./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/eca-rers2012/Problem19_label08.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 9ad7fb26 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef3ae282-3b4f-4528-bdd5-55551804fe0c/bin/uautomizer-tBqnrhUYjU/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef3ae282-3b4f-4528-bdd5-55551804fe0c/bin/uautomizer-tBqnrhUYjU/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef3ae282-3b4f-4528-bdd5-55551804fe0c/bin/uautomizer-tBqnrhUYjU/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef3ae282-3b4f-4528-bdd5-55551804fe0c/bin/uautomizer-tBqnrhUYjU/config/AutomizerReach.xml -i ../../sv-benchmarks/c/eca-rers2012/Problem19_label08.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef3ae282-3b4f-4528-bdd5-55551804fe0c/bin/uautomizer-tBqnrhUYjU/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef3ae282-3b4f-4528-bdd5-55551804fe0c/bin/uautomizer-tBqnrhUYjU --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 3deeb63379d54c05d0983698ddc1fa49b6cf4b0b9b3a770af64a435678802fb9 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-9ad7fb2 [2021-11-02 22:12:57,758 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-02 22:12:57,794 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-02 22:12:57,856 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-02 22:12:57,857 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-02 22:12:57,863 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-02 22:12:57,866 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-02 22:12:57,870 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-02 22:12:57,873 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-02 22:12:57,882 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-02 22:12:57,883 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-02 22:12:57,885 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-02 22:12:57,886 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-02 22:12:57,889 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-02 22:12:57,891 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-02 22:12:57,898 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-02 22:12:57,900 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-02 22:12:57,901 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-02 22:12:57,904 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-02 22:12:57,912 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-02 22:12:57,914 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-02 22:12:57,916 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-02 22:12:57,919 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-02 22:12:57,920 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-02 22:12:57,924 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-02 22:12:57,925 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-02 22:12:57,925 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-02 22:12:57,927 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-02 22:12:57,928 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-02 22:12:57,930 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-02 22:12:57,930 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-02 22:12:57,931 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-02 22:12:57,934 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-02 22:12:57,935 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-02 22:12:57,937 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-02 22:12:57,937 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-02 22:12:57,938 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-02 22:12:57,938 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-02 22:12:57,939 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-02 22:12:57,940 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-02 22:12:57,940 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-02 22:12:57,941 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef3ae282-3b4f-4528-bdd5-55551804fe0c/bin/uautomizer-tBqnrhUYjU/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-11-02 22:12:57,986 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-02 22:12:57,986 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-02 22:12:57,987 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-02 22:12:57,987 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-02 22:12:57,989 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-02 22:12:57,989 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-02 22:12:57,990 INFO L138 SettingsManager]: * Use SBE=true [2021-11-02 22:12:57,990 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-02 22:12:57,990 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-02 22:12:57,991 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-02 22:12:57,992 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-02 22:12:57,992 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-02 22:12:57,992 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-02 22:12:57,993 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-02 22:12:57,993 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-02 22:12:57,993 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-02 22:12:57,993 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-02 22:12:57,994 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-02 22:12:57,994 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-02 22:12:57,994 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-02 22:12:57,994 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-02 22:12:57,995 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-02 22:12:57,995 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-02 22:12:57,995 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-02 22:12:57,996 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-02 22:12:57,996 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-02 22:12:57,996 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-11-02 22:12:57,996 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-02 22:12:57,997 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-11-02 22:12:57,998 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-11-02 22:12:57,999 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-02 22:12:57,999 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-02 22:12:58,000 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_ef3ae282-3b4f-4528-bdd5-55551804fe0c/bin/uautomizer-tBqnrhUYjU/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef3ae282-3b4f-4528-bdd5-55551804fe0c/bin/uautomizer-tBqnrhUYjU Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 3deeb63379d54c05d0983698ddc1fa49b6cf4b0b9b3a770af64a435678802fb9 [2021-11-02 22:12:58,331 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-02 22:12:58,356 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-02 22:12:58,359 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-02 22:12:58,360 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-02 22:12:58,361 INFO L275 PluginConnector]: CDTParser initialized [2021-11-02 22:12:58,363 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef3ae282-3b4f-4528-bdd5-55551804fe0c/bin/uautomizer-tBqnrhUYjU/../../sv-benchmarks/c/eca-rers2012/Problem19_label08.c [2021-11-02 22:12:58,451 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef3ae282-3b4f-4528-bdd5-55551804fe0c/bin/uautomizer-tBqnrhUYjU/data/8da3efc9d/ea8fe7e338d7438ca420ae252bccbed8/FLAG3adce652b [2021-11-02 22:12:59,647 INFO L306 CDTParser]: Found 1 translation units. [2021-11-02 22:12:59,649 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef3ae282-3b4f-4528-bdd5-55551804fe0c/sv-benchmarks/c/eca-rers2012/Problem19_label08.c [2021-11-02 22:12:59,737 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef3ae282-3b4f-4528-bdd5-55551804fe0c/bin/uautomizer-tBqnrhUYjU/data/8da3efc9d/ea8fe7e338d7438ca420ae252bccbed8/FLAG3adce652b [2021-11-02 22:12:59,909 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef3ae282-3b4f-4528-bdd5-55551804fe0c/bin/uautomizer-tBqnrhUYjU/data/8da3efc9d/ea8fe7e338d7438ca420ae252bccbed8 [2021-11-02 22:12:59,911 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-02 22:12:59,914 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-02 22:12:59,916 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-02 22:12:59,916 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-02 22:12:59,920 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-02 22:12:59,921 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.11 10:12:59" (1/1) ... [2021-11-02 22:12:59,923 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4efa53e6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:12:59, skipping insertion in model container [2021-11-02 22:12:59,923 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.11 10:12:59" (1/1) ... [2021-11-02 22:12:59,931 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-02 22:13:00,202 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-02 22:13:00,714 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_ef3ae282-3b4f-4528-bdd5-55551804fe0c/sv-benchmarks/c/eca-rers2012/Problem19_label08.c[5076,5089] [2021-11-02 22:13:02,511 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-02 22:13:02,523 INFO L203 MainTranslator]: Completed pre-run [2021-11-02 22:13:02,564 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_ef3ae282-3b4f-4528-bdd5-55551804fe0c/sv-benchmarks/c/eca-rers2012/Problem19_label08.c[5076,5089] [2021-11-02 22:13:03,643 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-02 22:13:03,687 INFO L208 MainTranslator]: Completed translation [2021-11-02 22:13:03,688 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:13:03 WrapperNode [2021-11-02 22:13:03,688 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-02 22:13:03,689 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-02 22:13:03,689 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-02 22:13:03,689 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-02 22:13:03,697 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:13:03" (1/1) ... [2021-11-02 22:13:03,815 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:13:03" (1/1) ... [2021-11-02 22:13:04,970 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-02 22:13:04,989 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-02 22:13:04,989 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-02 22:13:04,989 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-02 22:13:05,007 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:13:03" (1/1) ... [2021-11-02 22:13:05,020 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:13:03" (1/1) ... [2021-11-02 22:13:05,373 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:13:03" (1/1) ... [2021-11-02 22:13:05,379 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:13:03" (1/1) ... [2021-11-02 22:13:05,921 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:13:03" (1/1) ... [2021-11-02 22:13:06,100 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:13:03" (1/1) ... [2021-11-02 22:13:06,167 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:13:03" (1/1) ... [2021-11-02 22:13:06,370 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-02 22:13:06,371 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-02 22:13:06,371 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-02 22:13:06,372 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-02 22:13:06,374 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:13:03" (1/1) ... [2021-11-02 22:13:06,382 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-02 22:13:06,394 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef3ae282-3b4f-4528-bdd5-55551804fe0c/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 22:13:06,410 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef3ae282-3b4f-4528-bdd5-55551804fe0c/bin/uautomizer-tBqnrhUYjU/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-02 22:13:06,428 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef3ae282-3b4f-4528-bdd5-55551804fe0c/bin/uautomizer-tBqnrhUYjU/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-02 22:13:06,455 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-02 22:13:06,456 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-02 22:13:06,456 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-02 22:13:06,456 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-02 22:13:16,657 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-02 22:13:16,658 INFO L299 CfgBuilder]: Removed 17 assume(true) statements. [2021-11-02 22:13:16,664 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.11 10:13:16 BoogieIcfgContainer [2021-11-02 22:13:16,665 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-02 22:13:16,666 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-02 22:13:16,667 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-02 22:13:16,670 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-02 22:13:16,671 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.11 10:12:59" (1/3) ... [2021-11-02 22:13:16,672 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@15724fd8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.11 10:13:16, skipping insertion in model container [2021-11-02 22:13:16,672 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:13:03" (2/3) ... [2021-11-02 22:13:16,673 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@15724fd8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.11 10:13:16, skipping insertion in model container [2021-11-02 22:13:16,673 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.11 10:13:16" (3/3) ... [2021-11-02 22:13:16,675 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem19_label08.c [2021-11-02 22:13:16,681 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-02 22:13:16,681 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-02 22:13:16,767 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-02 22:13:16,777 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 [2021-11-02 22:13:16,777 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-02 22:13:16,840 INFO L276 IsEmpty]: Start isEmpty. Operand has 1748 states, 1746 states have (on average 1.8699885452462772) internal successors, (3265), 1747 states have internal predecessors, (3265), 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) [2021-11-02 22:13:16,850 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-11-02 22:13:16,850 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:13:16,851 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] [2021-11-02 22:13:16,852 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:13:16,859 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:13:16,860 INFO L85 PathProgramCache]: Analyzing trace with hash 2088660649, now seen corresponding path program 1 times [2021-11-02 22:13:16,874 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:13:16,875 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [595577770] [2021-11-02 22:13:16,875 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:13:16,877 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:13:17,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:13:17,207 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:13:17,208 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:13:17,208 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [595577770] [2021-11-02 22:13:17,209 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [595577770] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 22:13:17,209 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 22:13:17,210 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-02 22:13:17,212 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1603637033] [2021-11-02 22:13:17,217 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-02 22:13:17,217 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:13:17,231 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-02 22:13:17,232 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-02 22:13:17,240 INFO L87 Difference]: Start difference. First operand has 1748 states, 1746 states have (on average 1.8699885452462772) internal successors, (3265), 1747 states have internal predecessors, (3265), 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 3 states, 3 states have (on average 12.333333333333334) internal successors, (37), 2 states have internal predecessors, (37), 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) [2021-11-02 22:13:27,012 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:13:27,012 INFO L93 Difference]: Finished difference Result 4992 states and 9449 transitions. [2021-11-02 22:13:27,013 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-02 22:13:27,015 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 12.333333333333334) internal successors, (37), 2 states have internal predecessors, (37), 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 37 [2021-11-02 22:13:27,015 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:13:27,066 INFO L225 Difference]: With dead ends: 4992 [2021-11-02 22:13:27,066 INFO L226 Difference]: Without dead ends: 3180 [2021-11-02 22:13:27,076 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-02 22:13:27,100 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3180 states. [2021-11-02 22:13:27,259 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3180 to 3122. [2021-11-02 22:13:27,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3122 states, 3121 states have (on average 1.7282922140339634) internal successors, (5394), 3121 states have internal predecessors, (5394), 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) [2021-11-02 22:13:27,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3122 states to 3122 states and 5394 transitions. [2021-11-02 22:13:27,292 INFO L78 Accepts]: Start accepts. Automaton has 3122 states and 5394 transitions. Word has length 37 [2021-11-02 22:13:27,292 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:13:27,293 INFO L470 AbstractCegarLoop]: Abstraction has 3122 states and 5394 transitions. [2021-11-02 22:13:27,293 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 12.333333333333334) internal successors, (37), 2 states have internal predecessors, (37), 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) [2021-11-02 22:13:27,294 INFO L276 IsEmpty]: Start isEmpty. Operand 3122 states and 5394 transitions. [2021-11-02 22:13:27,302 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2021-11-02 22:13:27,303 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:13:27,304 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, 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] [2021-11-02 22:13:27,304 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-02 22:13:27,305 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:13:27,310 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:13:27,310 INFO L85 PathProgramCache]: Analyzing trace with hash -34405716, now seen corresponding path program 1 times [2021-11-02 22:13:27,310 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:13:27,311 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1495143489] [2021-11-02 22:13:27,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:13:27,312 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:13:27,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:13:27,551 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 34 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:13:27,551 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:13:27,552 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1495143489] [2021-11-02 22:13:27,552 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1495143489] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 22:13:27,552 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 22:13:27,553 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-02 22:13:27,553 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [879396510] [2021-11-02 22:13:27,555 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-02 22:13:27,555 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:13:27,556 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-02 22:13:27,556 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-02 22:13:27,557 INFO L87 Difference]: Start difference. First operand 3122 states and 5394 transitions. Second operand has 3 states, 3 states have (on average 35.0) internal successors, (105), 2 states have internal predecessors, (105), 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) [2021-11-02 22:13:37,076 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:13:37,080 INFO L93 Difference]: Finished difference Result 9135 states and 15860 transitions. [2021-11-02 22:13:37,081 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-02 22:13:37,082 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 35.0) internal successors, (105), 2 states have internal predecessors, (105), 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 105 [2021-11-02 22:13:37,083 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:13:37,123 INFO L225 Difference]: With dead ends: 9135 [2021-11-02 22:13:37,124 INFO L226 Difference]: Without dead ends: 6015 [2021-11-02 22:13:37,132 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-02 22:13:37,141 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6015 states. [2021-11-02 22:13:37,309 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6015 to 6013. [2021-11-02 22:13:37,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6013 states, 6012 states have (on average 1.6708250166333998) internal successors, (10045), 6012 states have internal predecessors, (10045), 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) [2021-11-02 22:13:37,344 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6013 states to 6013 states and 10045 transitions. [2021-11-02 22:13:37,344 INFO L78 Accepts]: Start accepts. Automaton has 6013 states and 10045 transitions. Word has length 105 [2021-11-02 22:13:37,346 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:13:37,346 INFO L470 AbstractCegarLoop]: Abstraction has 6013 states and 10045 transitions. [2021-11-02 22:13:37,347 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 35.0) internal successors, (105), 2 states have internal predecessors, (105), 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) [2021-11-02 22:13:37,347 INFO L276 IsEmpty]: Start isEmpty. Operand 6013 states and 10045 transitions. [2021-11-02 22:13:37,356 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2021-11-02 22:13:37,357 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:13:37,358 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, 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] [2021-11-02 22:13:37,358 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-02 22:13:37,358 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:13:37,365 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:13:37,371 INFO L85 PathProgramCache]: Analyzing trace with hash 1450580863, now seen corresponding path program 1 times [2021-11-02 22:13:37,372 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:13:37,372 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [927403014] [2021-11-02 22:13:37,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:13:37,373 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:13:37,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:13:37,552 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 34 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:13:37,552 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:13:37,552 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [927403014] [2021-11-02 22:13:37,557 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [927403014] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 22:13:37,557 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 22:13:37,557 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-02 22:13:37,558 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1451774256] [2021-11-02 22:13:37,558 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-02 22:13:37,559 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:13:37,560 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-02 22:13:37,560 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-02 22:13:37,560 INFO L87 Difference]: Start difference. First operand 6013 states and 10045 transitions. Second operand has 3 states, 3 states have (on average 36.0) internal successors, (108), 2 states have internal predecessors, (108), 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) [2021-11-02 22:13:45,682 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:13:45,682 INFO L93 Difference]: Finished difference Result 17598 states and 29555 transitions. [2021-11-02 22:13:45,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-02 22:13:45,683 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 36.0) internal successors, (108), 2 states have internal predecessors, (108), 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 108 [2021-11-02 22:13:45,684 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:13:45,754 INFO L225 Difference]: With dead ends: 17598 [2021-11-02 22:13:45,754 INFO L226 Difference]: Without dead ends: 11587 [2021-11-02 22:13:45,765 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-02 22:13:45,782 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11587 states. [2021-11-02 22:13:45,987 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11587 to 11552. [2021-11-02 22:13:46,011 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11552 states, 11551 states have (on average 1.4577092892390269) internal successors, (16838), 11551 states have internal predecessors, (16838), 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) [2021-11-02 22:13:46,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11552 states to 11552 states and 16838 transitions. [2021-11-02 22:13:46,038 INFO L78 Accepts]: Start accepts. Automaton has 11552 states and 16838 transitions. Word has length 108 [2021-11-02 22:13:46,039 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:13:46,039 INFO L470 AbstractCegarLoop]: Abstraction has 11552 states and 16838 transitions. [2021-11-02 22:13:46,040 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 36.0) internal successors, (108), 2 states have internal predecessors, (108), 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) [2021-11-02 22:13:46,040 INFO L276 IsEmpty]: Start isEmpty. Operand 11552 states and 16838 transitions. [2021-11-02 22:13:46,043 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2021-11-02 22:13:46,043 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:13:46,043 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, 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] [2021-11-02 22:13:46,044 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-02 22:13:46,044 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:13:46,045 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:13:46,045 INFO L85 PathProgramCache]: Analyzing trace with hash 434177230, now seen corresponding path program 1 times [2021-11-02 22:13:46,045 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:13:46,046 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [950758254] [2021-11-02 22:13:46,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:13:46,047 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:13:46,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:13:46,218 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 34 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:13:46,222 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:13:46,223 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [950758254] [2021-11-02 22:13:46,223 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [950758254] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 22:13:46,224 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 22:13:46,225 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-02 22:13:46,225 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1934655850] [2021-11-02 22:13:46,226 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-02 22:13:46,228 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:13:46,229 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-02 22:13:46,230 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-02 22:13:46,231 INFO L87 Difference]: Start difference. First operand 11552 states and 16838 transitions. Second operand has 3 states, 3 states have (on average 44.666666666666664) internal successors, (134), 2 states have internal predecessors, (134), 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) [2021-11-02 22:13:54,224 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:13:54,224 INFO L93 Difference]: Finished difference Result 34262 states and 50007 transitions. [2021-11-02 22:13:54,231 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-02 22:13:54,232 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 44.666666666666664) internal successors, (134), 2 states have internal predecessors, (134), 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 134 [2021-11-02 22:13:54,236 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:13:54,304 INFO L225 Difference]: With dead ends: 34262 [2021-11-02 22:13:54,305 INFO L226 Difference]: Without dead ends: 22712 [2021-11-02 22:13:54,325 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-02 22:13:54,363 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22712 states. [2021-11-02 22:13:54,720 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22712 to 22687. [2021-11-02 22:13:54,762 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22687 states, 22686 states have (on average 1.2819359957683152) internal successors, (29082), 22686 states have internal predecessors, (29082), 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) [2021-11-02 22:13:54,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22687 states to 22687 states and 29082 transitions. [2021-11-02 22:13:54,806 INFO L78 Accepts]: Start accepts. Automaton has 22687 states and 29082 transitions. Word has length 134 [2021-11-02 22:13:54,808 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:13:54,808 INFO L470 AbstractCegarLoop]: Abstraction has 22687 states and 29082 transitions. [2021-11-02 22:13:54,809 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 44.666666666666664) internal successors, (134), 2 states have internal predecessors, (134), 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) [2021-11-02 22:13:54,809 INFO L276 IsEmpty]: Start isEmpty. Operand 22687 states and 29082 transitions. [2021-11-02 22:13:54,817 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 417 [2021-11-02 22:13:54,818 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:13:54,818 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:13:54,818 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-02 22:13:54,819 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:13:54,822 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:13:54,823 INFO L85 PathProgramCache]: Analyzing trace with hash -1362972267, now seen corresponding path program 1 times [2021-11-02 22:13:54,824 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:13:54,824 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2103830620] [2021-11-02 22:13:54,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:13:54,825 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:13:54,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:13:55,202 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 193 proven. 0 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2021-11-02 22:13:55,203 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:13:55,204 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2103830620] [2021-11-02 22:13:55,204 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2103830620] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 22:13:55,204 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 22:13:55,204 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-02 22:13:55,205 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [699027074] [2021-11-02 22:13:55,206 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-02 22:13:55,206 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:13:55,207 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-02 22:13:55,207 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-02 22:13:55,207 INFO L87 Difference]: Start difference. First operand 22687 states and 29082 transitions. Second operand has 4 states, 4 states have (on average 95.5) internal successors, (382), 3 states have internal predecessors, (382), 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) [2021-11-02 22:14:07,988 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:14:07,988 INFO L93 Difference]: Finished difference Result 57744 states and 72061 transitions. [2021-11-02 22:14:07,989 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-02 22:14:07,989 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 95.5) internal successors, (382), 3 states have internal predecessors, (382), 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 416 [2021-11-02 22:14:07,990 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:14:08,066 INFO L225 Difference]: With dead ends: 57744 [2021-11-02 22:14:08,066 INFO L226 Difference]: Without dead ends: 35059 [2021-11-02 22:14:08,098 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 [2021-11-02 22:14:08,147 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35059 states. [2021-11-02 22:14:08,613 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35059 to 33649. [2021-11-02 22:14:08,656 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33649 states, 33648 states have (on average 1.226254160722777) internal successors, (41261), 33648 states have internal predecessors, (41261), 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) [2021-11-02 22:14:08,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33649 states to 33649 states and 41261 transitions. [2021-11-02 22:14:08,714 INFO L78 Accepts]: Start accepts. Automaton has 33649 states and 41261 transitions. Word has length 416 [2021-11-02 22:14:08,714 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:14:08,715 INFO L470 AbstractCegarLoop]: Abstraction has 33649 states and 41261 transitions. [2021-11-02 22:14:08,715 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 95.5) internal successors, (382), 3 states have internal predecessors, (382), 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) [2021-11-02 22:14:08,716 INFO L276 IsEmpty]: Start isEmpty. Operand 33649 states and 41261 transitions. [2021-11-02 22:14:08,737 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 624 [2021-11-02 22:14:08,737 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:14:08,738 INFO L513 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2021-11-02 22:14:08,739 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-02 22:14:08,739 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:14:08,739 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:14:08,740 INFO L85 PathProgramCache]: Analyzing trace with hash -1488946701, now seen corresponding path program 1 times [2021-11-02 22:14:08,740 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:14:08,741 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [226586097] [2021-11-02 22:14:08,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:14:08,741 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:14:08,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:14:09,127 INFO L134 CoverageAnalysis]: Checked inductivity of 629 backedges. 399 proven. 0 refuted. 0 times theorem prover too weak. 230 trivial. 0 not checked. [2021-11-02 22:14:09,127 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:14:09,128 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [226586097] [2021-11-02 22:14:09,128 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [226586097] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 22:14:09,128 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 22:14:09,129 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-02 22:14:09,131 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [400336139] [2021-11-02 22:14:09,133 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-02 22:14:09,137 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:14:09,137 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-02 22:14:09,138 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-02 22:14:09,138 INFO L87 Difference]: Start difference. First operand 33649 states and 41261 transitions. Second operand has 4 states, 4 states have (on average 107.5) internal successors, (430), 3 states have internal predecessors, (430), 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) [2021-11-02 22:14:22,445 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:14:22,446 INFO L93 Difference]: Finished difference Result 90600 states and 108578 transitions. [2021-11-02 22:14:22,447 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-02 22:14:22,447 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 107.5) internal successors, (430), 3 states have internal predecessors, (430), 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 623 [2021-11-02 22:14:22,447 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:14:22,563 INFO L225 Difference]: With dead ends: 90600 [2021-11-02 22:14:22,563 INFO L226 Difference]: Without dead ends: 56953 [2021-11-02 22:14:22,606 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 [2021-11-02 22:14:22,673 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56953 states. [2021-11-02 22:14:23,918 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56953 to 52814. [2021-11-02 22:14:23,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52814 states, 52813 states have (on average 1.1741995342055933) internal successors, (62013), 52813 states have internal predecessors, (62013), 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) [2021-11-02 22:14:24,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52814 states to 52814 states and 62013 transitions. [2021-11-02 22:14:24,062 INFO L78 Accepts]: Start accepts. Automaton has 52814 states and 62013 transitions. Word has length 623 [2021-11-02 22:14:24,064 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:14:24,064 INFO L470 AbstractCegarLoop]: Abstraction has 52814 states and 62013 transitions. [2021-11-02 22:14:24,065 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 107.5) internal successors, (430), 3 states have internal predecessors, (430), 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) [2021-11-02 22:14:24,065 INFO L276 IsEmpty]: Start isEmpty. Operand 52814 states and 62013 transitions. [2021-11-02 22:14:24,376 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 652 [2021-11-02 22:14:24,377 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:14:24,378 INFO L513 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2021-11-02 22:14:24,378 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-11-02 22:14:24,378 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:14:24,379 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:14:24,379 INFO L85 PathProgramCache]: Analyzing trace with hash 520786509, now seen corresponding path program 1 times [2021-11-02 22:14:24,380 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:14:24,387 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [460028686] [2021-11-02 22:14:24,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:14:24,387 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:14:24,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:14:24,888 INFO L134 CoverageAnalysis]: Checked inductivity of 641 backedges. 463 proven. 0 refuted. 0 times theorem prover too weak. 178 trivial. 0 not checked. [2021-11-02 22:14:24,889 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:14:24,890 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [460028686] [2021-11-02 22:14:24,890 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [460028686] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 22:14:24,891 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 22:14:24,891 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-02 22:14:24,891 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1807742150] [2021-11-02 22:14:24,893 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-02 22:14:24,893 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:14:24,894 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-02 22:14:24,894 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-02 22:14:24,894 INFO L87 Difference]: Start difference. First operand 52814 states and 62013 transitions. Second operand has 4 states, 4 states have (on average 121.0) internal successors, (484), 3 states have internal predecessors, (484), 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) [2021-11-02 22:14:33,660 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:14:33,660 INFO L93 Difference]: Finished difference Result 108387 states and 126803 transitions. [2021-11-02 22:14:33,660 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-02 22:14:33,661 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 121.0) internal successors, (484), 3 states have internal predecessors, (484), 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 651 [2021-11-02 22:14:33,661 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:14:33,740 INFO L225 Difference]: With dead ends: 108387 [2021-11-02 22:14:33,740 INFO L226 Difference]: Without dead ends: 55544 [2021-11-02 22:14:33,769 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-02 22:14:33,834 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55544 states. [2021-11-02 22:14:34,875 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55544 to 55544. [2021-11-02 22:14:34,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55544 states, 55543 states have (on average 1.1657274544046954) internal successors, (64748), 55543 states have internal predecessors, (64748), 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) [2021-11-02 22:14:35,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55544 states to 55544 states and 64748 transitions. [2021-11-02 22:14:35,065 INFO L78 Accepts]: Start accepts. Automaton has 55544 states and 64748 transitions. Word has length 651 [2021-11-02 22:14:35,066 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:14:35,067 INFO L470 AbstractCegarLoop]: Abstraction has 55544 states and 64748 transitions. [2021-11-02 22:14:35,067 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 121.0) internal successors, (484), 3 states have internal predecessors, (484), 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) [2021-11-02 22:14:35,067 INFO L276 IsEmpty]: Start isEmpty. Operand 55544 states and 64748 transitions. [2021-11-02 22:14:35,099 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 737 [2021-11-02 22:14:35,099 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:14:35,101 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:14:35,101 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-11-02 22:14:35,101 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:14:35,102 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:14:35,102 INFO L85 PathProgramCache]: Analyzing trace with hash 632823743, now seen corresponding path program 1 times [2021-11-02 22:14:35,103 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:14:35,103 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1801329453] [2021-11-02 22:14:35,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:14:35,104 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:14:35,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:14:35,893 INFO L134 CoverageAnalysis]: Checked inductivity of 278 backedges. 69 proven. 0 refuted. 0 times theorem prover too weak. 209 trivial. 0 not checked. [2021-11-02 22:14:35,894 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:14:35,894 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1801329453] [2021-11-02 22:14:35,894 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1801329453] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 22:14:35,895 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 22:14:35,895 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-02 22:14:35,895 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1772002447] [2021-11-02 22:14:35,897 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-02 22:14:35,897 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:14:35,898 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-02 22:14:35,898 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-02 22:14:35,899 INFO L87 Difference]: Start difference. First operand 55544 states and 64748 transitions. Second operand has 3 states, 3 states have (on average 176.0) internal successors, (528), 3 states have internal predecessors, (528), 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) [2021-11-02 22:14:45,579 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:14:45,579 INFO L93 Difference]: Finished difference Result 133114 states and 156925 transitions. [2021-11-02 22:14:45,593 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-02 22:14:45,593 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 176.0) internal successors, (528), 3 states have internal predecessors, (528), 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 736 [2021-11-02 22:14:45,595 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:14:45,756 INFO L225 Difference]: With dead ends: 133114 [2021-11-02 22:14:45,757 INFO L226 Difference]: Without dead ends: 80302 [2021-11-02 22:14:45,785 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-02 22:14:45,870 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80302 states. [2021-11-02 22:14:47,015 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80302 to 77413. [2021-11-02 22:14:47,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77413 states, 77412 states have (on average 1.182491086653232) internal successors, (91539), 77412 states have internal predecessors, (91539), 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) [2021-11-02 22:14:47,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77413 states to 77413 states and 91539 transitions. [2021-11-02 22:14:47,221 INFO L78 Accepts]: Start accepts. Automaton has 77413 states and 91539 transitions. Word has length 736 [2021-11-02 22:14:47,223 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:14:47,223 INFO L470 AbstractCegarLoop]: Abstraction has 77413 states and 91539 transitions. [2021-11-02 22:14:47,224 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 176.0) internal successors, (528), 3 states have internal predecessors, (528), 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) [2021-11-02 22:14:47,224 INFO L276 IsEmpty]: Start isEmpty. Operand 77413 states and 91539 transitions. [2021-11-02 22:14:47,236 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 744 [2021-11-02 22:14:47,237 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:14:47,241 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:14:47,241 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-11-02 22:14:47,241 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:14:47,242 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:14:47,242 INFO L85 PathProgramCache]: Analyzing trace with hash -1740471782, now seen corresponding path program 1 times [2021-11-02 22:14:47,243 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:14:47,243 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [888599709] [2021-11-02 22:14:47,243 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:14:47,244 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:14:47,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:14:48,590 INFO L134 CoverageAnalysis]: Checked inductivity of 287 backedges. 69 proven. 218 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:14:48,591 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:14:48,591 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [888599709] [2021-11-02 22:14:48,591 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [888599709] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:14:48,592 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [978742000] [2021-11-02 22:14:48,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:14:48,592 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:14:48,593 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef3ae282-3b4f-4528-bdd5-55551804fe0c/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 22:14:48,600 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef3ae282-3b4f-4528-bdd5-55551804fe0c/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 22:14:48,620 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef3ae282-3b4f-4528-bdd5-55551804fe0c/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-02 22:14:48,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:14:48,924 INFO L263 TraceCheckSpWp]: Trace formula consists of 865 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-02 22:14:48,956 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:14:50,931 INFO L134 CoverageAnalysis]: Checked inductivity of 287 backedges. 69 proven. 0 refuted. 0 times theorem prover too weak. 218 trivial. 0 not checked. [2021-11-02 22:14:50,932 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [978742000] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 22:14:50,932 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-11-02 22:14:50,932 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 8 [2021-11-02 22:14:50,933 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1197352606] [2021-11-02 22:14:50,934 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-02 22:14:50,934 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:14:50,935 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-02 22:14:50,935 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-11-02 22:14:50,936 INFO L87 Difference]: Start difference. First operand 77413 states and 91539 transitions. Second operand has 3 states, 3 states have (on average 175.33333333333334) internal successors, (526), 3 states have internal predecessors, (526), 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) [2021-11-02 22:15:00,836 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:15:00,836 INFO L93 Difference]: Finished difference Result 208111 states and 248507 transitions. [2021-11-02 22:15:00,837 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-02 22:15:00,837 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 175.33333333333334) internal successors, (526), 3 states have internal predecessors, (526), 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 743 [2021-11-02 22:15:00,839 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:15:01,032 INFO L225 Difference]: With dead ends: 208111 [2021-11-02 22:15:01,032 INFO L226 Difference]: Without dead ends: 133430 [2021-11-02 22:15:01,084 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 748 GetRequests, 742 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-11-02 22:15:01,220 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133430 states. [2021-11-02 22:15:03,128 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133430 to 122473. [2021-11-02 22:15:03,199 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 122473 states, 122472 states have (on average 1.1725210660395846) internal successors, (143601), 122472 states have internal predecessors, (143601), 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) [2021-11-02 22:15:03,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122473 states to 122473 states and 143601 transitions. [2021-11-02 22:15:03,386 INFO L78 Accepts]: Start accepts. Automaton has 122473 states and 143601 transitions. Word has length 743 [2021-11-02 22:15:03,387 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:15:03,387 INFO L470 AbstractCegarLoop]: Abstraction has 122473 states and 143601 transitions. [2021-11-02 22:15:03,388 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 175.33333333333334) internal successors, (526), 3 states have internal predecessors, (526), 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) [2021-11-02 22:15:03,388 INFO L276 IsEmpty]: Start isEmpty. Operand 122473 states and 143601 transitions. [2021-11-02 22:15:03,412 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 990 [2021-11-02 22:15:03,412 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:15:03,414 INFO L513 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:15:03,463 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef3ae282-3b4f-4528-bdd5-55551804fe0c/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-02 22:15:03,628 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef3ae282-3b4f-4528-bdd5-55551804fe0c/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:15:03,629 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:15:03,629 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:15:03,630 INFO L85 PathProgramCache]: Analyzing trace with hash -723003825, now seen corresponding path program 1 times [2021-11-02 22:15:03,630 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:15:03,630 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [531836644] [2021-11-02 22:15:03,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:15:03,631 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:15:03,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:15:04,809 INFO L134 CoverageAnalysis]: Checked inductivity of 934 backedges. 531 proven. 0 refuted. 0 times theorem prover too weak. 403 trivial. 0 not checked. [2021-11-02 22:15:04,810 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:15:04,810 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [531836644] [2021-11-02 22:15:04,810 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [531836644] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 22:15:04,813 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 22:15:04,813 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-02 22:15:04,814 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [932404389] [2021-11-02 22:15:04,820 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-02 22:15:04,820 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:15:04,821 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-02 22:15:04,821 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-02 22:15:04,822 INFO L87 Difference]: Start difference. First operand 122473 states and 143601 transitions. Second operand has 3 states, 3 states have (on average 208.0) internal successors, (624), 2 states have internal predecessors, (624), 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) [2021-11-02 22:15:14,539 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:15:14,539 INFO L93 Difference]: Finished difference Result 276354 states and 325567 transitions. [2021-11-02 22:15:14,540 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-02 22:15:14,540 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 208.0) internal successors, (624), 2 states have internal predecessors, (624), 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 989 [2021-11-02 22:15:14,541 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:15:14,743 INFO L225 Difference]: With dead ends: 276354 [2021-11-02 22:15:14,743 INFO L226 Difference]: Without dead ends: 156613 [2021-11-02 22:15:14,790 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-02 22:15:14,940 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156613 states. [2021-11-02 22:15:17,094 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156613 to 153858. [2021-11-02 22:15:17,199 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 153858 states, 153857 states have (on average 1.1547995866291427) internal successors, (177674), 153857 states have internal predecessors, (177674), 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) [2021-11-02 22:15:17,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153858 states to 153858 states and 177674 transitions. [2021-11-02 22:15:17,577 INFO L78 Accepts]: Start accepts. Automaton has 153858 states and 177674 transitions. Word has length 989 [2021-11-02 22:15:17,578 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:15:17,578 INFO L470 AbstractCegarLoop]: Abstraction has 153858 states and 177674 transitions. [2021-11-02 22:15:17,579 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 208.0) internal successors, (624), 2 states have internal predecessors, (624), 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) [2021-11-02 22:15:17,579 INFO L276 IsEmpty]: Start isEmpty. Operand 153858 states and 177674 transitions. [2021-11-02 22:15:17,609 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1024 [2021-11-02 22:15:17,609 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:15:17,610 INFO L513 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:15:17,611 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-11-02 22:15:17,611 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:15:17,612 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:15:17,612 INFO L85 PathProgramCache]: Analyzing trace with hash 616514628, now seen corresponding path program 1 times [2021-11-02 22:15:17,612 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:15:17,613 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1971690784] [2021-11-02 22:15:17,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:15:17,613 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:15:17,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:15:18,370 INFO L134 CoverageAnalysis]: Checked inductivity of 1005 backedges. 761 proven. 0 refuted. 0 times theorem prover too weak. 244 trivial. 0 not checked. [2021-11-02 22:15:18,371 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:15:18,371 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1971690784] [2021-11-02 22:15:18,371 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1971690784] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 22:15:18,371 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 22:15:18,372 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-02 22:15:18,372 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1440901470] [2021-11-02 22:15:18,374 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-02 22:15:18,375 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:15:18,375 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-02 22:15:18,376 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-02 22:15:18,376 INFO L87 Difference]: Start difference. First operand 153858 states and 177674 transitions. Second operand has 4 states, 4 states have (on average 195.25) internal successors, (781), 4 states have internal predecessors, (781), 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) [2021-11-02 22:15:38,309 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:15:38,309 INFO L93 Difference]: Finished difference Result 482748 states and 564874 transitions. [2021-11-02 22:15:38,310 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-02 22:15:38,310 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 195.25) internal successors, (781), 4 states have internal predecessors, (781), 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 1023 [2021-11-02 22:15:38,311 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:15:38,801 INFO L225 Difference]: With dead ends: 482748 [2021-11-02 22:15:38,801 INFO L226 Difference]: Without dead ends: 331622 [2021-11-02 22:15:38,887 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-02 22:15:39,213 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 331622 states. [2021-11-02 22:15:43,472 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 331622 to 323269. [2021-11-02 22:15:44,298 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 323269 states, 323268 states have (on average 1.1486846826781494) internal successors, (371333), 323268 states have internal predecessors, (371333), 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) [2021-11-02 22:15:45,047 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 323269 states to 323269 states and 371333 transitions. [2021-11-02 22:15:45,047 INFO L78 Accepts]: Start accepts. Automaton has 323269 states and 371333 transitions. Word has length 1023 [2021-11-02 22:15:45,048 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:15:45,048 INFO L470 AbstractCegarLoop]: Abstraction has 323269 states and 371333 transitions. [2021-11-02 22:15:45,049 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 195.25) internal successors, (781), 4 states have internal predecessors, (781), 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) [2021-11-02 22:15:45,049 INFO L276 IsEmpty]: Start isEmpty. Operand 323269 states and 371333 transitions. [2021-11-02 22:15:45,071 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1033 [2021-11-02 22:15:45,071 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:15:45,073 INFO L513 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:15:45,073 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-11-02 22:15:45,073 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:15:45,074 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:15:45,074 INFO L85 PathProgramCache]: Analyzing trace with hash -1633888293, now seen corresponding path program 1 times [2021-11-02 22:15:45,074 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:15:45,075 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1487062410] [2021-11-02 22:15:45,075 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:15:45,075 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:15:45,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:15:46,419 INFO L134 CoverageAnalysis]: Checked inductivity of 1032 backedges. 357 proven. 279 refuted. 0 times theorem prover too weak. 396 trivial. 0 not checked. [2021-11-02 22:15:46,419 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:15:46,419 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1487062410] [2021-11-02 22:15:46,420 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1487062410] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:15:46,420 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [366785833] [2021-11-02 22:15:46,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:15:46,421 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:15:46,421 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef3ae282-3b4f-4528-bdd5-55551804fe0c/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 22:15:46,437 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef3ae282-3b4f-4528-bdd5-55551804fe0c/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 22:15:46,512 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef3ae282-3b4f-4528-bdd5-55551804fe0c/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-02 22:15:47,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:15:47,127 INFO L263 TraceCheckSpWp]: Trace formula consists of 1209 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-02 22:15:47,153 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:15:49,810 INFO L134 CoverageAnalysis]: Checked inductivity of 1032 backedges. 139 proven. 0 refuted. 0 times theorem prover too weak. 893 trivial. 0 not checked. [2021-11-02 22:15:49,811 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [366785833] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 22:15:49,811 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-11-02 22:15:49,812 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2021-11-02 22:15:49,813 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1395009166] [2021-11-02 22:15:49,818 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-02 22:15:49,818 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:15:49,819 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-02 22:15:49,820 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-02 22:15:49,820 INFO L87 Difference]: Start difference. First operand 323269 states and 371333 transitions. Second operand has 3 states, 3 states have (on average 176.66666666666666) internal successors, (530), 3 states have internal predecessors, (530), 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) [2021-11-02 22:16:01,998 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:16:01,999 INFO L93 Difference]: Finished difference Result 706608 states and 817401 transitions. [2021-11-02 22:16:01,999 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-02 22:16:02,000 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 176.66666666666666) internal successors, (530), 3 states have internal predecessors, (530), 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 1032 [2021-11-02 22:16:02,001 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:16:02,693 INFO L225 Difference]: With dead ends: 706608 [2021-11-02 22:16:02,694 INFO L226 Difference]: Without dead ends: 386071 [2021-11-02 22:16:02,873 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 1036 GetRequests, 1032 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-02 22:16:03,249 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 386071 states. [2021-11-02 22:16:08,690 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 386071 to 375139. [2021-11-02 22:16:08,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 375139 states, 375138 states have (on average 1.1582217743870256) internal successors, (434493), 375138 states have internal predecessors, (434493), 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)