/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.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 SequenceOfStatements --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=WIDESTAMONGSMALL --traceabstraction.additional.smt.options tolerance=0.6 --traceabstraction.additional.smt.options log-additional-information=true --traceabstraction.additional.smt.options unknown-allowed=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf language data_model -i ../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_floodmax.4.ufo.BOUNDED-8.pals.c.v+lhb-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-28 18:21:22,828 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-28 18:21:22,831 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-28 18:21:22,879 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-28 18:21:22,880 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-28 18:21:22,886 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-28 18:21:22,888 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-28 18:21:22,894 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-28 18:21:22,897 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-28 18:21:22,905 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-28 18:21:22,906 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-28 18:21:22,908 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-28 18:21:22,908 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-28 18:21:22,912 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-28 18:21:22,916 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-28 18:21:22,918 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-28 18:21:22,919 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-28 18:21:22,924 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-28 18:21:22,944 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-28 18:21:22,952 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-28 18:21:22,955 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-28 18:21:22,957 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-28 18:21:22,958 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-28 18:21:22,961 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-28 18:21:22,970 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-28 18:21:22,970 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-28 18:21:22,970 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-28 18:21:22,973 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-28 18:21:22,973 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-28 18:21:22,974 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-28 18:21:22,975 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-28 18:21:22,976 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-28 18:21:22,978 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-28 18:21:22,979 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-28 18:21:22,980 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-28 18:21:22,980 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-28 18:21:22,981 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-28 18:21:22,981 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-28 18:21:22,981 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-28 18:21:22,982 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-28 18:21:22,983 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-28 18:21:22,990 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 [2020-10-28 18:21:23,041 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-28 18:21:23,041 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-28 18:21:23,046 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-28 18:21:23,046 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-28 18:21:23,046 INFO L138 SettingsManager]: * Use SBE=true [2020-10-28 18:21:23,047 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-28 18:21:23,047 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-28 18:21:23,047 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-28 18:21:23,047 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-28 18:21:23,047 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-28 18:21:23,048 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-28 18:21:23,049 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-28 18:21:23,049 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-28 18:21:23,049 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-28 18:21:23,049 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-28 18:21:23,049 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-28 18:21:23,050 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-28 18:21:23,050 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-28 18:21:23,050 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-28 18:21:23,050 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-28 18:21:23,050 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-28 18:21:23,051 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-28 18:21:23,051 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-28 18:21:23,051 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-28 18:21:23,051 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-28 18:21:23,051 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-28 18:21:23,052 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-28 18:21:23,052 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-28 18:21:23,052 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-28 18:21:23,052 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.6;log-additional-information=true;unknown-allowed=true; [2020-10-28 18:21:23,444 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-28 18:21:23,472 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-28 18:21:23,475 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-28 18:21:23,476 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-28 18:21:23,477 INFO L275 PluginConnector]: CDTParser initialized [2020-10-28 18:21:23,478 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_floodmax.4.ufo.BOUNDED-8.pals.c.v+lhb-reducer.c [2020-10-28 18:21:23,552 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/8f2116360/b852f90768e04135ae0c3fa5fe4e0c74/FLAGfdf1c5578 [2020-10-28 18:21:24,375 INFO L306 CDTParser]: Found 1 translation units. [2020-10-28 18:21:24,376 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/seq-mthreaded-reduced/pals_floodmax.4.ufo.BOUNDED-8.pals.c.v+lhb-reducer.c [2020-10-28 18:21:24,412 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/8f2116360/b852f90768e04135ae0c3fa5fe4e0c74/FLAGfdf1c5578 [2020-10-28 18:21:24,455 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/8f2116360/b852f90768e04135ae0c3fa5fe4e0c74 [2020-10-28 18:21:24,460 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-28 18:21:24,469 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-28 18:21:24,474 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-28 18:21:24,474 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-28 18:21:24,478 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-28 18:21:24,479 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 06:21:24" (1/1) ... [2020-10-28 18:21:24,487 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7a1892f1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 06:21:24, skipping insertion in model container [2020-10-28 18:21:24,487 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 06:21:24" (1/1) ... [2020-10-28 18:21:24,497 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-28 18:21:24,668 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-28 18:21:26,249 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-28 18:21:26,267 INFO L203 MainTranslator]: Completed pre-run [2020-10-28 18:21:27,037 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-28 18:21:27,076 INFO L208 MainTranslator]: Completed translation [2020-10-28 18:21:27,077 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 06:21:27 WrapperNode [2020-10-28 18:21:27,077 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-28 18:21:27,079 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-28 18:21:27,079 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-28 18:21:27,079 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-28 18:21:27,092 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 06:21:27" (1/1) ... [2020-10-28 18:21:27,093 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 06:21:27" (1/1) ... [2020-10-28 18:21:27,152 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 06:21:27" (1/1) ... [2020-10-28 18:21:27,157 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 06:21:27" (1/1) ... [2020-10-28 18:21:27,248 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 06:21:27" (1/1) ... [2020-10-28 18:21:27,295 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 06:21:27" (1/1) ... [2020-10-28 18:21:27,319 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 06:21:27" (1/1) ... [2020-10-28 18:21:27,348 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-28 18:21:27,349 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-28 18:21:27,350 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-28 18:21:27,350 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-28 18:21:27,351 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 06:21:27" (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 [2020-10-28 18:21:27,432 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-28 18:21:27,433 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-28 18:21:27,433 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-28 18:21:27,433 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-10-28 18:21:27,434 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-28 18:21:27,434 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-28 18:21:27,434 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-28 18:21:27,435 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-28 18:21:27,435 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-28 18:21:27,435 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-10-28 18:21:27,436 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-10-28 18:21:27,436 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2020-10-28 18:21:27,437 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-10-28 18:21:27,437 INFO L130 BoogieDeclarations]: Found specification of procedure read [2020-10-28 18:21:27,437 INFO L130 BoogieDeclarations]: Found specification of procedure write [2020-10-28 18:21:27,438 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2020-10-28 18:21:27,438 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2020-10-28 18:21:27,439 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2020-10-28 18:21:27,439 INFO L130 BoogieDeclarations]: Found specification of procedure node4 [2020-10-28 18:21:27,439 INFO L130 BoogieDeclarations]: Found specification of procedure init [2020-10-28 18:21:27,439 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-10-28 18:21:27,439 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-28 18:21:27,439 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-28 18:21:27,440 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-28 18:21:27,440 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-28 18:21:27,440 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-28 18:21:27,440 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-28 18:21:27,440 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-28 18:21:31,423 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-28 18:21:31,424 INFO L298 CfgBuilder]: Removed 0 assume(true) statements. [2020-10-28 18:21:31,428 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 06:21:31 BoogieIcfgContainer [2020-10-28 18:21:31,428 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-28 18:21:31,432 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-28 18:21:31,432 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-28 18:21:31,435 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-28 18:21:31,436 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.10 06:21:24" (1/3) ... [2020-10-28 18:21:31,437 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4f6a2a8c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 06:21:31, skipping insertion in model container [2020-10-28 18:21:31,437 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 06:21:27" (2/3) ... [2020-10-28 18:21:31,438 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4f6a2a8c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 06:21:31, skipping insertion in model container [2020-10-28 18:21:31,438 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 06:21:31" (3/3) ... [2020-10-28 18:21:31,440 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_floodmax.4.ufo.BOUNDED-8.pals.c.v+lhb-reducer.c [2020-10-28 18:21:31,454 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-28 18:21:31,464 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-28 18:21:31,479 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-28 18:21:31,528 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-28 18:21:31,529 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-28 18:21:31,529 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-28 18:21:31,529 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-28 18:21:31,529 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-28 18:21:31,529 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-28 18:21:31,529 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-28 18:21:31,530 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-28 18:21:31,578 INFO L276 IsEmpty]: Start isEmpty. Operand 914 states. [2020-10-28 18:21:31,621 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 304 [2020-10-28 18:21:31,621 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 18:21:31,625 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] [2020-10-28 18:21:31,625 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 18:21:31,634 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 18:21:31,635 INFO L82 PathProgramCache]: Analyzing trace with hash -917625237, now seen corresponding path program 1 times [2020-10-28 18:21:31,644 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 18:21:31,644 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2069331840] [2020-10-28 18:21:31,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 18:21:32,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:21:33,241 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:21:33,917 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:21:34,392 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:21:35,185 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:21:35,475 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:21:35,783 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:21:36,042 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:21:36,253 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:21:36,410 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:21:36,580 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:21:36,880 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:21:37,097 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:21:37,761 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:21:37,761 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 311 [2020-10-28 18:21:37,762 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 12 [2020-10-28 18:21:37,762 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5033 [2020-10-28 18:21:37,765 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:21:37,765 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:21:37,765 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-28 18:21:37,765 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 18:21:37,765 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 166 [2020-10-28 18:21:37,766 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-28 18:21:39,205 WARN L193 SmtUtils]: Spent 907.00 ms on a formula simplification that was a NOOP. DAG size: 346 [2020-10-28 18:21:39,212 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 18:21:39,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:21:39,244 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:21:39,276 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:21:39,276 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 18:21:39,276 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 18:21:39,276 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 38 [2020-10-28 18:21:39,277 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:21:39,277 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:21:39,277 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 18:21:39,278 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 18:21:39,278 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 18:21:39,278 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 18:21:39,627 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 18:21:39,628 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2069331840] [2020-10-28 18:21:39,631 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 18:21:39,631 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-28 18:21:39,632 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2117934195] [2020-10-28 18:21:39,641 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-28 18:21:39,641 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 18:21:39,660 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-28 18:21:39,661 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-28 18:21:39,663 INFO L87 Difference]: Start difference. First operand 914 states. Second operand 5 states. [2020-10-28 18:21:50,162 WARN L193 SmtUtils]: Spent 823.00 ms on a formula simplification that was a NOOP. DAG size: 352 [2020-10-28 18:21:52,624 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 18:21:52,625 INFO L93 Difference]: Finished difference Result 2665 states and 4856 transitions. [2020-10-28 18:21:52,625 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-28 18:21:52,626 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 303 [2020-10-28 18:21:52,628 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 18:21:52,666 INFO L225 Difference]: With dead ends: 2665 [2020-10-28 18:21:52,666 INFO L226 Difference]: Without dead ends: 1758 [2020-10-28 18:21:52,682 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-28 18:21:52,705 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1758 states. [2020-10-28 18:21:52,862 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1758 to 1677. [2020-10-28 18:21:52,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1677 states. [2020-10-28 18:21:52,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1677 states to 1677 states and 2580 transitions. [2020-10-28 18:21:52,875 INFO L78 Accepts]: Start accepts. Automaton has 1677 states and 2580 transitions. Word has length 303 [2020-10-28 18:21:52,876 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 18:21:52,876 INFO L481 AbstractCegarLoop]: Abstraction has 1677 states and 2580 transitions. [2020-10-28 18:21:52,876 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-28 18:21:52,877 INFO L276 IsEmpty]: Start isEmpty. Operand 1677 states and 2580 transitions. [2020-10-28 18:21:52,885 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 306 [2020-10-28 18:21:52,885 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 18:21:52,885 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] [2020-10-28 18:21:52,886 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-28 18:21:52,886 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 18:21:52,887 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 18:21:52,887 INFO L82 PathProgramCache]: Analyzing trace with hash 446512637, now seen corresponding path program 1 times [2020-10-28 18:21:52,887 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 18:21:52,888 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [336588137] [2020-10-28 18:21:52,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 18:21:52,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:21:53,023 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:21:53,202 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:21:53,426 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:21:53,811 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:21:54,047 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:21:54,240 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:21:54,410 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:21:54,566 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:21:54,711 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:21:54,818 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:21:55,023 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:21:55,175 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:21:55,347 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:21:57,929 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:21:58,012 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:21:58,013 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 313 [2020-10-28 18:21:58,013 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 14 [2020-10-28 18:21:58,013 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5042 [2020-10-28 18:21:58,014 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:21:58,014 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:21:58,014 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-28 18:21:58,014 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 18:21:58,015 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 169 [2020-10-28 18:21:58,015 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 18:21:59,149 WARN L193 SmtUtils]: Spent 885.00 ms on a formula simplification that was a NOOP. DAG size: 346 [2020-10-28 18:21:59,151 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 18:21:59,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:21:59,166 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:21:59,182 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:21:59,182 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 18:21:59,182 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 18:21:59,182 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 20 [2020-10-28 18:21:59,182 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:21:59,183 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:21:59,183 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 18:21:59,183 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 18:21:59,183 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 18:21:59,183 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:21:59,472 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 18:21:59,473 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [336588137] [2020-10-28 18:21:59,473 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 18:21:59,473 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-28 18:21:59,475 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [527571181] [2020-10-28 18:21:59,478 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-28 18:21:59,478 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 18:21:59,490 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-28 18:21:59,490 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-28 18:21:59,491 INFO L87 Difference]: Start difference. First operand 1677 states and 2580 transitions. Second operand 5 states. [2020-10-28 18:22:08,945 WARN L193 SmtUtils]: Spent 904.00 ms on a formula simplification that was a NOOP. DAG size: 352 [2020-10-28 18:22:11,222 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 18:22:11,222 INFO L93 Difference]: Finished difference Result 4950 states and 7611 transitions. [2020-10-28 18:22:11,228 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-28 18:22:11,229 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 305 [2020-10-28 18:22:11,230 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 18:22:11,250 INFO L225 Difference]: With dead ends: 4950 [2020-10-28 18:22:11,250 INFO L226 Difference]: Without dead ends: 3289 [2020-10-28 18:22:11,255 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-28 18:22:11,261 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3289 states. [2020-10-28 18:22:11,404 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3289 to 3211. [2020-10-28 18:22:11,404 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3211 states. [2020-10-28 18:22:11,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3211 states to 3211 states and 4912 transitions. [2020-10-28 18:22:11,419 INFO L78 Accepts]: Start accepts. Automaton has 3211 states and 4912 transitions. Word has length 305 [2020-10-28 18:22:11,420 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 18:22:11,420 INFO L481 AbstractCegarLoop]: Abstraction has 3211 states and 4912 transitions. [2020-10-28 18:22:11,420 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-28 18:22:11,420 INFO L276 IsEmpty]: Start isEmpty. Operand 3211 states and 4912 transitions. [2020-10-28 18:22:11,431 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 308 [2020-10-28 18:22:11,432 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 18:22:11,432 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] [2020-10-28 18:22:11,432 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-28 18:22:11,433 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 18:22:11,433 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 18:22:11,433 INFO L82 PathProgramCache]: Analyzing trace with hash 1414038888, now seen corresponding path program 1 times [2020-10-28 18:22:11,434 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 18:22:11,434 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1773935376] [2020-10-28 18:22:11,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 18:22:11,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:22:11,509 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:22:11,692 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:22:11,960 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:22:12,214 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:22:12,455 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:22:12,596 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:22:13,672 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:22:13,836 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:22:13,981 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:22:14,124 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:22:14,248 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:22:14,355 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:22:14,838 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:22:15,100 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:22:15,336 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:22:16,502 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:22:16,503 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 315 [2020-10-28 18:22:16,503 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 15 [2020-10-28 18:22:16,503 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5021 [2020-10-28 18:22:16,503 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:22:16,504 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:22:16,504 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-28 18:22:16,504 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 18:22:16,504 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 176 [2020-10-28 18:22:16,504 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:22:17,472 WARN L193 SmtUtils]: Spent 781.00 ms on a formula simplification that was a NOOP. DAG size: 346 [2020-10-28 18:22:17,474 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 18:22:17,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:22:17,489 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:22:17,515 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:22:17,515 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 18:22:17,515 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 18:22:17,516 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 30 [2020-10-28 18:22:17,516 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:22:17,516 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:22:17,516 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 18:22:17,516 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 18:22:17,516 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 18:22:17,517 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:22:17,783 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 18:22:17,784 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1773935376] [2020-10-28 18:22:17,784 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 18:22:17,785 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-28 18:22:17,786 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1417686120] [2020-10-28 18:22:17,787 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-28 18:22:17,791 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 18:22:17,792 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-28 18:22:17,793 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-28 18:22:17,793 INFO L87 Difference]: Start difference. First operand 3211 states and 4912 transitions. Second operand 5 states. [2020-10-28 18:22:26,473 WARN L193 SmtUtils]: Spent 950.00 ms on a formula simplification that was a NOOP. DAG size: 352 [2020-10-28 18:22:28,847 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 18:22:28,847 INFO L93 Difference]: Finished difference Result 9385 states and 14326 transitions. [2020-10-28 18:22:28,848 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-28 18:22:28,848 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 307 [2020-10-28 18:22:28,849 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 18:22:28,881 INFO L225 Difference]: With dead ends: 9385 [2020-10-28 18:22:28,881 INFO L226 Difference]: Without dead ends: 6260 [2020-10-28 18:22:28,890 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-28 18:22:28,896 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6260 states. [2020-10-28 18:22:29,161 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6260 to 6177. [2020-10-28 18:22:29,161 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6177 states. [2020-10-28 18:22:29,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6177 states to 6177 states and 9384 transitions. [2020-10-28 18:22:29,187 INFO L78 Accepts]: Start accepts. Automaton has 6177 states and 9384 transitions. Word has length 307 [2020-10-28 18:22:29,188 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 18:22:29,188 INFO L481 AbstractCegarLoop]: Abstraction has 6177 states and 9384 transitions. [2020-10-28 18:22:29,188 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-28 18:22:29,189 INFO L276 IsEmpty]: Start isEmpty. Operand 6177 states and 9384 transitions. [2020-10-28 18:22:29,204 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 310 [2020-10-28 18:22:29,205 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 18:22:29,205 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] [2020-10-28 18:22:29,205 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-28 18:22:29,206 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 18:22:29,206 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 18:22:29,206 INFO L82 PathProgramCache]: Analyzing trace with hash -818039005, now seen corresponding path program 1 times [2020-10-28 18:22:29,206 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 18:22:29,207 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1812326954] [2020-10-28 18:22:29,207 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 18:22:29,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:22:29,286 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:22:29,337 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:22:29,540 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:22:29,681 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:22:29,859 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:22:30,024 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:22:30,161 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:22:30,284 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:22:30,402 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:22:30,511 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:22:30,792 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:22:31,419 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:22:31,663 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:22:31,916 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:22:34,271 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:22:34,271 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 317 [2020-10-28 18:22:34,272 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 14 [2020-10-28 18:22:34,272 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5007 [2020-10-28 18:22:34,272 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:22:34,272 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:22:34,272 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-28 18:22:34,272 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 18:22:34,273 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 174 [2020-10-28 18:22:34,273 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:22:35,304 WARN L193 SmtUtils]: Spent 852.00 ms on a formula simplification that was a NOOP. DAG size: 346 [2020-10-28 18:22:35,306 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 18:22:35,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:22:35,320 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:22:35,335 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:22:35,335 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 18:22:35,335 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 18:22:35,335 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 18 [2020-10-28 18:22:35,336 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:22:35,336 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:22:35,336 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 18:22:35,336 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 18:22:35,336 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 18:22:35,336 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:22:35,662 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 18:22:35,663 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1812326954] [2020-10-28 18:22:35,663 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 18:22:35,663 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-28 18:22:35,664 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1951000593] [2020-10-28 18:22:35,665 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-28 18:22:35,665 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 18:22:35,666 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-28 18:22:35,667 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-28 18:22:35,667 INFO L87 Difference]: Start difference. First operand 6177 states and 9384 transitions. Second operand 5 states. [2020-10-28 18:22:44,229 WARN L193 SmtUtils]: Spent 885.00 ms on a formula simplification that was a NOOP. DAG size: 352 [2020-10-28 18:22:46,455 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 18:22:46,455 INFO L93 Difference]: Finished difference Result 18272 states and 27725 transitions. [2020-10-28 18:22:46,456 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-28 18:22:46,456 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 309 [2020-10-28 18:22:46,457 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 18:22:46,509 INFO L225 Difference]: With dead ends: 18272 [2020-10-28 18:22:46,509 INFO L226 Difference]: Without dead ends: 12126 [2020-10-28 18:22:46,524 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-28 18:22:46,538 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12126 states. [2020-10-28 18:22:47,159 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12126 to 12066. [2020-10-28 18:22:47,159 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12066 states. [2020-10-28 18:22:47,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12066 states to 12066 states and 18185 transitions. [2020-10-28 18:22:47,193 INFO L78 Accepts]: Start accepts. Automaton has 12066 states and 18185 transitions. Word has length 309 [2020-10-28 18:22:47,193 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 18:22:47,193 INFO L481 AbstractCegarLoop]: Abstraction has 12066 states and 18185 transitions. [2020-10-28 18:22:47,193 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-28 18:22:47,193 INFO L276 IsEmpty]: Start isEmpty. Operand 12066 states and 18185 transitions. [2020-10-28 18:22:47,221 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 312 [2020-10-28 18:22:47,221 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 18:22:47,222 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] [2020-10-28 18:22:47,222 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-28 18:22:47,222 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 18:22:47,222 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 18:22:47,223 INFO L82 PathProgramCache]: Analyzing trace with hash -383111082, now seen corresponding path program 1 times [2020-10-28 18:22:47,223 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 18:22:47,223 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [613034201] [2020-10-28 18:22:47,223 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 18:22:47,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:22:47,312 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:22:47,470 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:22:47,706 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:22:47,898 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:22:48,034 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:22:48,150 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:22:50,465 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:22:50,581 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:22:50,672 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:22:50,754 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:22:50,828 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:22:50,896 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:22:51,009 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:22:51,165 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:22:51,281 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:22:52,283 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:22:52,283 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 319 [2020-10-28 18:22:52,284 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 15 [2020-10-28 18:22:52,284 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5008 [2020-10-28 18:22:52,284 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:22:52,284 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:22:52,284 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-28 18:22:52,284 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 18:22:52,284 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 156 [2020-10-28 18:22:52,285 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:22:53,245 WARN L193 SmtUtils]: Spent 842.00 ms on a formula simplification that was a NOOP. DAG size: 346 [2020-10-28 18:22:53,247 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 18:22:53,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:22:53,260 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:22:53,272 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:22:53,272 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 18:22:53,272 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 18:22:53,272 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 14 [2020-10-28 18:22:53,272 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:22:53,272 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:22:53,273 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 18:22:53,273 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 18:22:53,273 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 18:22:53,273 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:22:53,434 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 18:22:53,434 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [613034201] [2020-10-28 18:22:53,434 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 18:22:53,434 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-28 18:22:53,434 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [345447613] [2020-10-28 18:22:53,435 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-28 18:22:53,435 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 18:22:53,436 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-28 18:22:53,436 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-28 18:22:53,436 INFO L87 Difference]: Start difference. First operand 12066 states and 18185 transitions. Second operand 5 states. [2020-10-28 18:23:02,876 WARN L193 SmtUtils]: Spent 910.00 ms on a formula simplification that was a NOOP. DAG size: 352 [2020-10-28 18:23:05,456 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 18:23:05,457 INFO L93 Difference]: Finished difference Result 35470 states and 53353 transitions. [2020-10-28 18:23:05,457 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-28 18:23:05,458 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 311 [2020-10-28 18:23:05,458 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 18:23:05,527 INFO L225 Difference]: With dead ends: 35470 [2020-10-28 18:23:05,528 INFO L226 Difference]: Without dead ends: 23584 [2020-10-28 18:23:05,558 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-28 18:23:05,589 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23584 states. [2020-10-28 18:23:06,556 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23584 to 23532. [2020-10-28 18:23:06,556 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23532 states. [2020-10-28 18:23:06,612 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23532 states to 23532 states and 35141 transitions. [2020-10-28 18:23:06,612 INFO L78 Accepts]: Start accepts. Automaton has 23532 states and 35141 transitions. Word has length 311 [2020-10-28 18:23:06,613 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 18:23:06,613 INFO L481 AbstractCegarLoop]: Abstraction has 23532 states and 35141 transitions. [2020-10-28 18:23:06,613 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-28 18:23:06,613 INFO L276 IsEmpty]: Start isEmpty. Operand 23532 states and 35141 transitions. [2020-10-28 18:23:06,663 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 314 [2020-10-28 18:23:06,663 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 18:23:06,664 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] [2020-10-28 18:23:06,664 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-28 18:23:06,664 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 18:23:06,665 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 18:23:06,665 INFO L82 PathProgramCache]: Analyzing trace with hash -618474126, now seen corresponding path program 1 times [2020-10-28 18:23:06,665 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 18:23:06,665 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1754813471] [2020-10-28 18:23:06,666 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 18:23:06,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:23:06,742 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:23:06,800 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:23:06,889 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:23:06,956 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:23:07,011 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:23:07,077 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:23:07,160 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:23:07,360 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:23:07,434 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:23:09,247 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:23:09,343 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:23:09,431 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:23:09,607 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:23:09,780 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:23:09,932 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:23:11,192 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:23:11,760 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:23:11,760 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 321 [2020-10-28 18:23:11,760 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 16 [2020-10-28 18:23:11,760 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5044 [2020-10-28 18:23:11,760 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:23:11,760 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:23:11,761 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 18:23:11,761 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 26 [2020-10-28 18:23:11,761 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 173 [2020-10-28 18:23:11,761 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:23:12,732 WARN L193 SmtUtils]: Spent 867.00 ms on a formula simplification that was a NOOP. DAG size: 346 [2020-10-28 18:23:12,734 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 18:23:12,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:23:12,751 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:23:12,766 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:23:12,766 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 18:23:12,766 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 18:23:12,766 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 18 [2020-10-28 18:23:12,766 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:23:12,767 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:23:12,767 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 18:23:12,767 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 18:23:12,767 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 18:23:12,767 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:23:12,944 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 18:23:12,944 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1754813471] [2020-10-28 18:23:12,944 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 18:23:12,945 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 18:23:12,945 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1151469408] [2020-10-28 18:23:12,945 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 18:23:12,946 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 18:23:12,946 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 18:23:12,946 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 18:23:12,946 INFO L87 Difference]: Start difference. First operand 23532 states and 35141 transitions. Second operand 4 states. [2020-10-28 18:23:23,684 WARN L193 SmtUtils]: Spent 911.00 ms on a formula simplification that was a NOOP. DAG size: 351 [2020-10-28 18:23:26,239 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 18:23:26,240 INFO L93 Difference]: Finished difference Result 68641 states and 102221 transitions. [2020-10-28 18:23:26,242 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 18:23:26,243 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 313 [2020-10-28 18:23:26,243 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 18:23:26,346 INFO L225 Difference]: With dead ends: 68641 [2020-10-28 18:23:26,346 INFO L226 Difference]: Without dead ends: 46237 [2020-10-28 18:23:26,402 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-28 18:23:26,454 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46237 states. [2020-10-28 18:23:28,099 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46237 to 46089. [2020-10-28 18:23:28,099 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46089 states. [2020-10-28 18:23:28,173 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46089 states to 46089 states and 68407 transitions. [2020-10-28 18:23:28,173 INFO L78 Accepts]: Start accepts. Automaton has 46089 states and 68407 transitions. Word has length 313 [2020-10-28 18:23:28,173 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 18:23:28,173 INFO L481 AbstractCegarLoop]: Abstraction has 46089 states and 68407 transitions. [2020-10-28 18:23:28,173 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 18:23:28,173 INFO L276 IsEmpty]: Start isEmpty. Operand 46089 states and 68407 transitions. [2020-10-28 18:23:28,251 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 314 [2020-10-28 18:23:28,251 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 18:23:28,251 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] [2020-10-28 18:23:28,252 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-28 18:23:28,252 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 18:23:28,252 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 18:23:28,253 INFO L82 PathProgramCache]: Analyzing trace with hash -987716019, now seen corresponding path program 1 times [2020-10-28 18:23:28,253 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 18:23:28,254 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1541991750] [2020-10-28 18:23:28,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 18:23:28,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:23:28,317 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:23:28,434 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:23:28,811 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:23:28,935 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:23:29,027 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:23:29,093 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:23:29,166 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:23:33,304 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:23:33,305 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 321 [2020-10-28 18:23:33,305 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-28 18:23:33,305 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5010 [2020-10-28 18:23:33,305 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:23:33,305 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:23:33,305 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-28 18:23:33,305 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 18:23:33,305 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 118 [2020-10-28 18:23:33,305 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:23:34,377 WARN L193 SmtUtils]: Spent 866.00 ms on a formula simplification that was a NOOP. DAG size: 346 [2020-10-28 18:23:34,379 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 18:23:34,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:23:34,391 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:23:34,405 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:23:34,405 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 18:23:34,405 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 18:23:34,405 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 16 [2020-10-28 18:23:34,405 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:23:34,406 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:23:34,406 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 18:23:34,406 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 18:23:34,406 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 18:23:34,406 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:23:34,567 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 18:23:34,567 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1541991750] [2020-10-28 18:23:34,567 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 18:23:34,568 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-28 18:23:34,568 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1600896518] [2020-10-28 18:23:34,569 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-28 18:23:34,569 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 18:23:34,569 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-28 18:23:34,569 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-28 18:23:34,570 INFO L87 Difference]: Start difference. First operand 46089 states and 68407 transitions. Second operand 5 states. [2020-10-28 18:23:46,029 WARN L193 SmtUtils]: Spent 914.00 ms on a formula simplification that was a NOOP. DAG size: 352 [2020-10-28 18:23:49,160 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 18:23:49,161 INFO L93 Difference]: Finished difference Result 94673 states and 139901 transitions. [2020-10-28 18:23:49,161 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-28 18:23:49,162 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 313 [2020-10-28 18:23:49,165 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 18:23:49,291 INFO L225 Difference]: With dead ends: 94673 [2020-10-28 18:23:49,291 INFO L226 Difference]: Without dead ends: 51805 [2020-10-28 18:23:49,364 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-28 18:23:49,411 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51805 states. [2020-10-28 18:23:51,696 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51805 to 46025. [2020-10-28 18:23:51,696 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46025 states. [2020-10-28 18:23:51,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46025 states to 46025 states and 68311 transitions. [2020-10-28 18:23:51,757 INFO L78 Accepts]: Start accepts. Automaton has 46025 states and 68311 transitions. Word has length 313 [2020-10-28 18:23:51,758 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 18:23:51,758 INFO L481 AbstractCegarLoop]: Abstraction has 46025 states and 68311 transitions. [2020-10-28 18:23:51,758 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-28 18:23:51,758 INFO L276 IsEmpty]: Start isEmpty. Operand 46025 states and 68311 transitions. [2020-10-28 18:23:51,798 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 316 [2020-10-28 18:23:51,798 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 18:23:51,799 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] [2020-10-28 18:23:51,799 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-28 18:23:51,799 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 18:23:51,799 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 18:23:51,800 INFO L82 PathProgramCache]: Analyzing trace with hash -2109431412, now seen corresponding path program 1 times [2020-10-28 18:23:51,800 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 18:23:51,800 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [62589880] [2020-10-28 18:23:51,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 18:23:51,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:23:51,860 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:23:51,903 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:23:51,981 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:23:52,299 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:23:52,466 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:23:52,715 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:23:52,795 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:23:52,880 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:23:52,942 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:23:52,996 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:23:53,040 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:23:53,099 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:23:53,141 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:23:53,186 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:23:56,852 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:23:56,852 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 323 [2020-10-28 18:23:56,852 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 14 [2020-10-28 18:23:56,853 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5012 [2020-10-28 18:23:56,853 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:23:56,853 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:23:56,853 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-28 18:23:56,853 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 18:23:56,853 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 161 [2020-10-28 18:23:56,854 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:23:57,863 WARN L193 SmtUtils]: Spent 834.00 ms on a formula simplification that was a NOOP. DAG size: 346 [2020-10-28 18:23:57,864 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 18:23:57,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:23:57,875 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:23:57,883 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:23:57,884 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 18:23:57,884 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 18:23:57,884 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-28 18:23:57,884 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:23:57,884 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:23:57,884 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 18:23:57,884 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 18:23:57,884 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 18:23:57,884 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:23:58,043 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 18:23:58,043 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [62589880] [2020-10-28 18:23:58,044 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 18:23:58,044 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-28 18:23:58,044 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1466781526] [2020-10-28 18:23:58,045 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-28 18:23:58,045 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 18:23:58,046 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-28 18:23:58,046 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-28 18:23:58,046 INFO L87 Difference]: Start difference. First operand 46025 states and 68311 transitions. Second operand 5 states. [2020-10-28 18:24:11,656 WARN L193 SmtUtils]: Spent 932.00 ms on a formula simplification that was a NOOP. DAG size: 352 [2020-10-28 18:24:15,530 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 18:24:15,530 INFO L93 Difference]: Finished difference Result 132837 states and 196051 transitions. [2020-10-28 18:24:15,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-28 18:24:15,531 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 315 [2020-10-28 18:24:15,532 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 18:24:15,679 INFO L225 Difference]: With dead ends: 132837 [2020-10-28 18:24:15,679 INFO L226 Difference]: Without dead ends: 89881 [2020-10-28 18:24:15,730 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-28 18:24:15,809 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89881 states. [2020-10-28 18:24:21,024 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89881 to 89837. [2020-10-28 18:24:21,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89837 states. [2020-10-28 18:24:21,345 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89837 states to 89837 states and 132135 transitions. [2020-10-28 18:24:21,345 INFO L78 Accepts]: Start accepts. Automaton has 89837 states and 132135 transitions. Word has length 315 [2020-10-28 18:24:21,346 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 18:24:21,346 INFO L481 AbstractCegarLoop]: Abstraction has 89837 states and 132135 transitions. [2020-10-28 18:24:21,346 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-28 18:24:21,346 INFO L276 IsEmpty]: Start isEmpty. Operand 89837 states and 132135 transitions. [2020-10-28 18:24:21,440 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 318 [2020-10-28 18:24:21,440 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 18:24:21,440 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] [2020-10-28 18:24:21,441 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-28 18:24:21,441 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 18:24:21,441 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 18:24:21,441 INFO L82 PathProgramCache]: Analyzing trace with hash 1082215761, now seen corresponding path program 1 times [2020-10-28 18:24:21,444 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 18:24:21,445 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [737059765] [2020-10-28 18:24:21,446 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 18:24:21,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:24:21,511 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:24:21,555 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:24:21,896 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:24:22,011 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:24:22,154 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:24:22,300 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:24:22,483 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:24:22,540 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:24:22,588 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:24:22,632 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:24:22,682 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:24:22,719 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:24:22,751 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:24:26,506 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:24:26,506 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 325 [2020-10-28 18:24:26,506 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 13 [2020-10-28 18:24:26,506 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5015 [2020-10-28 18:24:26,506 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:24:26,506 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:24:26,506 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-28 18:24:26,507 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 18:24:26,507 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 153 [2020-10-28 18:24:26,507 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:24:27,479 WARN L193 SmtUtils]: Spent 814.00 ms on a formula simplification that was a NOOP. DAG size: 346 [2020-10-28 18:24:27,483 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 18:24:27,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:24:27,495 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:24:27,503 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:24:27,504 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 18:24:27,504 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 18:24:27,504 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-10-28 18:24:27,504 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:24:27,504 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:24:27,504 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 18:24:27,504 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 18:24:27,505 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 18:24:27,505 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:24:27,657 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 18:24:27,657 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [737059765] [2020-10-28 18:24:27,657 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 18:24:27,657 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-28 18:24:27,658 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [78209403] [2020-10-28 18:24:27,658 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-28 18:24:27,658 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 18:24:27,660 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-28 18:24:27,660 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-28 18:24:27,660 INFO L87 Difference]: Start difference. First operand 89837 states and 132135 transitions. Second operand 5 states. [2020-10-28 18:24:45,921 WARN L193 SmtUtils]: Spent 1.04 s on a formula simplification that was a NOOP. DAG size: 352 [2020-10-28 18:24:51,389 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 18:24:51,389 INFO L93 Difference]: Finished difference Result 260323 states and 380939 transitions. [2020-10-28 18:24:51,390 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-28 18:24:51,390 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 317 [2020-10-28 18:24:51,391 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 18:24:51,898 INFO L225 Difference]: With dead ends: 260323 [2020-10-28 18:24:51,898 INFO L226 Difference]: Without dead ends: 175233 [2020-10-28 18:24:52,038 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-28 18:24:52,189 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175233 states.