/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=DEEPEST --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_opt-floodmax.4.ufo.BOUNDED-8.pals.c.v+lhb-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-28 00:37:12,899 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-28 00:37:12,902 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-28 00:37:12,939 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-28 00:37:12,940 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-28 00:37:12,941 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-28 00:37:12,943 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-28 00:37:12,946 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-28 00:37:12,948 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-28 00:37:12,950 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-28 00:37:12,951 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-28 00:37:12,953 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-28 00:37:12,953 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-28 00:37:12,955 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-28 00:37:12,956 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-28 00:37:12,958 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-28 00:37:12,959 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-28 00:37:12,960 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-28 00:37:12,965 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-28 00:37:12,970 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-28 00:37:12,974 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-28 00:37:12,975 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-28 00:37:12,977 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-28 00:37:12,978 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-28 00:37:12,982 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-28 00:37:12,982 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-28 00:37:12,983 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-28 00:37:12,984 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-28 00:37:12,985 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-28 00:37:12,986 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-28 00:37:12,986 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-28 00:37:12,987 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-28 00:37:12,990 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-28 00:37:12,991 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-28 00:37:12,992 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-28 00:37:12,993 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-28 00:37:12,993 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-28 00:37:12,994 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-28 00:37:12,994 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-28 00:37:13,003 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-28 00:37:13,004 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-28 00:37:13,005 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 00:37:13,033 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-28 00:37:13,033 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-28 00:37:13,035 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-28 00:37:13,035 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-28 00:37:13,036 INFO L138 SettingsManager]: * Use SBE=true [2020-10-28 00:37:13,036 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-28 00:37:13,036 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-28 00:37:13,036 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-28 00:37:13,037 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-28 00:37:13,037 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-28 00:37:13,037 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-28 00:37:13,038 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-28 00:37:13,038 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-28 00:37:13,038 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-28 00:37:13,038 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-28 00:37:13,039 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-28 00:37:13,039 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-28 00:37:13,039 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-28 00:37:13,039 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-28 00:37:13,040 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-28 00:37:13,040 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-28 00:37:13,040 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-28 00:37:13,041 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-28 00:37:13,041 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-28 00:37:13,041 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-28 00:37:13,041 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-28 00:37:13,042 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-28 00:37:13,042 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-28 00:37:13,042 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-28 00:37:13,042 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=DEEPEST;log-additional-information=true;unknown-allowed=true; [2020-10-28 00:37:13,448 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-28 00:37:13,496 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-28 00:37:13,499 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-28 00:37:13,500 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-28 00:37:13,501 INFO L275 PluginConnector]: CDTParser initialized [2020-10-28 00:37:13,502 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.4.ufo.BOUNDED-8.pals.c.v+lhb-reducer.c [2020-10-28 00:37:13,600 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/a3a437fb9/dd49f939767049949ba2dbd2a4d43efc/FLAGfd734c75e [2020-10-28 00:37:14,438 INFO L306 CDTParser]: Found 1 translation units. [2020-10-28 00:37:14,439 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.4.ufo.BOUNDED-8.pals.c.v+lhb-reducer.c [2020-10-28 00:37:14,464 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/a3a437fb9/dd49f939767049949ba2dbd2a4d43efc/FLAGfd734c75e [2020-10-28 00:37:14,554 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/a3a437fb9/dd49f939767049949ba2dbd2a4d43efc [2020-10-28 00:37:14,557 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-28 00:37:14,564 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-28 00:37:14,566 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-28 00:37:14,566 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-28 00:37:14,570 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-28 00:37:14,571 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 12:37:14" (1/1) ... [2020-10-28 00:37:14,578 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@da1d94c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 12:37:14, skipping insertion in model container [2020-10-28 00:37:14,579 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 12:37:14" (1/1) ... [2020-10-28 00:37:14,587 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-28 00:37:14,731 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-28 00:37:16,418 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-28 00:37:16,434 INFO L203 MainTranslator]: Completed pre-run [2020-10-28 00:37:17,346 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-28 00:37:17,374 INFO L208 MainTranslator]: Completed translation [2020-10-28 00:37:17,375 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 12:37:17 WrapperNode [2020-10-28 00:37:17,375 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-28 00:37:17,376 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-28 00:37:17,376 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-28 00:37:17,376 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-28 00:37:17,390 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 12:37:17" (1/1) ... [2020-10-28 00:37:17,391 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 12:37:17" (1/1) ... [2020-10-28 00:37:17,428 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 12:37:17" (1/1) ... [2020-10-28 00:37:17,428 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 12:37:17" (1/1) ... [2020-10-28 00:37:17,543 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 12:37:17" (1/1) ... [2020-10-28 00:37:17,615 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 12:37:17" (1/1) ... [2020-10-28 00:37:17,626 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 12:37:17" (1/1) ... [2020-10-28 00:37:17,643 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-28 00:37:17,644 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-28 00:37:17,644 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-28 00:37:17,644 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-28 00:37:17,645 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 12:37:17" (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 00:37:17,737 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-28 00:37:17,737 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-28 00:37:17,738 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-28 00:37:17,738 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-10-28 00:37:17,738 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-28 00:37:17,739 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-28 00:37:17,739 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-28 00:37:17,739 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-28 00:37:17,740 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-28 00:37:17,740 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-10-28 00:37:17,741 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-10-28 00:37:17,741 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2020-10-28 00:37:17,741 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-10-28 00:37:17,741 INFO L130 BoogieDeclarations]: Found specification of procedure read [2020-10-28 00:37:17,742 INFO L130 BoogieDeclarations]: Found specification of procedure write [2020-10-28 00:37:17,742 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2020-10-28 00:37:17,743 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2020-10-28 00:37:17,743 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2020-10-28 00:37:17,743 INFO L130 BoogieDeclarations]: Found specification of procedure node4 [2020-10-28 00:37:17,743 INFO L130 BoogieDeclarations]: Found specification of procedure init [2020-10-28 00:37:17,743 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-10-28 00:37:17,744 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-28 00:37:17,744 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-28 00:37:17,744 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-28 00:37:17,744 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-28 00:37:17,744 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-28 00:37:17,744 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-28 00:37:17,745 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-28 00:37:21,654 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-28 00:37:21,654 INFO L298 CfgBuilder]: Removed 0 assume(true) statements. [2020-10-28 00:37:21,659 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 12:37:21 BoogieIcfgContainer [2020-10-28 00:37:21,660 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-28 00:37:21,662 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-28 00:37:21,662 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-28 00:37:21,665 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-28 00:37:21,666 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.10 12:37:14" (1/3) ... [2020-10-28 00:37:21,667 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6d30cf2b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 12:37:21, skipping insertion in model container [2020-10-28 00:37:21,667 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 12:37:17" (2/3) ... [2020-10-28 00:37:21,667 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6d30cf2b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 12:37:21, skipping insertion in model container [2020-10-28 00:37:21,667 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 12:37:21" (3/3) ... [2020-10-28 00:37:21,669 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_opt-floodmax.4.ufo.BOUNDED-8.pals.c.v+lhb-reducer.c [2020-10-28 00:37:21,681 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-28 00:37:21,688 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-28 00:37:21,701 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-28 00:37:21,738 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-28 00:37:21,738 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-28 00:37:21,738 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-28 00:37:21,739 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-28 00:37:21,739 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-28 00:37:21,739 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-28 00:37:21,739 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-28 00:37:21,739 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-28 00:37:21,775 INFO L276 IsEmpty]: Start isEmpty. Operand 996 states. [2020-10-28 00:37:21,808 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 320 [2020-10-28 00:37:21,808 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 00:37:21,810 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 00:37:21,810 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 00:37:21,818 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 00:37:21,819 INFO L82 PathProgramCache]: Analyzing trace with hash -522103350, now seen corresponding path program 1 times [2020-10-28 00:37:21,830 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 00:37:21,830 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [669198734] [2020-10-28 00:37:21,831 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 00:37:22,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:37:22,642 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:37:23,292 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:37:23,894 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:37:24,402 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:37:24,836 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:37:25,135 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:37:25,392 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:37:25,637 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:37:25,845 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:37:26,083 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:37:26,504 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:37:26,853 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:37:27,143 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:37:27,409 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:37:27,504 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:37:27,505 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 327 [2020-10-28 00:37:27,505 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 14 [2020-10-28 00:37:27,505 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5025 [2020-10-28 00:37:27,509 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:37:27,509 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 00:37:27,509 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 86 [2020-10-28 00:37:27,510 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 214 [2020-10-28 00:37:27,510 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-10-28 00:37:28,879 WARN L193 SmtUtils]: Spent 972.00 ms on a formula simplification that was a NOOP. DAG size: 358 [2020-10-28 00:37:28,886 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 00:37:28,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:37:28,920 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:37:28,948 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:37:28,948 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 00:37:28,949 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 00:37:28,949 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 37 [2020-10-28 00:37:28,949 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:37:28,949 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 00:37:28,950 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 00:37:28,950 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 00:37:28,950 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 00:37:29,255 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 00:37:29,256 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [669198734] [2020-10-28 00:37:29,259 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 00:37:29,259 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 00:37:29,260 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [675186327] [2020-10-28 00:37:29,272 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 00:37:29,272 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 00:37:29,291 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 00:37:29,292 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 00:37:29,294 INFO L87 Difference]: Start difference. First operand 996 states. Second operand 4 states. [2020-10-28 00:37:30,443 WARN L193 SmtUtils]: Spent 932.00 ms on a formula simplification that was a NOOP. DAG size: 359 [2020-10-28 00:37:39,334 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 00:37:39,334 INFO L93 Difference]: Finished difference Result 1728 states and 3078 transitions. [2020-10-28 00:37:39,337 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 00:37:39,338 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 319 [2020-10-28 00:37:39,341 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 00:37:39,397 INFO L225 Difference]: With dead ends: 1728 [2020-10-28 00:37:39,397 INFO L226 Difference]: Without dead ends: 1425 [2020-10-28 00:37:39,413 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-28 00:37:39,440 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1425 states. [2020-10-28 00:37:39,601 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1425 to 1422. [2020-10-28 00:37:39,603 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1422 states. [2020-10-28 00:37:39,612 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1422 states to 1422 states and 2205 transitions. [2020-10-28 00:37:39,615 INFO L78 Accepts]: Start accepts. Automaton has 1422 states and 2205 transitions. Word has length 319 [2020-10-28 00:37:39,621 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 00:37:39,621 INFO L481 AbstractCegarLoop]: Abstraction has 1422 states and 2205 transitions. [2020-10-28 00:37:39,621 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 00:37:39,621 INFO L276 IsEmpty]: Start isEmpty. Operand 1422 states and 2205 transitions. [2020-10-28 00:37:39,636 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 320 [2020-10-28 00:37:39,637 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 00:37:39,638 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 00:37:39,639 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-28 00:37:39,639 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 00:37:39,643 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 00:37:39,643 INFO L82 PathProgramCache]: Analyzing trace with hash -1893745954, now seen corresponding path program 1 times [2020-10-28 00:37:39,644 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 00:37:39,644 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1843569146] [2020-10-28 00:37:39,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 00:37:39,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:37:39,871 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:37:40,159 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:37:40,527 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:37:40,848 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:37:41,125 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:37:41,359 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:37:41,544 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:37:41,719 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:37:41,861 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:37:42,089 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:37:42,350 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:37:42,593 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:37:42,863 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:37:43,028 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:37:44,814 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:37:44,814 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 327 [2020-10-28 00:37:44,815 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 14 [2020-10-28 00:37:44,815 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5041 [2020-10-28 00:37:44,815 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:37:44,815 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 00:37:44,815 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 89 [2020-10-28 00:37:44,815 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 232 [2020-10-28 00:37:44,816 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:37:46,060 WARN L193 SmtUtils]: Spent 1.05 s on a formula simplification that was a NOOP. DAG size: 358 [2020-10-28 00:37:46,062 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 00:37:46,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:37:46,082 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:37:46,154 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:37:46,154 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 00:37:46,154 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 00:37:46,154 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 78 [2020-10-28 00:37:46,155 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:37:46,155 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 00:37:46,155 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 00:37:46,155 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 00:37:46,155 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:37:46,341 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 00:37:46,341 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1843569146] [2020-10-28 00:37:46,342 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 00:37:46,342 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 00:37:46,343 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1272336339] [2020-10-28 00:37:46,348 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 00:37:46,348 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 00:37:46,350 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 00:37:46,351 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 00:37:46,351 INFO L87 Difference]: Start difference. First operand 1422 states and 2205 transitions. Second operand 4 states. [2020-10-28 00:37:47,485 WARN L193 SmtUtils]: Spent 1.05 s on a formula simplification that was a NOOP. DAG size: 359 [2020-10-28 00:37:54,877 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 00:37:54,877 INFO L93 Difference]: Finished difference Result 2751 states and 4309 transitions. [2020-10-28 00:37:54,878 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 00:37:54,879 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 319 [2020-10-28 00:37:54,882 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 00:37:54,897 INFO L225 Difference]: With dead ends: 2751 [2020-10-28 00:37:54,897 INFO L226 Difference]: Without dead ends: 2399 [2020-10-28 00:37:54,904 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-28 00:37:54,908 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2399 states. [2020-10-28 00:37:54,998 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2399 to 2396. [2020-10-28 00:37:54,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2396 states. [2020-10-28 00:37:55,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2396 states to 2396 states and 3731 transitions. [2020-10-28 00:37:55,019 INFO L78 Accepts]: Start accepts. Automaton has 2396 states and 3731 transitions. Word has length 319 [2020-10-28 00:37:55,020 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 00:37:55,020 INFO L481 AbstractCegarLoop]: Abstraction has 2396 states and 3731 transitions. [2020-10-28 00:37:55,020 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 00:37:55,021 INFO L276 IsEmpty]: Start isEmpty. Operand 2396 states and 3731 transitions. [2020-10-28 00:37:55,030 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 320 [2020-10-28 00:37:55,030 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 00:37:55,031 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 00:37:55,031 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-28 00:37:55,031 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 00:37:55,032 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 00:37:55,032 INFO L82 PathProgramCache]: Analyzing trace with hash -1904243019, now seen corresponding path program 1 times [2020-10-28 00:37:55,032 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 00:37:55,033 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2016150238] [2020-10-28 00:37:55,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 00:37:55,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:37:55,479 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:37:55,785 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:37:56,036 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:37:56,358 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:37:56,588 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:37:56,776 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:37:56,937 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:37:57,074 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:37:57,196 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:37:57,355 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:37:57,689 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:37:57,975 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:37:58,175 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:37:58,330 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:38:00,331 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:38:00,332 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 327 [2020-10-28 00:38:00,332 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 14 [2020-10-28 00:38:00,332 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5014 [2020-10-28 00:38:00,332 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:38:00,333 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-28 00:38:00,333 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 00:38:00,333 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 114 [2020-10-28 00:38:00,333 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:38:01,492 WARN L193 SmtUtils]: Spent 883.00 ms on a formula simplification that was a NOOP. DAG size: 358 [2020-10-28 00:38:01,497 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 00:38:01,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:38:01,512 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:38:01,545 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:38:01,545 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 00:38:01,545 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 00:38:01,545 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 37 [2020-10-28 00:38:01,546 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:38:01,546 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 00:38:01,546 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 00:38:01,546 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 00:38:01,546 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:38:01,821 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 00:38:01,822 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2016150238] [2020-10-28 00:38:01,822 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 00:38:01,823 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-28 00:38:01,823 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1932401806] [2020-10-28 00:38:01,824 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-28 00:38:01,824 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 00:38:01,825 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-28 00:38:01,825 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-28 00:38:01,825 INFO L87 Difference]: Start difference. First operand 2396 states and 3731 transitions. Second operand 5 states. [2020-10-28 00:38:11,050 WARN L193 SmtUtils]: Spent 944.00 ms on a formula simplification that was a NOOP. DAG size: 364 [2020-10-28 00:38:13,785 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 00:38:13,786 INFO L93 Difference]: Finished difference Result 7025 states and 10912 transitions. [2020-10-28 00:38:13,786 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-28 00:38:13,786 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 319 [2020-10-28 00:38:13,787 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 00:38:13,812 INFO L225 Difference]: With dead ends: 7025 [2020-10-28 00:38:13,812 INFO L226 Difference]: Without dead ends: 4670 [2020-10-28 00:38:13,818 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 00:38:13,825 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4670 states. [2020-10-28 00:38:14,003 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4670 to 4601. [2020-10-28 00:38:14,004 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4601 states. [2020-10-28 00:38:14,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4601 states to 4601 states and 7133 transitions. [2020-10-28 00:38:14,023 INFO L78 Accepts]: Start accepts. Automaton has 4601 states and 7133 transitions. Word has length 319 [2020-10-28 00:38:14,024 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 00:38:14,024 INFO L481 AbstractCegarLoop]: Abstraction has 4601 states and 7133 transitions. [2020-10-28 00:38:14,024 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-28 00:38:14,024 INFO L276 IsEmpty]: Start isEmpty. Operand 4601 states and 7133 transitions. [2020-10-28 00:38:14,035 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 322 [2020-10-28 00:38:14,036 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 00:38:14,036 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 00:38:14,036 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-28 00:38:14,036 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 00:38:14,037 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 00:38:14,037 INFO L82 PathProgramCache]: Analyzing trace with hash 1530242200, now seen corresponding path program 1 times [2020-10-28 00:38:14,037 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 00:38:14,038 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1255826335] [2020-10-28 00:38:14,038 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 00:38:14,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:38:14,115 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:38:14,211 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:38:14,382 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:38:14,618 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:38:14,826 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:38:15,005 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:38:15,274 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:38:15,900 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:38:16,046 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:38:16,169 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:38:16,277 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:38:16,471 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:38:16,610 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:38:16,754 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:38:16,920 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:38:19,124 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:38:19,124 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 329 [2020-10-28 00:38:19,125 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 15 [2020-10-28 00:38:19,125 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5037 [2020-10-28 00:38:19,125 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:38:19,125 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-28 00:38:19,125 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 30 [2020-10-28 00:38:19,125 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 25 [2020-10-28 00:38:19,126 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:38:20,226 WARN L193 SmtUtils]: Spent 897.00 ms on a formula simplification that was a NOOP. DAG size: 358 [2020-10-28 00:38:20,229 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 00:38:20,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:38:20,246 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:38:20,264 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:38:20,264 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 00:38:20,265 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 00:38:20,265 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 23 [2020-10-28 00:38:20,265 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:38:20,265 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 00:38:20,265 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 00:38:20,265 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 00:38:20,266 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:38:20,481 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 00:38:20,481 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1255826335] [2020-10-28 00:38:20,481 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 00:38:20,482 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-28 00:38:20,482 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1777376191] [2020-10-28 00:38:20,483 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-28 00:38:20,483 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 00:38:20,484 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-28 00:38:20,485 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-28 00:38:20,485 INFO L87 Difference]: Start difference. First operand 4601 states and 7133 transitions. Second operand 5 states. [2020-10-28 00:38:32,832 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 00:38:32,833 INFO L93 Difference]: Finished difference Result 13465 states and 20803 transitions. [2020-10-28 00:38:32,833 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 00:38:32,833 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 321 [2020-10-28 00:38:32,834 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 00:38:32,878 INFO L225 Difference]: With dead ends: 13465 [2020-10-28 00:38:32,878 INFO L226 Difference]: Without dead ends: 9071 [2020-10-28 00:38:32,889 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-28 00:38:32,901 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9071 states. [2020-10-28 00:38:33,209 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9071 to 4697. [2020-10-28 00:38:33,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4697 states. [2020-10-28 00:38:33,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4697 states to 4697 states and 7300 transitions. [2020-10-28 00:38:33,223 INFO L78 Accepts]: Start accepts. Automaton has 4697 states and 7300 transitions. Word has length 321 [2020-10-28 00:38:33,223 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 00:38:33,223 INFO L481 AbstractCegarLoop]: Abstraction has 4697 states and 7300 transitions. [2020-10-28 00:38:33,223 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-28 00:38:33,224 INFO L276 IsEmpty]: Start isEmpty. Operand 4697 states and 7300 transitions. [2020-10-28 00:38:33,236 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 322 [2020-10-28 00:38:33,237 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 00:38:33,237 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 00:38:33,237 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-28 00:38:33,237 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 00:38:33,238 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 00:38:33,238 INFO L82 PathProgramCache]: Analyzing trace with hash 949074237, now seen corresponding path program 1 times [2020-10-28 00:38:33,238 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 00:38:33,239 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1133201704] [2020-10-28 00:38:33,239 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 00:38:33,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:38:33,355 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:38:33,450 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:38:33,561 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:38:33,669 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:38:33,809 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:38:33,983 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:38:34,216 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:38:34,349 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:38:34,465 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:38:34,573 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:38:34,775 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:38:34,868 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:38:35,265 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:38:36,523 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:38:36,715 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:38:36,885 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:38:38,322 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:38:38,322 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 329 [2020-10-28 00:38:38,322 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 16 [2020-10-28 00:38:38,322 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5015 [2020-10-28 00:38:38,322 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:38:38,323 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 00:38:38,323 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 30 [2020-10-28 00:38:38,323 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 159 [2020-10-28 00:38:38,323 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:38:39,322 WARN L193 SmtUtils]: Spent 869.00 ms on a formula simplification that was a NOOP. DAG size: 358 [2020-10-28 00:38:39,323 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 00:38:39,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:38:39,336 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:38:39,348 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:38:39,349 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 00:38:39,349 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 00:38:39,349 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 15 [2020-10-28 00:38:39,349 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:38:39,349 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 00:38:39,349 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 00:38:39,350 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 00:38:39,350 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:38:39,499 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 00:38:39,499 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1133201704] [2020-10-28 00:38:39,499 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 00:38:39,499 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 00:38:39,500 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [794559589] [2020-10-28 00:38:39,500 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 00:38:39,500 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 00:38:39,501 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 00:38:39,501 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 00:38:39,501 INFO L87 Difference]: Start difference. First operand 4697 states and 7300 transitions. Second operand 4 states. [2020-10-28 00:38:49,951 WARN L193 SmtUtils]: Spent 959.00 ms on a formula simplification that was a NOOP. DAG size: 363 [2020-10-28 00:38:52,409 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 00:38:52,409 INFO L93 Difference]: Finished difference Result 13719 states and 21254 transitions. [2020-10-28 00:38:52,410 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 00:38:52,410 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 321 [2020-10-28 00:38:52,414 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 00:38:52,474 INFO L225 Difference]: With dead ends: 13719 [2020-10-28 00:38:52,474 INFO L226 Difference]: Without dead ends: 9145 [2020-10-28 00:38:52,485 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 00:38:52,498 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9145 states. [2020-10-28 00:38:52,937 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9145 to 9020. [2020-10-28 00:38:52,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9020 states. [2020-10-28 00:38:52,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9020 states to 9020 states and 13908 transitions. [2020-10-28 00:38:52,964 INFO L78 Accepts]: Start accepts. Automaton has 9020 states and 13908 transitions. Word has length 321 [2020-10-28 00:38:52,965 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 00:38:52,965 INFO L481 AbstractCegarLoop]: Abstraction has 9020 states and 13908 transitions. [2020-10-28 00:38:52,965 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 00:38:52,965 INFO L276 IsEmpty]: Start isEmpty. Operand 9020 states and 13908 transitions. [2020-10-28 00:38:52,987 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 323 [2020-10-28 00:38:52,987 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 00:38:52,987 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 00:38:52,988 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-28 00:38:52,988 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 00:38:52,988 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 00:38:52,988 INFO L82 PathProgramCache]: Analyzing trace with hash -240835510, now seen corresponding path program 1 times [2020-10-28 00:38:52,988 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 00:38:52,989 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2125850125] [2020-10-28 00:38:52,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 00:38:53,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:38:53,057 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:38:53,116 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:38:53,285 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:38:53,501 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:38:53,651 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:38:53,781 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:38:53,871 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:38:53,941 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:38:54,034 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:38:54,095 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:38:54,271 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:38:54,428 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:38:54,568 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:38:57,241 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:38:57,500 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:38:57,650 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:38:57,808 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:38:58,042 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:38:58,042 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 330 [2020-10-28 00:38:58,043 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 17 [2020-10-28 00:38:58,043 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5006 [2020-10-28 00:38:58,043 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:38:58,043 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 00:38:58,043 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 31 [2020-10-28 00:38:58,043 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 91 [2020-10-28 00:38:58,043 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:38:58,978 WARN L193 SmtUtils]: Spent 850.00 ms on a formula simplification that was a NOOP. DAG size: 358 [2020-10-28 00:38:58,980 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 00:38:58,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:38:58,993 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:38:59,006 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:38:59,007 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 00:38:59,007 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 00:38:59,007 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 17 [2020-10-28 00:38:59,007 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:38:59,007 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 00:38:59,007 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 00:38:59,008 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 00:38:59,008 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:38:59,174 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 00:38:59,175 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2125850125] [2020-10-28 00:38:59,175 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 00:38:59,175 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 00:38:59,175 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1014787546] [2020-10-28 00:38:59,176 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 00:38:59,176 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 00:38:59,177 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 00:38:59,177 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 00:38:59,177 INFO L87 Difference]: Start difference. First operand 9020 states and 13908 transitions. Second operand 4 states. [2020-10-28 00:39:09,807 WARN L193 SmtUtils]: Spent 895.00 ms on a formula simplification that was a NOOP. DAG size: 363 [2020-10-28 00:39:11,484 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 00:39:11,485 INFO L93 Difference]: Finished difference Result 25466 states and 39129 transitions. [2020-10-28 00:39:11,487 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 00:39:11,487 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 322 [2020-10-28 00:39:11,487 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 00:39:11,525 INFO L225 Difference]: With dead ends: 25466 [2020-10-28 00:39:11,525 INFO L226 Difference]: Without dead ends: 16701 [2020-10-28 00:39:11,544 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-28 00:39:11,564 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16701 states. [2020-10-28 00:39:12,288 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16701 to 16608. [2020-10-28 00:39:12,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16608 states. [2020-10-28 00:39:12,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16608 states to 16608 states and 25405 transitions. [2020-10-28 00:39:12,329 INFO L78 Accepts]: Start accepts. Automaton has 16608 states and 25405 transitions. Word has length 322 [2020-10-28 00:39:12,330 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 00:39:12,330 INFO L481 AbstractCegarLoop]: Abstraction has 16608 states and 25405 transitions. [2020-10-28 00:39:12,330 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 00:39:12,330 INFO L276 IsEmpty]: Start isEmpty. Operand 16608 states and 25405 transitions. [2020-10-28 00:39:12,363 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 324 [2020-10-28 00:39:12,363 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 00:39:12,363 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 00:39:12,363 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-28 00:39:12,364 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 00:39:12,364 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 00:39:12,364 INFO L82 PathProgramCache]: Analyzing trace with hash -795060385, now seen corresponding path program 1 times [2020-10-28 00:39:12,364 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 00:39:12,365 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1891146109] [2020-10-28 00:39:12,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 00:39:12,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:39:12,428 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:39:12,475 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:39:12,554 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:39:12,616 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:39:12,732 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:39:12,831 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:39:12,973 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:39:13,082 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:39:13,289 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:39:13,369 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:39:13,486 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:39:13,572 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:39:13,658 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:39:13,737 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:39:16,117 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:39:17,433 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:39:17,433 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 331 [2020-10-28 00:39:17,433 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 15 [2020-10-28 00:39:17,433 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5027 [2020-10-28 00:39:17,433 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:39:17,434 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 00:39:17,434 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 52 [2020-10-28 00:39:17,434 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 5 [2020-10-28 00:39:17,434 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:39:18,477 WARN L193 SmtUtils]: Spent 969.00 ms on a formula simplification that was a NOOP. DAG size: 358 [2020-10-28 00:39:18,478 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 00:39:18,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:39:18,490 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:39:18,497 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:39:18,497 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 00:39:18,497 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 00:39:18,498 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-28 00:39:18,498 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:39:18,498 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 00:39:18,498 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 00:39:18,498 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 00:39:18,498 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:39:18,568 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 00:39:18,569 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1891146109] [2020-10-28 00:39:18,569 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 00:39:18,569 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 00:39:18,570 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1358767435] [2020-10-28 00:39:18,570 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 00:39:18,570 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 00:39:18,571 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 00:39:18,571 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 00:39:18,571 INFO L87 Difference]: Start difference. First operand 16608 states and 25405 transitions. Second operand 4 states. [2020-10-28 00:39:26,091 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 00:39:26,091 INFO L93 Difference]: Finished difference Result 47874 states and 72769 transitions. [2020-10-28 00:39:26,091 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-28 00:39:26,092 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 323 [2020-10-28 00:39:26,092 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 00:39:26,158 INFO L225 Difference]: With dead ends: 47874 [2020-10-28 00:39:26,159 INFO L226 Difference]: Without dead ends: 32236 [2020-10-28 00:39:26,195 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 00:39:26,231 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32236 states. [2020-10-28 00:39:27,192 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32236 to 16710. [2020-10-28 00:39:27,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16710 states. [2020-10-28 00:39:27,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16710 states to 16710 states and 25540 transitions. [2020-10-28 00:39:27,230 INFO L78 Accepts]: Start accepts. Automaton has 16710 states and 25540 transitions. Word has length 323 [2020-10-28 00:39:27,230 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 00:39:27,230 INFO L481 AbstractCegarLoop]: Abstraction has 16710 states and 25540 transitions. [2020-10-28 00:39:27,230 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 00:39:27,230 INFO L276 IsEmpty]: Start isEmpty. Operand 16710 states and 25540 transitions. [2020-10-28 00:39:27,257 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 325 [2020-10-28 00:39:27,257 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 00:39:27,257 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 00:39:27,258 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-28 00:39:27,258 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 00:39:27,258 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 00:39:27,259 INFO L82 PathProgramCache]: Analyzing trace with hash -674505218, now seen corresponding path program 1 times [2020-10-28 00:39:27,259 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 00:39:27,260 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [356245739] [2020-10-28 00:39:27,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 00:39:27,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:39:27,324 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:39:27,359 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:39:27,409 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:39:27,494 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:39:27,643 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:39:27,738 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:39:27,937 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:39:28,208 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:39:28,287 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:39:28,347 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:39:28,402 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:39:28,512 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:39:28,591 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:39:28,681 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:39:28,813 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:39:30,376 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:39:32,319 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:39:32,319 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 332 [2020-10-28 00:39:32,319 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 16 [2020-10-28 00:39:32,319 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5016 [2020-10-28 00:39:32,320 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:39:32,320 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-28 00:39:32,320 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 57 [2020-10-28 00:39:32,320 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 31 [2020-10-28 00:39:32,320 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:39:33,319 WARN L193 SmtUtils]: Spent 843.00 ms on a formula simplification that was a NOOP. DAG size: 358 [2020-10-28 00:39:33,320 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 00:39:33,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:39:33,330 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:39:33,344 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:39:33,344 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 00:39:33,344 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 00:39:33,345 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 16 [2020-10-28 00:39:33,345 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:39:33,345 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 00:39:33,345 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 00:39:33,345 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 00:39:33,345 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:39:33,434 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 00:39:33,435 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [356245739] [2020-10-28 00:39:33,435 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 00:39:33,435 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-28 00:39:33,436 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2081768727] [2020-10-28 00:39:33,436 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-28 00:39:33,437 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 00:39:33,437 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-28 00:39:33,437 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-28 00:39:33,438 INFO L87 Difference]: Start difference. First operand 16710 states and 25540 transitions. Second operand 5 states. [2020-10-28 00:39:40,168 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 00:39:40,168 INFO L93 Difference]: Finished difference Result 31202 states and 47471 transitions. [2020-10-28 00:39:40,169 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 00:39:40,169 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 324 [2020-10-28 00:39:40,169 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 00:39:40,201 INFO L225 Difference]: With dead ends: 31202 [2020-10-28 00:39:40,202 INFO L226 Difference]: Without dead ends: 15678 [2020-10-28 00:39:40,232 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-28 00:39:40,246 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15678 states. [2020-10-28 00:39:40,904 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15678 to 15620. [2020-10-28 00:39:40,904 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15620 states. [2020-10-28 00:39:40,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15620 states to 15620 states and 23875 transitions. [2020-10-28 00:39:40,928 INFO L78 Accepts]: Start accepts. Automaton has 15620 states and 23875 transitions. Word has length 324 [2020-10-28 00:39:40,928 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 00:39:40,928 INFO L481 AbstractCegarLoop]: Abstraction has 15620 states and 23875 transitions. [2020-10-28 00:39:40,929 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-28 00:39:40,929 INFO L276 IsEmpty]: Start isEmpty. Operand 15620 states and 23875 transitions. [2020-10-28 00:39:40,952 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 326 [2020-10-28 00:39:40,952 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 00:39:40,952 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 00:39:40,953 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-28 00:39:40,953 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 00:39:40,953 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 00:39:40,953 INFO L82 PathProgramCache]: Analyzing trace with hash 1536713624, now seen corresponding path program 1 times [2020-10-28 00:39:40,953 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 00:39:40,954 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [118725878] [2020-10-28 00:39:40,954 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 00:39:41,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:39:41,032 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:39:41,267 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:39:41,484 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:39:41,786 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:39:42,019 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:39:42,150 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:39:42,237 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:39:42,318 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:39:42,434 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:39:42,501 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:39:42,624 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:39:42,742 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:39:42,833 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:39:42,934 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:39:43,027 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:39:46,017 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:39:46,017 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 333 [2020-10-28 00:39:46,017 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 15 [2020-10-28 00:39:46,017 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5010 [2020-10-28 00:39:46,017 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:39:46,017 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 00:39:46,018 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 104 [2020-10-28 00:39:46,018 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-28 00:39:46,018 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:39:47,019 WARN L193 SmtUtils]: Spent 922.00 ms on a formula simplification that was a NOOP. DAG size: 358 [2020-10-28 00:39:47,021 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 00:39:47,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:39:47,036 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:39:47,059 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:39:47,059 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 00:39:47,059 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 00:39:47,059 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 26 [2020-10-28 00:39:47,060 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:39:47,060 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 00:39:47,060 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 00:39:47,060 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 00:39:47,060 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:39:47,160 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 00:39:47,160 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [118725878] [2020-10-28 00:39:47,161 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 00:39:47,161 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 00:39:47,161 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1836708621] [2020-10-28 00:39:47,162 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 00:39:47,162 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 00:39:47,162 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 00:39:47,163 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 00:39:47,163 INFO L87 Difference]: Start difference. First operand 15620 states and 23875 transitions. Second operand 4 states. [2020-10-28 00:39:56,137 WARN L193 SmtUtils]: Spent 908.00 ms on a formula simplification that was a NOOP. DAG size: 363 [2020-10-28 00:39:56,869 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 00:39:56,869 INFO L93 Difference]: Finished difference Result 36694 states and 56558 transitions. [2020-10-28 00:39:56,870 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 00:39:56,870 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 325 [2020-10-28 00:39:56,871 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 00:39:56,909 INFO L225 Difference]: With dead ends: 36694 [2020-10-28 00:39:56,910 INFO L226 Difference]: Without dead ends: 22991 [2020-10-28 00:39:56,932 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 00:39:56,955 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22991 states. [2020-10-28 00:39:57,905 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22991 to 19096. [2020-10-28 00:39:57,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19096 states. [2020-10-28 00:39:57,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19096 states to 19096 states and 29561 transitions. [2020-10-28 00:39:57,931 INFO L78 Accepts]: Start accepts. Automaton has 19096 states and 29561 transitions. Word has length 325 [2020-10-28 00:39:57,931 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 00:39:57,931 INFO L481 AbstractCegarLoop]: Abstraction has 19096 states and 29561 transitions. [2020-10-28 00:39:57,931 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 00:39:57,932 INFO L276 IsEmpty]: Start isEmpty. Operand 19096 states and 29561 transitions. [2020-10-28 00:39:57,954 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 328 [2020-10-28 00:39:57,955 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 00:39:57,955 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 00:39:57,955 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-28 00:39:57,956 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 00:39:57,956 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 00:39:57,956 INFO L82 PathProgramCache]: Analyzing trace with hash 1963905653, now seen corresponding path program 1 times [2020-10-28 00:39:57,956 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 00:39:57,957 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1703098180] [2020-10-28 00:39:57,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 00:39:58,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:39:58,038 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:39:58,120 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:39:58,260 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:39:58,386 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:39:58,504 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:39:58,652 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:39:58,728 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:39:58,806 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:39:58,861 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:39:58,928 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:39:59,060 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:39:59,107 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:39:59,282 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:39:59,348 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:39:59,452 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:39:59,525 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:40:03,027 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:40:03,027 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 335 [2020-10-28 00:40:03,027 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 16 [2020-10-28 00:40:03,027 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5020 [2020-10-28 00:40:03,028 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:40:03,028 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 00:40:03,028 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 104 [2020-10-28 00:40:03,028 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-28 00:40:03,028 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:40:03,974 WARN L193 SmtUtils]: Spent 861.00 ms on a formula simplification that was a NOOP. DAG size: 358 [2020-10-28 00:40:03,976 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 00:40:03,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:40:03,986 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:40:03,997 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:40:03,997 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 00:40:03,997 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 00:40:03,998 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 14 [2020-10-28 00:40:03,998 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:40:03,998 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 00:40:03,998 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 00:40:03,998 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 00:40:03,998 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:40:04,069 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 00:40:04,070 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1703098180] [2020-10-28 00:40:04,070 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 00:40:04,070 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 00:40:04,070 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [957751847] [2020-10-28 00:40:04,071 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 00:40:04,071 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 00:40:04,072 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 00:40:04,072 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 00:40:04,072 INFO L87 Difference]: Start difference. First operand 19096 states and 29561 transitions. Second operand 4 states. [2020-10-28 00:40:14,336 WARN L193 SmtUtils]: Spent 884.00 ms on a formula simplification that was a NOOP. DAG size: 363 [2020-10-28 00:40:14,783 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 00:40:14,784 INFO L93 Difference]: Finished difference Result 47838 states and 74574 transitions. [2020-10-28 00:40:14,784 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 00:40:14,785 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 327 [2020-10-28 00:40:14,785 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 00:40:14,829 INFO L225 Difference]: With dead ends: 47838 [2020-10-28 00:40:14,830 INFO L226 Difference]: Without dead ends: 30395 [2020-10-28 00:40:14,851 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-28 00:40:14,881 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30395 states. [2020-10-28 00:40:16,213 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30395 to 25280. [2020-10-28 00:40:16,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25280 states. [2020-10-28 00:40:16,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25280 states to 25280 states and 39691 transitions. [2020-10-28 00:40:16,251 INFO L78 Accepts]: Start accepts. Automaton has 25280 states and 39691 transitions. Word has length 327 [2020-10-28 00:40:16,251 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 00:40:16,251 INFO L481 AbstractCegarLoop]: Abstraction has 25280 states and 39691 transitions. [2020-10-28 00:40:16,251 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 00:40:16,251 INFO L276 IsEmpty]: Start isEmpty. Operand 25280 states and 39691 transitions. [2020-10-28 00:40:16,272 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 329 [2020-10-28 00:40:16,272 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 00:40:16,273 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 00:40:16,273 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-28 00:40:16,273 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 00:40:16,274 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 00:40:16,274 INFO L82 PathProgramCache]: Analyzing trace with hash -1276292288, now seen corresponding path program 1 times [2020-10-28 00:40:16,274 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 00:40:16,274 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1104189948] [2020-10-28 00:40:16,275 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 00:40:16,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:40:16,354 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:40:16,471 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:40:16,678 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:40:16,800 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:40:16,902 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:40:16,987 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:40:17,071 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:40:17,141 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:40:17,205 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:40:17,263 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:40:17,374 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:40:17,494 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:40:17,581 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:40:17,674 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:40:21,357 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:40:21,357 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 336 [2020-10-28 00:40:21,357 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 14 [2020-10-28 00:40:21,358 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5033 [2020-10-28 00:40:21,358 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:40:21,358 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-28 00:40:21,358 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 00:40:21,358 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 102 [2020-10-28 00:40:21,358 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:40:22,374 WARN L193 SmtUtils]: Spent 861.00 ms on a formula simplification that was a NOOP. DAG size: 358 [2020-10-28 00:40:22,376 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 00:40:22,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:40:22,385 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:40:22,394 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:40:22,395 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 00:40:22,395 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 00:40:22,395 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-10-28 00:40:22,395 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:40:22,395 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 00:40:22,395 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 00:40:22,395 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 00:40:22,395 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:40:22,506 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 00:40:22,506 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1104189948] [2020-10-28 00:40:22,506 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 00:40:22,506 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-28 00:40:22,506 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1498753342] [2020-10-28 00:40:22,507 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-28 00:40:22,507 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 00:40:22,508 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-28 00:40:22,508 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-28 00:40:22,508 INFO L87 Difference]: Start difference. First operand 25280 states and 39691 transitions. Second operand 5 states. [2020-10-28 00:40:30,602 WARN L193 SmtUtils]: Spent 1.01 s on a formula simplification that was a NOOP. DAG size: 364 [2020-10-28 00:40:32,751 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 00:40:32,752 INFO L93 Difference]: Finished difference Result 51319 states and 80527 transitions. [2020-10-28 00:40:32,752 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-28 00:40:32,752 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 328 [2020-10-28 00:40:32,753 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 00:40:32,792 INFO L225 Difference]: With dead ends: 51319 [2020-10-28 00:40:32,793 INFO L226 Difference]: Without dead ends: 26056 [2020-10-28 00:40:32,824 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 00:40:32,848 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26056 states. [2020-10-28 00:40:34,216 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26056 to 25305. [2020-10-28 00:40:34,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25305 states. [2020-10-28 00:40:34,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25305 states to 25305 states and 39733 transitions. [2020-10-28 00:40:34,255 INFO L78 Accepts]: Start accepts. Automaton has 25305 states and 39733 transitions. Word has length 328 [2020-10-28 00:40:34,256 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 00:40:34,256 INFO L481 AbstractCegarLoop]: Abstraction has 25305 states and 39733 transitions. [2020-10-28 00:40:34,256 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-28 00:40:34,256 INFO L276 IsEmpty]: Start isEmpty. Operand 25305 states and 39733 transitions. [2020-10-28 00:40:34,268 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 331 [2020-10-28 00:40:34,269 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 00:40:34,269 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 00:40:34,269 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-28 00:40:34,269 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 00:40:34,270 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 00:40:34,270 INFO L82 PathProgramCache]: Analyzing trace with hash -1596845432, now seen corresponding path program 1 times [2020-10-28 00:40:34,270 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 00:40:34,270 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [329985221] [2020-10-28 00:40:34,270 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 00:40:34,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:40:34,449 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:40:34,664 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:40:34,833 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:40:34,932 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:40:35,029 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:40:35,127 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:40:35,338 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:40:35,469 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:40:35,583 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:40:35,663 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:40:35,792 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:40:36,412 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:40:36,508 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:40:37,951 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:40:38,220 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:40:38,363 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:40:38,493 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:40:38,672 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:40:39,405 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:40:39,405 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 338 [2020-10-28 00:40:39,405 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 18 [2020-10-28 00:40:39,405 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5037 [2020-10-28 00:40:39,406 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:40:39,406 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-28 00:40:39,406 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 00:40:39,406 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 118 [2020-10-28 00:40:39,406 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:40:40,466 WARN L193 SmtUtils]: Spent 927.00 ms on a formula simplification that was a NOOP. DAG size: 358 [2020-10-28 00:40:40,467 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 00:40:40,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:40:40,479 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:40:40,493 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:40:40,493 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 00:40:40,493 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 00:40:40,493 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 17 [2020-10-28 00:40:40,494 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:40:40,494 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 00:40:40,494 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 00:40:40,494 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 00:40:40,494 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:40:40,638 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 00:40:40,638 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [329985221] [2020-10-28 00:40:40,638 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 00:40:40,638 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-28 00:40:40,639 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1370142761] [2020-10-28 00:40:40,639 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-28 00:40:40,639 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 00:40:40,640 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-28 00:40:40,640 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-28 00:40:40,640 INFO L87 Difference]: Start difference. First operand 25305 states and 39733 transitions. Second operand 5 states.