./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/combinations/pals_lcr.5.1.ufo.UNBOUNDED.pals+Problem12_label01.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version f8e1c903 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d58943d-f269-402e-9d13-d515f5b26ace/bin/uautomizer-IVEQpCNsaX/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d58943d-f269-402e-9d13-d515f5b26ace/bin/uautomizer-IVEQpCNsaX/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d58943d-f269-402e-9d13-d515f5b26ace/bin/uautomizer-IVEQpCNsaX/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d58943d-f269-402e-9d13-d515f5b26ace/bin/uautomizer-IVEQpCNsaX/config/AutomizerReach.xml -i ../../sv-benchmarks/c/combinations/pals_lcr.5.1.ufo.UNBOUNDED.pals+Problem12_label01.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d58943d-f269-402e-9d13-d515f5b26ace/bin/uautomizer-IVEQpCNsaX/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d58943d-f269-402e-9d13-d515f5b26ace/bin/uautomizer-IVEQpCNsaX --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash eea9a40f3552bfebd5c1c4c3cede64309a12eae5f417ae31e397557429497ed5 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-f8e1c90 [2021-11-09 09:47:09,806 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-09 09:47:09,809 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-09 09:47:09,862 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-09 09:47:09,863 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-09 09:47:09,866 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-09 09:47:09,868 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-09 09:47:09,872 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-09 09:47:09,875 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-09 09:47:09,880 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-09 09:47:09,881 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-09 09:47:09,883 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-09 09:47:09,884 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-09 09:47:09,886 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-09 09:47:09,889 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-09 09:47:09,896 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-09 09:47:09,897 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-09 09:47:09,898 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-09 09:47:09,901 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-09 09:47:09,908 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-09 09:47:09,910 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-09 09:47:09,912 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-09 09:47:09,915 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-09 09:47:09,916 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-09 09:47:09,924 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-09 09:47:09,925 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-09 09:47:09,925 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-09 09:47:09,927 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-09 09:47:09,928 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-09 09:47:09,929 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-09 09:47:09,930 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-09 09:47:09,931 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-09 09:47:09,933 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-09 09:47:09,934 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-09 09:47:09,935 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-09 09:47:09,936 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-09 09:47:09,936 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-09 09:47:09,937 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-09 09:47:09,937 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-09 09:47:09,938 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-09 09:47:09,939 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-09 09:47:09,940 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d58943d-f269-402e-9d13-d515f5b26ace/bin/uautomizer-IVEQpCNsaX/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-11-09 09:47:09,981 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-09 09:47:09,981 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-09 09:47:09,982 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-09 09:47:09,982 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-09 09:47:09,983 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-09 09:47:09,983 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-09 09:47:09,984 INFO L138 SettingsManager]: * Use SBE=true [2021-11-09 09:47:09,984 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-09 09:47:09,984 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-09 09:47:09,984 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-09 09:47:09,985 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-09 09:47:09,986 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-09 09:47:09,986 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-09 09:47:09,986 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-09 09:47:09,986 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-09 09:47:09,986 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-09 09:47:09,987 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-09 09:47:09,987 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-09 09:47:09,987 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-09 09:47:09,987 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-09 09:47:09,987 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-09 09:47:09,988 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-09 09:47:09,988 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-09 09:47:09,988 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-09 09:47:09,988 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-09 09:47:09,989 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-09 09:47:09,989 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-11-09 09:47:09,989 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-09 09:47:09,989 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-11-09 09:47:09,991 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-11-09 09:47:09,991 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-09 09:47:09,991 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-09 09:47:09,992 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:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d58943d-f269-402e-9d13-d515f5b26ace/bin/uautomizer-IVEQpCNsaX/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d58943d-f269-402e-9d13-d515f5b26ace/bin/uautomizer-IVEQpCNsaX Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> eea9a40f3552bfebd5c1c4c3cede64309a12eae5f417ae31e397557429497ed5 [2021-11-09 09:47:10,290 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-09 09:47:10,316 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-09 09:47:10,319 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-09 09:47:10,321 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-09 09:47:10,321 INFO L275 PluginConnector]: CDTParser initialized [2021-11-09 09:47:10,322 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d58943d-f269-402e-9d13-d515f5b26ace/bin/uautomizer-IVEQpCNsaX/../../sv-benchmarks/c/combinations/pals_lcr.5.1.ufo.UNBOUNDED.pals+Problem12_label01.c [2021-11-09 09:47:10,402 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d58943d-f269-402e-9d13-d515f5b26ace/bin/uautomizer-IVEQpCNsaX/data/4fd27574f/93cf0d01877d4e4a8ad6a987d3bb8b83/FLAGc96574a87 [2021-11-09 09:47:11,221 INFO L306 CDTParser]: Found 1 translation units. [2021-11-09 09:47:11,222 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d58943d-f269-402e-9d13-d515f5b26ace/sv-benchmarks/c/combinations/pals_lcr.5.1.ufo.UNBOUNDED.pals+Problem12_label01.c [2021-11-09 09:47:11,258 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d58943d-f269-402e-9d13-d515f5b26ace/bin/uautomizer-IVEQpCNsaX/data/4fd27574f/93cf0d01877d4e4a8ad6a987d3bb8b83/FLAGc96574a87 [2021-11-09 09:47:11,733 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d58943d-f269-402e-9d13-d515f5b26ace/bin/uautomizer-IVEQpCNsaX/data/4fd27574f/93cf0d01877d4e4a8ad6a987d3bb8b83 [2021-11-09 09:47:11,736 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-09 09:47:11,737 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-09 09:47:11,739 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-09 09:47:11,739 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-09 09:47:11,755 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-09 09:47:11,756 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.11 09:47:11" (1/1) ... [2021-11-09 09:47:11,757 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@8d2366c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 09:47:11, skipping insertion in model container [2021-11-09 09:47:11,757 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.11 09:47:11" (1/1) ... [2021-11-09 09:47:11,764 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-09 09:47:11,922 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-09 09:47:12,422 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d58943d-f269-402e-9d13-d515f5b26ace/sv-benchmarks/c/combinations/pals_lcr.5.1.ufo.UNBOUNDED.pals+Problem12_label01.c[11795,11808] [2021-11-09 09:47:12,471 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d58943d-f269-402e-9d13-d515f5b26ace/sv-benchmarks/c/combinations/pals_lcr.5.1.ufo.UNBOUNDED.pals+Problem12_label01.c[17107,17120] [2021-11-09 09:47:13,358 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-09 09:47:13,369 INFO L203 MainTranslator]: Completed pre-run [2021-11-09 09:47:13,430 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d58943d-f269-402e-9d13-d515f5b26ace/sv-benchmarks/c/combinations/pals_lcr.5.1.ufo.UNBOUNDED.pals+Problem12_label01.c[11795,11808] [2021-11-09 09:47:13,438 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d58943d-f269-402e-9d13-d515f5b26ace/sv-benchmarks/c/combinations/pals_lcr.5.1.ufo.UNBOUNDED.pals+Problem12_label01.c[17107,17120] [2021-11-09 09:47:14,038 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-09 09:47:14,071 INFO L208 MainTranslator]: Completed translation [2021-11-09 09:47:14,071 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 09:47:14 WrapperNode [2021-11-09 09:47:14,072 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-09 09:47:14,073 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-09 09:47:14,073 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-09 09:47:14,074 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-09 09:47:14,081 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 09:47:14" (1/1) ... [2021-11-09 09:47:14,144 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 09:47:14" (1/1) ... [2021-11-09 09:47:14,597 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-09 09:47:14,598 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-09 09:47:14,599 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-09 09:47:14,599 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-09 09:47:14,607 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 09:47:14" (1/1) ... [2021-11-09 09:47:14,607 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 09:47:14" (1/1) ... [2021-11-09 09:47:14,652 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 09:47:14" (1/1) ... [2021-11-09 09:47:14,653 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 09:47:14" (1/1) ... [2021-11-09 09:47:14,885 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 09:47:14" (1/1) ... [2021-11-09 09:47:14,982 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 09:47:14" (1/1) ... [2021-11-09 09:47:15,040 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 09:47:14" (1/1) ... [2021-11-09 09:47:15,106 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-09 09:47:15,107 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-09 09:47:15,108 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-09 09:47:15,108 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-09 09:47:15,116 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 09:47:14" (1/1) ... [2021-11-09 09:47:15,137 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-09 09:47:15,148 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d58943d-f269-402e-9d13-d515f5b26ace/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:47:15,162 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d58943d-f269-402e-9d13-d515f5b26ace/bin/uautomizer-IVEQpCNsaX/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-09 09:47:15,205 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d58943d-f269-402e-9d13-d515f5b26ace/bin/uautomizer-IVEQpCNsaX/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-09 09:47:15,235 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-09 09:47:15,235 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-09 09:47:15,236 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-09 09:47:15,236 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-09 09:47:19,861 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-09 09:47:19,861 INFO L299 CfgBuilder]: Removed 36 assume(true) statements. [2021-11-09 09:47:19,866 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.11 09:47:19 BoogieIcfgContainer [2021-11-09 09:47:19,866 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-09 09:47:19,882 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-09 09:47:19,883 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-09 09:47:19,886 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-09 09:47:19,886 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.11 09:47:11" (1/3) ... [2021-11-09 09:47:19,887 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@b9bbd44 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.11 09:47:19, skipping insertion in model container [2021-11-09 09:47:19,887 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 09:47:14" (2/3) ... [2021-11-09 09:47:19,887 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@b9bbd44 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.11 09:47:19, skipping insertion in model container [2021-11-09 09:47:19,887 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.11 09:47:19" (3/3) ... [2021-11-09 09:47:19,888 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_lcr.5.1.ufo.UNBOUNDED.pals+Problem12_label01.c [2021-11-09 09:47:19,900 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-09 09:47:19,900 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2021-11-09 09:47:19,957 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-09 09:47:19,964 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-09 09:47:19,964 INFO L340 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-11-09 09:47:20,000 INFO L276 IsEmpty]: Start isEmpty. Operand has 910 states, 907 states have (on average 1.9007717750826902) internal successors, (1724), 909 states have internal predecessors, (1724), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:47:20,009 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-11-09 09:47:20,009 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:47:20,010 INFO L513 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] [2021-11-09 09:47:20,010 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 09:47:20,016 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:47:20,016 INFO L85 PathProgramCache]: Analyzing trace with hash -1083425478, now seen corresponding path program 1 times [2021-11-09 09:47:20,026 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:47:20,026 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1939760873] [2021-11-09 09:47:20,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:47:20,028 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:47:20,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:47:20,239 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:47:20,239 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:47:20,240 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1939760873] [2021-11-09 09:47:20,241 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1939760873] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 09:47:20,241 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 09:47:20,241 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-09 09:47:20,243 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [755294318] [2021-11-09 09:47:20,248 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-09 09:47:20,248 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:47:20,261 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-09 09:47:20,262 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-09 09:47:20,266 INFO L87 Difference]: Start difference. First operand has 910 states, 907 states have (on average 1.9007717750826902) internal successors, (1724), 909 states have internal predecessors, (1724), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 17.0) internal successors, (34), 2 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:47:20,339 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:47:20,339 INFO L93 Difference]: Finished difference Result 1781 states and 3376 transitions. [2021-11-09 09:47:20,340 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-09 09:47:20,341 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 17.0) internal successors, (34), 2 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-11-09 09:47:20,341 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:47:20,363 INFO L225 Difference]: With dead ends: 1781 [2021-11-09 09:47:20,364 INFO L226 Difference]: Without dead ends: 844 [2021-11-09 09:47:20,371 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-09 09:47:20,390 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 844 states. [2021-11-09 09:47:20,465 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 844 to 844. [2021-11-09 09:47:20,474 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 844 states, 842 states have (on average 1.8895486935866983) internal successors, (1591), 843 states have internal predecessors, (1591), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:47:20,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 844 states to 844 states and 1591 transitions. [2021-11-09 09:47:20,480 INFO L78 Accepts]: Start accepts. Automaton has 844 states and 1591 transitions. Word has length 34 [2021-11-09 09:47:20,481 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:47:20,481 INFO L470 AbstractCegarLoop]: Abstraction has 844 states and 1591 transitions. [2021-11-09 09:47:20,481 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 17.0) internal successors, (34), 2 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:47:20,482 INFO L276 IsEmpty]: Start isEmpty. Operand 844 states and 1591 transitions. [2021-11-09 09:47:20,488 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-11-09 09:47:20,488 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:47:20,489 INFO L513 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] [2021-11-09 09:47:20,489 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-09 09:47:20,489 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 09:47:20,492 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:47:20,493 INFO L85 PathProgramCache]: Analyzing trace with hash -1592898568, now seen corresponding path program 1 times [2021-11-09 09:47:20,493 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:47:20,493 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1364083176] [2021-11-09 09:47:20,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:47:20,494 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:47:20,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:47:20,657 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:47:20,658 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:47:20,658 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1364083176] [2021-11-09 09:47:20,658 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1364083176] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 09:47:20,659 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 09:47:20,659 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-09 09:47:20,659 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1370988340] [2021-11-09 09:47:20,660 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-09 09:47:20,661 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:47:20,662 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-09 09:47:20,662 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-09 09:47:20,662 INFO L87 Difference]: Start difference. First operand 844 states and 1591 transitions. Second operand has 5 states, 5 states have (on average 6.8) internal successors, (34), 5 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:47:20,767 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:47:20,768 INFO L93 Difference]: Finished difference Result 901 states and 1679 transitions. [2021-11-09 09:47:20,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-09 09:47:20,769 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 6.8) internal successors, (34), 5 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-11-09 09:47:20,769 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:47:20,775 INFO L225 Difference]: With dead ends: 901 [2021-11-09 09:47:20,775 INFO L226 Difference]: Without dead ends: 844 [2021-11-09 09:47:20,776 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-09 09:47:20,778 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 844 states. [2021-11-09 09:47:20,797 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 844 to 844. [2021-11-09 09:47:20,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 844 states, 842 states have (on average 1.852731591448931) internal successors, (1560), 843 states have internal predecessors, (1560), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:47:20,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 844 states to 844 states and 1560 transitions. [2021-11-09 09:47:20,805 INFO L78 Accepts]: Start accepts. Automaton has 844 states and 1560 transitions. Word has length 34 [2021-11-09 09:47:20,805 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:47:20,806 INFO L470 AbstractCegarLoop]: Abstraction has 844 states and 1560 transitions. [2021-11-09 09:47:20,806 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 6.8) internal successors, (34), 5 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:47:20,806 INFO L276 IsEmpty]: Start isEmpty. Operand 844 states and 1560 transitions. [2021-11-09 09:47:20,808 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-11-09 09:47:20,808 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:47:20,808 INFO L513 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] [2021-11-09 09:47:20,809 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-09 09:47:20,809 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 09:47:20,810 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:47:20,810 INFO L85 PathProgramCache]: Analyzing trace with hash 229544309, now seen corresponding path program 1 times [2021-11-09 09:47:20,810 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:47:20,811 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2146875432] [2021-11-09 09:47:20,811 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:47:20,811 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:47:20,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:47:20,941 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:47:20,942 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:47:20,942 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2146875432] [2021-11-09 09:47:20,942 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2146875432] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 09:47:20,943 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 09:47:20,943 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-09 09:47:20,943 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2007277753] [2021-11-09 09:47:20,944 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-09 09:47:20,944 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:47:20,945 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-09 09:47:20,945 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-09 09:47:20,945 INFO L87 Difference]: Start difference. First operand 844 states and 1560 transitions. Second operand has 4 states, 4 states have (on average 12.0) internal successors, (48), 3 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:47:28,369 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:47:28,369 INFO L93 Difference]: Finished difference Result 3099 states and 5869 transitions. [2021-11-09 09:47:28,369 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-09 09:47:28,369 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 12.0) internal successors, (48), 3 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2021-11-09 09:47:28,370 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:47:28,386 INFO L225 Difference]: With dead ends: 3099 [2021-11-09 09:47:28,387 INFO L226 Difference]: Without dead ends: 2346 [2021-11-09 09:47:28,388 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-09 09:47:28,393 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2346 states. [2021-11-09 09:47:28,442 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2346 to 2346. [2021-11-09 09:47:28,448 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2346 states, 2344 states have (on average 1.56740614334471) internal successors, (3674), 2345 states have internal predecessors, (3674), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:47:28,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2346 states to 2346 states and 3674 transitions. [2021-11-09 09:47:28,459 INFO L78 Accepts]: Start accepts. Automaton has 2346 states and 3674 transitions. Word has length 48 [2021-11-09 09:47:28,459 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:47:28,460 INFO L470 AbstractCegarLoop]: Abstraction has 2346 states and 3674 transitions. [2021-11-09 09:47:28,460 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 12.0) internal successors, (48), 3 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:47:28,460 INFO L276 IsEmpty]: Start isEmpty. Operand 2346 states and 3674 transitions. [2021-11-09 09:47:28,462 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2021-11-09 09:47:28,462 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:47:28,462 INFO L513 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] [2021-11-09 09:47:28,462 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-09 09:47:28,463 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 09:47:28,463 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:47:28,463 INFO L85 PathProgramCache]: Analyzing trace with hash -1337087153, now seen corresponding path program 1 times [2021-11-09 09:47:28,464 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:47:28,464 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1017573005] [2021-11-09 09:47:28,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:47:28,464 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:47:28,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:47:28,546 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:47:28,547 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:47:28,547 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1017573005] [2021-11-09 09:47:28,547 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1017573005] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 09:47:28,547 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 09:47:28,547 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-09 09:47:28,548 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [57207100] [2021-11-09 09:47:28,548 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-09 09:47:28,548 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:47:28,549 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-09 09:47:28,549 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-09 09:47:28,549 INFO L87 Difference]: Start difference. First operand 2346 states and 3674 transitions. Second operand has 3 states, 3 states have (on average 21.333333333333332) internal successors, (64), 3 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:47:28,600 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:47:28,600 INFO L93 Difference]: Finished difference Result 2446 states and 3832 transitions. [2021-11-09 09:47:28,600 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-09 09:47:28,601 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 21.333333333333332) internal successors, (64), 3 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 64 [2021-11-09 09:47:28,601 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:47:28,616 INFO L225 Difference]: With dead ends: 2446 [2021-11-09 09:47:28,616 INFO L226 Difference]: Without dead ends: 2393 [2021-11-09 09:47:28,617 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-09 09:47:28,621 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2393 states. [2021-11-09 09:47:28,671 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2393 to 2391. [2021-11-09 09:47:28,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2391 states, 2389 states have (on average 1.5680200920887402) internal successors, (3746), 2390 states have internal predecessors, (3746), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:47:28,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2391 states to 2391 states and 3746 transitions. [2021-11-09 09:47:28,687 INFO L78 Accepts]: Start accepts. Automaton has 2391 states and 3746 transitions. Word has length 64 [2021-11-09 09:47:28,688 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:47:28,688 INFO L470 AbstractCegarLoop]: Abstraction has 2391 states and 3746 transitions. [2021-11-09 09:47:28,688 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 21.333333333333332) internal successors, (64), 3 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:47:28,689 INFO L276 IsEmpty]: Start isEmpty. Operand 2391 states and 3746 transitions. [2021-11-09 09:47:28,689 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2021-11-09 09:47:28,690 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:47:28,690 INFO L513 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] [2021-11-09 09:47:28,690 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-09 09:47:28,690 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 09:47:28,691 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:47:28,691 INFO L85 PathProgramCache]: Analyzing trace with hash -119101755, now seen corresponding path program 1 times [2021-11-09 09:47:28,691 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:47:28,691 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1380747392] [2021-11-09 09:47:28,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:47:28,692 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:47:28,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:47:28,796 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:47:28,796 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:47:28,796 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1380747392] [2021-11-09 09:47:28,797 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1380747392] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 09:47:28,797 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 09:47:28,797 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-09 09:47:28,797 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1542132308] [2021-11-09 09:47:28,798 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-09 09:47:28,798 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:47:28,799 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-09 09:47:28,799 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-11-09 09:47:28,799 INFO L87 Difference]: Start difference. First operand 2391 states and 3746 transitions. Second operand has 7 states, 7 states have (on average 9.142857142857142) internal successors, (64), 7 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:47:29,038 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:47:29,038 INFO L93 Difference]: Finished difference Result 3371 states and 5306 transitions. [2021-11-09 09:47:29,039 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-09 09:47:29,039 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 9.142857142857142) internal successors, (64), 7 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 64 [2021-11-09 09:47:29,040 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:47:29,060 INFO L225 Difference]: With dead ends: 3371 [2021-11-09 09:47:29,060 INFO L226 Difference]: Without dead ends: 3273 [2021-11-09 09:47:29,062 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=63, Invalid=119, Unknown=0, NotChecked=0, Total=182 [2021-11-09 09:47:29,066 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3273 states. [2021-11-09 09:47:29,134 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3273 to 2487. [2021-11-09 09:47:29,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2487 states, 2485 states have (on average 1.5682092555331992) internal successors, (3897), 2486 states have internal predecessors, (3897), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:47:29,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2487 states to 2487 states and 3897 transitions. [2021-11-09 09:47:29,152 INFO L78 Accepts]: Start accepts. Automaton has 2487 states and 3897 transitions. Word has length 64 [2021-11-09 09:47:29,152 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:47:29,152 INFO L470 AbstractCegarLoop]: Abstraction has 2487 states and 3897 transitions. [2021-11-09 09:47:29,153 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.142857142857142) internal successors, (64), 7 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:47:29,153 INFO L276 IsEmpty]: Start isEmpty. Operand 2487 states and 3897 transitions. [2021-11-09 09:47:29,155 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-11-09 09:47:29,155 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:47:29,155 INFO L513 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] [2021-11-09 09:47:29,155 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-09 09:47:29,156 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 09:47:29,156 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:47:29,156 INFO L85 PathProgramCache]: Analyzing trace with hash 91634997, now seen corresponding path program 1 times [2021-11-09 09:47:29,157 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:47:29,157 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1930819261] [2021-11-09 09:47:29,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:47:29,157 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:47:29,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:47:29,238 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:47:29,238 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:47:29,239 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1930819261] [2021-11-09 09:47:29,239 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1930819261] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 09:47:29,239 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 09:47:29,239 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-09 09:47:29,240 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1274942130] [2021-11-09 09:47:29,240 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-09 09:47:29,240 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:47:29,241 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-09 09:47:29,241 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-09 09:47:29,241 INFO L87 Difference]: Start difference. First operand 2487 states and 3897 transitions. Second operand has 3 states, 3 states have (on average 22.0) internal successors, (66), 3 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:47:29,302 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:47:29,302 INFO L93 Difference]: Finished difference Result 2853 states and 4473 transitions. [2021-11-09 09:47:29,303 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-09 09:47:29,303 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 22.0) internal successors, (66), 3 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 66 [2021-11-09 09:47:29,304 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:47:29,320 INFO L225 Difference]: With dead ends: 2853 [2021-11-09 09:47:29,320 INFO L226 Difference]: Without dead ends: 2659 [2021-11-09 09:47:29,322 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-09 09:47:29,325 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2659 states. [2021-11-09 09:47:29,470 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2659 to 2653. [2021-11-09 09:47:29,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2653 states, 2651 states have (on average 1.5658242172764993) internal successors, (4151), 2652 states have internal predecessors, (4151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:47:29,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2653 states to 2653 states and 4151 transitions. [2021-11-09 09:47:29,487 INFO L78 Accepts]: Start accepts. Automaton has 2653 states and 4151 transitions. Word has length 66 [2021-11-09 09:47:29,487 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:47:29,487 INFO L470 AbstractCegarLoop]: Abstraction has 2653 states and 4151 transitions. [2021-11-09 09:47:29,488 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 22.0) internal successors, (66), 3 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:47:29,488 INFO L276 IsEmpty]: Start isEmpty. Operand 2653 states and 4151 transitions. [2021-11-09 09:47:29,489 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-11-09 09:47:29,489 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:47:29,489 INFO L513 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] [2021-11-09 09:47:29,489 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-11-09 09:47:29,490 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 09:47:29,490 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:47:29,490 INFO L85 PathProgramCache]: Analyzing trace with hash 158128509, now seen corresponding path program 1 times [2021-11-09 09:47:29,491 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:47:29,491 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [244014347] [2021-11-09 09:47:29,491 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:47:29,491 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:47:29,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:47:29,745 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:47:29,745 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:47:29,745 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [244014347] [2021-11-09 09:47:29,745 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [244014347] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 09:47:29,746 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 09:47:29,746 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-09 09:47:29,746 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [50301446] [2021-11-09 09:47:29,747 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-09 09:47:29,747 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:47:29,747 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-09 09:47:29,748 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-11-09 09:47:29,748 INFO L87 Difference]: Start difference. First operand 2653 states and 4151 transitions. Second operand has 7 states, 7 states have (on average 9.428571428571429) internal successors, (66), 7 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:47:29,972 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:47:29,972 INFO L93 Difference]: Finished difference Result 3015 states and 4713 transitions. [2021-11-09 09:47:29,972 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-09 09:47:29,973 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 9.428571428571429) internal successors, (66), 7 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 66 [2021-11-09 09:47:29,973 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:47:29,990 INFO L225 Difference]: With dead ends: 3015 [2021-11-09 09:47:29,990 INFO L226 Difference]: Without dead ends: 2655 [2021-11-09 09:47:29,992 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=54, Unknown=0, NotChecked=0, Total=90 [2021-11-09 09:47:29,995 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2655 states. [2021-11-09 09:47:30,062 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2655 to 2653. [2021-11-09 09:47:30,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2653 states, 2651 states have (on average 1.5643153526970954) internal successors, (4147), 2652 states have internal predecessors, (4147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:47:30,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2653 states to 2653 states and 4147 transitions. [2021-11-09 09:47:30,079 INFO L78 Accepts]: Start accepts. Automaton has 2653 states and 4147 transitions. Word has length 66 [2021-11-09 09:47:30,079 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:47:30,080 INFO L470 AbstractCegarLoop]: Abstraction has 2653 states and 4147 transitions. [2021-11-09 09:47:30,080 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.428571428571429) internal successors, (66), 7 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:47:30,080 INFO L276 IsEmpty]: Start isEmpty. Operand 2653 states and 4147 transitions. [2021-11-09 09:47:30,081 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-11-09 09:47:30,081 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:47:30,081 INFO L513 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] [2021-11-09 09:47:30,082 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-11-09 09:47:30,082 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 09:47:30,082 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:47:30,083 INFO L85 PathProgramCache]: Analyzing trace with hash -1100417095, now seen corresponding path program 1 times [2021-11-09 09:47:30,083 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:47:30,083 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [874095879] [2021-11-09 09:47:30,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:47:30,084 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:47:30,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:47:30,140 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:47:30,140 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:47:30,141 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [874095879] [2021-11-09 09:47:30,141 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [874095879] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 09:47:30,141 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 09:47:30,141 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-09 09:47:30,141 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2017717622] [2021-11-09 09:47:30,143 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-09 09:47:30,143 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:47:30,144 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-09 09:47:30,144 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-09 09:47:30,144 INFO L87 Difference]: Start difference. First operand 2653 states and 4147 transitions. Second operand has 3 states, 3 states have (on average 22.0) internal successors, (66), 3 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:47:30,225 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:47:30,225 INFO L93 Difference]: Finished difference Result 3325 states and 5181 transitions. [2021-11-09 09:47:30,226 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-09 09:47:30,226 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 22.0) internal successors, (66), 3 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 66 [2021-11-09 09:47:30,227 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:47:30,245 INFO L225 Difference]: With dead ends: 3325 [2021-11-09 09:47:30,245 INFO L226 Difference]: Without dead ends: 2965 [2021-11-09 09:47:30,247 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-09 09:47:30,251 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2965 states. [2021-11-09 09:47:30,348 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2965 to 2963. [2021-11-09 09:47:30,355 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2963 states, 2961 states have (on average 1.5585950692333672) internal successors, (4615), 2962 states have internal predecessors, (4615), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:47:30,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2963 states to 2963 states and 4615 transitions. [2021-11-09 09:47:30,366 INFO L78 Accepts]: Start accepts. Automaton has 2963 states and 4615 transitions. Word has length 66 [2021-11-09 09:47:30,366 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:47:30,366 INFO L470 AbstractCegarLoop]: Abstraction has 2963 states and 4615 transitions. [2021-11-09 09:47:30,367 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 22.0) internal successors, (66), 3 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:47:30,367 INFO L276 IsEmpty]: Start isEmpty. Operand 2963 states and 4615 transitions. [2021-11-09 09:47:30,368 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-11-09 09:47:30,368 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:47:30,368 INFO L513 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] [2021-11-09 09:47:30,368 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-11-09 09:47:30,369 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 09:47:30,369 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:47:30,369 INFO L85 PathProgramCache]: Analyzing trace with hash -826729383, now seen corresponding path program 1 times [2021-11-09 09:47:30,369 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:47:30,370 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1111779461] [2021-11-09 09:47:30,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:47:30,370 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:47:30,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:47:30,423 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:47:30,423 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:47:30,424 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1111779461] [2021-11-09 09:47:30,424 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1111779461] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 09:47:30,424 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 09:47:30,424 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-09 09:47:30,424 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1848207799] [2021-11-09 09:47:30,425 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-09 09:47:30,425 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:47:30,426 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-09 09:47:30,429 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-09 09:47:30,430 INFO L87 Difference]: Start difference. First operand 2963 states and 4615 transitions. Second operand has 3 states, 3 states have (on average 22.0) internal successors, (66), 3 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:47:30,540 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:47:30,540 INFO L93 Difference]: Finished difference Result 4207 states and 6505 transitions. [2021-11-09 09:47:30,541 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-09 09:47:30,541 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 22.0) internal successors, (66), 3 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 66 [2021-11-09 09:47:30,542 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:47:30,563 INFO L225 Difference]: With dead ends: 4207 [2021-11-09 09:47:30,563 INFO L226 Difference]: Without dead ends: 3537 [2021-11-09 09:47:30,566 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-09 09:47:30,572 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3537 states. [2021-11-09 09:47:30,701 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3537 to 3535. [2021-11-09 09:47:30,710 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3535 states, 3533 states have (on average 1.5462779507500708) internal successors, (5463), 3534 states have internal predecessors, (5463), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:47:30,724 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3535 states to 3535 states and 5463 transitions. [2021-11-09 09:47:30,724 INFO L78 Accepts]: Start accepts. Automaton has 3535 states and 5463 transitions. Word has length 66 [2021-11-09 09:47:30,724 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:47:30,725 INFO L470 AbstractCegarLoop]: Abstraction has 3535 states and 5463 transitions. [2021-11-09 09:47:30,725 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 22.0) internal successors, (66), 3 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:47:30,725 INFO L276 IsEmpty]: Start isEmpty. Operand 3535 states and 5463 transitions. [2021-11-09 09:47:30,729 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-11-09 09:47:30,730 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:47:30,730 INFO L513 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] [2021-11-09 09:47:30,730 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-11-09 09:47:30,732 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 09:47:30,732 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:47:30,732 INFO L85 PathProgramCache]: Analyzing trace with hash 992342265, now seen corresponding path program 1 times [2021-11-09 09:47:30,732 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:47:30,733 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [878615266] [2021-11-09 09:47:30,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:47:30,733 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:47:30,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:47:30,791 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:47:30,791 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:47:30,792 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [878615266] [2021-11-09 09:47:30,792 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [878615266] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 09:47:30,792 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 09:47:30,794 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-09 09:47:30,794 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [691077880] [2021-11-09 09:47:30,795 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-09 09:47:30,795 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:47:30,796 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-09 09:47:30,796 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-09 09:47:30,796 INFO L87 Difference]: Start difference. First operand 3535 states and 5463 transitions. Second operand has 3 states, 3 states have (on average 22.0) internal successors, (66), 3 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:47:31,053 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:47:31,054 INFO L93 Difference]: Finished difference Result 5827 states and 8889 transitions. [2021-11-09 09:47:31,054 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-09 09:47:31,055 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 22.0) internal successors, (66), 3 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 66 [2021-11-09 09:47:31,055 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:47:31,080 INFO L225 Difference]: With dead ends: 5827 [2021-11-09 09:47:31,081 INFO L226 Difference]: Without dead ends: 4585 [2021-11-09 09:47:31,083 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-09 09:47:31,089 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4585 states. [2021-11-09 09:47:31,339 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4585 to 4583. [2021-11-09 09:47:31,360 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4583 states, 4581 states have (on average 1.5243396638288584) internal successors, (6983), 4582 states have internal predecessors, (6983), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:47:31,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4583 states to 4583 states and 6983 transitions. [2021-11-09 09:47:31,389 INFO L78 Accepts]: Start accepts. Automaton has 4583 states and 6983 transitions. Word has length 66 [2021-11-09 09:47:31,389 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:47:31,389 INFO L470 AbstractCegarLoop]: Abstraction has 4583 states and 6983 transitions. [2021-11-09 09:47:31,390 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 22.0) internal successors, (66), 3 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:47:31,391 INFO L276 IsEmpty]: Start isEmpty. Operand 4583 states and 6983 transitions. [2021-11-09 09:47:31,394 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-11-09 09:47:31,394 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:47:31,394 INFO L513 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] [2021-11-09 09:47:31,395 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-11-09 09:47:31,395 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 09:47:31,395 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:47:31,396 INFO L85 PathProgramCache]: Analyzing trace with hash 192293446, now seen corresponding path program 1 times [2021-11-09 09:47:31,396 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:47:31,398 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [769597568] [2021-11-09 09:47:31,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:47:31,398 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:47:31,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:47:31,535 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:47:31,536 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:47:31,536 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [769597568] [2021-11-09 09:47:31,536 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [769597568] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 09:47:31,537 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 09:47:31,537 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-11-09 09:47:31,537 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [308372011] [2021-11-09 09:47:31,537 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-09 09:47:31,538 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:47:31,544 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-09 09:47:31,544 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-11-09 09:47:31,544 INFO L87 Difference]: Start difference. First operand 4583 states and 6983 transitions. Second operand has 8 states, 8 states have (on average 8.375) internal successors, (67), 8 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:47:32,076 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:47:32,076 INFO L93 Difference]: Finished difference Result 6309 states and 9485 transitions. [2021-11-09 09:47:32,077 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-09 09:47:32,077 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 8.375) internal successors, (67), 8 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 67 [2021-11-09 09:47:32,078 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:47:32,095 INFO L225 Difference]: With dead ends: 6309 [2021-11-09 09:47:32,095 INFO L226 Difference]: Without dead ends: 6307 [2021-11-09 09:47:32,099 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=74, Invalid=136, Unknown=0, NotChecked=0, Total=210 [2021-11-09 09:47:32,107 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6307 states. [2021-11-09 09:47:32,417 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6307 to 4679. [2021-11-09 09:47:32,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4679 states, 4677 states have (on average 1.5101560829591618) internal successors, (7063), 4678 states have internal predecessors, (7063), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:47:32,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4679 states to 4679 states and 7063 transitions. [2021-11-09 09:47:32,439 INFO L78 Accepts]: Start accepts. Automaton has 4679 states and 7063 transitions. Word has length 67 [2021-11-09 09:47:32,439 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:47:32,439 INFO L470 AbstractCegarLoop]: Abstraction has 4679 states and 7063 transitions. [2021-11-09 09:47:32,439 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.375) internal successors, (67), 8 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:47:32,439 INFO L276 IsEmpty]: Start isEmpty. Operand 4679 states and 7063 transitions. [2021-11-09 09:47:32,440 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-11-09 09:47:32,440 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:47:32,441 INFO L513 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] [2021-11-09 09:47:32,441 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-11-09 09:47:32,441 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 09:47:32,442 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:47:32,442 INFO L85 PathProgramCache]: Analyzing trace with hash -1338319212, now seen corresponding path program 1 times [2021-11-09 09:47:32,442 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:47:32,442 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [107751415] [2021-11-09 09:47:32,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:47:32,443 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:47:32,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:47:32,485 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:47:32,486 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:47:32,490 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [107751415] [2021-11-09 09:47:32,491 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [107751415] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 09:47:32,491 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 09:47:32,491 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-09 09:47:32,491 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1095858462] [2021-11-09 09:47:32,491 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-09 09:47:32,492 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:47:32,492 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-09 09:47:32,492 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-09 09:47:32,492 INFO L87 Difference]: Start difference. First operand 4679 states and 7063 transitions. Second operand has 3 states, 3 states have (on average 22.666666666666668) internal successors, (68), 3 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:47:32,888 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:47:32,888 INFO L93 Difference]: Finished difference Result 7118 states and 10653 transitions. [2021-11-09 09:47:32,889 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-09 09:47:32,889 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 22.666666666666668) internal successors, (68), 3 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 68 [2021-11-09 09:47:32,889 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:47:32,903 INFO L225 Difference]: With dead ends: 7118 [2021-11-09 09:47:32,903 INFO L226 Difference]: Without dead ends: 5771 [2021-11-09 09:47:32,906 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-09 09:47:32,912 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5771 states. [2021-11-09 09:47:33,257 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5771 to 5769. [2021-11-09 09:47:33,266 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5769 states, 5767 states have (on average 1.4941910872203918) internal successors, (8617), 5768 states have internal predecessors, (8617), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:47:33,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5769 states to 5769 states and 8617 transitions. [2021-11-09 09:47:33,281 INFO L78 Accepts]: Start accepts. Automaton has 5769 states and 8617 transitions. Word has length 68 [2021-11-09 09:47:33,281 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:47:33,281 INFO L470 AbstractCegarLoop]: Abstraction has 5769 states and 8617 transitions. [2021-11-09 09:47:33,281 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 22.666666666666668) internal successors, (68), 3 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:47:33,282 INFO L276 IsEmpty]: Start isEmpty. Operand 5769 states and 8617 transitions. [2021-11-09 09:47:33,285 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2021-11-09 09:47:33,285 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:47:33,286 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2021-11-09 09:47:33,286 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-11-09 09:47:33,286 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 09:47:33,286 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:47:33,287 INFO L85 PathProgramCache]: Analyzing trace with hash 320828100, now seen corresponding path program 1 times [2021-11-09 09:47:33,287 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:47:33,287 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [73877005] [2021-11-09 09:47:33,287 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:47:33,287 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:47:33,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:47:33,373 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-11-09 09:47:33,373 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:47:33,373 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [73877005] [2021-11-09 09:47:33,373 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [73877005] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 09:47:33,374 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 09:47:33,374 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-09 09:47:33,374 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [979381507] [2021-11-09 09:47:33,374 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-09 09:47:33,375 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:47:33,375 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-09 09:47:33,375 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-11-09 09:47:33,376 INFO L87 Difference]: Start difference. First operand 5769 states and 8617 transitions. Second operand has 7 states, 7 states have (on average 11.0) internal successors, (77), 7 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:47:34,877 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:47:34,877 INFO L93 Difference]: Finished difference Result 23845 states and 34719 transitions. [2021-11-09 09:47:34,877 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-09 09:47:34,878 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 11.0) internal successors, (77), 7 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 94 [2021-11-09 09:47:34,878 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:47:34,923 INFO L225 Difference]: With dead ends: 23845 [2021-11-09 09:47:34,923 INFO L226 Difference]: Without dead ends: 20371 [2021-11-09 09:47:34,933 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-11-09 09:47:34,957 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20371 states. [2021-11-09 09:47:35,761 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20371 to 9241. [2021-11-09 09:47:35,773 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9241 states, 9239 states have (on average 1.4712631237146878) internal successors, (13593), 9240 states have internal predecessors, (13593), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:47:35,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9241 states to 9241 states and 13593 transitions. [2021-11-09 09:47:35,790 INFO L78 Accepts]: Start accepts. Automaton has 9241 states and 13593 transitions. Word has length 94 [2021-11-09 09:47:35,791 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:47:35,791 INFO L470 AbstractCegarLoop]: Abstraction has 9241 states and 13593 transitions. [2021-11-09 09:47:35,791 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.0) internal successors, (77), 7 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:47:35,791 INFO L276 IsEmpty]: Start isEmpty. Operand 9241 states and 13593 transitions. [2021-11-09 09:47:35,795 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2021-11-09 09:47:35,795 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:47:35,795 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2021-11-09 09:47:35,795 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-11-09 09:47:35,796 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 09:47:35,796 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:47:35,796 INFO L85 PathProgramCache]: Analyzing trace with hash 350350318, now seen corresponding path program 1 times [2021-11-09 09:47:35,796 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:47:35,797 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [441660935] [2021-11-09 09:47:35,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:47:35,797 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:47:35,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:47:35,898 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-11-09 09:47:35,898 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:47:35,898 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [441660935] [2021-11-09 09:47:35,899 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [441660935] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 09:47:35,899 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 09:47:35,899 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-09 09:47:35,899 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [115141479] [2021-11-09 09:47:35,900 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-09 09:47:35,900 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:47:35,900 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-09 09:47:35,901 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-11-09 09:47:35,901 INFO L87 Difference]: Start difference. First operand 9241 states and 13593 transitions. Second operand has 7 states, 7 states have (on average 11.571428571428571) internal successors, (81), 7 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:47:37,471 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:47:37,471 INFO L93 Difference]: Finished difference Result 27317 states and 39695 transitions. [2021-11-09 09:47:37,472 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-09 09:47:37,472 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 11.571428571428571) internal successors, (81), 7 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 94 [2021-11-09 09:47:37,472 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:47:37,529 INFO L225 Difference]: With dead ends: 27317 [2021-11-09 09:47:37,529 INFO L226 Difference]: Without dead ends: 23843 [2021-11-09 09:47:37,548 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-11-09 09:47:37,569 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23843 states. [2021-11-09 09:47:38,662 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23843 to 14457. [2021-11-09 09:47:38,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14457 states, 14455 states have (on average 1.4539605672777585) internal successors, (21017), 14456 states have internal predecessors, (21017), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:47:38,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14457 states to 14457 states and 21017 transitions. [2021-11-09 09:47:38,707 INFO L78 Accepts]: Start accepts. Automaton has 14457 states and 21017 transitions. Word has length 94 [2021-11-09 09:47:38,707 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:47:38,708 INFO L470 AbstractCegarLoop]: Abstraction has 14457 states and 21017 transitions. [2021-11-09 09:47:38,708 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.571428571428571) internal successors, (81), 7 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:47:38,708 INFO L276 IsEmpty]: Start isEmpty. Operand 14457 states and 21017 transitions. [2021-11-09 09:47:38,712 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2021-11-09 09:47:38,712 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:47:38,712 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2021-11-09 09:47:38,713 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-11-09 09:47:38,713 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 09:47:38,713 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:47:38,714 INFO L85 PathProgramCache]: Analyzing trace with hash 624038030, now seen corresponding path program 1 times [2021-11-09 09:47:38,714 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:47:38,714 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [393856879] [2021-11-09 09:47:38,714 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:47:38,715 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:47:38,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:47:38,812 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-09 09:47:38,813 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:47:38,813 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [393856879] [2021-11-09 09:47:38,813 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [393856879] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 09:47:38,813 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 09:47:38,813 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-09 09:47:38,814 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1540614651] [2021-11-09 09:47:38,814 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-09 09:47:38,814 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:47:38,815 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-09 09:47:38,815 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-11-09 09:47:38,815 INFO L87 Difference]: Start difference. First operand 14457 states and 21017 transitions. Second operand has 7 states, 7 states have (on average 12.142857142857142) internal successors, (85), 7 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:47:40,170 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:47:40,171 INFO L93 Difference]: Finished difference Result 30789 states and 44671 transitions. [2021-11-09 09:47:40,171 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-09 09:47:40,172 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 12.142857142857142) internal successors, (85), 7 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 94 [2021-11-09 09:47:40,172 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:47:40,231 INFO L225 Difference]: With dead ends: 30789 [2021-11-09 09:47:40,232 INFO L226 Difference]: Without dead ends: 27315 [2021-11-09 09:47:40,243 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-11-09 09:47:40,265 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27315 states. [2021-11-09 09:47:41,375 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27315 to 17929. [2021-11-09 09:47:41,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17929 states, 17927 states have (on average 1.4499358509510794) internal successors, (25993), 17928 states have internal predecessors, (25993), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:47:41,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17929 states to 17929 states and 25993 transitions. [2021-11-09 09:47:41,425 INFO L78 Accepts]: Start accepts. Automaton has 17929 states and 25993 transitions. Word has length 94 [2021-11-09 09:47:41,425 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:47:41,425 INFO L470 AbstractCegarLoop]: Abstraction has 17929 states and 25993 transitions. [2021-11-09 09:47:41,425 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 12.142857142857142) internal successors, (85), 7 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:47:41,426 INFO L276 IsEmpty]: Start isEmpty. Operand 17929 states and 25993 transitions. [2021-11-09 09:47:41,430 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2021-11-09 09:47:41,430 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:47:41,430 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2021-11-09 09:47:41,431 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-11-09 09:47:41,431 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 09:47:41,431 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:47:41,431 INFO L85 PathProgramCache]: Analyzing trace with hash -1851857618, now seen corresponding path program 1 times [2021-11-09 09:47:41,432 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:47:41,432 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [133766808] [2021-11-09 09:47:41,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:47:41,432 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:47:41,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:47:41,521 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-09 09:47:41,521 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:47:41,521 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [133766808] [2021-11-09 09:47:41,522 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [133766808] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 09:47:41,522 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 09:47:41,522 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-09 09:47:41,522 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [408262223] [2021-11-09 09:47:41,523 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-09 09:47:41,523 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:47:41,523 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-09 09:47:41,523 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-11-09 09:47:41,524 INFO L87 Difference]: Start difference. First operand 17929 states and 25993 transitions. Second operand has 7 states, 7 states have (on average 12.714285714285714) internal successors, (89), 7 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:47:43,556 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:47:43,557 INFO L93 Difference]: Finished difference Result 34261 states and 49647 transitions. [2021-11-09 09:47:43,557 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-09 09:47:43,558 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 12.714285714285714) internal successors, (89), 7 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 94 [2021-11-09 09:47:43,558 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:47:43,617 INFO L225 Difference]: With dead ends: 34261 [2021-11-09 09:47:43,617 INFO L226 Difference]: Without dead ends: 30787 [2021-11-09 09:47:43,629 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-11-09 09:47:43,657 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30787 states. [2021-11-09 09:47:44,962 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30787 to 21401. [2021-11-09 09:47:44,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21401 states, 21399 states have (on average 1.447217159680359) internal successors, (30969), 21400 states have internal predecessors, (30969), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:47:45,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21401 states to 21401 states and 30969 transitions. [2021-11-09 09:47:45,015 INFO L78 Accepts]: Start accepts. Automaton has 21401 states and 30969 transitions. Word has length 94 [2021-11-09 09:47:45,015 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:47:45,016 INFO L470 AbstractCegarLoop]: Abstraction has 21401 states and 30969 transitions. [2021-11-09 09:47:45,016 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 12.714285714285714) internal successors, (89), 7 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:47:45,016 INFO L276 IsEmpty]: Start isEmpty. Operand 21401 states and 30969 transitions. [2021-11-09 09:47:45,022 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2021-11-09 09:47:45,022 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:47:45,022 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2021-11-09 09:47:45,023 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-11-09 09:47:45,023 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 09:47:45,023 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:47:45,024 INFO L85 PathProgramCache]: Analyzing trace with hash 2023924156, now seen corresponding path program 1 times [2021-11-09 09:47:45,024 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:47:45,024 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2067797616] [2021-11-09 09:47:45,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:47:45,024 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:47:45,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:47:45,086 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 25 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:47:45,086 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:47:45,086 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2067797616] [2021-11-09 09:47:45,087 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2067797616] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 09:47:45,087 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 09:47:45,087 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-09 09:47:45,087 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [956112356] [2021-11-09 09:47:45,088 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-09 09:47:45,088 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:47:45,088 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-09 09:47:45,088 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-09 09:47:45,089 INFO L87 Difference]: Start difference. First operand 21401 states and 30969 transitions. Second operand has 3 states, 3 states have (on average 32.0) internal successors, (96), 3 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:47:45,948 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:47:45,948 INFO L93 Difference]: Finished difference Result 34810 states and 50366 transitions. [2021-11-09 09:47:45,948 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-09 09:47:45,949 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 32.0) internal successors, (96), 3 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 96 [2021-11-09 09:47:45,949 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:47:45,984 INFO L225 Difference]: With dead ends: 34810 [2021-11-09 09:47:45,984 INFO L226 Difference]: Without dead ends: 15704 [2021-11-09 09:47:46,006 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-09 09:47:46,019 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15704 states. [2021-11-09 09:47:46,834 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15704 to 15702. [2021-11-09 09:47:46,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15702 states, 15700 states have (on average 1.4529299363057324) internal successors, (22811), 15701 states have internal predecessors, (22811), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:47:46,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15702 states to 15702 states and 22811 transitions. [2021-11-09 09:47:46,876 INFO L78 Accepts]: Start accepts. Automaton has 15702 states and 22811 transitions. Word has length 96 [2021-11-09 09:47:46,876 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:47:46,876 INFO L470 AbstractCegarLoop]: Abstraction has 15702 states and 22811 transitions. [2021-11-09 09:47:46,877 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 32.0) internal successors, (96), 3 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:47:46,877 INFO L276 IsEmpty]: Start isEmpty. Operand 15702 states and 22811 transitions. [2021-11-09 09:47:46,880 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2021-11-09 09:47:46,881 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:47:46,881 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2021-11-09 09:47:46,881 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-11-09 09:47:46,882 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 09:47:46,882 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:47:46,882 INFO L85 PathProgramCache]: Analyzing trace with hash -1980328951, now seen corresponding path program 1 times [2021-11-09 09:47:46,882 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:47:46,883 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1986247518] [2021-11-09 09:47:46,883 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:47:46,883 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:47:46,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:47:46,976 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 19 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-09 09:47:46,976 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:47:46,976 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1986247518] [2021-11-09 09:47:46,976 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1986247518] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 09:47:46,977 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 09:47:46,977 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-09 09:47:46,977 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1121729463] [2021-11-09 09:47:46,977 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-09 09:47:46,978 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:47:46,978 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-09 09:47:46,978 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-11-09 09:47:46,979 INFO L87 Difference]: Start difference. First operand 15702 states and 22811 transitions. Second operand has 7 states, 7 states have (on average 13.571428571428571) internal successors, (95), 7 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:47:48,687 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:47:48,687 INFO L93 Difference]: Finished difference Result 27874 states and 40417 transitions. [2021-11-09 09:47:48,691 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-09 09:47:48,691 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 13.571428571428571) internal successors, (95), 7 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 96 [2021-11-09 09:47:48,691 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:47:48,726 INFO L225 Difference]: With dead ends: 27874 [2021-11-09 09:47:48,726 INFO L226 Difference]: Without dead ends: 25440 [2021-11-09 09:47:48,738 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-11-09 09:47:48,760 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25440 states. [2021-11-09 09:47:50,143 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25440 to 18134. [2021-11-09 09:47:50,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18134 states, 18132 states have (on average 1.450419148466799) internal successors, (26299), 18133 states have internal predecessors, (26299), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:47:50,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18134 states to 18134 states and 26299 transitions. [2021-11-09 09:47:50,186 INFO L78 Accepts]: Start accepts. Automaton has 18134 states and 26299 transitions. Word has length 96 [2021-11-09 09:47:50,186 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:47:50,186 INFO L470 AbstractCegarLoop]: Abstraction has 18134 states and 26299 transitions. [2021-11-09 09:47:50,186 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 13.571428571428571) internal successors, (95), 7 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:47:50,186 INFO L276 IsEmpty]: Start isEmpty. Operand 18134 states and 26299 transitions. [2021-11-09 09:47:50,190 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2021-11-09 09:47:50,191 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:47:50,191 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2021-11-09 09:47:50,191 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-11-09 09:47:50,191 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 09:47:50,192 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:47:50,192 INFO L85 PathProgramCache]: Analyzing trace with hash 28168523, now seen corresponding path program 1 times [2021-11-09 09:47:50,192 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:47:50,192 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1187478708] [2021-11-09 09:47:50,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:47:50,193 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:47:50,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:47:50,250 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 23 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:47:50,250 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:47:50,251 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1187478708] [2021-11-09 09:47:50,251 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1187478708] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 09:47:50,251 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 09:47:50,251 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-09 09:47:50,252 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2138123515] [2021-11-09 09:47:50,252 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-09 09:47:50,252 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:47:50,253 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-09 09:47:50,253 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-09 09:47:50,253 INFO L87 Difference]: Start difference. First operand 18134 states and 26299 transitions. Second operand has 3 states, 3 states have (on average 32.333333333333336) internal successors, (97), 3 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:47:50,959 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:47:50,959 INFO L93 Difference]: Finished difference Result 26042 states and 37637 transitions. [2021-11-09 09:47:50,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-09 09:47:50,960 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 32.333333333333336) internal successors, (97), 3 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 97 [2021-11-09 09:47:50,960 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:47:50,969 INFO L225 Difference]: With dead ends: 26042 [2021-11-09 09:47:50,969 INFO L226 Difference]: Without dead ends: 10232 [2021-11-09 09:47:50,978 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-09 09:47:50,984 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10232 states. [2021-11-09 09:47:51,459 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10232 to 10230. [2021-11-09 09:47:51,467 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10230 states, 10228 states have (on average 1.4527766914352758) internal successors, (14859), 10229 states have internal predecessors, (14859), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:47:51,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10230 states to 10230 states and 14859 transitions. [2021-11-09 09:47:51,479 INFO L78 Accepts]: Start accepts. Automaton has 10230 states and 14859 transitions. Word has length 97 [2021-11-09 09:47:51,479 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:47:51,479 INFO L470 AbstractCegarLoop]: Abstraction has 10230 states and 14859 transitions. [2021-11-09 09:47:51,480 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 32.333333333333336) internal successors, (97), 3 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:47:51,480 INFO L276 IsEmpty]: Start isEmpty. Operand 10230 states and 14859 transitions. [2021-11-09 09:47:51,483 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2021-11-09 09:47:51,483 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:47:51,483 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 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] [2021-11-09 09:47:51,484 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2021-11-09 09:47:51,484 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 09:47:51,484 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:47:51,484 INFO L85 PathProgramCache]: Analyzing trace with hash -1887443071, now seen corresponding path program 1 times [2021-11-09 09:47:51,485 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:47:51,485 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [464556541] [2021-11-09 09:47:51,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:47:51,485 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:47:51,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:47:51,532 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 21 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:47:51,533 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:47:51,533 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [464556541] [2021-11-09 09:47:51,533 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [464556541] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 09:47:51,533 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 09:47:51,534 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-09 09:47:51,534 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [744720214] [2021-11-09 09:47:51,534 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-09 09:47:51,534 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:47:51,535 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-09 09:47:51,535 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-09 09:47:51,535 INFO L87 Difference]: Start difference. First operand 10230 states and 14859 transitions. Second operand has 3 states, 3 states have (on average 32.333333333333336) internal successors, (97), 3 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:47:51,930 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:47:51,930 INFO L93 Difference]: Finished difference Result 14186 states and 20477 transitions. [2021-11-09 09:47:51,931 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-09 09:47:51,931 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 32.333333333333336) internal successors, (97), 3 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 97 [2021-11-09 09:47:51,931 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:47:51,940 INFO L225 Difference]: With dead ends: 14186 [2021-11-09 09:47:51,940 INFO L226 Difference]: Without dead ends: 6280 [2021-11-09 09:47:51,950 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-09 09:47:51,955 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6280 states. [2021-11-09 09:47:52,314 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6280 to 6278. [2021-11-09 09:47:52,318 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6278 states, 6276 states have (on average 1.4644678138942002) internal successors, (9191), 6277 states have internal predecessors, (9191), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:47:52,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6278 states to 6278 states and 9191 transitions. [2021-11-09 09:47:52,326 INFO L78 Accepts]: Start accepts. Automaton has 6278 states and 9191 transitions. Word has length 97 [2021-11-09 09:47:52,326 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:47:52,327 INFO L470 AbstractCegarLoop]: Abstraction has 6278 states and 9191 transitions. [2021-11-09 09:47:52,327 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 32.333333333333336) internal successors, (97), 3 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:47:52,327 INFO L276 IsEmpty]: Start isEmpty. Operand 6278 states and 9191 transitions. [2021-11-09 09:47:52,329 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2021-11-09 09:47:52,329 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:47:52,330 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 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] [2021-11-09 09:47:52,330 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2021-11-09 09:47:52,330 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 09:47:52,330 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:47:52,331 INFO L85 PathProgramCache]: Analyzing trace with hash -300840777, now seen corresponding path program 1 times [2021-11-09 09:47:52,331 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:47:52,331 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1446851872] [2021-11-09 09:47:52,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:47:52,332 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:47:52,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:47:52,380 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 19 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:47:52,380 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:47:52,380 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1446851872] [2021-11-09 09:47:52,381 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1446851872] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 09:47:52,381 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 09:47:52,381 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-09 09:47:52,381 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1058003197] [2021-11-09 09:47:52,382 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-09 09:47:52,382 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:47:52,382 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-09 09:47:52,382 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-09 09:47:52,383 INFO L87 Difference]: Start difference. First operand 6278 states and 9191 transitions. Second operand has 3 states, 3 states have (on average 32.333333333333336) internal successors, (97), 3 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:47:52,545 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:47:52,545 INFO L93 Difference]: Finished difference Result 8258 states and 11975 transitions. [2021-11-09 09:47:52,546 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-09 09:47:52,546 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 32.333333333333336) internal successors, (97), 3 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 97 [2021-11-09 09:47:52,546 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:47:52,552 INFO L225 Difference]: With dead ends: 8258 [2021-11-09 09:47:52,552 INFO L226 Difference]: Without dead ends: 4304 [2021-11-09 09:47:52,555 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-09 09:47:52,557 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4304 states. [2021-11-09 09:47:52,698 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4304 to 4302. [2021-11-09 09:47:52,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4302 states, 4300 states have (on average 1.4844186046511627) internal successors, (6383), 4301 states have internal predecessors, (6383), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:47:52,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4302 states to 4302 states and 6383 transitions. [2021-11-09 09:47:52,710 INFO L78 Accepts]: Start accepts. Automaton has 4302 states and 6383 transitions. Word has length 97 [2021-11-09 09:47:52,710 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:47:52,711 INFO L470 AbstractCegarLoop]: Abstraction has 4302 states and 6383 transitions. [2021-11-09 09:47:52,711 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 32.333333333333336) internal successors, (97), 3 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:47:52,711 INFO L276 IsEmpty]: Start isEmpty. Operand 4302 states and 6383 transitions. [2021-11-09 09:47:52,712 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2021-11-09 09:47:52,713 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:47:52,713 INFO L513 BasicCegarLoop]: trace histogram [2, 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] [2021-11-09 09:47:52,713 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2021-11-09 09:47:52,713 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 09:47:52,714 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:47:52,714 INFO L85 PathProgramCache]: Analyzing trace with hash -387959571, now seen corresponding path program 1 times [2021-11-09 09:47:52,714 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:47:52,714 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1139193066] [2021-11-09 09:47:52,715 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:47:52,715 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:47:52,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:47:52,995 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 7 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:47:52,995 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:47:52,995 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1139193066] [2021-11-09 09:47:52,995 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1139193066] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:47:52,995 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [150749580] [2021-11-09 09:47:52,995 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:47:52,996 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:47:52,996 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d58943d-f269-402e-9d13-d515f5b26ace/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:47:53,005 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d58943d-f269-402e-9d13-d515f5b26ace/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:47:53,024 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d58943d-f269-402e-9d13-d515f5b26ace/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-09 09:47:53,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:47:53,152 INFO L263 TraceCheckSpWp]: Trace formula consists of 446 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-09 09:47:53,162 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:47:53,874 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 11 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-09 09:47:53,874 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [150749580] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:47:53,875 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 09:47:53,875 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 4] total 16 [2021-11-09 09:47:53,875 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1174467332] [2021-11-09 09:47:53,876 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-11-09 09:47:53,876 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:47:53,877 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-11-09 09:47:53,877 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=202, Unknown=0, NotChecked=0, Total=240 [2021-11-09 09:47:53,877 INFO L87 Difference]: Start difference. First operand 4302 states and 6383 transitions. Second operand has 16 states, 16 states have (on average 11.6875) internal successors, (187), 16 states have internal predecessors, (187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:47:57,712 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:47:57,712 INFO L93 Difference]: Finished difference Result 17204 states and 24163 transitions. [2021-11-09 09:47:57,714 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-11-09 09:47:57,715 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 11.6875) internal successors, (187), 16 states have internal predecessors, (187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 97 [2021-11-09 09:47:57,715 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:47:57,730 INFO L225 Difference]: With dead ends: 17204 [2021-11-09 09:47:57,730 INFO L226 Difference]: Without dead ends: 15226 [2021-11-09 09:47:57,735 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 151 GetRequests, 96 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 881 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=577, Invalid=2615, Unknown=0, NotChecked=0, Total=3192 [2021-11-09 09:47:57,745 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15226 states. [2021-11-09 09:47:58,342 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15226 to 9175. [2021-11-09 09:47:58,348 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9175 states, 9173 states have (on average 1.401613430720593) internal successors, (12857), 9174 states have internal predecessors, (12857), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:47:58,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9175 states to 9175 states and 12857 transitions. [2021-11-09 09:47:58,359 INFO L78 Accepts]: Start accepts. Automaton has 9175 states and 12857 transitions. Word has length 97 [2021-11-09 09:47:58,359 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:47:58,359 INFO L470 AbstractCegarLoop]: Abstraction has 9175 states and 12857 transitions. [2021-11-09 09:47:58,360 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 11.6875) internal successors, (187), 16 states have internal predecessors, (187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:47:58,360 INFO L276 IsEmpty]: Start isEmpty. Operand 9175 states and 12857 transitions. [2021-11-09 09:47:58,361 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2021-11-09 09:47:58,361 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:47:58,362 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 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] [2021-11-09 09:47:58,390 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d58943d-f269-402e-9d13-d515f5b26ace/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-09 09:47:58,572 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d58943d-f269-402e-9d13-d515f5b26ace/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:47:58,573 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 09:47:58,573 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:47:58,573 INFO L85 PathProgramCache]: Analyzing trace with hash -713626361, now seen corresponding path program 1 times [2021-11-09 09:47:58,573 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:47:58,573 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1563544482] [2021-11-09 09:47:58,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:47:58,574 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:47:58,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:47:58,625 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:47:58,625 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:47:58,626 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1563544482] [2021-11-09 09:47:58,626 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1563544482] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 09:47:58,626 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 09:47:58,626 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-09 09:47:58,626 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [132610838] [2021-11-09 09:47:58,627 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-09 09:47:58,627 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:47:58,627 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-09 09:47:58,628 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-09 09:47:58,628 INFO L87 Difference]: Start difference. First operand 9175 states and 12857 transitions. Second operand has 3 states, 3 states have (on average 32.666666666666664) internal successors, (98), 3 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:47:58,976 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:47:58,976 INFO L93 Difference]: Finished difference Result 12194 states and 16976 transitions. [2021-11-09 09:47:58,977 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-09 09:47:58,977 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 32.666666666666664) internal successors, (98), 3 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 98 [2021-11-09 09:47:58,977 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:47:58,984 INFO L225 Difference]: With dead ends: 12194 [2021-11-09 09:47:58,984 INFO L226 Difference]: Without dead ends: 6305 [2021-11-09 09:47:58,988 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-09 09:47:58,992 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6305 states. [2021-11-09 09:47:59,311 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6305 to 6303. [2021-11-09 09:47:59,316 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6303 states, 6301 states have (on average 1.411204570703063) internal successors, (8892), 6302 states have internal predecessors, (8892), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:47:59,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6303 states to 6303 states and 8892 transitions. [2021-11-09 09:47:59,324 INFO L78 Accepts]: Start accepts. Automaton has 6303 states and 8892 transitions. Word has length 98 [2021-11-09 09:47:59,325 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:47:59,325 INFO L470 AbstractCegarLoop]: Abstraction has 6303 states and 8892 transitions. [2021-11-09 09:47:59,325 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 32.666666666666664) internal successors, (98), 3 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:47:59,325 INFO L276 IsEmpty]: Start isEmpty. Operand 6303 states and 8892 transitions. [2021-11-09 09:47:59,326 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2021-11-09 09:47:59,327 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:47:59,327 INFO L513 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] [2021-11-09 09:47:59,327 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2021-11-09 09:47:59,328 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 09:47:59,328 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:47:59,328 INFO L85 PathProgramCache]: Analyzing trace with hash -1294468783, now seen corresponding path program 1 times [2021-11-09 09:47:59,329 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:47:59,329 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [659448206] [2021-11-09 09:47:59,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:47:59,329 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:47:59,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:47:59,594 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:47:59,594 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:47:59,594 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [659448206] [2021-11-09 09:47:59,594 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [659448206] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:47:59,595 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2060192840] [2021-11-09 09:47:59,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:47:59,595 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:47:59,595 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d58943d-f269-402e-9d13-d515f5b26ace/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:47:59,597 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d58943d-f269-402e-9d13-d515f5b26ace/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:47:59,609 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d58943d-f269-402e-9d13-d515f5b26ace/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-09 09:47:59,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:47:59,797 INFO L263 TraceCheckSpWp]: Trace formula consists of 451 conjuncts, 16 conjunts are in the unsatisfiable core [2021-11-09 09:47:59,805 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:48:01,045 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 7 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:48:01,046 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2060192840] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:48:01,046 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 09:48:01,046 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 9] total 21 [2021-11-09 09:48:01,046 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [548147745] [2021-11-09 09:48:01,047 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-11-09 09:48:01,047 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:48:01,047 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-11-09 09:48:01,048 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=396, Unknown=0, NotChecked=0, Total=462 [2021-11-09 09:48:01,048 INFO L87 Difference]: Start difference. First operand 6303 states and 8892 transitions. Second operand has 22 states, 22 states have (on average 8.318181818181818) internal successors, (183), 21 states have internal predecessors, (183), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:48:09,458 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:48:09,458 INFO L93 Difference]: Finished difference Result 50575 states and 66862 transitions. [2021-11-09 09:48:09,458 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2021-11-09 09:48:09,459 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 8.318181818181818) internal successors, (183), 21 states have internal predecessors, (183), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 98 [2021-11-09 09:48:09,459 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:48:09,515 INFO L225 Difference]: With dead ends: 50575 [2021-11-09 09:48:09,516 INFO L226 Difference]: Without dead ends: 46787 [2021-11-09 09:48:09,530 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 183 GetRequests, 90 SyntacticMatches, 0 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2764 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=1483, Invalid=7447, Unknown=0, NotChecked=0, Total=8930 [2021-11-09 09:48:09,563 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46787 states. [2021-11-09 09:48:12,516 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46787 to 29527. [2021-11-09 09:48:12,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29527 states, 29525 states have (on average 1.322133784928027) internal successors, (39036), 29526 states have internal predecessors, (39036), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:48:12,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29527 states to 29527 states and 39036 transitions. [2021-11-09 09:48:12,568 INFO L78 Accepts]: Start accepts. Automaton has 29527 states and 39036 transitions. Word has length 98 [2021-11-09 09:48:12,568 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:48:12,568 INFO L470 AbstractCegarLoop]: Abstraction has 29527 states and 39036 transitions. [2021-11-09 09:48:12,568 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 8.318181818181818) internal successors, (183), 21 states have internal predecessors, (183), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:48:12,568 INFO L276 IsEmpty]: Start isEmpty. Operand 29527 states and 39036 transitions. [2021-11-09 09:48:12,572 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2021-11-09 09:48:12,572 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:48:12,572 INFO L513 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] [2021-11-09 09:48:12,597 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d58943d-f269-402e-9d13-d515f5b26ace/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-09 09:48:12,781 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d58943d-f269-402e-9d13-d515f5b26ace/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:48:12,782 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 09:48:12,782 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:48:12,782 INFO L85 PathProgramCache]: Analyzing trace with hash 730184847, now seen corresponding path program 1 times [2021-11-09 09:48:12,782 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:48:12,783 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [742875814] [2021-11-09 09:48:12,783 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:48:12,783 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:48:12,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:48:12,868 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-09 09:48:12,868 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:48:12,868 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [742875814] [2021-11-09 09:48:12,869 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [742875814] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 09:48:12,869 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 09:48:12,869 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-09 09:48:12,869 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [283311074] [2021-11-09 09:48:12,870 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-09 09:48:12,870 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:48:12,871 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-09 09:48:12,871 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-11-09 09:48:12,871 INFO L87 Difference]: Start difference. First operand 29527 states and 39036 transitions. Second operand has 6 states, 6 states have (on average 15.666666666666666) internal successors, (94), 5 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:48:15,085 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:48:15,085 INFO L93 Difference]: Finished difference Result 49004 states and 64384 transitions. [2021-11-09 09:48:15,085 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-09 09:48:15,085 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 15.666666666666666) internal successors, (94), 5 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 98 [2021-11-09 09:48:15,085 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:48:15,110 INFO L225 Difference]: With dead ends: 49004 [2021-11-09 09:48:15,110 INFO L226 Difference]: Without dead ends: 22339 [2021-11-09 09:48:15,124 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2021-11-09 09:48:15,139 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22339 states. [2021-11-09 09:48:17,593 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22339 to 22339. [2021-11-09 09:48:17,603 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22339 states, 22337 states have (on average 1.3075166763665667) internal successors, (29206), 22338 states have internal predecessors, (29206), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:48:17,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22339 states to 22339 states and 29206 transitions. [2021-11-09 09:48:17,630 INFO L78 Accepts]: Start accepts. Automaton has 22339 states and 29206 transitions. Word has length 98 [2021-11-09 09:48:17,631 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:48:17,631 INFO L470 AbstractCegarLoop]: Abstraction has 22339 states and 29206 transitions. [2021-11-09 09:48:17,631 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.666666666666666) internal successors, (94), 5 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:48:17,631 INFO L276 IsEmpty]: Start isEmpty. Operand 22339 states and 29206 transitions. [2021-11-09 09:48:17,633 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2021-11-09 09:48:17,633 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:48:17,633 INFO L513 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] [2021-11-09 09:48:17,634 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2021-11-09 09:48:17,634 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 09:48:17,634 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:48:17,634 INFO L85 PathProgramCache]: Analyzing trace with hash 89614703, now seen corresponding path program 1 times [2021-11-09 09:48:17,634 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:48:17,634 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2093695415] [2021-11-09 09:48:17,635 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:48:17,635 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:48:17,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:48:17,700 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-09 09:48:17,700 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:48:17,700 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2093695415] [2021-11-09 09:48:17,701 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2093695415] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 09:48:17,701 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 09:48:17,701 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-09 09:48:17,701 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1250625093] [2021-11-09 09:48:17,702 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-09 09:48:17,702 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:48:17,702 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-09 09:48:17,702 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-11-09 09:48:17,703 INFO L87 Difference]: Start difference. First operand 22339 states and 29206 transitions. Second operand has 6 states, 6 states have (on average 15.5) internal successors, (93), 5 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:48:19,412 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:48:19,412 INFO L93 Difference]: Finished difference Result 37277 states and 48339 transitions. [2021-11-09 09:48:19,413 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-09 09:48:19,413 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 15.5) internal successors, (93), 5 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 98 [2021-11-09 09:48:19,413 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:48:19,432 INFO L225 Difference]: With dead ends: 37277 [2021-11-09 09:48:19,432 INFO L226 Difference]: Without dead ends: 17438 [2021-11-09 09:48:19,447 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2021-11-09 09:48:19,460 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17438 states. [2021-11-09 09:48:21,044 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17438 to 17438. [2021-11-09 09:48:21,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17438 states, 17436 states have (on average 1.3013305804083506) internal successors, (22690), 17437 states have internal predecessors, (22690), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:48:21,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17438 states to 17438 states and 22690 transitions. [2021-11-09 09:48:21,078 INFO L78 Accepts]: Start accepts. Automaton has 17438 states and 22690 transitions. Word has length 98 [2021-11-09 09:48:21,078 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:48:21,078 INFO L470 AbstractCegarLoop]: Abstraction has 17438 states and 22690 transitions. [2021-11-09 09:48:21,078 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.5) internal successors, (93), 5 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:48:21,078 INFO L276 IsEmpty]: Start isEmpty. Operand 17438 states and 22690 transitions. [2021-11-09 09:48:21,080 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2021-11-09 09:48:21,080 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:48:21,080 INFO L513 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] [2021-11-09 09:48:21,080 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2021-11-09 09:48:21,081 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 09:48:21,081 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:48:21,081 INFO L85 PathProgramCache]: Analyzing trace with hash 567553615, now seen corresponding path program 1 times [2021-11-09 09:48:21,081 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:48:21,082 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [603424915] [2021-11-09 09:48:21,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:48:21,082 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:48:21,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:48:21,151 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-09 09:48:21,152 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:48:21,152 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [603424915] [2021-11-09 09:48:21,152 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [603424915] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 09:48:21,152 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 09:48:21,152 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-09 09:48:21,153 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2111140414] [2021-11-09 09:48:21,153 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-09 09:48:21,153 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:48:21,154 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-09 09:48:21,154 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-11-09 09:48:21,154 INFO L87 Difference]: Start difference. First operand 17438 states and 22690 transitions. Second operand has 6 states, 6 states have (on average 15.333333333333334) internal successors, (92), 5 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:48:22,573 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:48:22,573 INFO L93 Difference]: Finished difference Result 29228 states and 37643 transitions. [2021-11-09 09:48:22,574 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-09 09:48:22,574 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 15.333333333333334) internal successors, (92), 5 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 98 [2021-11-09 09:48:22,574 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:48:22,588 INFO L225 Difference]: With dead ends: 29228 [2021-11-09 09:48:22,589 INFO L226 Difference]: Without dead ends: 14154 [2021-11-09 09:48:22,596 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2021-11-09 09:48:22,604 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14154 states. [2021-11-09 09:48:23,823 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14154 to 14154. [2021-11-09 09:48:23,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14154 states, 14152 states have (on average 1.3030667043527417) internal successors, (18441), 14153 states have internal predecessors, (18441), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:48:23,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14154 states to 14154 states and 18441 transitions. [2021-11-09 09:48:23,852 INFO L78 Accepts]: Start accepts. Automaton has 14154 states and 18441 transitions. Word has length 98 [2021-11-09 09:48:23,852 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:48:23,852 INFO L470 AbstractCegarLoop]: Abstraction has 14154 states and 18441 transitions. [2021-11-09 09:48:23,852 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.333333333333334) internal successors, (92), 5 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:48:23,853 INFO L276 IsEmpty]: Start isEmpty. Operand 14154 states and 18441 transitions. [2021-11-09 09:48:23,855 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2021-11-09 09:48:23,855 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:48:23,855 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:48:23,856 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2021-11-09 09:48:23,856 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 09:48:23,856 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:48:23,856 INFO L85 PathProgramCache]: Analyzing trace with hash -1199123718, now seen corresponding path program 1 times [2021-11-09 09:48:23,857 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:48:23,857 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [277198188] [2021-11-09 09:48:23,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:48:23,857 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:48:23,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:48:24,026 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 13 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:48:24,027 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:48:24,027 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [277198188] [2021-11-09 09:48:24,027 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [277198188] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:48:24,027 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1170180588] [2021-11-09 09:48:24,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:48:24,027 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:48:24,028 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d58943d-f269-402e-9d13-d515f5b26ace/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:48:24,028 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d58943d-f269-402e-9d13-d515f5b26ace/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:48:24,049 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d58943d-f269-402e-9d13-d515f5b26ace/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-09 09:48:24,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:48:24,322 INFO L263 TraceCheckSpWp]: Trace formula consists of 453 conjuncts, 16 conjunts are in the unsatisfiable core [2021-11-09 09:48:24,326 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:48:25,541 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 11 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:48:25,541 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1170180588] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:48:25,541 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 09:48:25,541 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2021-11-09 09:48:25,542 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1802903578] [2021-11-09 09:48:25,542 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-11-09 09:48:25,542 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:48:25,543 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-11-09 09:48:25,543 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=253, Unknown=0, NotChecked=0, Total=306 [2021-11-09 09:48:25,543 INFO L87 Difference]: Start difference. First operand 14154 states and 18441 transitions. Second operand has 18 states, 18 states have (on average 9.666666666666666) internal successors, (174), 17 states have internal predecessors, (174), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:48:40,156 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:48:40,156 INFO L93 Difference]: Finished difference Result 114015 states and 145192 transitions. [2021-11-09 09:48:40,156 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-11-09 09:48:40,157 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 9.666666666666666) internal successors, (174), 17 states have internal predecessors, (174), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 99 [2021-11-09 09:48:40,157 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:48:40,538 INFO L225 Difference]: With dead ends: 114015 [2021-11-09 09:48:40,539 INFO L226 Difference]: Without dead ends: 102638 [2021-11-09 09:48:40,563 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 151 GetRequests, 91 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 968 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=742, Invalid=3040, Unknown=0, NotChecked=0, Total=3782 [2021-11-09 09:48:40,620 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102638 states. [2021-11-09 09:48:49,573 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102638 to 67348. [2021-11-09 09:48:49,606 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67348 states, 67346 states have (on average 1.246369494847504) internal successors, (83938), 67347 states have internal predecessors, (83938), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:48:49,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67348 states to 67348 states and 83938 transitions. [2021-11-09 09:48:49,702 INFO L78 Accepts]: Start accepts. Automaton has 67348 states and 83938 transitions. Word has length 99 [2021-11-09 09:48:49,702 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:48:49,702 INFO L470 AbstractCegarLoop]: Abstraction has 67348 states and 83938 transitions. [2021-11-09 09:48:49,702 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 9.666666666666666) internal successors, (174), 17 states have internal predecessors, (174), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:48:49,702 INFO L276 IsEmpty]: Start isEmpty. Operand 67348 states and 83938 transitions. [2021-11-09 09:48:49,705 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2021-11-09 09:48:49,705 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:48:49,705 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:48:49,725 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d58943d-f269-402e-9d13-d515f5b26ace/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-09 09:48:49,909 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d58943d-f269-402e-9d13-d515f5b26ace/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2021-11-09 09:48:49,909 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 09:48:49,909 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:48:49,909 INFO L85 PathProgramCache]: Analyzing trace with hash -1535817218, now seen corresponding path program 1 times [2021-11-09 09:48:49,910 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:48:49,910 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [665784878] [2021-11-09 09:48:49,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:48:49,910 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:48:49,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:48:49,999 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-11-09 09:48:49,999 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:48:50,000 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [665784878] [2021-11-09 09:48:50,000 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [665784878] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 09:48:50,000 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 09:48:50,000 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-09 09:48:50,000 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1059793811] [2021-11-09 09:48:50,001 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-09 09:48:50,001 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:48:50,001 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-09 09:48:50,002 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-11-09 09:48:50,002 INFO L87 Difference]: Start difference. First operand 67348 states and 83938 transitions. Second operand has 6 states, 6 states have (on average 15.333333333333334) internal successors, (92), 5 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)