,602 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-24 21:54:02,603 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-24 21:54:02,603 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-24 21:54:02,608 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-24 21:54:02,609 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-24 21:54:02,610 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-24 21:54:02,613 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-24 21:54:02,617 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-24 21:54:02,619 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-24 21:54:02,623 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-24 21:54:02,627 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-24 21:54:02,628 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-24 21:54:02,631 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-24 21:54:02,632 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-24 21:54:02,637 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-09-24 21:54:02,638 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-09-24 21:54:02,639 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-09-24 21:54:02,640 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-09-24 21:54:02,643 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-09-24 21:54:02,644 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-09-24 21:54:02,644 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-09-24 21:54:02,646 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-09-24 21:54:02,647 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-09-24 21:54:02,648 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-09-24 21:54:02,650 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-09-24 21:54:02,650 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-09-24 21:54:02,651 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-09-24 21:54:02,651 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-09-24 21:54:02,651 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-24 21:54:02,653 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-24 21:54:02,654 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-24 21:54:02,655 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 21:54:02,719 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-24 21:54:02,720 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-24 21:54:02,721 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-09-24 21:54:02,721 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-09-24 21:54:02,721 INFO L138 SettingsManager]: * Use SBE=true [2020-09-24 21:54:02,722 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-24 21:54:02,722 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-24 21:54:02,722 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-24 21:54:02,722 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-24 21:54:02,722 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-24 21:54:02,723 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-24 21:54:02,723 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-24 21:54:02,723 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-24 21:54:02,723 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-24 21:54:02,723 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-24 21:54:02,725 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-24 21:54:02,726 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-24 21:54:02,726 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-24 21:54:02,726 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-09-24 21:54:02,726 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-24 21:54:02,727 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-24 21:54:02,727 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-24 21:54:02,727 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-24 21:54:02,727 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-09-24 21:54:02,727 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-09-24 21:54:02,728 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-09-24 21:54:02,728 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-09-24 21:54:02,728 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-24 21:54:02,728 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-09-24 21:54:02,728 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 21:54:03,233 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-24 21:54:03,252 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-24 21:54:03,257 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-24 21:54:03,259 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-24 21:54:03,259 INFO L275 PluginConnector]: CDTParser initialized [2020-09-24 21:54:03,261 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.3.1.ufo.BOUNDED-6.pals.c.v+nlh-reducer.c [2020-09-24 21:54:03,341 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/6c30b2af4/76f8c9865f7547e5852092ad01334f54/FLAG004e96649 [2020-09-24 21:54:03,951 INFO L306 CDTParser]: Found 1 translation units. [2020-09-24 21:54:03,952 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.3.1.ufo.BOUNDED-6.pals.c.v+nlh-reducer.c [2020-09-24 21:54:03,965 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/6c30b2af4/76f8c9865f7547e5852092ad01334f54/FLAG004e96649 [2020-09-24 21:54:04,191 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/6c30b2af4/76f8c9865f7547e5852092ad01334f54 [2020-09-24 21:54:04,206 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-24 21:54:04,212 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-24 21:54:04,214 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-24 21:54:04,214 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-24 21:54:04,218 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-24 21:54:04,219 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.09 09:54:04" (1/1) ... [2020-09-24 21:54:04,223 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6b2f3aa8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:54:04, skipping insertion in model container [2020-09-24 21:54:04,224 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.09 09:54:04" (1/1) ... [2020-09-24 21:54:04,233 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-24 21:54:04,299 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-24 21:54:04,946 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-24 21:54:04,963 INFO L203 MainTranslator]: Completed pre-run [2020-09-24 21:54:05,441 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-24 21:54:05,468 INFO L208 MainTranslator]: Completed translation [2020-09-24 21:54:05,468 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:54:05 WrapperNode [2020-09-24 21:54:05,469 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-24 21:54:05,470 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-24 21:54:05,470 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-24 21:54:05,470 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-24 21:54:05,486 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:54:05" (1/1) ... [2020-09-24 21:54:05,486 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:54:05" (1/1) ... [2020-09-24 21:54:05,509 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:54:05" (1/1) ... [2020-09-24 21:54:05,510 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:54:05" (1/1) ... [2020-09-24 21:54:05,545 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:54:05" (1/1) ... [2020-09-24 21:54:05,567 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:54:05" (1/1) ... [2020-09-24 21:54:05,586 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:54:05" (1/1) ... [2020-09-24 21:54:05,600 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-24 21:54:05,605 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-24 21:54:05,605 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-24 21:54:05,605 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-24 21:54:05,607 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:54:05" (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 21:54:05,702 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-24 21:54:05,702 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-24 21:54:05,702 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-09-24 21:54:05,702 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-24 21:54:05,703 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-24 21:54:05,703 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-09-24 21:54:05,703 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-09-24 21:54:05,703 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2020-09-24 21:54:05,703 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-09-24 21:54:05,704 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-09-24 21:54:05,704 INFO L130 BoogieDeclarations]: Found specification of procedure read [2020-09-24 21:54:05,704 INFO L130 BoogieDeclarations]: Found specification of procedure write [2020-09-24 21:54:05,704 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2020-09-24 21:54:05,704 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2020-09-24 21:54:05,705 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2020-09-24 21:54:05,705 INFO L130 BoogieDeclarations]: Found specification of procedure init [2020-09-24 21:54:05,705 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-09-24 21:54:05,705 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-24 21:54:05,706 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-24 21:54:05,706 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-24 21:54:07,601 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-24 21:54:07,602 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-09-24 21:54:07,616 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.09 09:54:07 BoogieIcfgContainer [2020-09-24 21:54:07,616 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-24 21:54:07,617 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-24 21:54:07,617 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-24 21:54:07,622 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-24 21:54:07,622 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.09 09:54:04" (1/3) ... [2020-09-24 21:54:07,623 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@52ab5c53 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.09 09:54:07, skipping insertion in model container [2020-09-24 21:54:07,624 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:54:05" (2/3) ... [2020-09-24 21:54:07,624 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@52ab5c53 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.09 09:54:07, skipping insertion in model container [2020-09-24 21:54:07,624 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.09 09:54:07" (3/3) ... [2020-09-24 21:54:07,627 INFO L109 eAbstractionObserver]: Analyzing ICFG pals_opt-floodmax.3.1.ufo.BOUNDED-6.pals.c.v+nlh-reducer.c [2020-09-24 21:54:07,640 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-24 21:54:07,654 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-24 21:54:07,678 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-09-24 21:54:07,714 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-24 21:54:07,715 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-24 21:54:07,715 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-09-24 21:54:07,715 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-24 21:54:07,715 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-24 21:54:07,715 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-24 21:54:07,715 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-24 21:54:07,715 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-24 21:54:07,756 INFO L276 IsEmpty]: Start isEmpty. Operand 912 states. [2020-09-24 21:54:07,788 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 461 [2020-09-24 21:54:07,789 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 21:54:07,791 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] [2020-09-24 21:54:07,791 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 21:54:07,799 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 21:54:07,800 INFO L82 PathProgramCache]: Analyzing trace with hash 752602954, now seen corresponding path program 1 times [2020-09-24 21:54:07,813 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 21:54:07,813 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [554821465] [2020-09-24 21:54:07,814 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 21:54:08,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:54:08,688 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:54:08,982 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:54:09,269 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:54:09,471 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:54:09,671 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:54:09,890 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:54:10,338 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:54:10,764 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:54:13,483 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:54:13,483 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 467 [2020-09-24 21:54:13,483 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-09-24 21:54:13,484 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5046 [2020-09-24 21:54:13,487 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:54:13,488 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-09-24 21:54:13,488 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 172 [2020-09-24 21:54:13,488 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 71 [2020-09-24 21:54:13,488 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-09-24 21:54:14,148 WARN L193 SmtUtils]: Spent 259.00 ms on a formula simplification that was a NOOP. DAG size: 181 [2020-09-24 21:54:14,152 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 21:54:14,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:54:14,178 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:54:14,241 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:54:14,242 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 69 [2020-09-24 21:54:14,242 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 21:54:14,242 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 72 [2020-09-24 21:54:14,242 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:54:14,242 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 21:54:14,243 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 21:54:14,243 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 21:54:14,243 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 21:54:14,775 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 21:54:14,776 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [554821465] [2020-09-24 21:54:14,780 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-24 21:54:14,781 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-09-24 21:54:14,782 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1695209108] [2020-09-24 21:54:14,796 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-24 21:54:14,796 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 21:54:14,823 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-24 21:54:14,824 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-09-24 21:54:14,829 INFO L87 Difference]: Start difference. First operand 912 states. Second operand 5 states. [2020-09-24 21:54:20,644 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 21:54:20,644 INFO L93 Difference]: Finished difference Result 2329 states and 3060 transitions. [2020-09-24 21:54:20,644 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-09-24 21:54:20,646 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 460 [2020-09-24 21:54:20,648 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 21:54:20,692 INFO L225 Difference]: With dead ends: 2329 [2020-09-24 21:54:20,693 INFO L226 Difference]: Without dead ends: 1408 [2020-09-24 21:54:20,702 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 21:54:20,725 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1408 states. [2020-09-24 21:54:20,832 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1408 to 1406. [2020-09-24 21:54:20,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1406 states. [2020-09-24 21:54:20,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1406 states to 1406 states and 1701 transitions. [2020-09-24 21:54:20,843 INFO L78 Accepts]: Start accepts. Automaton has 1406 states and 1701 transitions. Word has length 460 [2020-09-24 21:54:20,844 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 21:54:20,844 INFO L479 AbstractCegarLoop]: Abstraction has 1406 states and 1701 transitions. [2020-09-24 21:54:20,845 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-24 21:54:20,845 INFO L276 IsEmpty]: Start isEmpty. Operand 1406 states and 1701 transitions. [2020-09-24 21:54:20,860 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 462 [2020-09-24 21:54:20,860 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 21:54:20,861 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] [2020-09-24 21:54:20,861 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-24 21:54:20,861 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 21:54:20,862 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 21:54:20,862 INFO L82 PathProgramCache]: Analyzing trace with hash -1881384942, now seen corresponding path program 1 times [2020-09-24 21:54:20,862 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 21:54:20,863 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1762640456] [2020-09-24 21:54:20,863 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 21:54:20,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:54:21,001 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:54:21,139 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:54:21,335 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:54:21,495 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:54:21,631 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:54:21,755 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:54:22,085 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:54:22,401 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:54:25,977 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:54:25,978 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 468 [2020-09-24 21:54:25,978 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-09-24 21:54:25,978 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5045 [2020-09-24 21:54:25,979 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:54:25,979 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-09-24 21:54:25,979 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 173 [2020-09-24 21:54:25,979 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 72 [2020-09-24 21:54:25,980 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 21:54:26,376 WARN L193 SmtUtils]: Spent 201.00 ms on a formula simplification that was a NOOP. DAG size: 181 [2020-09-24 21:54:26,377 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 21:54:26,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:54:26,391 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:54:26,428 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:54:26,429 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 69 [2020-09-24 21:54:26,429 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 21:54:26,429 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 44 [2020-09-24 21:54:26,429 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:54:26,430 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 21:54:26,430 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 21:54:26,430 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 21:54:26,430 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 21:54:26,723 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 21:54:26,724 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1762640456] [2020-09-24 21:54:26,724 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-24 21:54:26,725 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-09-24 21:54:26,725 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [525148435] [2020-09-24 21:54:26,728 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-24 21:54:26,729 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 21:54:26,729 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-24 21:54:26,730 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-09-24 21:54:26,730 INFO L87 Difference]: Start difference. First operand 1406 states and 1701 transitions. Second operand 5 states. [2020-09-24 21:54:31,304 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 21:54:31,305 INFO L93 Difference]: Finished difference Result 3769 states and 4619 transitions. [2020-09-24 21:54:31,307 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-09-24 21:54:31,307 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 461 [2020-09-24 21:54:31,308 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 21:54:31,321 INFO L225 Difference]: With dead ends: 3769 [2020-09-24 21:54:31,321 INFO L226 Difference]: Without dead ends: 2548 [2020-09-24 21:54:31,325 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 21:54:31,329 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2548 states. [2020-09-24 21:54:31,402 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2548 to 2546. [2020-09-24 21:54:31,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2546 states. [2020-09-24 21:54:31,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2546 states to 2546 states and 3092 transitions. [2020-09-24 21:54:31,412 INFO L78 Accepts]: Start accepts. Automaton has 2546 states and 3092 transitions. Word has length 461 [2020-09-24 21:54:31,413 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 21:54:31,413 INFO L479 AbstractCegarLoop]: Abstraction has 2546 states and 3092 transitions. [2020-09-24 21:54:31,414 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-24 21:54:31,414 INFO L276 IsEmpty]: Start isEmpty. Operand 2546 states and 3092 transitions. [2020-09-24 21:54:31,427 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 463 [2020-09-24 21:54:31,427 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 21:54:31,428 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] [2020-09-24 21:54:31,428 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-24 21:54:31,429 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 21:54:31,429 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 21:54:31,429 INFO L82 PathProgramCache]: Analyzing trace with hash 887221220, now seen corresponding path program 1 times [2020-09-24 21:54:31,429 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 21:54:31,430 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1217879825] [2020-09-24 21:54:31,430 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 21:54:31,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:54:31,616 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:54:31,809 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:54:32,035 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:54:32,178 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:54:32,313 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:54:32,761 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:54:33,464 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:54:33,780 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:54:36,519 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:54:36,519 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 469 [2020-09-24 21:54:36,519 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-09-24 21:54:36,519 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-09-24 21:54:36,520 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:54:36,520 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-09-24 21:54:36,520 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 174 [2020-09-24 21:54:36,520 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 78 [2020-09-24 21:54:36,521 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 21:54:37,024 WARN L193 SmtUtils]: Spent 245.00 ms on a formula simplification that was a NOOP. DAG size: 181 [2020-09-24 21:54:37,025 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 21:54:37,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:54:37,059 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:54:37,099 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:54:37,099 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 69 [2020-09-24 21:54:37,100 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 21:54:37,100 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 66 [2020-09-24 21:54:37,100 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:54:37,100 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 21:54:37,101 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 21:54:37,101 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 21:54:37,101 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 21:54:37,393 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 21:54:37,393 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1217879825] [2020-09-24 21:54:37,394 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-24 21:54:37,394 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-09-24 21:54:37,395 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [487938633] [2020-09-24 21:54:37,396 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-24 21:54:37,396 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 21:54:37,396 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-24 21:54:37,397 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-09-24 21:54:37,397 INFO L87 Difference]: Start difference. First operand 2546 states and 3092 transitions. Second operand 5 states. [2020-09-24 21:54:42,522 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 21:54:42,522 INFO L93 Difference]: Finished difference Result 6974 states and 8502 transitions. [2020-09-24 21:54:42,523 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-09-24 21:54:42,523 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 462 [2020-09-24 21:54:42,526 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 21:54:42,549 INFO L225 Difference]: With dead ends: 6974 [2020-09-24 21:54:42,549 INFO L226 Difference]: Without dead ends: 4708 [2020-09-24 21:54:42,556 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 21:54:42,563 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4708 states. [2020-09-24 21:54:42,784 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4708 to 4706. [2020-09-24 21:54:42,784 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4706 states. [2020-09-24 21:54:42,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4706 states to 4706 states and 5702 transitions. [2020-09-24 21:54:42,798 INFO L78 Accepts]: Start accepts. Automaton has 4706 states and 5702 transitions. Word has length 462 [2020-09-24 21:54:42,799 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 21:54:42,799 INFO L479 AbstractCegarLoop]: Abstraction has 4706 states and 5702 transitions. [2020-09-24 21:54:42,800 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-24 21:54:42,800 INFO L276 IsEmpty]: Start isEmpty. Operand 4706 states and 5702 transitions. [2020-09-24 21:54:42,810 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 464 [2020-09-24 21:54:42,810 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 21:54:42,810 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] [2020-09-24 21:54:42,811 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-09-24 21:54:42,811 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 21:54:42,811 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 21:54:42,812 INFO L82 PathProgramCache]: Analyzing trace with hash -970660380, now seen corresponding path program 1 times [2020-09-24 21:54:42,813 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 21:54:42,818 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1545214913] [2020-09-24 21:54:42,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 21:54:42,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:54:42,963 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:54:43,101 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:54:43,257 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:54:43,400 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:54:43,522 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:54:43,631 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:54:44,515 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:54:47,231 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:54:47,920 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:54:47,921 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 470 [2020-09-24 21:54:47,921 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-09-24 21:54:47,921 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5034 [2020-09-24 21:54:47,922 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:54:47,922 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-09-24 21:54:47,922 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 175 [2020-09-24 21:54:47,922 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 79 [2020-09-24 21:54:47,923 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 21:54:48,344 WARN L193 SmtUtils]: Spent 256.00 ms on a formula simplification that was a NOOP. DAG size: 181 [2020-09-24 21:54:48,351 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 21:54:48,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:54:48,367 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:54:48,400 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:54:48,400 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 69 [2020-09-24 21:54:48,400 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 21:54:48,400 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 40 [2020-09-24 21:54:48,401 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:54:48,401 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 21:54:48,401 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 21:54:48,401 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 21:54:48,402 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 21:54:48,561 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 21:54:48,561 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1545214913] [2020-09-24 21:54:48,562 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-24 21:54:48,562 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-09-24 21:54:48,562 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1538048861] [2020-09-24 21:54:48,563 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-24 21:54:48,563 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 21:54:48,563 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-24 21:54:48,564 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-09-24 21:54:48,564 INFO L87 Difference]: Start difference. First operand 4706 states and 5702 transitions. Second operand 5 states.