/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=HIGHLEXORDER --traceabstraction.additional.smt.options log-additional-information=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.3.1.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-c90d42b [2020-09-24 22:58:57,450 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-24 22:58:57,454 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-24 22:58:57,479 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-24 22:58:57,479 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-24 22:58:57,480 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-24 22:58:57,482 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-24 22:58:57,483 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-24 22:58:57,485 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-24 22:58:57,486 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-24 22:58:57,487 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-24 22:58:57,488 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-24 22:58:57,488 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-24 22:58:57,489 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-24 22:58:57,491 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-24 22:58:57,492 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-24 22:58:57,493 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-24 22:58:57,494 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-24 22:58:57,495 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-24 22:58:57,497 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-24 22:58:57,499 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-24 22:58:57,500 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-24 22:58:57,501 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-24 22:58:57,502 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-24 22:58:57,504 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-09-24 22:58:57,505 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-09-24 22:58:57,505 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-09-24 22:58:57,506 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-09-24 22:58:57,507 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-09-24 22:58:57,508 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-09-24 22:58:57,508 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-09-24 22:58:57,509 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-09-24 22:58:57,509 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-09-24 22:58:57,510 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-09-24 22:58:57,511 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-09-24 22:58:57,512 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-09-24 22:58:57,512 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-09-24 22:58:57,513 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-09-24 22:58:57,513 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-24 22:58:57,514 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-24 22:58:57,514 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-24 22:58:57,515 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 22:58:57,540 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-24 22:58:57,540 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-24 22:58:57,541 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-09-24 22:58:57,541 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-09-24 22:58:57,541 INFO L138 SettingsManager]: * Use SBE=true [2020-09-24 22:58:57,542 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-24 22:58:57,542 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-24 22:58:57,542 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-24 22:58:57,542 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-24 22:58:57,542 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-24 22:58:57,543 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-24 22:58:57,543 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-24 22:58:57,543 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-24 22:58:57,543 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-24 22:58:57,543 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-24 22:58:57,544 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-24 22:58:57,544 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-24 22:58:57,544 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-24 22:58:57,544 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-09-24 22:58:57,544 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-24 22:58:57,545 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-24 22:58:57,545 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-24 22:58:57,545 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-24 22:58:57,545 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-09-24 22:58:57,545 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-09-24 22:58:57,546 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-09-24 22:58:57,546 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-09-24 22:58:57,546 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-24 22:58:57,546 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-09-24 22:58:57,546 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=HIGHLEXORDER;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=HIGHLEXORDER;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=HIGHLEXORDER;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=HIGHLEXORDER;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=HIGHLEXORDER;log-additional-information=true; [2020-09-24 22:58:57,971 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-24 22:58:57,994 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-24 22:58:57,998 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-24 22:58:58,000 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-24 22:58:58,001 INFO L275 PluginConnector]: CDTParser initialized [2020-09-24 22:58:58,002 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.3.1.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c [2020-09-24 22:58:58,078 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/0d8e542aa/d6a718832b044db4bd0feb1990eaf7c6/FLAG9b2ac1b4a [2020-09-24 22:58:58,769 INFO L306 CDTParser]: Found 1 translation units. [2020-09-24 22:58:58,770 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.3.1.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c [2020-09-24 22:58:58,788 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/0d8e542aa/d6a718832b044db4bd0feb1990eaf7c6/FLAG9b2ac1b4a [2020-09-24 22:58:59,008 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/0d8e542aa/d6a718832b044db4bd0feb1990eaf7c6 [2020-09-24 22:58:59,021 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-24 22:58:59,025 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-24 22:58:59,026 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-24 22:58:59,026 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-24 22:58:59,031 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-24 22:58:59,032 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.09 10:58:59" (1/1) ... [2020-09-24 22:58:59,036 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7f98ced9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 10:58:59, skipping insertion in model container [2020-09-24 22:58:59,036 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.09 10:58:59" (1/1) ... [2020-09-24 22:58:59,046 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-24 22:58:59,123 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-24 22:58:59,680 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-24 22:58:59,694 INFO L203 MainTranslator]: Completed pre-run [2020-09-24 22:58:59,875 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-24 22:58:59,897 INFO L208 MainTranslator]: Completed translation [2020-09-24 22:58:59,897 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 10:58:59 WrapperNode [2020-09-24 22:58:59,897 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-24 22:58:59,898 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-24 22:58:59,898 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-24 22:58:59,898 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-24 22:58:59,912 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 10:58:59" (1/1) ... [2020-09-24 22:58:59,912 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 10:58:59" (1/1) ... [2020-09-24 22:58:59,931 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 10:58:59" (1/1) ... [2020-09-24 22:58:59,931 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 10:58:59" (1/1) ... [2020-09-24 22:58:59,960 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 10:58:59" (1/1) ... [2020-09-24 22:58:59,984 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 10:58:59" (1/1) ... [2020-09-24 22:58:59,989 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 10:58:59" (1/1) ... [2020-09-24 22:58:59,996 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-24 22:58:59,997 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-24 22:58:59,997 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-24 22:58:59,997 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-24 22:58:59,999 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 10:58:59" (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 22:59:00,100 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-24 22:59:00,100 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-24 22:59:00,101 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-09-24 22:59:00,101 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-24 22:59:00,101 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-24 22:59:00,102 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-09-24 22:59:00,102 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uchar [2020-09-24 22:59:00,102 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-09-24 22:59:00,103 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2020-09-24 22:59:00,103 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-09-24 22:59:00,104 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-09-24 22:59:00,104 INFO L130 BoogieDeclarations]: Found specification of procedure read [2020-09-24 22:59:00,104 INFO L130 BoogieDeclarations]: Found specification of procedure write [2020-09-24 22:59:00,104 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2020-09-24 22:59:00,104 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2020-09-24 22:59:00,105 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2020-09-24 22:59:00,106 INFO L130 BoogieDeclarations]: Found specification of procedure init [2020-09-24 22:59:00,106 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-09-24 22:59:00,106 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-24 22:59:00,106 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-24 22:59:00,106 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-24 22:59:01,846 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-24 22:59:01,847 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-09-24 22:59:01,862 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.09 10:59:01 BoogieIcfgContainer [2020-09-24 22:59:01,863 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-24 22:59:01,864 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-24 22:59:01,864 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-24 22:59:01,868 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-24 22:59:01,868 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.09 10:58:59" (1/3) ... [2020-09-24 22:59:01,869 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4d7b2eeb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.09 10:59:01, skipping insertion in model container [2020-09-24 22:59:01,869 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 10:58:59" (2/3) ... [2020-09-24 22:59:01,870 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4d7b2eeb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.09 10:59:01, skipping insertion in model container [2020-09-24 22:59:01,870 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.09 10:59:01" (3/3) ... [2020-09-24 22:59:01,872 INFO L109 eAbstractionObserver]: Analyzing ICFG pals_opt-floodmax.3.1.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c [2020-09-24 22:59:01,885 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-24 22:59:01,897 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-24 22:59:01,921 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-09-24 22:59:01,956 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-24 22:59:01,957 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-24 22:59:01,957 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-09-24 22:59:01,957 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-24 22:59:01,957 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-24 22:59:01,958 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-24 22:59:01,958 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-24 22:59:01,958 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-24 22:59:01,999 INFO L276 IsEmpty]: Start isEmpty. Operand 903 states. [2020-09-24 22:59:02,029 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 450 [2020-09-24 22:59:02,029 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 22:59:02,031 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 22:59:02,032 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 22:59:02,039 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 22:59:02,040 INFO L82 PathProgramCache]: Analyzing trace with hash 1632941541, now seen corresponding path program 1 times [2020-09-24 22:59:02,052 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 22:59:02,052 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1442956824] [2020-09-24 22:59:02,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 22:59:02,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 22:59:02,882 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 22:59:03,238 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 22:59:03,521 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 22:59:03,748 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 22:59:03,921 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 22:59:04,168 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 22:59:04,665 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 22:59:07,243 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 22:59:07,593 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 22:59:07,673 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 22:59:07,674 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 456 [2020-09-24 22:59:07,674 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-09-24 22:59:07,674 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5048 [2020-09-24 22:59:07,678 FATAL L256 erpolLogProxyWrapper]: Heuristic: HIGHLEXORDER [2020-09-24 22:59:07,678 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-24 22:59:07,679 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 200 [2020-09-24 22:59:07,680 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 207 [2020-09-24 22:59:07,680 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 5 [2020-09-24 22:59:08,289 WARN L193 SmtUtils]: Spent 285.00 ms on a formula simplification that was a NOOP. DAG size: 175 [2020-09-24 22:59:08,295 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 22:59:08,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 22:59:08,328 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 22:59:08,379 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 22:59:08,380 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 67 [2020-09-24 22:59:08,380 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 22:59:08,381 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 61 [2020-09-24 22:59:08,381 FATAL L256 erpolLogProxyWrapper]: Heuristic: HIGHLEXORDER [2020-09-24 22:59:08,382 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 22:59:08,382 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 22:59:08,382 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 22:59:08,383 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 22:59:08,891 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 22:59:08,892 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1442956824] [2020-09-24 22:59:08,894 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-24 22:59:08,894 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-09-24 22:59:08,896 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2037257656] [2020-09-24 22:59:08,906 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-09-24 22:59:08,907 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 22:59:08,925 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-09-24 22:59:08,926 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-24 22:59:08,929 INFO L87 Difference]: Start difference. First operand 903 states. Second operand 4 states. [2020-09-24 22:59:12,103 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 22:59:12,103 INFO L93 Difference]: Finished difference Result 1657 states and 2169 transitions. [2020-09-24 22:59:12,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-09-24 22:59:12,110 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 449 [2020-09-24 22:59:12,114 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 22:59:12,144 INFO L225 Difference]: With dead ends: 1657 [2020-09-24 22:59:12,144 INFO L226 Difference]: Without dead ends: 1241 [2020-09-24 22:59:12,155 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-24 22:59:12,185 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1241 states. [2020-09-24 22:59:12,291 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1241 to 1234. [2020-09-24 22:59:12,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1234 states. [2020-09-24 22:59:12,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1234 states to 1234 states and 1513 transitions. [2020-09-24 22:59:12,301 INFO L78 Accepts]: Start accepts. Automaton has 1234 states and 1513 transitions. Word has length 449 [2020-09-24 22:59:12,302 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 22:59:12,302 INFO L479 AbstractCegarLoop]: Abstraction has 1234 states and 1513 transitions. [2020-09-24 22:59:12,302 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-09-24 22:59:12,302 INFO L276 IsEmpty]: Start isEmpty. Operand 1234 states and 1513 transitions. [2020-09-24 22:59:12,313 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 450 [2020-09-24 22:59:12,314 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 22:59:12,315 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 22:59:12,315 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-24 22:59:12,315 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 22:59:12,316 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 22:59:12,316 INFO L82 PathProgramCache]: Analyzing trace with hash -1248222459, now seen corresponding path program 1 times [2020-09-24 22:59:12,316 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 22:59:12,316 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1926625054] [2020-09-24 22:59:12,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 22:59:12,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 22:59:12,548 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 22:59:12,760 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 22:59:12,905 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 22:59:13,038 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 22:59:13,158 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 22:59:13,279 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 22:59:13,606 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 22:59:15,850 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 22:59:16,192 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 22:59:17,450 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 22:59:17,451 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 456 [2020-09-24 22:59:17,451 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-09-24 22:59:17,452 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5027 [2020-09-24 22:59:17,453 FATAL L256 erpolLogProxyWrapper]: Heuristic: HIGHLEXORDER [2020-09-24 22:59:17,453 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-24 22:59:17,453 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 201 [2020-09-24 22:59:17,454 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 218 [2020-09-24 22:59:17,454 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 22:59:17,854 WARN L193 SmtUtils]: Spent 174.00 ms on a formula simplification that was a NOOP. DAG size: 175 [2020-09-24 22:59:17,855 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 22:59:17,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 22:59:17,868 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 22:59:17,903 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 22:59:17,903 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 67 [2020-09-24 22:59:17,903 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 22:59:17,904 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 42 [2020-09-24 22:59:17,904 FATAL L256 erpolLogProxyWrapper]: Heuristic: HIGHLEXORDER [2020-09-24 22:59:17,904 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 22:59:17,904 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 22:59:17,905 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 22:59:17,905 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 22:59:18,293 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 22:59:18,294 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1926625054] [2020-09-24 22:59:18,294 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-24 22:59:18,295 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-09-24 22:59:18,295 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1737576914] [2020-09-24 22:59:18,298 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-09-24 22:59:18,299 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 22:59:18,299 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-09-24 22:59:18,300 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-24 22:59:18,300 INFO L87 Difference]: Start difference. First operand 1234 states and 1513 transitions. Second operand 4 states. [2020-09-24 22:59:21,045 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 22:59:21,046 INFO L93 Difference]: Finished difference Result 2498 states and 3152 transitions. [2020-09-24 22:59:21,047 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-09-24 22:59:21,047 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 449 [2020-09-24 22:59:21,048 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 22:59:21,058 INFO L225 Difference]: With dead ends: 2498 [2020-09-24 22:59:21,058 INFO L226 Difference]: Without dead ends: 2052 [2020-09-24 22:59:21,067 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-24 22:59:21,071 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2052 states. [2020-09-24 22:59:21,123 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2052 to 2040. [2020-09-24 22:59:21,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2040 states. [2020-09-24 22:59:21,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2040 states to 2040 states and 2543 transitions. [2020-09-24 22:59:21,133 INFO L78 Accepts]: Start accepts. Automaton has 2040 states and 2543 transitions. Word has length 449 [2020-09-24 22:59:21,134 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 22:59:21,134 INFO L479 AbstractCegarLoop]: Abstraction has 2040 states and 2543 transitions. [2020-09-24 22:59:21,134 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-09-24 22:59:21,135 INFO L276 IsEmpty]: Start isEmpty. Operand 2040 states and 2543 transitions. [2020-09-24 22:59:21,146 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 450 [2020-09-24 22:59:21,146 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 22:59:21,147 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 22:59:21,147 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-24 22:59:21,147 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 22:59:21,148 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 22:59:21,148 INFO L82 PathProgramCache]: Analyzing trace with hash 1103013733, now seen corresponding path program 1 times [2020-09-24 22:59:21,148 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 22:59:21,149 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [400476284] [2020-09-24 22:59:21,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 22:59:21,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 22:59:21,356 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 22:59:21,518 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 22:59:21,654 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 22:59:21,787 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 22:59:21,907 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 22:59:22,015 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 22:59:23,075 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 22:59:23,305 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 22:59:25,811 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 22:59:26,100 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 22:59:26,269 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 22:59:26,270 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 456 [2020-09-24 22:59:26,270 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 10 [2020-09-24 22:59:26,270 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5013 [2020-09-24 22:59:26,271 FATAL L256 erpolLogProxyWrapper]: Heuristic: HIGHLEXORDER [2020-09-24 22:59:26,271 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-09-24 22:59:26,271 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 172 [2020-09-24 22:59:26,271 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 129 [2020-09-24 22:59:26,271 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 22:59:26,754 WARN L193 SmtUtils]: Spent 278.00 ms on a formula simplification that was a NOOP. DAG size: 175 [2020-09-24 22:59:26,755 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 22:59:26,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 22:59:26,770 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 22:59:26,810 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 22:59:26,810 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 67 [2020-09-24 22:59:26,810 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 22:59:26,811 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 47 [2020-09-24 22:59:26,811 FATAL L256 erpolLogProxyWrapper]: Heuristic: HIGHLEXORDER [2020-09-24 22:59:26,811 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 22:59:26,812 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 22:59:26,812 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 22:59:26,813 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 22:59:27,107 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 22:59:27,108 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [400476284] [2020-09-24 22:59:27,108 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-24 22:59:27,108 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-09-24 22:59:27,109 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [319392349] [2020-09-24 22:59:27,109 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-24 22:59:27,110 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 22:59:27,110 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-24 22:59:27,110 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-09-24 22:59:27,111 INFO L87 Difference]: Start difference. First operand 2040 states and 2543 transitions. Second operand 5 states. [2020-09-24 22:59:31,364 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 22:59:31,365 INFO L93 Difference]: Finished difference Result 5622 states and 7071 transitions. [2020-09-24 22:59:31,365 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-09-24 22:59:31,366 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 449 [2020-09-24 22:59:31,366 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 22:59:31,382 INFO L225 Difference]: With dead ends: 5622 [2020-09-24 22:59:31,383 INFO L226 Difference]: Without dead ends: 3786 [2020-09-24 22:59:31,387 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 22:59:31,391 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3786 states. [2020-09-24 22:59:31,480 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3786 to 3784. [2020-09-24 22:59:31,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3784 states. [2020-09-24 22:59:31,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3784 states to 3784 states and 4723 transitions. [2020-09-24 22:59:31,492 INFO L78 Accepts]: Start accepts. Automaton has 3784 states and 4723 transitions. Word has length 449 [2020-09-24 22:59:31,493 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 22:59:31,493 INFO L479 AbstractCegarLoop]: Abstraction has 3784 states and 4723 transitions. [2020-09-24 22:59:31,493 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-24 22:59:31,493 INFO L276 IsEmpty]: Start isEmpty. Operand 3784 states and 4723 transitions. [2020-09-24 22:59:31,500 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 451 [2020-09-24 22:59:31,500 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 22:59:31,501 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 22:59:31,501 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-09-24 22:59:31,501 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 22:59:31,502 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 22:59:31,502 INFO L82 PathProgramCache]: Analyzing trace with hash -1835563254, now seen corresponding path program 1 times [2020-09-24 22:59:31,502 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 22:59:31,503 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1503246402] [2020-09-24 22:59:31,503 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 22:59:31,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 22:59:31,618 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 22:59:31,733 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 22:59:31,861 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 22:59:31,980 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 22:59:32,092 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 22:59:32,190 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 22:59:33,052 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 22:59:33,322 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 22:59:36,069 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 22:59:36,598 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 22:59:36,599 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 457 [2020-09-24 22:59:36,599 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-09-24 22:59:36,599 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5039 [2020-09-24 22:59:36,599 FATAL L256 erpolLogProxyWrapper]: Heuristic: HIGHLEXORDER [2020-09-24 22:59:36,600 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-24 22:59:36,600 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 185 [2020-09-24 22:59:36,600 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 5 [2020-09-24 22:59:36,600 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 22:59:36,928 WARN L193 SmtUtils]: Spent 234.00 ms on a formula simplification that was a NOOP. DAG size: 175 [2020-09-24 22:59:36,929 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 22:59:36,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 22:59:36,944 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 22:59:36,978 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 22:59:36,978 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 67 [2020-09-24 22:59:36,978 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 22:59:36,979 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 41 [2020-09-24 22:59:36,979 FATAL L256 erpolLogProxyWrapper]: Heuristic: HIGHLEXORDER [2020-09-24 22:59:36,979 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 22:59:36,979 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 22:59:36,980 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 22:59:36,980 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 22:59:37,188 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 22:59:37,188 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1503246402] [2020-09-24 22:59:37,189 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-24 22:59:37,189 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-09-24 22:59:37,190 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1067112900] [2020-09-24 22:59:37,191 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-09-24 22:59:37,191 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 22:59:37,191 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-09-24 22:59:37,191 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-24 22:59:37,191 INFO L87 Difference]: Start difference. First operand 3784 states and 4723 transitions. Second operand 4 states. [2020-09-24 22:59:41,238 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 22:59:41,238 INFO L93 Difference]: Finished difference Result 10776 states and 13519 transitions. [2020-09-24 22:59:41,239 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-09-24 22:59:41,239 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 450 [2020-09-24 22:59:41,239 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 22:59:41,269 INFO L225 Difference]: With dead ends: 10776 [2020-09-24 22:59:41,270 INFO L226 Difference]: Without dead ends: 7331 [2020-09-24 22:59:41,277 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-24 22:59:41,284 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7331 states. [2020-09-24 22:59:41,389 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7331 to 3787. [2020-09-24 22:59:41,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3787 states. [2020-09-24 22:59:41,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3787 states to 3787 states and 4727 transitions. [2020-09-24 22:59:41,400 INFO L78 Accepts]: Start accepts. Automaton has 3787 states and 4727 transitions. Word has length 450 [2020-09-24 22:59:41,400 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 22:59:41,400 INFO L479 AbstractCegarLoop]: Abstraction has 3787 states and 4727 transitions. [2020-09-24 22:59:41,400 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-09-24 22:59:41,401 INFO L276 IsEmpty]: Start isEmpty. Operand 3787 states and 4727 transitions. [2020-09-24 22:59:41,407 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 452 [2020-09-24 22:59:41,407 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 22:59:41,408 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 22:59:41,408 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-09-24 22:59:41,408 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 22:59:41,408 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 22:59:41,409 INFO L82 PathProgramCache]: Analyzing trace with hash 1682956299, now seen corresponding path program 1 times [2020-09-24 22:59:41,409 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 22:59:41,409 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [62796682] [2020-09-24 22:59:41,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 22:59:41,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 22:59:41,573 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 22:59:41,713 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 22:59:41,841 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 22:59:41,955 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 22:59:42,052 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 22:59:42,420 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 22:59:43,147 FATAL L256 erpolLogProxyWrapper]: Now shrinking...