/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --rcfgbuilder.size.of.a.code.block SingleStatement --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=LOWLEXORDER --traceabstraction.additional.smt.options log-additional-information=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_floodmax.3.1.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-c90d42b [2020-09-24 21:53:35,387 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-24 21:53:35,391 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-24 21:53:35,438 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-24 21:53:35,440 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-24 21:53:35,451 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-24 21:53:35,452 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-24 21:53:35,454 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-24 21:53:35,458 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-24 21:53:35,462 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-24 21:53:35,463 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-24 21:53:35,465 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-24 21:53:35,466 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-24 21:53:35,469 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-24 21:53:35,472 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-24 21:53:35,473 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-24 21:53:35,474 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-24 21:53:35,476 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-24 21:53:35,478 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-24 21:53:35,486 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-24 21:53:35,489 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-24 21:53:35,491 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-24 21:53:35,492 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-24 21:53:35,493 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-24 21:53:35,497 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-09-24 21:53:35,497 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-09-24 21:53:35,497 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-09-24 21:53:35,500 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-09-24 21:53:35,501 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-09-24 21:53:35,502 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-09-24 21:53:35,503 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-09-24 21:53:35,504 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-09-24 21:53:35,505 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-09-24 21:53:35,506 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-09-24 21:53:35,507 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-09-24 21:53:35,507 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-09-24 21:53:35,508 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-09-24 21:53:35,509 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-09-24 21:53:35,509 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-24 21:53:35,510 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-24 21:53:35,512 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-24 21:53:35,513 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-09-24 21:53:35,567 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-24 21:53:35,567 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-24 21:53:35,570 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-09-24 21:53:35,570 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-09-24 21:53:35,570 INFO L138 SettingsManager]: * Use SBE=true [2020-09-24 21:53:35,571 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-24 21:53:35,571 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-24 21:53:35,571 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-24 21:53:35,572 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-24 21:53:35,572 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-24 21:53:35,573 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-24 21:53:35,573 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-24 21:53:35,574 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-24 21:53:35,574 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-24 21:53:35,574 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-24 21:53:35,575 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-24 21:53:35,575 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-24 21:53:35,575 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-24 21:53:35,575 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-09-24 21:53:35,576 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-24 21:53:35,576 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-24 21:53:35,576 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-24 21:53:35,576 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-24 21:53:35,577 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-09-24 21:53:35,577 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-09-24 21:53:35,577 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-09-24 21:53:35,577 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-09-24 21:53:35,577 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-24 21:53:35,578 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-09-24 21:53:35,578 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SingleStatement Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=LOWLEXORDER;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=LOWLEXORDER;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=LOWLEXORDER;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=LOWLEXORDER;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=LOWLEXORDER;log-additional-information=true; [2020-09-24 21:53:36,071 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-24 21:53:36,096 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-24 21:53:36,101 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-24 21:53:36,104 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-24 21:53:36,105 INFO L275 PluginConnector]: CDTParser initialized [2020-09-24 21:53:36,106 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_floodmax.3.1.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c [2020-09-24 21:53:36,203 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/8c11748a6/10c8e7e8d91348c8938b6d3ce617d29f/FLAG0c4406aa7 [2020-09-24 21:53:36,893 INFO L306 CDTParser]: Found 1 translation units. [2020-09-24 21:53:36,894 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/seq-mthreaded-reduced/pals_floodmax.3.1.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c [2020-09-24 21:53:36,926 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/8c11748a6/10c8e7e8d91348c8938b6d3ce617d29f/FLAG0c4406aa7 [2020-09-24 21:53:37,146 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/8c11748a6/10c8e7e8d91348c8938b6d3ce617d29f [2020-09-24 21:53:37,159 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-24 21:53:37,165 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-24 21:53:37,166 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-24 21:53:37,166 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-24 21:53:37,171 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-24 21:53:37,172 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.09 09:53:37" (1/1) ... [2020-09-24 21:53:37,176 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@ac328e4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:53:37, skipping insertion in model container [2020-09-24 21:53:37,176 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.09 09:53:37" (1/1) ... [2020-09-24 21:53:37,186 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-24 21:53:37,246 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-24 21:53:37,847 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-24 21:53:37,862 INFO L203 MainTranslator]: Completed pre-run [2020-09-24 21:53:38,043 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-24 21:53:38,069 INFO L208 MainTranslator]: Completed translation [2020-09-24 21:53:38,070 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:53:38 WrapperNode [2020-09-24 21:53:38,070 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-24 21:53:38,071 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-24 21:53:38,071 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-24 21:53:38,071 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-24 21:53:38,087 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:53:38" (1/1) ... [2020-09-24 21:53:38,088 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:53:38" (1/1) ... [2020-09-24 21:53:38,106 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:53:38" (1/1) ... [2020-09-24 21:53:38,107 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:53:38" (1/1) ... [2020-09-24 21:53:38,134 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:53:38" (1/1) ... [2020-09-24 21:53:38,156 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:53:38" (1/1) ... [2020-09-24 21:53:38,160 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:53:38" (1/1) ... [2020-09-24 21:53:38,168 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-24 21:53:38,169 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-24 21:53:38,169 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-24 21:53:38,169 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-24 21:53:38,170 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:53:38" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-24 21:53:38,263 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-24 21:53:38,263 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-24 21:53:38,264 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-09-24 21:53:38,264 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-24 21:53:38,264 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-24 21:53:38,265 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-09-24 21:53:38,265 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uchar [2020-09-24 21:53:38,265 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-09-24 21:53:38,267 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2020-09-24 21:53:38,268 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-09-24 21:53:38,268 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-09-24 21:53:38,268 INFO L130 BoogieDeclarations]: Found specification of procedure read [2020-09-24 21:53:38,268 INFO L130 BoogieDeclarations]: Found specification of procedure write [2020-09-24 21:53:38,268 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2020-09-24 21:53:38,268 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2020-09-24 21:53:38,270 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2020-09-24 21:53:38,270 INFO L130 BoogieDeclarations]: Found specification of procedure init [2020-09-24 21:53:38,270 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-09-24 21:53:38,270 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-24 21:53:38,271 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-24 21:53:38,271 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-24 21:53:39,808 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-24 21:53:39,809 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-09-24 21:53:39,820 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.09 09:53:39 BoogieIcfgContainer [2020-09-24 21:53:39,821 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-24 21:53:39,822 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-24 21:53:39,822 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-24 21:53:39,826 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-24 21:53:39,826 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.09 09:53:37" (1/3) ... [2020-09-24 21:53:39,827 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5ff8f5c2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.09 09:53:39, skipping insertion in model container [2020-09-24 21:53:39,828 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:53:38" (2/3) ... [2020-09-24 21:53:39,828 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5ff8f5c2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.09 09:53:39, skipping insertion in model container [2020-09-24 21:53:39,828 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.09 09:53:39" (3/3) ... [2020-09-24 21:53:39,831 INFO L109 eAbstractionObserver]: Analyzing ICFG pals_floodmax.3.1.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c [2020-09-24 21:53:39,844 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-24 21:53:39,856 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-24 21:53:39,880 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-09-24 21:53:39,918 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-24 21:53:39,918 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-24 21:53:39,919 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-09-24 21:53:39,919 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-24 21:53:39,919 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-24 21:53:39,919 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-24 21:53:39,919 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-24 21:53:39,919 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-24 21:53:39,960 INFO L276 IsEmpty]: Start isEmpty. Operand 813 states. [2020-09-24 21:53:39,986 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 408 [2020-09-24 21:53:39,987 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 21:53:39,989 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] [2020-09-24 21:53:39,989 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 21:53:39,998 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 21:53:39,999 INFO L82 PathProgramCache]: Analyzing trace with hash -361300248, now seen corresponding path program 1 times [2020-09-24 21:53:40,009 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 21:53:40,009 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [472993674] [2020-09-24 21:53:40,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 21:53:40,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:53:41,019 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:53:41,373 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:53:41,610 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:53:41,846 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:53:42,049 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:53:42,183 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:53:42,631 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:53:44,946 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:53:45,767 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:53:45,767 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 414 [2020-09-24 21:53:45,767 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-09-24 21:53:45,768 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5019 [2020-09-24 21:53:45,772 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:53:45,772 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-09-24 21:53:45,772 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 158 [2020-09-24 21:53:45,773 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 65 [2020-09-24 21:53:45,773 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 5 [2020-09-24 21:53:46,444 WARN L193 SmtUtils]: Spent 264.00 ms on a formula simplification that was a NOOP. DAG size: 166 [2020-09-24 21:53:46,446 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 21:53:46,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:53:46,464 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:53:46,501 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:53:46,502 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 64 [2020-09-24 21:53:46,502 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 21:53:46,502 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 45 [2020-09-24 21:53:46,502 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:53:46,503 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 21:53:46,503 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 21:53:46,503 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 21:53:46,503 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 21:53:46,875 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 21:53:46,876 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [472993674] [2020-09-24 21:53:46,878 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-24 21:53:46,879 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-09-24 21:53:46,880 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [964181889] [2020-09-24 21:53:46,891 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-24 21:53:46,891 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 21:53:46,909 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-24 21:53:46,911 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-09-24 21:53:46,914 INFO L87 Difference]: Start difference. First operand 813 states. Second operand 5 states. [2020-09-24 21:53:52,337 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 21:53:52,338 INFO L93 Difference]: Finished difference Result 2066 states and 2749 transitions. [2020-09-24 21:53:52,339 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-09-24 21:53:52,341 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 407 [2020-09-24 21:53:52,342 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 21:53:52,373 INFO L225 Difference]: With dead ends: 2066 [2020-09-24 21:53:52,373 INFO L226 Difference]: Without dead ends: 1236 [2020-09-24 21:53:52,384 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 21:53:52,406 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1236 states. [2020-09-24 21:53:52,514 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1236 to 1234. [2020-09-24 21:53:52,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1234 states. [2020-09-24 21:53:52,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1234 states to 1234 states and 1502 transitions. [2020-09-24 21:53:52,525 INFO L78 Accepts]: Start accepts. Automaton has 1234 states and 1502 transitions. Word has length 407 [2020-09-24 21:53:52,526 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 21:53:52,526 INFO L479 AbstractCegarLoop]: Abstraction has 1234 states and 1502 transitions. [2020-09-24 21:53:52,530 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-24 21:53:52,530 INFO L276 IsEmpty]: Start isEmpty. Operand 1234 states and 1502 transitions. [2020-09-24 21:53:52,561 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 409 [2020-09-24 21:53:52,562 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 21:53:52,562 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] [2020-09-24 21:53:52,563 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-24 21:53:52,563 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 21:53:52,563 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 21:53:52,563 INFO L82 PathProgramCache]: Analyzing trace with hash 1024696889, now seen corresponding path program 1 times [2020-09-24 21:53:52,564 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 21:53:52,564 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1793922548] [2020-09-24 21:53:52,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 21:53:52,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:53:52,709 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:53:52,836 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:53:52,980 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:53:53,112 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:53:53,226 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:53:53,326 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:53:54,229 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:53:54,557 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:53:57,646 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:53:57,646 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 415 [2020-09-24 21:53:57,647 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-09-24 21:53:57,647 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5011 [2020-09-24 21:53:57,648 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:53:57,648 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-09-24 21:53:57,648 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 159 [2020-09-24 21:53:57,649 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 66 [2020-09-24 21:53:57,649 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 21:53:58,154 WARN L193 SmtUtils]: Spent 216.00 ms on a formula simplification that was a NOOP. DAG size: 166 [2020-09-24 21:53:58,156 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 21:53:58,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:53:58,170 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:53:58,206 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:53:58,206 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 64 [2020-09-24 21:53:58,206 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 21:53:58,206 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 43 [2020-09-24 21:53:58,207 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:53:58,207 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 21:53:58,207 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 21:53:58,207 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 21:53:58,208 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 21:53:58,457 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 21:53:58,458 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1793922548] [2020-09-24 21:53:58,458 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-24 21:53:58,458 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-09-24 21:53:58,459 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [877811014] [2020-09-24 21:53:58,461 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-24 21:53:58,462 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 21:53:58,462 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-24 21:53:58,462 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-09-24 21:53:58,463 INFO L87 Difference]: Start difference. First operand 1234 states and 1502 transitions. Second operand 5 states. [2020-09-24 21:54:03,527 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 21:54:03,528 INFO L93 Difference]: Finished difference Result 3263 states and 4026 transitions. [2020-09-24 21:54:03,530 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-09-24 21:54:03,530 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 408 [2020-09-24 21:54:03,531 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 21:54:03,543 INFO L225 Difference]: With dead ends: 3263 [2020-09-24 21:54:03,543 INFO L226 Difference]: Without dead ends: 2235 [2020-09-24 21:54:03,547 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 21:54:03,550 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2235 states. [2020-09-24 21:54:03,633 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2235 to 2233. [2020-09-24 21:54:03,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2233 states. [2020-09-24 21:54:03,643 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2233 states to 2233 states and 2734 transitions. [2020-09-24 21:54:03,643 INFO L78 Accepts]: Start accepts. Automaton has 2233 states and 2734 transitions. Word has length 408 [2020-09-24 21:54:03,644 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 21:54:03,644 INFO L479 AbstractCegarLoop]: Abstraction has 2233 states and 2734 transitions. [2020-09-24 21:54:03,644 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-24 21:54:03,645 INFO L276 IsEmpty]: Start isEmpty. Operand 2233 states and 2734 transitions. [2020-09-24 21:54:03,654 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 410 [2020-09-24 21:54:03,654 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 21:54:03,654 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] [2020-09-24 21:54:03,655 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-24 21:54:03,655 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 21:54:03,655 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 21:54:03,655 INFO L82 PathProgramCache]: Analyzing trace with hash -1169505706, now seen corresponding path program 1 times [2020-09-24 21:54:03,656 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 21:54:03,656 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [47197901] [2020-09-24 21:54:03,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 21:54:03,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:54:03,950 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:54:04,196 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:54:04,341 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:54:04,483 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:54:04,862 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:54:05,126 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:54:05,977 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:54:06,341 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:54:06,923 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:54:07,267 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:54:08,789 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:54:08,790 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 416 [2020-09-24 21:54:08,790 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 10 [2020-09-24 21:54:08,790 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5008 [2020-09-24 21:54:08,791 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:54:08,792 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-09-24 21:54:08,792 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 160 [2020-09-24 21:54:08,792 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 70 [2020-09-24 21:54:08,793 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 21:54:09,221 WARN L193 SmtUtils]: Spent 223.00 ms on a formula simplification that was a NOOP. DAG size: 166 [2020-09-24 21:54:09,222 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 21:54:09,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:54:09,238 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:54:09,273 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:54:09,273 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 64 [2020-09-24 21:54:09,274 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 21:54:09,274 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 42 [2020-09-24 21:54:09,274 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:54:09,274 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 21:54:09,274 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 21:54:09,275 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 21:54:09,275 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 21:54:09,505 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 21:54:09,505 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [47197901] [2020-09-24 21:54:09,506 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-24 21:54:09,506 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-09-24 21:54:09,506 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1666321267] [2020-09-24 21:54:09,507 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-24 21:54:09,508 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 21:54:09,508 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-24 21:54:09,509 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-09-24 21:54:09,509 INFO L87 Difference]: Start difference. First operand 2233 states and 2734 transitions. Second operand 5 states. [2020-09-24 21:54:13,638 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 21:54:13,639 INFO L93 Difference]: Finished difference Result 6105 states and 7516 transitions. [2020-09-24 21:54:13,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-09-24 21:54:13,640 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 409 [2020-09-24 21:54:13,640 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 21:54:13,659 INFO L225 Difference]: With dead ends: 6105 [2020-09-24 21:54:13,659 INFO L226 Difference]: Without dead ends: 4111 [2020-09-24 21:54:13,664 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 21:54:13,668 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4111 states. [2020-09-24 21:54:13,818 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4111 to 4109. [2020-09-24 21:54:13,818 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4109 states. [2020-09-24 21:54:13,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4109 states to 4109 states and 5020 transitions. [2020-09-24 21:54:13,834 INFO L78 Accepts]: Start accepts. Automaton has 4109 states and 5020 transitions. Word has length 409 [2020-09-24 21:54:13,835 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 21:54:13,835 INFO L479 AbstractCegarLoop]: Abstraction has 4109 states and 5020 transitions. [2020-09-24 21:54:13,835 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-24 21:54:13,836 INFO L276 IsEmpty]: Start isEmpty. Operand 4109 states and 5020 transitions. [2020-09-24 21:54:13,851 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 411 [2020-09-24 21:54:13,851 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 21:54:13,852 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] [2020-09-24 21:54:13,852 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-09-24 21:54:13,853 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 21:54:13,857 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 21:54:13,858 INFO L82 PathProgramCache]: Analyzing trace with hash 1907351519, now seen corresponding path program 1 times [2020-09-24 21:54:13,859 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 21:54:13,860 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1133130083] [2020-09-24 21:54:13,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 21:54:13,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:54:13,991 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:54:14,105 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:54:14,242 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:54:14,484 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:54:14,720 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:54:15,154 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:54:15,477 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:54:16,719 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:54:16,837 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:54:17,074 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:54:18,005 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:54:18,983 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:54:18,983 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 417 [2020-09-24 21:54:18,983 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 11 [2020-09-24 21:54:18,984 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5053 [2020-09-24 21:54:18,985 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:54:18,985 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-09-24 21:54:18,986 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 161 [2020-09-24 21:54:18,986 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 71 [2020-09-24 21:54:18,986 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-09-24 21:54:19,423 WARN L193 SmtUtils]: Spent 238.00 ms on a formula simplification that was a NOOP. DAG size: 166 [2020-09-24 21:54:19,424 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 21:54:19,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:54:19,438 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:54:19,469 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:54:19,470 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 64 [2020-09-24 21:54:19,470 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 21:54:19,470 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 38 [2020-09-24 21:54:19,470 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:54:19,470 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 21:54:19,471 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 21:54:19,471 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 21:54:19,471 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 21:54:19,638 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 21:54:19,639 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1133130083] [2020-09-24 21:54:19,639 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-24 21:54:19,639 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-09-24 21:54:19,639 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [537230173] [2020-09-24 21:54:19,640 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-24 21:54:19,641 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 21:54:19,641 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-24 21:54:19,641 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-09-24 21:54:19,641 INFO L87 Difference]: Start difference. First operand 4109 states and 5020 transitions. Second operand 5 states.