/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=SMALLESTAMONGWIDE --traceabstraction.additional.smt.options tolerance=0.3 --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.3.1.ufo.BOUNDED-6.pals.c.v+nlh-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-29 13:36:08,524 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-29 13:36:08,526 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-29 13:36:08,565 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-29 13:36:08,566 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-29 13:36:08,567 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-29 13:36:08,569 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-29 13:36:08,572 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-29 13:36:08,574 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-29 13:36:08,575 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-29 13:36:08,576 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-29 13:36:08,577 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-29 13:36:08,578 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-29 13:36:08,579 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-29 13:36:08,581 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-29 13:36:08,582 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-29 13:36:08,583 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-29 13:36:08,584 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-29 13:36:08,586 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-29 13:36:08,599 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-29 13:36:08,600 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-29 13:36:08,602 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-29 13:36:08,603 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-29 13:36:08,608 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-29 13:36:08,615 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-29 13:36:08,616 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-29 13:36:08,618 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-29 13:36:08,620 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-29 13:36:08,620 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-29 13:36:08,622 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-29 13:36:08,622 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-29 13:36:08,625 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-29 13:36:08,627 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-29 13:36:08,628 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-29 13:36:08,630 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-29 13:36:08,630 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-29 13:36:08,631 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-29 13:36:08,632 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-29 13:36:08,632 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-29 13:36:08,633 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-29 13:36:08,634 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-29 13:36:08,635 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 [2020-10-29 13:36:08,692 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-29 13:36:08,692 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-29 13:36:08,696 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-29 13:36:08,696 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-29 13:36:08,697 INFO L138 SettingsManager]: * Use SBE=true [2020-10-29 13:36:08,697 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-29 13:36:08,697 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-29 13:36:08,698 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-29 13:36:08,698 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-29 13:36:08,698 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-29 13:36:08,699 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-29 13:36:08,699 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-29 13:36:08,699 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-29 13:36:08,700 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-29 13:36:08,700 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-29 13:36:08,700 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-29 13:36:08,700 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-29 13:36:08,700 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-29 13:36:08,701 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-29 13:36:08,701 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-29 13:36:08,701 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-29 13:36:08,701 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-29 13:36:08,702 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-29 13:36:08,702 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-29 13:36:08,702 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-29 13:36:08,702 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-29 13:36:08,702 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-29 13:36:08,702 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-29 13:36:08,703 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-29 13:36:08,703 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.3;log-additional-information=true;unknown-allowed=true; [2020-10-29 13:36:09,062 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-29 13:36:09,090 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-29 13:36:09,093 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-29 13:36:09,094 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-29 13:36:09,095 INFO L275 PluginConnector]: CDTParser initialized [2020-10-29 13:36:09,096 INFO L432 ainManager$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.3.1.ufo.BOUNDED-6.pals.c.v+nlh-reducer.c [2020-10-29 13:36:09,175 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/dd24b9629/679cf9da596f44db9c1650dac314b8ce/FLAG1358ca1e6 [2020-10-29 13:36:09,777 INFO L306 CDTParser]: Found 1 translation units. [2020-10-29 13:36:09,778 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/seq-mthreaded-reduced/pals_lcr-var-start-time.3.1.ufo.BOUNDED-6.pals.c.v+nlh-reducer.c [2020-10-29 13:36:09,790 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/dd24b9629/679cf9da596f44db9c1650dac314b8ce/FLAG1358ca1e6 [2020-10-29 13:36:10,103 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/dd24b9629/679cf9da596f44db9c1650dac314b8ce [2020-10-29 13:36:10,106 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-29 13:36:10,117 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-29 13:36:10,118 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-29 13:36:10,119 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-29 13:36:10,122 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-29 13:36:10,123 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.10 01:36:10" (1/1) ... [2020-10-29 13:36:10,127 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1313517f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 01:36:10, skipping insertion in model container [2020-10-29 13:36:10,127 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.10 01:36:10" (1/1) ... [2020-10-29 13:36:10,135 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-29 13:36:10,180 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-29 13:36:10,548 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-29 13:36:10,578 INFO L203 MainTranslator]: Completed pre-run [2020-10-29 13:36:10,747 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-29 13:36:10,781 INFO L208 MainTranslator]: Completed translation [2020-10-29 13:36:10,783 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 01:36:10 WrapperNode [2020-10-29 13:36:10,783 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-29 13:36:10,785 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-29 13:36:10,785 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-29 13:36:10,785 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-29 13:36:10,800 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 01:36:10" (1/1) ... [2020-10-29 13:36:10,802 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 01:36:10" (1/1) ... [2020-10-29 13:36:10,818 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 01:36:10" (1/1) ... [2020-10-29 13:36:10,818 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 01:36:10" (1/1) ... [2020-10-29 13:36:10,836 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 01:36:10" (1/1) ... [2020-10-29 13:36:10,847 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 01:36:10" (1/1) ... [2020-10-29 13:36:10,851 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 01:36:10" (1/1) ... [2020-10-29 13:36:10,855 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-29 13:36:10,856 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-29 13:36:10,856 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-29 13:36:10,857 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-29 13:36:10,858 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 01:36:10" (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 [2020-10-29 13:36:10,943 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-29 13:36:10,944 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-29 13:36:10,944 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-29 13:36:10,944 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-10-29 13:36:10,944 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-29 13:36:10,944 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-29 13:36:10,945 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-29 13:36:10,945 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-29 13:36:10,945 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-29 13:36:10,945 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-10-29 13:36:10,945 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-10-29 13:36:10,946 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2020-10-29 13:36:10,946 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-10-29 13:36:10,946 INFO L130 BoogieDeclarations]: Found specification of procedure read [2020-10-29 13:36:10,946 INFO L130 BoogieDeclarations]: Found specification of procedure write [2020-10-29 13:36:10,946 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2020-10-29 13:36:10,946 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2020-10-29 13:36:10,947 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2020-10-29 13:36:10,947 INFO L130 BoogieDeclarations]: Found specification of procedure init [2020-10-29 13:36:10,947 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-10-29 13:36:10,947 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-29 13:36:10,947 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-29 13:36:10,948 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-29 13:36:10,948 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-29 13:36:10,948 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-29 13:36:10,948 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-29 13:36:10,948 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-29 13:36:12,023 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-29 13:36:12,023 INFO L298 CfgBuilder]: Removed 0 assume(true) statements. [2020-10-29 13:36:12,025 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.10 01:36:12 BoogieIcfgContainer [2020-10-29 13:36:12,025 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-29 13:36:12,027 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-29 13:36:12,027 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-29 13:36:12,031 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-29 13:36:12,031 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 29.10 01:36:10" (1/3) ... [2020-10-29 13:36:12,032 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@736c783b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.10 01:36:12, skipping insertion in model container [2020-10-29 13:36:12,032 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 01:36:10" (2/3) ... [2020-10-29 13:36:12,033 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@736c783b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.10 01:36:12, skipping insertion in model container [2020-10-29 13:36:12,033 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.10 01:36:12" (3/3) ... [2020-10-29 13:36:12,034 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_lcr-var-start-time.3.1.ufo.BOUNDED-6.pals.c.v+nlh-reducer.c [2020-10-29 13:36:12,046 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-29 13:36:12,051 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-29 13:36:12,064 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-29 13:36:12,093 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-29 13:36:12,093 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-29 13:36:12,093 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-29 13:36:12,094 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-29 13:36:12,094 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-29 13:36:12,094 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-29 13:36:12,094 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-29 13:36:12,094 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-29 13:36:12,121 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states. [2020-10-29 13:36:12,131 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-10-29 13:36:12,131 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:36:12,132 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] [2020-10-29 13:36:12,133 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:36:12,139 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:36:12,139 INFO L82 PathProgramCache]: Analyzing trace with hash -1411810681, now seen corresponding path program 1 times [2020-10-29 13:36:12,148 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:36:12,149 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [896312514] [2020-10-29 13:36:12,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:36:12,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:36:12,588 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:36:12,790 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:36:13,148 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:36:14,413 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:36:14,413 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 63 [2020-10-29 13:36:14,414 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-29 13:36:14,414 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1964 [2020-10-29 13:36:14,416 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:36:14,417 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:36:14,417 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-29 13:36:14,417 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-29 13:36:14,417 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 42 [2020-10-29 13:36:14,418 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-29 13:36:14,914 WARN L193 SmtUtils]: Spent 365.00 ms on a formula simplification that was a NOOP. DAG size: 142 [2020-10-29 13:36:14,917 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:36:14,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:36:14,932 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:36:14,955 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:36:14,955 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:36:14,956 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:36:14,956 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 27 [2020-10-29 13:36:14,956 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:36:14,956 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:36:14,956 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 13:36:14,957 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:36:14,957 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 13:36:14,957 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:36:14,993 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 13:36:14,994 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [896312514] [2020-10-29 13:36:14,996 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:36:14,997 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-29 13:36:14,997 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2058970954] [2020-10-29 13:36:15,002 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-29 13:36:15,003 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:36:15,016 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-29 13:36:15,017 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-29 13:36:15,019 INFO L87 Difference]: Start difference. First operand 171 states. Second operand 6 states. [2020-10-29 13:36:15,499 WARN L193 SmtUtils]: Spent 381.00 ms on a formula simplification that was a NOOP. DAG size: 148 [2020-10-29 13:36:16,580 WARN L193 SmtUtils]: Spent 379.00 ms on a formula simplification that was a NOOP. DAG size: 144 [2020-10-29 13:36:17,016 WARN L193 SmtUtils]: Spent 393.00 ms on a formula simplification that was a NOOP. DAG size: 146 [2020-10-29 13:36:17,914 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:36:17,915 INFO L93 Difference]: Finished difference Result 534 states and 857 transitions. [2020-10-29 13:36:17,916 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-29 13:36:17,917 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 55 [2020-10-29 13:36:17,917 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:36:17,934 INFO L225 Difference]: With dead ends: 534 [2020-10-29 13:36:17,934 INFO L226 Difference]: Without dead ends: 446 [2020-10-29 13:36:17,938 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2020-10-29 13:36:17,957 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 446 states. [2020-10-29 13:36:18,009 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 446 to 261. [2020-10-29 13:36:18,010 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 261 states. [2020-10-29 13:36:18,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 261 states to 261 states and 387 transitions. [2020-10-29 13:36:18,014 INFO L78 Accepts]: Start accepts. Automaton has 261 states and 387 transitions. Word has length 55 [2020-10-29 13:36:18,015 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:36:18,015 INFO L481 AbstractCegarLoop]: Abstraction has 261 states and 387 transitions. [2020-10-29 13:36:18,015 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-29 13:36:18,015 INFO L276 IsEmpty]: Start isEmpty. Operand 261 states and 387 transitions. [2020-10-29 13:36:18,018 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-10-29 13:36:18,018 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:36:18,018 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] [2020-10-29 13:36:18,018 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-29 13:36:18,018 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:36:18,019 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:36:18,019 INFO L82 PathProgramCache]: Analyzing trace with hash -1521986906, now seen corresponding path program 1 times [2020-10-29 13:36:18,020 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:36:18,020 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [353349726] [2020-10-29 13:36:18,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:36:18,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:36:18,085 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:36:18,125 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:36:18,170 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:36:18,392 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:36:19,180 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:36:23,081 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:36:23,081 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 66 [2020-10-29 13:36:23,081 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-29 13:36:23,081 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5016 [2020-10-29 13:36:23,083 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:36:23,083 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:36:23,083 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-29 13:36:23,084 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-29 13:36:23,090 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 45 [2020-10-29 13:36:23,090 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 6 [2020-10-29 13:36:23,495 WARN L193 SmtUtils]: Spent 310.00 ms on a formula simplification that was a NOOP. DAG size: 142 [2020-10-29 13:36:23,496 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:36:23,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:36:23,504 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:36:23,514 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:36:23,514 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:36:23,515 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:36:23,515 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-10-29 13:36:23,515 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:36:23,515 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:36:23,515 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 13:36:23,516 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:36:23,516 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 13:36:23,516 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:36:23,533 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 13:36:23,534 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [353349726] [2020-10-29 13:36:23,534 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:36:23,534 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-29 13:36:23,535 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [784998247] [2020-10-29 13:36:23,536 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-29 13:36:23,536 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:36:23,537 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-29 13:36:23,538 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-29 13:36:23,538 INFO L87 Difference]: Start difference. First operand 261 states and 387 transitions. Second operand 6 states. [2020-10-29 13:36:23,974 WARN L193 SmtUtils]: Spent 373.00 ms on a formula simplification that was a NOOP. DAG size: 149 [2020-10-29 13:36:24,833 WARN L193 SmtUtils]: Spent 324.00 ms on a formula simplification that was a NOOP. DAG size: 144 [2020-10-29 13:36:25,820 WARN L193 SmtUtils]: Spent 397.00 ms on a formula simplification that was a NOOP. DAG size: 147 [2020-10-29 13:36:26,224 WARN L193 SmtUtils]: Spent 376.00 ms on a formula simplification that was a NOOP. DAG size: 145 [2020-10-29 13:36:26,336 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:36:26,337 INFO L93 Difference]: Finished difference Result 636 states and 966 transitions. [2020-10-29 13:36:26,338 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-29 13:36:26,338 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 58 [2020-10-29 13:36:26,338 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:36:26,346 INFO L225 Difference]: With dead ends: 636 [2020-10-29 13:36:26,346 INFO L226 Difference]: Without dead ends: 571 [2020-10-29 13:36:26,349 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=52, Invalid=104, Unknown=0, NotChecked=0, Total=156 [2020-10-29 13:36:26,352 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 571 states. [2020-10-29 13:36:26,423 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 571 to 414. [2020-10-29 13:36:26,423 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 414 states. [2020-10-29 13:36:26,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 414 states to 414 states and 625 transitions. [2020-10-29 13:36:26,428 INFO L78 Accepts]: Start accepts. Automaton has 414 states and 625 transitions. Word has length 58 [2020-10-29 13:36:26,428 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:36:26,428 INFO L481 AbstractCegarLoop]: Abstraction has 414 states and 625 transitions. [2020-10-29 13:36:26,428 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-29 13:36:26,428 INFO L276 IsEmpty]: Start isEmpty. Operand 414 states and 625 transitions. [2020-10-29 13:36:26,435 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-10-29 13:36:26,435 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:36:26,435 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] [2020-10-29 13:36:26,435 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-29 13:36:26,436 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:36:26,436 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:36:26,437 INFO L82 PathProgramCache]: Analyzing trace with hash 1260689956, now seen corresponding path program 1 times [2020-10-29 13:36:26,437 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:36:26,437 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1380150552] [2020-10-29 13:36:26,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:36:26,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:36:26,483 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:36:26,508 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:36:26,604 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:36:26,716 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:36:26,846 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:36:31,478 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:36:31,478 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 66 [2020-10-29 13:36:31,478 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-29 13:36:31,479 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5008 [2020-10-29 13:36:31,479 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:36:31,479 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:36:31,479 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-29 13:36:31,479 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-29 13:36:31,480 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 45 [2020-10-29 13:36:31,480 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:36:31,902 WARN L193 SmtUtils]: Spent 334.00 ms on a formula simplification that was a NOOP. DAG size: 142 [2020-10-29 13:36:31,903 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:36:31,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:36:31,911 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:36:31,924 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:36:31,925 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:36:31,925 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:36:31,925 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 15 [2020-10-29 13:36:31,925 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:36:31,925 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:36:31,926 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 13:36:31,926 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:36:31,926 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 13:36:31,926 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:36:31,941 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 13:36:31,942 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1380150552] [2020-10-29 13:36:31,942 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:36:31,942 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-29 13:36:31,942 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1230524906] [2020-10-29 13:36:31,943 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-29 13:36:31,943 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:36:31,944 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-29 13:36:31,944 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-29 13:36:31,944 INFO L87 Difference]: Start difference. First operand 414 states and 625 transitions. Second operand 6 states. [2020-10-29 13:36:32,384 WARN L193 SmtUtils]: Spent 371.00 ms on a formula simplification that was a NOOP. DAG size: 149 [2020-10-29 13:36:33,355 WARN L193 SmtUtils]: Spent 350.00 ms on a formula simplification that was a NOOP. DAG size: 144 [2020-10-29 13:36:34,272 WARN L193 SmtUtils]: Spent 354.00 ms on a formula simplification that was a NOOP. DAG size: 147 [2020-10-29 13:36:34,629 WARN L193 SmtUtils]: Spent 340.00 ms on a formula simplification that was a NOOP. DAG size: 145 [2020-10-29 13:36:34,726 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:36:34,726 INFO L93 Difference]: Finished difference Result 805 states and 1225 transitions. [2020-10-29 13:36:34,727 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-29 13:36:34,727 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 58 [2020-10-29 13:36:34,727 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:36:34,731 INFO L225 Difference]: With dead ends: 805 [2020-10-29 13:36:34,732 INFO L226 Difference]: Without dead ends: 680 [2020-10-29 13:36:34,733 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=52, Invalid=104, Unknown=0, NotChecked=0, Total=156 [2020-10-29 13:36:34,734 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 680 states. [2020-10-29 13:36:34,764 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 680 to 499. [2020-10-29 13:36:34,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 499 states. [2020-10-29 13:36:34,767 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 499 states to 499 states and 757 transitions. [2020-10-29 13:36:34,767 INFO L78 Accepts]: Start accepts. Automaton has 499 states and 757 transitions. Word has length 58 [2020-10-29 13:36:34,768 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:36:34,768 INFO L481 AbstractCegarLoop]: Abstraction has 499 states and 757 transitions. [2020-10-29 13:36:34,768 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-29 13:36:34,768 INFO L276 IsEmpty]: Start isEmpty. Operand 499 states and 757 transitions. [2020-10-29 13:36:34,770 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-10-29 13:36:34,770 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:36:34,772 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] [2020-10-29 13:36:34,772 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-29 13:36:34,773 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:36:34,773 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:36:34,773 INFO L82 PathProgramCache]: Analyzing trace with hash 1777280484, now seen corresponding path program 1 times [2020-10-29 13:36:34,773 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:36:34,774 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [90027447] [2020-10-29 13:36:34,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:36:34,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:36:34,812 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:36:34,837 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:36:34,862 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:36:34,888 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:36:35,269 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:36:39,499 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:36:39,499 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 66 [2020-10-29 13:36:39,499 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-29 13:36:39,500 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4699 [2020-10-29 13:36:39,500 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:36:39,500 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:36:39,500 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-29 13:36:39,500 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-10-29 13:36:39,501 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 41 [2020-10-29 13:36:39,501 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:36:39,889 WARN L193 SmtUtils]: Spent 314.00 ms on a formula simplification that was a NOOP. DAG size: 142 [2020-10-29 13:36:39,891 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:36:39,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:36:39,898 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:36:39,906 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:36:39,907 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:36:39,907 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:36:39,907 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-29 13:36:39,907 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:36:39,908 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:36:39,908 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 13:36:39,908 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:36:39,908 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 13:36:39,908 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:36:39,923 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 13:36:39,923 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [90027447] [2020-10-29 13:36:39,923 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:36:39,924 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-29 13:36:39,924 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1715629181] [2020-10-29 13:36:39,924 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-29 13:36:39,925 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:36:39,925 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-29 13:36:39,925 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-29 13:36:39,926 INFO L87 Difference]: Start difference. First operand 499 states and 757 transitions. Second operand 6 states. [2020-10-29 13:36:40,355 WARN L193 SmtUtils]: Spent 360.00 ms on a formula simplification that was a NOOP. DAG size: 149 [2020-10-29 13:36:41,272 WARN L193 SmtUtils]: Spent 348.00 ms on a formula simplification that was a NOOP. DAG size: 144 [2020-10-29 13:36:42,193 WARN L193 SmtUtils]: Spent 325.00 ms on a formula simplification that was a NOOP. DAG size: 145 [2020-10-29 13:36:42,564 WARN L193 SmtUtils]: Spent 342.00 ms on a formula simplification that was a NOOP. DAG size: 147 [2020-10-29 13:36:42,683 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:36:42,684 INFO L93 Difference]: Finished difference Result 940 states and 1433 transitions. [2020-10-29 13:36:42,685 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-29 13:36:42,686 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 58 [2020-10-29 13:36:42,686 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:36:42,691 INFO L225 Difference]: With dead ends: 940 [2020-10-29 13:36:42,692 INFO L226 Difference]: Without dead ends: 815 [2020-10-29 13:36:42,696 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=52, Invalid=104, Unknown=0, NotChecked=0, Total=156 [2020-10-29 13:36:42,697 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 815 states. [2020-10-29 13:36:42,730 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 815 to 590. [2020-10-29 13:36:42,731 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 590 states. [2020-10-29 13:36:42,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 590 states to 590 states and 899 transitions. [2020-10-29 13:36:42,734 INFO L78 Accepts]: Start accepts. Automaton has 590 states and 899 transitions. Word has length 58 [2020-10-29 13:36:42,737 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:36:42,737 INFO L481 AbstractCegarLoop]: Abstraction has 590 states and 899 transitions. [2020-10-29 13:36:42,737 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-29 13:36:42,737 INFO L276 IsEmpty]: Start isEmpty. Operand 590 states and 899 transitions. [2020-10-29 13:36:42,747 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-10-29 13:36:42,747 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:36:42,747 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 13:36:42,747 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-29 13:36:42,748 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:36:42,748 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:36:42,748 INFO L82 PathProgramCache]: Analyzing trace with hash 355785125, now seen corresponding path program 1 times [2020-10-29 13:36:42,748 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:36:42,749 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [156214065] [2020-10-29 13:36:42,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:36:42,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:36:42,800 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:36:42,837 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:36:42,870 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:36:42,971 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:36:43,020 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:36:43,574 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:36:43,635 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:36:43,772 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:36:47,783 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:36:47,783 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 69 [2020-10-29 13:36:47,783 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-29 13:36:47,783 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-29 13:36:47,783 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:36:47,784 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:36:47,784 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-29 13:36:47,784 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-29 13:36:47,784 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 56 [2020-10-29 13:36:47,784 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:36:48,537 WARN L193 SmtUtils]: Spent 458.00 ms on a formula simplification that was a NOOP. DAG size: 142 [2020-10-29 13:36:48,539 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:36:48,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:36:48,553 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:36:48,570 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:36:48,570 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:36:48,570 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:36:48,571 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 20 [2020-10-29 13:36:48,571 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:36:48,571 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:36:48,571 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 13:36:48,571 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:36:48,572 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-29 13:36:48,572 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:36:48,602 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 13:36:48,603 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [156214065] [2020-10-29 13:36:48,603 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:36:48,603 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-29 13:36:48,604 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [306587196] [2020-10-29 13:36:48,605 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-29 13:36:48,605 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:36:48,606 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-29 13:36:48,606 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-10-29 13:36:48,606 INFO L87 Difference]: Start difference. First operand 590 states and 899 transitions. Second operand 8 states. [2020-10-29 13:36:48,985 WARN L193 SmtUtils]: Spent 322.00 ms on a formula simplification that was a NOOP. DAG size: 149 [2020-10-29 13:36:50,192 WARN L193 SmtUtils]: Spent 370.00 ms on a formula simplification that was a NOOP. DAG size: 153 [2020-10-29 13:36:51,230 WARN L193 SmtUtils]: Spent 338.00 ms on a formula simplification that was a NOOP. DAG size: 151 [2020-10-29 13:36:51,462 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:36:51,463 INFO L93 Difference]: Finished difference Result 2705 states and 4169 transitions. [2020-10-29 13:36:51,463 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-29 13:36:51,463 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 61 [2020-10-29 13:36:51,465 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:36:51,479 INFO L225 Difference]: With dead ends: 2705 [2020-10-29 13:36:51,479 INFO L226 Difference]: Without dead ends: 2203 [2020-10-29 13:36:51,483 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=91, Invalid=215, Unknown=0, NotChecked=0, Total=306 [2020-10-29 13:36:51,487 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2203 states. [2020-10-29 13:36:51,556 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2203 to 634. [2020-10-29 13:36:51,558 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 634 states. [2020-10-29 13:36:51,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 634 states to 634 states and 947 transitions. [2020-10-29 13:36:51,562 INFO L78 Accepts]: Start accepts. Automaton has 634 states and 947 transitions. Word has length 61 [2020-10-29 13:36:51,562 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:36:51,562 INFO L481 AbstractCegarLoop]: Abstraction has 634 states and 947 transitions. [2020-10-29 13:36:51,562 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-29 13:36:51,562 INFO L276 IsEmpty]: Start isEmpty. Operand 634 states and 947 transitions. [2020-10-29 13:36:51,564 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-10-29 13:36:51,565 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:36:51,565 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 13:36:51,565 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-29 13:36:51,565 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:36:51,566 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:36:51,566 INFO L82 PathProgramCache]: Analyzing trace with hash 16322089, now seen corresponding path program 1 times [2020-10-29 13:36:51,566 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:36:51,567 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1891533053] [2020-10-29 13:36:51,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:36:51,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:36:51,607 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:36:51,631 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:36:51,654 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:36:51,676 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:36:51,993 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:36:52,061 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:36:52,954 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:36:53,090 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:36:56,612 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:36:56,612 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 69 [2020-10-29 13:36:56,613 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-29 13:36:56,613 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5019 [2020-10-29 13:36:56,613 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:36:56,613 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:36:56,613 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-29 13:36:56,613 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-29 13:36:56,613 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 53 [2020-10-29 13:36:56,613 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:36:57,285 WARN L193 SmtUtils]: Spent 403.00 ms on a formula simplification that was a NOOP. DAG size: 142 [2020-10-29 13:36:57,286 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:36:57,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:36:57,299 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:36:57,310 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:36:57,311 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:36:57,311 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:36:57,311 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 15 [2020-10-29 13:36:57,311 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:36:57,311 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:36:57,311 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 13:36:57,312 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:36:57,312 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-29 13:36:57,312 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:36:57,340 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 13:36:57,341 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1891533053] [2020-10-29 13:36:57,342 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:36:57,342 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-29 13:36:57,343 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [257917234] [2020-10-29 13:36:57,343 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-29 13:36:57,343 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:36:57,344 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-29 13:36:57,344 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-10-29 13:36:57,345 INFO L87 Difference]: Start difference. First operand 634 states and 947 transitions. Second operand 8 states. [2020-10-29 13:36:57,735 WARN L193 SmtUtils]: Spent 335.00 ms on a formula simplification that was a NOOP. DAG size: 149 [2020-10-29 13:36:59,030 WARN L193 SmtUtils]: Spent 363.00 ms on a formula simplification that was a NOOP. DAG size: 153 [2020-10-29 13:37:00,033 WARN L193 SmtUtils]: Spent 336.00 ms on a formula simplification that was a NOOP. DAG size: 151 [2020-10-29 13:37:00,283 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:37:00,283 INFO L93 Difference]: Finished difference Result 3295 states and 4959 transitions. [2020-10-29 13:37:00,284 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-29 13:37:00,284 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 61 [2020-10-29 13:37:00,284 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:37:00,298 INFO L225 Difference]: With dead ends: 3295 [2020-10-29 13:37:00,298 INFO L226 Difference]: Without dead ends: 2757 [2020-10-29 13:37:00,300 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=91, Invalid=215, Unknown=0, NotChecked=0, Total=306 [2020-10-29 13:37:00,303 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2757 states. [2020-10-29 13:37:00,379 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2757 to 696. [2020-10-29 13:37:00,379 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 696 states. [2020-10-29 13:37:00,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 696 states to 696 states and 1007 transitions. [2020-10-29 13:37:00,383 INFO L78 Accepts]: Start accepts. Automaton has 696 states and 1007 transitions. Word has length 61 [2020-10-29 13:37:00,383 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:37:00,383 INFO L481 AbstractCegarLoop]: Abstraction has 696 states and 1007 transitions. [2020-10-29 13:37:00,383 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-29 13:37:00,383 INFO L276 IsEmpty]: Start isEmpty. Operand 696 states and 1007 transitions. [2020-10-29 13:37:00,384 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2020-10-29 13:37:00,385 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:37:00,385 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 13:37:00,385 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-29 13:37:00,385 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:37:00,386 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:37:00,386 INFO L82 PathProgramCache]: Analyzing trace with hash 1994745176, now seen corresponding path program 1 times [2020-10-29 13:37:00,386 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:37:00,386 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [135648913] [2020-10-29 13:37:00,386 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:37:00,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:37:00,417 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:37:00,439 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:37:00,463 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:37:00,488 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:37:00,731 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:37:00,954 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:37:01,842 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:37:01,886 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:37:01,950 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:37:02,091 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:37:02,315 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:37:03,887 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:37:04,004 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:37:05,406 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:37:05,406 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 70 [2020-10-29 13:37:05,406 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 13 [2020-10-29 13:37:05,406 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-29 13:37:05,406 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:37:05,407 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:37:05,407 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-29 13:37:05,407 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-29 13:37:05,407 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 48 [2020-10-29 13:37:05,407 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:37:05,827 WARN L193 SmtUtils]: Spent 300.00 ms on a formula simplification that was a NOOP. DAG size: 142 [2020-10-29 13:37:05,828 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:37:05,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:37:05,842 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:37:05,860 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:37:05,860 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:37:05,860 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:37:05,861 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 21 [2020-10-29 13:37:05,861 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:37:05,861 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:37:05,861 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 13:37:05,861 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:37:05,861 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-29 13:37:05,862 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:37:05,880 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 13:37:05,880 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [135648913] [2020-10-29 13:37:05,880 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:37:05,880 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-29 13:37:05,882 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [639779530] [2020-10-29 13:37:05,883 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-29 13:37:05,888 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:37:05,889 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-29 13:37:05,889 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-10-29 13:37:05,889 INFO L87 Difference]: Start difference. First operand 696 states and 1007 transitions. Second operand 8 states. [2020-10-29 13:37:06,313 WARN L193 SmtUtils]: Spent 345.00 ms on a formula simplification that was a NOOP. DAG size: 147 [2020-10-29 13:37:07,622 WARN L193 SmtUtils]: Spent 390.00 ms on a formula simplification that was a NOOP. DAG size: 151 [2020-10-29 13:37:08,636 WARN L193 SmtUtils]: Spent 370.00 ms on a formula simplification that was a NOOP. DAG size: 149 [2020-10-29 13:37:08,858 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:37:08,858 INFO L93 Difference]: Finished difference Result 2242 states and 3272 transitions. [2020-10-29 13:37:08,859 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-29 13:37:08,859 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 62 [2020-10-29 13:37:08,859 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:37:08,867 INFO L225 Difference]: With dead ends: 2242 [2020-10-29 13:37:08,868 INFO L226 Difference]: Without dead ends: 1971 [2020-10-29 13:37:08,869 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=104, Invalid=238, Unknown=0, NotChecked=0, Total=342 [2020-10-29 13:37:08,871 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1971 states. [2020-10-29 13:37:08,953 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1971 to 736. [2020-10-29 13:37:08,953 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 736 states. [2020-10-29 13:37:08,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 736 states to 736 states and 1059 transitions. [2020-10-29 13:37:08,956 INFO L78 Accepts]: Start accepts. Automaton has 736 states and 1059 transitions. Word has length 62 [2020-10-29 13:37:08,957 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:37:08,957 INFO L481 AbstractCegarLoop]: Abstraction has 736 states and 1059 transitions. [2020-10-29 13:37:08,957 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-29 13:37:08,957 INFO L276 IsEmpty]: Start isEmpty. Operand 736 states and 1059 transitions. [2020-10-29 13:37:08,958 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-10-29 13:37:08,958 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:37:08,958 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 13:37:08,959 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-29 13:37:08,959 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:37:08,959 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:37:08,959 INFO L82 PathProgramCache]: Analyzing trace with hash -1996189416, now seen corresponding path program 1 times [2020-10-29 13:37:08,960 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:37:08,960 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1028839753] [2020-10-29 13:37:08,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:37:08,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:37:08,990 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:37:09,013 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:37:09,046 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:37:09,077 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:37:09,473 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:37:09,668 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:37:09,709 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:37:09,857 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:37:10,257 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:37:10,444 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:37:10,521 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:37:12,934 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:37:13,027 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:37:13,081 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:37:13,214 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:37:13,738 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:37:13,969 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:37:14,002 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:37:14,002 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 71 [2020-10-29 13:37:14,002 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 17 [2020-10-29 13:37:14,002 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5022 [2020-10-29 13:37:14,002 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:37:14,003 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:37:14,003 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-29 13:37:14,003 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-29 13:37:14,003 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 55 [2020-10-29 13:37:14,003 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:37:14,511 WARN L193 SmtUtils]: Spent 333.00 ms on a formula simplification that was a NOOP. DAG size: 142 [2020-10-29 13:37:14,513 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:37:14,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:37:14,527 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:37:14,541 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:37:14,541 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:37:14,541 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:37:14,541 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 17 [2020-10-29 13:37:14,542 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:37:14,542 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:37:14,542 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 13:37:14,542 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:37:14,542 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-29 13:37:14,542 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:37:14,570 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 13:37:14,570 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1028839753] [2020-10-29 13:37:14,571 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:37:14,571 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-10-29 13:37:14,571 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1035850193] [2020-10-29 13:37:14,571 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-29 13:37:14,572 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:37:14,572 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-29 13:37:14,572 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2020-10-29 13:37:14,573 INFO L87 Difference]: Start difference. First operand 736 states and 1059 transitions. Second operand 9 states. [2020-10-29 13:37:14,965 WARN L193 SmtUtils]: Spent 318.00 ms on a formula simplification that was a NOOP. DAG size: 146 [2020-10-29 13:37:16,720 WARN L193 SmtUtils]: Spent 377.00 ms on a formula simplification that was a NOOP. DAG size: 149 [2020-10-29 13:37:18,239 WARN L193 SmtUtils]: Spent 361.00 ms on a formula simplification that was a NOOP. DAG size: 148 [2020-10-29 13:37:18,680 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:37:18,680 INFO L93 Difference]: Finished difference Result 3915 states and 5794 transitions. [2020-10-29 13:37:18,681 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-29 13:37:18,681 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 63 [2020-10-29 13:37:18,681 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:37:18,696 INFO L225 Difference]: With dead ends: 3915 [2020-10-29 13:37:18,696 INFO L226 Difference]: Without dead ends: 3413 [2020-10-29 13:37:18,698 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=134, Invalid=372, Unknown=0, NotChecked=0, Total=506 [2020-10-29 13:37:18,702 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3413 states. [2020-10-29 13:37:18,818 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3413 to 738. [2020-10-29 13:37:18,818 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 738 states. [2020-10-29 13:37:18,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 738 states to 738 states and 1061 transitions. [2020-10-29 13:37:18,821 INFO L78 Accepts]: Start accepts. Automaton has 738 states and 1061 transitions. Word has length 63 [2020-10-29 13:37:18,821 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:37:18,821 INFO L481 AbstractCegarLoop]: Abstraction has 738 states and 1061 transitions. [2020-10-29 13:37:18,821 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-29 13:37:18,821 INFO L276 IsEmpty]: Start isEmpty. Operand 738 states and 1061 transitions. [2020-10-29 13:37:18,823 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-10-29 13:37:18,823 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:37:18,823 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 13:37:18,823 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-29 13:37:18,823 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:37:18,824 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:37:18,824 INFO L82 PathProgramCache]: Analyzing trace with hash -1774307125, now seen corresponding path program 1 times [2020-10-29 13:37:18,824 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:37:18,824 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1829778324] [2020-10-29 13:37:18,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:37:18,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:37:18,855 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:37:18,877 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:37:18,906 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:37:18,930 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:37:19,362 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:37:19,404 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:37:19,526 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:37:19,726 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:37:19,803 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:37:19,838 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:37:19,933 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:37:20,019 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:37:20,087 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:37:22,684 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:37:22,715 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:37:22,749 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:37:22,836 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:37:22,870 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:37:23,186 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:37:23,236 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:37:23,295 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:37:23,847 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:37:23,847 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 71 [2020-10-29 13:37:23,849 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 21 [2020-10-29 13:37:23,849 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-29 13:37:23,849 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:37:23,850 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:37:23,850 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-29 13:37:23,850 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-29 13:37:23,852 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 46 [2020-10-29 13:37:23,852 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-29 13:37:24,337 WARN L193 SmtUtils]: Spent 343.00 ms on a formula simplification that was a NOOP. DAG size: 142 [2020-10-29 13:37:24,338 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:37:24,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:37:24,353 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:37:24,365 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:37:24,365 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:37:24,365 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:37:24,365 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 15 [2020-10-29 13:37:24,366 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:37:24,366 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:37:24,366 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 13:37:24,366 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:37:24,366 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-29 13:37:24,367 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:37:24,396 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 13:37:24,397 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1829778324] [2020-10-29 13:37:24,397 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:37:24,397 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-10-29 13:37:24,397 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [891122013] [2020-10-29 13:37:24,398 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-29 13:37:24,398 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:37:24,398 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-29 13:37:24,399 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2020-10-29 13:37:24,399 INFO L87 Difference]: Start difference. First operand 738 states and 1061 transitions. Second operand 9 states. [2020-10-29 13:37:24,773 WARN L193 SmtUtils]: Spent 306.00 ms on a formula simplification that was a NOOP. DAG size: 146 [2020-10-29 13:37:26,473 WARN L193 SmtUtils]: Spent 361.00 ms on a formula simplification that was a NOOP. DAG size: 149 [2020-10-29 13:37:27,870 WARN L193 SmtUtils]: Spent 358.00 ms on a formula simplification that was a NOOP. DAG size: 148 [2020-10-29 13:37:28,309 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:37:28,309 INFO L93 Difference]: Finished difference Result 3447 states and 5036 transitions. [2020-10-29 13:37:28,310 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-29 13:37:28,310 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 63 [2020-10-29 13:37:28,311 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:37:28,324 INFO L225 Difference]: With dead ends: 3447 [2020-10-29 13:37:28,324 INFO L226 Difference]: Without dead ends: 2861 [2020-10-29 13:37:28,327 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=134, Invalid=372, Unknown=0, NotChecked=0, Total=506 [2020-10-29 13:37:28,331 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2861 states. [2020-10-29 13:37:28,457 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2861 to 730. [2020-10-29 13:37:28,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 730 states. [2020-10-29 13:37:28,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 730 states to 730 states and 1029 transitions. [2020-10-29 13:37:28,460 INFO L78 Accepts]: Start accepts. Automaton has 730 states and 1029 transitions. Word has length 63 [2020-10-29 13:37:28,460 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:37:28,460 INFO L481 AbstractCegarLoop]: Abstraction has 730 states and 1029 transitions. [2020-10-29 13:37:28,460 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-29 13:37:28,460 INFO L276 IsEmpty]: Start isEmpty. Operand 730 states and 1029 transitions. [2020-10-29 13:37:28,462 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2020-10-29 13:37:28,462 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:37:28,462 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 13:37:28,462 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-29 13:37:28,462 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:37:28,463 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:37:28,463 INFO L82 PathProgramCache]: Analyzing trace with hash 230473140, now seen corresponding path program 1 times [2020-10-29 13:37:28,463 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:37:28,463 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [29140357] [2020-10-29 13:37:28,463 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:37:28,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:37:28,497 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:37:28,519 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:37:28,548 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:37:28,650 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:37:28,786 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:37:28,899 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:37:28,954 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:37:29,032 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:37:29,070 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:37:29,554 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:37:31,688 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:37:31,706 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:37:31,760 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:37:31,782 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:37:31,836 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:37:33,487 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:37:33,487 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 72 [2020-10-29 13:37:33,488 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 15 [2020-10-29 13:37:33,488 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-29 13:37:33,488 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:37:33,488 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:37:33,488 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-29 13:37:33,488 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-29 13:37:33,489 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 53 [2020-10-29 13:37:33,489 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:37:33,966 WARN L193 SmtUtils]: Spent 330.00 ms on a formula simplification that was a NOOP. DAG size: 142 [2020-10-29 13:37:33,967 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:37:33,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:37:33,979 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:37:33,990 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:37:33,990 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:37:33,990 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:37:33,991 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 14 [2020-10-29 13:37:33,991 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:37:33,991 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:37:33,991 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 13:37:33,991 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:37:33,991 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-29 13:37:33,991 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:37:34,009 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 13:37:34,010 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [29140357] [2020-10-29 13:37:34,010 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:37:34,010 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-10-29 13:37:34,010 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2044793685] [2020-10-29 13:37:34,011 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-29 13:37:34,011 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:37:34,012 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-29 13:37:34,012 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2020-10-29 13:37:34,012 INFO L87 Difference]: Start difference. First operand 730 states and 1029 transitions. Second operand 9 states. [2020-10-29 13:37:34,411 WARN L193 SmtUtils]: Spent 342.00 ms on a formula simplification that was a NOOP. DAG size: 146 [2020-10-29 13:37:36,390 WARN L193 SmtUtils]: Spent 369.00 ms on a formula simplification that was a NOOP. DAG size: 149 [2020-10-29 13:37:37,800 WARN L193 SmtUtils]: Spent 372.00 ms on a formula simplification that was a NOOP. DAG size: 148 [2020-10-29 13:37:38,384 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:37:38,384 INFO L93 Difference]: Finished difference Result 4679 states and 6736 transitions. [2020-10-29 13:37:38,385 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-29 13:37:38,385 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 64 [2020-10-29 13:37:38,385 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:37:38,401 INFO L225 Difference]: With dead ends: 4679 [2020-10-29 13:37:38,401 INFO L226 Difference]: Without dead ends: 4141 [2020-10-29 13:37:38,403 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=134, Invalid=372, Unknown=0, NotChecked=0, Total=506 [2020-10-29 13:37:38,408 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4141 states. [2020-10-29 13:37:38,543 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4141 to 731. [2020-10-29 13:37:38,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 731 states. [2020-10-29 13:37:38,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 731 states to 731 states and 1030 transitions. [2020-10-29 13:37:38,545 INFO L78 Accepts]: Start accepts. Automaton has 731 states and 1030 transitions. Word has length 64 [2020-10-29 13:37:38,546 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:37:38,546 INFO L481 AbstractCegarLoop]: Abstraction has 731 states and 1030 transitions. [2020-10-29 13:37:38,546 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-29 13:37:38,546 INFO L276 IsEmpty]: Start isEmpty. Operand 731 states and 1030 transitions. [2020-10-29 13:37:38,547 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-10-29 13:37:38,547 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:37:38,547 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 13:37:38,548 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-29 13:37:38,548 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:37:38,548 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:37:38,548 INFO L82 PathProgramCache]: Analyzing trace with hash -564702334, now seen corresponding path program 1 times [2020-10-29 13:37:38,549 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:37:38,549 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [782356847] [2020-10-29 13:37:38,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:37:38,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:37:38,578 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:37:38,599 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:37:38,624 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:37:38,881 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:37:38,927 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:37:38,968 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:37:38,995 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:37:39,050 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:37:39,142 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:37:40,030 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:37:40,105 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:37:40,478 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:37:40,646 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:37:40,709 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:37:40,762 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:37:40,956 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:37:41,021 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:37:43,570 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:37:43,570 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 73 [2020-10-29 13:37:43,571 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 17 [2020-10-29 13:37:43,571 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-29 13:37:43,571 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:37:43,571 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:37:43,571 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-29 13:37:43,571 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 13:37:43,571 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 51 [2020-10-29 13:37:43,571 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:37:43,940 WARN L193 SmtUtils]: Spent 241.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 23 [2020-10-29 13:37:44,349 WARN L193 SmtUtils]: Spent 333.00 ms on a formula simplification that was a NOOP. DAG size: 142 [2020-10-29 13:37:44,351 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:37:44,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:37:44,359 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:37:44,365 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:37:44,365 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:37:44,365 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:37:44,365 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-29 13:37:44,366 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:37:44,366 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:37:44,366 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 13:37:44,366 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:37:44,366 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 13:37:44,366 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:37:44,384 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 13:37:44,385 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [782356847] [2020-10-29 13:37:44,385 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:37:44,385 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-10-29 13:37:44,385 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1783213906] [2020-10-29 13:37:44,386 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-29 13:37:44,386 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:37:44,386 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-29 13:37:44,386 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2020-10-29 13:37:44,387 INFO L87 Difference]: Start difference. First operand 731 states and 1030 transitions. Second operand 9 states. [2020-10-29 13:37:45,244 WARN L193 SmtUtils]: Spent 741.00 ms on a formula simplification. DAG size of input: 156 DAG size of output: 152 [2020-10-29 13:37:45,619 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 30 [2020-10-29 13:37:46,357 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 32 [2020-10-29 13:37:46,791 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 28 [2020-10-29 13:37:48,368 WARN L193 SmtUtils]: Spent 771.00 ms on a formula simplification. DAG size of input: 157 DAG size of output: 150 [2020-10-29 13:37:49,476 WARN L193 SmtUtils]: Spent 355.00 ms on a formula simplification that was a NOOP. DAG size: 144 [2020-10-29 13:37:50,473 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 30 [2020-10-29 13:37:51,582 WARN L193 SmtUtils]: Spent 755.00 ms on a formula simplification. DAG size of input: 156 DAG size of output: 149 [2020-10-29 13:37:52,381 WARN L193 SmtUtils]: Spent 760.00 ms on a formula simplification. DAG size of input: 154 DAG size of output: 154 [2020-10-29 13:37:52,925 WARN L193 SmtUtils]: Spent 354.00 ms on a formula simplification that was a NOOP. DAG size: 143 [2020-10-29 13:37:53,815 WARN L193 SmtUtils]: Spent 753.00 ms on a formula simplification. DAG size of input: 153 DAG size of output: 153 [2020-10-29 13:37:54,877 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:37:54,878 INFO L93 Difference]: Finished difference Result 7006 states and 10062 transitions. [2020-10-29 13:37:54,878 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-10-29 13:37:54,878 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 65 [2020-10-29 13:37:54,879 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:37:54,903 INFO L225 Difference]: With dead ends: 7006 [2020-10-29 13:37:54,903 INFO L226 Difference]: Without dead ends: 6504 [2020-10-29 13:37:54,906 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 520 ImplicationChecksByTransitivity, 6.9s TimeCoverageRelationStatistics Valid=341, Invalid=1381, Unknown=0, NotChecked=0, Total=1722 [2020-10-29 13:37:54,913 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6504 states. [2020-10-29 13:37:55,104 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6504 to 733. [2020-10-29 13:37:55,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 733 states. [2020-10-29 13:37:55,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 733 states to 733 states and 1032 transitions. [2020-10-29 13:37:55,106 INFO L78 Accepts]: Start accepts. Automaton has 733 states and 1032 transitions. Word has length 65 [2020-10-29 13:37:55,106 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:37:55,106 INFO L481 AbstractCegarLoop]: Abstraction has 733 states and 1032 transitions. [2020-10-29 13:37:55,107 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-29 13:37:55,107 INFO L276 IsEmpty]: Start isEmpty. Operand 733 states and 1032 transitions. [2020-10-29 13:37:55,108 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-10-29 13:37:55,108 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:37:55,108 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 13:37:55,109 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-29 13:37:55,109 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:37:55,109 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:37:55,109 INFO L82 PathProgramCache]: Analyzing trace with hash -1877104227, now seen corresponding path program 1 times [2020-10-29 13:37:55,110 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:37:55,110 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [638708550] [2020-10-29 13:37:55,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:37:55,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:37:55,144 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:37:55,173 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:37:55,341 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:37:55,656 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:37:55,877 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:37:58,745 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:37:58,745 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 73 [2020-10-29 13:37:58,745 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-29 13:37:58,746 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3613 [2020-10-29 13:37:58,746 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:37:58,746 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:37:58,746 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-29 13:37:58,746 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 13:37:58,746 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 54 [2020-10-29 13:37:58,746 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:37:59,587 WARN L193 SmtUtils]: Spent 350.00 ms on a formula simplification that was a NOOP. DAG size: 142 [2020-10-29 13:37:59,588 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:37:59,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:37:59,594 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:37:59,598 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:37:59,598 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:37:59,598 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:37:59,598 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-29 13:37:59,598 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:37:59,598 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:37:59,598 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 13:37:59,599 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:37:59,599 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 13:37:59,599 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:37:59,620 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 13:37:59,620 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [638708550] [2020-10-29 13:37:59,620 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:37:59,620 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-10-29 13:37:59,621 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1734521388] [2020-10-29 13:37:59,621 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-29 13:37:59,621 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:37:59,622 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-29 13:37:59,622 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2020-10-29 13:37:59,622 INFO L87 Difference]: Start difference. First operand 733 states and 1032 transitions. Second operand 10 states. [2020-10-29 13:38:00,105 WARN L193 SmtUtils]: Spent 401.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2020-10-29 13:38:02,469 WARN L193 SmtUtils]: Spent 406.00 ms on a formula simplification that was a NOOP. DAG size: 159 [2020-10-29 13:38:03,740 WARN L193 SmtUtils]: Spent 373.00 ms on a formula simplification that was a NOOP. DAG size: 159 [2020-10-29 13:38:05,093 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:38:05,093 INFO L93 Difference]: Finished difference Result 5701 states and 8336 transitions. [2020-10-29 13:38:05,097 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-29 13:38:05,097 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 65 [2020-10-29 13:38:05,097 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:38:05,121 INFO L225 Difference]: With dead ends: 5701 [2020-10-29 13:38:05,122 INFO L226 Difference]: Without dead ends: 5466 [2020-10-29 13:38:05,124 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 115 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=125, Invalid=475, Unknown=0, NotChecked=0, Total=600 [2020-10-29 13:38:05,129 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5466 states. [2020-10-29 13:38:05,334 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5466 to 831. [2020-10-29 13:38:05,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 831 states. [2020-10-29 13:38:05,336 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 831 states to 831 states and 1166 transitions. [2020-10-29 13:38:05,337 INFO L78 Accepts]: Start accepts. Automaton has 831 states and 1166 transitions. Word has length 65 [2020-10-29 13:38:05,337 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:38:05,337 INFO L481 AbstractCegarLoop]: Abstraction has 831 states and 1166 transitions. [2020-10-29 13:38:05,337 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-29 13:38:05,337 INFO L276 IsEmpty]: Start isEmpty. Operand 831 states and 1166 transitions. [2020-10-29 13:38:05,339 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-10-29 13:38:05,339 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:38:05,339 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 13:38:05,339 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-29 13:38:05,339 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:38:05,340 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:38:05,340 INFO L82 PathProgramCache]: Analyzing trace with hash 1238095972, now seen corresponding path program 1 times [2020-10-29 13:38:05,340 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:38:05,340 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [334329821] [2020-10-29 13:38:05,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:38:05,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:38:05,369 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:38:05,389 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:38:05,409 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:38:05,446 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:38:05,557 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:38:05,583 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:38:07,627 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:38:07,646 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:38:07,759 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:38:07,801 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:38:07,833 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:38:08,562 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:38:09,872 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:38:09,910 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:38:10,360 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:38:10,360 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 73 [2020-10-29 13:38:10,360 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 14 [2020-10-29 13:38:10,360 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-29 13:38:10,361 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:38:10,361 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:38:10,361 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-29 13:38:10,361 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-10-29 13:38:10,361 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 40 [2020-10-29 13:38:10,361 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:38:10,749 WARN L193 SmtUtils]: Spent 339.00 ms on a formula simplification that was a NOOP. DAG size: 142 [2020-10-29 13:38:10,750 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:38:10,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:38:10,756 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:38:10,761 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:38:10,761 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:38:10,762 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:38:10,762 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-29 13:38:10,762 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:38:10,762 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:38:10,762 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 13:38:10,762 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:38:10,762 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 13:38:10,762 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:38:10,770 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 13:38:10,770 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [334329821] [2020-10-29 13:38:10,771 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:38:10,771 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-29 13:38:10,771 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [513450478] [2020-10-29 13:38:10,771 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-29 13:38:10,771 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:38:10,772 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-29 13:38:10,772 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-29 13:38:10,772 INFO L87 Difference]: Start difference. First operand 831 states and 1166 transitions. Second operand 6 states. [2020-10-29 13:38:11,166 WARN L193 SmtUtils]: Spent 345.00 ms on a formula simplification that was a NOOP. DAG size: 143 [2020-10-29 13:38:15,073 WARN L193 SmtUtils]: Spent 357.00 ms on a formula simplification that was a NOOP. DAG size: 144 [2020-10-29 13:38:15,517 WARN L193 SmtUtils]: Spent 345.00 ms on a formula simplification that was a NOOP. DAG size: 143 [2020-10-29 13:38:16,436 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:38:16,436 INFO L93 Difference]: Finished difference Result 4551 states and 6605 transitions. [2020-10-29 13:38:16,437 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-29 13:38:16,437 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 65 [2020-10-29 13:38:16,437 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:38:16,446 INFO L225 Difference]: With dead ends: 4551 [2020-10-29 13:38:16,446 INFO L226 Difference]: Without dead ends: 3857 [2020-10-29 13:38:16,448 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2020-10-29 13:38:16,452 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3857 states. [2020-10-29 13:38:16,967 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3857 to 2251. [2020-10-29 13:38:16,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2251 states. [2020-10-29 13:38:16,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2251 states to 2251 states and 3210 transitions. [2020-10-29 13:38:16,972 INFO L78 Accepts]: Start accepts. Automaton has 2251 states and 3210 transitions. Word has length 65 [2020-10-29 13:38:16,972 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:38:16,972 INFO L481 AbstractCegarLoop]: Abstraction has 2251 states and 3210 transitions. [2020-10-29 13:38:16,972 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-29 13:38:16,972 INFO L276 IsEmpty]: Start isEmpty. Operand 2251 states and 3210 transitions. [2020-10-29 13:38:16,974 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-10-29 13:38:16,974 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:38:16,975 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 13:38:16,975 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-29 13:38:16,975 INFO L429 AbstractCegarLoop]: === Iteration 14 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:38:16,975 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:38:16,975 INFO L82 PathProgramCache]: Analyzing trace with hash -247467393, now seen corresponding path program 1 times [2020-10-29 13:38:16,976 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:38:16,976 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [70564880] [2020-10-29 13:38:16,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:38:16,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:38:17,004 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:38:17,028 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:38:17,063 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:38:17,233 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:38:17,356 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:38:21,055 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:38:21,056 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 73 [2020-10-29 13:38:21,056 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-29 13:38:21,056 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4061 [2020-10-29 13:38:21,056 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:38:21,056 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:38:21,056 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-29 13:38:21,056 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 13:38:21,056 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 45 [2020-10-29 13:38:21,056 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:38:21,794 WARN L193 SmtUtils]: Spent 334.00 ms on a formula simplification that was a NOOP. DAG size: 142 [2020-10-29 13:38:21,795 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:38:21,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:38:21,801 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:38:21,807 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:38:21,807 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:38:21,807 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:38:21,807 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-29 13:38:21,807 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:38:21,808 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:38:21,808 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 13:38:21,808 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:38:21,808 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 13:38:21,808 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:38:21,833 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 13:38:21,833 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [70564880] [2020-10-29 13:38:21,833 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:38:21,833 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-10-29 13:38:21,833 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2132650895] [2020-10-29 13:38:21,834 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-29 13:38:21,834 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:38:21,834 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-29 13:38:21,834 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2020-10-29 13:38:21,834 INFO L87 Difference]: Start difference. First operand 2251 states and 3210 transitions. Second operand 10 states. [2020-10-29 13:38:22,320 WARN L193 SmtUtils]: Spent 401.00 ms on a formula simplification that was a NOOP. DAG size: 158 [2020-10-29 13:38:22,866 WARN L193 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 39 [2020-10-29 13:38:23,049 WARN L193 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 42 [2020-10-29 13:38:23,226 WARN L193 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 42 [2020-10-29 13:38:23,445 WARN L193 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 42 [2020-10-29 13:38:25,437 WARN L193 SmtUtils]: Spent 865.00 ms on a formula simplification. DAG size of input: 170 DAG size of output: 163 [2020-10-29 13:38:27,265 WARN L193 SmtUtils]: Spent 386.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-29 13:38:29,162 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:38:29,162 INFO L93 Difference]: Finished difference Result 11347 states and 16635 transitions. [2020-10-29 13:38:29,163 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-29 13:38:29,163 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 65 [2020-10-29 13:38:29,163 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:38:29,181 INFO L225 Difference]: With dead ends: 11347 [2020-10-29 13:38:29,181 INFO L226 Difference]: Without dead ends: 9299 [2020-10-29 13:38:29,186 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=90, Invalid=290, Unknown=0, NotChecked=0, Total=380 [2020-10-29 13:38:29,196 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9299 states. [2020-10-29 13:38:30,216 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9299 to 3611. [2020-10-29 13:38:30,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3611 states. [2020-10-29 13:38:30,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3611 states to 3611 states and 5194 transitions. [2020-10-29 13:38:30,221 INFO L78 Accepts]: Start accepts. Automaton has 3611 states and 5194 transitions. Word has length 65 [2020-10-29 13:38:30,222 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:38:30,222 INFO L481 AbstractCegarLoop]: Abstraction has 3611 states and 5194 transitions. [2020-10-29 13:38:30,222 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-29 13:38:30,222 INFO L276 IsEmpty]: Start isEmpty. Operand 3611 states and 5194 transitions. [2020-10-29 13:38:30,224 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-10-29 13:38:30,224 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:38:30,224 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 13:38:30,224 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-29 13:38:30,224 INFO L429 AbstractCegarLoop]: === Iteration 15 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:38:30,225 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:38:30,225 INFO L82 PathProgramCache]: Analyzing trace with hash -818575966, now seen corresponding path program 1 times [2020-10-29 13:38:30,225 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:38:30,225 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1145974849] [2020-10-29 13:38:30,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:38:30,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:38:30,251 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:38:30,265 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:38:30,281 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:38:30,525 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:38:30,564 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:38:30,793 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:38:31,161 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:38:35,242 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:38:35,243 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 74 [2020-10-29 13:38:35,243 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-29 13:38:35,243 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-29 13:38:35,243 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:38:35,243 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:38:35,243 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-29 13:38:35,243 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 13:38:35,243 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 49 [2020-10-29 13:38:35,244 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:38:35,484 WARN L193 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 25 [2020-10-29 13:38:35,909 WARN L193 SmtUtils]: Spent 337.00 ms on a formula simplification that was a NOOP. DAG size: 142 [2020-10-29 13:38:35,910 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:38:35,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:38:35,915 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:38:35,919 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:38:35,919 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:38:35,919 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:38:35,919 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-29 13:38:35,920 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:38:35,920 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:38:35,920 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 13:38:35,920 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:38:35,920 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 13:38:35,920 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:38:35,932 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 13:38:35,933 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1145974849] [2020-10-29 13:38:35,933 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:38:35,933 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-10-29 13:38:35,933 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1033014312] [2020-10-29 13:38:35,933 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-29 13:38:35,933 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:38:35,934 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-29 13:38:35,935 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2020-10-29 13:38:35,935 INFO L87 Difference]: Start difference. First operand 3611 states and 5194 transitions. Second operand 10 states. [2020-10-29 13:38:36,369 WARN L193 SmtUtils]: Spent 369.00 ms on a formula simplification that was a NOOP. DAG size: 149 [2020-10-29 13:38:39,561 WARN L193 SmtUtils]: Spent 381.00 ms on a formula simplification that was a NOOP. DAG size: 151 [2020-10-29 13:38:42,034 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:38:42,035 INFO L93 Difference]: Finished difference Result 10556 states and 15429 transitions. [2020-10-29 13:38:42,035 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-29 13:38:42,036 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 66 [2020-10-29 13:38:42,036 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:38:42,056 INFO L225 Difference]: With dead ends: 10556 [2020-10-29 13:38:42,056 INFO L226 Difference]: Without dead ends: 9016 [2020-10-29 13:38:42,062 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=80, Invalid=262, Unknown=0, NotChecked=0, Total=342 [2020-10-29 13:38:42,071 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9016 states. [2020-10-29 13:38:43,168 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9016 to 3442. [2020-10-29 13:38:43,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3442 states. [2020-10-29 13:38:43,173 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3442 states to 3442 states and 4955 transitions. [2020-10-29 13:38:43,173 INFO L78 Accepts]: Start accepts. Automaton has 3442 states and 4955 transitions. Word has length 66 [2020-10-29 13:38:43,173 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:38:43,173 INFO L481 AbstractCegarLoop]: Abstraction has 3442 states and 4955 transitions. [2020-10-29 13:38:43,173 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-29 13:38:43,174 INFO L276 IsEmpty]: Start isEmpty. Operand 3442 states and 4955 transitions. [2020-10-29 13:38:43,178 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2020-10-29 13:38:43,178 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:38:43,178 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 13:38:43,178 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-29 13:38:43,179 INFO L429 AbstractCegarLoop]: === Iteration 16 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:38:43,179 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:38:43,179 INFO L82 PathProgramCache]: Analyzing trace with hash 1698070081, now seen corresponding path program 1 times [2020-10-29 13:38:43,179 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:38:43,179 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [16224018] [2020-10-29 13:38:43,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:38:43,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:38:43,221 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:38:43,244 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:38:43,264 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:38:43,338 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:38:43,690 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:38:45,083 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:38:45,083 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 82 [2020-10-29 13:38:45,084 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-29 13:38:45,084 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1877 [2020-10-29 13:38:45,084 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:38:45,084 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:38:45,084 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-29 13:38:45,084 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-29 13:38:45,084 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-10-29 13:38:45,084 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:38:45,478 WARN L193 SmtUtils]: Spent 336.00 ms on a formula simplification that was a NOOP. DAG size: 142 [2020-10-29 13:38:45,479 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:38:45,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:38:45,486 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:38:45,490 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:38:45,491 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:38:45,491 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:38:45,491 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-29 13:38:45,491 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:38:45,491 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:38:45,491 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 13:38:45,491 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:38:45,491 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 13:38:45,491 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:38:45,508 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 13:38:45,508 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [16224018] [2020-10-29 13:38:45,508 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:38:45,508 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-29 13:38:45,508 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [290472185] [2020-10-29 13:38:45,509 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-29 13:38:45,509 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:38:45,509 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-29 13:38:45,510 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-29 13:38:45,510 INFO L87 Difference]: Start difference. First operand 3442 states and 4955 transitions. Second operand 6 states. [2020-10-29 13:38:47,453 WARN L193 SmtUtils]: Spent 354.00 ms on a formula simplification that was a NOOP. DAG size: 148 [2020-10-29 13:38:47,844 WARN L193 SmtUtils]: Spent 357.00 ms on a formula simplification that was a NOOP. DAG size: 151 [2020-10-29 13:38:48,248 WARN L193 SmtUtils]: Spent 362.00 ms on a formula simplification that was a NOOP. DAG size: 153 [2020-10-29 13:38:49,424 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:38:49,425 INFO L93 Difference]: Finished difference Result 9068 states and 13189 transitions. [2020-10-29 13:38:49,425 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-29 13:38:49,426 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 74 [2020-10-29 13:38:49,426 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:38:49,441 INFO L225 Difference]: With dead ends: 9068 [2020-10-29 13:38:49,441 INFO L226 Difference]: Without dead ends: 6148 [2020-10-29 13:38:49,448 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-10-29 13:38:49,454 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6148 states. [2020-10-29 13:38:50,965 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6148 to 4724. [2020-10-29 13:38:50,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4724 states. [2020-10-29 13:38:50,971 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4724 states to 4724 states and 6732 transitions. [2020-10-29 13:38:50,971 INFO L78 Accepts]: Start accepts. Automaton has 4724 states and 6732 transitions. Word has length 74 [2020-10-29 13:38:50,971 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:38:50,972 INFO L481 AbstractCegarLoop]: Abstraction has 4724 states and 6732 transitions. [2020-10-29 13:38:50,972 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-29 13:38:50,972 INFO L276 IsEmpty]: Start isEmpty. Operand 4724 states and 6732 transitions. [2020-10-29 13:38:50,977 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2020-10-29 13:38:50,977 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:38:50,977 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 13:38:50,977 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-29 13:38:50,978 INFO L429 AbstractCegarLoop]: === Iteration 17 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:38:50,978 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:38:50,978 INFO L82 PathProgramCache]: Analyzing trace with hash 667343999, now seen corresponding path program 1 times [2020-10-29 13:38:50,978 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:38:50,978 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1969691772] [2020-10-29 13:38:50,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:38:50,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:38:51,008 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:38:51,029 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:38:51,047 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:38:51,108 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:38:51,429 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:38:52,769 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:38:52,769 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 83 [2020-10-29 13:38:52,769 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-29 13:38:52,770 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1771 [2020-10-29 13:38:52,770 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:38:52,770 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:38:52,770 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-29 13:38:52,770 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-29 13:38:52,770 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 37 [2020-10-29 13:38:52,770 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:38:53,171 WARN L193 SmtUtils]: Spent 342.00 ms on a formula simplification that was a NOOP. DAG size: 142 [2020-10-29 13:38:53,172 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:38:53,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:38:53,182 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:38:53,190 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:38:53,191 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:38:53,191 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:38:53,191 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-29 13:38:53,191 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:38:53,191 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:38:53,191 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 13:38:53,191 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:38:53,191 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-29 13:38:53,191 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:38:53,203 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 13:38:53,203 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1969691772] [2020-10-29 13:38:53,203 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:38:53,203 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-29 13:38:53,203 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [78676511] [2020-10-29 13:38:53,204 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-29 13:38:53,204 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:38:53,204 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-29 13:38:53,205 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-29 13:38:53,205 INFO L87 Difference]: Start difference. First operand 4724 states and 6732 transitions. Second operand 6 states. [2020-10-29 13:38:53,641 WARN L193 SmtUtils]: Spent 372.00 ms on a formula simplification that was a NOOP. DAG size: 150 [2020-10-29 13:38:55,798 WARN L193 SmtUtils]: Spent 362.00 ms on a formula simplification that was a NOOP. DAG size: 148 [2020-10-29 13:38:57,414 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:38:57,414 INFO L93 Difference]: Finished difference Result 11278 states and 16359 transitions. [2020-10-29 13:38:57,415 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-29 13:38:57,415 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 75 [2020-10-29 13:38:57,415 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:38:57,424 INFO L225 Difference]: With dead ends: 11278 [2020-10-29 13:38:57,425 INFO L226 Difference]: Without dead ends: 7257 [2020-10-29 13:38:57,433 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2020-10-29 13:38:57,439 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7257 states. [2020-10-29 13:38:59,760 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7257 to 7254. [2020-10-29 13:38:59,760 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7254 states. [2020-10-29 13:38:59,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7254 states to 7254 states and 10455 transitions. [2020-10-29 13:38:59,770 INFO L78 Accepts]: Start accepts. Automaton has 7254 states and 10455 transitions. Word has length 75 [2020-10-29 13:38:59,770 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:38:59,770 INFO L481 AbstractCegarLoop]: Abstraction has 7254 states and 10455 transitions. [2020-10-29 13:38:59,770 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-29 13:38:59,770 INFO L276 IsEmpty]: Start isEmpty. Operand 7254 states and 10455 transitions. [2020-10-29 13:38:59,777 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2020-10-29 13:38:59,777 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:38:59,778 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 13:38:59,778 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-29 13:38:59,778 INFO L429 AbstractCegarLoop]: === Iteration 18 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:38:59,778 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:38:59,778 INFO L82 PathProgramCache]: Analyzing trace with hash 1481586224, now seen corresponding path program 1 times [2020-10-29 13:38:59,779 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:38:59,779 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [577445289] [2020-10-29 13:38:59,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:38:59,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:38:59,816 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:38:59,846 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:38:59,872 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:38:59,968 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:39:00,309 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:39:01,662 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:39:01,662 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 83 [2020-10-29 13:39:01,662 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-29 13:39:01,662 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1860 [2020-10-29 13:39:01,662 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:39:01,662 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:39:01,663 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-29 13:39:01,663 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-29 13:39:01,663 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 33 [2020-10-29 13:39:01,663 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:39:02,082 WARN L193 SmtUtils]: Spent 340.00 ms on a formula simplification that was a NOOP. DAG size: 142 [2020-10-29 13:39:02,083 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:39:02,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:39:02,093 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:39:02,101 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:39:02,102 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:39:02,102 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:39:02,102 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-29 13:39:02,102 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:39:02,102 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:39:02,102 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 13:39:02,102 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:39:02,102 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-29 13:39:02,102 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:39:02,117 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 13:39:02,118 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [577445289] [2020-10-29 13:39:02,118 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:39:02,118 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-29 13:39:02,118 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [581544890] [2020-10-29 13:39:02,118 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-29 13:39:02,119 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:39:02,119 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-29 13:39:02,119 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-10-29 13:39:02,119 INFO L87 Difference]: Start difference. First operand 7254 states and 10455 transitions. Second operand 6 states. [2020-10-29 13:39:02,559 WARN L193 SmtUtils]: Spent 372.00 ms on a formula simplification that was a NOOP. DAG size: 151 [2020-10-29 13:39:05,049 WARN L193 SmtUtils]: Spent 360.00 ms on a formula simplification that was a NOOP. DAG size: 149 [2020-10-29 13:39:08,210 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:39:08,210 INFO L93 Difference]: Finished difference Result 20099 states and 29361 transitions. [2020-10-29 13:39:08,211 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-29 13:39:08,211 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 75 [2020-10-29 13:39:08,211 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:39:08,228 INFO L225 Difference]: With dead ends: 20099 [2020-10-29 13:39:08,228 INFO L226 Difference]: Without dead ends: 13446 [2020-10-29 13:39:08,240 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2020-10-29 13:39:08,249 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13446 states. [2020-10-29 13:39:12,760 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13446 to 13443. [2020-10-29 13:39:12,761 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13443 states. [2020-10-29 13:39:12,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13443 states to 13443 states and 19492 transitions. [2020-10-29 13:39:12,779 INFO L78 Accepts]: Start accepts. Automaton has 13443 states and 19492 transitions. Word has length 75 [2020-10-29 13:39:12,779 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:39:12,780 INFO L481 AbstractCegarLoop]: Abstraction has 13443 states and 19492 transitions. [2020-10-29 13:39:12,780 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-29 13:39:12,780 INFO L276 IsEmpty]: Start isEmpty. Operand 13443 states and 19492 transitions. [2020-10-29 13:39:12,787 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2020-10-29 13:39:12,788 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:39:12,788 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 13:39:12,788 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-29 13:39:12,788 INFO L429 AbstractCegarLoop]: === Iteration 19 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:39:12,789 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:39:12,789 INFO L82 PathProgramCache]: Analyzing trace with hash 235594721, now seen corresponding path program 1 times [2020-10-29 13:39:12,789 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:39:12,789 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [425061036] [2020-10-29 13:39:12,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:39:12,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:39:12,825 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:39:12,849 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:39:12,865 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:39:12,938 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:39:13,265 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:39:14,584 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:39:14,585 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 83 [2020-10-29 13:39:14,585 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-29 13:39:14,585 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1773 [2020-10-29 13:39:14,585 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:39:14,585 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:39:14,585 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-29 13:39:14,585 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-29 13:39:14,585 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 29 [2020-10-29 13:39:14,586 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:39:15,004 WARN L193 SmtUtils]: Spent 336.00 ms on a formula simplification that was a NOOP. DAG size: 142 [2020-10-29 13:39:15,005 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:39:15,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:39:15,016 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:39:15,029 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:39:15,029 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:39:15,030 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:39:15,030 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 15 [2020-10-29 13:39:15,030 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:39:15,030 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:39:15,030 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 13:39:15,030 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:39:15,030 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-29 13:39:15,030 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:39:15,047 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 13:39:15,047 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [425061036] [2020-10-29 13:39:15,047 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:39:15,047 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-29 13:39:15,048 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1147996891] [2020-10-29 13:39:15,048 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-29 13:39:15,048 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:39:15,049 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-29 13:39:15,049 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-10-29 13:39:15,049 INFO L87 Difference]: Start difference. First operand 13443 states and 19492 transitions. Second operand 6 states. [2020-10-29 13:39:15,485 WARN L193 SmtUtils]: Spent 371.00 ms on a formula simplification that was a NOOP. DAG size: 151 [2020-10-29 13:39:17,566 WARN L193 SmtUtils]: Spent 360.00 ms on a formula simplification that was a NOOP. DAG size: 149 [2020-10-29 13:39:20,076 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:39:20,077 INFO L93 Difference]: Finished difference Result 22081 states and 32281 transitions. [2020-10-29 13:39:20,077 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-29 13:39:20,078 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 75 [2020-10-29 13:39:20,078 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:39:20,088 INFO L225 Difference]: With dead ends: 22081 [2020-10-29 13:39:20,088 INFO L226 Difference]: Without dead ends: 9918 [2020-10-29 13:39:20,108 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2020-10-29 13:39:20,115 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9918 states. [2020-10-29 13:39:23,505 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9918 to 9915. [2020-10-29 13:39:23,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9915 states. [2020-10-29 13:39:23,520 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9915 states to 9915 states and 14341 transitions. [2020-10-29 13:39:23,520 INFO L78 Accepts]: Start accepts. Automaton has 9915 states and 14341 transitions. Word has length 75 [2020-10-29 13:39:23,521 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:39:23,521 INFO L481 AbstractCegarLoop]: Abstraction has 9915 states and 14341 transitions. [2020-10-29 13:39:23,521 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-29 13:39:23,521 INFO L276 IsEmpty]: Start isEmpty. Operand 9915 states and 14341 transitions. [2020-10-29 13:39:23,525 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2020-10-29 13:39:23,525 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:39:23,525 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 13:39:23,525 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-29 13:39:23,525 INFO L429 AbstractCegarLoop]: === Iteration 20 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:39:23,525 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:39:23,526 INFO L82 PathProgramCache]: Analyzing trace with hash -398316810, now seen corresponding path program 1 times [2020-10-29 13:39:23,526 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:39:23,526 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [639274495] [2020-10-29 13:39:23,526 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:39:23,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:39:23,566 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:39:23,598 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:39:23,626 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:39:23,699 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:39:24,184 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:39:25,160 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:39:28,550 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:39:28,550 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 84 [2020-10-29 13:39:28,551 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-29 13:39:28,551 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-29 13:39:28,551 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:39:28,551 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:39:28,551 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-29 13:39:28,551 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 13:39:28,551 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 40 [2020-10-29 13:39:28,552 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:39:28,813 WARN L193 SmtUtils]: Spent 196.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 24 [2020-10-29 13:39:29,228 WARN L193 SmtUtils]: Spent 340.00 ms on a formula simplification that was a NOOP. DAG size: 142 [2020-10-29 13:39:29,229 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:39:29,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:39:29,234 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:39:29,238 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:39:29,238 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:39:29,238 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:39:29,238 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-29 13:39:29,238 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:39:29,239 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:39:29,239 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 13:39:29,239 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:39:29,239 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 13:39:29,239 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:39:29,254 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 13:39:29,254 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [639274495] [2020-10-29 13:39:29,254 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:39:29,254 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-10-29 13:39:29,254 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [311157704] [2020-10-29 13:39:29,255 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-29 13:39:29,255 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:39:29,255 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-29 13:39:29,255 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2020-10-29 13:39:29,256 INFO L87 Difference]: Start difference. First operand 9915 states and 14341 transitions. Second operand 9 states. [2020-10-29 13:39:29,741 WARN L193 SmtUtils]: Spent 396.00 ms on a formula simplification that was a NOOP. DAG size: 154 [2020-10-29 13:39:33,223 WARN L193 SmtUtils]: Spent 361.00 ms on a formula simplification that was a NOOP. DAG size: 148 [2020-10-29 13:39:33,697 WARN L193 SmtUtils]: Spent 372.00 ms on a formula simplification that was a NOOP. DAG size: 150 [2020-10-29 13:39:39,769 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:39:39,769 INFO L93 Difference]: Finished difference Result 24500 states and 35415 transitions. [2020-10-29 13:39:39,770 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-29 13:39:39,770 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 76 [2020-10-29 13:39:39,770 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:39:39,794 INFO L225 Difference]: With dead ends: 24500 [2020-10-29 13:39:39,795 INFO L226 Difference]: Without dead ends: 20660 [2020-10-29 13:39:39,803 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=80, Invalid=262, Unknown=0, NotChecked=0, Total=342 [2020-10-29 13:39:39,820 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20660 states. [2020-10-29 13:39:43,250 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20660 to 9870. [2020-10-29 13:39:43,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9870 states. [2020-10-29 13:39:43,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9870 states to 9870 states and 14278 transitions. [2020-10-29 13:39:43,264 INFO L78 Accepts]: Start accepts. Automaton has 9870 states and 14278 transitions. Word has length 76 [2020-10-29 13:39:43,264 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:39:43,264 INFO L481 AbstractCegarLoop]: Abstraction has 9870 states and 14278 transitions. [2020-10-29 13:39:43,264 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-29 13:39:43,265 INFO L276 IsEmpty]: Start isEmpty. Operand 9870 states and 14278 transitions. [2020-10-29 13:39:43,268 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2020-10-29 13:39:43,268 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:39:43,268 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 13:39:43,268 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-10-29 13:39:43,269 INFO L429 AbstractCegarLoop]: === Iteration 21 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:39:43,269 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:39:43,269 INFO L82 PathProgramCache]: Analyzing trace with hash -63447402, now seen corresponding path program 1 times [2020-10-29 13:39:43,269 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:39:43,269 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [219106872] [2020-10-29 13:39:43,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:39:43,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:39:43,300 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:39:43,320 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:39:43,339 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:39:43,376 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:39:43,712 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:39:44,930 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:39:48,288 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:39:48,288 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 84 [2020-10-29 13:39:48,288 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-29 13:39:48,288 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4999 [2020-10-29 13:39:48,288 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:39:48,288 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:39:48,288 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-29 13:39:48,288 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 13:39:48,289 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 46 [2020-10-29 13:39:48,289 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:39:48,494 WARN L193 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 26 [2020-10-29 13:39:48,903 WARN L193 SmtUtils]: Spent 336.00 ms on a formula simplification that was a NOOP. DAG size: 142 [2020-10-29 13:39:48,904 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:39:48,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:39:48,909 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:39:48,913 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:39:48,913 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:39:48,913 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:39:48,914 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-29 13:39:48,914 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:39:48,914 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:39:48,914 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 13:39:48,914 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:39:48,914 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 13:39:48,914 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:39:48,926 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 13:39:48,926 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [219106872] [2020-10-29 13:39:48,927 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:39:48,927 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-10-29 13:39:48,927 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1716159926] [2020-10-29 13:39:48,927 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-29 13:39:48,927 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:39:48,928 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-29 13:39:48,928 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2020-10-29 13:39:48,928 INFO L87 Difference]: Start difference. First operand 9870 states and 14278 transitions. Second operand 9 states. [2020-10-29 13:39:49,402 WARN L193 SmtUtils]: Spent 381.00 ms on a formula simplification that was a NOOP. DAG size: 154