/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 --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=1000 --traceabstraction.additional.smt.options interpolation-heuristic=SMALLEST --traceabstraction.additional.smt.options log-additional-information=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.4.ufo.UNBOUNDED.pals.c.v+lhb-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-eb0fd7c [2020-09-21 12:39:21,562 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-21 12:39:21,566 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-21 12:39:21,610 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-21 12:39:21,610 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-21 12:39:21,613 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-21 12:39:21,622 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-21 12:39:21,624 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-21 12:39:21,629 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-21 12:39:21,631 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-21 12:39:21,632 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-21 12:39:21,633 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-21 12:39:21,634 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-21 12:39:21,635 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-21 12:39:21,639 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-21 12:39:21,640 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-21 12:39:21,643 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-21 12:39:21,647 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-21 12:39:21,650 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-21 12:39:21,652 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-21 12:39:21,659 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-21 12:39:21,660 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-21 12:39:21,661 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-21 12:39:21,662 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-21 12:39:21,670 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-09-21 12:39:21,670 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-09-21 12:39:21,670 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-09-21 12:39:21,673 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-09-21 12:39:21,673 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-09-21 12:39:21,674 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-09-21 12:39:21,674 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-09-21 12:39:21,676 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-09-21 12:39:21,677 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-09-21 12:39:21,678 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-09-21 12:39:21,679 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-09-21 12:39:21,679 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-09-21 12:39:21,680 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-09-21 12:39:21,680 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-09-21 12:39:21,681 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-21 12:39:21,682 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-21 12:39:21,683 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-21 12:39:21,684 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 [2020-09-21 12:39:21,723 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-21 12:39:21,724 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-21 12:39:21,725 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-09-21 12:39:21,725 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-09-21 12:39:21,725 INFO L138 SettingsManager]: * Use SBE=true [2020-09-21 12:39:21,726 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-21 12:39:21,726 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-21 12:39:21,726 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-21 12:39:21,726 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-21 12:39:21,727 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-21 12:39:21,727 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-21 12:39:21,727 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-21 12:39:21,727 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-21 12:39:21,727 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-21 12:39:21,728 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-21 12:39:21,728 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-21 12:39:21,728 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-21 12:39:21,728 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-21 12:39:21,728 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-09-21 12:39:21,729 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-21 12:39:21,729 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-21 12:39:21,729 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-21 12:39:21,729 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-21 12:39:21,729 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-09-21 12:39:21,730 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-09-21 12:39:21,730 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-09-21 12:39:21,730 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-09-21 12:39:21,730 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-21 12:39:21,730 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-09-21 12:39:21,731 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.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=1000;interpolation-heuristic=SMALLEST;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=1000;interpolation-heuristic=SMALLEST;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=1000;interpolation-heuristic=SMALLEST;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=1000;interpolation-heuristic=SMALLEST;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=1000;interpolation-heuristic=SMALLEST;log-additional-information=true; [2020-09-21 12:39:22,186 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-21 12:39:22,211 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-21 12:39:22,215 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-21 12:39:22,217 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-21 12:39:22,219 INFO L275 PluginConnector]: CDTParser initialized [2020-09-21 12:39:22,221 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.4.ufo.UNBOUNDED.pals.c.v+lhb-reducer.c [2020-09-21 12:39:22,317 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/95ae0909d/9c152863f76d4c209fd42ad9f32472b9/FLAG82a29a61f [2020-09-21 12:39:23,136 INFO L306 CDTParser]: Found 1 translation units. [2020-09-21 12:39:23,137 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.4.ufo.UNBOUNDED.pals.c.v+lhb-reducer.c [2020-09-21 12:39:23,169 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/95ae0909d/9c152863f76d4c209fd42ad9f32472b9/FLAG82a29a61f [2020-09-21 12:39:23,240 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/95ae0909d/9c152863f76d4c209fd42ad9f32472b9 [2020-09-21 12:39:23,254 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-21 12:39:23,260 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-21 12:39:23,261 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-21 12:39:23,261 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-21 12:39:23,266 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-21 12:39:23,267 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.09 12:39:23" (1/1) ... [2020-09-21 12:39:23,272 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@23d1a539 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 12:39:23, skipping insertion in model container [2020-09-21 12:39:23,272 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.09 12:39:23" (1/1) ... [2020-09-21 12:39:23,282 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-21 12:39:23,448 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-21 12:39:25,105 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-21 12:39:25,132 INFO L203 MainTranslator]: Completed pre-run [2020-09-21 12:39:26,163 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-21 12:39:26,198 INFO L208 MainTranslator]: Completed translation [2020-09-21 12:39:26,200 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 12:39:26 WrapperNode [2020-09-21 12:39:26,200 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-21 12:39:26,201 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-21 12:39:26,201 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-21 12:39:26,201 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-21 12:39:26,222 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 12:39:26" (1/1) ... [2020-09-21 12:39:26,224 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 12:39:26" (1/1) ... [2020-09-21 12:39:26,274 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 12:39:26" (1/1) ... [2020-09-21 12:39:26,275 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 12:39:26" (1/1) ... [2020-09-21 12:39:26,335 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 12:39:26" (1/1) ... [2020-09-21 12:39:26,374 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 12:39:26" (1/1) ... [2020-09-21 12:39:26,386 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 12:39:26" (1/1) ... [2020-09-21 12:39:26,409 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-21 12:39:26,409 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-21 12:39:26,410 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-21 12:39:26,410 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-21 12:39:26,413 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 12:39:26" (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 [2020-09-21 12:39:26,508 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-21 12:39:26,509 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-21 12:39:26,509 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-09-21 12:39:26,509 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-21 12:39:26,510 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-21 12:39:26,510 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-09-21 12:39:26,510 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uchar [2020-09-21 12:39:26,510 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-09-21 12:39:26,510 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2020-09-21 12:39:26,511 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-09-21 12:39:26,511 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-09-21 12:39:26,511 INFO L130 BoogieDeclarations]: Found specification of procedure read [2020-09-21 12:39:26,511 INFO L130 BoogieDeclarations]: Found specification of procedure write [2020-09-21 12:39:26,511 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2020-09-21 12:39:26,512 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2020-09-21 12:39:26,512 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2020-09-21 12:39:26,512 INFO L130 BoogieDeclarations]: Found specification of procedure node4 [2020-09-21 12:39:26,512 INFO L130 BoogieDeclarations]: Found specification of procedure init [2020-09-21 12:39:26,512 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-09-21 12:39:26,513 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-21 12:39:26,513 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-21 12:39:26,513 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-21 12:39:29,816 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-21 12:39:29,817 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-09-21 12:39:29,829 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.09 12:39:29 BoogieIcfgContainer [2020-09-21 12:39:29,829 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-21 12:39:29,911 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-21 12:39:29,913 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-21 12:39:29,919 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-21 12:39:29,919 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.09 12:39:23" (1/3) ... [2020-09-21 12:39:29,920 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5bccc654 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.09 12:39:29, skipping insertion in model container [2020-09-21 12:39:29,921 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 12:39:26" (2/3) ... [2020-09-21 12:39:29,921 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5bccc654 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.09 12:39:29, skipping insertion in model container [2020-09-21 12:39:29,921 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.09 12:39:29" (3/3) ... [2020-09-21 12:39:29,924 INFO L109 eAbstractionObserver]: Analyzing ICFG pals_opt-floodmax.4.ufo.UNBOUNDED.pals.c.v+lhb-reducer.c [2020-09-21 12:39:29,936 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-21 12:39:29,948 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 12 error locations. [2020-09-21 12:39:29,972 INFO L251 AbstractCegarLoop]: Starting to check reachability of 12 error locations. [2020-09-21 12:39:30,009 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-21 12:39:30,010 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-21 12:39:30,010 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-09-21 12:39:30,010 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-21 12:39:30,010 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-21 12:39:30,010 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-21 12:39:30,010 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-21 12:39:30,011 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-21 12:39:30,055 INFO L276 IsEmpty]: Start isEmpty. Operand 1027 states. [2020-09-21 12:39:30,088 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 328 [2020-09-21 12:39:30,088 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 12:39:30,094 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] [2020-09-21 12:39:30,095 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr4ASSERT_VIOLATIONERROR_FUNCTION, mainErr11ASSERT_VIOLATIONERROR_FUNCTION, mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr7ASSERT_VIOLATIONERROR_FUNCTION, mainErr8ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr6ASSERT_VIOLATIONERROR_FUNCTION, mainErr9ASSERT_VIOLATIONERROR_FUNCTION, mainErr5ASSERT_VIOLATIONERROR_FUNCTION, mainErr10ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 12:39:30,103 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 12:39:30,104 INFO L82 PathProgramCache]: Analyzing trace with hash -537993708, now seen corresponding path program 1 times [2020-09-21 12:39:30,116 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 12:39:30,117 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1427489785] [2020-09-21 12:39:30,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 12:39:30,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:39:31,317 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:39:32,042 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:39:32,474 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:39:32,474 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 334 [2020-09-21 12:39:32,474 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-21 12:39:32,475 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1500 [2020-09-21 12:39:32,478 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:39:32,478 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-21 12:39:32,479 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 87 [2020-09-21 12:39:32,479 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 219 [2020-09-21 12:39:32,479 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-09-21 12:39:33,696 WARN L193 SmtUtils]: Spent 697.00 ms on a formula simplification that was a NOOP. DAG size: 322 [2020-09-21 12:39:33,698 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 12:39:33,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:39:33,723 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:39:33,758 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:39:33,759 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-09-21 12:39:33,759 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:39:33,759 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 46 [2020-09-21 12:39:33,759 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:39:33,760 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 12:39:33,760 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 12:39:33,760 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 12:39:33,760 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 12:39:33,943 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 12:39:33,944 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1427489785] [2020-09-21 12:39:33,947 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-21 12:39:33,947 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-09-21 12:39:33,948 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [344832286] [2020-09-21 12:39:33,955 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-09-21 12:39:33,956 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 12:39:33,974 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-09-21 12:39:33,975 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-21 12:39:33,978 INFO L87 Difference]: Start difference. First operand 1027 states. Second operand 4 states. [2020-09-21 12:39:34,681 WARN L193 SmtUtils]: Spent 619.00 ms on a formula simplification that was a NOOP. DAG size: 323 [2020-09-21 12:39:42,685 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 12:39:42,685 INFO L93 Difference]: Finished difference Result 1794 states and 3183 transitions. [2020-09-21 12:39:42,686 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-09-21 12:39:42,688 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 327 [2020-09-21 12:39:42,691 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 12:39:42,726 INFO L225 Difference]: With dead ends: 1794 [2020-09-21 12:39:42,726 INFO L226 Difference]: Without dead ends: 1483 [2020-09-21 12:39:42,734 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-09-21 12:39:42,762 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1483 states. [2020-09-21 12:39:42,869 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1483 to 1481. [2020-09-21 12:39:42,871 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1481 states. [2020-09-21 12:39:42,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1481 states to 1481 states and 2263 transitions. [2020-09-21 12:39:42,883 INFO L78 Accepts]: Start accepts. Automaton has 1481 states and 2263 transitions. Word has length 327 [2020-09-21 12:39:42,884 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 12:39:42,885 INFO L479 AbstractCegarLoop]: Abstraction has 1481 states and 2263 transitions. [2020-09-21 12:39:42,885 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-09-21 12:39:42,885 INFO L276 IsEmpty]: Start isEmpty. Operand 1481 states and 2263 transitions. [2020-09-21 12:39:42,891 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 328 [2020-09-21 12:39:42,892 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 12:39:42,892 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] [2020-09-21 12:39:42,893 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-21 12:39:42,893 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr4ASSERT_VIOLATIONERROR_FUNCTION, mainErr11ASSERT_VIOLATIONERROR_FUNCTION, mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr7ASSERT_VIOLATIONERROR_FUNCTION, mainErr8ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr6ASSERT_VIOLATIONERROR_FUNCTION, mainErr9ASSERT_VIOLATIONERROR_FUNCTION, mainErr5ASSERT_VIOLATIONERROR_FUNCTION, mainErr10ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 12:39:42,894 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 12:39:42,894 INFO L82 PathProgramCache]: Analyzing trace with hash 297127498, now seen corresponding path program 1 times [2020-09-21 12:39:42,895 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 12:39:42,895 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [117718801] [2020-09-21 12:39:42,895 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 12:39:43,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:39:43,706 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:39:44,263 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:39:44,657 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:39:44,657 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 334 [2020-09-21 12:39:44,657 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-21 12:39:44,658 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1369 [2020-09-21 12:39:44,658 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:39:44,658 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-21 12:39:44,659 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 89 [2020-09-21 12:39:44,662 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 233 [2020-09-21 12:39:44,663 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-09-21 12:39:45,547 WARN L193 SmtUtils]: Spent 584.00 ms on a formula simplification that was a NOOP. DAG size: 322 [2020-09-21 12:39:45,550 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 12:39:45,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:39:45,571 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:39:45,604 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:39:45,604 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-09-21 12:39:45,605 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:39:45,605 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 43 [2020-09-21 12:39:45,605 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:39:45,605 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 12:39:45,606 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 12:39:45,606 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 12:39:45,606 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 12:39:45,797 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 12:39:45,797 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [117718801] [2020-09-21 12:39:45,798 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-21 12:39:45,798 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-09-21 12:39:45,798 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2111751926] [2020-09-21 12:39:45,801 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-09-21 12:39:45,801 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 12:39:45,801 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-09-21 12:39:45,802 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-21 12:39:45,802 INFO L87 Difference]: Start difference. First operand 1481 states and 2263 transitions. Second operand 4 states. [2020-09-21 12:39:46,481 WARN L193 SmtUtils]: Spent 633.00 ms on a formula simplification that was a NOOP. DAG size: 323 [2020-09-21 12:39:53,950 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 12:39:53,951 INFO L93 Difference]: Finished difference Result 2844 states and 4401 transitions. [2020-09-21 12:39:53,957 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-09-21 12:39:53,957 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 327 [2020-09-21 12:39:53,959 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 12:39:53,971 INFO L225 Difference]: With dead ends: 2844 [2020-09-21 12:39:53,971 INFO L226 Difference]: Without dead ends: 2425 [2020-09-21 12:39:53,978 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-09-21 12:39:53,983 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2425 states. [2020-09-21 12:39:54,059 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2425 to 2423. [2020-09-21 12:39:54,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2423 states. [2020-09-21 12:39:54,073 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2423 states to 2423 states and 3727 transitions. [2020-09-21 12:39:54,073 INFO L78 Accepts]: Start accepts. Automaton has 2423 states and 3727 transitions. Word has length 327 [2020-09-21 12:39:54,075 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 12:39:54,075 INFO L479 AbstractCegarLoop]: Abstraction has 2423 states and 3727 transitions. [2020-09-21 12:39:54,075 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-09-21 12:39:54,075 INFO L276 IsEmpty]: Start isEmpty. Operand 2423 states and 3727 transitions. [2020-09-21 12:39:54,083 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 328 [2020-09-21 12:39:54,083 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 12:39:54,083 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] [2020-09-21 12:39:54,084 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-21 12:39:54,089 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr4ASSERT_VIOLATIONERROR_FUNCTION, mainErr11ASSERT_VIOLATIONERROR_FUNCTION, mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr7ASSERT_VIOLATIONERROR_FUNCTION, mainErr8ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr6ASSERT_VIOLATIONERROR_FUNCTION, mainErr9ASSERT_VIOLATIONERROR_FUNCTION, mainErr5ASSERT_VIOLATIONERROR_FUNCTION, mainErr10ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 12:39:54,089 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 12:39:54,090 INFO L82 PathProgramCache]: Analyzing trace with hash -586459585, now seen corresponding path program 1 times [2020-09-21 12:39:54,090 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 12:39:54,090 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [282024600] [2020-09-21 12:39:54,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 12:39:54,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:39:54,602 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:39:55,078 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:39:55,366 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:39:55,367 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 334 [2020-09-21 12:39:55,367 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-21 12:39:55,367 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1023 [2020-09-21 12:39:55,367 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:39:55,367 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-21 12:39:55,368 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 90 [2020-09-21 12:39:55,368 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 241 [2020-09-21 12:39:55,368 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 12:39:56,355 WARN L193 SmtUtils]: Spent 652.00 ms on a formula simplification that was a NOOP. DAG size: 322 [2020-09-21 12:39:56,357 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 12:39:56,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:39:56,377 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:39:56,408 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:39:56,408 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-09-21 12:39:56,408 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:39:56,409 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 41 [2020-09-21 12:39:56,409 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:39:56,409 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 12:39:56,409 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 12:39:56,409 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 12:39:56,410 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 12:39:56,627 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 12:39:56,627 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [282024600] [2020-09-21 12:39:56,628 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-21 12:39:56,628 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-09-21 12:39:56,628 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1438457951] [2020-09-21 12:39:56,629 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-09-21 12:39:56,629 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 12:39:56,629 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-09-21 12:39:56,630 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-21 12:39:56,630 INFO L87 Difference]: Start difference. First operand 2423 states and 3727 transitions. Second operand 4 states. [2020-09-21 12:39:57,349 WARN L193 SmtUtils]: Spent 673.00 ms on a formula simplification that was a NOOP. DAG size: 323 [2020-09-21 12:40:04,690 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 12:40:04,692 INFO L93 Difference]: Finished difference Result 5038 states and 7854 transitions. [2020-09-21 12:40:04,696 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-09-21 12:40:04,697 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 327 [2020-09-21 12:40:04,698 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 12:40:04,719 INFO L225 Difference]: With dead ends: 5038 [2020-09-21 12:40:04,719 INFO L226 Difference]: Without dead ends: 4361 [2020-09-21 12:40:04,723 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-09-21 12:40:04,729 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4361 states. [2020-09-21 12:40:04,844 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4361 to 4359. [2020-09-21 12:40:04,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4359 states. [2020-09-21 12:40:04,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4359 states to 4359 states and 6733 transitions. [2020-09-21 12:40:04,858 INFO L78 Accepts]: Start accepts. Automaton has 4359 states and 6733 transitions. Word has length 327 [2020-09-21 12:40:04,859 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 12:40:04,859 INFO L479 AbstractCegarLoop]: Abstraction has 4359 states and 6733 transitions. [2020-09-21 12:40:04,859 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-09-21 12:40:04,859 INFO L276 IsEmpty]: Start isEmpty. Operand 4359 states and 6733 transitions. [2020-09-21 12:40:04,871 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 328 [2020-09-21 12:40:04,871 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 12:40:04,871 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] [2020-09-21 12:40:04,872 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-09-21 12:40:04,872 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr4ASSERT_VIOLATIONERROR_FUNCTION, mainErr11ASSERT_VIOLATIONERROR_FUNCTION, mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr7ASSERT_VIOLATIONERROR_FUNCTION, mainErr8ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr6ASSERT_VIOLATIONERROR_FUNCTION, mainErr9ASSERT_VIOLATIONERROR_FUNCTION, mainErr5ASSERT_VIOLATIONERROR_FUNCTION, mainErr10ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 12:40:04,873 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 12:40:04,873 INFO L82 PathProgramCache]: Analyzing trace with hash -586798209, now seen corresponding path program 1 times [2020-09-21 12:40:04,873 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 12:40:04,874 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2101499112] [2020-09-21 12:40:04,874 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 12:40:05,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:40:05,584 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:40:06,038 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:40:06,317 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:40:06,317 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 334 [2020-09-21 12:40:06,318 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-21 12:40:06,318 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1122 [2020-09-21 12:40:06,318 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:40:06,318 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-09-21 12:40:06,318 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-09-21 12:40:06,320 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 100 [2020-09-21 12:40:06,323 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-09-21 12:40:07,404 WARN L193 SmtUtils]: Spent 779.00 ms on a formula simplification that was a NOOP. DAG size: 322 [2020-09-21 12:40:07,406 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 12:40:07,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:40:07,443 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:40:07,495 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:40:07,495 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-09-21 12:40:07,495 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:40:07,496 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 63 [2020-09-21 12:40:07,496 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:40:07,497 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 12:40:07,497 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 12:40:07,497 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 12:40:07,498 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-21 12:40:07,831 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 12:40:07,842 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2101499112] [2020-09-21 12:40:07,842 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-21 12:40:07,843 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-09-21 12:40:07,843 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [157281618] [2020-09-21 12:40:07,844 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-21 12:40:07,845 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 12:40:07,845 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-21 12:40:07,845 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-09-21 12:40:07,845 INFO L87 Difference]: Start difference. First operand 4359 states and 6733 transitions. Second operand 5 states.