/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --rcfgbuilder.size.of.a.code.block SequenceOfStatements --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=DEEPEST --traceabstraction.additional.smt.options log-additional-information=true --traceabstraction.additional.smt.options unknown-allowed=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf language data_model -i ../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_lcr.7.ufo.BOUNDED-14.pals.c.v+cfa-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-27 23:59:45,816 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-27 23:59:45,819 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-27 23:59:45,854 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-27 23:59:45,854 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-27 23:59:45,856 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-27 23:59:45,858 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-27 23:59:45,860 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-27 23:59:45,862 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-27 23:59:45,863 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-27 23:59:45,865 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-27 23:59:45,866 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-27 23:59:45,866 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-27 23:59:45,868 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-27 23:59:45,869 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-27 23:59:45,870 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-27 23:59:45,872 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-27 23:59:45,873 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-27 23:59:45,875 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-27 23:59:45,878 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-27 23:59:45,904 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-27 23:59:45,908 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-27 23:59:45,910 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-27 23:59:45,922 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-27 23:59:45,930 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-27 23:59:45,930 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-27 23:59:45,931 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-27 23:59:45,935 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-27 23:59:45,936 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-27 23:59:45,937 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-27 23:59:45,939 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-27 23:59:45,940 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-27 23:59:45,942 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-27 23:59:45,943 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-27 23:59:45,944 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-27 23:59:45,944 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-27 23:59:45,945 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-27 23:59:45,945 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-27 23:59:45,945 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-27 23:59:45,946 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-27 23:59:45,947 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-27 23:59:45,948 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 [2020-10-27 23:59:45,974 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-27 23:59:45,974 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-27 23:59:45,976 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-27 23:59:45,976 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-27 23:59:45,976 INFO L138 SettingsManager]: * Use SBE=true [2020-10-27 23:59:45,976 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-27 23:59:45,977 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-27 23:59:45,977 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-27 23:59:45,977 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-27 23:59:45,977 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-27 23:59:45,977 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-27 23:59:45,978 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-27 23:59:45,978 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-27 23:59:45,978 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-27 23:59:45,978 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-27 23:59:45,978 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-27 23:59:45,979 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-27 23:59:45,979 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-27 23:59:45,979 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-27 23:59:45,979 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-27 23:59:45,979 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-27 23:59:45,980 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-27 23:59:45,980 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-27 23:59:45,980 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-27 23:59:45,980 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-27 23:59:45,981 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-27 23:59:45,981 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-27 23:59:45,981 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-27 23:59:45,981 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-27 23:59:45,981 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=DEEPEST;log-additional-information=true;unknown-allowed=true; [2020-10-27 23:59:46,315 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-27 23:59:46,340 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-27 23:59:46,343 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-27 23:59:46,344 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-27 23:59:46,345 INFO L275 PluginConnector]: CDTParser initialized [2020-10-27 23:59:46,346 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_lcr.7.ufo.BOUNDED-14.pals.c.v+cfa-reducer.c [2020-10-27 23:59:46,418 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/3ce69f92b/67c2b3185d174cfcbbb473f75e47969e/FLAG4d94b8fb2 [2020-10-27 23:59:47,057 INFO L306 CDTParser]: Found 1 translation units. [2020-10-27 23:59:47,058 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/seq-mthreaded-reduced/pals_lcr.7.ufo.BOUNDED-14.pals.c.v+cfa-reducer.c [2020-10-27 23:59:47,075 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/3ce69f92b/67c2b3185d174cfcbbb473f75e47969e/FLAG4d94b8fb2 [2020-10-27 23:59:47,285 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/3ce69f92b/67c2b3185d174cfcbbb473f75e47969e [2020-10-27 23:59:47,289 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-27 23:59:47,297 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-27 23:59:47,300 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-27 23:59:47,300 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-27 23:59:47,305 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-27 23:59:47,306 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 11:59:47" (1/1) ... [2020-10-27 23:59:47,319 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5e09e2d2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 11:59:47, skipping insertion in model container [2020-10-27 23:59:47,320 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 11:59:47" (1/1) ... [2020-10-27 23:59:47,328 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-27 23:59:47,413 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-27 23:59:47,748 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 23:59:47,787 INFO L203 MainTranslator]: Completed pre-run [2020-10-27 23:59:47,947 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 23:59:47,977 INFO L208 MainTranslator]: Completed translation [2020-10-27 23:59:47,977 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 11:59:47 WrapperNode [2020-10-27 23:59:47,978 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-27 23:59:47,979 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-27 23:59:47,980 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-27 23:59:47,980 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-27 23:59:47,996 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 11:59:47" (1/1) ... [2020-10-27 23:59:47,998 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 11:59:47" (1/1) ... [2020-10-27 23:59:48,031 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 11:59:47" (1/1) ... [2020-10-27 23:59:48,031 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 11:59:47" (1/1) ... [2020-10-27 23:59:48,069 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 11:59:47" (1/1) ... [2020-10-27 23:59:48,092 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 11:59:47" (1/1) ... [2020-10-27 23:59:48,098 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 11:59:47" (1/1) ... [2020-10-27 23:59:48,103 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-27 23:59:48,104 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-27 23:59:48,105 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-27 23:59:48,105 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-27 23:59:48,106 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 11:59:47" (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 [2020-10-27 23:59:48,181 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-27 23:59:48,181 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-27 23:59:48,181 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-27 23:59:48,181 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-10-27 23:59:48,182 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-27 23:59:48,182 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-27 23:59:48,182 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-27 23:59:48,182 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-27 23:59:48,182 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-27 23:59:48,183 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-10-27 23:59:48,183 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-10-27 23:59:48,183 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2020-10-27 23:59:48,183 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-10-27 23:59:48,183 INFO L130 BoogieDeclarations]: Found specification of procedure read [2020-10-27 23:59:48,183 INFO L130 BoogieDeclarations]: Found specification of procedure write [2020-10-27 23:59:48,184 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2020-10-27 23:59:48,184 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2020-10-27 23:59:48,184 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2020-10-27 23:59:48,184 INFO L130 BoogieDeclarations]: Found specification of procedure node4 [2020-10-27 23:59:48,184 INFO L130 BoogieDeclarations]: Found specification of procedure node5 [2020-10-27 23:59:48,184 INFO L130 BoogieDeclarations]: Found specification of procedure node6 [2020-10-27 23:59:48,185 INFO L130 BoogieDeclarations]: Found specification of procedure node7 [2020-10-27 23:59:48,185 INFO L130 BoogieDeclarations]: Found specification of procedure init [2020-10-27 23:59:48,185 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-10-27 23:59:48,185 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-27 23:59:48,185 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-27 23:59:48,185 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-27 23:59:48,185 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-27 23:59:48,186 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-27 23:59:48,186 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-27 23:59:48,186 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-27 23:59:49,318 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-27 23:59:49,319 INFO L298 CfgBuilder]: Removed 0 assume(true) statements. [2020-10-27 23:59:49,321 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 11:59:49 BoogieIcfgContainer [2020-10-27 23:59:49,321 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-27 23:59:49,323 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-27 23:59:49,323 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-27 23:59:49,327 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-27 23:59:49,327 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.10 11:59:47" (1/3) ... [2020-10-27 23:59:49,328 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2ba66bbb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 11:59:49, skipping insertion in model container [2020-10-27 23:59:49,328 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 11:59:47" (2/3) ... [2020-10-27 23:59:49,328 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2ba66bbb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 11:59:49, skipping insertion in model container [2020-10-27 23:59:49,329 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 11:59:49" (3/3) ... [2020-10-27 23:59:49,330 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_lcr.7.ufo.BOUNDED-14.pals.c.v+cfa-reducer.c [2020-10-27 23:59:49,342 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-27 23:59:49,347 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-27 23:59:49,360 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-27 23:59:49,388 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-27 23:59:49,389 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-27 23:59:49,389 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-27 23:59:49,389 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-27 23:59:49,389 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-27 23:59:49,389 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-27 23:59:49,390 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-27 23:59:49,390 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-27 23:59:49,411 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states. [2020-10-27 23:59:49,422 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2020-10-27 23:59:49,422 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 23:59:49,423 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 23:59:49,424 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 23:59:49,430 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 23:59:49,430 INFO L82 PathProgramCache]: Analyzing trace with hash 247434898, now seen corresponding path program 1 times [2020-10-27 23:59:49,439 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 23:59:49,439 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1944707649] [2020-10-27 23:59:49,439 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 23:59:49,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:59:49,921 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:59:50,130 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:59:50,242 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:59:50,485 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:59:50,597 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:59:51,485 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:59:51,616 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:59:54,835 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:59:54,835 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 99 [2020-10-27 23:59:54,835 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-27 23:59:54,835 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5014 [2020-10-27 23:59:54,838 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:59:54,838 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 23:59:54,838 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 40 [2020-10-27 23:59:54,838 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 49 [2020-10-27 23:59:54,839 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-27 23:59:55,764 WARN L193 SmtUtils]: Spent 767.00 ms on a formula simplification that was a NOOP. DAG size: 202 [2020-10-27 23:59:55,767 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 23:59:55,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:59:55,789 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:59:55,811 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:59:55,812 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 23:59:55,812 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 23:59:55,812 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 29 [2020-10-27 23:59:55,812 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:59:55,813 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 23:59:55,813 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 23:59:55,813 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 23:59:55,813 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:59:55,862 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 23:59:55,863 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1944707649] [2020-10-27 23:59:55,865 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 23:59:55,865 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-27 23:59:55,866 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1265536778] [2020-10-27 23:59:55,872 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 23:59:55,873 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 23:59:55,893 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 23:59:55,894 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 23:59:55,897 INFO L87 Difference]: Start difference. First operand 145 states. Second operand 4 states. [2020-10-27 23:59:56,644 WARN L193 SmtUtils]: Spent 634.00 ms on a formula simplification that was a NOOP. DAG size: 206 [2020-10-27 23:59:57,627 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 23:59:57,628 INFO L93 Difference]: Finished difference Result 307 states and 499 transitions. [2020-10-27 23:59:57,632 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 23:59:57,633 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 91 [2020-10-27 23:59:57,635 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 23:59:57,659 INFO L225 Difference]: With dead ends: 307 [2020-10-27 23:59:57,659 INFO L226 Difference]: Without dead ends: 211 [2020-10-27 23:59:57,666 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-27 23:59:57,687 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 211 states. [2020-10-27 23:59:57,767 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 211 to 208. [2020-10-27 23:59:57,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 208 states. [2020-10-27 23:59:57,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 208 states to 208 states and 297 transitions. [2020-10-27 23:59:57,775 INFO L78 Accepts]: Start accepts. Automaton has 208 states and 297 transitions. Word has length 91 [2020-10-27 23:59:57,779 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 23:59:57,779 INFO L481 AbstractCegarLoop]: Abstraction has 208 states and 297 transitions. [2020-10-27 23:59:57,779 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-27 23:59:57,779 INFO L276 IsEmpty]: Start isEmpty. Operand 208 states and 297 transitions. [2020-10-27 23:59:57,783 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2020-10-27 23:59:57,783 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 23:59:57,784 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 23:59:57,784 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-27 23:59:57,784 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 23:59:57,785 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 23:59:57,785 INFO L82 PathProgramCache]: Analyzing trace with hash 888957062, now seen corresponding path program 1 times [2020-10-27 23:59:57,785 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 23:59:57,786 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [158160851] [2020-10-27 23:59:57,787 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 23:59:57,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:59:57,871 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:59:57,927 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:59:57,977 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:59:58,129 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:59:58,227 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:59:58,820 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:59:58,939 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:00:02,858 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:00:02,859 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 100 [2020-10-28 00:00:02,866 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-28 00:00:02,866 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5017 [2020-10-28 00:00:02,866 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:00:02,867 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 00:00:02,867 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 36 [2020-10-28 00:00:02,867 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 49 [2020-10-28 00:00:02,867 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:00:03,265 WARN L193 SmtUtils]: Spent 313.00 ms on a formula simplification that was a NOOP. DAG size: 202 [2020-10-28 00:00:03,269 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 00:00:03,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:00:03,285 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:00:03,296 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:00:03,297 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 00:00:03,297 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 00:00:03,297 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 14 [2020-10-28 00:00:03,297 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:00:03,297 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 00:00:03,298 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 00:00:03,298 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 00:00:03,298 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:00:03,338 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 00:00:03,339 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [158160851] [2020-10-28 00:00:03,339 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 00:00:03,340 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 00:00:03,342 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1309079374] [2020-10-28 00:00:03,343 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 00:00:03,343 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 00:00:03,346 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 00:00:03,346 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 00:00:03,346 INFO L87 Difference]: Start difference. First operand 208 states and 297 transitions. Second operand 4 states. [2020-10-28 00:00:03,795 WARN L193 SmtUtils]: Spent 388.00 ms on a formula simplification that was a NOOP. DAG size: 206 [2020-10-28 00:00:04,499 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 00:00:04,500 INFO L93 Difference]: Finished difference Result 494 states and 751 transitions. [2020-10-28 00:00:04,500 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 00:00:04,501 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 92 [2020-10-28 00:00:04,501 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 00:00:04,504 INFO L225 Difference]: With dead ends: 494 [2020-10-28 00:00:04,504 INFO L226 Difference]: Without dead ends: 343 [2020-10-28 00:00:04,506 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-28 00:00:04,507 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 343 states. [2020-10-28 00:00:04,539 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 343 to 340. [2020-10-28 00:00:04,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 340 states. [2020-10-28 00:00:04,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 340 states to 340 states and 507 transitions. [2020-10-28 00:00:04,543 INFO L78 Accepts]: Start accepts. Automaton has 340 states and 507 transitions. Word has length 92 [2020-10-28 00:00:04,543 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 00:00:04,543 INFO L481 AbstractCegarLoop]: Abstraction has 340 states and 507 transitions. [2020-10-28 00:00:04,543 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 00:00:04,543 INFO L276 IsEmpty]: Start isEmpty. Operand 340 states and 507 transitions. [2020-10-28 00:00:04,545 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2020-10-28 00:00:04,545 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 00:00:04,546 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 00:00:04,546 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-28 00:00:04,546 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 00:00:04,547 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 00:00:04,547 INFO L82 PathProgramCache]: Analyzing trace with hash 1751366750, now seen corresponding path program 1 times [2020-10-28 00:00:04,547 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 00:00:04,547 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [583069768] [2020-10-28 00:00:04,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 00:00:04,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:00:04,602 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:00:04,646 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:00:04,683 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:00:04,761 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:00:04,867 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:00:05,312 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:00:08,866 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:00:09,589 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:00:09,590 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 101 [2020-10-28 00:00:09,590 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-28 00:00:09,590 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5009 [2020-10-28 00:00:09,590 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:00:09,590 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 00:00:09,591 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 32 [2020-10-28 00:00:09,591 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 49 [2020-10-28 00:00:09,591 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:00:09,983 WARN L193 SmtUtils]: Spent 329.00 ms on a formula simplification that was a NOOP. DAG size: 202 [2020-10-28 00:00:09,984 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 00:00:09,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:00:09,996 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:00:10,006 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:00:10,006 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 00:00:10,006 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 00:00:10,006 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12 [2020-10-28 00:00:10,007 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:00:10,007 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 00:00:10,007 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 00:00:10,007 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 00:00:10,007 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:00:10,041 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 00:00:10,042 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [583069768] [2020-10-28 00:00:10,042 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 00:00:10,042 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 00:00:10,043 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [672680332] [2020-10-28 00:00:10,044 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 00:00:10,045 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 00:00:10,045 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 00:00:10,046 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 00:00:10,046 INFO L87 Difference]: Start difference. First operand 340 states and 507 transitions. Second operand 4 states. [2020-10-28 00:00:10,399 WARN L193 SmtUtils]: Spent 305.00 ms on a formula simplification that was a NOOP. DAG size: 206 [2020-10-28 00:00:11,112 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 00:00:11,112 INFO L93 Difference]: Finished difference Result 874 states and 1355 transitions. [2020-10-28 00:00:11,113 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 00:00:11,113 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 93 [2020-10-28 00:00:11,113 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 00:00:11,118 INFO L225 Difference]: With dead ends: 874 [2020-10-28 00:00:11,118 INFO L226 Difference]: Without dead ends: 591 [2020-10-28 00:00:11,120 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-28 00:00:11,122 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 591 states. [2020-10-28 00:00:11,169 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 591 to 588. [2020-10-28 00:00:11,170 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 588 states. [2020-10-28 00:00:11,173 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 588 states to 588 states and 899 transitions. [2020-10-28 00:00:11,173 INFO L78 Accepts]: Start accepts. Automaton has 588 states and 899 transitions. Word has length 93 [2020-10-28 00:00:11,174 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 00:00:11,174 INFO L481 AbstractCegarLoop]: Abstraction has 588 states and 899 transitions. [2020-10-28 00:00:11,174 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 00:00:11,174 INFO L276 IsEmpty]: Start isEmpty. Operand 588 states and 899 transitions. [2020-10-28 00:00:11,176 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2020-10-28 00:00:11,176 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 00:00:11,176 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 00:00:11,176 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-28 00:00:11,177 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 00:00:11,177 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 00:00:11,177 INFO L82 PathProgramCache]: Analyzing trace with hash 1432492344, now seen corresponding path program 1 times [2020-10-28 00:00:11,177 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 00:00:11,178 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1980765755] [2020-10-28 00:00:11,178 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 00:00:11,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:00:11,230 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:00:11,264 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:00:11,296 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:00:11,396 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:00:11,458 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:00:12,312 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:00:12,369 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:00:16,228 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:00:16,228 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 102 [2020-10-28 00:00:16,228 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-28 00:00:16,228 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5017 [2020-10-28 00:00:16,228 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:00:16,228 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-28 00:00:16,229 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 31 [2020-10-28 00:00:16,229 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 61 [2020-10-28 00:00:16,229 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:00:16,757 WARN L193 SmtUtils]: Spent 399.00 ms on a formula simplification that was a NOOP. DAG size: 202 [2020-10-28 00:00:16,758 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 00:00:16,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:00:16,768 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:00:16,779 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:00:16,779 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 00:00:16,779 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 00:00:16,779 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 13 [2020-10-28 00:00:16,779 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:00:16,780 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 00:00:16,780 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 00:00:16,780 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 00:00:16,780 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:00:16,809 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 00:00:16,810 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1980765755] [2020-10-28 00:00:16,810 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 00:00:16,810 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-28 00:00:16,811 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1730383404] [2020-10-28 00:00:16,811 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-28 00:00:16,811 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 00:00:16,812 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-28 00:00:16,812 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-10-28 00:00:16,812 INFO L87 Difference]: Start difference. First operand 588 states and 899 transitions. Second operand 7 states. [2020-10-28 00:00:17,198 WARN L193 SmtUtils]: Spent 316.00 ms on a formula simplification that was a NOOP. DAG size: 206 [2020-10-28 00:00:18,075 WARN L193 SmtUtils]: Spent 339.00 ms on a formula simplification that was a NOOP. DAG size: 208 [2020-10-28 00:00:18,506 WARN L193 SmtUtils]: Spent 388.00 ms on a formula simplification that was a NOOP. DAG size: 206 [2020-10-28 00:00:19,308 WARN L193 SmtUtils]: Spent 341.00 ms on a formula simplification that was a NOOP. DAG size: 203 [2020-10-28 00:00:19,653 WARN L193 SmtUtils]: Spent 325.00 ms on a formula simplification that was a NOOP. DAG size: 204 [2020-10-28 00:00:20,258 WARN L193 SmtUtils]: Spent 338.00 ms on a formula simplification that was a NOOP. DAG size: 205 [2020-10-28 00:00:20,624 WARN L193 SmtUtils]: Spent 338.00 ms on a formula simplification that was a NOOP. DAG size: 206 [2020-10-28 00:00:21,292 WARN L193 SmtUtils]: Spent 314.00 ms on a formula simplification that was a NOOP. DAG size: 207 [2020-10-28 00:00:21,401 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 00:00:21,401 INFO L93 Difference]: Finished difference Result 4824 states and 7611 transitions. [2020-10-28 00:00:21,402 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-28 00:00:21,402 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 94 [2020-10-28 00:00:21,402 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 00:00:21,427 INFO L225 Difference]: With dead ends: 4824 [2020-10-28 00:00:21,427 INFO L226 Difference]: Without dead ends: 4293 [2020-10-28 00:00:21,430 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=124, Invalid=296, Unknown=0, NotChecked=0, Total=420 [2020-10-28 00:00:21,436 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4293 states. [2020-10-28 00:00:21,562 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4293 to 1636. [2020-10-28 00:00:21,562 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1636 states. [2020-10-28 00:00:21,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1636 states to 1636 states and 2559 transitions. [2020-10-28 00:00:21,571 INFO L78 Accepts]: Start accepts. Automaton has 1636 states and 2559 transitions. Word has length 94 [2020-10-28 00:00:21,572 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 00:00:21,572 INFO L481 AbstractCegarLoop]: Abstraction has 1636 states and 2559 transitions. [2020-10-28 00:00:21,572 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-28 00:00:21,572 INFO L276 IsEmpty]: Start isEmpty. Operand 1636 states and 2559 transitions. [2020-10-28 00:00:21,574 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2020-10-28 00:00:21,574 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 00:00:21,574 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 00:00:21,575 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-28 00:00:21,575 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 00:00:21,575 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 00:00:21,575 INFO L82 PathProgramCache]: Analyzing trace with hash -2027272461, now seen corresponding path program 1 times [2020-10-28 00:00:21,576 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 00:00:21,576 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2012082462] [2020-10-28 00:00:21,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 00:00:21,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:00:21,646 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:00:21,698 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:00:21,740 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:00:21,838 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:00:21,900 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:00:23,929 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:00:26,624 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:00:26,624 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 102 [2020-10-28 00:00:26,624 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-28 00:00:26,624 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-10-28 00:00:26,625 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:00:26,625 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 00:00:26,625 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 28 [2020-10-28 00:00:26,625 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 49 [2020-10-28 00:00:26,625 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:00:27,167 WARN L193 SmtUtils]: Spent 456.00 ms on a formula simplification that was a NOOP. DAG size: 202 [2020-10-28 00:00:27,169 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 00:00:27,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:00:27,182 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:00:27,197 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:00:27,197 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 00:00:27,197 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 00:00:27,197 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 18 [2020-10-28 00:00:27,198 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:00:27,198 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 00:00:27,198 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 00:00:27,198 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 00:00:27,199 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:00:27,256 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 00:00:27,257 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2012082462] [2020-10-28 00:00:27,257 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 00:00:27,257 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 00:00:27,257 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [155544322] [2020-10-28 00:00:27,259 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 00:00:27,259 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 00:00:27,260 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 00:00:27,260 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 00:00:27,260 INFO L87 Difference]: Start difference. First operand 1636 states and 2559 transitions. Second operand 4 states. [2020-10-28 00:00:27,692 WARN L193 SmtUtils]: Spent 363.00 ms on a formula simplification that was a NOOP. DAG size: 206 [2020-10-28 00:00:28,502 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 00:00:28,502 INFO L93 Difference]: Finished difference Result 4602 states and 7251 transitions. [2020-10-28 00:00:28,503 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 00:00:28,503 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 94 [2020-10-28 00:00:28,505 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 00:00:28,523 INFO L225 Difference]: With dead ends: 4602 [2020-10-28 00:00:28,523 INFO L226 Difference]: Without dead ends: 3023 [2020-10-28 00:00:28,528 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-28 00:00:28,531 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3023 states. [2020-10-28 00:00:28,706 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3023 to 3020. [2020-10-28 00:00:28,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3020 states. [2020-10-28 00:00:28,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3020 states to 3020 states and 4723 transitions. [2020-10-28 00:00:28,723 INFO L78 Accepts]: Start accepts. Automaton has 3020 states and 4723 transitions. Word has length 94 [2020-10-28 00:00:28,723 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 00:00:28,723 INFO L481 AbstractCegarLoop]: Abstraction has 3020 states and 4723 transitions. [2020-10-28 00:00:28,723 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 00:00:28,723 INFO L276 IsEmpty]: Start isEmpty. Operand 3020 states and 4723 transitions. [2020-10-28 00:00:28,726 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2020-10-28 00:00:28,726 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 00:00:28,726 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 00:00:28,727 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-28 00:00:28,727 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 00:00:28,727 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 00:00:28,727 INFO L82 PathProgramCache]: Analyzing trace with hash -2113823784, now seen corresponding path program 1 times [2020-10-28 00:00:28,728 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 00:00:28,729 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2050074194] [2020-10-28 00:00:28,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 00:00:28,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:00:28,778 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:00:28,810 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:00:28,840 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:00:28,907 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:00:29,001 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:00:29,257 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:00:33,742 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:00:33,770 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:00:33,771 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 103 [2020-10-28 00:00:33,771 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-28 00:00:33,771 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5010 [2020-10-28 00:00:33,771 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:00:33,771 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-28 00:00:33,771 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 27 [2020-10-28 00:00:33,771 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 56 [2020-10-28 00:00:33,771 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:00:34,153 WARN L193 SmtUtils]: Spent 301.00 ms on a formula simplification that was a NOOP. DAG size: 202 [2020-10-28 00:00:34,154 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 00:00:34,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:00:34,164 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:00:34,172 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:00:34,172 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 00:00:34,172 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 00:00:34,172 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-28 00:00:34,173 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:00:34,173 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 00:00:34,173 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 00:00:34,173 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 00:00:34,173 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:00:34,202 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 00:00:34,202 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2050074194] [2020-10-28 00:00:34,202 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 00:00:34,202 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-28 00:00:34,203 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1312020387] [2020-10-28 00:00:34,203 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-28 00:00:34,203 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 00:00:34,204 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-28 00:00:34,204 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-10-28 00:00:34,204 INFO L87 Difference]: Start difference. First operand 3020 states and 4723 transitions. Second operand 7 states. [2020-10-28 00:00:34,590 WARN L193 SmtUtils]: Spent 316.00 ms on a formula simplification that was a NOOP. DAG size: 206 [2020-10-28 00:00:35,464 WARN L193 SmtUtils]: Spent 359.00 ms on a formula simplification that was a NOOP. DAG size: 208 [2020-10-28 00:00:35,840 WARN L193 SmtUtils]: Spent 343.00 ms on a formula simplification that was a NOOP. DAG size: 206 [2020-10-28 00:00:36,612 WARN L193 SmtUtils]: Spent 310.00 ms on a formula simplification that was a NOOP. DAG size: 203 [2020-10-28 00:00:36,958 WARN L193 SmtUtils]: Spent 327.00 ms on a formula simplification that was a NOOP. DAG size: 204 [2020-10-28 00:00:37,921 WARN L193 SmtUtils]: Spent 383.00 ms on a formula simplification that was a NOOP. DAG size: 205 [2020-10-28 00:00:38,271 WARN L193 SmtUtils]: Spent 332.00 ms on a formula simplification that was a NOOP. DAG size: 206 [2020-10-28 00:00:39,037 WARN L193 SmtUtils]: Spent 314.00 ms on a formula simplification that was a NOOP. DAG size: 207 [2020-10-28 00:00:39,221 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 00:00:39,221 INFO L93 Difference]: Finished difference Result 20811 states and 32703 transitions. [2020-10-28 00:00:39,222 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-28 00:00:39,222 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 95 [2020-10-28 00:00:39,222 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 00:00:39,328 INFO L225 Difference]: With dead ends: 20811 [2020-10-28 00:00:39,329 INFO L226 Difference]: Without dead ends: 18832 [2020-10-28 00:00:39,340 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=124, Invalid=296, Unknown=0, NotChecked=0, Total=420 [2020-10-28 00:00:39,364 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18832 states. [2020-10-28 00:00:39,975 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18832 to 5995. [2020-10-28 00:00:39,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5995 states. [2020-10-28 00:00:39,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5995 states to 5995 states and 9375 transitions. [2020-10-28 00:00:39,994 INFO L78 Accepts]: Start accepts. Automaton has 5995 states and 9375 transitions. Word has length 95 [2020-10-28 00:00:39,994 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 00:00:39,995 INFO L481 AbstractCegarLoop]: Abstraction has 5995 states and 9375 transitions. [2020-10-28 00:00:39,995 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-28 00:00:39,995 INFO L276 IsEmpty]: Start isEmpty. Operand 5995 states and 9375 transitions. [2020-10-28 00:00:39,996 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2020-10-28 00:00:39,996 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 00:00:39,996 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 00:00:39,996 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-28 00:00:39,997 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 00:00:39,997 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 00:00:39,997 INFO L82 PathProgramCache]: Analyzing trace with hash -562303464, now seen corresponding path program 1 times [2020-10-28 00:00:39,998 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 00:00:39,998 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [660638303] [2020-10-28 00:00:39,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 00:00:40,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:00:40,040 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:00:40,071 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:00:40,099 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:00:40,163 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:00:40,440 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:00:40,521 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:00:42,862 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:00:45,033 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:00:45,034 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 103 [2020-10-28 00:00:45,034 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-28 00:00:45,034 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5010 [2020-10-28 00:00:45,034 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:00:45,034 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-28 00:00:45,034 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 27 [2020-10-28 00:00:45,035 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 66 [2020-10-28 00:00:45,035 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:00:45,428 WARN L193 SmtUtils]: Spent 318.00 ms on a formula simplification that was a NOOP. DAG size: 202 [2020-10-28 00:00:45,429 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 00:00:45,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:00:45,438 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:00:45,448 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:00:45,448 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 00:00:45,449 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 00:00:45,449 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12 [2020-10-28 00:00:45,449 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:00:45,449 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 00:00:45,449 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 00:00:45,449 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 00:00:45,449 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:00:45,476 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 00:00:45,476 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [660638303] [2020-10-28 00:00:45,477 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 00:00:45,477 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-28 00:00:45,477 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1222240497] [2020-10-28 00:00:45,477 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-28 00:00:45,478 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 00:00:45,478 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-28 00:00:45,478 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-10-28 00:00:45,479 INFO L87 Difference]: Start difference. First operand 5995 states and 9375 transitions. Second operand 7 states. [2020-10-28 00:00:45,908 WARN L193 SmtUtils]: Spent 342.00 ms on a formula simplification that was a NOOP. DAG size: 206 [2020-10-28 00:00:46,765 WARN L193 SmtUtils]: Spent 323.00 ms on a formula simplification that was a NOOP. DAG size: 208 [2020-10-28 00:00:47,137 WARN L193 SmtUtils]: Spent 345.00 ms on a formula simplification that was a NOOP. DAG size: 206 [2020-10-28 00:00:47,954 WARN L193 SmtUtils]: Spent 323.00 ms on a formula simplification that was a NOOP. DAG size: 203 [2020-10-28 00:00:48,296 WARN L193 SmtUtils]: Spent 323.00 ms on a formula simplification that was a NOOP. DAG size: 204 [2020-10-28 00:00:49,187 WARN L193 SmtUtils]: Spent 328.00 ms on a formula simplification that was a NOOP. DAG size: 205 [2020-10-28 00:00:49,538 WARN L193 SmtUtils]: Spent 331.00 ms on a formula simplification that was a NOOP. DAG size: 206 [2020-10-28 00:00:50,343 WARN L193 SmtUtils]: Spent 340.00 ms on a formula simplification that was a NOOP. DAG size: 207 [2020-10-28 00:00:50,517 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 00:00:50,518 INFO L93 Difference]: Finished difference Result 23678 states and 37044 transitions. [2020-10-28 00:00:50,518 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-28 00:00:50,518 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 95 [2020-10-28 00:00:50,518 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 00:00:50,563 INFO L225 Difference]: With dead ends: 23678 [2020-10-28 00:00:50,563 INFO L226 Difference]: Without dead ends: 19739 [2020-10-28 00:00:50,577 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=124, Invalid=296, Unknown=0, NotChecked=0, Total=420 [2020-10-28 00:00:50,599 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19739 states. [2020-10-28 00:00:51,213 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19739 to 7955. [2020-10-28 00:00:51,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7955 states. [2020-10-28 00:00:51,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7955 states to 7955 states and 12455 transitions. [2020-10-28 00:00:51,235 INFO L78 Accepts]: Start accepts. Automaton has 7955 states and 12455 transitions. Word has length 95 [2020-10-28 00:00:51,235 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 00:00:51,235 INFO L481 AbstractCegarLoop]: Abstraction has 7955 states and 12455 transitions. [2020-10-28 00:00:51,235 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-28 00:00:51,235 INFO L276 IsEmpty]: Start isEmpty. Operand 7955 states and 12455 transitions. [2020-10-28 00:00:51,236 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2020-10-28 00:00:51,236 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 00:00:51,237 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 00:00:51,237 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-28 00:00:51,237 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 00:00:51,237 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 00:00:51,237 INFO L82 PathProgramCache]: Analyzing trace with hash 272899027, now seen corresponding path program 1 times [2020-10-28 00:00:51,238 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 00:00:51,238 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1962318484] [2020-10-28 00:00:51,238 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 00:00:51,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:00:51,280 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:00:51,311 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:00:51,339 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:00:51,392 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:00:52,284 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:00:56,264 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:00:56,265 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 103 [2020-10-28 00:00:56,265 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-28 00:00:56,265 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-28 00:00:56,265 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:00:56,265 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 00:00:56,265 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 24 [2020-10-28 00:00:56,265 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 49 [2020-10-28 00:00:56,265 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:00:56,620 WARN L193 SmtUtils]: Spent 319.00 ms on a formula simplification that was a NOOP. DAG size: 202 [2020-10-28 00:00:56,621 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 00:00:56,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:00:56,630 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:00:56,638 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:00:56,638 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 00:00:56,639 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 00:00:56,639 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-28 00:00:56,639 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:00:56,639 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 00:00:56,639 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 00:00:56,639 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 00:00:56,639 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:00:56,667 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 00:00:56,667 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1962318484] [2020-10-28 00:00:56,668 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 00:00:56,668 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 00:00:56,668 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1117962954] [2020-10-28 00:00:56,668 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 00:00:56,669 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 00:00:56,669 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 00:00:56,669 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 00:00:56,669 INFO L87 Difference]: Start difference. First operand 7955 states and 12455 transitions. Second operand 4 states. [2020-10-28 00:00:57,044 WARN L193 SmtUtils]: Spent 324.00 ms on a formula simplification that was a NOOP. DAG size: 206 [2020-10-28 00:00:58,256 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 00:00:58,256 INFO L93 Difference]: Finished difference Result 22658 states and 35479 transitions. [2020-10-28 00:00:58,257 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 00:00:58,257 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 95 [2020-10-28 00:00:58,257 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 00:00:58,286 INFO L225 Difference]: With dead ends: 22658 [2020-10-28 00:00:58,286 INFO L226 Difference]: Without dead ends: 14786 [2020-10-28 00:00:58,306 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-28 00:00:58,324 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14786 states. [2020-10-28 00:00:59,623 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14786 to 14783. [2020-10-28 00:00:59,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14783 states. [2020-10-28 00:00:59,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14783 states to 14783 states and 22991 transitions. [2020-10-28 00:00:59,661 INFO L78 Accepts]: Start accepts. Automaton has 14783 states and 22991 transitions. Word has length 95 [2020-10-28 00:00:59,661 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 00:00:59,661 INFO L481 AbstractCegarLoop]: Abstraction has 14783 states and 22991 transitions. [2020-10-28 00:00:59,662 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 00:00:59,662 INFO L276 IsEmpty]: Start isEmpty. Operand 14783 states and 22991 transitions. [2020-10-28 00:00:59,663 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2020-10-28 00:00:59,663 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 00:00:59,663 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 00:00:59,663 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-28 00:00:59,663 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 00:00:59,663 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 00:00:59,664 INFO L82 PathProgramCache]: Analyzing trace with hash 1942556259, now seen corresponding path program 1 times [2020-10-28 00:00:59,664 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 00:00:59,664 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1850304951] [2020-10-28 00:00:59,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 00:00:59,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:00:59,709 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:00:59,742 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:00:59,773 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:00:59,883 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:00:59,960 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:01:01,762 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:01:04,703 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:01:04,704 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 104 [2020-10-28 00:01:04,704 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-28 00:01:04,704 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5012 [2020-10-28 00:01:04,704 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:01:04,704 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-28 00:01:04,704 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 23 [2020-10-28 00:01:04,704 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 56 [2020-10-28 00:01:04,704 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:01:05,085 WARN L193 SmtUtils]: Spent 319.00 ms on a formula simplification that was a NOOP. DAG size: 202 [2020-10-28 00:01:05,086 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 00:01:05,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:01:05,095 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:01:05,103 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:01:05,103 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 00:01:05,103 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 00:01:05,103 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-28 00:01:05,103 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:01:05,103 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 00:01:05,104 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 00:01:05,104 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 00:01:05,104 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:01:05,130 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 00:01:05,131 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1850304951] [2020-10-28 00:01:05,131 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 00:01:05,131 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-28 00:01:05,131 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [685952747] [2020-10-28 00:01:05,132 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-28 00:01:05,132 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 00:01:05,132 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-28 00:01:05,133 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-10-28 00:01:05,133 INFO L87 Difference]: Start difference. First operand 14783 states and 22991 transitions. Second operand 7 states. [2020-10-28 00:01:05,537 WARN L193 SmtUtils]: Spent 338.00 ms on a formula simplification that was a NOOP. DAG size: 206 [2020-10-28 00:01:06,387 WARN L193 SmtUtils]: Spent 348.00 ms on a formula simplification that was a NOOP. DAG size: 208 [2020-10-28 00:01:06,755 WARN L193 SmtUtils]: Spent 341.00 ms on a formula simplification that was a NOOP. DAG size: 206 [2020-10-28 00:01:07,847 WARN L193 SmtUtils]: Spent 364.00 ms on a formula simplification that was a NOOP. DAG size: 204 [2020-10-28 00:01:08,249 WARN L193 SmtUtils]: Spent 364.00 ms on a formula simplification that was a NOOP. DAG size: 203 [2020-10-28 00:01:10,507 WARN L193 SmtUtils]: Spent 332.00 ms on a formula simplification that was a NOOP. DAG size: 205 [2020-10-28 00:01:10,874 WARN L193 SmtUtils]: Spent 332.00 ms on a formula simplification that was a NOOP. DAG size: 206 [2020-10-28 00:01:12,625 WARN L193 SmtUtils]: Spent 346.00 ms on a formula simplification that was a NOOP. DAG size: 207 [2020-10-28 00:01:13,134 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 00:01:13,135 INFO L93 Difference]: Finished difference Result 88156 states and 137125 transitions. [2020-10-28 00:01:13,135 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-28 00:01:13,135 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 96 [2020-10-28 00:01:13,136 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 00:01:13,291 INFO L225 Difference]: With dead ends: 88156 [2020-10-28 00:01:13,291 INFO L226 Difference]: Without dead ends: 80793 [2020-10-28 00:01:13,321 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=124, Invalid=296, Unknown=0, NotChecked=0, Total=420 [2020-10-28 00:01:13,389 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80793 states. [2020-10-28 00:01:15,393 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80793 to 22052. [2020-10-28 00:01:15,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22052 states. [2020-10-28 00:01:15,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22052 states to 22052 states and 34164 transitions. [2020-10-28 00:01:15,448 INFO L78 Accepts]: Start accepts. Automaton has 22052 states and 34164 transitions. Word has length 96 [2020-10-28 00:01:15,449 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 00:01:15,449 INFO L481 AbstractCegarLoop]: Abstraction has 22052 states and 34164 transitions. [2020-10-28 00:01:15,449 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-28 00:01:15,449 INFO L276 IsEmpty]: Start isEmpty. Operand 22052 states and 34164 transitions. [2020-10-28 00:01:15,450 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2020-10-28 00:01:15,450 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 00:01:15,450 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 00:01:15,451 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-28 00:01:15,451 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 00:01:15,451 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 00:01:15,451 INFO L82 PathProgramCache]: Analyzing trace with hash 1414255437, now seen corresponding path program 1 times [2020-10-28 00:01:15,452 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 00:01:15,452 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2004045246] [2020-10-28 00:01:15,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 00:01:15,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:01:15,495 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:01:15,526 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:01:15,551 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:01:15,626 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:01:15,948 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:01:18,135 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:01:20,483 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:01:20,483 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 104 [2020-10-28 00:01:20,484 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-28 00:01:20,484 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-10-28 00:01:20,484 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:01:20,484 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-28 00:01:20,484 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 23 [2020-10-28 00:01:20,484 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 61 [2020-10-28 00:01:20,484 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:01:20,861 WARN L193 SmtUtils]: Spent 316.00 ms on a formula simplification that was a NOOP. DAG size: 202 [2020-10-28 00:01:20,862 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 00:01:20,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:01:20,870 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:01:20,878 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:01:20,878 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 00:01:20,878 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 00:01:20,878 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-28 00:01:20,878 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:01:20,878 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 00:01:20,879 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 00:01:20,879 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 00:01:20,879 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:01:20,899 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 00:01:20,900 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2004045246] [2020-10-28 00:01:20,900 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 00:01:20,900 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-28 00:01:20,900 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1962837935] [2020-10-28 00:01:20,901 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-28 00:01:20,901 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 00:01:20,901 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-28 00:01:20,901 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-10-28 00:01:20,902 INFO L87 Difference]: Start difference. First operand 22052 states and 34164 transitions. Second operand 7 states. [2020-10-28 00:01:21,301 WARN L193 SmtUtils]: Spent 338.00 ms on a formula simplification that was a NOOP. DAG size: 206 [2020-10-28 00:01:22,155 WARN L193 SmtUtils]: Spent 349.00 ms on a formula simplification that was a NOOP. DAG size: 208 [2020-10-28 00:01:22,523 WARN L193 SmtUtils]: Spent 339.00 ms on a formula simplification that was a NOOP. DAG size: 206 [2020-10-28 00:01:23,566 WARN L193 SmtUtils]: Spent 321.00 ms on a formula simplification that was a NOOP. DAG size: 204 [2020-10-28 00:01:23,928 WARN L193 SmtUtils]: Spent 328.00 ms on a formula simplification that was a NOOP. DAG size: 203 [2020-10-28 00:01:26,458 WARN L193 SmtUtils]: Spent 334.00 ms on a formula simplification that was a NOOP. DAG size: 205 [2020-10-28 00:01:26,817 WARN L193 SmtUtils]: Spent 332.00 ms on a formula simplification that was a NOOP. DAG size: 206 [2020-10-28 00:01:28,582 WARN L193 SmtUtils]: Spent 347.00 ms on a formula simplification that was a NOOP. DAG size: 207 [2020-10-28 00:01:29,373 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 00:01:29,373 INFO L93 Difference]: Finished difference Result 87343 states and 135209 transitions. [2020-10-28 00:01:29,374 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-28 00:01:29,374 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 96 [2020-10-28 00:01:29,374 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 00:01:29,481 INFO L225 Difference]: With dead ends: 87343 [2020-10-28 00:01:29,481 INFO L226 Difference]: Without dead ends: 72684 [2020-10-28 00:01:29,523 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=124, Invalid=296, Unknown=0, NotChecked=0, Total=420 [2020-10-28 00:01:29,589 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72684 states. [2020-10-28 00:01:32,135 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72684 to 29343. [2020-10-28 00:01:32,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29343 states. [2020-10-28 00:01:32,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29343 states to 29343 states and 45487 transitions. [2020-10-28 00:01:32,245 INFO L78 Accepts]: Start accepts. Automaton has 29343 states and 45487 transitions. Word has length 96 [2020-10-28 00:01:32,246 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 00:01:32,246 INFO L481 AbstractCegarLoop]: Abstraction has 29343 states and 45487 transitions. [2020-10-28 00:01:32,246 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-28 00:01:32,246 INFO L276 IsEmpty]: Start isEmpty. Operand 29343 states and 45487 transitions. [2020-10-28 00:01:32,247 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2020-10-28 00:01:32,247 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 00:01:32,247 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 00:01:32,247 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-28 00:01:32,247 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 00:01:32,248 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 00:01:32,248 INFO L82 PathProgramCache]: Analyzing trace with hash -1329191539, now seen corresponding path program 1 times [2020-10-28 00:01:32,248 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 00:01:32,248 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1990828487] [2020-10-28 00:01:32,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 00:01:32,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:01:32,290 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:01:32,321 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:01:32,350 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:01:32,516 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:01:32,796 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:01:33,806 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:01:37,273 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:01:37,273 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 104 [2020-10-28 00:01:37,273 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-28 00:01:37,274 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-28 00:01:37,274 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:01:37,274 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-28 00:01:37,274 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 23 [2020-10-28 00:01:37,274 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 71 [2020-10-28 00:01:37,274 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:01:37,694 WARN L193 SmtUtils]: Spent 353.00 ms on a formula simplification that was a NOOP. DAG size: 202 [2020-10-28 00:01:37,696 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 00:01:37,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:01:37,706 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:01:37,714 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:01:37,715 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 00:01:37,715 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 00:01:37,715 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-28 00:01:37,715 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:01:37,715 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 00:01:37,715 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 00:01:37,715 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 00:01:37,716 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:01:37,742 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 00:01:37,742 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1990828487] [2020-10-28 00:01:37,742 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 00:01:37,742 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-28 00:01:37,743 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [806695124] [2020-10-28 00:01:37,743 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-28 00:01:37,743 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 00:01:37,744 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-28 00:01:37,744 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-10-28 00:01:37,744 INFO L87 Difference]: Start difference. First operand 29343 states and 45487 transitions. Second operand 7 states. [2020-10-28 00:01:38,148 WARN L193 SmtUtils]: Spent 325.00 ms on a formula simplification that was a NOOP. DAG size: 206 [2020-10-28 00:01:39,085 WARN L193 SmtUtils]: Spent 412.00 ms on a formula simplification that was a NOOP. DAG size: 208 [2020-10-28 00:01:39,456 WARN L193 SmtUtils]: Spent 342.00 ms on a formula simplification that was a NOOP. DAG size: 206 [2020-10-28 00:01:40,586 WARN L193 SmtUtils]: Spent 325.00 ms on a formula simplification that was a NOOP. DAG size: 204 [2020-10-28 00:01:40,938 WARN L193 SmtUtils]: Spent 323.00 ms on a formula simplification that was a NOOP. DAG size: 203 [2020-10-28 00:01:44,275 WARN L193 SmtUtils]: Spent 371.00 ms on a formula simplification that was a NOOP. DAG size: 205 [2020-10-28 00:01:44,698 WARN L193 SmtUtils]: Spent 372.00 ms on a formula simplification that was a NOOP. DAG size: 206 [2020-10-28 00:01:47,052 WARN L193 SmtUtils]: Spent 339.00 ms on a formula simplification that was a NOOP. DAG size: 207 [2020-10-28 00:01:48,211 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 00:01:48,212 INFO L93 Difference]: Finished difference Result 99443 states and 153888 transitions. [2020-10-28 00:01:48,212 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-28 00:01:48,212 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 96 [2020-10-28 00:01:48,212 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 00:01:48,302 INFO L225 Difference]: With dead ends: 99443 [2020-10-28 00:01:48,302 INFO L226 Difference]: Without dead ends: 84784 [2020-10-28 00:01:48,342 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=124, Invalid=296, Unknown=0, NotChecked=0, Total=420 [2020-10-28 00:01:48,411 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84784 states. [2020-10-28 00:01:51,930 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84784 to 36639. [2020-10-28 00:01:51,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36639 states. [2020-10-28 00:01:51,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36639 states to 36639 states and 56815 transitions. [2020-10-28 00:01:51,985 INFO L78 Accepts]: Start accepts. Automaton has 36639 states and 56815 transitions. Word has length 96 [2020-10-28 00:01:51,985 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 00:01:51,985 INFO L481 AbstractCegarLoop]: Abstraction has 36639 states and 56815 transitions. [2020-10-28 00:01:51,985 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-28 00:01:51,985 INFO L276 IsEmpty]: Start isEmpty. Operand 36639 states and 56815 transitions. [2020-10-28 00:01:51,986 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2020-10-28 00:01:51,986 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 00:01:51,986 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 00:01:51,986 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-28 00:01:51,986 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 00:01:51,987 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 00:01:51,987 INFO L82 PathProgramCache]: Analyzing trace with hash -493989048, now seen corresponding path program 1 times [2020-10-28 00:01:51,987 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 00:01:51,987 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [490303257] [2020-10-28 00:01:51,987 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 00:01:52,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:01:52,030 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:01:52,059 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:01:52,081 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:01:52,471 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:01:54,633 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:01:54,634 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 104 [2020-10-28 00:01:54,634 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-28 00:01:54,634 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2619 [2020-10-28 00:01:54,634 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:01:54,634 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 00:01:54,634 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-28 00:01:54,634 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 49 [2020-10-28 00:01:54,634 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:01:55,089 WARN L193 SmtUtils]: Spent 421.00 ms on a formula simplification that was a NOOP. DAG size: 202 [2020-10-28 00:01:55,090 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 00:01:55,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:01:55,098 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:01:55,104 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:01:55,104 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 00:01:55,104 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 00:01:55,104 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-28 00:01:55,104 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:01:55,104 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 00:01:55,105 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 00:01:55,105 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 00:01:55,105 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:01:55,126 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 00:01:55,126 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [490303257] [2020-10-28 00:01:55,126 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 00:01:55,126 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 00:01:55,126 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [766449318] [2020-10-28 00:01:55,127 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 00:01:55,127 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 00:01:55,127 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 00:01:55,127 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 00:01:55,128 INFO L87 Difference]: Start difference. First operand 36639 states and 56815 transitions. Second operand 4 states. [2020-10-28 00:01:55,497 WARN L193 SmtUtils]: Spent 329.00 ms on a formula simplification that was a NOOP. DAG size: 206 [2020-10-28 00:02:01,133 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 00:02:01,133 INFO L93 Difference]: Finished difference Result 104628 states and 161927 transitions. [2020-10-28 00:02:01,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 00:02:01,133 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 96 [2020-10-28 00:02:01,134 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 00:02:01,213 INFO L225 Difference]: With dead ends: 104628 [2020-10-28 00:02:01,214 INFO L226 Difference]: Without dead ends: 68062 [2020-10-28 00:02:01,254 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-28 00:02:01,297 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68062 states. [2020-10-28 00:02:06,874 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68062 to 68059. [2020-10-28 00:02:06,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68059 states. [2020-10-28 00:02:06,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68059 states to 68059 states and 104551 transitions. [2020-10-28 00:02:06,984 INFO L78 Accepts]: Start accepts. Automaton has 68059 states and 104551 transitions. Word has length 96 [2020-10-28 00:02:06,985 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 00:02:06,985 INFO L481 AbstractCegarLoop]: Abstraction has 68059 states and 104551 transitions. [2020-10-28 00:02:06,985 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 00:02:06,985 INFO L276 IsEmpty]: Start isEmpty. Operand 68059 states and 104551 transitions. [2020-10-28 00:02:06,986 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2020-10-28 00:02:06,986 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 00:02:06,986 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 00:02:06,986 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-28 00:02:06,986 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 00:02:06,987 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 00:02:06,987 INFO L82 PathProgramCache]: Analyzing trace with hash 609096591, now seen corresponding path program 1 times [2020-10-28 00:02:06,987 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 00:02:06,987 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1926233390] [2020-10-28 00:02:06,987 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 00:02:07,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:02:07,273 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:02:07,301 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:02:07,338 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:02:07,433 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:02:08,793 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:02:12,024 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:02:12,025 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 105 [2020-10-28 00:02:12,025 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-28 00:02:12,025 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5010 [2020-10-28 00:02:12,025 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:02:12,025 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-28 00:02:12,025 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-10-28 00:02:12,025 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 56 [2020-10-28 00:02:12,025 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:02:12,403 WARN L193 SmtUtils]: Spent 315.00 ms on a formula simplification that was a NOOP. DAG size: 202 [2020-10-28 00:02:12,404 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 00:02:12,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:02:12,411 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:02:12,417 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:02:12,417 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 00:02:12,417 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 00:02:12,417 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-28 00:02:12,418 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:02:12,418 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 00:02:12,418 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 00:02:12,418 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 00:02:12,418 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:02:12,436 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 00:02:12,437 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1926233390] [2020-10-28 00:02:12,437 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 00:02:12,437 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-28 00:02:12,437 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1882588683] [2020-10-28 00:02:12,437 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-28 00:02:12,437 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 00:02:12,438 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-28 00:02:12,438 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-10-28 00:02:12,438 INFO L87 Difference]: Start difference. First operand 68059 states and 104551 transitions. Second operand 7 states. [2020-10-28 00:02:12,833 WARN L193 SmtUtils]: Spent 337.00 ms on a formula simplification that was a NOOP. DAG size: 206 [2020-10-28 00:02:13,678 WARN L193 SmtUtils]: Spent 346.00 ms on a formula simplification that was a NOOP. DAG size: 208 [2020-10-28 00:02:14,044 WARN L193 SmtUtils]: Spent 337.00 ms on a formula simplification that was a NOOP. DAG size: 206 [2020-10-28 00:02:16,272 WARN L193 SmtUtils]: Spent 323.00 ms on a formula simplification that was a NOOP. DAG size: 204 [2020-10-28 00:02:16,645 WARN L193 SmtUtils]: Spent 324.00 ms on a formula simplification that was a NOOP. DAG size: 203 [2020-10-28 00:02:30,988 WARN L193 SmtUtils]: Spent 338.00 ms on a formula simplification that was a NOOP. DAG size: 206 [2020-10-28 00:02:31,474 WARN L193 SmtUtils]: Spent 333.00 ms on a formula simplification that was a NOOP. DAG size: 205 [2020-10-28 00:02:41,534 WARN L193 SmtUtils]: Spent 346.00 ms on a formula simplification that was a NOOP. DAG size: 207 [2020-10-28 00:02:44,447 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 00:02:44,447 INFO L93 Difference]: Finished difference Result 366840 states and 563069 transitions. [2020-10-28 00:02:44,448 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-28 00:02:44,448 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 97 [2020-10-28 00:02:44,448 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 00:02:45,163 INFO L225 Difference]: With dead ends: 366840 [2020-10-28 00:02:45,163 INFO L226 Difference]: Without dead ends: 339573 [2020-10-28 00:02:45,251 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=124, Invalid=296, Unknown=0, NotChecked=0, Total=420 [2020-10-28 00:02:45,478 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 339573 states. [2020-10-28 00:02:56,076 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 339573 to 81376. [2020-10-28 00:02:56,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81376 states. [2020-10-28 00:02:56,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81376 states to 81376 states and 124396 transitions. [2020-10-28 00:02:56,211 INFO L78 Accepts]: Start accepts. Automaton has 81376 states and 124396 transitions. Word has length 97 [2020-10-28 00:02:56,211 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 00:02:56,211 INFO L481 AbstractCegarLoop]: Abstraction has 81376 states and 124396 transitions. [2020-10-28 00:02:56,211 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-28 00:02:56,211 INFO L276 IsEmpty]: Start isEmpty. Operand 81376 states and 124396 transitions. [2020-10-28 00:02:56,212 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2020-10-28 00:02:56,212 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 00:02:56,212 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 00:02:56,213 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-28 00:02:56,213 INFO L429 AbstractCegarLoop]: === Iteration 14 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 00:02:56,213 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 00:02:56,213 INFO L82 PathProgramCache]: Analyzing trace with hash 1244909797, now seen corresponding path program 1 times [2020-10-28 00:02:56,214 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 00:02:56,214 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [736400616] [2020-10-28 00:02:56,214 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 00:02:56,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:02:56,248 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:02:56,269 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:02:56,293 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:02:56,497 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:02:57,376 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:03:01,236 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:03:01,236 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 105 [2020-10-28 00:03:01,236 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-28 00:03:01,236 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4999 [2020-10-28 00:03:01,236 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:03:01,236 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-28 00:03:01,236 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-10-28 00:03:01,236 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 61 [2020-10-28 00:03:01,236 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:03:01,612 WARN L193 SmtUtils]: Spent 315.00 ms on a formula simplification that was a NOOP. DAG size: 202 [2020-10-28 00:03:01,613 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 00:03:01,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:03:01,620 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:03:01,626 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:03:01,626 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 00:03:01,626 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 00:03:01,626 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-28 00:03:01,626 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:03:01,627 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 00:03:01,627 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 00:03:01,627 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 00:03:01,627 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:03:01,643 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 00:03:01,644 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [736400616] [2020-10-28 00:03:01,644 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 00:03:01,644 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-28 00:03:01,644 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [308244230] [2020-10-28 00:03:01,644 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-28 00:03:01,644 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 00:03:01,645 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-28 00:03:01,645 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-10-28 00:03:01,645 INFO L87 Difference]: Start difference. First operand 81376 states and 124396 transitions. Second operand 7 states. [2020-10-28 00:03:02,042 WARN L193 SmtUtils]: Spent 320.00 ms on a formula simplification that was a NOOP. DAG size: 206 [2020-10-28 00:03:02,994 WARN L193 SmtUtils]: Spent 347.00 ms on a formula simplification that was a NOOP. DAG size: 208 [2020-10-28 00:03:03,363 WARN L193 SmtUtils]: Spent 339.00 ms on a formula simplification that was a NOOP. DAG size: 206 [2020-10-28 00:03:05,924 WARN L193 SmtUtils]: Spent 321.00 ms on a formula simplification that was a NOOP. DAG size: 204 [2020-10-28 00:03:06,308 WARN L193 SmtUtils]: Spent 322.00 ms on a formula simplification that was a NOOP. DAG size: 203 [2020-10-28 00:03:21,552 WARN L193 SmtUtils]: Spent 332.00 ms on a formula simplification that was a NOOP. DAG size: 206 [2020-10-28 00:03:21,973 WARN L193 SmtUtils]: Spent 333.00 ms on a formula simplification that was a NOOP. DAG size: 205