/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.3.1.ufo.BOUNDED-6.pals.c.v+nlh-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-28 18:26:26,798 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-28 18:26:26,803 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-28 18:26:26,860 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-28 18:26:26,860 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-28 18:26:26,866 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-28 18:26:26,869 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-28 18:26:26,873 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-28 18:26:26,876 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-28 18:26:26,882 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-28 18:26:26,884 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-28 18:26:26,885 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-28 18:26:26,885 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-28 18:26:26,889 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-28 18:26:26,892 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-28 18:26:26,894 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-28 18:26:26,896 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-28 18:26:26,899 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-28 18:26:26,905 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-28 18:26:26,913 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-28 18:26:26,915 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-28 18:26:26,917 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-28 18:26:26,918 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-28 18:26:26,920 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-28 18:26:26,929 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-28 18:26:26,929 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-28 18:26:26,929 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-28 18:26:26,932 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-28 18:26:26,932 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-28 18:26:26,933 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-28 18:26:26,934 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-28 18:26:26,934 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-28 18:26:26,937 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-28 18:26:26,937 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-28 18:26:26,938 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-28 18:26:26,939 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-28 18:26:26,939 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-28 18:26:26,940 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-28 18:26:26,940 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-28 18:26:26,941 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-28 18:26:26,941 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-28 18:26:26,949 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 18:26:26,996 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-28 18:26:26,996 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-28 18:26:27,001 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-28 18:26:27,001 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-28 18:26:27,001 INFO L138 SettingsManager]: * Use SBE=true [2020-10-28 18:26:27,002 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-28 18:26:27,002 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-28 18:26:27,002 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-28 18:26:27,002 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-28 18:26:27,002 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-28 18:26:27,004 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-28 18:26:27,004 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-28 18:26:27,004 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-28 18:26:27,004 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-28 18:26:27,004 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-28 18:26:27,005 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-28 18:26:27,005 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-28 18:26:27,005 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-28 18:26:27,005 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-28 18:26:27,005 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-28 18:26:27,006 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-28 18:26:27,006 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-28 18:26:27,006 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-28 18:26:27,006 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-28 18:26:27,006 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-28 18:26:27,006 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-28 18:26:27,007 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-28 18:26:27,007 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-28 18:26:27,007 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-28 18:26:27,007 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.6;log-additional-information=true;unknown-allowed=true; [2020-10-28 18:26:27,450 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-28 18:26:27,478 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-28 18:26:27,482 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-28 18:26:27,483 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-28 18:26:27,484 INFO L275 PluginConnector]: CDTParser initialized [2020-10-28 18:26:27,485 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_lcr.3.1.ufo.BOUNDED-6.pals.c.v+nlh-reducer.c [2020-10-28 18:26:27,560 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/75d7191d8/2a9c2e703cae45d6b6e24f3277557ed0/FLAG31836c22a [2020-10-28 18:26:28,343 INFO L306 CDTParser]: Found 1 translation units. [2020-10-28 18:26:28,345 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/seq-mthreaded-reduced/pals_lcr.3.1.ufo.BOUNDED-6.pals.c.v+nlh-reducer.c [2020-10-28 18:26:28,355 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/75d7191d8/2a9c2e703cae45d6b6e24f3277557ed0/FLAG31836c22a [2020-10-28 18:26:28,623 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/75d7191d8/2a9c2e703cae45d6b6e24f3277557ed0 [2020-10-28 18:26:28,626 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-28 18:26:28,632 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-28 18:26:28,634 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-28 18:26:28,634 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-28 18:26:28,638 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-28 18:26:28,639 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 06:26:28" (1/1) ... [2020-10-28 18:26:28,642 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@179c13ac and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 06:26:28, skipping insertion in model container [2020-10-28 18:26:28,642 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 06:26:28" (1/1) ... [2020-10-28 18:26:28,651 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-28 18:26:28,688 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-28 18:26:28,952 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-28 18:26:28,974 INFO L203 MainTranslator]: Completed pre-run [2020-10-28 18:26:29,080 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-28 18:26:29,103 INFO L208 MainTranslator]: Completed translation [2020-10-28 18:26:29,104 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 06:26:29 WrapperNode [2020-10-28 18:26:29,104 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-28 18:26:29,105 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-28 18:26:29,105 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-28 18:26:29,105 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-28 18:26:29,121 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 06:26:29" (1/1) ... [2020-10-28 18:26:29,121 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 06:26:29" (1/1) ... [2020-10-28 18:26:29,133 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 06:26:29" (1/1) ... [2020-10-28 18:26:29,134 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 06:26:29" (1/1) ... [2020-10-28 18:26:29,149 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 06:26:29" (1/1) ... [2020-10-28 18:26:29,157 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 06:26:29" (1/1) ... [2020-10-28 18:26:29,161 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 06:26:29" (1/1) ... [2020-10-28 18:26:29,166 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-28 18:26:29,167 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-28 18:26:29,167 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-28 18:26:29,167 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-28 18:26:29,168 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 06:26:29" (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 18:26:29,251 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-28 18:26:29,251 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-28 18:26:29,251 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-28 18:26:29,252 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-10-28 18:26:29,252 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-28 18:26:29,252 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-28 18:26:29,252 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-28 18:26:29,252 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-28 18:26:29,252 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-28 18:26:29,253 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-10-28 18:26:29,253 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-10-28 18:26:29,253 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2020-10-28 18:26:29,253 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-10-28 18:26:29,253 INFO L130 BoogieDeclarations]: Found specification of procedure read [2020-10-28 18:26:29,253 INFO L130 BoogieDeclarations]: Found specification of procedure write [2020-10-28 18:26:29,253 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2020-10-28 18:26:29,254 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2020-10-28 18:26:29,254 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2020-10-28 18:26:29,254 INFO L130 BoogieDeclarations]: Found specification of procedure init [2020-10-28 18:26:29,254 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-10-28 18:26:29,254 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-28 18:26:29,254 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-28 18:26:29,254 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-28 18:26:29,255 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-28 18:26:29,255 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-28 18:26:29,255 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-28 18:26:29,255 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-28 18:26:30,126 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-28 18:26:30,126 INFO L298 CfgBuilder]: Removed 0 assume(true) statements. [2020-10-28 18:26:30,128 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 06:26:30 BoogieIcfgContainer [2020-10-28 18:26:30,129 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-28 18:26:30,130 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-28 18:26:30,131 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-28 18:26:30,134 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-28 18:26:30,135 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.10 06:26:28" (1/3) ... [2020-10-28 18:26:30,136 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@686fe3d3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 06:26:30, skipping insertion in model container [2020-10-28 18:26:30,136 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 06:26:29" (2/3) ... [2020-10-28 18:26:30,136 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@686fe3d3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 06:26:30, skipping insertion in model container [2020-10-28 18:26:30,136 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 06:26:30" (3/3) ... [2020-10-28 18:26:30,138 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_lcr.3.1.ufo.BOUNDED-6.pals.c.v+nlh-reducer.c [2020-10-28 18:26:30,154 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-28 18:26:30,161 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-28 18:26:30,176 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-28 18:26:30,208 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-28 18:26:30,208 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-28 18:26:30,209 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-28 18:26:30,209 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-28 18:26:30,209 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-28 18:26:30,209 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-28 18:26:30,209 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-28 18:26:30,209 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-28 18:26:30,232 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states. [2020-10-28 18:26:30,241 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-10-28 18:26:30,241 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 18:26:30,242 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 18:26:30,243 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 18:26:30,249 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 18:26:30,250 INFO L82 PathProgramCache]: Analyzing trace with hash -1094105252, now seen corresponding path program 1 times [2020-10-28 18:26:30,260 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 18:26:30,261 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [155943553] [2020-10-28 18:26:30,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 18:26:30,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:26:30,677 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:26:30,828 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:26:31,039 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:26:31,169 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:26:31,365 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:26:32,543 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:26:32,667 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:26:35,594 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:26:35,595 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 61 [2020-10-28 18:26:35,595 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-28 18:26:35,595 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5017 [2020-10-28 18:26:35,598 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:26:35,599 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:26:35,599 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 18:26:35,599 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-28 18:26:35,599 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 41 [2020-10-28 18:26:35,599 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-28 18:26:36,065 WARN L193 SmtUtils]: Spent 333.00 ms on a formula simplification that was a NOOP. DAG size: 136 [2020-10-28 18:26:36,068 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 18:26:36,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:26:36,081 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:26:36,099 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:26:36,099 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 18:26:36,100 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 18:26:36,100 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 21 [2020-10-28 18:26:36,100 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:26:36,100 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:26:36,101 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 18:26:36,101 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 18:26:36,101 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 18:26:36,102 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 18:26:36,124 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 18:26:36,125 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [155943553] [2020-10-28 18:26:36,127 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 18:26:36,127 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-28 18:26:36,128 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1915506396] [2020-10-28 18:26:36,133 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-28 18:26:36,134 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 18:26:36,149 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-28 18:26:36,150 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-28 18:26:36,152 INFO L87 Difference]: Start difference. First operand 115 states. Second operand 6 states. [2020-10-28 18:26:36,628 WARN L193 SmtUtils]: Spent 346.00 ms on a formula simplification that was a NOOP. DAG size: 142 [2020-10-28 18:26:37,358 WARN L193 SmtUtils]: Spent 190.00 ms on a formula simplification that was a NOOP. DAG size: 140 [2020-10-28 18:26:37,592 WARN L193 SmtUtils]: Spent 212.00 ms on a formula simplification that was a NOOP. DAG size: 138 [2020-10-28 18:26:38,315 WARN L193 SmtUtils]: Spent 178.00 ms on a formula simplification that was a NOOP. DAG size: 140 [2020-10-28 18:26:38,522 WARN L193 SmtUtils]: Spent 192.00 ms on a formula simplification that was a NOOP. DAG size: 139 [2020-10-28 18:26:38,536 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 18:26:38,537 INFO L93 Difference]: Finished difference Result 434 states and 691 transitions. [2020-10-28 18:26:38,539 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-28 18:26:38,541 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 53 [2020-10-28 18:26:38,542 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 18:26:38,580 INFO L225 Difference]: With dead ends: 434 [2020-10-28 18:26:38,580 INFO L226 Difference]: Without dead ends: 359 [2020-10-28 18:26:38,586 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=60, Invalid=122, Unknown=0, NotChecked=0, Total=182 [2020-10-28 18:26:38,610 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 359 states. [2020-10-28 18:26:38,682 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 359 to 159. [2020-10-28 18:26:38,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 159 states. [2020-10-28 18:26:38,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 224 transitions. [2020-10-28 18:26:38,688 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 224 transitions. Word has length 53 [2020-10-28 18:26:38,690 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 18:26:38,690 INFO L481 AbstractCegarLoop]: Abstraction has 159 states and 224 transitions. [2020-10-28 18:26:38,691 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-28 18:26:38,691 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 224 transitions. [2020-10-28 18:26:38,694 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-10-28 18:26:38,694 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 18:26:38,694 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 18:26:38,695 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-28 18:26:38,695 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 18:26:38,696 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 18:26:38,697 INFO L82 PathProgramCache]: Analyzing trace with hash -475741743, now seen corresponding path program 1 times [2020-10-28 18:26:38,700 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 18:26:38,702 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [465072390] [2020-10-28 18:26:38,702 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 18:26:38,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:26:38,769 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:26:38,807 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:26:38,843 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:26:38,888 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:26:38,927 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:26:38,957 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:26:39,074 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:26:39,659 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:26:43,752 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:26:43,753 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 62 [2020-10-28 18:26:43,753 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-28 18:26:43,753 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-28 18:26:43,754 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:26:43,754 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:26:43,754 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 18:26:43,754 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 41 [2020-10-28 18:26:43,754 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-28 18:26:43,754 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 18:26:43,984 WARN L193 SmtUtils]: Spent 174.00 ms on a formula simplification that was a NOOP. DAG size: 136 [2020-10-28 18:26:43,985 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 18:26:43,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:26:43,994 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:26:44,006 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:26:44,006 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 18:26:44,007 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 18:26:44,007 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 14 [2020-10-28 18:26:44,007 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:26:44,007 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:26:44,007 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 18:26:44,008 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 18:26:44,008 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 18:26:44,008 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:26:44,022 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 18:26:44,023 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [465072390] [2020-10-28 18:26:44,023 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 18:26:44,023 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 18:26:44,023 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [491743349] [2020-10-28 18:26:44,025 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 18:26:44,025 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 18:26:44,026 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 18:26:44,026 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 18:26:44,026 INFO L87 Difference]: Start difference. First operand 159 states and 224 transitions. Second operand 4 states. [2020-10-28 18:26:44,266 WARN L193 SmtUtils]: Spent 207.00 ms on a formula simplification that was a NOOP. DAG size: 139 [2020-10-28 18:26:44,858 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 18:26:44,858 INFO L93 Difference]: Finished difference Result 249 states and 359 transitions. [2020-10-28 18:26:44,859 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 18:26:44,859 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 54 [2020-10-28 18:26:44,859 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 18:26:44,861 INFO L225 Difference]: With dead ends: 249 [2020-10-28 18:26:44,861 INFO L226 Difference]: Without dead ends: 164 [2020-10-28 18:26:44,863 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-28 18:26:44,863 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164 states. [2020-10-28 18:26:44,877 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164 to 161. [2020-10-28 18:26:44,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 161 states. [2020-10-28 18:26:44,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 225 transitions. [2020-10-28 18:26:44,879 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 225 transitions. Word has length 54 [2020-10-28 18:26:44,879 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 18:26:44,879 INFO L481 AbstractCegarLoop]: Abstraction has 161 states and 225 transitions. [2020-10-28 18:26:44,880 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 18:26:44,880 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 225 transitions. [2020-10-28 18:26:44,881 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-10-28 18:26:44,881 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 18:26:44,882 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 18:26:44,882 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-28 18:26:44,882 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 18:26:44,883 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 18:26:44,883 INFO L82 PathProgramCache]: Analyzing trace with hash -1197254214, now seen corresponding path program 1 times [2020-10-28 18:26:44,883 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 18:26:44,883 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [893317872] [2020-10-28 18:26:44,883 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 18:26:44,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:26:44,941 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:26:44,978 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:26:45,025 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:26:45,069 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:26:45,127 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:26:45,840 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:26:45,894 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:26:48,261 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:26:48,371 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:26:48,492 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:26:48,647 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:26:48,703 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:26:48,812 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:26:48,988 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:26:49,498 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:26:49,562 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:26:49,926 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:26:49,926 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 63 [2020-10-28 18:26:49,926 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 16 [2020-10-28 18:26:49,926 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-28 18:26:49,927 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:26:49,927 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:26:49,927 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 18:26:49,927 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-28 18:26:49,928 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 43 [2020-10-28 18:26:49,928 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 18:26:50,185 WARN L193 SmtUtils]: Spent 166.00 ms on a formula simplification that was a NOOP. DAG size: 136 [2020-10-28 18:26:50,186 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 18:26:50,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:26:50,195 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:26:50,210 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:26:50,210 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 18:26:50,210 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 18:26:50,210 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 17 [2020-10-28 18:26:50,211 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:26:50,211 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:26:50,211 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 18:26:50,211 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 18:26:50,211 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 18:26:50,211 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:26:50,226 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 18:26:50,228 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [893317872] [2020-10-28 18:26:50,228 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 18:26:50,228 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-28 18:26:50,228 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1458669908] [2020-10-28 18:26:50,229 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-28 18:26:50,229 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 18:26:50,230 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-28 18:26:50,231 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-28 18:26:50,231 INFO L87 Difference]: Start difference. First operand 161 states and 225 transitions. Second operand 6 states. [2020-10-28 18:26:50,448 WARN L193 SmtUtils]: Spent 173.00 ms on a formula simplification that was a NOOP. DAG size: 143 [2020-10-28 18:26:50,911 WARN L193 SmtUtils]: Spent 170.00 ms on a formula simplification that was a NOOP. DAG size: 138 [2020-10-28 18:26:51,137 WARN L193 SmtUtils]: Spent 188.00 ms on a formula simplification that was a NOOP. DAG size: 141 [2020-10-28 18:26:51,381 WARN L193 SmtUtils]: Spent 213.00 ms on a formula simplification that was a NOOP. DAG size: 139 [2020-10-28 18:26:51,679 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 18:26:51,679 INFO L93 Difference]: Finished difference Result 509 states and 750 transitions. [2020-10-28 18:26:51,679 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-28 18:26:51,680 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 55 [2020-10-28 18:26:51,680 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 18:26:51,685 INFO L225 Difference]: With dead ends: 509 [2020-10-28 18:26:51,685 INFO L226 Difference]: Without dead ends: 426 [2020-10-28 18:26:51,687 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=52, Invalid=104, Unknown=0, NotChecked=0, Total=156 [2020-10-28 18:26:51,689 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 426 states. [2020-10-28 18:26:51,742 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 426 to 283. [2020-10-28 18:26:51,743 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 283 states. [2020-10-28 18:26:51,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 283 states to 283 states and 411 transitions. [2020-10-28 18:26:51,745 INFO L78 Accepts]: Start accepts. Automaton has 283 states and 411 transitions. Word has length 55 [2020-10-28 18:26:51,747 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 18:26:51,747 INFO L481 AbstractCegarLoop]: Abstraction has 283 states and 411 transitions. [2020-10-28 18:26:51,747 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-28 18:26:51,748 INFO L276 IsEmpty]: Start isEmpty. Operand 283 states and 411 transitions. [2020-10-28 18:26:51,750 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-10-28 18:26:51,750 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 18:26:51,753 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 18:26:51,753 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-28 18:26:51,754 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 18:26:51,754 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 18:26:51,754 INFO L82 PathProgramCache]: Analyzing trace with hash -1749490701, now seen corresponding path program 1 times [2020-10-28 18:26:51,754 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 18:26:51,755 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1795956105] [2020-10-28 18:26:51,755 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 18:26:51,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:26:51,817 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:26:51,854 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:26:51,899 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:26:51,937 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:26:51,977 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:26:52,494 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:26:52,552 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:26:52,664 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:26:53,011 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:26:53,104 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:26:56,799 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:26:56,799 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 63 [2020-10-28 18:26:56,800 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 10 [2020-10-28 18:26:56,800 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-10-28 18:26:56,800 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:26:56,800 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:26:56,800 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 18:26:56,801 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-28 18:26:56,801 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 43 [2020-10-28 18:26:56,801 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:26:57,062 WARN L193 SmtUtils]: Spent 165.00 ms on a formula simplification that was a NOOP. DAG size: 136 [2020-10-28 18:26:57,063 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 18:26:57,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:26:57,082 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:26:57,106 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:26:57,107 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 18:26:57,107 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 18:26:57,107 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 29 [2020-10-28 18:26:57,107 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:26:57,107 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:26:57,108 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 18:26:57,108 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 18:26:57,108 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 18:26:57,108 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:26:57,126 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 18:26:57,127 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1795956105] [2020-10-28 18:26:57,127 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 18:26:57,127 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-28 18:26:57,128 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2054890425] [2020-10-28 18:26:57,128 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-28 18:26:57,128 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 18:26:57,129 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-28 18:26:57,130 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-28 18:26:57,130 INFO L87 Difference]: Start difference. First operand 283 states and 411 transitions. Second operand 6 states. [2020-10-28 18:26:57,374 WARN L193 SmtUtils]: Spent 192.00 ms on a formula simplification that was a NOOP. DAG size: 143 [2020-10-28 18:26:57,866 WARN L193 SmtUtils]: Spent 187.00 ms on a formula simplification that was a NOOP. DAG size: 141 [2020-10-28 18:26:58,098 WARN L193 SmtUtils]: Spent 182.00 ms on a formula simplification that was a NOOP. DAG size: 139 [2020-10-28 18:26:58,312 WARN L193 SmtUtils]: Spent 184.00 ms on a formula simplification that was a NOOP. DAG size: 138 [2020-10-28 18:26:58,574 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 18:26:58,574 INFO L93 Difference]: Finished difference Result 689 states and 1019 transitions. [2020-10-28 18:26:58,575 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-28 18:26:58,575 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 55 [2020-10-28 18:26:58,575 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 18:26:58,579 INFO L225 Difference]: With dead ends: 689 [2020-10-28 18:26:58,579 INFO L226 Difference]: Without dead ends: 570 [2020-10-28 18:26:58,584 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=52, Invalid=104, Unknown=0, NotChecked=0, Total=156 [2020-10-28 18:26:58,585 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 570 states. [2020-10-28 18:26:58,621 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 570 to 416. [2020-10-28 18:26:58,622 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 416 states. [2020-10-28 18:26:58,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 416 states to 416 states and 613 transitions. [2020-10-28 18:26:58,625 INFO L78 Accepts]: Start accepts. Automaton has 416 states and 613 transitions. Word has length 55 [2020-10-28 18:26:58,627 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 18:26:58,627 INFO L481 AbstractCegarLoop]: Abstraction has 416 states and 613 transitions. [2020-10-28 18:26:58,627 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-28 18:26:58,628 INFO L276 IsEmpty]: Start isEmpty. Operand 416 states and 613 transitions. [2020-10-28 18:26:58,635 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-10-28 18:26:58,636 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 18:26:58,636 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 18:26:58,636 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-28 18:26:58,637 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 18:26:58,637 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 18:26:58,637 INFO L82 PathProgramCache]: Analyzing trace with hash -1517833072, now seen corresponding path program 1 times [2020-10-28 18:26:58,638 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 18:26:58,638 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1352308667] [2020-10-28 18:26:58,638 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 18:26:58,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:26:58,708 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:26:58,758 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:26:58,809 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:26:58,855 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:26:58,921 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:26:58,965 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:26:59,307 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:27:01,483 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:27:01,653 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:27:01,755 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:27:01,809 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:27:02,042 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:27:02,087 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:27:02,452 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:27:02,639 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:27:02,668 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:27:02,986 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:27:03,320 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:27:03,688 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:27:03,689 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 63 [2020-10-28 18:27:03,689 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 18 [2020-10-28 18:27:03,689 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-10-28 18:27:03,689 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:27:03,689 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:27:03,690 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-28 18:27:03,690 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-28 18:27:03,690 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 42 [2020-10-28 18:27:03,690 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 18:27:04,077 WARN L193 SmtUtils]: Spent 171.00 ms on a formula simplification that was a NOOP. DAG size: 136 [2020-10-28 18:27:04,079 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 18:27:04,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:27:04,096 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:27:04,118 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:27:04,119 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 18:27:04,119 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 18:27:04,119 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 27 [2020-10-28 18:27:04,119 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:27:04,120 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:27:04,120 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 18:27:04,120 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 18:27:04,120 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-28 18:27:04,120 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:27:04,145 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 18:27:04,146 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1352308667] [2020-10-28 18:27:04,146 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 18:27:04,146 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-28 18:27:04,146 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1815462875] [2020-10-28 18:27:04,148 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-28 18:27:04,148 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 18:27:04,159 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-28 18:27:04,160 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2020-10-28 18:27:04,160 INFO L87 Difference]: Start difference. First operand 416 states and 613 transitions. Second operand 8 states. [2020-10-28 18:27:04,362 WARN L193 SmtUtils]: Spent 162.00 ms on a formula simplification that was a NOOP. DAG size: 140 [2020-10-28 18:27:04,996 WARN L193 SmtUtils]: Spent 186.00 ms on a formula simplification that was a NOOP. DAG size: 143 [2020-10-28 18:27:05,721 WARN L193 SmtUtils]: Spent 204.00 ms on a formula simplification that was a NOOP. DAG size: 142 [2020-10-28 18:27:05,950 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 18:27:05,950 INFO L93 Difference]: Finished difference Result 2418 states and 3627 transitions. [2020-10-28 18:27:05,951 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-28 18:27:05,951 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 55 [2020-10-28 18:27:05,951 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 18:27:05,962 INFO L225 Difference]: With dead ends: 2418 [2020-10-28 18:27:05,962 INFO L226 Difference]: Without dead ends: 2046 [2020-10-28 18:27:05,966 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=123, Invalid=339, Unknown=0, NotChecked=0, Total=462 [2020-10-28 18:27:05,969 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2046 states. [2020-10-28 18:27:06,030 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2046 to 425. [2020-10-28 18:27:06,030 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 425 states. [2020-10-28 18:27:06,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 425 states to 425 states and 614 transitions. [2020-10-28 18:27:06,033 INFO L78 Accepts]: Start accepts. Automaton has 425 states and 614 transitions. Word has length 55 [2020-10-28 18:27:06,033 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 18:27:06,033 INFO L481 AbstractCegarLoop]: Abstraction has 425 states and 614 transitions. [2020-10-28 18:27:06,033 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-28 18:27:06,034 INFO L276 IsEmpty]: Start isEmpty. Operand 425 states and 614 transitions. [2020-10-28 18:27:06,036 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-10-28 18:27:06,036 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 18:27:06,036 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 18:27:06,036 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-28 18:27:06,037 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 18:27:06,037 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 18:27:06,037 INFO L82 PathProgramCache]: Analyzing trace with hash 33759509, now seen corresponding path program 1 times [2020-10-28 18:27:06,037 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 18:27:06,038 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [693926348] [2020-10-28 18:27:06,038 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 18:27:06,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:27:06,078 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:27:06,103 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:27:06,133 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:27:06,177 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:27:06,251 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:27:06,708 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:27:07,504 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:27:07,538 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:27:07,978 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:27:08,449 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:27:11,062 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:27:11,062 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 64 [2020-10-28 18:27:11,062 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 10 [2020-10-28 18:27:11,062 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-28 18:27:11,063 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:27:11,063 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:27:11,063 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 18:27:11,063 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 18 [2020-10-28 18:27:11,063 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 40 [2020-10-28 18:27:11,063 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:27:11,325 WARN L193 SmtUtils]: Spent 194.00 ms on a formula simplification that was a NOOP. DAG size: 136 [2020-10-28 18:27:11,326 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 18:27:11,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:27:11,333 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:27:11,347 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:27:11,348 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 18:27:11,348 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 18:27:11,348 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 16 [2020-10-28 18:27:11,349 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:27:11,349 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:27:11,349 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 18:27:11,349 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 18:27:11,350 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 18:27:11,350 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 18:27:11,374 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 18:27:11,375 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [693926348] [2020-10-28 18:27:11,376 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 18:27:11,377 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-28 18:27:11,377 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1449216912] [2020-10-28 18:27:11,377 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-28 18:27:11,378 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 18:27:11,378 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-28 18:27:11,379 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-28 18:27:11,379 INFO L87 Difference]: Start difference. First operand 425 states and 614 transitions. Second operand 6 states. [2020-10-28 18:27:11,650 WARN L193 SmtUtils]: Spent 207.00 ms on a formula simplification that was a NOOP. DAG size: 143 [2020-10-28 18:27:12,089 WARN L193 SmtUtils]: Spent 177.00 ms on a formula simplification that was a NOOP. DAG size: 141 [2020-10-28 18:27:12,298 WARN L193 SmtUtils]: Spent 181.00 ms on a formula simplification that was a NOOP. DAG size: 139 [2020-10-28 18:27:12,539 WARN L193 SmtUtils]: Spent 188.00 ms on a formula simplification that was a NOOP. DAG size: 138 [2020-10-28 18:27:12,800 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 18:27:12,800 INFO L93 Difference]: Finished difference Result 812 states and 1184 transitions. [2020-10-28 18:27:12,801 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-28 18:27:12,801 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 56 [2020-10-28 18:27:12,801 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 18:27:12,805 INFO L225 Difference]: With dead ends: 812 [2020-10-28 18:27:12,805 INFO L226 Difference]: Without dead ends: 693 [2020-10-28 18:27:12,806 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=52, Invalid=104, Unknown=0, NotChecked=0, Total=156 [2020-10-28 18:27:12,807 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 693 states. [2020-10-28 18:27:12,857 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 693 to 516. [2020-10-28 18:27:12,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 516 states. [2020-10-28 18:27:12,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 516 states to 516 states and 751 transitions. [2020-10-28 18:27:12,860 INFO L78 Accepts]: Start accepts. Automaton has 516 states and 751 transitions. Word has length 56 [2020-10-28 18:27:12,861 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 18:27:12,861 INFO L481 AbstractCegarLoop]: Abstraction has 516 states and 751 transitions. [2020-10-28 18:27:12,861 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-28 18:27:12,861 INFO L276 IsEmpty]: Start isEmpty. Operand 516 states and 751 transitions. [2020-10-28 18:27:12,862 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-10-28 18:27:12,862 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 18:27:12,862 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 18:27:12,862 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-28 18:27:12,862 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 18:27:12,863 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 18:27:12,863 INFO L82 PathProgramCache]: Analyzing trace with hash 621607731, now seen corresponding path program 1 times [2020-10-28 18:27:12,863 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 18:27:12,863 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [253255043] [2020-10-28 18:27:12,863 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 18:27:12,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:27:12,902 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:27:12,930 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:27:12,953 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:27:13,040 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:27:13,165 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:27:13,340 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:27:13,452 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:27:16,310 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:27:16,328 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:27:16,474 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:27:16,728 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:27:16,765 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:27:17,056 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:27:17,241 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:27:17,284 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:27:17,409 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:27:17,676 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:27:17,736 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:27:17,850 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:27:17,891 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:27:17,891 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 64 [2020-10-28 18:27:17,892 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 19 [2020-10-28 18:27:17,892 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-28 18:27:17,892 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:27:17,893 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:27:17,893 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 18:27:17,893 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-28 18:27:17,893 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 33 [2020-10-28 18:27:17,893 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 18:27:18,109 WARN L193 SmtUtils]: Spent 167.00 ms on a formula simplification that was a NOOP. DAG size: 136 [2020-10-28 18:27:18,111 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 18:27:18,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:27:18,130 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:27:18,148 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:27:18,149 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 18:27:18,149 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 18:27:18,149 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 22 [2020-10-28 18:27:18,149 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:27:18,150 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:27:18,150 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 18:27:18,150 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 18:27:18,150 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-28 18:27:18,150 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:27:18,166 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 18:27:18,167 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [253255043] [2020-10-28 18:27:18,167 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 18:27:18,167 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-28 18:27:18,169 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2114677155] [2020-10-28 18:27:18,169 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-28 18:27:18,175 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 18:27:18,176 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-28 18:27:18,176 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-28 18:27:18,176 INFO L87 Difference]: Start difference. First operand 516 states and 751 transitions. Second operand 6 states. [2020-10-28 18:27:18,419 WARN L193 SmtUtils]: Spent 200.00 ms on a formula simplification that was a NOOP. DAG size: 142 [2020-10-28 18:27:18,884 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 18:27:18,884 INFO L93 Difference]: Finished difference Result 946 states and 1400 transitions. [2020-10-28 18:27:18,885 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-28 18:27:18,885 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 56 [2020-10-28 18:27:18,885 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 18:27:18,888 INFO L225 Difference]: With dead ends: 946 [2020-10-28 18:27:18,888 INFO L226 Difference]: Without dead ends: 497 [2020-10-28 18:27:18,890 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2020-10-28 18:27:18,891 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 497 states. [2020-10-28 18:27:18,944 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 497 to 497. [2020-10-28 18:27:18,944 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 497 states. [2020-10-28 18:27:18,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 497 states to 497 states and 721 transitions. [2020-10-28 18:27:18,948 INFO L78 Accepts]: Start accepts. Automaton has 497 states and 721 transitions. Word has length 56 [2020-10-28 18:27:18,948 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 18:27:18,948 INFO L481 AbstractCegarLoop]: Abstraction has 497 states and 721 transitions. [2020-10-28 18:27:18,949 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-28 18:27:18,949 INFO L276 IsEmpty]: Start isEmpty. Operand 497 states and 721 transitions. [2020-10-28 18:27:18,949 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-10-28 18:27:18,949 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 18:27:18,949 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 18:27:18,950 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-28 18:27:18,950 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 18:27:18,950 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 18:27:18,950 INFO L82 PathProgramCache]: Analyzing trace with hash 1476337486, now seen corresponding path program 1 times [2020-10-28 18:27:18,951 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 18:27:18,951 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1578285879] [2020-10-28 18:27:18,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 18:27:18,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:27:18,992 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:27:19,029 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:27:19,060 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:27:19,159 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:27:19,457 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:27:20,160 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:27:20,233 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:27:20,252 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:27:20,287 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:27:20,376 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:27:20,431 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:27:20,474 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:27:20,570 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:27:20,678 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:27:21,195 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:27:21,227 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:27:21,565 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:27:21,674 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:27:23,697 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:27:23,757 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:27:23,778 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:27:23,839 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:27:23,907 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:27:23,993 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:27:24,005 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:27:24,005 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 65 [2020-10-28 18:27:24,006 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 24 [2020-10-28 18:27:24,006 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5026 [2020-10-28 18:27:24,006 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:27:24,006 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:27:24,006 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-28 18:27:24,006 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 18:27:24,006 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 37 [2020-10-28 18:27:24,007 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:27:24,259 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 25 [2020-10-28 18:27:24,449 WARN L193 SmtUtils]: Spent 156.00 ms on a formula simplification that was a NOOP. DAG size: 136 [2020-10-28 18:27:24,450 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 18:27:24,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:27:24,462 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:27:24,468 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:27:24,469 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 18:27:24,469 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 18:27:24,470 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-28 18:27:24,470 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:27:24,470 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:27:24,470 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 18:27:24,470 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 18:27:24,470 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 18:27:24,471 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:27:24,488 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 18:27:24,488 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1578285879] [2020-10-28 18:27:24,488 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 18:27:24,489 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-10-28 18:27:24,489 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1962462177] [2020-10-28 18:27:24,490 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-28 18:27:24,491 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 18:27:24,492 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-28 18:27:24,493 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-10-28 18:27:24,493 INFO L87 Difference]: Start difference. First operand 497 states and 721 transitions. Second operand 8 states. [2020-10-28 18:27:24,739 WARN L193 SmtUtils]: Spent 179.00 ms on a formula simplification that was a NOOP. DAG size: 146 [2020-10-28 18:27:25,420 WARN L193 SmtUtils]: Spent 184.00 ms on a formula simplification that was a NOOP. DAG size: 144 [2020-10-28 18:27:25,845 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 18:27:25,846 INFO L93 Difference]: Finished difference Result 1342 states and 1975 transitions. [2020-10-28 18:27:25,846 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-28 18:27:25,846 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 57 [2020-10-28 18:27:25,847 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 18:27:25,851 INFO L225 Difference]: With dead ends: 1342 [2020-10-28 18:27:25,852 INFO L226 Difference]: Without dead ends: 912 [2020-10-28 18:27:25,854 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=64, Invalid=176, Unknown=0, NotChecked=0, Total=240 [2020-10-28 18:27:25,855 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 912 states. [2020-10-28 18:27:25,936 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 912 to 497. [2020-10-28 18:27:25,936 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 497 states. [2020-10-28 18:27:25,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 497 states to 497 states and 720 transitions. [2020-10-28 18:27:25,939 INFO L78 Accepts]: Start accepts. Automaton has 497 states and 720 transitions. Word has length 57 [2020-10-28 18:27:25,939 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 18:27:25,939 INFO L481 AbstractCegarLoop]: Abstraction has 497 states and 720 transitions. [2020-10-28 18:27:25,940 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-28 18:27:25,940 INFO L276 IsEmpty]: Start isEmpty. Operand 497 states and 720 transitions. [2020-10-28 18:27:25,940 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-10-28 18:27:25,940 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 18:27:25,941 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 18:27:25,941 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-28 18:27:25,941 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 18:27:25,941 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 18:27:25,942 INFO L82 PathProgramCache]: Analyzing trace with hash 128327480, now seen corresponding path program 1 times [2020-10-28 18:27:25,942 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 18:27:25,942 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1310310622] [2020-10-28 18:27:25,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 18:27:25,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:27:25,984 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:27:26,025 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:27:26,065 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:27:26,325 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:27:26,391 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:27:26,623 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:27:26,690 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:27:27,384 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:27:27,411 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:27:30,970 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:27:30,970 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 65 [2020-10-28 18:27:30,970 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-28 18:27:30,970 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-28 18:27:30,971 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:27:30,971 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:27:30,971 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 18:27:30,971 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-28 18:27:30,971 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 35 [2020-10-28 18:27:30,971 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:27:31,190 WARN L193 SmtUtils]: Spent 165.00 ms on a formula simplification that was a NOOP. DAG size: 136 [2020-10-28 18:27:31,191 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 18:27:31,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:27:31,198 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:27:31,209 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:27:31,209 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 18:27:31,210 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 18:27:31,210 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12 [2020-10-28 18:27:31,210 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:27:31,210 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:27:31,210 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 18:27:31,210 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 18:27:31,211 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 18:27:31,211 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:27:31,221 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 18:27:31,221 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1310310622] [2020-10-28 18:27:31,222 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 18:27:31,222 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-28 18:27:31,222 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [213330820] [2020-10-28 18:27:31,222 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-28 18:27:31,223 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 18:27:31,223 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-28 18:27:31,223 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-28 18:27:31,224 INFO L87 Difference]: Start difference. First operand 497 states and 720 transitions. Second operand 6 states. [2020-10-28 18:27:31,439 WARN L193 SmtUtils]: Spent 184.00 ms on a formula simplification that was a NOOP. DAG size: 137 [2020-10-28 18:27:32,001 WARN L193 SmtUtils]: Spent 169.00 ms on a formula simplification that was a NOOP. DAG size: 137 [2020-10-28 18:27:32,834 WARN L193 SmtUtils]: Spent 173.00 ms on a formula simplification that was a NOOP. DAG size: 138 [2020-10-28 18:27:33,068 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 18:27:33,069 INFO L93 Difference]: Finished difference Result 2516 states and 3733 transitions. [2020-10-28 18:27:33,069 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-28 18:27:33,069 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 57 [2020-10-28 18:27:33,069 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 18:27:33,081 INFO L225 Difference]: With dead ends: 2516 [2020-10-28 18:27:33,081 INFO L226 Difference]: Without dead ends: 2098 [2020-10-28 18:27:33,083 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2020-10-28 18:27:33,086 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2098 states. [2020-10-28 18:27:33,319 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2098 to 1514. [2020-10-28 18:27:33,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1514 states. [2020-10-28 18:27:33,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1514 states to 1514 states and 2226 transitions. [2020-10-28 18:27:33,327 INFO L78 Accepts]: Start accepts. Automaton has 1514 states and 2226 transitions. Word has length 57 [2020-10-28 18:27:33,327 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 18:27:33,327 INFO L481 AbstractCegarLoop]: Abstraction has 1514 states and 2226 transitions. [2020-10-28 18:27:33,327 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-28 18:27:33,327 INFO L276 IsEmpty]: Start isEmpty. Operand 1514 states and 2226 transitions. [2020-10-28 18:27:33,328 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-10-28 18:27:33,328 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 18:27:33,328 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 18:27:33,329 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-28 18:27:33,329 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 18:27:33,329 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 18:27:33,329 INFO L82 PathProgramCache]: Analyzing trace with hash -1495381923, now seen corresponding path program 1 times [2020-10-28 18:27:33,330 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 18:27:33,330 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1660393646] [2020-10-28 18:27:33,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 18:27:33,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:27:33,364 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:27:33,398 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:27:33,448 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:27:33,500 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:27:33,819 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:27:33,850 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:27:34,040 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:27:34,122 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:27:34,282 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:27:34,344 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:27:35,582 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:27:35,618 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:27:35,816 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:27:35,854 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:27:38,358 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:27:38,358 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 66 [2020-10-28 18:27:38,358 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 14 [2020-10-28 18:27:38,358 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5006 [2020-10-28 18:27:38,358 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:27:38,359 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:27:38,359 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 18:27:38,359 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-28 18:27:38,359 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 31 [2020-10-28 18:27:38,359 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:27:38,600 WARN L193 SmtUtils]: Spent 176.00 ms on a formula simplification that was a NOOP. DAG size: 136 [2020-10-28 18:27:38,601 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 18:27:38,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:27:38,614 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:27:38,628 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:27:38,628 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 18:27:38,628 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 18:27:38,628 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 17 [2020-10-28 18:27:38,629 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:27:38,629 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:27:38,629 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 18:27:38,629 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 18:27:38,629 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-28 18:27:38,629 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:27:38,644 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 18:27:38,645 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1660393646] [2020-10-28 18:27:38,645 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 18:27:38,645 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-28 18:27:38,645 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1644098893] [2020-10-28 18:27:38,646 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-28 18:27:38,646 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 18:27:38,646 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-28 18:27:38,647 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-10-28 18:27:38,647 INFO L87 Difference]: Start difference. First operand 1514 states and 2226 transitions. Second operand 6 states. [2020-10-28 18:27:38,895 WARN L193 SmtUtils]: Spent 198.00 ms on a formula simplification that was a NOOP. DAG size: 145 [2020-10-28 18:27:39,345 WARN L193 SmtUtils]: Spent 170.00 ms on a formula simplification that was a NOOP. DAG size: 143 [2020-10-28 18:27:39,867 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 18:27:39,867 INFO L93 Difference]: Finished difference Result 4353 states and 6421 transitions. [2020-10-28 18:27:39,868 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-28 18:27:39,868 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 58 [2020-10-28 18:27:39,868 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 18:27:39,883 INFO L225 Difference]: With dead ends: 4353 [2020-10-28 18:27:39,883 INFO L226 Difference]: Without dead ends: 2874 [2020-10-28 18:27:39,888 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2020-10-28 18:27:39,892 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2874 states. [2020-10-28 18:27:40,308 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2874 to 2869. [2020-10-28 18:27:40,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2869 states. [2020-10-28 18:27:40,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2869 states to 2869 states and 4192 transitions. [2020-10-28 18:27:40,321 INFO L78 Accepts]: Start accepts. Automaton has 2869 states and 4192 transitions. Word has length 58 [2020-10-28 18:27:40,321 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 18:27:40,321 INFO L481 AbstractCegarLoop]: Abstraction has 2869 states and 4192 transitions. [2020-10-28 18:27:40,321 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-28 18:27:40,321 INFO L276 IsEmpty]: Start isEmpty. Operand 2869 states and 4192 transitions. [2020-10-28 18:27:40,322 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2020-10-28 18:27:40,322 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 18:27:40,322 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] [2020-10-28 18:27:40,323 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-28 18:27:40,323 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 18:27:40,323 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 18:27:40,323 INFO L82 PathProgramCache]: Analyzing trace with hash -272482679, now seen corresponding path program 1 times [2020-10-28 18:27:40,324 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 18:27:40,324 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [38931925] [2020-10-28 18:27:40,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 18:27:40,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:27:40,362 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:27:40,412 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:27:40,450 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:27:40,504 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:27:40,697 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:27:41,013 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:27:41,087 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:27:41,463 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:27:41,538 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:27:41,982 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:27:42,360 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:27:42,875 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:27:42,945 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:27:45,352 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:27:45,353 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 67 [2020-10-28 18:27:45,353 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 13 [2020-10-28 18:27:45,353 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5006 [2020-10-28 18:27:45,353 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:27:45,353 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:27:45,353 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-28 18:27:45,353 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-28 18:27:45,354 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 53 [2020-10-28 18:27:45,354 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:27:45,717 WARN L193 SmtUtils]: Spent 185.00 ms on a formula simplification that was a NOOP. DAG size: 136 [2020-10-28 18:27:45,720 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 18:27:45,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:27:45,730 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:27:45,767 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:27:45,768 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 18:27:45,768 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 18:27:45,768 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 40 [2020-10-28 18:27:45,768 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:27:45,768 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:27:45,769 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 18:27:45,769 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 18:27:45,769 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-28 18:27:45,769 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:27:45,788 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 18:27:45,789 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [38931925] [2020-10-28 18:27:45,789 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 18:27:45,789 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-10-28 18:27:45,790 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2075126306] [2020-10-28 18:27:45,790 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-28 18:27:45,790 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 18:27:45,791 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-28 18:27:45,791 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2020-10-28 18:27:45,791 INFO L87 Difference]: Start difference. First operand 2869 states and 4192 transitions. Second operand 11 states. [2020-10-28 18:27:46,149 WARN L193 SmtUtils]: Spent 271.00 ms on a formula simplification that was a NOOP. DAG size: 148 [2020-10-28 18:27:47,064 WARN L193 SmtUtils]: Spent 232.00 ms on a formula simplification that was a NOOP. DAG size: 144 [2020-10-28 18:27:47,309 WARN L193 SmtUtils]: Spent 191.00 ms on a formula simplification that was a NOOP. DAG size: 140 [2020-10-28 18:27:48,279 WARN L193 SmtUtils]: Spent 201.00 ms on a formula simplification that was a NOOP. DAG size: 142 [2020-10-28 18:27:48,847 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 18:27:48,847 INFO L93 Difference]: Finished difference Result 9596 states and 14092 transitions. [2020-10-28 18:27:48,848 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-28 18:27:48,848 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 59 [2020-10-28 18:27:48,848 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 18:27:48,878 INFO L225 Difference]: With dead ends: 9596 [2020-10-28 18:27:48,879 INFO L226 Difference]: Without dead ends: 6894 [2020-10-28 18:27:48,887 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 167 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=184, Invalid=628, Unknown=0, NotChecked=0, Total=812 [2020-10-28 18:27:48,896 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6894 states. [2020-10-28 18:27:49,402 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6894 to 2869. [2020-10-28 18:27:49,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2869 states. [2020-10-28 18:27:49,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2869 states to 2869 states and 4183 transitions. [2020-10-28 18:27:49,410 INFO L78 Accepts]: Start accepts. Automaton has 2869 states and 4183 transitions. Word has length 59 [2020-10-28 18:27:49,411 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 18:27:49,411 INFO L481 AbstractCegarLoop]: Abstraction has 2869 states and 4183 transitions. [2020-10-28 18:27:49,411 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-28 18:27:49,411 INFO L276 IsEmpty]: Start isEmpty. Operand 2869 states and 4183 transitions. [2020-10-28 18:27:49,412 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2020-10-28 18:27:49,412 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 18:27:49,412 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 18:27:49,412 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-28 18:27:49,413 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 18:27:49,413 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 18:27:49,413 INFO L82 PathProgramCache]: Analyzing trace with hash 573573813, now seen corresponding path program 1 times [2020-10-28 18:27:49,413 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 18:27:49,414 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [300982496] [2020-10-28 18:27:49,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 18:27:49,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:27:49,447 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:27:49,478 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:27:50,166 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:27:50,166 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 67 [2020-10-28 18:27:50,166 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 18:27:50,166 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 731 [2020-10-28 18:27:50,166 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:27:50,167 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:27:50,167 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 18:27:50,167 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-28 18:27:50,167 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 27 [2020-10-28 18:27:50,167 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:27:50,403 WARN L193 SmtUtils]: Spent 185.00 ms on a formula simplification that was a NOOP. DAG size: 136 [2020-10-28 18:27:50,404 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 18:27:50,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:27:50,417 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:27:50,427 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:27:50,428 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 18:27:50,428 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 18:27:50,428 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 13 [2020-10-28 18:27:50,428 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:27:50,428 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:27:50,428 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 18:27:50,428 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 18:27:50,429 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-28 18:27:50,429 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:27:50,437 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 18:27:50,437 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [300982496] [2020-10-28 18:27:50,438 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 18:27:50,438 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-28 18:27:50,438 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1364476444] [2020-10-28 18:27:50,438 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-28 18:27:50,439 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 18:27:50,439 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-28 18:27:50,439 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-28 18:27:50,439 INFO L87 Difference]: Start difference. First operand 2869 states and 4183 transitions. Second operand 6 states. [2020-10-28 18:27:50,693 WARN L193 SmtUtils]: Spent 209.00 ms on a formula simplification that was a NOOP. DAG size: 144 [2020-10-28 18:27:51,220 WARN L193 SmtUtils]: Spent 199.00 ms on a formula simplification that was a NOOP. DAG size: 142 [2020-10-28 18:27:51,852 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 18:27:51,852 INFO L93 Difference]: Finished difference Result 4383 states and 6423 transitions. [2020-10-28 18:27:51,855 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-28 18:27:51,855 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 59 [2020-10-28 18:27:51,856 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 18:27:51,865 INFO L225 Difference]: With dead ends: 4383 [2020-10-28 18:27:51,865 INFO L226 Difference]: Without dead ends: 2037 [2020-10-28 18:27:51,871 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2020-10-28 18:27:51,874 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2037 states. [2020-10-28 18:27:52,126 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2037 to 1655. [2020-10-28 18:27:52,127 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1655 states. [2020-10-28 18:27:52,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1655 states to 1655 states and 2393 transitions. [2020-10-28 18:27:52,131 INFO L78 Accepts]: Start accepts. Automaton has 1655 states and 2393 transitions. Word has length 59 [2020-10-28 18:27:52,131 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 18:27:52,131 INFO L481 AbstractCegarLoop]: Abstraction has 1655 states and 2393 transitions. [2020-10-28 18:27:52,131 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-28 18:27:52,131 INFO L276 IsEmpty]: Start isEmpty. Operand 1655 states and 2393 transitions. [2020-10-28 18:27:52,132 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2020-10-28 18:27:52,132 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 18:27:52,132 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 18:27:52,133 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-28 18:27:52,133 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 18:27:52,133 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 18:27:52,133 INFO L82 PathProgramCache]: Analyzing trace with hash -738034022, now seen corresponding path program 1 times [2020-10-28 18:27:52,134 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 18:27:52,134 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1357579547] [2020-10-28 18:27:52,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 18:27:52,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:27:52,173 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:27:52,235 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:27:52,317 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:27:52,872 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:27:53,109 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:27:54,933 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:27:54,934 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 68 [2020-10-28 18:27:54,934 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-28 18:27:54,934 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2776 [2020-10-28 18:27:54,934 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:27:54,934 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:27:54,934 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-28 18:27:54,934 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-28 18:27:54,935 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 49 [2020-10-28 18:27:54,935 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:27:55,278 WARN L193 SmtUtils]: Spent 170.00 ms on a formula simplification that was a NOOP. DAG size: 136 [2020-10-28 18:27:55,278 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 18:27:55,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:27:55,291 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:27:55,300 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:27:55,300 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 18:27:55,301 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 18:27:55,301 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12 [2020-10-28 18:27:55,301 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:27:55,301 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:27:55,301 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 18:27:55,301 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 18:27:55,301 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-28 18:27:55,301 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:27:55,315 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 18:27:55,316 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1357579547] [2020-10-28 18:27:55,316 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 18:27:55,316 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-10-28 18:27:55,316 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1497640649] [2020-10-28 18:27:55,318 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-28 18:27:55,318 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 18:27:55,319 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-28 18:27:55,319 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2020-10-28 18:27:55,319 INFO L87 Difference]: Start difference. First operand 1655 states and 2393 transitions. Second operand 11 states. [2020-10-28 18:27:55,588 WARN L193 SmtUtils]: Spent 201.00 ms on a formula simplification that was a NOOP. DAG size: 148 [2020-10-28 18:27:56,439 WARN L193 SmtUtils]: Spent 188.00 ms on a formula simplification that was a NOOP. DAG size: 140 [2020-10-28 18:27:56,688 WARN L193 SmtUtils]: Spent 208.00 ms on a formula simplification that was a NOOP. DAG size: 144 [2020-10-28 18:27:57,770 WARN L193 SmtUtils]: Spent 186.00 ms on a formula simplification that was a NOOP. DAG size: 142 [2020-10-28 18:27:58,101 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 18:27:58,101 INFO L93 Difference]: Finished difference Result 5097 states and 7432 transitions. [2020-10-28 18:27:58,101 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-28 18:27:58,102 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 60 [2020-10-28 18:27:58,102 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 18:27:58,114 INFO L225 Difference]: With dead ends: 5097 [2020-10-28 18:27:58,114 INFO L226 Difference]: Without dead ends: 3554 [2020-10-28 18:27:58,118 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 162 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=184, Invalid=628, Unknown=0, NotChecked=0, Total=812 [2020-10-28 18:27:58,122 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3554 states. [2020-10-28 18:27:58,472 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3554 to 1655. [2020-10-28 18:27:58,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1655 states. [2020-10-28 18:27:58,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1655 states to 1655 states and 2391 transitions. [2020-10-28 18:27:58,477 INFO L78 Accepts]: Start accepts. Automaton has 1655 states and 2391 transitions. Word has length 60 [2020-10-28 18:27:58,477 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 18:27:58,477 INFO L481 AbstractCegarLoop]: Abstraction has 1655 states and 2391 transitions. [2020-10-28 18:27:58,477 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-28 18:27:58,477 INFO L276 IsEmpty]: Start isEmpty. Operand 1655 states and 2391 transitions. [2020-10-28 18:27:58,478 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-10-28 18:27:58,478 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 18:27:58,478 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 18:27:58,478 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-28 18:27:58,479 INFO L429 AbstractCegarLoop]: === Iteration 14 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 18:27:58,479 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 18:27:58,479 INFO L82 PathProgramCache]: Analyzing trace with hash 836657653, now seen corresponding path program 1 times [2020-10-28 18:27:58,479 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 18:27:58,480 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1686797578] [2020-10-28 18:27:58,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 18:27:58,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:27:58,527 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:27:58,634 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:27:58,676 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:27:59,001 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:27:59,745 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:27:59,746 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 69 [2020-10-28 18:27:59,746 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-28 18:27:59,746 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1237 [2020-10-28 18:27:59,746 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:27:59,746 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:27:59,746 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-28 18:27:59,746 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 18:27:59,746 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 49 [2020-10-28 18:27:59,746 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:28:00,188 WARN L193 SmtUtils]: Spent 181.00 ms on a formula simplification that was a NOOP. DAG size: 136 [2020-10-28 18:28:00,189 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 18:28:00,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:28:00,195 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:28:00,200 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:28:00,200 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 18:28:00,201 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 18:28:00,201 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-28 18:28:00,201 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:28:00,201 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:28:00,201 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 18:28:00,201 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 18:28:00,201 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 18:28:00,201 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:28:00,216 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 18:28:00,216 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1686797578] [2020-10-28 18:28:00,216 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 18:28:00,216 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-10-28 18:28:00,216 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [165923435] [2020-10-28 18:28:00,217 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-28 18:28:00,217 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 18:28:00,217 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-28 18:28:00,217 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2020-10-28 18:28:00,218 INFO L87 Difference]: Start difference. First operand 1655 states and 2391 transitions. Second operand 10 states. [2020-10-28 18:28:00,487 WARN L193 SmtUtils]: Spent 196.00 ms on a formula simplification that was a NOOP. DAG size: 145 [2020-10-28 18:28:01,492 WARN L193 SmtUtils]: Spent 218.00 ms on a formula simplification that was a NOOP. DAG size: 147 [2020-10-28 18:28:01,720 WARN L193 SmtUtils]: Spent 201.00 ms on a formula simplification that was a NOOP. DAG size: 148 [2020-10-28 18:28:02,511 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 18:28:02,511 INFO L93 Difference]: Finished difference Result 3177 states and 4619 transitions. [2020-10-28 18:28:02,511 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-28 18:28:02,511 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 61 [2020-10-28 18:28:02,512 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 18:28:02,522 INFO L225 Difference]: With dead ends: 3177 [2020-10-28 18:28:02,522 INFO L226 Difference]: Without dead ends: 2398 [2020-10-28 18:28:02,525 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=89, Invalid=291, Unknown=0, NotChecked=0, Total=380 [2020-10-28 18:28:02,527 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2398 states. [2020-10-28 18:28:02,805 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2398 to 1631. [2020-10-28 18:28:02,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1631 states. [2020-10-28 18:28:02,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1631 states to 1631 states and 2355 transitions. [2020-10-28 18:28:02,809 INFO L78 Accepts]: Start accepts. Automaton has 1631 states and 2355 transitions. Word has length 61 [2020-10-28 18:28:02,809 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 18:28:02,809 INFO L481 AbstractCegarLoop]: Abstraction has 1631 states and 2355 transitions. [2020-10-28 18:28:02,809 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-28 18:28:02,809 INFO L276 IsEmpty]: Start isEmpty. Operand 1631 states and 2355 transitions. [2020-10-28 18:28:02,810 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-10-28 18:28:02,810 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 18:28:02,810 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 18:28:02,811 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-28 18:28:02,811 INFO L429 AbstractCegarLoop]: === Iteration 15 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 18:28:02,811 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 18:28:02,811 INFO L82 PathProgramCache]: Analyzing trace with hash -2065198732, now seen corresponding path program 1 times [2020-10-28 18:28:02,812 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 18:28:02,812 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1560560573] [2020-10-28 18:28:02,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 18:28:02,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:28:02,855 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:28:02,977 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:28:03,035 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:28:03,515 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:28:04,160 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:28:04,161 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 69 [2020-10-28 18:28:04,161 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-28 18:28:04,161 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1323 [2020-10-28 18:28:04,161 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:28:04,161 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:28:04,161 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-28 18:28:04,161 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 18:28:04,161 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 45 [2020-10-28 18:28:04,161 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:28:04,548 WARN L193 SmtUtils]: Spent 176.00 ms on a formula simplification that was a NOOP. DAG size: 136 [2020-10-28 18:28:04,549 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 18:28:04,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:28:04,555 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:28:04,561 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:28:04,561 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 18:28:04,561 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 18:28:04,561 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-28 18:28:04,561 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:28:04,561 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:28:04,562 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 18:28:04,562 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 18:28:04,562 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 18:28:04,562 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:28:04,573 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 18:28:04,573 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1560560573] [2020-10-28 18:28:04,573 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 18:28:04,573 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-10-28 18:28:04,574 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1545628468] [2020-10-28 18:28:04,574 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-28 18:28:04,574 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 18:28:04,574 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-28 18:28:04,574 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2020-10-28 18:28:04,575 INFO L87 Difference]: Start difference. First operand 1631 states and 2355 transitions. Second operand 10 states. [2020-10-28 18:28:04,833 WARN L193 SmtUtils]: Spent 213.00 ms on a formula simplification that was a NOOP. DAG size: 143 [2020-10-28 18:28:05,689 WARN L193 SmtUtils]: Spent 202.00 ms on a formula simplification that was a NOOP. DAG size: 145 [2020-10-28 18:28:06,493 WARN L193 SmtUtils]: Spent 187.00 ms on a formula simplification that was a NOOP. DAG size: 142 [2020-10-28 18:28:06,746 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 18:28:06,746 INFO L93 Difference]: Finished difference Result 2760 states and 4010 transitions. [2020-10-28 18:28:06,746 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-28 18:28:06,747 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 61 [2020-10-28 18:28:06,747 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 18:28:06,752 INFO L225 Difference]: With dead ends: 2760 [2020-10-28 18:28:06,753 INFO L226 Difference]: Without dead ends: 1989 [2020-10-28 18:28:06,755 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=88, Invalid=292, Unknown=0, NotChecked=0, Total=380 [2020-10-28 18:28:06,758 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1989 states. [2020-10-28 18:28:07,115 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1989 to 1609. [2020-10-28 18:28:07,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1609 states. [2020-10-28 18:28:07,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1609 states to 1609 states and 2326 transitions. [2020-10-28 18:28:07,120 INFO L78 Accepts]: Start accepts. Automaton has 1609 states and 2326 transitions. Word has length 61 [2020-10-28 18:28:07,120 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 18:28:07,120 INFO L481 AbstractCegarLoop]: Abstraction has 1609 states and 2326 transitions. [2020-10-28 18:28:07,120 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-28 18:28:07,120 INFO L276 IsEmpty]: Start isEmpty. Operand 1609 states and 2326 transitions. [2020-10-28 18:28:07,121 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-10-28 18:28:07,121 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 18:28:07,121 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 18:28:07,121 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-28 18:28:07,122 INFO L429 AbstractCegarLoop]: === Iteration 16 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 18:28:07,122 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 18:28:07,122 INFO L82 PathProgramCache]: Analyzing trace with hash -1252837005, now seen corresponding path program 1 times [2020-10-28 18:28:07,122 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 18:28:07,123 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1192795059] [2020-10-28 18:28:07,123 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 18:28:07,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:28:07,167 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:28:07,338 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:28:07,427 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:28:07,464 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:28:08,428 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:28:08,429 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 69 [2020-10-28 18:28:08,429 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-28 18:28:08,429 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1280 [2020-10-28 18:28:08,429 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:28:08,429 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:28:08,429 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-28 18:28:08,429 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 18:28:08,429 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 41 [2020-10-28 18:28:08,429 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:28:08,719 WARN L193 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 33 [2020-10-28 18:28:08,966 WARN L193 SmtUtils]: Spent 188.00 ms on a formula simplification that was a NOOP. DAG size: 136 [2020-10-28 18:28:08,967 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 18:28:08,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:28:08,974 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:28:08,979 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:28:08,979 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 18:28:08,979 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 18:28:08,979 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-28 18:28:08,980 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:28:08,980 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:28:08,980 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 18:28:08,980 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 18:28:08,980 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 18:28:08,980 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:28:08,997 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 18:28:08,997 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1192795059] [2020-10-28 18:28:08,997 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 18:28:08,998 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-10-28 18:28:08,998 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [395047730] [2020-10-28 18:28:08,998 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-28 18:28:08,998 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 18:28:08,999 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-28 18:28:08,999 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2020-10-28 18:28:08,999 INFO L87 Difference]: Start difference. First operand 1609 states and 2326 transitions. Second operand 9 states. [2020-10-28 18:28:09,268 WARN L193 SmtUtils]: Spent 216.00 ms on a formula simplification that was a NOOP. DAG size: 148 [2020-10-28 18:28:09,546 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 43 [2020-10-28 18:28:09,693 WARN L193 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 50 [2020-10-28 18:28:09,865 WARN L193 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 50 [2020-10-28 18:28:10,065 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 46 [2020-10-28 18:28:11,017 WARN L193 SmtUtils]: Spent 197.00 ms on a formula simplification that was a NOOP. DAG size: 147 [2020-10-28 18:28:11,272 WARN L193 SmtUtils]: Spent 216.00 ms on a formula simplification that was a NOOP. DAG size: 150 [2020-10-28 18:28:11,738 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 18:28:11,739 INFO L93 Difference]: Finished difference Result 3875 states and 5650 transitions. [2020-10-28 18:28:11,739 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-28 18:28:11,739 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 61 [2020-10-28 18:28:11,739 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 18:28:11,744 INFO L225 Difference]: With dead ends: 3875 [2020-10-28 18:28:11,744 INFO L226 Difference]: Without dead ends: 3099 [2020-10-28 18:28:11,746 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=71, Invalid=201, Unknown=0, NotChecked=0, Total=272 [2020-10-28 18:28:11,748 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3099 states. [2020-10-28 18:28:12,115 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3099 to 1580. [2020-10-28 18:28:12,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1580 states. [2020-10-28 18:28:12,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1580 states to 1580 states and 2291 transitions. [2020-10-28 18:28:12,118 INFO L78 Accepts]: Start accepts. Automaton has 1580 states and 2291 transitions. Word has length 61 [2020-10-28 18:28:12,118 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 18:28:12,118 INFO L481 AbstractCegarLoop]: Abstraction has 1580 states and 2291 transitions. [2020-10-28 18:28:12,119 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-28 18:28:12,119 INFO L276 IsEmpty]: Start isEmpty. Operand 1580 states and 2291 transitions. [2020-10-28 18:28:12,120 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2020-10-28 18:28:12,120 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 18:28:12,121 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 18:28:12,121 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-28 18:28:12,121 INFO L429 AbstractCegarLoop]: === Iteration 17 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 18:28:12,121 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 18:28:12,121 INFO L82 PathProgramCache]: Analyzing trace with hash 1922741987, now seen corresponding path program 1 times [2020-10-28 18:28:12,122 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 18:28:12,122 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1098367408] [2020-10-28 18:28:12,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 18:28:12,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:28:12,154 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:28:12,180 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:28:12,209 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:28:12,232 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:28:12,312 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:28:14,445 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:28:14,518 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:28:17,143 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:28:17,143 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 89 [2020-10-28 18:28:17,143 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-28 18:28:17,143 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-28 18:28:17,143 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:28:17,143 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:28:17,143 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 18:28:17,144 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 59 [2020-10-28 18:28:17,144 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-10-28 18:28:17,144 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:28:17,384 WARN L193 SmtUtils]: Spent 187.00 ms on a formula simplification that was a NOOP. DAG size: 136 [2020-10-28 18:28:17,385 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 18:28:17,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:28:17,392 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:28:17,398 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:28:17,398 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 18:28:17,399 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 18:28:17,399 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-28 18:28:17,399 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:28:17,399 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:28:17,399 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 18:28:17,399 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 18:28:17,399 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 18:28:17,400 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:28:17,416 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 18:28:17,417 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1098367408] [2020-10-28 18:28:17,417 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 18:28:17,417 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 18:28:17,417 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1589209675] [2020-10-28 18:28:17,418 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 18:28:17,418 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 18:28:17,418 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 18:28:17,418 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 18:28:17,419 INFO L87 Difference]: Start difference. First operand 1580 states and 2291 transitions. Second operand 4 states. [2020-10-28 18:28:17,656 WARN L193 SmtUtils]: Spent 206.00 ms on a formula simplification that was a NOOP. DAG size: 144 [2020-10-28 18:28:18,682 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 18:28:18,682 INFO L93 Difference]: Finished difference Result 4434 states and 6439 transitions. [2020-10-28 18:28:18,682 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 18:28:18,683 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 81 [2020-10-28 18:28:18,683 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 18:28:18,689 INFO L225 Difference]: With dead ends: 4434 [2020-10-28 18:28:18,689 INFO L226 Difference]: Without dead ends: 2927 [2020-10-28 18:28:18,693 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-28 18:28:18,696 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2927 states. [2020-10-28 18:28:19,726 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2927 to 2804. [2020-10-28 18:28:19,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2804 states. [2020-10-28 18:28:19,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2804 states to 2804 states and 4063 transitions. [2020-10-28 18:28:19,733 INFO L78 Accepts]: Start accepts. Automaton has 2804 states and 4063 transitions. Word has length 81 [2020-10-28 18:28:19,733 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 18:28:19,733 INFO L481 AbstractCegarLoop]: Abstraction has 2804 states and 4063 transitions. [2020-10-28 18:28:19,733 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 18:28:19,734 INFO L276 IsEmpty]: Start isEmpty. Operand 2804 states and 4063 transitions. [2020-10-28 18:28:19,736 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2020-10-28 18:28:19,736 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 18:28:19,736 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 18:28:19,736 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-28 18:28:19,737 INFO L429 AbstractCegarLoop]: === Iteration 18 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 18:28:19,737 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 18:28:19,737 INFO L82 PathProgramCache]: Analyzing trace with hash -810078676, now seen corresponding path program 1 times [2020-10-28 18:28:19,737 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 18:28:19,738 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [923406056] [2020-10-28 18:28:19,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 18:28:19,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:28:19,782 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:28:19,815 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:28:19,840 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:28:19,862 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:28:19,972 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:28:22,506 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:28:24,767 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:28:24,767 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 90 [2020-10-28 18:28:24,767 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-28 18:28:24,768 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-28 18:28:24,768 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:28:24,768 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:28:24,768 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 18:28:24,768 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 51 [2020-10-28 18:28:24,768 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-10-28 18:28:24,768 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:28:25,006 WARN L193 SmtUtils]: Spent 182.00 ms on a formula simplification that was a NOOP. DAG size: 136 [2020-10-28 18:28:25,008 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 18:28:25,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:28:25,015 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:28:25,020 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:28:25,021 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 18:28:25,021 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 18:28:25,021 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-28 18:28:25,021 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:28:25,021 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:28:25,021 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 18:28:25,022 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 18:28:25,022 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 18:28:25,022 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:28:25,037 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 18:28:25,037 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [923406056] [2020-10-28 18:28:25,037 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 18:28:25,037 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 18:28:25,037 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [393052084] [2020-10-28 18:28:25,038 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 18:28:25,038 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 18:28:25,038 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 18:28:25,039 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 18:28:25,039 INFO L87 Difference]: Start difference. First operand 2804 states and 4063 transitions. Second operand 4 states. [2020-10-28 18:28:25,277 WARN L193 SmtUtils]: Spent 209.00 ms on a formula simplification that was a NOOP. DAG size: 144 [2020-10-28 18:28:27,043 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 18:28:27,043 INFO L93 Difference]: Finished difference Result 7946 states and 11475 transitions. [2020-10-28 18:28:27,043 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 18:28:27,044 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 82 [2020-10-28 18:28:27,044 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 18:28:27,054 INFO L225 Difference]: With dead ends: 7946 [2020-10-28 18:28:27,054 INFO L226 Difference]: Without dead ends: 5215 [2020-10-28 18:28:27,059 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-28 18:28:27,064 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5215 states. [2020-10-28 18:28:28,216 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5215 to 4932. [2020-10-28 18:28:28,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4932 states. [2020-10-28 18:28:28,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4932 states to 4932 states and 7047 transitions. [2020-10-28 18:28:28,223 INFO L78 Accepts]: Start accepts. Automaton has 4932 states and 7047 transitions. Word has length 82 [2020-10-28 18:28:28,223 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 18:28:28,223 INFO L481 AbstractCegarLoop]: Abstraction has 4932 states and 7047 transitions. [2020-10-28 18:28:28,223 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 18:28:28,223 INFO L276 IsEmpty]: Start isEmpty. Operand 4932 states and 7047 transitions. [2020-10-28 18:28:28,224 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2020-10-28 18:28:28,224 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 18:28:28,225 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 18:28:28,225 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-28 18:28:28,225 INFO L429 AbstractCegarLoop]: === Iteration 19 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 18:28:28,225 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 18:28:28,225 INFO L82 PathProgramCache]: Analyzing trace with hash 1377924518, now seen corresponding path program 1 times [2020-10-28 18:28:28,226 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 18:28:28,226 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1846221823] [2020-10-28 18:28:28,226 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 18:28:28,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:28:28,252 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:28:28,276 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:28:28,347 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:28:28,370 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:28:28,411 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:28:28,496 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:28:28,906 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:28:29,176 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:28:29,266 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:28:30,063 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:28:30,742 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:28:33,244 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:28:33,245 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 91 [2020-10-28 18:28:33,245 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 11 [2020-10-28 18:28:33,245 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-28 18:28:33,245 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:28:33,245 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:28:33,245 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-28 18:28:33,245 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 49 [2020-10-28 18:28:33,245 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-28 18:28:33,245 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:28:33,448 WARN L193 SmtUtils]: Spent 172.00 ms on a formula simplification that was a NOOP. DAG size: 136 [2020-10-28 18:28:33,448 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 18:28:33,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:28:33,454 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:28:33,458 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:28:33,458 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 18:28:33,458 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 18:28:33,458 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-28 18:28:33,458 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:28:33,458 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:28:33,459 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 18:28:33,459 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 18:28:33,459 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 18:28:33,459 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:28:33,470 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 18:28:33,470 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1846221823] [2020-10-28 18:28:33,471 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 18:28:33,471 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-28 18:28:33,471 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1022705520] [2020-10-28 18:28:33,471 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-28 18:28:33,471 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 18:28:33,472 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-28 18:28:33,472 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-28 18:28:33,472 INFO L87 Difference]: Start difference. First operand 4932 states and 7047 transitions. Second operand 5 states. [2020-10-28 18:28:33,691 WARN L193 SmtUtils]: Spent 188.00 ms on a formula simplification that was a NOOP. DAG size: 138 [2020-10-28 18:28:35,269 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 18:28:35,270 INFO L93 Difference]: Finished difference Result 9802 states and 14029 transitions. [2020-10-28 18:28:35,270 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-28 18:28:35,270 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 83 [2020-10-28 18:28:35,270 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 18:28:35,281 INFO L225 Difference]: With dead ends: 9802 [2020-10-28 18:28:35,281 INFO L226 Difference]: Without dead ends: 4943 [2020-10-28 18:28:35,290 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-28 18:28:35,296 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4943 states. [2020-10-28 18:28:36,599 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4943 to 4932. [2020-10-28 18:28:36,600 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4932 states. [2020-10-28 18:28:36,606 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4932 states to 4932 states and 7047 transitions. [2020-10-28 18:28:36,607 INFO L78 Accepts]: Start accepts. Automaton has 4932 states and 7047 transitions. Word has length 83 [2020-10-28 18:28:36,607 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 18:28:36,607 INFO L481 AbstractCegarLoop]: Abstraction has 4932 states and 7047 transitions. [2020-10-28 18:28:36,607 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-28 18:28:36,607 INFO L276 IsEmpty]: Start isEmpty. Operand 4932 states and 7047 transitions. [2020-10-28 18:28:36,608 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2020-10-28 18:28:36,608 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 18:28:36,608 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 18:28:36,608 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-28 18:28:36,608 INFO L429 AbstractCegarLoop]: === Iteration 20 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 18:28:36,609 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 18:28:36,609 INFO L82 PathProgramCache]: Analyzing trace with hash 1506009825, now seen corresponding path program 1 times [2020-10-28 18:28:36,609 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 18:28:36,609 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1361343339] [2020-10-28 18:28:36,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 18:28:36,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:28:36,641 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:28:36,661 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:28:36,684 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:28:36,753 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:28:37,806 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:28:37,825 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:28:39,859 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:28:40,326 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:28:41,630 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:28:41,630 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 91 [2020-10-28 18:28:41,630 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-28 18:28:41,630 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4999 [2020-10-28 18:28:41,630 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:28:41,630 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:28:41,630 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-28 18:28:41,631 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-28 18:28:41,631 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 71 [2020-10-28 18:28:41,631 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:28:41,864 WARN L193 SmtUtils]: Spent 170.00 ms on a formula simplification that was a NOOP. DAG size: 136 [2020-10-28 18:28:41,865 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 18:28:41,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:28:41,870 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:28:41,875 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:28:41,875 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 18:28:41,875 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 18:28:41,875 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-28 18:28:41,875 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:28:41,875 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:28:41,875 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 18:28:41,875 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 18:28:41,876 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 18:28:41,876 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:28:41,893 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 18:28:41,893 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1361343339] [2020-10-28 18:28:41,893 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 18:28:41,893 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-28 18:28:41,893 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2037921154] [2020-10-28 18:28:41,893 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-28 18:28:41,894 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 18:28:41,894 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-28 18:28:41,894 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-28 18:28:41,894 INFO L87 Difference]: Start difference. First operand 4932 states and 7047 transitions. Second operand 5 states. [2020-10-28 18:28:42,120 WARN L193 SmtUtils]: Spent 199.00 ms on a formula simplification that was a NOOP. DAG size: 144 [2020-10-28 18:28:42,682 WARN L193 SmtUtils]: Spent 199.00 ms on a formula simplification that was a NOOP. DAG size: 138 [2020-10-28 18:28:44,228 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 18:28:44,228 INFO L93 Difference]: Finished difference Result 10736 states and 15341 transitions. [2020-10-28 18:28:44,229 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-28 18:28:44,229 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 83 [2020-10-28 18:28:44,229 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 18:28:44,242 INFO L225 Difference]: With dead ends: 10736 [2020-10-28 18:28:44,243 INFO L226 Difference]: Without dead ends: 5877 [2020-10-28 18:28:44,251 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2020-10-28 18:28:44,257 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5877 states. [2020-10-28 18:28:45,872 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5877 to 5874. [2020-10-28 18:28:45,872 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5874 states. [2020-10-28 18:28:45,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5874 states to 5874 states and 8325 transitions. [2020-10-28 18:28:45,880 INFO L78 Accepts]: Start accepts. Automaton has 5874 states and 8325 transitions. Word has length 83 [2020-10-28 18:28:45,880 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 18:28:45,880 INFO L481 AbstractCegarLoop]: Abstraction has 5874 states and 8325 transitions. [2020-10-28 18:28:45,880 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-28 18:28:45,880 INFO L276 IsEmpty]: Start isEmpty. Operand 5874 states and 8325 transitions. [2020-10-28 18:28:45,881 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2020-10-28 18:28:45,881 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 18:28:45,881 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 18:28:45,881 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-10-28 18:28:45,881 INFO L429 AbstractCegarLoop]: === Iteration 21 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 18:28:45,882 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 18:28:45,882 INFO L82 PathProgramCache]: Analyzing trace with hash -1137508483, now seen corresponding path program 1 times [2020-10-28 18:28:45,882 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 18:28:45,882 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [353667484] [2020-10-28 18:28:45,882 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 18:28:45,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:28:45,914 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:28:45,940 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:28:46,014 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:28:47,449 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:28:50,384 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:28:50,385 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 92 [2020-10-28 18:28:50,385 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-28 18:28:50,385 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4483 [2020-10-28 18:28:50,385 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:28:50,385 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:28:50,385 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 18:28:50,385 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 55 [2020-10-28 18:28:50,386 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-28 18:28:50,386 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:28:50,627 WARN L193 SmtUtils]: Spent 189.00 ms on a formula simplification that was a NOOP. DAG size: 136 [2020-10-28 18:28:50,628 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 18:28:50,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:28:50,634 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:28:50,639 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:28:50,640 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 18:28:50,640 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 18:28:50,640 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-28 18:28:50,640 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:28:50,640 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:28:50,640 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 18:28:50,640 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 18:28:50,641 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 18:28:50,641 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:28:50,658 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 18:28:50,658 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [353667484] [2020-10-28 18:28:50,658 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 18:28:50,659 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 18:28:50,659 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1726752440] [2020-10-28 18:28:50,659 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 18:28:50,659 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 18:28:50,660 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 18:28:50,660 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 18:28:50,660 INFO L87 Difference]: Start difference. First operand 5874 states and 8325 transitions. Second operand 4 states. [2020-10-28 18:28:50,903 WARN L193 SmtUtils]: Spent 209.00 ms on a formula simplification that was a NOOP. DAG size: 144 [2020-10-28 18:28:54,018 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 18:28:54,018 INFO L93 Difference]: Finished difference Result 16696 states and 23465 transitions. [2020-10-28 18:28:54,019 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 18:28:54,019 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 84 [2020-10-28 18:28:54,019 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 18:28:54,035 INFO L225 Difference]: With dead ends: 16696 [2020-10-28 18:28:54,036 INFO L226 Difference]: Without dead ends: 10901 [2020-10-28 18:28:54,046 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-28 18:28:54,056 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10901 states. [2020-10-28 18:28:56,724 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10901 to 10226. [2020-10-28 18:28:56,724 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10226 states. [2020-10-28 18:28:56,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10226 states to 10226 states and 14165 transitions. [2020-10-28 18:28:56,739 INFO L78 Accepts]: Start accepts. Automaton has 10226 states and 14165 transitions. Word has length 84 [2020-10-28 18:28:56,740 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 18:28:56,740 INFO L481 AbstractCegarLoop]: Abstraction has 10226 states and 14165 transitions. [2020-10-28 18:28:56,740 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 18:28:56,740 INFO L276 IsEmpty]: Start isEmpty. Operand 10226 states and 14165 transitions. [2020-10-28 18:28:56,741 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2020-10-28 18:28:56,741 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 18:28:56,741 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] [2020-10-28 18:28:56,741 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-10-28 18:28:56,741 INFO L429 AbstractCegarLoop]: === Iteration 22 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 18:28:56,741 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 18:28:56,741 INFO L82 PathProgramCache]: Analyzing trace with hash 82838779, now seen corresponding path program 1 times [2020-10-28 18:28:56,742 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 18:28:56,742 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [87770164] [2020-10-28 18:28:56,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 18:28:56,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:28:56,777 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:28:56,806 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:28:56,897 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:29:00,391 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:29:00,392 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 93 [2020-10-28 18:29:00,392 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 18:29:00,392 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3628 [2020-10-28 18:29:00,392 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:29:00,392 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:29:00,392 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 18:29:00,392 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 85 [2020-10-28 18:29:00,392 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 4 [2020-10-28 18:29:00,392 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:29:00,650 WARN L193 SmtUtils]: Spent 190.00 ms on a formula simplification that was a NOOP. DAG size: 136 [2020-10-28 18:29:00,651 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 18:29:00,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:29:00,656 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:29:00,660 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:29:00,661 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 18:29:00,661 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 18:29:00,661 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-28 18:29:00,661 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:29:00,661 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:29:00,661 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 18:29:00,661 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 18:29:00,661 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 18:29:00,661 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:29:00,670 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 18:29:00,670 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [87770164] [2020-10-28 18:29:00,671 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 18:29:00,671 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-28 18:29:00,671 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [60278352] [2020-10-28 18:29:00,671 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-28 18:29:00,671 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 18:29:00,672 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-28 18:29:00,672 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-28 18:29:00,672 INFO L87 Difference]: Start difference. First operand 10226 states and 14165 transitions. Second operand 6 states. [2020-10-28 18:29:06,403 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 18:29:06,403 INFO L93 Difference]: Finished difference Result 19790 states and 27020 transitions. [2020-10-28 18:29:06,404 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-28 18:29:06,404 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 85 [2020-10-28 18:29:06,405 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 18:29:06,429 INFO L225 Difference]: With dead ends: 19790 [2020-10-28 18:29:06,430 INFO L226 Difference]: Without dead ends: 19787 [2020-10-28 18:29:06,434 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2020-10-28 18:29:06,447 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19787 states. [2020-10-28 18:29:09,514 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19787 to 11090. [2020-10-28 18:29:09,515 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11090 states. [2020-10-28 18:29:09,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11090 states to 11090 states and 14997 transitions. [2020-10-28 18:29:09,531 INFO L78 Accepts]: Start accepts. Automaton has 11090 states and 14997 transitions. Word has length 85 [2020-10-28 18:29:09,531 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 18:29:09,532 INFO L481 AbstractCegarLoop]: Abstraction has 11090 states and 14997 transitions. [2020-10-28 18:29:09,532 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-28 18:29:09,532 INFO L276 IsEmpty]: Start isEmpty. Operand 11090 states and 14997 transitions. [2020-10-28 18:29:09,534 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2020-10-28 18:29:09,534 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 18:29:09,535 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 18:29:09,535 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-10-28 18:29:09,535 INFO L429 AbstractCegarLoop]: === Iteration 23 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 18:29:09,535 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 18:29:09,536 INFO L82 PathProgramCache]: Analyzing trace with hash 1999862708, now seen corresponding path program 1 times [2020-10-28 18:29:09,536 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 18:29:09,536 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [702695727] [2020-10-28 18:29:09,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 18:29:09,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:29:09,583 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:29:09,644 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:29:09,837 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:29:10,118 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:29:10,262 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:29:10,381 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:29:10,554 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:29:14,604 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:29:14,604 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 114 [2020-10-28 18:29:14,604 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-28 18:29:14,605 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5038 [2020-10-28 18:29:14,605 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:29:14,605 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:29:14,605 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-28 18:29:14,605 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-28 18:29:14,605 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 92 [2020-10-28 18:29:14,605 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:29:15,043 WARN L193 SmtUtils]: Spent 188.00 ms on a formula simplification that was a NOOP. DAG size: 136 [2020-10-28 18:29:15,044 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 18:29:15,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:29:15,054 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:29:15,067 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:29:15,068 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 18:29:15,068 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 18:29:15,068 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 16 [2020-10-28 18:29:15,068 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:29:15,068 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:29:15,068 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 18:29:15,068 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 18:29:15,069 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-28 18:29:15,069 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:29:15,107 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 9 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 18:29:15,108 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [702695727] [2020-10-28 18:29:15,108 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 18:29:15,108 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-28 18:29:15,108 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1777241070] [2020-10-28 18:29:15,108 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-28 18:29:15,109 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 18:29:15,109 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-28 18:29:15,109 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2020-10-28 18:29:15,109 INFO L87 Difference]: Start difference. First operand 11090 states and 14997 transitions. Second operand 12 states. [2020-10-28 18:29:15,689 WARN L193 SmtUtils]: Spent 470.00 ms on a formula simplification. DAG size of input: 151 DAG size of output: 150 [2020-10-28 18:29:20,550 WARN L193 SmtUtils]: Spent 217.00 ms on a formula simplification that was a NOOP. DAG size: 144 [2020-10-28 18:29:20,978 WARN L193 SmtUtils]: Spent 207.00 ms on a formula simplification that was a NOOP. DAG size: 141 [2020-10-28 18:29:21,411 WARN L193 SmtUtils]: Spent 224.00 ms on a formula simplification that was a NOOP. DAG size: 146 [2020-10-28 18:29:31,978 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 18:29:31,978 INFO L93 Difference]: Finished difference Result 49495 states and 65942 transitions. [2020-10-28 18:29:31,979 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2020-10-28 18:29:31,979 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 106 [2020-10-28 18:29:31,979 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 18:29:32,024 INFO L225 Difference]: With dead ends: 49495 [2020-10-28 18:29:32,024 INFO L226 Difference]: Without dead ends: 38484 [2020-10-28 18:29:32,045 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 714 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=547, Invalid=2105, Unknown=0, NotChecked=0, Total=2652 [2020-10-28 18:29:32,077 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38484 states. [2020-10-28 18:29:38,508 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38484 to 20623. [2020-10-28 18:29:38,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20623 states. [2020-10-28 18:29:38,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20623 states to 20623 states and 27681 transitions. [2020-10-28 18:29:38,536 INFO L78 Accepts]: Start accepts. Automaton has 20623 states and 27681 transitions. Word has length 106 [2020-10-28 18:29:38,536 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 18:29:38,536 INFO L481 AbstractCegarLoop]: Abstraction has 20623 states and 27681 transitions. [2020-10-28 18:29:38,536 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-28 18:29:38,537 INFO L276 IsEmpty]: Start isEmpty. Operand 20623 states and 27681 transitions. [2020-10-28 18:29:38,543 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2020-10-28 18:29:38,543 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 18:29:38,543 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 18:29:38,544 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-10-28 18:29:38,544 INFO L429 AbstractCegarLoop]: === Iteration 24 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 18:29:38,544 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 18:29:38,544 INFO L82 PathProgramCache]: Analyzing trace with hash 899889478, now seen corresponding path program 1 times [2020-10-28 18:29:38,544 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 18:29:38,545 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1896617937] [2020-10-28 18:29:38,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 18:29:38,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:29:38,586 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:29:38,625 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:29:38,685 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:29:38,753 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:29:39,855 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:29:39,896 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:29:39,929 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:29:40,450 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:29:40,537 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:29:42,019 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:29:42,616 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:29:42,819 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:29:43,578 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:29:43,578 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 115 [2020-10-28 18:29:43,578 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 12 [2020-10-28 18:29:43,578 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5008 [2020-10-28 18:29:43,578 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:29:43,579 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:29:43,579 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 18:29:43,579 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 59 [2020-10-28 18:29:43,579 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 11 [2020-10-28 18:29:43,579 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:29:43,775 WARN L193 SmtUtils]: Spent 174.00 ms on a formula simplification that was a NOOP. DAG size: 136 [2020-10-28 18:29:43,776 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 18:29:43,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:29:43,781 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:29:43,786 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:29:43,786 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 18:29:43,786 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 18:29:43,786 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-28 18:29:43,786 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:29:43,786 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:29:43,786 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 18:29:43,786 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 18:29:43,787 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 18:29:43,787 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:29:43,797 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2020-10-28 18:29:43,798 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1896617937] [2020-10-28 18:29:43,798 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 18:29:43,798 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 18:29:43,798 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1069559528] [2020-10-28 18:29:43,798 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 18:29:43,798 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 18:29:43,799 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 18:29:43,799 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 18:29:43,799 INFO L87 Difference]: Start difference. First operand 20623 states and 27681 transitions. Second operand 4 states. [2020-10-28 18:29:45,449 WARN L193 SmtUtils]: Spent 195.00 ms on a formula simplification that was a NOOP. DAG size: 137 [2020-10-28 18:29:49,786 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 18:29:49,787 INFO L93 Difference]: Finished difference Result 38106 states and 51307 transitions. [2020-10-28 18:29:49,787 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 18:29:49,787 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 107 [2020-10-28 18:29:49,788 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 18:29:49,809 INFO L225 Difference]: With dead ends: 38106 [2020-10-28 18:29:49,810 INFO L226 Difference]: Without dead ends: 17595 [2020-10-28 18:29:49,833 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-28 18:29:49,849 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17595 states. [2020-10-28 18:29:55,209 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17595 to 17595. [2020-10-28 18:29:55,210 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17595 states. [2020-10-28 18:29:55,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17595 states to 17595 states and 23417 transitions. [2020-10-28 18:29:55,234 INFO L78 Accepts]: Start accepts. Automaton has 17595 states and 23417 transitions. Word has length 107 [2020-10-28 18:29:55,234 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 18:29:55,234 INFO L481 AbstractCegarLoop]: Abstraction has 17595 states and 23417 transitions. [2020-10-28 18:29:55,234 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 18:29:55,234 INFO L276 IsEmpty]: Start isEmpty. Operand 17595 states and 23417 transitions. [2020-10-28 18:29:55,240 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2020-10-28 18:29:55,240 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 18:29:55,241 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 18:29:55,241 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-10-28 18:29:55,241 INFO L429 AbstractCegarLoop]: === Iteration 25 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 18:29:55,241 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 18:29:55,241 INFO L82 PathProgramCache]: Analyzing trace with hash -1973996875, now seen corresponding path program 1 times [2020-10-28 18:29:55,241 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 18:29:55,242 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [358428571] [2020-10-28 18:29:55,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 18:29:55,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:29:55,290 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:29:55,358 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:29:55,451 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:29:55,542 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:29:56,343 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:29:56,712 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:29:58,189 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:29:58,275 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:29:58,448 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:29:58,781 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:29:59,244 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:29:59,317 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:29:59,405 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:30:00,282 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:30:00,283 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 115 [2020-10-28 18:30:00,283 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 13 [2020-10-28 18:30:00,283 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5011 [2020-10-28 18:30:00,283 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:30:00,283 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:30:00,283 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-28 18:30:00,283 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-28 18:30:00,283 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 100 [2020-10-28 18:30:00,283 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:30:00,763 WARN L193 SmtUtils]: Spent 191.00 ms on a formula simplification that was a NOOP. DAG size: 136 [2020-10-28 18:30:00,763 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 18:30:00,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:30:00,773 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:30:00,784 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:30:00,785 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 18:30:00,785 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 18:30:00,785 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 13 [2020-10-28 18:30:00,785 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:30:00,785 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:30:00,785 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 18:30:00,785 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 18:30:00,785 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-28 18:30:00,785 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:30:00,816 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 18:30:00,816 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [358428571] [2020-10-28 18:30:00,816 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 18:30:00,816 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-28 18:30:00,816 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1663332209] [2020-10-28 18:30:00,817 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-28 18:30:00,817 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 18:30:00,817 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-28 18:30:00,817 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2020-10-28 18:30:00,817 INFO L87 Difference]: Start difference. First operand 17595 states and 23417 transitions. Second operand 13 states. [2020-10-28 18:30:01,160 WARN L193 SmtUtils]: Spent 259.00 ms on a formula simplification that was a NOOP. DAG size: 148 [2020-10-28 18:30:04,674 WARN L193 SmtUtils]: Spent 231.00 ms on a formula simplification that was a NOOP. DAG size: 146 [2020-10-28 18:30:05,222 WARN L193 SmtUtils]: Spent 218.00 ms on a formula simplification that was a NOOP. DAG size: 144 [2020-10-28 18:30:05,489 WARN L193 SmtUtils]: Spent 225.00 ms on a formula simplification that was a NOOP. DAG size: 148