/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_lcr-var-start-time.4.2.ufo.BOUNDED-8.pals.c.v+cfa-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-28 00:11:01,710 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-28 00:11:01,714 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-28 00:11:01,770 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-28 00:11:01,771 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-28 00:11:01,774 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-28 00:11:01,776 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-28 00:11:01,782 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-28 00:11:01,784 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-28 00:11:01,785 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-28 00:11:01,787 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-28 00:11:01,788 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-28 00:11:01,789 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-28 00:11:01,790 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-28 00:11:01,791 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-28 00:11:01,792 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-28 00:11:01,794 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-28 00:11:01,795 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-28 00:11:01,797 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-28 00:11:01,806 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-28 00:11:01,811 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-28 00:11:01,813 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-28 00:11:01,814 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-28 00:11:01,816 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-28 00:11:01,824 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-28 00:11:01,825 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-28 00:11:01,833 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-28 00:11:01,836 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-28 00:11:01,837 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-28 00:11:01,838 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-28 00:11:01,840 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-28 00:11:01,841 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-28 00:11:01,842 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-28 00:11:01,842 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-28 00:11:01,844 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-28 00:11:01,845 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-28 00:11:01,846 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-28 00:11:01,846 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-28 00:11:01,847 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-28 00:11:01,848 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-28 00:11:01,848 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-28 00:11:01,853 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 00:11:01,901 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-28 00:11:01,902 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-28 00:11:01,906 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-28 00:11:01,907 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-28 00:11:01,907 INFO L138 SettingsManager]: * Use SBE=true [2020-10-28 00:11:01,908 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-28 00:11:01,908 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-28 00:11:01,908 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-28 00:11:01,908 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-28 00:11:01,909 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-28 00:11:01,910 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-28 00:11:01,910 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-28 00:11:01,911 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-28 00:11:01,911 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-28 00:11:01,911 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-28 00:11:01,911 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-28 00:11:01,912 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-28 00:11:01,912 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-28 00:11:01,912 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-28 00:11:01,912 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-28 00:11:01,913 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-28 00:11:01,913 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-28 00:11:01,914 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-28 00:11:01,914 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-28 00:11:01,914 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-28 00:11:01,914 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-28 00:11:01,915 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-28 00:11:01,915 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-28 00:11:01,915 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-28 00:11:01,915 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=DEEPEST;log-additional-information=true;unknown-allowed=true; [2020-10-28 00:11:02,320 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-28 00:11:02,356 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-28 00:11:02,359 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-28 00:11:02,360 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-28 00:11:02,361 INFO L275 PluginConnector]: CDTParser initialized [2020-10-28 00:11:02,362 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_lcr-var-start-time.4.2.ufo.BOUNDED-8.pals.c.v+cfa-reducer.c [2020-10-28 00:11:02,442 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/886660996/fd4c4b25c08d450b962d5a27289797e1/FLAG99b0bab63 [2020-10-28 00:11:03,079 INFO L306 CDTParser]: Found 1 translation units. [2020-10-28 00:11:03,079 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/seq-mthreaded-reduced/pals_lcr-var-start-time.4.2.ufo.BOUNDED-8.pals.c.v+cfa-reducer.c [2020-10-28 00:11:03,090 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/886660996/fd4c4b25c08d450b962d5a27289797e1/FLAG99b0bab63 [2020-10-28 00:11:03,361 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/886660996/fd4c4b25c08d450b962d5a27289797e1 [2020-10-28 00:11:03,364 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-28 00:11:03,386 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-28 00:11:03,387 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-28 00:11:03,388 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-28 00:11:03,393 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-28 00:11:03,394 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 12:11:03" (1/1) ... [2020-10-28 00:11:03,398 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@67787bf5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 12:11:03, skipping insertion in model container [2020-10-28 00:11:03,399 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 12:11:03" (1/1) ... [2020-10-28 00:11:03,407 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-28 00:11:03,474 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-28 00:11:03,707 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-28 00:11:03,722 INFO L203 MainTranslator]: Completed pre-run [2020-10-28 00:11:03,783 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-28 00:11:03,836 INFO L208 MainTranslator]: Completed translation [2020-10-28 00:11:03,836 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 12:11:03 WrapperNode [2020-10-28 00:11:03,837 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-28 00:11:03,847 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-28 00:11:03,848 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-28 00:11:03,848 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-28 00:11:03,869 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 12:11:03" (1/1) ... [2020-10-28 00:11:03,869 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 12:11:03" (1/1) ... [2020-10-28 00:11:03,900 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 12:11:03" (1/1) ... [2020-10-28 00:11:03,901 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 12:11:03" (1/1) ... [2020-10-28 00:11:03,928 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 12:11:03" (1/1) ... [2020-10-28 00:11:03,937 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 12:11:03" (1/1) ... [2020-10-28 00:11:03,941 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 12:11:03" (1/1) ... [2020-10-28 00:11:03,947 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-28 00:11:03,948 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-28 00:11:03,948 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-28 00:11:03,948 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-28 00:11:03,949 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 12:11:03" (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 00:11:04,030 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-28 00:11:04,030 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-28 00:11:04,030 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-28 00:11:04,030 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-10-28 00:11:04,030 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-28 00:11:04,031 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-28 00:11:04,031 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-28 00:11:04,031 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-28 00:11:04,031 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-28 00:11:04,031 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-10-28 00:11:04,031 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-10-28 00:11:04,032 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2020-10-28 00:11:04,032 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-10-28 00:11:04,032 INFO L130 BoogieDeclarations]: Found specification of procedure read [2020-10-28 00:11:04,032 INFO L130 BoogieDeclarations]: Found specification of procedure write [2020-10-28 00:11:04,032 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2020-10-28 00:11:04,032 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2020-10-28 00:11:04,032 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2020-10-28 00:11:04,033 INFO L130 BoogieDeclarations]: Found specification of procedure node4 [2020-10-28 00:11:04,033 INFO L130 BoogieDeclarations]: Found specification of procedure init [2020-10-28 00:11:04,033 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-10-28 00:11:04,033 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-28 00:11:04,033 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-28 00:11:04,033 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-28 00:11:04,033 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-28 00:11:04,034 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-28 00:11:04,034 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-28 00:11:04,034 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-28 00:11:04,997 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-28 00:11:04,997 INFO L298 CfgBuilder]: Removed 0 assume(true) statements. [2020-10-28 00:11:04,999 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 12:11:04 BoogieIcfgContainer [2020-10-28 00:11:04,999 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-28 00:11:05,016 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-28 00:11:05,016 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-28 00:11:05,020 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-28 00:11:05,020 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.10 12:11:03" (1/3) ... [2020-10-28 00:11:05,022 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5f66f689 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 12:11:05, skipping insertion in model container [2020-10-28 00:11:05,022 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 12:11:03" (2/3) ... [2020-10-28 00:11:05,022 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5f66f689 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 12:11:05, skipping insertion in model container [2020-10-28 00:11:05,023 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 12:11:04" (3/3) ... [2020-10-28 00:11:05,025 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_lcr-var-start-time.4.2.ufo.BOUNDED-8.pals.c.v+cfa-reducer.c [2020-10-28 00:11:05,037 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-28 00:11:05,042 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-28 00:11:05,055 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-28 00:11:05,083 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-28 00:11:05,083 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-28 00:11:05,083 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-28 00:11:05,083 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-28 00:11:05,083 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-28 00:11:05,084 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-28 00:11:05,084 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-28 00:11:05,084 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-28 00:11:05,105 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states. [2020-10-28 00:11:05,114 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-10-28 00:11:05,115 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 00:11:05,116 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] [2020-10-28 00:11:05,116 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 00:11:05,122 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 00:11:05,123 INFO L82 PathProgramCache]: Analyzing trace with hash -1343942174, now seen corresponding path program 1 times [2020-10-28 00:11:05,133 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 00:11:05,133 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2044568405] [2020-10-28 00:11:05,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 00:11:05,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:11:05,505 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:11:05,686 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:11:05,796 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:11:06,228 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:11:06,420 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:11:10,401 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:11:10,402 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 61 [2020-10-28 00:11:10,402 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-28 00:11:10,402 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-10-28 00:11:10,406 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:11:10,406 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 00:11:10,406 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 29 [2020-10-28 00:11:10,406 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-28 00:11:10,407 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-28 00:11:11,014 WARN L193 SmtUtils]: Spent 472.00 ms on a formula simplification that was a NOOP. DAG size: 151 [2020-10-28 00:11:11,021 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 00:11:11,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:11:11,068 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:11:11,103 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:11:11,104 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 00:11:11,104 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 00:11:11,104 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 52 [2020-10-28 00:11:11,105 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:11:11,106 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 00:11:11,106 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 00:11:11,107 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 00:11:11,107 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-28 00:11:11,152 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 00:11:11,153 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2044568405] [2020-10-28 00:11:11,156 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 00:11:11,157 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 00:11:11,158 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1877610390] [2020-10-28 00:11:11,166 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 00:11:11,167 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 00:11:11,191 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 00:11:11,192 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 00:11:11,195 INFO L87 Difference]: Start difference. First operand 114 states. Second operand 4 states. [2020-10-28 00:11:11,757 WARN L193 SmtUtils]: Spent 427.00 ms on a formula simplification that was a NOOP. DAG size: 155 [2020-10-28 00:11:12,660 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 00:11:12,661 INFO L93 Difference]: Finished difference Result 258 states and 410 transitions. [2020-10-28 00:11:12,662 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 00:11:12,663 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 53 [2020-10-28 00:11:12,664 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 00:11:12,675 INFO L225 Difference]: With dead ends: 258 [2020-10-28 00:11:12,675 INFO L226 Difference]: Without dead ends: 167 [2020-10-28 00:11:12,679 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-28 00:11:12,698 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2020-10-28 00:11:12,737 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 164. [2020-10-28 00:11:12,738 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 164 states. [2020-10-28 00:11:12,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 242 transitions. [2020-10-28 00:11:12,748 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 242 transitions. Word has length 53 [2020-10-28 00:11:12,751 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 00:11:12,751 INFO L481 AbstractCegarLoop]: Abstraction has 164 states and 242 transitions. [2020-10-28 00:11:12,751 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 00:11:12,752 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 242 transitions. [2020-10-28 00:11:12,757 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-10-28 00:11:12,757 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 00:11:12,757 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] [2020-10-28 00:11:12,758 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-28 00:11:12,758 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 00:11:12,759 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 00:11:12,759 INFO L82 PathProgramCache]: Analyzing trace with hash 19794605, now seen corresponding path program 1 times [2020-10-28 00:11:12,759 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 00:11:12,759 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [874128731] [2020-10-28 00:11:12,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 00:11:12,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:11:12,821 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:11:12,869 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:11:12,911 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:11:13,101 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:11:15,201 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:11:15,202 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 62 [2020-10-28 00:11:15,202 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-28 00:11:15,202 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2401 [2020-10-28 00:11:15,203 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:11:15,203 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 00:11:15,204 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 25 [2020-10-28 00:11:15,204 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-28 00:11:15,204 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 00:11:15,579 WARN L193 SmtUtils]: Spent 317.00 ms on a formula simplification that was a NOOP. DAG size: 151 [2020-10-28 00:11:15,580 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 00:11:15,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:11:15,589 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:11:15,600 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:11:15,601 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 00:11:15,601 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 00:11:15,601 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 14 [2020-10-28 00:11:15,601 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:11:15,601 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 00:11:15,602 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 00:11:15,602 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 00:11:15,602 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:11:15,624 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 00:11:15,624 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [874128731] [2020-10-28 00:11:15,625 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 00:11:15,625 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 00:11:15,625 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1172193308] [2020-10-28 00:11:15,627 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 00:11:15,627 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 00:11:15,627 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 00:11:15,628 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 00:11:15,628 INFO L87 Difference]: Start difference. First operand 164 states and 242 transitions. Second operand 4 states. [2020-10-28 00:11:15,912 WARN L193 SmtUtils]: Spent 243.00 ms on a formula simplification that was a NOOP. DAG size: 155 [2020-10-28 00:11:16,404 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 00:11:16,406 INFO L93 Difference]: Finished difference Result 398 states and 612 transitions. [2020-10-28 00:11:16,407 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 00:11:16,407 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 54 [2020-10-28 00:11:16,407 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 00:11:16,411 INFO L225 Difference]: With dead ends: 398 [2020-10-28 00:11:16,411 INFO L226 Difference]: Without dead ends: 265 [2020-10-28 00:11:16,412 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-28 00:11:16,413 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 265 states. [2020-10-28 00:11:16,459 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 265 to 262. [2020-10-28 00:11:16,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 262 states. [2020-10-28 00:11:16,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 262 states to 262 states and 397 transitions. [2020-10-28 00:11:16,461 INFO L78 Accepts]: Start accepts. Automaton has 262 states and 397 transitions. Word has length 54 [2020-10-28 00:11:16,462 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 00:11:16,462 INFO L481 AbstractCegarLoop]: Abstraction has 262 states and 397 transitions. [2020-10-28 00:11:16,462 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 00:11:16,462 INFO L276 IsEmpty]: Start isEmpty. Operand 262 states and 397 transitions. [2020-10-28 00:11:16,468 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-10-28 00:11:16,468 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 00:11:16,469 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] [2020-10-28 00:11:16,471 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-28 00:11:16,471 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 00:11:16,471 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 00:11:16,471 INFO L82 PathProgramCache]: Analyzing trace with hash 9688089, now seen corresponding path program 1 times [2020-10-28 00:11:16,472 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 00:11:16,472 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1579398039] [2020-10-28 00:11:16,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 00:11:16,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:11:16,524 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:11:16,552 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:11:16,615 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:11:17,660 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:11:17,661 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 63 [2020-10-28 00:11:17,661 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 00:11:17,661 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1151 [2020-10-28 00:11:17,661 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:11:17,661 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 00:11:17,661 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 21 [2020-10-28 00:11:17,662 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-28 00:11:17,662 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:11:17,934 WARN L193 SmtUtils]: Spent 209.00 ms on a formula simplification that was a NOOP. DAG size: 151 [2020-10-28 00:11:17,936 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 00:11:17,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:11:17,946 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:11:17,956 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:11:17,957 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 00:11:17,957 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 00:11:17,957 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12 [2020-10-28 00:11:17,958 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:11:17,958 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 00:11:17,958 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 00:11:17,958 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 00:11:17,958 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:11:17,975 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 00:11:17,975 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1579398039] [2020-10-28 00:11:17,975 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 00:11:17,976 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 00:11:17,977 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [268219780] [2020-10-28 00:11:17,978 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 00:11:17,978 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 00:11:17,979 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 00:11:17,980 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 00:11:17,980 INFO L87 Difference]: Start difference. First operand 262 states and 397 transitions. Second operand 4 states. [2020-10-28 00:11:18,226 WARN L193 SmtUtils]: Spent 210.00 ms on a formula simplification that was a NOOP. DAG size: 155 [2020-10-28 00:11:18,903 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 00:11:18,903 INFO L93 Difference]: Finished difference Result 660 states and 1025 transitions. [2020-10-28 00:11:18,904 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 00:11:18,904 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 55 [2020-10-28 00:11:18,919 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 00:11:18,924 INFO L225 Difference]: With dead ends: 660 [2020-10-28 00:11:18,925 INFO L226 Difference]: Without dead ends: 429 [2020-10-28 00:11:18,928 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-28 00:11:18,933 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 429 states. [2020-10-28 00:11:18,985 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 429 to 426. [2020-10-28 00:11:18,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 426 states. [2020-10-28 00:11:18,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 426 states to 426 states and 653 transitions. [2020-10-28 00:11:18,991 INFO L78 Accepts]: Start accepts. Automaton has 426 states and 653 transitions. Word has length 55 [2020-10-28 00:11:18,992 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 00:11:18,992 INFO L481 AbstractCegarLoop]: Abstraction has 426 states and 653 transitions. [2020-10-28 00:11:18,992 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 00:11:18,992 INFO L276 IsEmpty]: Start isEmpty. Operand 426 states and 653 transitions. [2020-10-28 00:11:18,993 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-10-28 00:11:18,994 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 00:11:18,994 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] [2020-10-28 00:11:18,994 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-28 00:11:18,994 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 00:11:18,995 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 00:11:18,995 INFO L82 PathProgramCache]: Analyzing trace with hash 515300492, now seen corresponding path program 1 times [2020-10-28 00:11:18,995 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 00:11:18,995 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [256789525] [2020-10-28 00:11:18,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 00:11:19,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:11:19,038 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:11:19,067 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:11:19,524 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:11:19,525 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 64 [2020-10-28 00:11:19,525 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 00:11:19,525 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 502 [2020-10-28 00:11:19,525 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:11:19,525 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 00:11:19,526 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 17 [2020-10-28 00:11:19,526 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-28 00:11:19,526 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:11:19,770 WARN L193 SmtUtils]: Spent 203.00 ms on a formula simplification that was a NOOP. DAG size: 151 [2020-10-28 00:11:19,771 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 00:11:19,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:11:19,784 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:11:19,794 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:11:19,795 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 00:11:19,795 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 00:11:19,795 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-10-28 00:11:19,795 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:11:19,795 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 00:11:19,795 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 00:11:19,795 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 00:11:19,796 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:11:19,810 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 00:11:19,810 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [256789525] [2020-10-28 00:11:19,811 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 00:11:19,811 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 00:11:19,812 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [644618643] [2020-10-28 00:11:19,812 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 00:11:19,812 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 00:11:19,813 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 00:11:19,813 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 00:11:19,813 INFO L87 Difference]: Start difference. First operand 426 states and 653 transitions. Second operand 4 states. [2020-10-28 00:11:20,065 WARN L193 SmtUtils]: Spent 219.00 ms on a formula simplification that was a NOOP. DAG size: 155 [2020-10-28 00:11:20,740 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 00:11:20,740 INFO L93 Difference]: Finished difference Result 1128 states and 1753 transitions. [2020-10-28 00:11:20,741 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 00:11:20,741 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 56 [2020-10-28 00:11:20,744 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 00:11:20,748 INFO L225 Difference]: With dead ends: 1128 [2020-10-28 00:11:20,748 INFO L226 Difference]: Without dead ends: 733 [2020-10-28 00:11:20,752 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-28 00:11:20,754 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 733 states. [2020-10-28 00:11:20,811 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 733 to 730. [2020-10-28 00:11:20,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 730 states. [2020-10-28 00:11:20,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 730 states to 730 states and 1121 transitions. [2020-10-28 00:11:20,816 INFO L78 Accepts]: Start accepts. Automaton has 730 states and 1121 transitions. Word has length 56 [2020-10-28 00:11:20,816 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 00:11:20,816 INFO L481 AbstractCegarLoop]: Abstraction has 730 states and 1121 transitions. [2020-10-28 00:11:20,816 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 00:11:20,816 INFO L276 IsEmpty]: Start isEmpty. Operand 730 states and 1121 transitions. [2020-10-28 00:11:20,818 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-10-28 00:11:20,818 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 00:11:20,818 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] [2020-10-28 00:11:20,818 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-28 00:11:20,818 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 00:11:20,819 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 00:11:20,819 INFO L82 PathProgramCache]: Analyzing trace with hash 1568707745, now seen corresponding path program 1 times [2020-10-28 00:11:20,819 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 00:11:20,819 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1903125665] [2020-10-28 00:11:20,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 00:11:20,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:11:20,859 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:11:20,888 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:11:21,875 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:11:21,875 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 64 [2020-10-28 00:11:21,879 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 00:11:21,879 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1029 [2020-10-28 00:11:21,880 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:11:21,880 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-28 00:11:21,880 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-28 00:11:21,880 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 43 [2020-10-28 00:11:21,880 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:11:22,181 WARN L193 SmtUtils]: Spent 208.00 ms on a formula simplification that was a NOOP. DAG size: 151 [2020-10-28 00:11:22,182 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 00:11:22,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:11:22,192 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:11:22,200 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:11:22,200 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 00:11:22,200 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 00:11:22,201 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-10-28 00:11:22,201 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:11:22,201 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 00:11:22,201 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 00:11:22,201 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 00:11:22,201 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:11:22,221 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 00:11:22,221 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1903125665] [2020-10-28 00:11:22,222 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 00:11:22,222 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-28 00:11:22,222 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1737648848] [2020-10-28 00:11:22,223 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-28 00:11:22,224 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 00:11:22,224 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-28 00:11:22,225 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-10-28 00:11:22,225 INFO L87 Difference]: Start difference. First operand 730 states and 1121 transitions. Second operand 7 states. [2020-10-28 00:11:22,534 WARN L193 SmtUtils]: Spent 255.00 ms on a formula simplification that was a NOOP. DAG size: 159 [2020-10-28 00:11:23,315 WARN L193 SmtUtils]: Spent 185.00 ms on a formula simplification that was a NOOP. DAG size: 153 [2020-10-28 00:11:23,545 WARN L193 SmtUtils]: Spent 210.00 ms on a formula simplification that was a NOOP. DAG size: 155 [2020-10-28 00:11:23,785 WARN L193 SmtUtils]: Spent 220.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-28 00:11:23,954 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 00:11:23,955 INFO L93 Difference]: Finished difference Result 4225 states and 6571 transitions. [2020-10-28 00:11:23,955 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-28 00:11:23,956 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 56 [2020-10-28 00:11:23,956 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 00:11:23,977 INFO L225 Difference]: With dead ends: 4225 [2020-10-28 00:11:23,978 INFO L226 Difference]: Without dead ends: 3526 [2020-10-28 00:11:23,981 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=63, Invalid=119, Unknown=0, NotChecked=0, Total=182 [2020-10-28 00:11:23,986 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3526 states. [2020-10-28 00:11:24,119 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3526 to 1426. [2020-10-28 00:11:24,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1426 states. [2020-10-28 00:11:24,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1426 states to 1426 states and 2177 transitions. [2020-10-28 00:11:24,128 INFO L78 Accepts]: Start accepts. Automaton has 1426 states and 2177 transitions. Word has length 56 [2020-10-28 00:11:24,128 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 00:11:24,128 INFO L481 AbstractCegarLoop]: Abstraction has 1426 states and 2177 transitions. [2020-10-28 00:11:24,129 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-28 00:11:24,129 INFO L276 IsEmpty]: Start isEmpty. Operand 1426 states and 2177 transitions. [2020-10-28 00:11:24,130 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-10-28 00:11:24,130 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 00:11:24,130 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] [2020-10-28 00:11:24,130 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-28 00:11:24,131 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 00:11:24,131 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 00:11:24,131 INFO L82 PathProgramCache]: Analyzing trace with hash 810563249, now seen corresponding path program 1 times [2020-10-28 00:11:24,131 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 00:11:24,132 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1635082128] [2020-10-28 00:11:24,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 00:11:24,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:11:24,172 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:11:24,275 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:11:24,621 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:11:24,622 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 65 [2020-10-28 00:11:24,622 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 00:11:24,622 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 465 [2020-10-28 00:11:24,622 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:11:24,622 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-28 00:11:24,623 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 58 [2020-10-28 00:11:24,623 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 3 [2020-10-28 00:11:24,623 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:11:24,886 WARN L193 SmtUtils]: Spent 186.00 ms on a formula simplification that was a NOOP. DAG size: 151 [2020-10-28 00:11:24,891 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 00:11:24,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:11:24,899 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:11:24,908 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:11:24,908 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 00:11:24,909 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 00:11:24,909 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-10-28 00:11:24,909 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:11:24,909 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 00:11:24,909 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 00:11:24,909 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 00:11:24,909 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:11:24,926 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 00:11:24,926 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1635082128] [2020-10-28 00:11:24,927 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 00:11:24,927 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-28 00:11:24,930 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [713311266] [2020-10-28 00:11:24,931 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-28 00:11:24,931 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 00:11:24,931 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-28 00:11:24,932 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-28 00:11:24,932 INFO L87 Difference]: Start difference. First operand 1426 states and 2177 transitions. Second operand 5 states. [2020-10-28 00:11:25,775 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 00:11:25,776 INFO L93 Difference]: Finished difference Result 2885 states and 4387 transitions. [2020-10-28 00:11:25,776 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-28 00:11:25,777 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 57 [2020-10-28 00:11:25,778 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 00:11:25,794 INFO L225 Difference]: With dead ends: 2885 [2020-10-28 00:11:25,794 INFO L226 Difference]: Without dead ends: 2882 [2020-10-28 00:11:25,796 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-28 00:11:25,799 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2882 states. [2020-10-28 00:11:25,976 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2882 to 1490. [2020-10-28 00:11:25,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1490 states. [2020-10-28 00:11:25,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1490 states to 1490 states and 2241 transitions. [2020-10-28 00:11:25,985 INFO L78 Accepts]: Start accepts. Automaton has 1490 states and 2241 transitions. Word has length 57 [2020-10-28 00:11:25,985 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 00:11:25,985 INFO L481 AbstractCegarLoop]: Abstraction has 1490 states and 2241 transitions. [2020-10-28 00:11:25,985 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-28 00:11:25,986 INFO L276 IsEmpty]: Start isEmpty. Operand 1490 states and 2241 transitions. [2020-10-28 00:11:25,989 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-10-28 00:11:25,989 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 00:11:25,989 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 00:11:25,989 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-28 00:11:25,990 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 00:11:25,990 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 00:11:25,990 INFO L82 PathProgramCache]: Analyzing trace with hash -344352302, now seen corresponding path program 1 times [2020-10-28 00:11:25,990 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 00:11:25,991 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [183539384] [2020-10-28 00:11:25,991 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 00:11:26,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:11:26,033 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:11:26,059 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:11:26,458 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:11:26,459 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 66 [2020-10-28 00:11:26,459 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 00:11:26,459 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 440 [2020-10-28 00:11:26,459 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:11:26,459 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-28 00:11:26,459 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-28 00:11:26,460 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 41 [2020-10-28 00:11:26,460 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:11:26,730 WARN L193 SmtUtils]: Spent 178.00 ms on a formula simplification that was a NOOP. DAG size: 151 [2020-10-28 00:11:26,731 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 00:11:26,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:11:26,739 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:11:26,751 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:11:26,752 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 00:11:26,752 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 00:11:26,752 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 14 [2020-10-28 00:11:26,752 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:11:26,752 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 00:11:26,753 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 00:11:26,753 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 00:11:26,753 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:11:26,782 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 00:11:26,783 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [183539384] [2020-10-28 00:11:26,783 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 00:11:26,783 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-28 00:11:26,783 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1686892738] [2020-10-28 00:11:26,784 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-28 00:11:26,784 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 00:11:26,784 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-28 00:11:26,784 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-10-28 00:11:26,785 INFO L87 Difference]: Start difference. First operand 1490 states and 2241 transitions. Second operand 7 states. [2020-10-28 00:11:27,474 WARN L193 SmtUtils]: Spent 205.00 ms on a formula simplification that was a NOOP. DAG size: 162 [2020-10-28 00:11:27,703 WARN L193 SmtUtils]: Spent 204.00 ms on a formula simplification that was a NOOP. DAG size: 160 [2020-10-28 00:11:27,938 WARN L193 SmtUtils]: Spent 212.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-28 00:11:28,147 WARN L193 SmtUtils]: Spent 181.00 ms on a formula simplification that was a NOOP. DAG size: 164 [2020-10-28 00:11:29,043 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 00:11:29,043 INFO L93 Difference]: Finished difference Result 6510 states and 9737 transitions. [2020-10-28 00:11:29,043 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-28 00:11:29,044 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 58 [2020-10-28 00:11:29,044 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 00:11:29,071 INFO L225 Difference]: With dead ends: 6510 [2020-10-28 00:11:29,072 INFO L226 Difference]: Without dead ends: 5051 [2020-10-28 00:11:29,078 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=45, Invalid=65, Unknown=0, NotChecked=0, Total=110 [2020-10-28 00:11:29,085 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5051 states. [2020-10-28 00:11:29,578 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5051 to 5042. [2020-10-28 00:11:29,578 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5042 states. [2020-10-28 00:11:29,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5042 states to 5042 states and 7489 transitions. [2020-10-28 00:11:29,605 INFO L78 Accepts]: Start accepts. Automaton has 5042 states and 7489 transitions. Word has length 58 [2020-10-28 00:11:29,607 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 00:11:29,607 INFO L481 AbstractCegarLoop]: Abstraction has 5042 states and 7489 transitions. [2020-10-28 00:11:29,607 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-28 00:11:29,607 INFO L276 IsEmpty]: Start isEmpty. Operand 5042 states and 7489 transitions. [2020-10-28 00:11:29,609 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2020-10-28 00:11:29,609 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 00:11:29,610 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] [2020-10-28 00:11:29,610 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-28 00:11:29,610 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 00:11:29,611 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 00:11:29,611 INFO L82 PathProgramCache]: Analyzing trace with hash 1249772891, now seen corresponding path program 1 times [2020-10-28 00:11:29,611 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 00:11:29,616 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1571952679] [2020-10-28 00:11:29,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 00:11:29,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:11:29,659 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:11:29,689 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:11:30,033 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:11:30,034 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 68 [2020-10-28 00:11:30,034 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 00:11:30,034 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 389 [2020-10-28 00:11:30,034 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:11:30,034 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 00:11:30,034 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-28 00:11:30,035 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 49 [2020-10-28 00:11:30,035 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:11:30,251 WARN L193 SmtUtils]: Spent 180.00 ms on a formula simplification that was a NOOP. DAG size: 151 [2020-10-28 00:11:30,252 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 00:11:30,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:11:30,260 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:11:30,269 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:11:30,270 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 00:11:30,270 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 00:11:30,270 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-10-28 00:11:30,270 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:11:30,270 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 00:11:30,270 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 00:11:30,270 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 00:11:30,271 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:11:30,284 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 00:11:30,284 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1571952679] [2020-10-28 00:11:30,285 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 00:11:30,285 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 00:11:30,285 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1549072879] [2020-10-28 00:11:30,286 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 00:11:30,286 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 00:11:30,288 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 00:11:30,288 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 00:11:30,288 INFO L87 Difference]: Start difference. First operand 5042 states and 7489 transitions. Second operand 4 states. [2020-10-28 00:11:30,506 WARN L193 SmtUtils]: Spent 188.00 ms on a formula simplification that was a NOOP. DAG size: 153 [2020-10-28 00:11:31,444 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 00:11:31,445 INFO L93 Difference]: Finished difference Result 12178 states and 18091 transitions. [2020-10-28 00:11:31,445 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 00:11:31,445 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 60 [2020-10-28 00:11:31,446 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 00:11:31,482 INFO L225 Difference]: With dead ends: 12178 [2020-10-28 00:11:31,482 INFO L226 Difference]: Without dead ends: 7167 [2020-10-28 00:11:31,494 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-28 00:11:31,503 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7167 states. [2020-10-28 00:11:32,096 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7167 to 7164. [2020-10-28 00:11:32,097 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7164 states. [2020-10-28 00:11:32,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7164 states to 7164 states and 10575 transitions. [2020-10-28 00:11:32,120 INFO L78 Accepts]: Start accepts. Automaton has 7164 states and 10575 transitions. Word has length 60 [2020-10-28 00:11:32,120 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 00:11:32,120 INFO L481 AbstractCegarLoop]: Abstraction has 7164 states and 10575 transitions. [2020-10-28 00:11:32,120 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 00:11:32,120 INFO L276 IsEmpty]: Start isEmpty. Operand 7164 states and 10575 transitions. [2020-10-28 00:11:32,126 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2020-10-28 00:11:32,126 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 00:11:32,126 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 00:11:32,127 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-28 00:11:32,127 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 00:11:32,127 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 00:11:32,127 INFO L82 PathProgramCache]: Analyzing trace with hash -221437708, now seen corresponding path program 1 times [2020-10-28 00:11:32,128 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 00:11:32,128 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2112606666] [2020-10-28 00:11:32,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 00:11:32,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:11:32,173 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:11:32,301 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:11:32,677 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:11:32,678 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 89 [2020-10-28 00:11:32,678 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 00:11:32,678 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 524 [2020-10-28 00:11:32,678 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:11:32,678 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-28 00:11:32,679 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-28 00:11:32,679 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 70 [2020-10-28 00:11:32,679 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:11:32,969 WARN L193 SmtUtils]: Spent 198.00 ms on a formula simplification that was a NOOP. DAG size: 151 [2020-10-28 00:11:32,970 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 00:11:32,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:11:32,980 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:11:32,986 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:11:32,987 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 00:11:32,987 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 00:11:32,987 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-28 00:11:32,987 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:11:32,987 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 00:11:32,987 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 00:11:32,987 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 00:11:32,988 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:11:33,017 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-28 00:11:33,018 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2112606666] [2020-10-28 00:11:33,018 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 00:11:33,019 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-28 00:11:33,019 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1668396590] [2020-10-28 00:11:33,019 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-28 00:11:33,019 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 00:11:33,020 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-28 00:11:33,020 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-28 00:11:33,020 INFO L87 Difference]: Start difference. First operand 7164 states and 10575 transitions. Second operand 5 states. [2020-10-28 00:11:33,266 WARN L193 SmtUtils]: Spent 210.00 ms on a formula simplification that was a NOOP. DAG size: 159 [2020-10-28 00:11:34,148 WARN L193 SmtUtils]: Spent 239.00 ms on a formula simplification that was a NOOP. DAG size: 153 [2020-10-28 00:11:34,895 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 00:11:34,896 INFO L93 Difference]: Finished difference Result 16901 states and 25045 transitions. [2020-10-28 00:11:34,896 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-28 00:11:34,896 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 81 [2020-10-28 00:11:34,897 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 00:11:34,957 INFO L225 Difference]: With dead ends: 16901 [2020-10-28 00:11:34,957 INFO L226 Difference]: Without dead ends: 11890 [2020-10-28 00:11:34,972 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2020-10-28 00:11:34,987 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11890 states. [2020-10-28 00:11:35,961 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11890 to 11884. [2020-10-28 00:11:35,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11884 states. [2020-10-28 00:11:35,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11884 states to 11884 states and 17455 transitions. [2020-10-28 00:11:35,985 INFO L78 Accepts]: Start accepts. Automaton has 11884 states and 17455 transitions. Word has length 81 [2020-10-28 00:11:35,985 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 00:11:35,986 INFO L481 AbstractCegarLoop]: Abstraction has 11884 states and 17455 transitions. [2020-10-28 00:11:35,986 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-28 00:11:35,986 INFO L276 IsEmpty]: Start isEmpty. Operand 11884 states and 17455 transitions. [2020-10-28 00:11:35,991 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2020-10-28 00:11:35,991 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 00:11:35,992 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 00:11:35,992 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-28 00:11:35,992 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 00:11:35,993 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 00:11:35,993 INFO L82 PathProgramCache]: Analyzing trace with hash 1914713524, now seen corresponding path program 1 times [2020-10-28 00:11:35,993 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 00:11:35,993 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1775287299] [2020-10-28 00:11:35,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 00:11:36,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:11:36,031 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:11:36,060 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:11:36,100 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:11:36,307 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:11:36,391 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:11:38,916 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:11:41,016 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:11:41,016 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 90 [2020-10-28 00:11:41,016 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-28 00:11:41,017 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4999 [2020-10-28 00:11:41,017 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:11:41,017 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 00:11:41,017 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 39 [2020-10-28 00:11:41,017 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-10-28 00:11:41,017 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:11:41,343 WARN L193 SmtUtils]: Spent 257.00 ms on a formula simplification that was a NOOP. DAG size: 151 [2020-10-28 00:11:41,343 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 00:11:41,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:11:41,352 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:11:41,361 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:11:41,361 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 00:11:41,361 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 00:11:41,361 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-28 00:11:41,362 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:11:41,362 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 00:11:41,362 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 00:11:41,362 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 00:11:41,362 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:11:41,384 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 00:11:41,384 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1775287299] [2020-10-28 00:11:41,385 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 00:11:41,385 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 00:11:41,385 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1182743941] [2020-10-28 00:11:41,385 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 00:11:41,386 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 00:11:41,386 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 00:11:41,386 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 00:11:41,386 INFO L87 Difference]: Start difference. First operand 11884 states and 17455 transitions. Second operand 4 states. [2020-10-28 00:11:41,612 WARN L193 SmtUtils]: Spent 193.00 ms on a formula simplification that was a NOOP. DAG size: 155 [2020-10-28 00:11:43,058 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 00:11:43,058 INFO L93 Difference]: Finished difference Result 29794 states and 43747 transitions. [2020-10-28 00:11:43,059 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 00:11:43,059 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 82 [2020-10-28 00:11:43,059 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 00:11:43,105 INFO L225 Difference]: With dead ends: 29794 [2020-10-28 00:11:43,105 INFO L226 Difference]: Without dead ends: 20455 [2020-10-28 00:11:43,127 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-28 00:11:43,155 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20455 states. [2020-10-28 00:11:44,398 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20455 to 20452. [2020-10-28 00:11:44,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20452 states. [2020-10-28 00:11:44,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20452 states to 20452 states and 29735 transitions. [2020-10-28 00:11:44,428 INFO L78 Accepts]: Start accepts. Automaton has 20452 states and 29735 transitions. Word has length 82 [2020-10-28 00:11:44,428 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 00:11:44,428 INFO L481 AbstractCegarLoop]: Abstraction has 20452 states and 29735 transitions. [2020-10-28 00:11:44,428 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 00:11:44,428 INFO L276 IsEmpty]: Start isEmpty. Operand 20452 states and 29735 transitions. [2020-10-28 00:11:44,437 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2020-10-28 00:11:44,437 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 00:11:44,438 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 00:11:44,438 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-28 00:11:44,438 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 00:11:44,438 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 00:11:44,438 INFO L82 PathProgramCache]: Analyzing trace with hash -35206881, now seen corresponding path program 1 times [2020-10-28 00:11:44,439 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 00:11:44,439 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [660949762] [2020-10-28 00:11:44,439 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 00:11:44,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:11:44,480 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:11:44,512 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:11:44,539 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:11:45,063 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:11:45,587 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:11:47,456 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:11:47,456 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 90 [2020-10-28 00:11:47,456 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-28 00:11:47,457 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2992 [2020-10-28 00:11:47,457 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:11:47,457 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 00:11:47,457 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 36 [2020-10-28 00:11:47,457 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 34 [2020-10-28 00:11:47,457 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:11:47,790 WARN L193 SmtUtils]: Spent 265.00 ms on a formula simplification that was a NOOP. DAG size: 151 [2020-10-28 00:11:47,791 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 00:11:47,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:11:47,803 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:11:47,812 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:11:47,812 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 00:11:47,812 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 00:11:47,812 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-10-28 00:11:47,812 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:11:47,813 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 00:11:47,813 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 00:11:47,813 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 00:11:47,813 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:11:47,839 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 8 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 00:11:47,840 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [660949762] [2020-10-28 00:11:47,840 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 00:11:47,840 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-28 00:11:47,841 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [126081602] [2020-10-28 00:11:47,841 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-28 00:11:47,842 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 00:11:47,842 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-28 00:11:47,842 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-28 00:11:47,843 INFO L87 Difference]: Start difference. First operand 20452 states and 29735 transitions. Second operand 6 states. [2020-10-28 00:11:49,025 WARN L193 SmtUtils]: Spent 215.00 ms on a formula simplification that was a NOOP. DAG size: 153 [2020-10-28 00:11:49,400 WARN L193 SmtUtils]: Spent 210.00 ms on a formula simplification that was a NOOP. DAG size: 152 [2020-10-28 00:11:51,101 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 00:11:51,102 INFO L93 Difference]: Finished difference Result 56543 states and 81705 transitions. [2020-10-28 00:11:51,102 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-28 00:11:51,102 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 82 [2020-10-28 00:11:51,102 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 00:11:51,179 INFO L225 Difference]: With dead ends: 56543 [2020-10-28 00:11:51,179 INFO L226 Difference]: Without dead ends: 36124 [2020-10-28 00:11:51,220 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2020-10-28 00:11:51,260 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36124 states. [2020-10-28 00:11:53,042 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36124 to 21508. [2020-10-28 00:11:53,042 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21508 states. [2020-10-28 00:11:53,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21508 states to 21508 states and 30919 transitions. [2020-10-28 00:11:53,076 INFO L78 Accepts]: Start accepts. Automaton has 21508 states and 30919 transitions. Word has length 82 [2020-10-28 00:11:53,076 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 00:11:53,076 INFO L481 AbstractCegarLoop]: Abstraction has 21508 states and 30919 transitions. [2020-10-28 00:11:53,076 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-28 00:11:53,076 INFO L276 IsEmpty]: Start isEmpty. Operand 21508 states and 30919 transitions. [2020-10-28 00:11:53,085 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2020-10-28 00:11:53,086 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 00:11:53,086 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 00:11:53,086 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-28 00:11:53,087 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 00:11:53,087 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 00:11:53,087 INFO L82 PathProgramCache]: Analyzing trace with hash 1377457056, now seen corresponding path program 1 times [2020-10-28 00:11:53,087 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 00:11:53,088 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1507321968] [2020-10-28 00:11:53,088 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 00:11:53,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:11:53,129 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:11:53,163 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:11:53,269 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:11:53,589 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:11:53,734 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:11:53,869 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:11:54,028 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:11:56,247 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:11:58,118 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:11:58,119 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 90 [2020-10-28 00:11:58,119 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-28 00:11:58,119 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5006 [2020-10-28 00:11:58,119 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:11:58,120 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 00:11:58,120 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 50 [2020-10-28 00:11:58,120 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 25 [2020-10-28 00:11:58,120 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:11:58,361 WARN L193 SmtUtils]: Spent 200.00 ms on a formula simplification that was a NOOP. DAG size: 151 [2020-10-28 00:11:58,362 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 00:11:58,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:11:58,369 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:11:58,376 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:11:58,376 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 00:11:58,376 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 00:11:58,376 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-28 00:11:58,377 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:11:58,377 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 00:11:58,377 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 00:11:58,377 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 00:11:58,377 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:11:58,396 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 00:11:58,399 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1507321968] [2020-10-28 00:11:58,400 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 00:11:58,400 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 00:11:58,400 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [931293489] [2020-10-28 00:11:58,400 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 00:11:58,400 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 00:11:58,401 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 00:11:58,401 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 00:11:58,401 INFO L87 Difference]: Start difference. First operand 21508 states and 30919 transitions. Second operand 4 states. [2020-10-28 00:11:58,627 WARN L193 SmtUtils]: Spent 192.00 ms on a formula simplification that was a NOOP. DAG size: 155 [2020-10-28 00:12:00,741 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 00:12:00,741 INFO L93 Difference]: Finished difference Result 43904 states and 63035 transitions. [2020-10-28 00:12:00,742 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 00:12:00,742 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 82 [2020-10-28 00:12:00,742 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 00:12:00,808 INFO L225 Difference]: With dead ends: 43904 [2020-10-28 00:12:00,808 INFO L226 Difference]: Without dead ends: 30877 [2020-10-28 00:12:00,836 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-28 00:12:00,878 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30877 states. [2020-10-28 00:12:02,806 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30877 to 28498. [2020-10-28 00:12:02,806 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28498 states. [2020-10-28 00:12:02,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28498 states to 28498 states and 40499 transitions. [2020-10-28 00:12:02,866 INFO L78 Accepts]: Start accepts. Automaton has 28498 states and 40499 transitions. Word has length 82 [2020-10-28 00:12:02,867 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 00:12:02,867 INFO L481 AbstractCegarLoop]: Abstraction has 28498 states and 40499 transitions. [2020-10-28 00:12:02,867 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 00:12:02,867 INFO L276 IsEmpty]: Start isEmpty. Operand 28498 states and 40499 transitions. [2020-10-28 00:12:02,877 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2020-10-28 00:12:02,878 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 00:12:02,878 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 00:12:02,878 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-28 00:12:02,878 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 00:12:02,879 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 00:12:02,879 INFO L82 PathProgramCache]: Analyzing trace with hash -829551817, now seen corresponding path program 1 times [2020-10-28 00:12:02,879 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 00:12:02,879 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1949572423] [2020-10-28 00:12:02,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 00:12:02,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:12:02,914 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:12:02,941 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:12:03,025 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:12:03,118 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:12:03,496 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:12:04,060 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:12:07,818 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:12:07,818 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 90 [2020-10-28 00:12:07,818 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-28 00:12:07,818 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4917 [2020-10-28 00:12:07,819 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:12:07,819 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 00:12:07,819 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 55 [2020-10-28 00:12:07,819 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-10-28 00:12:07,819 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:12:08,108 WARN L193 SmtUtils]: Spent 251.00 ms on a formula simplification that was a NOOP. DAG size: 151 [2020-10-28 00:12:08,109 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 00:12:08,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:12:08,121 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:12:08,137 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:12:08,137 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 00:12:08,137 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 00:12:08,139 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 19 [2020-10-28 00:12:08,139 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:12:08,140 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 00:12:08,140 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 00:12:08,140 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 00:12:08,141 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 00:12:08,173 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 00:12:08,174 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1949572423] [2020-10-28 00:12:08,175 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 00:12:08,175 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 00:12:08,175 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [277545096] [2020-10-28 00:12:08,175 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 00:12:08,175 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 00:12:08,176 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 00:12:08,176 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 00:12:08,176 INFO L87 Difference]: Start difference. First operand 28498 states and 40499 transitions. Second operand 4 states. [2020-10-28 00:12:08,535 WARN L193 SmtUtils]: Spent 312.00 ms on a formula simplification that was a NOOP. DAG size: 155 [2020-10-28 00:12:10,899 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 00:12:10,899 INFO L93 Difference]: Finished difference Result 45824 states and 64747 transitions. [2020-10-28 00:12:10,900 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 00:12:10,900 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 82 [2020-10-28 00:12:10,900 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 00:12:10,943 INFO L225 Difference]: With dead ends: 45824 [2020-10-28 00:12:10,943 INFO L226 Difference]: Without dead ends: 30050 [2020-10-28 00:12:10,971 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-28 00:12:11,000 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30050 states. [2020-10-28 00:12:12,906 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30050 to 28863. [2020-10-28 00:12:12,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28863 states. [2020-10-28 00:12:12,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28863 states to 28863 states and 40238 transitions. [2020-10-28 00:12:12,949 INFO L78 Accepts]: Start accepts. Automaton has 28863 states and 40238 transitions. Word has length 82 [2020-10-28 00:12:12,949 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 00:12:12,949 INFO L481 AbstractCegarLoop]: Abstraction has 28863 states and 40238 transitions. [2020-10-28 00:12:12,949 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 00:12:12,949 INFO L276 IsEmpty]: Start isEmpty. Operand 28863 states and 40238 transitions. [2020-10-28 00:12:12,959 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2020-10-28 00:12:12,959 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 00:12:12,959 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 00:12:12,959 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-28 00:12:12,960 INFO L429 AbstractCegarLoop]: === Iteration 14 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 00:12:12,960 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 00:12:12,960 INFO L82 PathProgramCache]: Analyzing trace with hash 1587416718, now seen corresponding path program 1 times [2020-10-28 00:12:12,960 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 00:12:12,960 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [424773599] [2020-10-28 00:12:12,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 00:12:12,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:12:12,999 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:12:13,031 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:12:13,122 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:12:13,210 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:12:13,503 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:12:14,559 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:12:14,559 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 90 [2020-10-28 00:12:14,560 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-28 00:12:14,560 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1575 [2020-10-28 00:12:14,560 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:12:14,560 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 00:12:14,560 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 36 [2020-10-28 00:12:14,560 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 38 [2020-10-28 00:12:14,560 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:12:14,804 WARN L193 SmtUtils]: Spent 197.00 ms on a formula simplification that was a NOOP. DAG size: 151 [2020-10-28 00:12:14,805 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 00:12:14,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:12:14,812 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:12:14,819 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:12:14,819 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 00:12:14,819 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 00:12:14,819 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-28 00:12:14,819 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:12:14,820 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 00:12:14,820 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 00:12:14,820 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 00:12:14,820 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:12:14,838 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 00:12:14,838 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [424773599] [2020-10-28 00:12:14,839 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 00:12:14,839 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-28 00:12:14,839 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [699067966] [2020-10-28 00:12:14,839 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-28 00:12:14,840 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 00:12:14,840 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-28 00:12:14,840 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-28 00:12:14,840 INFO L87 Difference]: Start difference. First operand 28863 states and 40238 transitions. Second operand 6 states. [2020-10-28 00:12:16,278 WARN L193 SmtUtils]: Spent 201.00 ms on a formula simplification that was a NOOP. DAG size: 153 [2020-10-28 00:12:16,670 WARN L193 SmtUtils]: Spent 211.00 ms on a formula simplification that was a NOOP. DAG size: 152 [2020-10-28 00:12:21,183 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 00:12:21,183 INFO L93 Difference]: Finished difference Result 102694 states and 143127 transitions. [2020-10-28 00:12:21,183 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-28 00:12:21,183 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 82 [2020-10-28 00:12:21,184 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 00:12:21,312 INFO L225 Difference]: With dead ends: 102694 [2020-10-28 00:12:21,312 INFO L226 Difference]: Without dead ends: 73887 [2020-10-28 00:12:21,355 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2020-10-28 00:12:21,419 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73887 states. [2020-10-28 00:12:24,383 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73887 to 38394. [2020-10-28 00:12:24,384 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38394 states. [2020-10-28 00:12:24,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38394 states to 38394 states and 52700 transitions. [2020-10-28 00:12:24,437 INFO L78 Accepts]: Start accepts. Automaton has 38394 states and 52700 transitions. Word has length 82 [2020-10-28 00:12:24,437 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 00:12:24,437 INFO L481 AbstractCegarLoop]: Abstraction has 38394 states and 52700 transitions. [2020-10-28 00:12:24,437 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-28 00:12:24,437 INFO L276 IsEmpty]: Start isEmpty. Operand 38394 states and 52700 transitions. [2020-10-28 00:12:24,447 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2020-10-28 00:12:24,448 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 00:12:24,448 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 00:12:24,448 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-28 00:12:24,448 INFO L429 AbstractCegarLoop]: === Iteration 15 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 00:12:24,449 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 00:12:24,449 INFO L82 PathProgramCache]: Analyzing trace with hash 1337246007, now seen corresponding path program 1 times [2020-10-28 00:12:24,449 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 00:12:24,449 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1202841590] [2020-10-28 00:12:24,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 00:12:24,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:12:24,487 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:12:24,522 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:12:24,587 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:12:24,661 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:12:25,004 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:12:26,894 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:12:26,894 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 90 [2020-10-28 00:12:26,894 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-28 00:12:26,894 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2421 [2020-10-28 00:12:26,895 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:12:26,895 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 00:12:26,895 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 36 [2020-10-28 00:12:26,895 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 42 [2020-10-28 00:12:26,895 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:12:27,170 WARN L193 SmtUtils]: Spent 225.00 ms on a formula simplification that was a NOOP. DAG size: 151 [2020-10-28 00:12:27,172 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 00:12:27,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:12:27,179 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:12:27,184 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:12:27,185 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 00:12:27,185 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 00:12:27,185 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-28 00:12:27,185 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:12:27,185 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 00:12:27,185 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 00:12:27,185 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 00:12:27,185 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:12:27,201 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 00:12:27,201 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1202841590] [2020-10-28 00:12:27,201 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 00:12:27,201 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-28 00:12:27,202 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [680099485] [2020-10-28 00:12:27,202 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-28 00:12:27,202 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 00:12:27,202 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-28 00:12:27,203 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-28 00:12:27,203 INFO L87 Difference]: Start difference. First operand 38394 states and 52700 transitions. Second operand 6 states. [2020-10-28 00:12:28,804 WARN L193 SmtUtils]: Spent 213.00 ms on a formula simplification that was a NOOP. DAG size: 153 [2020-10-28 00:12:29,271 WARN L193 SmtUtils]: Spent 206.00 ms on a formula simplification that was a NOOP. DAG size: 152 [2020-10-28 00:12:34,615 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 00:12:34,616 INFO L93 Difference]: Finished difference Result 121878 states and 166443 transitions. [2020-10-28 00:12:34,616 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-28 00:12:34,616 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 82 [2020-10-28 00:12:34,616 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 00:12:34,718 INFO L225 Difference]: With dead ends: 121878 [2020-10-28 00:12:34,719 INFO L226 Difference]: Without dead ends: 83592 [2020-10-28 00:12:34,767 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2020-10-28 00:12:34,839 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83592 states. [2020-10-28 00:12:39,032 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83592 to 47875. [2020-10-28 00:12:39,032 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47875 states. [2020-10-28 00:12:39,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47875 states to 47875 states and 64905 transitions. [2020-10-28 00:12:39,097 INFO L78 Accepts]: Start accepts. Automaton has 47875 states and 64905 transitions. Word has length 82 [2020-10-28 00:12:39,097 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 00:12:39,097 INFO L481 AbstractCegarLoop]: Abstraction has 47875 states and 64905 transitions. [2020-10-28 00:12:39,098 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-28 00:12:39,098 INFO L276 IsEmpty]: Start isEmpty. Operand 47875 states and 64905 transitions. [2020-10-28 00:12:39,108 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2020-10-28 00:12:39,109 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 00:12:39,109 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 00:12:39,109 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-28 00:12:39,109 INFO L429 AbstractCegarLoop]: === Iteration 16 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 00:12:39,110 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 00:12:39,110 INFO L82 PathProgramCache]: Analyzing trace with hash -2110573403, now seen corresponding path program 1 times [2020-10-28 00:12:39,110 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 00:12:39,110 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1881502018] [2020-10-28 00:12:39,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 00:12:39,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:12:39,146 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:12:39,348 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:12:39,371 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:12:39,503 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:12:39,933 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:12:40,881 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:12:40,881 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 91 [2020-10-28 00:12:40,881 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-28 00:12:40,881 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1749 [2020-10-28 00:12:40,881 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:12:40,881 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 00:12:40,882 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 36 [2020-10-28 00:12:40,882 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 31 [2020-10-28 00:12:40,882 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:12:41,122 WARN L193 SmtUtils]: Spent 202.00 ms on a formula simplification that was a NOOP. DAG size: 151 [2020-10-28 00:12:41,123 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 00:12:41,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:12:41,131 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:12:41,136 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:12:41,137 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 00:12:41,137 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 00:12:41,137 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-28 00:12:41,137 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:12:41,137 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 00:12:41,137 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 00:12:41,137 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 00:12:41,137 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:12:41,149 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 10 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 00:12:41,149 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1881502018] [2020-10-28 00:12:41,150 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 00:12:41,150 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-28 00:12:41,150 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1606479624] [2020-10-28 00:12:41,150 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-28 00:12:41,150 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 00:12:41,151 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-28 00:12:41,151 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-28 00:12:41,151 INFO L87 Difference]: Start difference. First operand 47875 states and 64905 transitions. Second operand 6 states. [2020-10-28 00:12:42,827 WARN L193 SmtUtils]: Spent 213.00 ms on a formula simplification that was a NOOP. DAG size: 153 [2020-10-28 00:12:43,339 WARN L193 SmtUtils]: Spent 208.00 ms on a formula simplification that was a NOOP. DAG size: 152 [2020-10-28 00:12:48,691 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 00:12:48,692 INFO L93 Difference]: Finished difference Result 121297 states and 163364 transitions. [2020-10-28 00:12:48,693 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-28 00:12:48,693 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 83 [2020-10-28 00:12:48,693 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 00:12:48,931 INFO L225 Difference]: With dead ends: 121297 [2020-10-28 00:12:48,931 INFO L226 Difference]: Without dead ends: 73583 [2020-10-28 00:12:48,967 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2020-10-28 00:12:49,009 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73583 states. [2020-10-28 00:12:53,143 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73583 to 49026. [2020-10-28 00:12:53,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49026 states. [2020-10-28 00:12:53,208 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49026 states to 49026 states and 65276 transitions. [2020-10-28 00:12:53,208 INFO L78 Accepts]: Start accepts. Automaton has 49026 states and 65276 transitions. Word has length 83 [2020-10-28 00:12:53,208 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 00:12:53,208 INFO L481 AbstractCegarLoop]: Abstraction has 49026 states and 65276 transitions. [2020-10-28 00:12:53,208 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-28 00:12:53,208 INFO L276 IsEmpty]: Start isEmpty. Operand 49026 states and 65276 transitions. [2020-10-28 00:12:53,218 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2020-10-28 00:12:53,218 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 00:12:53,218 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 00:12:53,218 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-28 00:12:53,219 INFO L429 AbstractCegarLoop]: === Iteration 17 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 00:12:53,219 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 00:12:53,219 INFO L82 PathProgramCache]: Analyzing trace with hash 234473488, now seen corresponding path program 1 times [2020-10-28 00:12:53,219 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 00:12:53,219 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1716890750] [2020-10-28 00:12:53,219 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 00:12:53,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:12:53,251 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:12:53,274 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:12:53,290 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:12:53,543 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:12:54,024 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:12:54,045 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:12:54,112 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:12:55,565 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:12:58,240 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:12:58,241 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 91 [2020-10-28 00:12:58,241 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-28 00:12:58,241 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-28 00:12:58,241 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:12:58,241 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 00:12:58,241 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 46 [2020-10-28 00:12:58,241 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-28 00:12:58,241 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:12:58,468 WARN L193 SmtUtils]: Spent 199.00 ms on a formula simplification that was a NOOP. DAG size: 151 [2020-10-28 00:12:58,469 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 00:12:58,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:12:58,477 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:12:58,481 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:12:58,482 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 00:12:58,482 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 00:12:58,482 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-28 00:12:58,482 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:12:58,482 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 00:12:58,482 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 00:12:58,482 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 00:12:58,482 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:12:58,495 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 00:12:58,495 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1716890750] [2020-10-28 00:12:58,496 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 00:12:58,496 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 00:12:58,496 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1414055222] [2020-10-28 00:12:58,496 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 00:12:58,496 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 00:12:58,497 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 00:12:58,497 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 00:12:58,497 INFO L87 Difference]: Start difference. First operand 49026 states and 65276 transitions. Second operand 4 states. [2020-10-28 00:12:58,742 WARN L193 SmtUtils]: Spent 212.00 ms on a formula simplification that was a NOOP. DAG size: 155 [2020-10-28 00:13:05,306 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 00:13:05,306 INFO L93 Difference]: Finished difference Result 113261 states and 150480 transitions. [2020-10-28 00:13:05,307 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 00:13:05,307 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 83 [2020-10-28 00:13:05,307 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 00:13:05,386 INFO L225 Difference]: With dead ends: 113261 [2020-10-28 00:13:05,386 INFO L226 Difference]: Without dead ends: 69799 [2020-10-28 00:13:05,419 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-28 00:13:05,461 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69799 states. [2020-10-28 00:13:11,487 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69799 to 69373. [2020-10-28 00:13:11,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69373 states. [2020-10-28 00:13:11,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69373 states to 69373 states and 91072 transitions. [2020-10-28 00:13:11,581 INFO L78 Accepts]: Start accepts. Automaton has 69373 states and 91072 transitions. Word has length 83 [2020-10-28 00:13:11,581 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 00:13:11,581 INFO L481 AbstractCegarLoop]: Abstraction has 69373 states and 91072 transitions. [2020-10-28 00:13:11,581 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 00:13:11,581 INFO L276 IsEmpty]: Start isEmpty. Operand 69373 states and 91072 transitions. [2020-10-28 00:13:11,595 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2020-10-28 00:13:11,595 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 00:13:11,595 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 00:13:11,595 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-28 00:13:11,595 INFO L429 AbstractCegarLoop]: === Iteration 18 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 00:13:11,596 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 00:13:11,596 INFO L82 PathProgramCache]: Analyzing trace with hash -542462185, now seen corresponding path program 1 times [2020-10-28 00:13:11,596 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 00:13:11,596 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1369822185] [2020-10-28 00:13:11,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 00:13:11,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:13:11,630 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:13:11,652 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:13:11,711 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:13:11,748 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:13:11,804 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:13:12,066 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:13:12,538 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:13:12,648 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:13:12,934 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:13:12,996 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:13:13,876 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:13:14,045 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:13:16,624 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:13:16,624 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 92 [2020-10-28 00:13:16,624 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 12 [2020-10-28 00:13:16,624 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5006 [2020-10-28 00:13:16,624 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:13:16,624 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-28 00:13:16,625 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 36 [2020-10-28 00:13:16,625 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 47 [2020-10-28 00:13:16,625 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:13:17,102 WARN L193 SmtUtils]: Spent 177.00 ms on a formula simplification that was a NOOP. DAG size: 151 [2020-10-28 00:13:17,103 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 00:13:17,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:13:17,111 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:13:17,118 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:13:17,118 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 00:13:17,118 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 00:13:17,119 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-28 00:13:17,119 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:13:17,119 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 00:13:17,119 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 00:13:17,119 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 00:13:17,119 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:13:17,142 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 00:13:17,142 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1369822185] [2020-10-28 00:13:17,143 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 00:13:17,143 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-28 00:13:17,143 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1341193975] [2020-10-28 00:13:17,143 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-28 00:13:17,143 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 00:13:17,144 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-28 00:13:17,144 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2020-10-28 00:13:17,144 INFO L87 Difference]: Start difference. First operand 69373 states and 91072 transitions. Second operand 11 states. [2020-10-28 00:13:17,427 WARN L193 SmtUtils]: Spent 207.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-28 00:13:23,903 WARN L193 SmtUtils]: Spent 346.00 ms on a formula simplification that was a NOOP. DAG size: 156 [2020-10-28 00:13:24,983 WARN L193 SmtUtils]: Spent 208.00 ms on a formula simplification that was a NOOP. DAG size: 152 [2020-10-28 00:13:52,513 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 00:13:52,513 INFO L93 Difference]: Finished difference Result 318928 states and 413204 transitions. [2020-10-28 00:13:52,514 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2020-10-28 00:13:52,514 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 84 [2020-10-28 00:13:52,514 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 00:13:53,165 INFO L225 Difference]: With dead ends: 318928 [2020-10-28 00:13:53,166 INFO L226 Difference]: Without dead ends: 256479 [2020-10-28 00:13:53,260 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1203 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=721, Invalid=3061, Unknown=0, NotChecked=0, Total=3782 [2020-10-28 00:13:53,442 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 256479 states. [2020-10-28 00:14:04,312 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 256479 to 80349. [2020-10-28 00:14:04,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80349 states. [2020-10-28 00:14:04,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80349 states to 80349 states and 105723 transitions. [2020-10-28 00:14:04,437 INFO L78 Accepts]: Start accepts. Automaton has 80349 states and 105723 transitions. Word has length 84 [2020-10-28 00:14:04,438 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 00:14:04,438 INFO L481 AbstractCegarLoop]: Abstraction has 80349 states and 105723 transitions. [2020-10-28 00:14:04,438 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-28 00:14:04,438 INFO L276 IsEmpty]: Start isEmpty. Operand 80349 states and 105723 transitions. [2020-10-28 00:14:04,453 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2020-10-28 00:14:04,453 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 00:14:04,454 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 00:14:04,454 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-28 00:14:04,454 INFO L429 AbstractCegarLoop]: === Iteration 19 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 00:14:04,454 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 00:14:04,454 INFO L82 PathProgramCache]: Analyzing trace with hash -1617794564, now seen corresponding path program 1 times [2020-10-28 00:14:04,455 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 00:14:04,455 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [126381049] [2020-10-28 00:14:04,455 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 00:14:04,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:14:04,494 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:14:04,536 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:14:04,664 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:14:04,825 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:14:05,457 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:14:05,906 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:14:06,629 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:14:09,498 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:14:09,499 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 92 [2020-10-28 00:14:09,499 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-28 00:14:09,499 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5021 [2020-10-28 00:14:09,499 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:14:09,499 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 00:14:09,499 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 24 [2020-10-28 00:14:09,499 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 55 [2020-10-28 00:14:09,499 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:14:09,762 WARN L193 SmtUtils]: Spent 193.00 ms on a formula simplification that was a NOOP. DAG size: 151 [2020-10-28 00:14:09,762 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 00:14:09,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:14:09,768 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:14:09,773 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:14:09,773 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 00:14:09,773 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 00:14:09,773 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-28 00:14:09,773 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:14:09,773 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 00:14:09,773 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 00:14:09,773 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 00:14:09,773 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:14:09,784 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 00:14:09,784 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [126381049] [2020-10-28 00:14:09,784 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 00:14:09,784 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-28 00:14:09,784 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1757388851] [2020-10-28 00:14:09,785 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-28 00:14:09,785 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 00:14:09,786 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-28 00:14:09,786 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-28 00:14:09,786 INFO L87 Difference]: Start difference. First operand 80349 states and 105723 transitions. Second operand 6 states. [2020-10-28 00:14:10,036 WARN L193 SmtUtils]: Spent 208.00 ms on a formula simplification that was a NOOP. DAG size: 152 [2020-10-28 00:14:10,962 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification that was a NOOP. DAG size: 9 [2020-10-28 00:14:13,238 WARN L193 SmtUtils]: Spent 216.00 ms on a formula simplification that was a NOOP. DAG size: 153 [2020-10-28 00:14:14,098 WARN L193 SmtUtils]: Spent 208.00 ms on a formula simplification that was a NOOP. DAG size: 152