/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --rcfgbuilder.size.of.a.code.block SequenceOfStatements --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=WIDESTAMONGSMALL --traceabstraction.additional.smt.options tolerance=0.6 --traceabstraction.additional.smt.options log-additional-information=true --traceabstraction.additional.smt.options unknown-allowed=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf language data_model -i ../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_lcr.3.ufo.BOUNDED-6.pals.c.v+sep-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-28 18:28:46,814 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-28 18:28:46,816 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-28 18:28:46,857 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-28 18:28:46,858 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-28 18:28:46,864 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-28 18:28:46,867 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-28 18:28:46,871 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-28 18:28:46,874 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-28 18:28:46,880 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-28 18:28:46,882 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-28 18:28:46,883 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-28 18:28:46,883 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-28 18:28:46,886 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-28 18:28:46,890 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-28 18:28:46,892 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-28 18:28:46,893 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-28 18:28:46,896 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-28 18:28:46,919 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-28 18:28:46,925 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-28 18:28:46,928 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-28 18:28:46,930 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-28 18:28:46,931 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-28 18:28:46,934 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-28 18:28:46,940 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-28 18:28:46,940 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-28 18:28:46,940 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-28 18:28:46,942 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-28 18:28:46,943 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-28 18:28:46,944 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-28 18:28:46,944 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-28 18:28:46,945 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-28 18:28:46,947 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-28 18:28:46,948 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-28 18:28:46,949 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-28 18:28:46,949 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-28 18:28:46,950 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-28 18:28:46,950 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-28 18:28:46,950 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-28 18:28:46,951 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-28 18:28:46,952 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-28 18:28:46,956 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-28 18:28:47,004 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-28 18:28:47,005 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-28 18:28:47,009 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-28 18:28:47,010 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-28 18:28:47,010 INFO L138 SettingsManager]: * Use SBE=true [2020-10-28 18:28:47,010 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-28 18:28:47,010 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-28 18:28:47,011 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-28 18:28:47,011 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-28 18:28:47,011 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-28 18:28:47,012 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-28 18:28:47,012 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-28 18:28:47,013 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-28 18:28:47,013 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-28 18:28:47,013 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-28 18:28:47,013 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-28 18:28:47,014 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-28 18:28:47,014 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-28 18:28:47,014 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-28 18:28:47,014 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-28 18:28:47,015 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-28 18:28:47,015 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-28 18:28:47,015 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-28 18:28:47,016 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-28 18:28:47,016 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-28 18:28:47,016 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-28 18:28:47,016 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-28 18:28:47,016 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-28 18:28:47,017 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-28 18:28:47,017 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.6;log-additional-information=true;unknown-allowed=true; [2020-10-28 18:28:47,464 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-28 18:28:47,495 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-28 18:28:47,499 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-28 18:28:47,500 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-28 18:28:47,501 INFO L275 PluginConnector]: CDTParser initialized [2020-10-28 18:28:47,502 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_lcr.3.ufo.BOUNDED-6.pals.c.v+sep-reducer.c [2020-10-28 18:28:47,592 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/221bdaac9/ed56e6f732eb40e4b60f7ebfafbd7517/FLAGd1bb64953 [2020-10-28 18:28:48,304 INFO L306 CDTParser]: Found 1 translation units. [2020-10-28 18:28:48,305 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/seq-mthreaded-reduced/pals_lcr.3.ufo.BOUNDED-6.pals.c.v+sep-reducer.c [2020-10-28 18:28:48,323 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/221bdaac9/ed56e6f732eb40e4b60f7ebfafbd7517/FLAGd1bb64953 [2020-10-28 18:28:48,538 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/221bdaac9/ed56e6f732eb40e4b60f7ebfafbd7517 [2020-10-28 18:28:48,543 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-28 18:28:48,551 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-28 18:28:48,556 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-28 18:28:48,556 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-28 18:28:48,561 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-28 18:28:48,562 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 06:28:48" (1/1) ... [2020-10-28 18:28:48,568 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5e538ad1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 06:28:48, skipping insertion in model container [2020-10-28 18:28:48,568 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 06:28:48" (1/1) ... [2020-10-28 18:28:48,577 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-28 18:28:48,663 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-28 18:28:49,205 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-28 18:28:49,232 INFO L203 MainTranslator]: Completed pre-run [2020-10-28 18:28:49,390 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-28 18:28:49,412 INFO L208 MainTranslator]: Completed translation [2020-10-28 18:28:49,413 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 06:28:49 WrapperNode [2020-10-28 18:28:49,413 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-28 18:28:49,414 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-28 18:28:49,414 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-28 18:28:49,414 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-28 18:28:49,428 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 06:28:49" (1/1) ... [2020-10-28 18:28:49,431 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 06:28:49" (1/1) ... [2020-10-28 18:28:49,472 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 06:28:49" (1/1) ... [2020-10-28 18:28:49,472 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 06:28:49" (1/1) ... [2020-10-28 18:28:49,530 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 06:28:49" (1/1) ... [2020-10-28 18:28:49,548 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 06:28:49" (1/1) ... [2020-10-28 18:28:49,554 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 06:28:49" (1/1) ... [2020-10-28 18:28:49,562 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-28 18:28:49,563 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-28 18:28:49,564 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-28 18:28:49,564 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-28 18:28:49,565 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 06:28:49" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-28 18:28:49,663 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-28 18:28:49,664 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-28 18:28:49,664 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-28 18:28:49,664 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-10-28 18:28:49,664 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-28 18:28:49,664 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-28 18:28:49,665 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-28 18:28:49,665 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-28 18:28:49,665 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-28 18:28:49,665 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-10-28 18:28:49,665 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-10-28 18:28:49,665 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2020-10-28 18:28:49,666 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-10-28 18:28:49,666 INFO L130 BoogieDeclarations]: Found specification of procedure read [2020-10-28 18:28:49,666 INFO L130 BoogieDeclarations]: Found specification of procedure write [2020-10-28 18:28:49,666 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2020-10-28 18:28:49,666 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2020-10-28 18:28:49,666 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2020-10-28 18:28:49,667 INFO L130 BoogieDeclarations]: Found specification of procedure init [2020-10-28 18:28:49,667 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-10-28 18:28:49,667 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-28 18:28:49,667 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-28 18:28:49,667 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-28 18:28:49,667 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-28 18:28:49,668 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-28 18:28:49,668 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-28 18:28:49,668 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-28 18:28:51,172 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-28 18:28:51,172 INFO L298 CfgBuilder]: Removed 0 assume(true) statements. [2020-10-28 18:28:51,174 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 06:28:51 BoogieIcfgContainer [2020-10-28 18:28:51,175 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-28 18:28:51,177 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-28 18:28:51,177 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-28 18:28:51,180 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-28 18:28:51,181 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.10 06:28:48" (1/3) ... [2020-10-28 18:28:51,181 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4c0bf1a0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 06:28:51, skipping insertion in model container [2020-10-28 18:28:51,182 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 06:28:49" (2/3) ... [2020-10-28 18:28:51,182 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4c0bf1a0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 06:28:51, skipping insertion in model container [2020-10-28 18:28:51,182 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 06:28:51" (3/3) ... [2020-10-28 18:28:51,184 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_lcr.3.ufo.BOUNDED-6.pals.c.v+sep-reducer.c [2020-10-28 18:28:51,195 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-28 18:28:51,201 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-28 18:28:51,213 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-28 18:28:51,242 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-28 18:28:51,242 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-28 18:28:51,242 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-28 18:28:51,242 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-28 18:28:51,243 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-28 18:28:51,243 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-28 18:28:51,243 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-28 18:28:51,243 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-28 18:28:51,267 INFO L276 IsEmpty]: Start isEmpty. Operand 288 states. [2020-10-28 18:28:51,280 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-10-28 18:28:51,280 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 18:28:51,281 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 18:28:51,282 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 18:28:51,288 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 18:28:51,288 INFO L82 PathProgramCache]: Analyzing trace with hash -439108496, now seen corresponding path program 1 times [2020-10-28 18:28:51,297 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 18:28:51,298 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [376476712] [2020-10-28 18:28:51,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 18:28:51,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:28:51,888 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:28:52,165 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:28:52,827 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:28:53,027 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:28:53,589 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:28:54,393 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:28:54,791 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:28:55,032 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:28:55,667 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:28:55,947 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:28:56,391 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:28:56,738 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:28:56,739 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 61 [2020-10-28 18:28:56,739 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 11 [2020-10-28 18:28:56,739 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5007 [2020-10-28 18:28:56,742 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:28:56,742 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:28:56,743 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-28 18:28:56,743 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 18:28:56,743 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 37 [2020-10-28 18:28:56,743 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-10-28 18:28:57,512 WARN L193 SmtUtils]: Spent 428.00 ms on a formula simplification that was a NOOP. DAG size: 211 [2020-10-28 18:28:57,521 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 18:28:57,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:28:57,540 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:28:57,557 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:28:57,557 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 18:28:57,558 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 18:28:57,558 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 20 [2020-10-28 18:28:57,558 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:28:57,558 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:28:57,558 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 18:28:57,559 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 18:28:57,559 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 18:28:57,559 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 18:28:57,598 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 18:28:57,599 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [376476712] [2020-10-28 18:28:57,602 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 18:28:57,602 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-10-28 18:28:57,603 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1762329981] [2020-10-28 18:28:57,609 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-28 18:28:57,609 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 18:28:57,629 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-28 18:28:57,630 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2020-10-28 18:28:57,633 INFO L87 Difference]: Start difference. First operand 288 states. Second operand 8 states. [2020-10-28 18:28:58,219 WARN L193 SmtUtils]: Spent 477.00 ms on a formula simplification that was a NOOP. DAG size: 218 [2020-10-28 18:29:00,589 WARN L193 SmtUtils]: Spent 440.00 ms on a formula simplification that was a NOOP. DAG size: 220 [2020-10-28 18:29:01,258 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 18:29:01,258 INFO L93 Difference]: Finished difference Result 559 states and 922 transitions. [2020-10-28 18:29:01,259 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-28 18:29:01,260 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 53 [2020-10-28 18:29:01,261 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 18:29:01,277 INFO L225 Difference]: With dead ends: 559 [2020-10-28 18:29:01,277 INFO L226 Difference]: Without dead ends: 460 [2020-10-28 18:29:01,282 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=47, Invalid=109, Unknown=0, NotChecked=0, Total=156 [2020-10-28 18:29:01,303 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 460 states. [2020-10-28 18:29:01,349 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 460 to 273. [2020-10-28 18:29:01,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 273 states. [2020-10-28 18:29:01,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 273 states to 273 states and 339 transitions. [2020-10-28 18:29:01,354 INFO L78 Accepts]: Start accepts. Automaton has 273 states and 339 transitions. Word has length 53 [2020-10-28 18:29:01,354 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 18:29:01,355 INFO L481 AbstractCegarLoop]: Abstraction has 273 states and 339 transitions. [2020-10-28 18:29:01,355 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-28 18:29:01,355 INFO L276 IsEmpty]: Start isEmpty. Operand 273 states and 339 transitions. [2020-10-28 18:29:01,358 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-10-28 18:29:01,359 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 18:29:01,359 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 18:29:01,359 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-28 18:29:01,359 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 18:29:01,360 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 18:29:01,360 INFO L82 PathProgramCache]: Analyzing trace with hash -1473566256, now seen corresponding path program 1 times [2020-10-28 18:29:01,360 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 18:29:01,361 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1753243000] [2020-10-28 18:29:01,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 18:29:01,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:29:01,419 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:29:01,477 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:29:01,588 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:29:02,035 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:29:02,375 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:29:02,995 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:29:03,407 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:29:04,256 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:29:04,365 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:29:06,414 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:29:06,414 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 61 [2020-10-28 18:29:06,414 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-28 18:29:06,415 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5017 [2020-10-28 18:29:06,415 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:29:06,415 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:29:06,415 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 18:29:06,415 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-28 18:29:06,416 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-28 18:29:06,416 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:29:06,958 WARN L193 SmtUtils]: Spent 380.00 ms on a formula simplification that was a NOOP. DAG size: 211 [2020-10-28 18:29:06,959 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 18:29:06,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:29:06,979 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:29:07,001 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:29:07,002 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 18:29:07,002 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 18:29:07,002 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 28 [2020-10-28 18:29:07,003 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:29:07,003 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:29:07,003 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 18:29:07,003 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 18:29:07,003 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-28 18:29:07,003 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:29:07,031 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 18:29:07,032 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1753243000] [2020-10-28 18:29:07,033 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 18:29:07,033 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-28 18:29:07,033 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [872569499] [2020-10-28 18:29:07,036 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-28 18:29:07,036 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 18:29:07,046 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-28 18:29:07,047 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-10-28 18:29:07,047 INFO L87 Difference]: Start difference. First operand 273 states and 339 transitions. Second operand 6 states. [2020-10-28 18:29:07,481 WARN L193 SmtUtils]: Spent 371.00 ms on a formula simplification that was a NOOP. DAG size: 220 [2020-10-28 18:29:08,855 WARN L193 SmtUtils]: Spent 385.00 ms on a formula simplification that was a NOOP. DAG size: 218 [2020-10-28 18:29:09,128 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 18:29:09,128 INFO L93 Difference]: Finished difference Result 448 states and 571 transitions. [2020-10-28 18:29:09,129 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-28 18:29:09,129 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 53 [2020-10-28 18:29:09,129 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 18:29:09,132 INFO L225 Difference]: With dead ends: 448 [2020-10-28 18:29:09,132 INFO L226 Difference]: Without dead ends: 314 [2020-10-28 18:29:09,134 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2020-10-28 18:29:09,135 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 314 states. [2020-10-28 18:29:09,183 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 314 to 289. [2020-10-28 18:29:09,183 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 289 states. [2020-10-28 18:29:09,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 289 states to 289 states and 373 transitions. [2020-10-28 18:29:09,188 INFO L78 Accepts]: Start accepts. Automaton has 289 states and 373 transitions. Word has length 53 [2020-10-28 18:29:09,189 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 18:29:09,189 INFO L481 AbstractCegarLoop]: Abstraction has 289 states and 373 transitions. [2020-10-28 18:29:09,189 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-28 18:29:09,189 INFO L276 IsEmpty]: Start isEmpty. Operand 289 states and 373 transitions. [2020-10-28 18:29:09,201 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-10-28 18:29:09,201 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 18:29:09,202 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 18:29:09,202 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-28 18:29:09,202 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 18:29:09,203 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 18:29:09,203 INFO L82 PathProgramCache]: Analyzing trace with hash -125995283, now seen corresponding path program 1 times [2020-10-28 18:29:09,203 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 18:29:09,203 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1405853719] [2020-10-28 18:29:09,203 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 18:29:09,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:29:09,262 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:29:09,320 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:29:09,374 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:29:09,615 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:29:09,962 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:29:10,238 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:29:10,343 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:29:11,307 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:29:11,370 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:29:14,279 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:29:14,280 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 61 [2020-10-28 18:29:14,280 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-28 18:29:14,280 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5037 [2020-10-28 18:29:14,280 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:29:14,280 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:29:14,281 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-28 18:29:14,281 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 18:29:14,281 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 36 [2020-10-28 18:29:14,281 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:29:14,769 WARN L193 SmtUtils]: Spent 334.00 ms on a formula simplification that was a NOOP. DAG size: 211 [2020-10-28 18:29:14,771 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 18:29:14,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:29:14,780 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:29:14,791 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:29:14,791 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 18:29:14,791 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 18:29:14,791 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12 [2020-10-28 18:29:14,792 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:29:14,792 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:29:14,792 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 18:29:14,792 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 18:29:14,792 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 18:29:14,792 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:29:14,813 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 18:29:14,814 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1405853719] [2020-10-28 18:29:14,814 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 18:29:14,814 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-10-28 18:29:14,814 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [926863364] [2020-10-28 18:29:14,815 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-28 18:29:14,815 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 18:29:14,816 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-28 18:29:14,816 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2020-10-28 18:29:14,816 INFO L87 Difference]: Start difference. First operand 289 states and 373 transitions. Second operand 8 states. [2020-10-28 18:29:15,236 WARN L193 SmtUtils]: Spent 353.00 ms on a formula simplification that was a NOOP. DAG size: 217 [2020-10-28 18:29:16,678 WARN L193 SmtUtils]: Spent 444.00 ms on a formula simplification that was a NOOP. DAG size: 219 [2020-10-28 18:29:17,197 WARN L193 SmtUtils]: Spent 374.00 ms on a formula simplification that was a NOOP. DAG size: 220 [2020-10-28 18:29:17,562 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 18:29:17,563 INFO L93 Difference]: Finished difference Result 499 states and 673 transitions. [2020-10-28 18:29:17,564 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-28 18:29:17,564 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 53 [2020-10-28 18:29:17,565 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 18:29:17,572 INFO L225 Difference]: With dead ends: 499 [2020-10-28 18:29:17,572 INFO L226 Difference]: Without dead ends: 486 [2020-10-28 18:29:17,573 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=58, Invalid=152, Unknown=0, NotChecked=0, Total=210 [2020-10-28 18:29:17,576 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 486 states. [2020-10-28 18:29:17,612 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 486 to 287. [2020-10-28 18:29:17,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 287 states. [2020-10-28 18:29:17,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 287 states to 287 states and 370 transitions. [2020-10-28 18:29:17,615 INFO L78 Accepts]: Start accepts. Automaton has 287 states and 370 transitions. Word has length 53 [2020-10-28 18:29:17,617 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 18:29:17,619 INFO L481 AbstractCegarLoop]: Abstraction has 287 states and 370 transitions. [2020-10-28 18:29:17,619 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-28 18:29:17,619 INFO L276 IsEmpty]: Start isEmpty. Operand 287 states and 370 transitions. [2020-10-28 18:29:17,621 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-10-28 18:29:17,621 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 18:29:17,621 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 18:29:17,621 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-28 18:29:17,621 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 18:29:17,622 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 18:29:17,622 INFO L82 PathProgramCache]: Analyzing trace with hash -381441494, now seen corresponding path program 1 times [2020-10-28 18:29:17,622 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 18:29:17,622 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2109047857] [2020-10-28 18:29:17,623 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 18:29:17,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:29:17,681 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:29:17,741 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:29:17,964 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:29:18,180 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:29:18,386 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:29:19,023 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:29:19,715 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:29:19,802 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:29:20,451 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:29:20,777 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:29:21,021 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:29:21,267 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:29:21,435 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:29:21,645 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:29:22,676 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:29:22,676 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 61 [2020-10-28 18:29:22,678 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 14 [2020-10-28 18:29:22,678 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5015 [2020-10-28 18:29:22,678 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:29:22,678 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:29:22,679 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-28 18:29:22,679 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 18:29:22,679 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 37 [2020-10-28 18:29:22,679 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:29:23,156 WARN L193 SmtUtils]: Spent 338.00 ms on a formula simplification that was a NOOP. DAG size: 211 [2020-10-28 18:29:23,158 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 18:29:23,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:29:23,177 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:29:23,187 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:29:23,187 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 18:29:23,187 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 18:29:23,187 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12 [2020-10-28 18:29:23,188 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:29:23,188 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:29:23,188 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 18:29:23,188 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 18:29:23,188 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 18:29:23,188 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:29:23,208 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 18:29:23,208 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2109047857] [2020-10-28 18:29:23,209 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 18:29:23,209 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-10-28 18:29:23,209 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [801711228] [2020-10-28 18:29:23,209 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-28 18:29:23,210 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 18:29:23,210 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-28 18:29:23,210 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2020-10-28 18:29:23,211 INFO L87 Difference]: Start difference. First operand 287 states and 370 transitions. Second operand 8 states. [2020-10-28 18:29:23,634 WARN L193 SmtUtils]: Spent 363.00 ms on a formula simplification that was a NOOP. DAG size: 218 [2020-10-28 18:29:24,954 WARN L193 SmtUtils]: Spent 404.00 ms on a formula simplification that was a NOOP. DAG size: 220 [2020-10-28 18:29:25,546 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 18:29:25,551 INFO L93 Difference]: Finished difference Result 504 states and 677 transitions. [2020-10-28 18:29:25,552 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-28 18:29:25,552 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 53 [2020-10-28 18:29:25,552 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 18:29:25,557 INFO L225 Difference]: With dead ends: 504 [2020-10-28 18:29:25,558 INFO L226 Difference]: Without dead ends: 481 [2020-10-28 18:29:25,559 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=47, Invalid=109, Unknown=0, NotChecked=0, Total=156 [2020-10-28 18:29:25,560 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 481 states. [2020-10-28 18:29:25,589 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 481 to 276. [2020-10-28 18:29:25,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 276 states. [2020-10-28 18:29:25,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 276 states to 276 states and 355 transitions. [2020-10-28 18:29:25,592 INFO L78 Accepts]: Start accepts. Automaton has 276 states and 355 transitions. Word has length 53 [2020-10-28 18:29:25,592 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 18:29:25,592 INFO L481 AbstractCegarLoop]: Abstraction has 276 states and 355 transitions. [2020-10-28 18:29:25,593 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-28 18:29:25,593 INFO L276 IsEmpty]: Start isEmpty. Operand 276 states and 355 transitions. [2020-10-28 18:29:25,594 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-10-28 18:29:25,594 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 18:29:25,594 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 18:29:25,594 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-28 18:29:25,595 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 18:29:25,595 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 18:29:25,595 INFO L82 PathProgramCache]: Analyzing trace with hash 1870976687, now seen corresponding path program 1 times [2020-10-28 18:29:25,596 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 18:29:25,596 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [956162959] [2020-10-28 18:29:25,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 18:29:25,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:29:25,645 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:29:25,692 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:29:25,763 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:29:25,847 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:29:26,626 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:29:27,030 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:29:27,135 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:29:27,231 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:29:28,204 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:29:28,359 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:29:28,806 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:29:29,165 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:29:29,245 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:29:30,601 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:29:30,645 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:29:30,645 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 63 [2020-10-28 18:29:30,646 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 14 [2020-10-28 18:29:30,646 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5018 [2020-10-28 18:29:30,646 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:29:30,646 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:29:30,646 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-28 18:29:30,646 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 18:29:30,647 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 35 [2020-10-28 18:29:30,647 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:29:31,100 WARN L193 SmtUtils]: Spent 355.00 ms on a formula simplification that was a NOOP. DAG size: 211 [2020-10-28 18:29:31,102 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 18:29:31,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:29:31,114 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:29:31,122 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:29:31,123 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 18:29:31,123 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 18:29:31,123 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-28 18:29:31,123 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:29:31,123 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:29:31,124 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 18:29:31,124 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 18:29:31,124 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 18:29:31,124 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:29:31,144 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 18:29:31,144 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [956162959] [2020-10-28 18:29:31,144 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 18:29:31,144 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-28 18:29:31,145 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [384179562] [2020-10-28 18:29:31,146 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-28 18:29:31,147 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 18:29:31,147 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-28 18:29:31,147 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-10-28 18:29:31,148 INFO L87 Difference]: Start difference. First operand 276 states and 355 transitions. Second operand 7 states. [2020-10-28 18:29:31,613 WARN L193 SmtUtils]: Spent 410.00 ms on a formula simplification that was a NOOP. DAG size: 221 [2020-10-28 18:29:32,966 WARN L193 SmtUtils]: Spent 376.00 ms on a formula simplification that was a NOOP. DAG size: 219 [2020-10-28 18:29:33,631 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 18:29:33,632 INFO L93 Difference]: Finished difference Result 606 states and 827 transitions. [2020-10-28 18:29:33,632 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-28 18:29:33,633 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 55 [2020-10-28 18:29:33,633 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 18:29:33,636 INFO L225 Difference]: With dead ends: 606 [2020-10-28 18:29:33,636 INFO L226 Difference]: Without dead ends: 492 [2020-10-28 18:29:33,637 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2020-10-28 18:29:33,639 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 492 states. [2020-10-28 18:29:33,663 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 492 to 276. [2020-10-28 18:29:33,663 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 276 states. [2020-10-28 18:29:33,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 276 states to 276 states and 354 transitions. [2020-10-28 18:29:33,665 INFO L78 Accepts]: Start accepts. Automaton has 276 states and 354 transitions. Word has length 55 [2020-10-28 18:29:33,665 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 18:29:33,665 INFO L481 AbstractCegarLoop]: Abstraction has 276 states and 354 transitions. [2020-10-28 18:29:33,665 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-28 18:29:33,666 INFO L276 IsEmpty]: Start isEmpty. Operand 276 states and 354 transitions. [2020-10-28 18:29:33,667 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-10-28 18:29:33,667 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 18:29:33,667 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 18:29:33,667 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-28 18:29:33,667 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 18:29:33,668 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 18:29:33,668 INFO L82 PathProgramCache]: Analyzing trace with hash -1224223678, now seen corresponding path program 1 times [2020-10-28 18:29:33,668 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 18:29:33,668 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1321297890] [2020-10-28 18:29:33,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 18:29:33,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:29:33,720 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:29:33,795 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:29:33,879 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:29:34,275 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:29:34,336 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:29:34,950 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:29:35,007 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:29:35,470 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:29:35,602 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:29:35,668 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:29:36,242 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:29:36,483 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:29:37,650 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:29:38,237 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:29:38,624 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:29:38,699 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:29:38,700 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 63 [2020-10-28 18:29:38,700 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 15 [2020-10-28 18:29:38,700 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-28 18:29:38,700 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:29:38,700 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:29:38,700 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-28 18:29:38,700 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 18:29:38,700 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 46 [2020-10-28 18:29:38,701 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:29:39,362 WARN L193 SmtUtils]: Spent 526.00 ms on a formula simplification that was a NOOP. DAG size: 211 [2020-10-28 18:29:39,363 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 18:29:39,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:29:39,377 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:29:39,397 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:29:39,397 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 18:29:39,397 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 18:29:39,398 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 23 [2020-10-28 18:29:39,398 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:29:39,398 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:29:39,399 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 18:29:39,399 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 18:29:39,399 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 18:29:39,399 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 18:29:39,429 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 18:29:39,430 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1321297890] [2020-10-28 18:29:39,431 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 18:29:39,431 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-10-28 18:29:39,431 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1865521972] [2020-10-28 18:29:39,432 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-28 18:29:39,432 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 18:29:39,432 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-28 18:29:39,433 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2020-10-28 18:29:39,433 INFO L87 Difference]: Start difference. First operand 276 states and 354 transitions. Second operand 9 states. [2020-10-28 18:29:39,920 WARN L193 SmtUtils]: Spent 391.00 ms on a formula simplification that was a NOOP. DAG size: 219 [2020-10-28 18:29:41,527 WARN L193 SmtUtils]: Spent 392.00 ms on a formula simplification that was a NOOP. DAG size: 218 [2020-10-28 18:29:42,067 WARN L193 SmtUtils]: Spent 416.00 ms on a formula simplification that was a NOOP. DAG size: 219 [2020-10-28 18:29:42,603 WARN L193 SmtUtils]: Spent 392.00 ms on a formula simplification that was a NOOP. DAG size: 212 [2020-10-28 18:29:43,463 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 18:29:43,463 INFO L93 Difference]: Finished difference Result 837 states and 1161 transitions. [2020-10-28 18:29:43,467 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-28 18:29:43,467 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 55 [2020-10-28 18:29:43,468 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 18:29:43,472 INFO L225 Difference]: With dead ends: 837 [2020-10-28 18:29:43,472 INFO L226 Difference]: Without dead ends: 748 [2020-10-28 18:29:43,474 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=113, Invalid=393, Unknown=0, NotChecked=0, Total=506 [2020-10-28 18:29:43,475 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 748 states. [2020-10-28 18:29:43,506 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 748 to 338. [2020-10-28 18:29:43,507 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 338 states. [2020-10-28 18:29:43,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 338 states to 338 states and 445 transitions. [2020-10-28 18:29:43,509 INFO L78 Accepts]: Start accepts. Automaton has 338 states and 445 transitions. Word has length 55 [2020-10-28 18:29:43,509 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 18:29:43,509 INFO L481 AbstractCegarLoop]: Abstraction has 338 states and 445 transitions. [2020-10-28 18:29:43,509 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-28 18:29:43,509 INFO L276 IsEmpty]: Start isEmpty. Operand 338 states and 445 transitions. [2020-10-28 18:29:43,510 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-10-28 18:29:43,510 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 18:29:43,511 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 18:29:43,511 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-28 18:29:43,511 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 18:29:43,511 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 18:29:43,512 INFO L82 PathProgramCache]: Analyzing trace with hash 1890648806, now seen corresponding path program 1 times [2020-10-28 18:29:43,512 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 18:29:43,512 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2065144661] [2020-10-28 18:29:43,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 18:29:43,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:29:43,550 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:29:43,598 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:29:43,674 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:29:43,870 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:29:43,913 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:29:44,060 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:29:44,409 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:29:44,877 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:29:44,999 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:29:45,966 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:29:46,194 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:29:46,394 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:29:46,783 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:29:46,985 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:29:47,397 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:29:47,686 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:29:48,511 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:29:48,541 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:29:48,541 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 63 [2020-10-28 18:29:48,542 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 17 [2020-10-28 18:29:48,542 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-28 18:29:48,542 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:29:48,542 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:29:48,542 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-28 18:29:48,543 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-28 18:29:48,543 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 50 [2020-10-28 18:29:48,543 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:29:48,992 WARN L193 SmtUtils]: Spent 332.00 ms on a formula simplification that was a NOOP. DAG size: 211 [2020-10-28 18:29:48,993 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 18:29:49,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:29:49,014 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:29:49,039 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:29:49,039 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 18:29:49,039 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 18:29:49,039 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 29 [2020-10-28 18:29:49,040 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:29:49,040 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:29:49,040 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 18:29:49,040 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 18:29:49,041 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-28 18:29:49,041 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 18:29:49,077 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 18:29:49,077 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2065144661] [2020-10-28 18:29:49,078 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 18:29:49,078 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-10-28 18:29:49,078 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [273050257] [2020-10-28 18:29:49,078 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-28 18:29:49,079 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 18:29:49,079 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-28 18:29:49,080 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2020-10-28 18:29:49,080 INFO L87 Difference]: Start difference. First operand 338 states and 445 transitions. Second operand 10 states. [2020-10-28 18:29:49,569 WARN L193 SmtUtils]: Spent 414.00 ms on a formula simplification that was a NOOP. DAG size: 223 [2020-10-28 18:29:50,906 WARN L193 SmtUtils]: Spent 423.00 ms on a formula simplification that was a NOOP. DAG size: 219 [2020-10-28 18:29:51,362 WARN L193 SmtUtils]: Spent 356.00 ms on a formula simplification that was a NOOP. DAG size: 215 [2020-10-28 18:29:52,552 WARN L193 SmtUtils]: Spent 380.00 ms on a formula simplification that was a NOOP. DAG size: 217 [2020-10-28 18:29:52,840 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 18:29:52,840 INFO L93 Difference]: Finished difference Result 1045 states and 1498 transitions. [2020-10-28 18:29:52,841 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-28 18:29:52,841 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 55 [2020-10-28 18:29:52,841 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 18:29:52,846 INFO L225 Difference]: With dead ends: 1045 [2020-10-28 18:29:52,846 INFO L226 Difference]: Without dead ends: 862 [2020-10-28 18:29:52,847 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 192 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=193, Invalid=619, Unknown=0, NotChecked=0, Total=812 [2020-10-28 18:29:52,849 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 862 states. [2020-10-28 18:29:52,900 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 862 to 458. [2020-10-28 18:29:52,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 458 states. [2020-10-28 18:29:52,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 458 states to 458 states and 629 transitions. [2020-10-28 18:29:52,903 INFO L78 Accepts]: Start accepts. Automaton has 458 states and 629 transitions. Word has length 55 [2020-10-28 18:29:52,903 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 18:29:52,903 INFO L481 AbstractCegarLoop]: Abstraction has 458 states and 629 transitions. [2020-10-28 18:29:52,904 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-28 18:29:52,904 INFO L276 IsEmpty]: Start isEmpty. Operand 458 states and 629 transitions. [2020-10-28 18:29:52,905 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-10-28 18:29:52,905 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 18:29:52,905 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 18:29:52,905 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-28 18:29:52,905 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 18:29:52,906 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 18:29:52,906 INFO L82 PathProgramCache]: Analyzing trace with hash 1919882281, now seen corresponding path program 1 times [2020-10-28 18:29:52,906 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 18:29:52,907 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [560687387] [2020-10-28 18:29:52,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 18:29:52,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:29:52,953 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:29:53,053 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:29:53,166 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:29:53,381 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:29:53,597 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:29:53,686 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:29:53,741 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:29:53,874 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:29:54,234 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:29:54,379 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:29:54,622 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:29:54,701 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:29:54,762 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:29:55,139 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:29:55,206 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:29:55,444 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:29:55,658 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:29:56,203 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:29:56,908 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:29:56,989 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:29:57,692 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:29:57,942 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:29:57,942 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 63 [2020-10-28 18:29:57,942 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 21 [2020-10-28 18:29:57,942 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-10-28 18:29:57,942 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:29:57,942 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:29:57,943 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-28 18:29:57,943 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-28 18:29:57,943 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 46 [2020-10-28 18:29:57,943 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:29:58,420 WARN L193 SmtUtils]: Spent 362.00 ms on a formula simplification that was a NOOP. DAG size: 211 [2020-10-28 18:29:58,421 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 18:29:58,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:29:58,436 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:29:58,450 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:29:58,451 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 18:29:58,451 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 18:29:58,451 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 18 [2020-10-28 18:29:58,451 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:29:58,451 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:29:58,451 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 18:29:58,451 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 18:29:58,451 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-28 18:29:58,451 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:29:58,474 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 18:29:58,475 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [560687387] [2020-10-28 18:29:58,475 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 18:29:58,475 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-10-28 18:29:58,475 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1630155566] [2020-10-28 18:29:58,476 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-28 18:29:58,476 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 18:29:58,476 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-28 18:29:58,477 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2020-10-28 18:29:58,477 INFO L87 Difference]: Start difference. First operand 458 states and 629 transitions. Second operand 10 states. [2020-10-28 18:29:58,984 WARN L193 SmtUtils]: Spent 417.00 ms on a formula simplification that was a NOOP. DAG size: 224 [2020-10-28 18:30:00,273 WARN L193 SmtUtils]: Spent 460.00 ms on a formula simplification that was a NOOP. DAG size: 220 [2020-10-28 18:30:00,723 WARN L193 SmtUtils]: Spent 394.00 ms on a formula simplification that was a NOOP. DAG size: 218 [2020-10-28 18:30:01,440 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 18:30:01,441 INFO L93 Difference]: Finished difference Result 1408 states and 2038 transitions. [2020-10-28 18:30:01,441 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-28 18:30:01,441 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 55 [2020-10-28 18:30:01,442 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 18:30:01,448 INFO L225 Difference]: With dead ends: 1408 [2020-10-28 18:30:01,448 INFO L226 Difference]: Without dead ends: 1105 [2020-10-28 18:30:01,450 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 119 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=160, Invalid=440, Unknown=0, NotChecked=0, Total=600 [2020-10-28 18:30:01,452 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1105 states. [2020-10-28 18:30:01,544 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1105 to 726. [2020-10-28 18:30:01,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 726 states. [2020-10-28 18:30:01,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 726 states to 726 states and 1028 transitions. [2020-10-28 18:30:01,549 INFO L78 Accepts]: Start accepts. Automaton has 726 states and 1028 transitions. Word has length 55 [2020-10-28 18:30:01,549 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 18:30:01,550 INFO L481 AbstractCegarLoop]: Abstraction has 726 states and 1028 transitions. [2020-10-28 18:30:01,550 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-28 18:30:01,550 INFO L276 IsEmpty]: Start isEmpty. Operand 726 states and 1028 transitions. [2020-10-28 18:30:01,551 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-10-28 18:30:01,551 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 18:30:01,551 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 18:30:01,551 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-28 18:30:01,552 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 18:30:01,552 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 18:30:01,552 INFO L82 PathProgramCache]: Analyzing trace with hash -295878213, now seen corresponding path program 1 times [2020-10-28 18:30:01,552 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 18:30:01,553 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [374554191] [2020-10-28 18:30:01,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 18:30:01,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:30:01,604 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:30:01,669 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:30:01,729 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:30:02,105 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:30:02,243 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:30:02,370 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:30:02,604 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:30:02,781 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:30:02,942 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:30:03,315 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:30:03,816 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:30:03,961 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:30:04,216 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:30:05,268 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:30:05,357 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:30:05,599 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:30:05,698 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:30:06,587 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:30:06,587 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 64 [2020-10-28 18:30:06,587 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 17 [2020-10-28 18:30:06,587 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-10-28 18:30:06,588 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:30:06,588 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:30:06,588 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-28 18:30:06,588 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 18:30:06,588 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 46 [2020-10-28 18:30:06,588 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:30:07,047 WARN L193 SmtUtils]: Spent 356.00 ms on a formula simplification that was a NOOP. DAG size: 211 [2020-10-28 18:30:07,048 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 18:30:07,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:30:07,055 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:30:07,061 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:30:07,061 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 18:30:07,061 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 18:30:07,061 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-28 18:30:07,061 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:30:07,061 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:30:07,062 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 18:30:07,062 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 18:30:07,062 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 18:30:07,062 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:30:07,080 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 18:30:07,080 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [374554191] [2020-10-28 18:30:07,080 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 18:30:07,080 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-10-28 18:30:07,081 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [73613058] [2020-10-28 18:30:07,081 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-28 18:30:07,081 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 18:30:07,082 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-28 18:30:07,082 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2020-10-28 18:30:07,082 INFO L87 Difference]: Start difference. First operand 726 states and 1028 transitions. Second operand 9 states. [2020-10-28 18:30:07,520 WARN L193 SmtUtils]: Spent 374.00 ms on a formula simplification that was a NOOP. DAG size: 218 [2020-10-28 18:30:08,615 WARN L193 SmtUtils]: Spent 396.00 ms on a formula simplification that was a NOOP. DAG size: 220 [2020-10-28 18:30:09,052 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 18:30:09,052 INFO L93 Difference]: Finished difference Result 1070 states and 1546 transitions. [2020-10-28 18:30:09,053 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-28 18:30:09,053 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 56 [2020-10-28 18:30:09,053 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 18:30:09,057 INFO L225 Difference]: With dead ends: 1070 [2020-10-28 18:30:09,057 INFO L226 Difference]: Without dead ends: 742 [2020-10-28 18:30:09,058 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=56, Invalid=154, Unknown=0, NotChecked=0, Total=210 [2020-10-28 18:30:09,060 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 742 states. [2020-10-28 18:30:09,145 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 742 to 725. [2020-10-28 18:30:09,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 725 states. [2020-10-28 18:30:09,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 725 states to 725 states and 1026 transitions. [2020-10-28 18:30:09,149 INFO L78 Accepts]: Start accepts. Automaton has 725 states and 1026 transitions. Word has length 56 [2020-10-28 18:30:09,149 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 18:30:09,149 INFO L481 AbstractCegarLoop]: Abstraction has 725 states and 1026 transitions. [2020-10-28 18:30:09,149 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-28 18:30:09,149 INFO L276 IsEmpty]: Start isEmpty. Operand 725 states and 1026 transitions. [2020-10-28 18:30:09,150 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-10-28 18:30:09,150 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 18:30:09,150 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 18:30:09,151 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-28 18:30:09,151 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 18:30:09,151 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 18:30:09,151 INFO L82 PathProgramCache]: Analyzing trace with hash 1471984872, now seen corresponding path program 1 times [2020-10-28 18:30:09,152 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 18:30:09,152 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [343806432] [2020-10-28 18:30:09,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 18:30:09,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:30:09,197 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:30:09,256 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:30:09,322 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:30:09,386 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:30:09,468 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:30:09,822 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:30:10,008 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:30:10,363 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:30:11,920 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:30:12,160 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:30:12,332 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:30:12,807 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:30:13,961 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:30:14,179 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:30:14,179 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 65 [2020-10-28 18:30:14,179 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 13 [2020-10-28 18:30:14,180 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-28 18:30:14,180 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:30:14,180 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:30:14,180 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-28 18:30:14,180 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 18:30:14,180 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 46 [2020-10-28 18:30:14,180 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:30:14,665 WARN L193 SmtUtils]: Spent 362.00 ms on a formula simplification that was a NOOP. DAG size: 211 [2020-10-28 18:30:14,666 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 18:30:14,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:30:14,674 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:30:14,680 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:30:14,680 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 18:30:14,680 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 18:30:14,680 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-28 18:30:14,681 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:30:14,681 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:30:14,681 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 18:30:14,681 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 18:30:14,681 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 18:30:14,681 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:30:14,696 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 18:30:14,696 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [343806432] [2020-10-28 18:30:14,697 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 18:30:14,697 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-10-28 18:30:14,697 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [121454037] [2020-10-28 18:30:14,697 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-28 18:30:14,698 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 18:30:14,698 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-28 18:30:14,698 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2020-10-28 18:30:14,698 INFO L87 Difference]: Start difference. First operand 725 states and 1026 transitions. Second operand 9 states. [2020-10-28 18:30:15,128 WARN L193 SmtUtils]: Spent 373.00 ms on a formula simplification that was a NOOP. DAG size: 219 [2020-10-28 18:30:16,271 WARN L193 SmtUtils]: Spent 443.00 ms on a formula simplification that was a NOOP. DAG size: 221 [2020-10-28 18:30:16,790 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 18:30:16,791 INFO L93 Difference]: Finished difference Result 1065 states and 1540 transitions. [2020-10-28 18:30:16,791 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-28 18:30:16,791 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 57 [2020-10-28 18:30:16,791 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 18:30:16,797 INFO L225 Difference]: With dead ends: 1065 [2020-10-28 18:30:16,797 INFO L226 Difference]: Without dead ends: 1058 [2020-10-28 18:30:16,798 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=56, Invalid=154, Unknown=0, NotChecked=0, Total=210 [2020-10-28 18:30:16,800 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1058 states. [2020-10-28 18:30:16,892 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1058 to 720. [2020-10-28 18:30:16,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 720 states. [2020-10-28 18:30:16,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 720 states to 720 states and 1015 transitions. [2020-10-28 18:30:16,896 INFO L78 Accepts]: Start accepts. Automaton has 720 states and 1015 transitions. Word has length 57 [2020-10-28 18:30:16,896 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 18:30:16,896 INFO L481 AbstractCegarLoop]: Abstraction has 720 states and 1015 transitions. [2020-10-28 18:30:16,896 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-28 18:30:16,896 INFO L276 IsEmpty]: Start isEmpty. Operand 720 states and 1015 transitions. [2020-10-28 18:30:16,897 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-10-28 18:30:16,897 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 18:30:16,898 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 18:30:16,898 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-28 18:30:16,898 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 18:30:16,898 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 18:30:16,898 INFO L82 PathProgramCache]: Analyzing trace with hash -598517054, now seen corresponding path program 1 times [2020-10-28 18:30:16,899 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 18:30:16,899 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1892445032] [2020-10-28 18:30:16,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 18:30:16,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:30:16,944 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:30:16,989 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:30:17,025 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:30:17,378 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:30:17,431 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:30:17,511 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:30:18,163 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:30:18,490 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:30:18,535 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:30:18,729 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:30:18,982 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:30:19,053 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:30:19,502 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:30:21,674 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:30:21,948 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:30:21,948 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 65 [2020-10-28 18:30:21,948 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 14 [2020-10-28 18:30:21,948 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5022 [2020-10-28 18:30:21,948 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:30:21,948 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:30:21,948 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-28 18:30:21,948 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-28 18:30:21,949 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 50 [2020-10-28 18:30:21,949 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:30:22,434 WARN L193 SmtUtils]: Spent 372.00 ms on a formula simplification that was a NOOP. DAG size: 211 [2020-10-28 18:30:22,435 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 18:30:22,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:30:22,450 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:30:22,468 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:30:22,469 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 18:30:22,469 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 18:30:22,469 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 23 [2020-10-28 18:30:22,469 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:30:22,469 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:30:22,469 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 18:30:22,469 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 18:30:22,469 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-28 18:30:22,469 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:30:22,486 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 18:30:22,487 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1892445032] [2020-10-28 18:30:22,487 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 18:30:22,487 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-10-28 18:30:22,488 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2112394066] [2020-10-28 18:30:22,488 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-28 18:30:22,489 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 18:30:22,489 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-28 18:30:22,489 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2020-10-28 18:30:22,490 INFO L87 Difference]: Start difference. First operand 720 states and 1015 transitions. Second operand 10 states. [2020-10-28 18:30:23,002 WARN L193 SmtUtils]: Spent 432.00 ms on a formula simplification that was a NOOP. DAG size: 223 [2020-10-28 18:30:24,242 WARN L193 SmtUtils]: Spent 421.00 ms on a formula simplification that was a NOOP. DAG size: 219 [2020-10-28 18:30:24,656 WARN L193 SmtUtils]: Spent 383.00 ms on a formula simplification that was a NOOP. DAG size: 215 [2020-10-28 18:30:25,701 WARN L193 SmtUtils]: Spent 396.00 ms on a formula simplification that was a NOOP. DAG size: 217 [2020-10-28 18:30:25,796 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 18:30:25,796 INFO L93 Difference]: Finished difference Result 1004 states and 1427 transitions. [2020-10-28 18:30:25,797 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-28 18:30:25,797 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 57 [2020-10-28 18:30:25,797 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 18:30:25,802 INFO L225 Difference]: With dead ends: 1004 [2020-10-28 18:30:25,802 INFO L226 Difference]: Without dead ends: 995 [2020-10-28 18:30:25,803 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 115 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=146, Invalid=406, Unknown=0, NotChecked=0, Total=552 [2020-10-28 18:30:25,804 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 995 states. [2020-10-28 18:30:25,897 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 995 to 720. [2020-10-28 18:30:25,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 720 states. [2020-10-28 18:30:25,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 720 states to 720 states and 1013 transitions. [2020-10-28 18:30:25,901 INFO L78 Accepts]: Start accepts. Automaton has 720 states and 1013 transitions. Word has length 57 [2020-10-28 18:30:25,901 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 18:30:25,901 INFO L481 AbstractCegarLoop]: Abstraction has 720 states and 1013 transitions. [2020-10-28 18:30:25,901 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-28 18:30:25,901 INFO L276 IsEmpty]: Start isEmpty. Operand 720 states and 1013 transitions. [2020-10-28 18:30:25,902 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-10-28 18:30:25,902 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 18:30:25,902 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 18:30:25,903 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-28 18:30:25,903 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 18:30:25,903 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 18:30:25,903 INFO L82 PathProgramCache]: Analyzing trace with hash -2091171779, now seen corresponding path program 1 times [2020-10-28 18:30:25,903 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 18:30:25,904 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [378231588] [2020-10-28 18:30:25,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 18:30:25,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:30:25,952 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:30:26,005 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:30:26,084 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:30:26,313 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:30:26,509 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:30:26,572 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:30:26,766 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:30:26,940 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:30:29,480 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:30:29,481 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 65 [2020-10-28 18:30:29,481 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-28 18:30:29,481 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3548 [2020-10-28 18:30:29,481 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:30:29,481 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:30:29,481 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-28 18:30:29,481 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 18:30:29,481 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 48 [2020-10-28 18:30:29,481 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:30:30,249 WARN L193 SmtUtils]: Spent 368.00 ms on a formula simplification that was a NOOP. DAG size: 211 [2020-10-28 18:30:30,251 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 18:30:30,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:30:30,258 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:30:30,266 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:30:30,266 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 18:30:30,266 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 18:30:30,266 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-28 18:30:30,266 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:30:30,266 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:30:30,266 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 18:30:30,267 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 18:30:30,267 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 18:30:30,267 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:30:30,284 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 18:30:30,284 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [378231588] [2020-10-28 18:30:30,284 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 18:30:30,284 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2020-10-28 18:30:30,284 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [474727998] [2020-10-28 18:30:30,285 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-28 18:30:30,285 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 18:30:30,285 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-28 18:30:30,285 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=128, Unknown=0, NotChecked=0, Total=156 [2020-10-28 18:30:30,286 INFO L87 Difference]: Start difference. First operand 720 states and 1013 transitions. Second operand 13 states. [2020-10-28 18:30:30,790 WARN L193 SmtUtils]: Spent 433.00 ms on a formula simplification that was a NOOP. DAG size: 219 [2020-10-28 18:30:32,442 WARN L193 SmtUtils]: Spent 407.00 ms on a formula simplification that was a NOOP. DAG size: 218 [2020-10-28 18:30:32,921 WARN L193 SmtUtils]: Spent 420.00 ms on a formula simplification that was a NOOP. DAG size: 221 [2020-10-28 18:30:33,461 WARN L193 SmtUtils]: Spent 397.00 ms on a formula simplification that was a NOOP. DAG size: 217 [2020-10-28 18:30:33,946 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 18:30:33,946 INFO L93 Difference]: Finished difference Result 749 states and 1041 transitions. [2020-10-28 18:30:33,947 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-28 18:30:33,947 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 57 [2020-10-28 18:30:33,947 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 18:30:33,951 INFO L225 Difference]: With dead ends: 749 [2020-10-28 18:30:33,951 INFO L226 Difference]: Without dead ends: 744 [2020-10-28 18:30:33,952 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 145 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=151, Invalid=661, Unknown=0, NotChecked=0, Total=812 [2020-10-28 18:30:33,954 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 744 states. [2020-10-28 18:30:34,064 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 744 to 713. [2020-10-28 18:30:34,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 713 states. [2020-10-28 18:30:34,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 713 states to 713 states and 1004 transitions. [2020-10-28 18:30:34,068 INFO L78 Accepts]: Start accepts. Automaton has 713 states and 1004 transitions. Word has length 57 [2020-10-28 18:30:34,068 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 18:30:34,068 INFO L481 AbstractCegarLoop]: Abstraction has 713 states and 1004 transitions. [2020-10-28 18:30:34,068 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-28 18:30:34,068 INFO L276 IsEmpty]: Start isEmpty. Operand 713 states and 1004 transitions. [2020-10-28 18:30:34,069 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-10-28 18:30:34,069 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 18:30:34,069 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 18:30:34,070 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-28 18:30:34,070 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 18:30:34,070 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 18:30:34,070 INFO L82 PathProgramCache]: Analyzing trace with hash 1797111268, now seen corresponding path program 1 times [2020-10-28 18:30:34,071 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 18:30:34,071 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [757303084] [2020-10-28 18:30:34,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 18:30:34,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:30:34,125 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:30:34,218 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:30:34,411 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:30:34,545 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:30:34,854 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:30:34,940 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:30:35,054 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:30:35,179 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:30:37,096 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:30:37,096 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 65 [2020-10-28 18:30:37,097 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-28 18:30:37,097 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2994 [2020-10-28 18:30:37,097 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:30:37,097 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:30:37,097 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-28 18:30:37,097 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 18:30:37,097 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 48 [2020-10-28 18:30:37,097 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:30:37,732 WARN L193 SmtUtils]: Spent 383.00 ms on a formula simplification that was a NOOP. DAG size: 211 [2020-10-28 18:30:37,734 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 18:30:37,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:30:37,742 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:30:37,756 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:30:37,756 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 18:30:37,757 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 18:30:37,757 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 16 [2020-10-28 18:30:37,757 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:30:37,757 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:30:37,757 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 18:30:37,757 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 18:30:37,757 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 18:30:37,758 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:30:37,800 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 18:30:37,800 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [757303084] [2020-10-28 18:30:37,800 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 18:30:37,800 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-10-28 18:30:37,801 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1059789527] [2020-10-28 18:30:37,801 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-28 18:30:37,801 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 18:30:37,802 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-28 18:30:37,802 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2020-10-28 18:30:37,802 INFO L87 Difference]: Start difference. First operand 713 states and 1004 transitions. Second operand 9 states. [2020-10-28 18:30:38,302 WARN L193 SmtUtils]: Spent 437.00 ms on a formula simplification that was a NOOP. DAG size: 230 [2020-10-28 18:30:39,480 WARN L193 SmtUtils]: Spent 432.00 ms on a formula simplification that was a NOOP. DAG size: 228 [2020-10-28 18:30:39,911 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 18:30:39,911 INFO L93 Difference]: Finished difference Result 1051 states and 1516 transitions. [2020-10-28 18:30:39,911 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-28 18:30:39,911 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 57 [2020-10-28 18:30:39,912 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 18:30:39,914 INFO L225 Difference]: With dead ends: 1051 [2020-10-28 18:30:39,914 INFO L226 Difference]: Without dead ends: 719 [2020-10-28 18:30:39,916 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182 [2020-10-28 18:30:39,917 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 719 states. [2020-10-28 18:30:40,020 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 719 to 701. [2020-10-28 18:30:40,021 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 701 states. [2020-10-28 18:30:40,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 701 states to 701 states and 986 transitions. [2020-10-28 18:30:40,024 INFO L78 Accepts]: Start accepts. Automaton has 701 states and 986 transitions. Word has length 57 [2020-10-28 18:30:40,024 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 18:30:40,024 INFO L481 AbstractCegarLoop]: Abstraction has 701 states and 986 transitions. [2020-10-28 18:30:40,024 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-28 18:30:40,025 INFO L276 IsEmpty]: Start isEmpty. Operand 701 states and 986 transitions. [2020-10-28 18:30:40,025 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-10-28 18:30:40,026 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 18:30:40,026 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 18:30:40,026 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-28 18:30:40,026 INFO L429 AbstractCegarLoop]: === Iteration 14 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 18:30:40,026 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 18:30:40,027 INFO L82 PathProgramCache]: Analyzing trace with hash -2105554335, now seen corresponding path program 1 times [2020-10-28 18:30:40,027 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 18:30:40,027 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1085516164] [2020-10-28 18:30:40,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 18:30:40,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:30:40,084 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:30:40,182 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:30:40,239 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:30:40,731 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:30:41,030 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:30:41,266 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:30:41,470 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:30:42,394 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:30:43,685 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:30:43,685 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 65 [2020-10-28 18:30:43,685 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-28 18:30:43,685 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3624 [2020-10-28 18:30:43,685 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:30:43,685 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:30:43,685 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-28 18:30:43,685 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 18:30:43,685 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 42 [2020-10-28 18:30:43,685 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:30:44,161 WARN L193 SmtUtils]: Spent 368.00 ms on a formula simplification that was a NOOP. DAG size: 211 [2020-10-28 18:30:44,162 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 18:30:44,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:30:44,172 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:30:44,178 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:30:44,179 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 18:30:44,179 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 18:30:44,179 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-28 18:30:44,179 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:30:44,179 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:30:44,180 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 18:30:44,180 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 18:30:44,180 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 18:30:44,180 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:30:44,197 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 18:30:44,197 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1085516164] [2020-10-28 18:30:44,198 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 18:30:44,198 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-10-28 18:30:44,198 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [760945714] [2020-10-28 18:30:44,198 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-28 18:30:44,199 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 18:30:44,199 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-28 18:30:44,199 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2020-10-28 18:30:44,199 INFO L87 Difference]: Start difference. First operand 701 states and 986 transitions. Second operand 9 states. [2020-10-28 18:30:44,617 WARN L193 SmtUtils]: Spent 357.00 ms on a formula simplification that was a NOOP. DAG size: 218 [2020-10-28 18:30:45,584 WARN L193 SmtUtils]: Spent 409.00 ms on a formula simplification that was a NOOP. DAG size: 220 [2020-10-28 18:30:45,951 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 18:30:45,951 INFO L93 Difference]: Finished difference Result 718 states and 1002 transitions. [2020-10-28 18:30:45,952 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-28 18:30:45,952 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 57 [2020-10-28 18:30:45,952 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 18:30:45,955 INFO L225 Difference]: With dead ends: 718 [2020-10-28 18:30:45,955 INFO L226 Difference]: Without dead ends: 706 [2020-10-28 18:30:45,956 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=55, Invalid=155, Unknown=0, NotChecked=0, Total=210 [2020-10-28 18:30:45,957 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 706 states. [2020-10-28 18:30:46,052 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 706 to 691. [2020-10-28 18:30:46,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 691 states. [2020-10-28 18:30:46,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 691 states to 691 states and 974 transitions. [2020-10-28 18:30:46,056 INFO L78 Accepts]: Start accepts. Automaton has 691 states and 974 transitions. Word has length 57 [2020-10-28 18:30:46,056 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 18:30:46,056 INFO L481 AbstractCegarLoop]: Abstraction has 691 states and 974 transitions. [2020-10-28 18:30:46,056 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-28 18:30:46,056 INFO L276 IsEmpty]: Start isEmpty. Operand 691 states and 974 transitions. [2020-10-28 18:30:46,057 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2020-10-28 18:30:46,057 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 18:30:46,058 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] [2020-10-28 18:30:46,058 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-28 18:30:46,058 INFO L429 AbstractCegarLoop]: === Iteration 15 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 18:30:46,058 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 18:30:46,059 INFO L82 PathProgramCache]: Analyzing trace with hash 1119680989, now seen corresponding path program 1 times [2020-10-28 18:30:46,060 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 18:30:46,063 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [268951875] [2020-10-28 18:30:46,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 18:30:46,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:30:46,117 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:30:46,198 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:30:46,271 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:30:46,876 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:30:46,952 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:30:48,885 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:30:48,886 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 67 [2020-10-28 18:30:48,886 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-28 18:30:48,886 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2789 [2020-10-28 18:30:48,886 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:30:48,886 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:30:48,886 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-28 18:30:48,886 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-28 18:30:48,886 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 42 [2020-10-28 18:30:48,886 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:30:49,364 WARN L193 SmtUtils]: Spent 378.00 ms on a formula simplification that was a NOOP. DAG size: 211 [2020-10-28 18:30:49,365 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 18:30:49,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:30:49,377 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:30:49,391 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:30:49,391 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 18:30:49,391 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 18:30:49,391 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 17 [2020-10-28 18:30:49,391 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:30:49,392 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:30:49,392 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 18:30:49,392 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 18:30:49,392 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-28 18:30:49,392 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:30:49,408 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 18:30:49,408 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [268951875] [2020-10-28 18:30:49,408 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 18:30:49,408 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-10-28 18:30:49,409 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1173412644] [2020-10-28 18:30:49,409 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-28 18:30:49,409 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 18:30:49,409 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-28 18:30:49,410 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2020-10-28 18:30:49,410 INFO L87 Difference]: Start difference. First operand 691 states and 974 transitions. Second operand 9 states. [2020-10-28 18:30:49,916 WARN L193 SmtUtils]: Spent 436.00 ms on a formula simplification that was a NOOP. DAG size: 222 [2020-10-28 18:30:50,919 WARN L193 SmtUtils]: Spent 417.00 ms on a formula simplification that was a NOOP. DAG size: 220 [2020-10-28 18:30:51,348 WARN L193 SmtUtils]: Spent 379.00 ms on a formula simplification that was a NOOP. DAG size: 218 [2020-10-28 18:30:51,738 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 18:30:51,738 INFO L93 Difference]: Finished difference Result 1229 states and 1775 transitions. [2020-10-28 18:30:51,739 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-28 18:30:51,739 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 59 [2020-10-28 18:30:51,739 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 18:30:51,741 INFO L225 Difference]: With dead ends: 1229 [2020-10-28 18:30:51,741 INFO L226 Difference]: Without dead ends: 690 [2020-10-28 18:30:51,743 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=91, Invalid=215, Unknown=0, NotChecked=0, Total=306 [2020-10-28 18:30:51,744 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 690 states. [2020-10-28 18:30:51,827 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 690 to 507. [2020-10-28 18:30:51,828 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 507 states. [2020-10-28 18:30:51,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 507 states to 507 states and 702 transitions. [2020-10-28 18:30:51,830 INFO L78 Accepts]: Start accepts. Automaton has 507 states and 702 transitions. Word has length 59 [2020-10-28 18:30:51,830 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 18:30:51,830 INFO L481 AbstractCegarLoop]: Abstraction has 507 states and 702 transitions. [2020-10-28 18:30:51,830 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-28 18:30:51,831 INFO L276 IsEmpty]: Start isEmpty. Operand 507 states and 702 transitions. [2020-10-28 18:30:51,831 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2020-10-28 18:30:51,831 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 18:30:51,832 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] [2020-10-28 18:30:51,832 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-28 18:30:51,832 INFO L429 AbstractCegarLoop]: === Iteration 16 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 18:30:51,832 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 18:30:51,833 INFO L82 PathProgramCache]: Analyzing trace with hash 1782412450, now seen corresponding path program 1 times [2020-10-28 18:30:51,833 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 18:30:51,833 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1288204703] [2020-10-28 18:30:51,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 18:30:51,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:30:51,880 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:30:51,934 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:30:52,103 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:30:52,152 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:30:52,189 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:30:54,020 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:30:54,020 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 67 [2020-10-28 18:30:54,020 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-28 18:30:54,020 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2159 [2020-10-28 18:30:54,020 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:30:54,020 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:30:54,021 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-28 18:30:54,021 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-28 18:30:54,021 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 52 [2020-10-28 18:30:54,021 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:30:54,524 WARN L193 SmtUtils]: Spent 374.00 ms on a formula simplification that was a NOOP. DAG size: 211 [2020-10-28 18:30:54,525 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 18:30:54,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:30:54,539 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:30:54,562 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:30:54,562 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 18:30:54,562 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 18:30:54,562 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 27 [2020-10-28 18:30:54,562 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:30:54,562 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:30:54,563 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 18:30:54,563 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 18:30:54,563 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-28 18:30:54,563 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:30:54,589 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 18:30:54,589 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1288204703] [2020-10-28 18:30:54,589 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 18:30:54,589 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-10-28 18:30:54,589 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1947954846] [2020-10-28 18:30:54,590 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-28 18:30:54,590 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 18:30:54,591 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-28 18:30:54,591 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2020-10-28 18:30:54,591 INFO L87 Difference]: Start difference. First operand 507 states and 702 transitions. Second operand 10 states. [2020-10-28 18:30:55,091 WARN L193 SmtUtils]: Spent 424.00 ms on a formula simplification that was a NOOP. DAG size: 222 [2020-10-28 18:30:56,184 WARN L193 SmtUtils]: Spent 403.00 ms on a formula simplification that was a NOOP. DAG size: 218 [2020-10-28 18:30:56,614 WARN L193 SmtUtils]: Spent 395.00 ms on a formula simplification that was a NOOP. DAG size: 215 [2020-10-28 18:30:57,467 WARN L193 SmtUtils]: Spent 382.00 ms on a formula simplification that was a NOOP. DAG size: 217 [2020-10-28 18:30:57,549 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 18:30:57,549 INFO L93 Difference]: Finished difference Result 715 states and 999 transitions. [2020-10-28 18:30:57,549 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-28 18:30:57,549 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 59 [2020-10-28 18:30:57,550 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 18:30:57,552 INFO L225 Difference]: With dead ends: 715 [2020-10-28 18:30:57,552 INFO L226 Difference]: Without dead ends: 706 [2020-10-28 18:30:57,553 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 122 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=140, Invalid=412, Unknown=0, NotChecked=0, Total=552 [2020-10-28 18:30:57,554 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 706 states. [2020-10-28 18:30:57,639 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 706 to 507. [2020-10-28 18:30:57,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 507 states. [2020-10-28 18:30:57,641 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 507 states to 507 states and 701 transitions. [2020-10-28 18:30:57,642 INFO L78 Accepts]: Start accepts. Automaton has 507 states and 701 transitions. Word has length 59 [2020-10-28 18:30:57,642 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 18:30:57,642 INFO L481 AbstractCegarLoop]: Abstraction has 507 states and 701 transitions. [2020-10-28 18:30:57,642 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-28 18:30:57,642 INFO L276 IsEmpty]: Start isEmpty. Operand 507 states and 701 transitions. [2020-10-28 18:30:57,643 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-10-28 18:30:57,643 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 18:30:57,643 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] [2020-10-28 18:30:57,643 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-28 18:30:57,643 INFO L429 AbstractCegarLoop]: === Iteration 17 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 18:30:57,644 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 18:30:57,644 INFO L82 PathProgramCache]: Analyzing trace with hash -1623986088, now seen corresponding path program 1 times [2020-10-28 18:30:57,644 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 18:30:57,644 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1582302195] [2020-10-28 18:30:57,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 18:30:57,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:30:57,698 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:30:57,810 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:30:57,877 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:30:58,312 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:30:59,153 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:30:59,153 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 69 [2020-10-28 18:30:59,153 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-28 18:30:59,153 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1476 [2020-10-28 18:30:59,153 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:30:59,153 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:30:59,154 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-28 18:30:59,154 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 18:30:59,154 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 44 [2020-10-28 18:30:59,154 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:30:59,659 WARN L193 SmtUtils]: Spent 371.00 ms on a formula simplification that was a NOOP. DAG size: 211 [2020-10-28 18:30:59,660 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 18:30:59,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:30:59,669 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:30:59,677 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:30:59,677 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 18:30:59,678 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 18:30:59,678 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-28 18:30:59,678 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:30:59,678 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:30:59,678 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 18:30:59,678 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 18:30:59,678 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 18:30:59,679 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:30:59,719 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 18:30:59,719 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1582302195] [2020-10-28 18:30:59,719 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 18:30:59,720 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-10-28 18:30:59,720 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1641436478] [2020-10-28 18:30:59,720 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-28 18:30:59,720 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 18:30:59,721 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-28 18:30:59,721 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2020-10-28 18:30:59,721 INFO L87 Difference]: Start difference. First operand 507 states and 701 transitions. Second operand 9 states. [2020-10-28 18:31:00,175 WARN L193 SmtUtils]: Spent 398.00 ms on a formula simplification that was a NOOP. DAG size: 218 [2020-10-28 18:31:01,238 WARN L193 SmtUtils]: Spent 408.00 ms on a formula simplification that was a NOOP. DAG size: 220 [2020-10-28 18:31:02,199 WARN L193 SmtUtils]: Spent 398.00 ms on a formula simplification that was a NOOP. DAG size: 221 [2020-10-28 18:31:02,237 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 18:31:02,237 INFO L93 Difference]: Finished difference Result 512 states and 704 transitions. [2020-10-28 18:31:02,238 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-28 18:31:02,238 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 61 [2020-10-28 18:31:02,238 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 18:31:02,241 INFO L225 Difference]: With dead ends: 512 [2020-10-28 18:31:02,241 INFO L226 Difference]: Without dead ends: 498 [2020-10-28 18:31:02,242 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=72, Invalid=234, Unknown=0, NotChecked=0, Total=306 [2020-10-28 18:31:02,243 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 498 states. [2020-10-28 18:31:02,319 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 498 to 495. [2020-10-28 18:31:02,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 495 states. [2020-10-28 18:31:02,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 495 states to 495 states and 686 transitions. [2020-10-28 18:31:02,321 INFO L78 Accepts]: Start accepts. Automaton has 495 states and 686 transitions. Word has length 61 [2020-10-28 18:31:02,321 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 18:31:02,321 INFO L481 AbstractCegarLoop]: Abstraction has 495 states and 686 transitions. [2020-10-28 18:31:02,321 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-28 18:31:02,321 INFO L276 IsEmpty]: Start isEmpty. Operand 495 states and 686 transitions. [2020-10-28 18:31:02,322 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-10-28 18:31:02,322 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 18:31:02,322 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] [2020-10-28 18:31:02,322 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-28 18:31:02,323 INFO L429 AbstractCegarLoop]: === Iteration 18 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 18:31:02,323 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 18:31:02,323 INFO L82 PathProgramCache]: Analyzing trace with hash 1346588509, now seen corresponding path program 1 times [2020-10-28 18:31:02,323 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 18:31:02,324 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1698201981] [2020-10-28 18:31:02,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 18:31:02,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:31:02,366 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:31:02,489 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:31:02,549 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:31:02,865 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:31:03,445 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:31:03,445 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 69 [2020-10-28 18:31:03,446 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-28 18:31:03,446 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1094 [2020-10-28 18:31:03,446 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:31:03,446 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:31:03,446 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-28 18:31:03,446 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 18:31:03,446 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 38 [2020-10-28 18:31:03,446 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:31:03,931 WARN L193 SmtUtils]: Spent 365.00 ms on a formula simplification that was a NOOP. DAG size: 211 [2020-10-28 18:31:03,932 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 18:31:03,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:31:03,939 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:31:03,944 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:31:03,944 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 18:31:03,944 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 18:31:03,945 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-28 18:31:03,945 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:31:03,945 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:31:03,945 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 18:31:03,945 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 18:31:03,945 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 18:31:03,945 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:31:03,959 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 18:31:03,959 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1698201981] [2020-10-28 18:31:03,959 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 18:31:03,959 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-10-28 18:31:03,960 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1476881057] [2020-10-28 18:31:03,960 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-28 18:31:03,960 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 18:31:03,960 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-28 18:31:03,961 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-10-28 18:31:03,961 INFO L87 Difference]: Start difference. First operand 495 states and 686 transitions. Second operand 8 states. [2020-10-28 18:31:04,413 WARN L193 SmtUtils]: Spent 402.00 ms on a formula simplification that was a NOOP. DAG size: 218 [2020-10-28 18:31:05,482 WARN L193 SmtUtils]: Spent 410.00 ms on a formula simplification that was a NOOP. DAG size: 220 [2020-10-28 18:31:05,537 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 18:31:05,537 INFO L93 Difference]: Finished difference Result 664 states and 941 transitions. [2020-10-28 18:31:05,538 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-28 18:31:05,538 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 61 [2020-10-28 18:31:05,538 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 18:31:05,540 INFO L225 Difference]: With dead ends: 664 [2020-10-28 18:31:05,540 INFO L226 Difference]: Without dead ends: 643 [2020-10-28 18:31:05,541 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=46, Invalid=110, Unknown=0, NotChecked=0, Total=156 [2020-10-28 18:31:05,542 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 643 states. [2020-10-28 18:31:05,621 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 643 to 476. [2020-10-28 18:31:05,622 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 476 states. [2020-10-28 18:31:05,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 476 states to 476 states and 664 transitions. [2020-10-28 18:31:05,624 INFO L78 Accepts]: Start accepts. Automaton has 476 states and 664 transitions. Word has length 61 [2020-10-28 18:31:05,624 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 18:31:05,624 INFO L481 AbstractCegarLoop]: Abstraction has 476 states and 664 transitions. [2020-10-28 18:31:05,624 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-28 18:31:05,624 INFO L276 IsEmpty]: Start isEmpty. Operand 476 states and 664 transitions. [2020-10-28 18:31:05,626 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2020-10-28 18:31:05,626 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 18:31:05,626 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 18:31:05,626 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-28 18:31:05,626 INFO L429 AbstractCegarLoop]: === Iteration 19 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 18:31:05,627 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 18:31:05,627 INFO L82 PathProgramCache]: Analyzing trace with hash -1511878507, now seen corresponding path program 1 times [2020-10-28 18:31:05,627 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 18:31:05,627 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1153184875] [2020-10-28 18:31:05,627 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 18:31:05,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:31:05,667 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:31:05,689 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:31:05,711 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:31:05,730 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:31:05,749 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:31:05,823 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:31:05,868 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:31:06,099 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:31:06,140 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:31:06,272 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:31:06,628 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:31:10,658 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:31:10,658 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 86 [2020-10-28 18:31:10,659 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 11 [2020-10-28 18:31:10,659 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5006 [2020-10-28 18:31:10,659 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:31:10,659 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:31:10,659 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 18:31:10,659 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 39 [2020-10-28 18:31:10,659 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 40 [2020-10-28 18:31:10,659 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:31:11,060 WARN L193 SmtUtils]: Spent 370.00 ms on a formula simplification that was a NOOP. DAG size: 211 [2020-10-28 18:31:11,061 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 18:31:11,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:31:11,068 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:31:11,075 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:31:11,075 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 18:31:11,076 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 18:31:11,076 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-28 18:31:11,076 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:31:11,076 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:31:11,076 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 18:31:11,076 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 18:31:11,076 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 18:31:11,077 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:31:11,096 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 18:31:11,097 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1153184875] [2020-10-28 18:31:11,097 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 18:31:11,097 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 18:31:11,097 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [628171445] [2020-10-28 18:31:11,098 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 18:31:11,098 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 18:31:11,098 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 18:31:11,098 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 18:31:11,099 INFO L87 Difference]: Start difference. First operand 476 states and 664 transitions. Second operand 4 states. [2020-10-28 18:31:11,485 WARN L193 SmtUtils]: Spent 349.00 ms on a formula simplification that was a NOOP. DAG size: 214 [2020-10-28 18:31:12,029 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 18:31:12,029 INFO L93 Difference]: Finished difference Result 1098 states and 1604 transitions. [2020-10-28 18:31:12,030 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 18:31:12,030 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 78 [2020-10-28 18:31:12,030 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 18:31:12,034 INFO L225 Difference]: With dead ends: 1098 [2020-10-28 18:31:12,034 INFO L226 Difference]: Without dead ends: 771 [2020-10-28 18:31:12,035 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-28 18:31:12,036 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 771 states. [2020-10-28 18:31:12,187 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 771 to 768. [2020-10-28 18:31:12,188 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 768 states. [2020-10-28 18:31:12,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 768 states to 768 states and 1092 transitions. [2020-10-28 18:31:12,191 INFO L78 Accepts]: Start accepts. Automaton has 768 states and 1092 transitions. Word has length 78 [2020-10-28 18:31:12,192 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 18:31:12,192 INFO L481 AbstractCegarLoop]: Abstraction has 768 states and 1092 transitions. [2020-10-28 18:31:12,192 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 18:31:12,192 INFO L276 IsEmpty]: Start isEmpty. Operand 768 states and 1092 transitions. [2020-10-28 18:31:12,195 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2020-10-28 18:31:12,195 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 18:31:12,196 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 18:31:12,196 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-28 18:31:12,196 INFO L429 AbstractCegarLoop]: === Iteration 20 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 18:31:12,197 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 18:31:12,197 INFO L82 PathProgramCache]: Analyzing trace with hash -165935572, now seen corresponding path program 1 times [2020-10-28 18:31:12,197 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 18:31:12,197 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [859043575] [2020-10-28 18:31:12,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 18:31:12,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:31:12,255 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:31:12,300 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:31:12,340 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:31:12,376 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:31:12,455 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:31:12,624 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:31:12,692 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:31:12,920 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:31:13,612 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:31:13,950 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:31:17,246 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:31:17,246 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 88 [2020-10-28 18:31:17,246 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 10 [2020-10-28 18:31:17,246 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5012 [2020-10-28 18:31:17,246 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:31:17,246 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:31:17,246 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 18:31:17,247 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 48 [2020-10-28 18:31:17,247 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 19 [2020-10-28 18:31:17,247 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:31:17,673 WARN L193 SmtUtils]: Spent 363.00 ms on a formula simplification that was a NOOP. DAG size: 211 [2020-10-28 18:31:17,675 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 18:31:17,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:31:17,684 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:31:17,693 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:31:17,694 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 18:31:17,694 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 18:31:17,694 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-10-28 18:31:17,694 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:31:17,694 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:31:17,694 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 18:31:17,694 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 18:31:17,694 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 18:31:17,695 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:31:17,714 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 18:31:17,714 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [859043575] [2020-10-28 18:31:17,714 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 18:31:17,714 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 18:31:17,715 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [45562425] [2020-10-28 18:31:17,715 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 18:31:17,715 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 18:31:17,716 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 18:31:17,716 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 18:31:17,716 INFO L87 Difference]: Start difference. First operand 768 states and 1092 transitions. Second operand 4 states. [2020-10-28 18:31:18,170 WARN L193 SmtUtils]: Spent 417.00 ms on a formula simplification that was a NOOP. DAG size: 219 [2020-10-28 18:31:19,080 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 18:31:19,081 INFO L93 Difference]: Finished difference Result 1942 states and 2840 transitions. [2020-10-28 18:31:19,081 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 18:31:19,081 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 80 [2020-10-28 18:31:19,082 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 18:31:19,088 INFO L225 Difference]: With dead ends: 1942 [2020-10-28 18:31:19,088 INFO L226 Difference]: Without dead ends: 1323 [2020-10-28 18:31:19,090 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-28 18:31:19,092 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1323 states. [2020-10-28 18:31:19,346 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1323 to 1256. [2020-10-28 18:31:19,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1256 states. [2020-10-28 18:31:19,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1256 states to 1256 states and 1804 transitions. [2020-10-28 18:31:19,352 INFO L78 Accepts]: Start accepts. Automaton has 1256 states and 1804 transitions. Word has length 80 [2020-10-28 18:31:19,353 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 18:31:19,353 INFO L481 AbstractCegarLoop]: Abstraction has 1256 states and 1804 transitions. [2020-10-28 18:31:19,353 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 18:31:19,353 INFO L276 IsEmpty]: Start isEmpty. Operand 1256 states and 1804 transitions. [2020-10-28 18:31:19,355 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2020-10-28 18:31:19,355 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 18:31:19,355 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 18:31:19,355 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-10-28 18:31:19,356 INFO L429 AbstractCegarLoop]: === Iteration 21 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 18:31:19,356 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 18:31:19,356 INFO L82 PathProgramCache]: Analyzing trace with hash -732080755, now seen corresponding path program 1 times [2020-10-28 18:31:19,356 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 18:31:19,356 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1130167284] [2020-10-28 18:31:19,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 18:31:19,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:31:19,406 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:31:19,440 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:31:19,479 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:31:19,514 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:31:19,616 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:31:19,784 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:31:19,821 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:31:20,695 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:31:23,551 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:31:23,705 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:31:23,760 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:31:23,788 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:31:23,834 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:31:24,364 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:31:24,403 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:31:24,403 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 89 [2020-10-28 18:31:24,403 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 14 [2020-10-28 18:31:24,403 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5016 [2020-10-28 18:31:24,403 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:31:24,404 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:31:24,404 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 18:31:24,404 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 56 [2020-10-28 18:31:24,404 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-28 18:31:24,404 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:31:24,819 WARN L193 SmtUtils]: Spent 359.00 ms on a formula simplification that was a NOOP. DAG size: 211 [2020-10-28 18:31:24,821 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 18:31:24,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:31:24,828 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:31:24,841 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:31:24,841 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 18:31:24,841 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 18:31:24,841 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 14 [2020-10-28 18:31:24,841 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:31:24,841 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:31:24,841 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 18:31:24,842 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 18:31:24,842 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 18:31:24,842 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:31:24,863 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 18:31:24,867 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1130167284] [2020-10-28 18:31:24,868 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 18:31:24,868 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 18:31:24,868 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1055718634] [2020-10-28 18:31:24,869 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 18:31:24,869 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 18:31:24,870 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 18:31:24,870 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 18:31:24,870 INFO L87 Difference]: Start difference. First operand 1256 states and 1804 transitions. Second operand 4 states. [2020-10-28 18:31:25,288 WARN L193 SmtUtils]: Spent 372.00 ms on a formula simplification that was a NOOP. DAG size: 219 [2020-10-28 18:31:26,288 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 18:31:26,288 INFO L93 Difference]: Finished difference Result 3342 states and 4864 transitions. [2020-10-28 18:31:26,289 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 18:31:26,289 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 81 [2020-10-28 18:31:26,289 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 18:31:26,300 INFO L225 Difference]: With dead ends: 3342 [2020-10-28 18:31:26,300 INFO L226 Difference]: Without dead ends: 2235 [2020-10-28 18:31:26,304 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-28 18:31:26,306 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2235 states. [2020-10-28 18:31:26,650 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2235 to 2120. [2020-10-28 18:31:26,651 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2120 states. [2020-10-28 18:31:26,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2120 states to 2120 states and 3044 transitions. [2020-10-28 18:31:26,657 INFO L78 Accepts]: Start accepts. Automaton has 2120 states and 3044 transitions. Word has length 81 [2020-10-28 18:31:26,658 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 18:31:26,658 INFO L481 AbstractCegarLoop]: Abstraction has 2120 states and 3044 transitions. [2020-10-28 18:31:26,658 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 18:31:26,658 INFO L276 IsEmpty]: Start isEmpty. Operand 2120 states and 3044 transitions. [2020-10-28 18:31:26,660 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2020-10-28 18:31:26,660 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 18:31:26,660 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 18:31:26,660 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-10-28 18:31:26,660 INFO L429 AbstractCegarLoop]: === Iteration 22 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 18:31:26,661 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 18:31:26,661 INFO L82 PathProgramCache]: Analyzing trace with hash -876286969, now seen corresponding path program 1 times [2020-10-28 18:31:26,661 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 18:31:26,661 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1299440775] [2020-10-28 18:31:26,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 18:31:26,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:31:26,710 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:31:26,745 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:31:26,784 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:31:26,829 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:31:26,869 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:31:26,919 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:31:27,026 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:31:27,483 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:31:27,599 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:31:27,770 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:31:29,266 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:31:30,595 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:31:30,780 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:31:31,692 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:31:31,692 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 90 [2020-10-28 18:31:31,693 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 13 [2020-10-28 18:31:31,693 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-28 18:31:31,693 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:31:31,693 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:31:31,693 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 18:31:31,693 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-28 18:31:31,693 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 63 [2020-10-28 18:31:31,693 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:31:32,108 WARN L193 SmtUtils]: Spent 363.00 ms on a formula simplification that was a NOOP. DAG size: 211 [2020-10-28 18:31:32,109 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 18:31:32,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:31:32,123 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:31:32,170 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:31:32,171 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 18:31:32,171 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 18:31:32,171 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 51 [2020-10-28 18:31:32,171 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:31:32,171 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:31:32,171 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 18:31:32,171 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 18:31:32,171 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-28 18:31:32,171 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:31:32,191 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 18:31:32,191 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1299440775] [2020-10-28 18:31:32,192 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 18:31:32,192 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-28 18:31:32,192 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1103771030] [2020-10-28 18:31:32,192 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-28 18:31:32,192 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 18:31:32,193 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-28 18:31:32,193 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-10-28 18:31:32,193 INFO L87 Difference]: Start difference. First operand 2120 states and 3044 transitions. Second operand 6 states. [2020-10-28 18:31:32,631 WARN L193 SmtUtils]: Spent 376.00 ms on a formula simplification that was a NOOP. DAG size: 218 [2020-10-28 18:31:33,415 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 18:31:33,415 INFO L93 Difference]: Finished difference Result 3107 states and 4494 transitions. [2020-10-28 18:31:33,417 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-28 18:31:33,418 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 82 [2020-10-28 18:31:33,418 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 18:31:33,427 INFO L225 Difference]: With dead ends: 3107 [2020-10-28 18:31:33,427 INFO L226 Difference]: Without dead ends: 2120 [2020-10-28 18:31:33,429 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2020-10-28 18:31:33,431 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2120 states. [2020-10-28 18:31:33,635 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2120 to 1083. [2020-10-28 18:31:33,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1083 states. [2020-10-28 18:31:33,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1083 states to 1083 states and 1537 transitions. [2020-10-28 18:31:33,637 INFO L78 Accepts]: Start accepts. Automaton has 1083 states and 1537 transitions. Word has length 82 [2020-10-28 18:31:33,637 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 18:31:33,637 INFO L481 AbstractCegarLoop]: Abstraction has 1083 states and 1537 transitions. [2020-10-28 18:31:33,637 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-28 18:31:33,638 INFO L276 IsEmpty]: Start isEmpty. Operand 1083 states and 1537 transitions. [2020-10-28 18:31:33,638 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2020-10-28 18:31:33,638 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 18:31:33,638 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 18:31:33,639 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-10-28 18:31:33,639 INFO L429 AbstractCegarLoop]: === Iteration 23 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 18:31:33,639 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 18:31:33,639 INFO L82 PathProgramCache]: Analyzing trace with hash 97201990, now seen corresponding path program 1 times [2020-10-28 18:31:33,639 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 18:31:33,639 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1372331344] [2020-10-28 18:31:33,639 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 18:31:33,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:31:33,685 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:31:33,724 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:31:33,787 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:31:33,902 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:31:34,257 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:31:34,557 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:31:34,797 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:31:35,108 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:31:36,163 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:31:36,197 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:31:36,261 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:31:36,751 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:31:38,670 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:31:38,670 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 90 [2020-10-28 18:31:38,670 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 12 [2020-10-28 18:31:38,670 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-28 18:31:38,670 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:31:38,670 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:31:38,670 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 18:31:38,670 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 52 [2020-10-28 18:31:38,670 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-28 18:31:38,671 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:31:39,117 WARN L193 SmtUtils]: Spent 393.00 ms on a formula simplification that was a NOOP. DAG size: 211 [2020-10-28 18:31:39,118 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 18:31:39,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:31:39,125 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:31:39,129 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:31:39,130 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 18:31:39,130 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 18:31:39,130 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-28 18:31:39,130 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:31:39,130 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:31:39,130 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 18:31:39,130 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 18:31:39,130 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 18:31:39,130 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:31:39,144 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 18:31:39,144 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1372331344] [2020-10-28 18:31:39,144 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 18:31:39,144 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 18:31:39,145 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [241669290] [2020-10-28 18:31:39,145 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 18:31:39,145 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 18:31:39,145 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 18:31:39,146 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 18:31:39,146 INFO L87 Difference]: Start difference. First operand 1083 states and 1537 transitions. Second operand 4 states. [2020-10-28 18:31:39,562 WARN L193 SmtUtils]: Spent 378.00 ms on a formula simplification that was a NOOP. DAG size: 219 [2020-10-28 18:31:40,449 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 18:31:40,449 INFO L93 Difference]: Finished difference Result 2929 states and 4181 transitions. [2020-10-28 18:31:40,449 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 18:31:40,450 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 82 [2020-10-28 18:31:40,450 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 18:31:40,456 INFO L225 Difference]: With dead ends: 2929 [2020-10-28 18:31:40,456 INFO L226 Difference]: Without dead ends: 1942 [2020-10-28 18:31:40,459 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-28 18:31:40,461 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1942 states. [2020-10-28 18:31:40,843 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1942 to 1811. [2020-10-28 18:31:40,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1811 states. [2020-10-28 18:31:40,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1811 states to 1811 states and 2537 transitions. [2020-10-28 18:31:40,851 INFO L78 Accepts]: Start accepts. Automaton has 1811 states and 2537 transitions. Word has length 82 [2020-10-28 18:31:40,851 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 18:31:40,851 INFO L481 AbstractCegarLoop]: Abstraction has 1811 states and 2537 transitions. [2020-10-28 18:31:40,851 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 18:31:40,851 INFO L276 IsEmpty]: Start isEmpty. Operand 1811 states and 2537 transitions. [2020-10-28 18:31:40,852 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2020-10-28 18:31:40,852 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 18:31:40,852 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 18:31:40,852 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-10-28 18:31:40,852 INFO L429 AbstractCegarLoop]: === Iteration 24 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 18:31:40,853 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 18:31:40,853 INFO L82 PathProgramCache]: Analyzing trace with hash -1386682885, now seen corresponding path program 1 times [2020-10-28 18:31:40,853 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 18:31:40,853 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1606866398] [2020-10-28 18:31:40,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 18:31:40,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:31:40,897 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:31:40,932 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:31:40,982 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:31:41,038 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:31:41,242 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:31:41,314 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:31:41,446 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:31:41,892 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:31:42,362 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:31:43,800 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:31:43,822 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:31:45,889 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:31:45,889 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 91 [2020-10-28 18:31:45,889 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 11 [2020-10-28 18:31:45,889 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5009 [2020-10-28 18:31:45,889 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:31:45,889 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:31:45,890 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-28 18:31:45,890 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-28 18:31:45,890 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 71 [2020-10-28 18:31:45,890 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:31:46,325 WARN L193 SmtUtils]: Spent 369.00 ms on a formula simplification that was a NOOP. DAG size: 211 [2020-10-28 18:31:46,326 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 18:31:46,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:31:46,333 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:31:46,339 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:31:46,339 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 18:31:46,339 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 18:31:46,339 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-28 18:31:46,339 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:31:46,340 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:31:46,340 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 18:31:46,340 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 18:31:46,340 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 18:31:46,340 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:31:46,358 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 18:31:46,358 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1606866398] [2020-10-28 18:31:46,358 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 18:31:46,359 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-28 18:31:46,359 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1866475660] [2020-10-28 18:31:46,359 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-28 18:31:46,359 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 18:31:46,359 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-28 18:31:46,360 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-28 18:31:46,360 INFO L87 Difference]: Start difference. First operand 1811 states and 2537 transitions. Second operand 5 states. [2020-10-28 18:31:46,815 WARN L193 SmtUtils]: Spent 417.00 ms on a formula simplification that was a NOOP. DAG size: 219 [2020-10-28 18:31:47,583 WARN L193 SmtUtils]: Spent 355.00 ms on a formula simplification that was a NOOP. DAG size: 213 [2020-10-28 18:31:48,186 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 18:31:48,186 INFO L93 Difference]: Finished difference Result 4381 states and 6153 transitions. [2020-10-28 18:31:48,186 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-28 18:31:48,186 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 83 [2020-10-28 18:31:48,187 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 18:31:48,195 INFO L225 Difference]: With dead ends: 4381 [2020-10-28 18:31:48,195 INFO L226 Difference]: Without dead ends: 2666 [2020-10-28 18:31:48,198 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2020-10-28 18:31:48,201 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2666 states. [2020-10-28 18:31:48,683 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2666 to 2663. [2020-10-28 18:31:48,683 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2663 states. [2020-10-28 18:31:48,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2663 states to 2663 states and 3685 transitions. [2020-10-28 18:31:48,690 INFO L78 Accepts]: Start accepts. Automaton has 2663 states and 3685 transitions. Word has length 83 [2020-10-28 18:31:48,690 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 18:31:48,690 INFO L481 AbstractCegarLoop]: Abstraction has 2663 states and 3685 transitions. [2020-10-28 18:31:48,690 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-28 18:31:48,690 INFO L276 IsEmpty]: Start isEmpty. Operand 2663 states and 3685 transitions. [2020-10-28 18:31:48,691 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2020-10-28 18:31:48,691 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 18:31:48,691 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 18:31:48,691 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-10-28 18:31:48,691 INFO L429 AbstractCegarLoop]: === Iteration 25 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 18:31:48,692 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 18:31:48,692 INFO L82 PathProgramCache]: Analyzing trace with hash 674615987, now seen corresponding path program 1 times [2020-10-28 18:31:48,692 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 18:31:48,692 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1283343450] [2020-10-28 18:31:48,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 18:31:48,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:31:48,737 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:31:48,765 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:31:48,786 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:31:48,806 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:31:48,857 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:31:48,891 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:31:48,933 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:31:49,126 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:31:49,174 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:31:50,727 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:31:53,729 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:31:53,729 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 91 [2020-10-28 18:31:53,729 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 10 [2020-10-28 18:31:53,729 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5008 [2020-10-28 18:31:53,730 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:31:53,730 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:31:53,730 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 18:31:53,730 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 41 [2020-10-28 18:31:53,730 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 43 [2020-10-28 18:31:53,730 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:31:54,129 WARN L193 SmtUtils]: Spent 367.00 ms on a formula simplification that was a NOOP. DAG size: 211 [2020-10-28 18:31:54,130 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 18:31:54,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:31:54,137 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:31:54,143 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:31:54,143 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 18:31:54,143 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 18:31:54,143 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-28 18:31:54,143 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:31:54,143 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:31:54,143 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 18:31:54,143 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 18:31:54,143 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 18:31:54,143 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:31:54,157 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 18:31:54,157 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1283343450] [2020-10-28 18:31:54,158 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 18:31:54,158 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 18:31:54,158 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [421558241] [2020-10-28 18:31:54,158 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 18:31:54,158 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 18:31:54,159 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 18:31:54,159 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 18:31:54,159 INFO L87 Difference]: Start difference. First operand 2663 states and 3685 transitions. Second operand 4 states. [2020-10-28 18:31:54,606 WARN L193 SmtUtils]: Spent 410.00 ms on a formula simplification that was a NOOP. DAG size: 214 [2020-10-28 18:31:55,814 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 18:31:55,814 INFO L93 Difference]: Finished difference Result 6569 states and 9161 transitions. [2020-10-28 18:31:55,814 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 18:31:55,814 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 83 [2020-10-28 18:31:55,815 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 18:31:55,832 INFO L225 Difference]: With dead ends: 6569 [2020-10-28 18:31:55,832 INFO L226 Difference]: Without dead ends: 4014 [2020-10-28 18:31:55,837 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-28 18:31:55,841 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4014 states. [2020-10-28 18:31:56,621 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4014 to 4011. [2020-10-28 18:31:56,622 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4011 states. [2020-10-28 18:31:56,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4011 states to 4011 states and 5509 transitions. [2020-10-28 18:31:56,629 INFO L78 Accepts]: Start accepts. Automaton has 4011 states and 5509 transitions. Word has length 83 [2020-10-28 18:31:56,629 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 18:31:56,629 INFO L481 AbstractCegarLoop]: Abstraction has 4011 states and 5509 transitions. [2020-10-28 18:31:56,629 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 18:31:56,629 INFO L276 IsEmpty]: Start isEmpty. Operand 4011 states and 5509 transitions. [2020-10-28 18:31:56,630 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2020-10-28 18:31:56,630 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 18:31:56,630 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 18:31:56,631 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-10-28 18:31:56,631 INFO L429 AbstractCegarLoop]: === Iteration 26 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 18:31:56,631 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 18:31:56,631 INFO L82 PathProgramCache]: Analyzing trace with hash 192745654, now seen corresponding path program 1 times [2020-10-28 18:31:56,631 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 18:31:56,632 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [289887128] [2020-10-28 18:31:56,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 18:31:56,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:31:56,673 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:31:56,700 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:31:56,752 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:31:56,846 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:31:56,996 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:31:57,276 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:31:57,464 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:31:57,550 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:31:57,592 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:32:01,665 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:32:01,665 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 92 [2020-10-28 18:32:01,665 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-28 18:32:01,665 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5006 [2020-10-28 18:32:01,666 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:32:01,666 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:32:01,666 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-28 18:32:01,666 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 18:32:01,666 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 62 [2020-10-28 18:32:01,666 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:32:02,199 WARN L193 SmtUtils]: Spent 431.00 ms on a formula simplification that was a NOOP. DAG size: 211 [2020-10-28 18:32:02,200 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 18:32:02,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:32:02,209 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:32:02,219 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:32:02,219 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 18:32:02,219 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 18:32:02,220 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12 [2020-10-28 18:32:02,220 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:32:02,220 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:32:02,220 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 18:32:02,220 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 18:32:02,220 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 18:32:02,220 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:32:02,249 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 18:32:02,250 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [289887128] [2020-10-28 18:32:02,250 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 18:32:02,250 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-10-28 18:32:02,250 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [39483713] [2020-10-28 18:32:02,251 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-28 18:32:02,251 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 18:32:02,252 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-28 18:32:02,252 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-10-28 18:32:02,252 INFO L87 Difference]: Start difference. First operand 4011 states and 5509 transitions. Second operand 8 states. [2020-10-28 18:32:02,726 WARN L193 SmtUtils]: Spent 407.00 ms on a formula simplification that was a NOOP. DAG size: 219 [2020-10-28 18:32:03,790 WARN L193 SmtUtils]: Spent 390.00 ms on a formula simplification that was a NOOP. DAG size: 217 [2020-10-28 18:32:04,229 WARN L193 SmtUtils]: Spent 411.00 ms on a formula simplification that was a NOOP. DAG size: 213 [2020-10-28 18:32:05,315 WARN L193 SmtUtils]: Spent 400.00 ms on a formula simplification that was a NOOP. DAG size: 214 [2020-10-28 18:32:06,319 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 18:32:06,319 INFO L93 Difference]: Finished difference Result 10187 states and 13974 transitions. [2020-10-28 18:32:06,319 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-28 18:32:06,319 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 84 [2020-10-28 18:32:06,320 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 18:32:06,335 INFO L225 Difference]: With dead ends: 10187 [2020-10-28 18:32:06,335 INFO L226 Difference]: Without dead ends: 6267 [2020-10-28 18:32:06,341 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=93, Invalid=327, Unknown=0, NotChecked=0, Total=420 [2020-10-28 18:32:06,346 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6267 states. [2020-10-28 18:32:07,466 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6267 to 5925. [2020-10-28 18:32:07,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5925 states. [2020-10-28 18:32:07,474 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5925 states to 5925 states and 8114 transitions. [2020-10-28 18:32:07,475 INFO L78 Accepts]: Start accepts. Automaton has 5925 states and 8114 transitions. Word has length 84 [2020-10-28 18:32:07,475 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 18:32:07,475 INFO L481 AbstractCegarLoop]: Abstraction has 5925 states and 8114 transitions. [2020-10-28 18:32:07,475 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-28 18:32:07,475 INFO L276 IsEmpty]: Start isEmpty. Operand 5925 states and 8114 transitions. [2020-10-28 18:32:07,476 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2020-10-28 18:32:07,476 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 18:32:07,476 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 18:32:07,476 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-10-28 18:32:07,476 INFO L429 AbstractCegarLoop]: === Iteration 27 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 18:32:07,476 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 18:32:07,477 INFO L82 PathProgramCache]: Analyzing trace with hash 1128485916, now seen corresponding path program 1 times [2020-10-28 18:32:07,477 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 18:32:07,477 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1830481775] [2020-10-28 18:32:07,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 18:32:07,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:32:07,510 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:32:07,534 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:32:07,558 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:32:07,601 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:32:07,670 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:32:08,007 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:32:08,159 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:32:08,191 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:32:08,229 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:32:08,517 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:32:10,132 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:32:12,320 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:32:12,377 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:32:12,501 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:32:12,502 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 94 [2020-10-28 18:32:12,502 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 13 [2020-10-28 18:32:12,502 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-28 18:32:12,502 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:32:12,502 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:32:12,502 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 18:32:12,502 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-28 18:32:12,502 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 75 [2020-10-28 18:32:12,502 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:32:12,930 WARN L193 SmtUtils]: Spent 371.00 ms on a formula simplification that was a NOOP. DAG size: 211 [2020-10-28 18:32:12,931 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 18:32:12,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:32:12,944 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:32:12,957 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:32:12,957 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 18:32:12,957 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 18:32:12,958 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 16 [2020-10-28 18:32:12,958 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:32:12,958 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:32:12,958 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 18:32:12,958 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 18:32:12,958 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-28 18:32:12,958 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:32:12,982 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 18:32:12,982 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1830481775] [2020-10-28 18:32:12,982 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 18:32:12,982 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-28 18:32:12,983 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [518166852] [2020-10-28 18:32:12,983 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-28 18:32:12,983 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 18:32:12,984 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-28 18:32:12,984 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-10-28 18:32:12,984 INFO L87 Difference]: Start difference. First operand 5925 states and 8114 transitions. Second operand 6 states. [2020-10-28 18:32:13,437 WARN L193 SmtUtils]: Spent 398.00 ms on a formula simplification that was a NOOP. DAG size: 218 [2020-10-28 18:32:14,724 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 18:32:14,725 INFO L93 Difference]: Finished difference Result 10221 states and 13966 transitions. [2020-10-28 18:32:14,725 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-28 18:32:14,725 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 86 [2020-10-28 18:32:14,726 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 18:32:14,735 INFO L225 Difference]: With dead ends: 10221 [2020-10-28 18:32:14,735 INFO L226 Difference]: Without dead ends: 4404 [2020-10-28 18:32:14,745 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2020-10-28 18:32:14,748 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4404 states. [2020-10-28 18:32:15,477 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4404 to 3023. [2020-10-28 18:32:15,477 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3023 states. [2020-10-28 18:32:15,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3023 states to 3023 states and 4120 transitions. [2020-10-28 18:32:15,482 INFO L78 Accepts]: Start accepts. Automaton has 3023 states and 4120 transitions. Word has length 86 [2020-10-28 18:32:15,482 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 18:32:15,482 INFO L481 AbstractCegarLoop]: Abstraction has 3023 states and 4120 transitions. [2020-10-28 18:32:15,482 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-28 18:32:15,482 INFO L276 IsEmpty]: Start isEmpty. Operand 3023 states and 4120 transitions. [2020-10-28 18:32:15,483 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2020-10-28 18:32:15,483 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 18:32:15,483 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 18:32:15,483 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-10-28 18:32:15,483 INFO L429 AbstractCegarLoop]: === Iteration 28 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 18:32:15,483 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 18:32:15,483 INFO L82 PathProgramCache]: Analyzing trace with hash -1887156645, now seen corresponding path program 1 times [2020-10-28 18:32:15,483 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 18:32:15,483 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [268079255] [2020-10-28 18:32:15,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 18:32:15,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:32:15,520 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:32:15,597 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:32:15,648 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:32:15,714 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:32:16,291 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:32:19,410 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:32:19,411 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 94 [2020-10-28 18:32:19,411 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-28 18:32:19,411 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3904 [2020-10-28 18:32:19,411 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:32:19,411 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:32:19,411 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-28 18:32:19,411 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 18:32:19,411 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 42 [2020-10-28 18:32:19,412 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:32:19,836 WARN L193 SmtUtils]: Spent 341.00 ms on a formula simplification that was a NOOP. DAG size: 211 [2020-10-28 18:32:19,837 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 18:32:19,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:32:19,844 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:32:19,850 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:32:19,850 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 18:32:19,850 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 18:32:19,850 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-28 18:32:19,851 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:32:19,851 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:32:19,851 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 18:32:19,851 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 18:32:19,851 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 18:32:19,851 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:32:19,866 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 18:32:19,866 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [268079255] [2020-10-28 18:32:19,866 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 18:32:19,867 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-10-28 18:32:19,867 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [667097954] [2020-10-28 18:32:19,867 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-28 18:32:19,867 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 18:32:19,867 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-28 18:32:19,868 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-10-28 18:32:19,868 INFO L87 Difference]: Start difference. First operand 3023 states and 4120 transitions. Second operand 8 states. [2020-10-28 18:32:20,310 WARN L193 SmtUtils]: Spent 380.00 ms on a formula simplification that was a NOOP. DAG size: 223 [2020-10-28 18:32:21,491 WARN L193 SmtUtils]: Spent 385.00 ms on a formula simplification that was a NOOP. DAG size: 219 [2020-10-28 18:32:23,126 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 18:32:23,126 INFO L93 Difference]: Finished difference Result 9101 states and 12386 transitions. [2020-10-28 18:32:23,127 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-28 18:32:23,127 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 86 [2020-10-28 18:32:23,127 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 18:32:23,139 INFO L225 Difference]: With dead ends: 9101 [2020-10-28 18:32:23,139 INFO L226 Difference]: Without dead ends: 6147 [2020-10-28 18:32:23,146 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2020-10-28 18:32:23,153 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6147 states. [2020-10-28 18:32:24,085 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6147 to 3023. [2020-10-28 18:32:24,085 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3023 states. [2020-10-28 18:32:24,090 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3023 states to 3023 states and 4119 transitions. [2020-10-28 18:32:24,090 INFO L78 Accepts]: Start accepts. Automaton has 3023 states and 4119 transitions. Word has length 86 [2020-10-28 18:32:24,090 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 18:32:24,090 INFO L481 AbstractCegarLoop]: Abstraction has 3023 states and 4119 transitions. [2020-10-28 18:32:24,091 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-28 18:32:24,091 INFO L276 IsEmpty]: Start isEmpty. Operand 3023 states and 4119 transitions. [2020-10-28 18:32:24,091 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2020-10-28 18:32:24,091 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 18:32:24,091 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 18:32:24,091 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2020-10-28 18:32:24,091 INFO L429 AbstractCegarLoop]: === Iteration 29 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 18:32:24,092 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 18:32:24,092 INFO L82 PathProgramCache]: Analyzing trace with hash 184416602, now seen corresponding path program 1 times [2020-10-28 18:32:24,092 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 18:32:24,092 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [213057995] [2020-10-28 18:32:24,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 18:32:24,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:32:24,123 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:32:24,146 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:32:24,182 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:32:24,233 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:32:24,484 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:32:24,530 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:32:24,572 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:32:24,611 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:32:25,018 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:32:26,286 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:32:27,646 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:32:28,054 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:32:29,119 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:32:29,119 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 94 [2020-10-28 18:32:29,120 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 12 [2020-10-28 18:32:29,120 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5007 [2020-10-28 18:32:29,120 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:32:29,120 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:32:29,120 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 18:32:29,120 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-28 18:32:29,120 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 70 [2020-10-28 18:32:29,120 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:32:29,543 WARN L193 SmtUtils]: Spent 369.00 ms on a formula simplification that was a NOOP. DAG size: 211 [2020-10-28 18:32:29,544 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 18:32:29,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:32:29,555 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:32:29,567 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:32:29,567 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 18:32:29,567 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 18:32:29,567 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 15 [2020-10-28 18:32:29,567 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:32:29,568 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:32:29,568 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 18:32:29,568 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 18:32:29,568 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-28 18:32:29,568 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:32:29,591 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 18:32:29,592 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [213057995] [2020-10-28 18:32:29,592 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 18:32:29,592 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-28 18:32:29,592 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1987107456] [2020-10-28 18:32:29,592 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-28 18:32:29,592 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 18:32:29,593 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-28 18:32:29,593 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-10-28 18:32:29,593 INFO L87 Difference]: Start difference. First operand 3023 states and 4119 transitions. Second operand 6 states.