/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=SHALLOWEST --traceabstraction.additional.smt.options log-additional-information=true --traceabstraction.additional.smt.options unknown-allowed=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf language data_model -i ../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_lcr.7.1.ufo.BOUNDED-14.pals.c.v+lhb-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-27 05:28:49,800 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-27 05:28:49,802 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-27 05:28:49,837 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-27 05:28:49,838 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-27 05:28:49,839 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-27 05:28:49,841 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-27 05:28:49,844 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-27 05:28:49,846 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-27 05:28:49,847 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-27 05:28:49,849 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-27 05:28:49,850 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-27 05:28:49,851 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-27 05:28:49,852 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-27 05:28:49,853 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-27 05:28:49,855 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-27 05:28:49,856 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-27 05:28:49,857 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-27 05:28:49,873 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-27 05:28:49,876 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-27 05:28:49,878 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-27 05:28:49,880 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-27 05:28:49,882 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-27 05:28:49,883 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-27 05:28:49,886 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-27 05:28:49,887 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-27 05:28:49,887 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-27 05:28:49,889 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-27 05:28:49,889 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-27 05:28:49,890 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-27 05:28:49,891 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-27 05:28:49,892 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-27 05:28:49,893 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-27 05:28:49,894 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-27 05:28:49,895 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-27 05:28:49,896 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-27 05:28:49,897 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-27 05:28:49,897 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-27 05:28:49,897 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-27 05:28:49,899 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-27 05:28:49,900 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-27 05:28:49,901 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-27 05:28:49,951 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-27 05:28:49,951 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-27 05:28:49,953 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-27 05:28:49,953 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-27 05:28:49,954 INFO L138 SettingsManager]: * Use SBE=true [2020-10-27 05:28:49,954 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-27 05:28:49,954 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-27 05:28:49,955 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-27 05:28:49,955 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-27 05:28:49,955 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-27 05:28:49,955 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-27 05:28:49,956 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-27 05:28:49,956 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-27 05:28:49,956 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-27 05:28:49,956 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-27 05:28:49,957 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-27 05:28:49,957 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-27 05:28:49,957 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-27 05:28:49,958 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-27 05:28:49,958 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-27 05:28:49,958 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-27 05:28:49,959 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-27 05:28:49,959 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-27 05:28:49,959 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-27 05:28:49,959 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-27 05:28:49,960 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-27 05:28:49,960 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-27 05:28:49,960 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-27 05:28:49,960 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-27 05:28:49,961 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SHALLOWEST;log-additional-information=true;unknown-allowed=true; [2020-10-27 05:28:50,325 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-27 05:28:50,356 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-27 05:28:50,359 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-27 05:28:50,360 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-27 05:28:50,361 INFO L275 PluginConnector]: CDTParser initialized [2020-10-27 05:28:50,362 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_lcr.7.1.ufo.BOUNDED-14.pals.c.v+lhb-reducer.c [2020-10-27 05:28:50,444 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/55985b0d5/2a05acc768174cd5bbbebd9ca0060a13/FLAG62d1dd977 [2020-10-27 05:28:51,567 INFO L306 CDTParser]: Found 1 translation units. [2020-10-27 05:28:51,568 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/seq-mthreaded-reduced/pals_lcr.7.1.ufo.BOUNDED-14.pals.c.v+lhb-reducer.c [2020-10-27 05:28:51,633 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/55985b0d5/2a05acc768174cd5bbbebd9ca0060a13/FLAG62d1dd977 [2020-10-27 05:28:51,955 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/55985b0d5/2a05acc768174cd5bbbebd9ca0060a13 [2020-10-27 05:28:51,958 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-27 05:28:51,966 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-27 05:28:51,969 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-27 05:28:51,969 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-27 05:28:51,973 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-27 05:28:51,975 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 05:28:51" (1/1) ... [2020-10-27 05:28:51,980 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5828a90f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 05:28:51, skipping insertion in model container [2020-10-27 05:28:51,980 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 05:28:51" (1/1) ... [2020-10-27 05:28:51,989 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-27 05:28:52,249 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-27 05:28:54,388 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 05:28:54,405 INFO L203 MainTranslator]: Completed pre-run [2020-10-27 05:28:55,640 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 05:28:55,694 INFO L208 MainTranslator]: Completed translation [2020-10-27 05:28:55,694 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 05:28:55 WrapperNode [2020-10-27 05:28:55,695 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-27 05:28:55,697 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-27 05:28:55,697 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-27 05:28:55,697 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-27 05:28:55,713 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 05:28:55" (1/1) ... [2020-10-27 05:28:55,715 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 05:28:55" (1/1) ... [2020-10-27 05:28:55,801 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 05:28:55" (1/1) ... [2020-10-27 05:28:55,801 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 05:28:55" (1/1) ... [2020-10-27 05:28:55,906 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 05:28:55" (1/1) ... [2020-10-27 05:28:55,947 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 05:28:55" (1/1) ... [2020-10-27 05:28:55,971 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 05:28:55" (1/1) ... [2020-10-27 05:28:56,005 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-27 05:28:56,007 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-27 05:28:56,007 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-27 05:28:56,008 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-27 05:28:56,008 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 05:28:55" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-27 05:28:56,086 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-27 05:28:56,086 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-27 05:28:56,086 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-27 05:28:56,086 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-10-27 05:28:56,087 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-27 05:28:56,087 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-27 05:28:56,087 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-27 05:28:56,087 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-27 05:28:56,087 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-27 05:28:56,087 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-10-27 05:28:56,088 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-10-27 05:28:56,088 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2020-10-27 05:28:56,088 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-10-27 05:28:56,088 INFO L130 BoogieDeclarations]: Found specification of procedure read [2020-10-27 05:28:56,088 INFO L130 BoogieDeclarations]: Found specification of procedure write [2020-10-27 05:28:56,088 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2020-10-27 05:28:56,089 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2020-10-27 05:28:56,089 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2020-10-27 05:28:56,089 INFO L130 BoogieDeclarations]: Found specification of procedure node4 [2020-10-27 05:28:56,089 INFO L130 BoogieDeclarations]: Found specification of procedure node5 [2020-10-27 05:28:56,089 INFO L130 BoogieDeclarations]: Found specification of procedure node6 [2020-10-27 05:28:56,089 INFO L130 BoogieDeclarations]: Found specification of procedure node7 [2020-10-27 05:28:56,089 INFO L130 BoogieDeclarations]: Found specification of procedure init [2020-10-27 05:28:56,089 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-10-27 05:28:56,090 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-27 05:28:56,090 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-27 05:28:56,090 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-27 05:28:56,090 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-27 05:28:56,090 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-27 05:28:56,090 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-27 05:28:56,090 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-27 05:29:03,439 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-27 05:29:03,440 INFO L298 CfgBuilder]: Removed 0 assume(true) statements. [2020-10-27 05:29:03,450 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 05:29:03 BoogieIcfgContainer [2020-10-27 05:29:03,451 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-27 05:29:03,453 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-27 05:29:03,453 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-27 05:29:03,457 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-27 05:29:03,458 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.10 05:28:51" (1/3) ... [2020-10-27 05:29:03,459 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7c2a03a9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 05:29:03, skipping insertion in model container [2020-10-27 05:29:03,459 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 05:28:55" (2/3) ... [2020-10-27 05:29:03,460 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7c2a03a9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 05:29:03, skipping insertion in model container [2020-10-27 05:29:03,460 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 05:29:03" (3/3) ... [2020-10-27 05:29:03,463 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_lcr.7.1.ufo.BOUNDED-14.pals.c.v+lhb-reducer.c [2020-10-27 05:29:03,479 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-27 05:29:03,488 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-27 05:29:03,506 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-27 05:29:03,617 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-27 05:29:03,617 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-27 05:29:03,618 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-27 05:29:03,618 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-27 05:29:03,618 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-27 05:29:03,618 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-27 05:29:03,618 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-27 05:29:03,618 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-27 05:29:03,700 INFO L276 IsEmpty]: Start isEmpty. Operand 2091 states. [2020-10-27 05:29:03,754 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2020-10-27 05:29:03,754 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:29:03,755 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 05:29:03,756 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:29:03,765 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:29:03,767 INFO L82 PathProgramCache]: Analyzing trace with hash 1948812266, now seen corresponding path program 1 times [2020-10-27 05:29:03,781 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:29:03,782 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1684076339] [2020-10-27 05:29:03,782 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:29:04,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:29:04,581 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:29:05,056 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:29:05,427 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:29:05,624 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:29:05,806 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:29:06,413 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:29:07,020 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:29:07,521 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:29:08,064 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:29:08,585 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:29:09,478 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:29:09,479 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 114 [2020-10-27 05:29:09,479 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 10 [2020-10-27 05:29:09,480 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5047 [2020-10-27 05:29:09,483 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:29:09,483 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 05:29:09,483 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 05:29:09,483 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 65 [2020-10-27 05:29:09,484 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-27 05:29:13,636 WARN L193 SmtUtils]: Spent 3.79 s on a formula simplification that was a NOOP. DAG size: 799 [2020-10-27 05:29:13,639 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:29:13,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:29:13,710 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:29:13,828 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:29:13,828 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:29:13,828 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:29:13,829 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 144 [2020-10-27 05:29:13,829 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:29:13,829 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 05:29:13,829 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:29:13,829 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 05:29:13,829 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:29:13,982 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 05:29:13,983 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1684076339] [2020-10-27 05:29:13,985 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:29:13,985 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-27 05:29:13,986 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [24891790] [2020-10-27 05:29:13,991 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-27 05:29:13,991 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:29:14,007 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-27 05:29:14,008 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-10-27 05:29:14,010 INFO L87 Difference]: Start difference. First operand 2091 states. Second operand 6 states. [2020-10-27 05:29:18,223 WARN L193 SmtUtils]: Spent 4.03 s on a formula simplification that was a NOOP. DAG size: 808 [2020-10-27 05:29:43,202 WARN L193 SmtUtils]: Spent 4.05 s on a formula simplification that was a NOOP. DAG size: 806 [2020-10-27 05:29:44,459 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:29:44,459 INFO L93 Difference]: Finished difference Result 3633 states and 6476 transitions. [2020-10-27 05:29:44,460 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-27 05:29:44,462 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 106 [2020-10-27 05:29:44,462 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:29:44,500 INFO L225 Difference]: With dead ends: 3633 [2020-10-27 05:29:44,502 INFO L226 Difference]: Without dead ends: 2109 [2020-10-27 05:29:44,524 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 12.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2020-10-27 05:29:44,548 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2109 states. [2020-10-27 05:29:44,714 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2109 to 2027. [2020-10-27 05:29:44,716 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2027 states. [2020-10-27 05:29:44,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2027 states to 2027 states and 2763 transitions. [2020-10-27 05:29:44,727 INFO L78 Accepts]: Start accepts. Automaton has 2027 states and 2763 transitions. Word has length 106 [2020-10-27 05:29:44,728 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:29:44,728 INFO L481 AbstractCegarLoop]: Abstraction has 2027 states and 2763 transitions. [2020-10-27 05:29:44,728 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-27 05:29:44,728 INFO L276 IsEmpty]: Start isEmpty. Operand 2027 states and 2763 transitions. [2020-10-27 05:29:44,736 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2020-10-27 05:29:44,736 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:29:44,737 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 05:29:44,737 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-27 05:29:44,737 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:29:44,738 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:29:44,738 INFO L82 PathProgramCache]: Analyzing trace with hash -1460411003, now seen corresponding path program 1 times [2020-10-27 05:29:44,739 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:29:44,739 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [7083508] [2020-10-27 05:29:44,739 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:29:44,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:29:44,923 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:29:45,121 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:29:45,257 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:29:45,386 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:29:45,503 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:29:46,049 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:29:47,852 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:29:47,964 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:29:49,176 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:29:49,327 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:29:49,875 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:29:49,876 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 115 [2020-10-27 05:29:49,876 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 10 [2020-10-27 05:29:49,876 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5029 [2020-10-27 05:29:49,876 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:29:49,876 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 05:29:49,877 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 05:29:49,877 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 63 [2020-10-27 05:29:49,877 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:29:54,490 WARN L193 SmtUtils]: Spent 4.39 s on a formula simplification that was a NOOP. DAG size: 799 [2020-10-27 05:29:54,494 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:29:54,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:29:54,554 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:29:54,638 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:29:54,638 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:29:54,638 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:29:54,639 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 103 [2020-10-27 05:29:54,639 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:29:54,639 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 05:29:54,639 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:29:54,639 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 05:29:54,639 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:29:54,741 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 05:29:54,742 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [7083508] [2020-10-27 05:29:54,742 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:29:54,742 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-27 05:29:54,742 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1709516930] [2020-10-27 05:29:54,744 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-27 05:29:54,744 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:29:54,745 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-27 05:29:54,745 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-27 05:29:54,745 INFO L87 Difference]: Start difference. First operand 2027 states and 2763 transitions. Second operand 6 states. [2020-10-27 05:29:58,951 WARN L193 SmtUtils]: Spent 4.04 s on a formula simplification that was a NOOP. DAG size: 805 [2020-10-27 05:30:12,601 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:30:12,601 INFO L93 Difference]: Finished difference Result 3475 states and 4884 transitions. [2020-10-27 05:30:12,602 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-27 05:30:12,602 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 107 [2020-10-27 05:30:12,603 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:30:12,613 INFO L225 Difference]: With dead ends: 3475 [2020-10-27 05:30:12,613 INFO L226 Difference]: Without dead ends: 1771 [2020-10-27 05:30:12,618 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 8.5s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2020-10-27 05:30:12,622 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1771 states. [2020-10-27 05:30:12,700 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1771 to 1771. [2020-10-27 05:30:12,700 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1771 states. [2020-10-27 05:30:12,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1771 states to 1771 states and 2473 transitions. [2020-10-27 05:30:12,707 INFO L78 Accepts]: Start accepts. Automaton has 1771 states and 2473 transitions. Word has length 107 [2020-10-27 05:30:12,707 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:30:12,707 INFO L481 AbstractCegarLoop]: Abstraction has 1771 states and 2473 transitions. [2020-10-27 05:30:12,707 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-27 05:30:12,708 INFO L276 IsEmpty]: Start isEmpty. Operand 1771 states and 2473 transitions. [2020-10-27 05:30:12,713 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2020-10-27 05:30:12,713 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:30:12,713 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 05:30:12,714 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-27 05:30:12,714 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:30:12,714 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:30:12,715 INFO L82 PathProgramCache]: Analyzing trace with hash 1744702600, now seen corresponding path program 1 times [2020-10-27 05:30:12,715 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:30:12,715 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [907320376] [2020-10-27 05:30:12,715 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:30:12,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:30:12,861 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:30:13,015 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:30:13,167 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:30:13,287 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:30:13,403 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:30:15,058 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:30:15,453 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:30:17,054 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:30:17,821 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:30:17,821 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 116 [2020-10-27 05:30:17,822 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-27 05:30:17,822 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5018 [2020-10-27 05:30:17,822 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:30:17,822 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 05:30:17,822 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 05:30:17,822 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 75 [2020-10-27 05:30:17,823 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:30:22,191 WARN L193 SmtUtils]: Spent 4.13 s on a formula simplification that was a NOOP. DAG size: 799 [2020-10-27 05:30:22,193 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:30:22,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:30:22,243 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:30:22,335 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:30:22,335 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:30:22,335 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:30:22,335 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 109 [2020-10-27 05:30:22,335 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:30:22,336 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 05:30:22,336 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:30:22,336 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 05:30:22,336 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:30:22,430 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 05:30:22,431 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [907320376] [2020-10-27 05:30:22,431 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:30:22,431 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-27 05:30:22,431 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1118253116] [2020-10-27 05:30:22,432 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-27 05:30:22,432 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:30:22,432 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-27 05:30:22,433 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-10-27 05:30:22,433 INFO L87 Difference]: Start difference. First operand 1771 states and 2473 transitions. Second operand 6 states. [2020-10-27 05:30:26,477 WARN L193 SmtUtils]: Spent 3.88 s on a formula simplification that was a NOOP. DAG size: 808 [2020-10-27 05:30:42,353 WARN L193 SmtUtils]: Spent 3.92 s on a formula simplification that was a NOOP. DAG size: 806 [2020-10-27 05:30:43,404 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:30:43,405 INFO L93 Difference]: Finished difference Result 3679 states and 5157 transitions. [2020-10-27 05:30:43,407 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-27 05:30:43,407 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 108 [2020-10-27 05:30:43,408 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:30:43,419 INFO L225 Difference]: With dead ends: 3679 [2020-10-27 05:30:43,419 INFO L226 Difference]: Without dead ends: 2151 [2020-10-27 05:30:43,423 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 12.1s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2020-10-27 05:30:43,427 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2151 states. [2020-10-27 05:30:43,541 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2151 to 2071. [2020-10-27 05:30:43,541 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2071 states. [2020-10-27 05:30:43,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2071 states to 2071 states and 2861 transitions. [2020-10-27 05:30:43,549 INFO L78 Accepts]: Start accepts. Automaton has 2071 states and 2861 transitions. Word has length 108 [2020-10-27 05:30:43,549 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:30:43,549 INFO L481 AbstractCegarLoop]: Abstraction has 2071 states and 2861 transitions. [2020-10-27 05:30:43,549 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-27 05:30:43,549 INFO L276 IsEmpty]: Start isEmpty. Operand 2071 states and 2861 transitions. [2020-10-27 05:30:43,555 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2020-10-27 05:30:43,555 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:30:43,556 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 05:30:43,556 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-27 05:30:43,556 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:30:43,556 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:30:43,557 INFO L82 PathProgramCache]: Analyzing trace with hash -1071497307, now seen corresponding path program 1 times [2020-10-27 05:30:43,557 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:30:43,557 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1941064504] [2020-10-27 05:30:43,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:30:43,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:30:43,724 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:30:43,877 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:30:43,997 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:30:44,098 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:30:44,528 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:30:46,384 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:30:46,483 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:30:47,232 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:30:47,439 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:30:47,586 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:30:48,672 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:30:48,672 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 117 [2020-10-27 05:30:48,672 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 10 [2020-10-27 05:30:48,672 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5018 [2020-10-27 05:30:48,673 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:30:48,673 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 05:30:48,673 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 05:30:48,673 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 61 [2020-10-27 05:30:48,673 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:30:52,983 WARN L193 SmtUtils]: Spent 4.11 s on a formula simplification that was a NOOP. DAG size: 799 [2020-10-27 05:30:52,986 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:30:53,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:30:53,036 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:30:53,108 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:30:53,108 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:30:53,108 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:30:53,108 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 88 [2020-10-27 05:30:53,109 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:30:53,109 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 05:30:53,109 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:30:53,109 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 05:30:53,109 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:30:53,193 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 05:30:53,194 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1941064504] [2020-10-27 05:30:53,194 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:30:53,194 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-27 05:30:53,194 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1888476941] [2020-10-27 05:30:53,195 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-27 05:30:53,195 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:30:53,196 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-27 05:30:53,196 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-10-27 05:30:53,196 INFO L87 Difference]: Start difference. First operand 2071 states and 2861 transitions. Second operand 6 states. [2020-10-27 05:30:57,284 WARN L193 SmtUtils]: Spent 3.94 s on a formula simplification that was a NOOP. DAG size: 808 [2020-10-27 05:31:12,184 WARN L193 SmtUtils]: Spent 4.09 s on a formula simplification that was a NOOP. DAG size: 806 [2020-10-27 05:31:13,237 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:31:13,237 INFO L93 Difference]: Finished difference Result 5004 states and 7045 transitions. [2020-10-27 05:31:13,242 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-27 05:31:13,243 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 109 [2020-10-27 05:31:13,243 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:31:13,258 INFO L225 Difference]: With dead ends: 5004 [2020-10-27 05:31:13,258 INFO L226 Difference]: Without dead ends: 3085 [2020-10-27 05:31:13,263 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 12.3s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2020-10-27 05:31:13,268 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3085 states. [2020-10-27 05:31:13,421 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3085 to 3003. [2020-10-27 05:31:13,421 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3003 states. [2020-10-27 05:31:13,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3003 states to 3003 states and 4255 transitions. [2020-10-27 05:31:13,432 INFO L78 Accepts]: Start accepts. Automaton has 3003 states and 4255 transitions. Word has length 109 [2020-10-27 05:31:13,432 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:31:13,432 INFO L481 AbstractCegarLoop]: Abstraction has 3003 states and 4255 transitions. [2020-10-27 05:31:13,432 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-27 05:31:13,432 INFO L276 IsEmpty]: Start isEmpty. Operand 3003 states and 4255 transitions. [2020-10-27 05:31:13,439 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2020-10-27 05:31:13,439 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:31:13,439 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 05:31:13,439 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-27 05:31:13,440 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:31:13,440 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:31:13,440 INFO L82 PathProgramCache]: Analyzing trace with hash 1166200933, now seen corresponding path program 1 times [2020-10-27 05:31:13,440 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:31:13,441 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1021630382] [2020-10-27 05:31:13,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:31:13,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:31:13,575 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:31:13,685 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:31:13,759 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:31:13,988 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:31:14,841 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:31:15,820 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:31:16,621 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:31:17,044 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:31:18,533 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:31:18,533 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 118 [2020-10-27 05:31:18,533 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-27 05:31:18,533 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5010 [2020-10-27 05:31:18,533 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:31:18,534 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 05:31:18,534 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 05:31:18,534 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 70 [2020-10-27 05:31:18,534 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:31:22,598 WARN L193 SmtUtils]: Spent 3.89 s on a formula simplification that was a NOOP. DAG size: 799 [2020-10-27 05:31:22,601 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:31:22,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:31:22,645 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:31:22,729 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:31:22,729 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:31:22,730 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:31:22,730 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 100 [2020-10-27 05:31:22,730 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:31:22,730 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 05:31:22,730 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:31:22,730 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 05:31:22,730 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:31:22,788 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 05:31:22,788 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1021630382] [2020-10-27 05:31:22,788 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:31:22,788 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-27 05:31:22,789 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1553798464] [2020-10-27 05:31:22,789 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-27 05:31:22,789 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:31:22,790 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-27 05:31:22,790 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-27 05:31:22,790 INFO L87 Difference]: Start difference. First operand 3003 states and 4255 transitions. Second operand 6 states. [2020-10-27 05:31:27,039 WARN L193 SmtUtils]: Spent 4.11 s on a formula simplification that was a NOOP. DAG size: 805 [2020-10-27 05:31:37,872 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:31:37,872 INFO L93 Difference]: Finished difference Result 5854 states and 8351 transitions. [2020-10-27 05:31:37,873 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-27 05:31:37,873 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 110 [2020-10-27 05:31:37,874 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:31:37,887 INFO L225 Difference]: With dead ends: 5854 [2020-10-27 05:31:37,887 INFO L226 Difference]: Without dead ends: 2962 [2020-10-27 05:31:37,894 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 8.1s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2020-10-27 05:31:37,899 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2962 states. [2020-10-27 05:31:38,069 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2962 to 2962. [2020-10-27 05:31:38,069 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2962 states. [2020-10-27 05:31:38,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2962 states to 2962 states and 4202 transitions. [2020-10-27 05:31:38,075 INFO L78 Accepts]: Start accepts. Automaton has 2962 states and 4202 transitions. Word has length 110 [2020-10-27 05:31:38,076 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:31:38,076 INFO L481 AbstractCegarLoop]: Abstraction has 2962 states and 4202 transitions. [2020-10-27 05:31:38,076 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-27 05:31:38,076 INFO L276 IsEmpty]: Start isEmpty. Operand 2962 states and 4202 transitions. [2020-10-27 05:31:38,082 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2020-10-27 05:31:38,083 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:31:38,083 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 05:31:38,083 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-27 05:31:38,083 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:31:38,084 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:31:38,084 INFO L82 PathProgramCache]: Analyzing trace with hash 2027610427, now seen corresponding path program 1 times [2020-10-27 05:31:38,084 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:31:38,084 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1539177652] [2020-10-27 05:31:38,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:31:38,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:31:38,257 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:31:38,395 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:31:38,517 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:31:38,925 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:31:39,972 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:31:40,872 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:31:43,232 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:31:43,232 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 119 [2020-10-27 05:31:43,232 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-27 05:31:43,232 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5024 [2020-10-27 05:31:43,232 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:31:43,232 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 05:31:43,232 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 05:31:43,232 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 75 [2020-10-27 05:31:43,233 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:31:47,339 WARN L193 SmtUtils]: Spent 3.96 s on a formula simplification that was a NOOP. DAG size: 799 [2020-10-27 05:31:47,343 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:31:47,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:31:47,389 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:31:47,465 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:31:47,466 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:31:47,466 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:31:47,466 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 91 [2020-10-27 05:31:47,466 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:31:47,466 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 05:31:47,466 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:31:47,467 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 05:31:47,467 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:31:47,546 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 05:31:47,547 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1539177652] [2020-10-27 05:31:47,547 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:31:47,547 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-27 05:31:47,547 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [268128199] [2020-10-27 05:31:47,548 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-27 05:31:47,548 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:31:47,548 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-27 05:31:47,549 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-27 05:31:47,549 INFO L87 Difference]: Start difference. First operand 2962 states and 4202 transitions. Second operand 6 states. [2020-10-27 05:31:51,690 WARN L193 SmtUtils]: Spent 4.00 s on a formula simplification that was a NOOP. DAG size: 807 [2020-10-27 05:32:06,167 WARN L193 SmtUtils]: Spent 4.08 s on a formula simplification that was a NOOP. DAG size: 805 [2020-10-27 05:32:07,218 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:32:07,218 INFO L93 Difference]: Finished difference Result 7308 states and 10365 transitions. [2020-10-27 05:32:07,219 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-27 05:32:07,219 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 111 [2020-10-27 05:32:07,220 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:32:07,236 INFO L225 Difference]: With dead ends: 7308 [2020-10-27 05:32:07,236 INFO L226 Difference]: Without dead ends: 4441 [2020-10-27 05:32:07,243 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 12.1s TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2020-10-27 05:32:07,249 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4441 states. [2020-10-27 05:32:07,513 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4441 to 4359. [2020-10-27 05:32:07,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4359 states. [2020-10-27 05:32:07,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4359 states to 4359 states and 6167 transitions. [2020-10-27 05:32:07,525 INFO L78 Accepts]: Start accepts. Automaton has 4359 states and 6167 transitions. Word has length 111 [2020-10-27 05:32:07,526 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:32:07,526 INFO L481 AbstractCegarLoop]: Abstraction has 4359 states and 6167 transitions. [2020-10-27 05:32:07,526 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-27 05:32:07,526 INFO L276 IsEmpty]: Start isEmpty. Operand 4359 states and 6167 transitions. [2020-10-27 05:32:07,534 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2020-10-27 05:32:07,535 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:32:07,535 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 05:32:07,535 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-27 05:32:07,535 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:32:07,536 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:32:07,536 INFO L82 PathProgramCache]: Analyzing trace with hash 763561700, now seen corresponding path program 1 times [2020-10-27 05:32:07,536 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:32:07,536 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1218011922] [2020-10-27 05:32:07,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:32:07,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:32:07,669 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:32:07,932 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:32:08,066 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:32:08,691 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:32:10,462 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:32:10,646 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:32:11,101 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:32:12,614 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:32:12,615 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 120 [2020-10-27 05:32:12,615 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-27 05:32:12,615 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-27 05:32:12,615 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:32:12,615 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 05:32:12,615 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 05:32:12,615 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 73 [2020-10-27 05:32:12,615 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:32:16,638 WARN L193 SmtUtils]: Spent 3.88 s on a formula simplification that was a NOOP. DAG size: 799 [2020-10-27 05:32:16,640 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:32:16,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:32:16,684 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:32:16,727 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:32:16,727 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:32:16,727 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:32:16,727 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 57 [2020-10-27 05:32:16,728 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:32:16,728 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 05:32:16,728 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:32:16,728 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 05:32:16,728 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:32:16,788 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 05:32:16,788 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1218011922] [2020-10-27 05:32:16,789 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:32:16,789 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-27 05:32:16,789 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [882113411] [2020-10-27 05:32:16,789 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-27 05:32:16,789 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:32:16,790 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-27 05:32:16,790 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-10-27 05:32:16,790 INFO L87 Difference]: Start difference. First operand 4359 states and 6167 transitions. Second operand 6 states. [2020-10-27 05:32:20,963 WARN L193 SmtUtils]: Spent 4.02 s on a formula simplification that was a NOOP. DAG size: 808