/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --rcfgbuilder.size.of.a.code.block SequenceOfStatements --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=SMALLESTAMONGWIDE --traceabstraction.additional.smt.options tolerance=0.3 --traceabstraction.additional.smt.options log-additional-information=true --traceabstraction.additional.smt.options unknown-allowed=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf language data_model -i ../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_lcr-var-start-time.5.2.ufo.BOUNDED-10.pals.c.v+cfa-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-29 13:49:57,799 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-29 13:49:57,803 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-29 13:49:57,843 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-29 13:49:57,843 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-29 13:49:57,845 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-29 13:49:57,846 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-29 13:49:57,849 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-29 13:49:57,851 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-29 13:49:57,852 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-29 13:49:57,854 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-29 13:49:57,855 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-29 13:49:57,856 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-29 13:49:57,857 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-29 13:49:57,858 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-29 13:49:57,860 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-29 13:49:57,861 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-29 13:49:57,862 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-29 13:49:57,864 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-29 13:49:57,867 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-29 13:49:57,869 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-29 13:49:57,880 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-29 13:49:57,881 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-29 13:49:57,882 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-29 13:49:57,886 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-29 13:49:57,886 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-29 13:49:57,886 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-29 13:49:57,888 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-29 13:49:57,888 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-29 13:49:57,890 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-29 13:49:57,890 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-29 13:49:57,891 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-29 13:49:57,892 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-29 13:49:57,893 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-29 13:49:57,894 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-29 13:49:57,913 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-29 13:49:57,914 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-29 13:49:57,914 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-29 13:49:57,915 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-29 13:49:57,916 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-29 13:49:57,917 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-29 13:49:57,918 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-29 13:49:57,944 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-29 13:49:57,944 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-29 13:49:57,946 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-29 13:49:57,946 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-29 13:49:57,946 INFO L138 SettingsManager]: * Use SBE=true [2020-10-29 13:49:57,947 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-29 13:49:57,947 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-29 13:49:57,947 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-29 13:49:57,947 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-29 13:49:57,948 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-29 13:49:57,948 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-29 13:49:57,948 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-29 13:49:57,948 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-29 13:49:57,949 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-29 13:49:57,949 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-29 13:49:57,949 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-29 13:49:57,949 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-29 13:49:57,950 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-29 13:49:57,950 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-29 13:49:57,950 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-29 13:49:57,950 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-29 13:49:57,951 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-29 13:49:57,951 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-29 13:49:57,951 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-29 13:49:57,952 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-29 13:49:57,952 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-29 13:49:57,952 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-29 13:49:57,952 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-29 13:49:57,953 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-29 13:49:57,953 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.3;log-additional-information=true;unknown-allowed=true; [2020-10-29 13:49:58,329 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-29 13:49:58,384 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-29 13:49:58,387 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-29 13:49:58,389 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-29 13:49:58,390 INFO L275 PluginConnector]: CDTParser initialized [2020-10-29 13:49:58,391 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_lcr-var-start-time.5.2.ufo.BOUNDED-10.pals.c.v+cfa-reducer.c [2020-10-29 13:49:58,480 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/c2ae04e77/22d6f13c795245b79fbb773580a962aa/FLAG516abac47 [2020-10-29 13:49:59,148 INFO L306 CDTParser]: Found 1 translation units. [2020-10-29 13:49:59,149 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/seq-mthreaded-reduced/pals_lcr-var-start-time.5.2.ufo.BOUNDED-10.pals.c.v+cfa-reducer.c [2020-10-29 13:49:59,161 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/c2ae04e77/22d6f13c795245b79fbb773580a962aa/FLAG516abac47 [2020-10-29 13:49:59,485 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/c2ae04e77/22d6f13c795245b79fbb773580a962aa [2020-10-29 13:49:59,489 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-29 13:49:59,496 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-29 13:49:59,498 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-29 13:49:59,498 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-29 13:49:59,502 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-29 13:49:59,503 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.10 01:49:59" (1/1) ... [2020-10-29 13:49:59,507 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@64e62242 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 01:49:59, skipping insertion in model container [2020-10-29 13:49:59,507 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.10 01:49:59" (1/1) ... [2020-10-29 13:49:59,515 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-29 13:49:59,554 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-29 13:49:59,831 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-29 13:49:59,848 INFO L203 MainTranslator]: Completed pre-run [2020-10-29 13:49:59,946 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-29 13:49:59,982 INFO L208 MainTranslator]: Completed translation [2020-10-29 13:49:59,983 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 01:49:59 WrapperNode [2020-10-29 13:49:59,983 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-29 13:49:59,984 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-29 13:49:59,984 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-29 13:49:59,984 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-29 13:49:59,998 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 01:49:59" (1/1) ... [2020-10-29 13:49:59,998 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 01:49:59" (1/1) ... [2020-10-29 13:50:00,011 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 01:49:59" (1/1) ... [2020-10-29 13:50:00,012 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 01:49:59" (1/1) ... [2020-10-29 13:50:00,028 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 01:49:59" (1/1) ... [2020-10-29 13:50:00,038 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 01:49:59" (1/1) ... [2020-10-29 13:50:00,042 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 01:49:59" (1/1) ... [2020-10-29 13:50:00,048 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-29 13:50:00,049 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-29 13:50:00,050 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-29 13:50:00,050 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-29 13:50:00,051 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 01:49:59" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-29 13:50:00,136 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-29 13:50:00,136 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-29 13:50:00,136 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-29 13:50:00,136 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-10-29 13:50:00,136 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-29 13:50:00,137 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-29 13:50:00,137 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-29 13:50:00,137 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-29 13:50:00,137 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-29 13:50:00,137 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-10-29 13:50:00,137 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-10-29 13:50:00,138 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2020-10-29 13:50:00,138 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-10-29 13:50:00,138 INFO L130 BoogieDeclarations]: Found specification of procedure read [2020-10-29 13:50:00,138 INFO L130 BoogieDeclarations]: Found specification of procedure write [2020-10-29 13:50:00,138 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2020-10-29 13:50:00,138 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2020-10-29 13:50:00,139 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2020-10-29 13:50:00,139 INFO L130 BoogieDeclarations]: Found specification of procedure node4 [2020-10-29 13:50:00,139 INFO L130 BoogieDeclarations]: Found specification of procedure node5 [2020-10-29 13:50:00,139 INFO L130 BoogieDeclarations]: Found specification of procedure init [2020-10-29 13:50:00,139 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-10-29 13:50:00,139 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-29 13:50:00,139 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-29 13:50:00,140 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-29 13:50:00,140 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-29 13:50:00,140 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-29 13:50:00,140 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-29 13:50:00,140 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-29 13:50:01,101 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-29 13:50:01,101 INFO L298 CfgBuilder]: Removed 0 assume(true) statements. [2020-10-29 13:50:01,103 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.10 01:50:01 BoogieIcfgContainer [2020-10-29 13:50:01,104 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-29 13:50:01,106 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-29 13:50:01,106 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-29 13:50:01,110 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-29 13:50:01,110 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 29.10 01:49:59" (1/3) ... [2020-10-29 13:50:01,111 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@325664f1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.10 01:50:01, skipping insertion in model container [2020-10-29 13:50:01,111 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 01:49:59" (2/3) ... [2020-10-29 13:50:01,112 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@325664f1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.10 01:50:01, skipping insertion in model container [2020-10-29 13:50:01,112 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.10 01:50:01" (3/3) ... [2020-10-29 13:50:01,114 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_lcr-var-start-time.5.2.ufo.BOUNDED-10.pals.c.v+cfa-reducer.c [2020-10-29 13:50:01,126 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-29 13:50:01,132 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-29 13:50:01,145 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-29 13:50:01,175 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-29 13:50:01,175 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-29 13:50:01,175 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-29 13:50:01,176 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-29 13:50:01,176 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-29 13:50:01,176 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-29 13:50:01,176 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-29 13:50:01,176 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-29 13:50:01,198 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states. [2020-10-29 13:50:01,208 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-10-29 13:50:01,208 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:50:01,209 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 13:50:01,210 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:50:01,216 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:50:01,216 INFO L82 PathProgramCache]: Analyzing trace with hash 818380633, now seen corresponding path program 1 times [2020-10-29 13:50:01,226 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:50:01,227 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1345559150] [2020-10-29 13:50:01,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:50:01,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:50:01,713 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:50:01,910 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:50:01,987 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:50:02,211 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:50:02,737 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:50:04,022 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:50:06,553 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:50:06,554 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 73 [2020-10-29 13:50:06,555 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-29 13:50:06,555 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5022 [2020-10-29 13:50:06,558 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:50:06,558 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:50:06,558 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-29 13:50:06,559 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-29 13:50:06,559 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 52 [2020-10-29 13:50:06,560 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-10-29 13:50:07,031 WARN L193 SmtUtils]: Spent 276.00 ms on a formula simplification that was a NOOP. DAG size: 175 [2020-10-29 13:50:07,034 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:50:07,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:50:07,048 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:50:07,061 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:50:07,062 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:50:07,062 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:50:07,062 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 17 [2020-10-29 13:50:07,062 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:50:07,062 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:50:07,063 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 13:50:07,063 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:50:07,063 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 13:50:07,063 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 13:50:07,097 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 13:50:07,098 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1345559150] [2020-10-29 13:50:07,100 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:50:07,100 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-10-29 13:50:07,101 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [776833232] [2020-10-29 13:50:07,106 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-29 13:50:07,107 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:50:07,122 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-29 13:50:07,123 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-10-29 13:50:07,125 INFO L87 Difference]: Start difference. First operand 140 states. Second operand 8 states. [2020-10-29 13:50:07,558 WARN L193 SmtUtils]: Spent 297.00 ms on a formula simplification that was a NOOP. DAG size: 185 [2020-10-29 13:50:08,845 WARN L193 SmtUtils]: Spent 300.00 ms on a formula simplification that was a NOOP. DAG size: 179 [2020-10-29 13:50:09,311 WARN L193 SmtUtils]: Spent 340.00 ms on a formula simplification that was a NOOP. DAG size: 181 [2020-10-29 13:50:09,675 WARN L193 SmtUtils]: Spent 329.00 ms on a formula simplification that was a NOOP. DAG size: 183 [2020-10-29 13:50:09,970 WARN L193 SmtUtils]: Spent 275.00 ms on a formula simplification that was a NOOP. DAG size: 177 [2020-10-29 13:50:10,046 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:50:10,046 INFO L93 Difference]: Finished difference Result 728 states and 1159 transitions. [2020-10-29 13:50:10,046 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-29 13:50:10,048 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 65 [2020-10-29 13:50:10,049 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:50:10,071 INFO L225 Difference]: With dead ends: 728 [2020-10-29 13:50:10,071 INFO L226 Difference]: Without dead ends: 603 [2020-10-29 13:50:10,076 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=91, Invalid=181, Unknown=0, NotChecked=0, Total=272 [2020-10-29 13:50:10,117 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 603 states. [2020-10-29 13:50:10,203 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 603 to 224. [2020-10-29 13:50:10,204 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 224 states. [2020-10-29 13:50:10,206 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 224 states to 224 states and 333 transitions. [2020-10-29 13:50:10,208 INFO L78 Accepts]: Start accepts. Automaton has 224 states and 333 transitions. Word has length 65 [2020-10-29 13:50:10,210 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:50:10,210 INFO L481 AbstractCegarLoop]: Abstraction has 224 states and 333 transitions. [2020-10-29 13:50:10,210 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-29 13:50:10,210 INFO L276 IsEmpty]: Start isEmpty. Operand 224 states and 333 transitions. [2020-10-29 13:50:10,223 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-10-29 13:50:10,224 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:50:10,224 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 13:50:10,224 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-29 13:50:10,225 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:50:10,226 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:50:10,229 INFO L82 PathProgramCache]: Analyzing trace with hash -974796233, now seen corresponding path program 1 times [2020-10-29 13:50:10,229 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:50:10,229 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1025503807] [2020-10-29 13:50:10,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:50:10,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:50:10,296 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:50:10,331 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:50:10,371 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:50:10,478 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:50:10,826 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:50:11,855 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:50:14,539 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:50:14,539 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 74 [2020-10-29 13:50:14,540 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-29 13:50:14,540 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4261 [2020-10-29 13:50:14,540 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:50:14,540 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:50:14,540 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 13:50:14,541 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 33 [2020-10-29 13:50:14,541 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-29 13:50:14,541 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:50:14,839 WARN L193 SmtUtils]: Spent 230.00 ms on a formula simplification that was a NOOP. DAG size: 175 [2020-10-29 13:50:14,842 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:50:14,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:50:14,859 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:50:14,872 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:50:14,872 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:50:14,872 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:50:14,873 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 15 [2020-10-29 13:50:14,873 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:50:14,873 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:50:14,873 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 13:50:14,873 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:50:14,873 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 13:50:14,874 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:50:14,897 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 13:50:14,898 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1025503807] [2020-10-29 13:50:14,898 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:50:14,899 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-29 13:50:14,900 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1914133646] [2020-10-29 13:50:14,902 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-29 13:50:14,903 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:50:14,914 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-29 13:50:14,914 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-29 13:50:14,914 INFO L87 Difference]: Start difference. First operand 224 states and 333 transitions. Second operand 4 states. [2020-10-29 13:50:15,241 WARN L193 SmtUtils]: Spent 278.00 ms on a formula simplification that was a NOOP. DAG size: 179 [2020-10-29 13:50:15,899 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:50:15,899 INFO L93 Difference]: Finished difference Result 562 states and 869 transitions. [2020-10-29 13:50:15,900 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-29 13:50:15,900 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 66 [2020-10-29 13:50:15,901 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:50:15,904 INFO L225 Difference]: With dead ends: 562 [2020-10-29 13:50:15,904 INFO L226 Difference]: Without dead ends: 377 [2020-10-29 13:50:15,907 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-29 13:50:15,907 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 377 states. [2020-10-29 13:50:15,944 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 377 to 374. [2020-10-29 13:50:15,944 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 374 states. [2020-10-29 13:50:15,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 374 states to 374 states and 571 transitions. [2020-10-29 13:50:15,947 INFO L78 Accepts]: Start accepts. Automaton has 374 states and 571 transitions. Word has length 66 [2020-10-29 13:50:15,947 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:50:15,947 INFO L481 AbstractCegarLoop]: Abstraction has 374 states and 571 transitions. [2020-10-29 13:50:15,947 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-29 13:50:15,948 INFO L276 IsEmpty]: Start isEmpty. Operand 374 states and 571 transitions. [2020-10-29 13:50:15,949 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-10-29 13:50:15,949 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:50:15,950 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] [2020-10-29 13:50:15,950 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-29 13:50:15,950 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:50:15,951 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:50:15,951 INFO L82 PathProgramCache]: Analyzing trace with hash -734833252, now seen corresponding path program 1 times [2020-10-29 13:50:15,951 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:50:15,952 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [442053316] [2020-10-29 13:50:15,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:50:15,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:50:16,006 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:50:16,041 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:50:16,073 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:50:16,164 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:50:16,907 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:50:18,250 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:50:18,250 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 75 [2020-10-29 13:50:18,250 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-29 13:50:18,250 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2261 [2020-10-29 13:50:18,251 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:50:18,251 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:50:18,251 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 13:50:18,251 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 21 [2020-10-29 13:50:18,251 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-29 13:50:18,252 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 13:50:18,577 WARN L193 SmtUtils]: Spent 277.00 ms on a formula simplification that was a NOOP. DAG size: 175 [2020-10-29 13:50:18,578 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:50:18,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:50:18,591 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:50:18,600 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:50:18,600 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:50:18,601 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:50:18,601 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12 [2020-10-29 13:50:18,601 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:50:18,601 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:50:18,602 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 13:50:18,602 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:50:18,602 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 13:50:18,602 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 13:50:18,627 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 13:50:18,629 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [442053316] [2020-10-29 13:50:18,630 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:50:18,630 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-29 13:50:18,630 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [448801800] [2020-10-29 13:50:18,631 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-29 13:50:18,631 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:50:18,631 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-29 13:50:18,632 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-29 13:50:18,632 INFO L87 Difference]: Start difference. First operand 374 states and 571 transitions. Second operand 4 states. [2020-10-29 13:50:18,949 WARN L193 SmtUtils]: Spent 272.00 ms on a formula simplification that was a NOOP. DAG size: 179 [2020-10-29 13:50:19,793 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:50:19,793 INFO L93 Difference]: Finished difference Result 980 states and 1531 transitions. [2020-10-29 13:50:19,794 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-29 13:50:19,794 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 67 [2020-10-29 13:50:19,797 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:50:19,801 INFO L225 Difference]: With dead ends: 980 [2020-10-29 13:50:19,801 INFO L226 Difference]: Without dead ends: 645 [2020-10-29 13:50:19,807 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-29 13:50:19,809 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 645 states. [2020-10-29 13:50:19,860 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 645 to 642. [2020-10-29 13:50:19,860 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 642 states. [2020-10-29 13:50:19,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 642 states to 642 states and 993 transitions. [2020-10-29 13:50:19,865 INFO L78 Accepts]: Start accepts. Automaton has 642 states and 993 transitions. Word has length 67 [2020-10-29 13:50:19,870 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:50:19,870 INFO L481 AbstractCegarLoop]: Abstraction has 642 states and 993 transitions. [2020-10-29 13:50:19,870 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-29 13:50:19,870 INFO L276 IsEmpty]: Start isEmpty. Operand 642 states and 993 transitions. [2020-10-29 13:50:19,872 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2020-10-29 13:50:19,873 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:50:19,873 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] [2020-10-29 13:50:19,873 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-29 13:50:19,873 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:50:19,874 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:50:19,874 INFO L82 PathProgramCache]: Analyzing trace with hash -1061048844, now seen corresponding path program 1 times [2020-10-29 13:50:19,875 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:50:19,875 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1363539149] [2020-10-29 13:50:19,875 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:50:19,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:50:19,934 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:50:19,963 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:50:19,993 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:50:20,374 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:50:20,940 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:50:20,940 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 76 [2020-10-29 13:50:20,940 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-29 13:50:20,940 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1023 [2020-10-29 13:50:20,940 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:50:20,941 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:50:20,941 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 13:50:20,941 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 25 [2020-10-29 13:50:20,941 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 31 [2020-10-29 13:50:20,941 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:50:21,315 WARN L193 SmtUtils]: Spent 328.00 ms on a formula simplification that was a NOOP. DAG size: 175 [2020-10-29 13:50:21,316 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:50:21,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:50:21,325 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:50:21,333 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:50:21,333 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:50:21,333 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:50:21,333 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-29 13:50:21,334 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:50:21,334 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:50:21,334 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 13:50:21,334 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:50:21,334 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 13:50:21,334 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:50:21,355 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 13:50:21,356 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1363539149] [2020-10-29 13:50:21,356 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:50:21,356 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-29 13:50:21,356 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1196438173] [2020-10-29 13:50:21,357 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-29 13:50:21,357 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:50:21,357 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-29 13:50:21,358 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-29 13:50:21,358 INFO L87 Difference]: Start difference. First operand 642 states and 993 transitions. Second operand 4 states. [2020-10-29 13:50:21,651 WARN L193 SmtUtils]: Spent 255.00 ms on a formula simplification that was a NOOP. DAG size: 179 [2020-10-29 13:50:22,479 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:50:22,479 INFO L93 Difference]: Finished difference Result 1720 states and 2693 transitions. [2020-10-29 13:50:22,480 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-29 13:50:22,480 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 68 [2020-10-29 13:50:22,480 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:50:22,487 INFO L225 Difference]: With dead ends: 1720 [2020-10-29 13:50:22,487 INFO L226 Difference]: Without dead ends: 1117 [2020-10-29 13:50:22,489 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 [2020-10-29 13:50:22,491 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1117 states. [2020-10-29 13:50:22,555 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1117 to 1114. [2020-10-29 13:50:22,555 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1114 states. [2020-10-29 13:50:22,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1114 states to 1114 states and 1729 transitions. [2020-10-29 13:50:22,561 INFO L78 Accepts]: Start accepts. Automaton has 1114 states and 1729 transitions. Word has length 68 [2020-10-29 13:50:22,561 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:50:22,561 INFO L481 AbstractCegarLoop]: Abstraction has 1114 states and 1729 transitions. [2020-10-29 13:50:22,561 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-29 13:50:22,561 INFO L276 IsEmpty]: Start isEmpty. Operand 1114 states and 1729 transitions. [2020-10-29 13:50:22,562 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2020-10-29 13:50:22,562 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:50:22,562 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] [2020-10-29 13:50:22,563 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-29 13:50:22,563 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:50:22,563 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:50:22,563 INFO L82 PathProgramCache]: Analyzing trace with hash 805896167, now seen corresponding path program 1 times [2020-10-29 13:50:22,564 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:50:22,564 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1505654013] [2020-10-29 13:50:22,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:50:22,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:50:22,617 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:50:22,661 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:50:22,850 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:50:23,161 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:50:23,161 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 77 [2020-10-29 13:50:23,161 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-29 13:50:23,161 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 565 [2020-10-29 13:50:23,161 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:50:23,162 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:50:23,162 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 13:50:23,162 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 17 [2020-10-29 13:50:23,162 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-29 13:50:23,162 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:50:23,440 WARN L193 SmtUtils]: Spent 233.00 ms on a formula simplification that was a NOOP. DAG size: 175 [2020-10-29 13:50:23,441 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:50:23,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:50:23,451 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:50:23,459 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:50:23,459 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:50:23,460 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:50:23,460 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-10-29 13:50:23,460 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:50:23,460 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:50:23,460 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 13:50:23,460 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:50:23,461 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 13:50:23,461 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:50:23,479 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 13:50:23,480 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1505654013] [2020-10-29 13:50:23,480 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:50:23,480 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-29 13:50:23,481 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2107697756] [2020-10-29 13:50:23,481 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-29 13:50:23,481 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:50:23,482 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-29 13:50:23,482 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-29 13:50:23,482 INFO L87 Difference]: Start difference. First operand 1114 states and 1729 transitions. Second operand 4 states. [2020-10-29 13:50:23,783 WARN L193 SmtUtils]: Spent 264.00 ms on a formula simplification that was a NOOP. DAG size: 179 [2020-10-29 13:50:24,773 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:50:24,773 INFO L93 Difference]: Finished difference Result 3088 states and 4821 transitions. [2020-10-29 13:50:24,773 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-29 13:50:24,774 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 69 [2020-10-29 13:50:24,776 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:50:24,787 INFO L225 Difference]: With dead ends: 3088 [2020-10-29 13:50:24,787 INFO L226 Difference]: Without dead ends: 2013 [2020-10-29 13:50:24,790 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-29 13:50:24,793 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2013 states. [2020-10-29 13:50:24,921 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2013 to 2010. [2020-10-29 13:50:24,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2010 states. [2020-10-29 13:50:24,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2010 states to 2010 states and 3113 transitions. [2020-10-29 13:50:24,935 INFO L78 Accepts]: Start accepts. Automaton has 2010 states and 3113 transitions. Word has length 69 [2020-10-29 13:50:24,936 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:50:24,936 INFO L481 AbstractCegarLoop]: Abstraction has 2010 states and 3113 transitions. [2020-10-29 13:50:24,936 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-29 13:50:24,936 INFO L276 IsEmpty]: Start isEmpty. Operand 2010 states and 3113 transitions. [2020-10-29 13:50:24,937 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2020-10-29 13:50:24,937 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:50:24,937 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] [2020-10-29 13:50:24,937 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-29 13:50:24,937 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:50:24,938 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:50:24,938 INFO L82 PathProgramCache]: Analyzing trace with hash 2076846012, now seen corresponding path program 1 times [2020-10-29 13:50:24,938 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:50:24,938 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [81503698] [2020-10-29 13:50:24,939 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:50:24,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:50:24,974 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:50:25,035 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:50:25,212 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:50:25,213 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 77 [2020-10-29 13:50:25,213 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 13:50:25,213 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 251 [2020-10-29 13:50:25,213 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:50:25,213 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:50:25,213 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 13:50:25,214 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 29 [2020-10-29 13:50:25,214 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-29 13:50:25,214 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:50:25,563 WARN L193 SmtUtils]: Spent 302.00 ms on a formula simplification that was a NOOP. DAG size: 175 [2020-10-29 13:50:25,564 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:50:25,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:50:25,575 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:50:25,587 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:50:25,587 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:50:25,587 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:50:25,588 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 13 [2020-10-29 13:50:25,588 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:50:25,588 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:50:25,589 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 13:50:25,589 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:50:25,589 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 13:50:25,589 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 13:50:25,624 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 13:50:25,624 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [81503698] [2020-10-29 13:50:25,626 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:50:25,627 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-29 13:50:25,627 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [583888040] [2020-10-29 13:50:25,629 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-29 13:50:25,629 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:50:25,630 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-29 13:50:25,630 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-29 13:50:25,630 INFO L87 Difference]: Start difference. First operand 2010 states and 3113 transitions. Second operand 4 states. [2020-10-29 13:50:26,112 WARN L193 SmtUtils]: Spent 433.00 ms on a formula simplification that was a NOOP. DAG size: 179 [2020-10-29 13:50:27,061 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:50:27,064 INFO L93 Difference]: Finished difference Result 5440 states and 8429 transitions. [2020-10-29 13:50:27,064 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-29 13:50:27,064 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 69 [2020-10-29 13:50:27,065 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:50:27,084 INFO L225 Difference]: With dead ends: 5440 [2020-10-29 13:50:27,084 INFO L226 Difference]: Without dead ends: 3469 [2020-10-29 13:50:27,092 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 [2020-10-29 13:50:27,096 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3469 states. [2020-10-29 13:50:27,287 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3469 to 3466. [2020-10-29 13:50:27,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3466 states. [2020-10-29 13:50:27,303 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3466 states to 3466 states and 5321 transitions. [2020-10-29 13:50:27,303 INFO L78 Accepts]: Start accepts. Automaton has 3466 states and 5321 transitions. Word has length 69 [2020-10-29 13:50:27,305 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:50:27,305 INFO L481 AbstractCegarLoop]: Abstraction has 3466 states and 5321 transitions. [2020-10-29 13:50:27,305 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-29 13:50:27,305 INFO L276 IsEmpty]: Start isEmpty. Operand 3466 states and 5321 transitions. [2020-10-29 13:50:27,306 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2020-10-29 13:50:27,306 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:50:27,306 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] [2020-10-29 13:50:27,306 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-29 13:50:27,306 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:50:27,307 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:50:27,307 INFO L82 PathProgramCache]: Analyzing trace with hash -1522525504, now seen corresponding path program 1 times [2020-10-29 13:50:27,307 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:50:27,308 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [158705748] [2020-10-29 13:50:27,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:50:27,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:50:27,349 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:50:27,566 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:50:28,065 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:50:28,065 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 78 [2020-10-29 13:50:28,066 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 13:50:28,066 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 731 [2020-10-29 13:50:28,066 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:50:28,066 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:50:28,066 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-29 13:50:28,066 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-29 13:50:28,067 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 54 [2020-10-29 13:50:28,067 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:50:28,470 WARN L193 SmtUtils]: Spent 262.00 ms on a formula simplification that was a NOOP. DAG size: 175 [2020-10-29 13:50:28,471 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:50:28,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:50:28,481 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:50:28,491 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:50:28,492 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:50:28,492 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:50:28,492 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 13 [2020-10-29 13:50:28,492 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:50:28,492 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:50:28,492 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 13:50:28,493 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:50:28,493 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 13:50:28,493 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:50:28,543 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 13:50:28,544 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [158705748] [2020-10-29 13:50:28,544 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:50:28,544 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-10-29 13:50:28,544 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [448632703] [2020-10-29 13:50:28,545 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-29 13:50:28,545 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:50:28,546 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-29 13:50:28,546 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-10-29 13:50:28,546 INFO L87 Difference]: Start difference. First operand 3466 states and 5321 transitions. Second operand 8 states. [2020-10-29 13:50:29,630 WARN L193 SmtUtils]: Spent 335.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-10-29 13:50:29,980 WARN L193 SmtUtils]: Spent 327.00 ms on a formula simplification that was a NOOP. DAG size: 186 [2020-10-29 13:50:30,303 WARN L193 SmtUtils]: Spent 296.00 ms on a formula simplification that was a NOOP. DAG size: 181 [2020-10-29 13:50:30,602 WARN L193 SmtUtils]: Spent 274.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-10-29 13:50:30,950 WARN L193 SmtUtils]: Spent 330.00 ms on a formula simplification that was a NOOP. DAG size: 190 [2020-10-29 13:50:32,800 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:50:32,801 INFO L93 Difference]: Finished difference Result 18041 states and 27507 transitions. [2020-10-29 13:50:32,801 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-29 13:50:32,802 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 70 [2020-10-29 13:50:32,802 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:50:32,884 INFO L225 Difference]: With dead ends: 18041 [2020-10-29 13:50:32,884 INFO L226 Difference]: Without dead ends: 14614 [2020-10-29 13:50:32,899 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=63, Invalid=93, Unknown=0, NotChecked=0, Total=156 [2020-10-29 13:50:32,918 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14614 states. [2020-10-29 13:50:34,091 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14614 to 14602. [2020-10-29 13:50:34,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14602 states. [2020-10-29 13:50:34,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14602 states to 14602 states and 22153 transitions. [2020-10-29 13:50:34,143 INFO L78 Accepts]: Start accepts. Automaton has 14602 states and 22153 transitions. Word has length 70 [2020-10-29 13:50:34,143 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:50:34,143 INFO L481 AbstractCegarLoop]: Abstraction has 14602 states and 22153 transitions. [2020-10-29 13:50:34,144 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-29 13:50:34,144 INFO L276 IsEmpty]: Start isEmpty. Operand 14602 states and 22153 transitions. [2020-10-29 13:50:34,145 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2020-10-29 13:50:34,145 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:50:34,145 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] [2020-10-29 13:50:34,145 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-29 13:50:34,145 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:50:34,146 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:50:34,146 INFO L82 PathProgramCache]: Analyzing trace with hash 878687465, now seen corresponding path program 1 times [2020-10-29 13:50:34,146 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:50:34,146 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [876974292] [2020-10-29 13:50:34,147 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:50:34,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:50:34,191 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:50:34,319 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:50:34,708 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:50:34,708 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 80 [2020-10-29 13:50:34,708 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 13:50:34,708 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 534 [2020-10-29 13:50:34,709 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:50:34,709 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:50:34,709 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-29 13:50:34,709 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-29 13:50:34,709 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 48 [2020-10-29 13:50:34,709 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:50:35,027 WARN L193 SmtUtils]: Spent 246.00 ms on a formula simplification that was a NOOP. DAG size: 175 [2020-10-29 13:50:35,028 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:50:35,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:50:35,044 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:50:35,064 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:50:35,064 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:50:35,065 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:50:35,065 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 25 [2020-10-29 13:50:35,065 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:50:35,065 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:50:35,065 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 13:50:35,066 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:50:35,066 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-29 13:50:35,066 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:50:35,092 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 13:50:35,093 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [876974292] [2020-10-29 13:50:35,093 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:50:35,093 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-29 13:50:35,094 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1096246379] [2020-10-29 13:50:35,094 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-29 13:50:35,094 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:50:35,096 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-29 13:50:35,098 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-29 13:50:35,099 INFO L87 Difference]: Start difference. First operand 14602 states and 22153 transitions. Second operand 6 states. [2020-10-29 13:50:35,412 WARN L193 SmtUtils]: Spent 258.00 ms on a formula simplification that was a NOOP. DAG size: 181 [2020-10-29 13:50:36,840 WARN L193 SmtUtils]: Spent 267.00 ms on a formula simplification that was a NOOP. DAG size: 180 [2020-10-29 13:50:37,909 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:50:37,909 INFO L93 Difference]: Finished difference Result 43728 states and 66381 transitions. [2020-10-29 13:50:37,910 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-29 13:50:37,911 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 72 [2020-10-29 13:50:37,911 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:50:38,011 INFO L225 Difference]: With dead ends: 43728 [2020-10-29 13:50:38,012 INFO L226 Difference]: Without dead ends: 29165 [2020-10-29 13:50:38,048 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2020-10-29 13:50:38,087 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29165 states. [2020-10-29 13:50:40,233 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29165 to 29162. [2020-10-29 13:50:40,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29162 states. [2020-10-29 13:50:40,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29162 states to 29162 states and 44009 transitions. [2020-10-29 13:50:40,316 INFO L78 Accepts]: Start accepts. Automaton has 29162 states and 44009 transitions. Word has length 72 [2020-10-29 13:50:40,317 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:50:40,317 INFO L481 AbstractCegarLoop]: Abstraction has 29162 states and 44009 transitions. [2020-10-29 13:50:40,317 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-29 13:50:40,317 INFO L276 IsEmpty]: Start isEmpty. Operand 29162 states and 44009 transitions. [2020-10-29 13:50:40,318 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2020-10-29 13:50:40,318 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:50:40,318 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] [2020-10-29 13:50:40,318 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-29 13:50:40,319 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:50:40,319 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:50:40,319 INFO L82 PathProgramCache]: Analyzing trace with hash -86764466, now seen corresponding path program 1 times [2020-10-29 13:50:40,319 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:50:40,320 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1762623334] [2020-10-29 13:50:40,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:50:40,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:50:40,360 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:50:40,491 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:50:40,491 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 80 [2020-10-29 13:50:40,491 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:50:40,491 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 147 [2020-10-29 13:50:40,491 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:50:40,492 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:50:40,492 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-29 13:50:40,492 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 73 [2020-10-29 13:50:40,492 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 3 [2020-10-29 13:50:40,492 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:50:40,834 WARN L193 SmtUtils]: Spent 255.00 ms on a formula simplification that was a NOOP. DAG size: 175 [2020-10-29 13:50:40,836 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:50:40,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:50:40,845 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:50:40,976 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:50:40,977 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:50:40,977 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:50:40,977 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 133 [2020-10-29 13:50:40,977 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:50:40,977 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:50:40,977 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 13:50:40,978 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:50:40,978 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 13:50:40,978 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:50:40,993 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 13:50:40,994 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1762623334] [2020-10-29 13:50:40,994 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:50:40,994 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-29 13:50:40,994 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2133302038] [2020-10-29 13:50:40,995 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-29 13:50:40,995 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:50:40,995 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-29 13:50:40,996 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-29 13:50:40,996 INFO L87 Difference]: Start difference. First operand 29162 states and 44009 transitions. Second operand 5 states. [2020-10-29 13:50:44,842 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:50:44,842 INFO L93 Difference]: Finished difference Result 59565 states and 89259 transitions. [2020-10-29 13:50:44,843 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-29 13:50:44,843 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 72 [2020-10-29 13:50:44,843 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:50:44,968 INFO L225 Difference]: With dead ends: 59565 [2020-10-29 13:50:44,968 INFO L226 Difference]: Without dead ends: 59562 [2020-10-29 13:50:44,988 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-29 13:50:45,050 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59562 states. [2020-10-29 13:50:47,209 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59562 to 30442. [2020-10-29 13:50:47,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30442 states. [2020-10-29 13:50:47,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30442 states to 30442 states and 45289 transitions. [2020-10-29 13:50:47,273 INFO L78 Accepts]: Start accepts. Automaton has 30442 states and 45289 transitions. Word has length 72 [2020-10-29 13:50:47,273 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:50:47,273 INFO L481 AbstractCegarLoop]: Abstraction has 30442 states and 45289 transitions. [2020-10-29 13:50:47,274 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-29 13:50:47,274 INFO L276 IsEmpty]: Start isEmpty. Operand 30442 states and 45289 transitions. [2020-10-29 13:50:47,275 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2020-10-29 13:50:47,275 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:50:47,275 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] [2020-10-29 13:50:47,275 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-29 13:50:47,275 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:50:47,276 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:50:47,276 INFO L82 PathProgramCache]: Analyzing trace with hash 1903204115, now seen corresponding path program 1 times [2020-10-29 13:50:47,276 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:50:47,276 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [837186459] [2020-10-29 13:50:47,276 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:50:47,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:50:47,315 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:50:47,410 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:50:47,410 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 81 [2020-10-29 13:50:47,411 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:50:47,411 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 110 [2020-10-29 13:50:47,411 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:50:47,411 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:50:47,411 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 13:50:47,411 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-29 13:50:47,411 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 62 [2020-10-29 13:50:47,412 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:50:47,699 WARN L193 SmtUtils]: Spent 241.00 ms on a formula simplification that was a NOOP. DAG size: 175 [2020-10-29 13:50:47,700 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:50:47,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:50:47,718 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:50:47,729 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:50:47,729 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:50:47,729 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:50:47,730 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 16 [2020-10-29 13:50:47,730 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:50:47,730 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:50:47,730 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 13:50:47,730 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:50:47,730 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 13:50:47,730 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:50:47,748 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 13:50:47,749 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [837186459] [2020-10-29 13:50:47,749 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:50:47,749 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-29 13:50:47,749 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1126377632] [2020-10-29 13:50:47,749 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-29 13:50:47,750 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:50:47,750 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-29 13:50:47,750 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-29 13:50:47,751 INFO L87 Difference]: Start difference. First operand 30442 states and 45289 transitions. Second operand 4 states. [2020-10-29 13:50:48,054 WARN L193 SmtUtils]: Spent 268.00 ms on a formula simplification that was a NOOP. DAG size: 177 [2020-10-29 13:50:51,812 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:50:51,812 INFO L93 Difference]: Finished difference Result 74194 states and 110327 transitions. [2020-10-29 13:50:51,812 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-29 13:50:51,813 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 73 [2020-10-29 13:50:51,813 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:50:51,917 INFO L225 Difference]: With dead ends: 74194 [2020-10-29 13:50:51,917 INFO L226 Difference]: Without dead ends: 43791 [2020-10-29 13:50:51,983 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-29 13:50:52,024 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43791 states. [2020-10-29 13:50:54,726 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43791 to 43788. [2020-10-29 13:50:54,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43788 states. [2020-10-29 13:50:54,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43788 states to 43788 states and 64787 transitions. [2020-10-29 13:50:54,808 INFO L78 Accepts]: Start accepts. Automaton has 43788 states and 64787 transitions. Word has length 73 [2020-10-29 13:50:54,808 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:50:54,808 INFO L481 AbstractCegarLoop]: Abstraction has 43788 states and 64787 transitions. [2020-10-29 13:50:54,808 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-29 13:50:54,809 INFO L276 IsEmpty]: Start isEmpty. Operand 43788 states and 64787 transitions. [2020-10-29 13:50:54,835 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2020-10-29 13:50:54,835 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:50:54,835 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 13:50:54,836 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-29 13:50:54,836 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:50:54,836 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:50:54,836 INFO L82 PathProgramCache]: Analyzing trace with hash -1014426299, now seen corresponding path program 1 times [2020-10-29 13:50:54,836 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:50:54,837 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1922231097] [2020-10-29 13:50:54,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:50:54,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:50:54,897 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:50:55,002 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:50:55,493 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:50:56,933 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:50:56,934 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 106 [2020-10-29 13:50:56,934 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-29 13:50:56,934 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2062 [2020-10-29 13:50:56,934 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:50:56,934 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:50:56,935 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-29 13:50:56,935 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-29 13:50:56,935 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 87 [2020-10-29 13:50:56,935 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:50:57,387 WARN L193 SmtUtils]: Spent 283.00 ms on a formula simplification that was a NOOP. DAG size: 175 [2020-10-29 13:50:57,388 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:50:57,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:50:57,396 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:50:57,407 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:50:57,407 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:50:57,407 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:50:57,407 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12 [2020-10-29 13:50:57,407 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:50:57,408 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:50:57,408 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 13:50:57,408 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:50:57,408 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 13:50:57,408 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:50:57,464 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-29 13:50:57,464 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1922231097] [2020-10-29 13:50:57,465 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 13:50:57,465 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-29 13:50:57,465 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [695741129] [2020-10-29 13:50:57,466 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-29 13:50:57,466 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:50:57,466 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-29 13:50:57,466 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-29 13:50:57,467 INFO L87 Difference]: Start difference. First operand 43788 states and 64787 transitions. Second operand 5 states. [2020-10-29 13:50:57,827 WARN L193 SmtUtils]: Spent 317.00 ms on a formula simplification that was a NOOP. DAG size: 183 [2020-10-29 13:50:59,361 WARN L193 SmtUtils]: Spent 272.00 ms on a formula simplification that was a NOOP. DAG size: 177 [2020-10-29 13:51:03,026 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:51:03,027 INFO L93 Difference]: Finished difference Result 103189 states and 153113 transitions. [2020-10-29 13:51:03,027 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-29 13:51:03,027 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 98 [2020-10-29 13:51:03,027 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:51:03,198 INFO L225 Difference]: With dead ends: 103189 [2020-10-29 13:51:03,199 INFO L226 Difference]: Without dead ends: 72786 [2020-10-29 13:51:03,251 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2020-10-29 13:51:03,334 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72786 states. [2020-10-29 13:51:08,306 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72786 to 72780. [2020-10-29 13:51:08,306 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72780 states. [2020-10-29 13:51:08,459 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72780 states to 72780 states and 107219 transitions. [2020-10-29 13:51:08,467 INFO L78 Accepts]: Start accepts. Automaton has 72780 states and 107219 transitions. Word has length 98 [2020-10-29 13:51:08,468 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:51:08,468 INFO L481 AbstractCegarLoop]: Abstraction has 72780 states and 107219 transitions. [2020-10-29 13:51:08,468 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-29 13:51:08,468 INFO L276 IsEmpty]: Start isEmpty. Operand 72780 states and 107219 transitions. [2020-10-29 13:51:08,490 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2020-10-29 13:51:08,491 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:51:08,491 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 13:51:08,491 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-29 13:51:08,491 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:51:08,492 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:51:08,492 INFO L82 PathProgramCache]: Analyzing trace with hash 404070508, now seen corresponding path program 1 times [2020-10-29 13:51:08,492 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:51:08,492 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [836033024] [2020-10-29 13:51:08,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:51:08,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:51:08,539 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:51:08,578 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:51:08,640 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:51:09,293 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:51:09,446 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:51:11,261 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:51:13,531 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:51:13,532 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 107 [2020-10-29 13:51:13,532 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-29 13:51:13,532 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5010 [2020-10-29 13:51:13,532 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:51:13,532 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:51:13,532 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-29 13:51:13,533 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-29 13:51:13,533 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 77 [2020-10-29 13:51:13,533 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:51:13,934 WARN L193 SmtUtils]: Spent 271.00 ms on a formula simplification that was a NOOP. DAG size: 175 [2020-10-29 13:51:13,935 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:51:13,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:51:13,954 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:51:13,983 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:51:13,983 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:51:13,983 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:51:13,983 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 34 [2020-10-29 13:51:13,984 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:51:13,985 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:51:13,985 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 13:51:13,985 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:51:13,985 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-29 13:51:13,986 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-29 13:51:14,045 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 12 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 13:51:14,046 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [836033024] [2020-10-29 13:51:14,046 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 13:51:14,047 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-29 13:51:14,047 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [342602950] [2020-10-29 13:51:14,047 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-29 13:51:14,048 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:51:14,048 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-29 13:51:14,050 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-10-29 13:51:14,051 INFO L87 Difference]: Start difference. First operand 72780 states and 107219 transitions. Second operand 8 states. [2020-10-29 13:51:14,429 WARN L193 SmtUtils]: Spent 302.00 ms on a formula simplification that was a NOOP. DAG size: 180 [2020-10-29 13:51:16,482 WARN L193 SmtUtils]: Spent 304.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-10-29 13:51:17,107 WARN L193 SmtUtils]: Spent 285.00 ms on a formula simplification that was a NOOP. DAG size: 182 [2020-10-29 13:51:24,551 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:51:24,551 INFO L93 Difference]: Finished difference Result 187860 states and 273925 transitions. [2020-10-29 13:51:24,551 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-29 13:51:24,552 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 99 [2020-10-29 13:51:24,552 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:51:24,788 INFO L225 Difference]: With dead ends: 187860 [2020-10-29 13:51:24,788 INFO L226 Difference]: Without dead ends: 115121 [2020-10-29 13:51:24,874 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=91, Invalid=215, Unknown=0, NotChecked=0, Total=306 [2020-10-29 13:51:24,995 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115121 states. [2020-10-29 13:51:31,246 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115121 to 75276. [2020-10-29 13:51:31,246 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75276 states. [2020-10-29 13:51:31,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75276 states to 75276 states and 108527 transitions. [2020-10-29 13:51:31,382 INFO L78 Accepts]: Start accepts. Automaton has 75276 states and 108527 transitions. Word has length 99 [2020-10-29 13:51:31,382 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:51:31,382 INFO L481 AbstractCegarLoop]: Abstraction has 75276 states and 108527 transitions. [2020-10-29 13:51:31,382 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-29 13:51:31,382 INFO L276 IsEmpty]: Start isEmpty. Operand 75276 states and 108527 transitions. [2020-10-29 13:51:31,399 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2020-10-29 13:51:31,399 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:51:31,399 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 13:51:31,399 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-29 13:51:31,400 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:51:31,400 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:51:31,400 INFO L82 PathProgramCache]: Analyzing trace with hash 1151895084, now seen corresponding path program 1 times [2020-10-29 13:51:31,400 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:51:31,400 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [864853875] [2020-10-29 13:51:31,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:51:31,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:51:31,454 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:51:31,498 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:51:32,113 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:51:34,064 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:51:34,064 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 107 [2020-10-29 13:51:34,064 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-29 13:51:34,064 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2627 [2020-10-29 13:51:34,064 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:51:34,065 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:51:34,065 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-29 13:51:34,065 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-29 13:51:34,065 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 86 [2020-10-29 13:51:34,065 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:51:34,427 WARN L193 SmtUtils]: Spent 260.00 ms on a formula simplification that was a NOOP. DAG size: 175 [2020-10-29 13:51:34,427 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:51:34,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:51:34,437 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:51:34,447 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:51:34,447 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:51:34,447 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:51:34,447 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12 [2020-10-29 13:51:34,447 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:51:34,447 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:51:34,448 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 13:51:34,448 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:51:34,448 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 13:51:34,448 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:51:34,484 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-10-29 13:51:34,484 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [864853875] [2020-10-29 13:51:34,485 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 13:51:34,485 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-29 13:51:34,485 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [302622424] [2020-10-29 13:51:34,485 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-29 13:51:34,486 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:51:34,487 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-29 13:51:34,487 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-10-29 13:51:34,487 INFO L87 Difference]: Start difference. First operand 75276 states and 108527 transitions. Second operand 8 states. [2020-10-29 13:51:34,868 WARN L193 SmtUtils]: Spent 310.00 ms on a formula simplification that was a NOOP. DAG size: 186 [2020-10-29 13:51:37,105 WARN L193 SmtUtils]: Spent 358.00 ms on a formula simplification that was a NOOP. DAG size: 179 [2020-10-29 13:51:37,469 WARN L193 SmtUtils]: Spent 336.00 ms on a formula simplification that was a NOOP. DAG size: 181 [2020-10-29 13:51:37,822 WARN L193 SmtUtils]: Spent 314.00 ms on a formula simplification that was a NOOP. DAG size: 177 [2020-10-29 13:51:47,833 WARN L193 SmtUtils]: Spent 298.00 ms on a formula simplification that was a NOOP. DAG size: 180 [2020-10-29 13:51:48,488 WARN L193 SmtUtils]: Spent 508.00 ms on a formula simplification that was a NOOP. DAG size: 182 [2020-10-29 13:51:48,878 WARN L193 SmtUtils]: Spent 352.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-10-29 13:51:49,253 WARN L193 SmtUtils]: Spent 290.00 ms on a formula simplification that was a NOOP. DAG size: 178 [2020-10-29 13:51:54,250 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:51:54,250 INFO L93 Difference]: Finished difference Result 256104 states and 374853 transitions. [2020-10-29 13:51:54,250 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-29 13:51:54,251 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 99 [2020-10-29 13:51:54,251 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:51:54,880 INFO L225 Difference]: With dead ends: 256104 [2020-10-29 13:51:54,880 INFO L226 Difference]: Without dead ends: 219717 [2020-10-29 13:51:54,973 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=151, Invalid=355, Unknown=0, NotChecked=0, Total=506 [2020-10-29 13:51:55,123 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 219717 states. [2020-10-29 13:52:06,828 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 219717 to 131372. [2020-10-29 13:52:06,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 131372 states. [2020-10-29 13:52:07,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131372 states to 131372 states and 189807 transitions. [2020-10-29 13:52:07,134 INFO L78 Accepts]: Start accepts. Automaton has 131372 states and 189807 transitions. Word has length 99 [2020-10-29 13:52:07,134 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:52:07,134 INFO L481 AbstractCegarLoop]: Abstraction has 131372 states and 189807 transitions. [2020-10-29 13:52:07,134 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-29 13:52:07,134 INFO L276 IsEmpty]: Start isEmpty. Operand 131372 states and 189807 transitions. [2020-10-29 13:52:07,157 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2020-10-29 13:52:07,157 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:52:07,158 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 13:52:07,158 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-29 13:52:07,158 INFO L429 AbstractCegarLoop]: === Iteration 14 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:52:07,158 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:52:07,158 INFO L82 PathProgramCache]: Analyzing trace with hash -1730408275, now seen corresponding path program 1 times [2020-10-29 13:52:07,159 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:52:07,159 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1608881404] [2020-10-29 13:52:07,159 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:52:07,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:52:07,464 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:52:07,495 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:52:07,640 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:52:07,746 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:52:07,844 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:52:09,185 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:52:10,950 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:52:12,448 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:52:12,449 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 107 [2020-10-29 13:52:12,449 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-29 13:52:12,449 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-29 13:52:12,449 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:52:12,449 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:52:12,449 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-29 13:52:12,449 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-29 13:52:12,450 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 86 [2020-10-29 13:52:12,450 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:52:12,852 WARN L193 SmtUtils]: Spent 286.00 ms on a formula simplification that was a NOOP. DAG size: 175 [2020-10-29 13:52:12,853 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:52:12,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:52:12,860 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:52:12,866 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:52:12,866 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:52:12,866 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:52:12,866 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-29 13:52:12,866 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:52:12,867 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:52:12,867 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 13:52:12,867 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:52:12,867 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 13:52:12,867 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:52:12,905 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2020-10-29 13:52:12,905 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1608881404] [2020-10-29 13:52:12,906 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 13:52:12,906 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-29 13:52:12,906 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1694611835] [2020-10-29 13:52:12,906 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-29 13:52:12,907 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:52:12,907 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-29 13:52:12,907 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-10-29 13:52:12,908 INFO L87 Difference]: Start difference. First operand 131372 states and 189807 transitions. Second operand 8 states. [2020-10-29 13:52:13,299 WARN L193 SmtUtils]: Spent 314.00 ms on a formula simplification that was a NOOP. DAG size: 186 [2020-10-29 13:52:15,345 WARN L193 SmtUtils]: Spent 293.00 ms on a formula simplification that was a NOOP. DAG size: 181 [2020-10-29 13:52:15,632 WARN L193 SmtUtils]: Spent 259.00 ms on a formula simplification that was a NOOP. DAG size: 177 [2020-10-29 13:52:16,179 WARN L193 SmtUtils]: Spent 270.00 ms on a formula simplification that was a NOOP. DAG size: 179 [2020-10-29 13:52:28,177 WARN L193 SmtUtils]: Spent 301.00 ms on a formula simplification that was a NOOP. DAG size: 180 [2020-10-29 13:52:28,704 WARN L193 SmtUtils]: Spent 315.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-10-29 13:52:29,094 WARN L193 SmtUtils]: Spent 292.00 ms on a formula simplification that was a NOOP. DAG size: 178 [2020-10-29 13:52:29,475 WARN L193 SmtUtils]: Spent 283.00 ms on a formula simplification that was a NOOP. DAG size: 182 [2020-10-29 13:52:35,469 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:52:35,469 INFO L93 Difference]: Finished difference Result 273800 states and 397645 transitions. [2020-10-29 13:52:35,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-29 13:52:35,469 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 99 [2020-10-29 13:52:35,470 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:52:36,085 INFO L225 Difference]: With dead ends: 273800 [2020-10-29 13:52:36,086 INFO L226 Difference]: Without dead ends: 242181 [2020-10-29 13:52:36,156 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=151, Invalid=355, Unknown=0, NotChecked=0, Total=506 [2020-10-29 13:52:36,318 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 242181 states. [2020-10-29 13:52:49,596 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 242181 to 147580. [2020-10-29 13:52:49,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 147580 states. [2020-10-29 13:52:49,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147580 states to 147580 states and 213279 transitions. [2020-10-29 13:52:49,950 INFO L78 Accepts]: Start accepts. Automaton has 147580 states and 213279 transitions. Word has length 99 [2020-10-29 13:52:49,951 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:52:49,951 INFO L481 AbstractCegarLoop]: Abstraction has 147580 states and 213279 transitions. [2020-10-29 13:52:49,951 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-29 13:52:49,951 INFO L276 IsEmpty]: Start isEmpty. Operand 147580 states and 213279 transitions. [2020-10-29 13:52:49,964 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2020-10-29 13:52:49,964 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:52:49,964 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 13:52:49,965 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-29 13:52:49,965 INFO L429 AbstractCegarLoop]: === Iteration 15 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:52:49,965 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:52:49,965 INFO L82 PathProgramCache]: Analyzing trace with hash 357550148, now seen corresponding path program 1 times [2020-10-29 13:52:49,966 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:52:49,966 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2033348020] [2020-10-29 13:52:49,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:52:49,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:52:50,004 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:52:50,027 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:52:50,434 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:52:50,480 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:52:52,304 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:52:52,325 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:52:53,841 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:52:55,000 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:52:55,001 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 107 [2020-10-29 13:52:55,001 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-29 13:52:55,001 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5009 [2020-10-29 13:52:55,001 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:52:55,001 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:52:55,001 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-29 13:52:55,001 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-29 13:52:55,001 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 93 [2020-10-29 13:52:55,001 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:52:55,470 WARN L193 SmtUtils]: Spent 273.00 ms on a formula simplification that was a NOOP. DAG size: 175 [2020-10-29 13:52:55,471 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:52:55,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:52:55,483 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:52:55,496 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:52:55,496 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:52:55,496 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:52:55,496 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 16 [2020-10-29 13:52:55,496 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:52:55,497 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:52:55,497 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 13:52:55,497 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:52:55,497 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-29 13:52:55,497 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:52:55,535 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 4 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 13:52:55,535 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2033348020] [2020-10-29 13:52:55,535 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 13:52:55,535 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-29 13:52:55,536 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1134009707] [2020-10-29 13:52:55,536 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-29 13:52:55,536 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:52:55,536 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-29 13:52:55,537 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-10-29 13:52:55,537 INFO L87 Difference]: Start difference. First operand 147580 states and 213279 transitions. Second operand 8 states. [2020-10-29 13:52:55,881 WARN L193 SmtUtils]: Spent 293.00 ms on a formula simplification that was a NOOP. DAG size: 182 [2020-10-29 13:52:58,833 WARN L193 SmtUtils]: Spent 310.00 ms on a formula simplification that was a NOOP. DAG size: 186 [2020-10-29 13:52:59,679 WARN L193 SmtUtils]: Spent 295.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-10-29 13:53:31,844 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:53:31,844 INFO L93 Difference]: Finished difference Result 486384 states and 699015 transitions. [2020-10-29 13:53:31,844 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-29 13:53:31,844 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 99 [2020-10-29 13:53:31,845 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:53:32,715 INFO L225 Difference]: With dead ends: 486384 [2020-10-29 13:53:32,715 INFO L226 Difference]: Without dead ends: 338845 [2020-10-29 13:53:32,858 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=91, Invalid=215, Unknown=0, NotChecked=0, Total=306 [2020-10-29 13:53:33,111 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 338845 states.