./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/eca-rers2012/Problem13_label23.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version e04fb08f Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58ae58e8-b7c6-41d0-9a61-051d81487cd8/bin/uautomizer-tPACEb0tL8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58ae58e8-b7c6-41d0-9a61-051d81487cd8/bin/uautomizer-tPACEb0tL8/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58ae58e8-b7c6-41d0-9a61-051d81487cd8/bin/uautomizer-tPACEb0tL8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58ae58e8-b7c6-41d0-9a61-051d81487cd8/bin/uautomizer-tPACEb0tL8/config/AutomizerReach.xml -i ../../sv-benchmarks/c/eca-rers2012/Problem13_label23.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58ae58e8-b7c6-41d0-9a61-051d81487cd8/bin/uautomizer-tPACEb0tL8/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58ae58e8-b7c6-41d0-9a61-051d81487cd8/bin/uautomizer-tPACEb0tL8 --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 adf96f71bf2a13ae5fd22bce01b9c481e5a9d21572a73a17cea58c8fcaecb44e --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-e04fb08 [2022-11-16 11:11:56,750 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-16 11:11:56,752 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-16 11:11:56,789 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-16 11:11:56,791 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-16 11:11:56,795 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-16 11:11:56,797 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-16 11:11:56,800 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-16 11:11:56,805 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-16 11:11:56,807 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-16 11:11:56,809 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-16 11:11:56,811 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-16 11:11:56,813 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-16 11:11:56,817 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-16 11:11:56,819 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-16 11:11:56,821 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-16 11:11:56,824 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-16 11:11:56,831 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-16 11:11:56,833 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-16 11:11:56,835 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-16 11:11:56,843 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-16 11:11:56,844 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-16 11:11:56,845 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-16 11:11:56,846 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-16 11:11:56,850 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-16 11:11:56,855 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-16 11:11:56,855 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-16 11:11:56,857 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-16 11:11:56,857 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-16 11:11:56,859 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-16 11:11:56,860 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-16 11:11:56,861 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-16 11:11:56,862 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-16 11:11:56,863 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-16 11:11:56,864 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-16 11:11:56,864 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-16 11:11:56,865 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-16 11:11:56,866 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-16 11:11:56,866 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-16 11:11:56,867 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-16 11:11:56,867 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-16 11:11:56,868 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58ae58e8-b7c6-41d0-9a61-051d81487cd8/bin/uautomizer-tPACEb0tL8/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-11-16 11:11:56,892 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-16 11:11:56,892 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-16 11:11:56,893 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-16 11:11:56,893 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-16 11:11:56,894 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-16 11:11:56,894 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-16 11:11:56,895 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-16 11:11:56,895 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-16 11:11:56,895 INFO L138 SettingsManager]: * Use SBE=true [2022-11-16 11:11:56,895 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-16 11:11:56,896 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-16 11:11:56,896 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-16 11:11:56,896 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-16 11:11:56,896 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-16 11:11:56,896 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-16 11:11:56,897 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-16 11:11:56,897 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-16 11:11:56,897 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-16 11:11:56,897 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-16 11:11:56,897 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-16 11:11:56,898 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-16 11:11:56,898 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-16 11:11:56,898 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-16 11:11:56,898 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-16 11:11:56,899 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-16 11:11:56,899 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-16 11:11:56,899 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-16 11:11:56,899 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-16 11:11:56,900 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-16 11:11:56,900 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-16 11:11:56,900 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-11-16 11:11:56,900 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-11-16 11:11:56,900 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-16 11:11:56,901 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_58ae58e8-b7c6-41d0-9a61-051d81487cd8/bin/uautomizer-tPACEb0tL8/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58ae58e8-b7c6-41d0-9a61-051d81487cd8/bin/uautomizer-tPACEb0tL8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> adf96f71bf2a13ae5fd22bce01b9c481e5a9d21572a73a17cea58c8fcaecb44e [2022-11-16 11:11:57,189 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-16 11:11:57,226 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-16 11:11:57,229 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-16 11:11:57,230 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-16 11:11:57,231 INFO L275 PluginConnector]: CDTParser initialized [2022-11-16 11:11:57,232 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58ae58e8-b7c6-41d0-9a61-051d81487cd8/bin/uautomizer-tPACEb0tL8/../../sv-benchmarks/c/eca-rers2012/Problem13_label23.c [2022-11-16 11:11:57,323 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58ae58e8-b7c6-41d0-9a61-051d81487cd8/bin/uautomizer-tPACEb0tL8/data/0c876c047/a15949ccdea8454a8168c6d7abb64acf/FLAGde8f9f643 [2022-11-16 11:11:58,188 INFO L306 CDTParser]: Found 1 translation units. [2022-11-16 11:11:58,189 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58ae58e8-b7c6-41d0-9a61-051d81487cd8/sv-benchmarks/c/eca-rers2012/Problem13_label23.c [2022-11-16 11:11:58,219 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58ae58e8-b7c6-41d0-9a61-051d81487cd8/bin/uautomizer-tPACEb0tL8/data/0c876c047/a15949ccdea8454a8168c6d7abb64acf/FLAGde8f9f643 [2022-11-16 11:11:58,692 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58ae58e8-b7c6-41d0-9a61-051d81487cd8/bin/uautomizer-tPACEb0tL8/data/0c876c047/a15949ccdea8454a8168c6d7abb64acf [2022-11-16 11:11:58,695 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-16 11:11:58,697 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-16 11:11:58,701 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-16 11:11:58,701 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-16 11:11:58,705 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-16 11:11:58,706 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.11 11:11:58" (1/1) ... [2022-11-16 11:11:58,707 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3dc93a5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:11:58, skipping insertion in model container [2022-11-16 11:11:58,708 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.11 11:11:58" (1/1) ... [2022-11-16 11:11:58,734 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-16 11:11:58,899 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-16 11:11:59,203 WARN L229 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_58ae58e8-b7c6-41d0-9a61-051d81487cd8/sv-benchmarks/c/eca-rers2012/Problem13_label23.c[2192,2205] [2022-11-16 11:12:00,407 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-16 11:12:00,428 INFO L203 MainTranslator]: Completed pre-run [2022-11-16 11:12:00,458 WARN L229 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_58ae58e8-b7c6-41d0-9a61-051d81487cd8/sv-benchmarks/c/eca-rers2012/Problem13_label23.c[2192,2205] [2022-11-16 11:12:01,270 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-16 11:12:01,300 INFO L208 MainTranslator]: Completed translation [2022-11-16 11:12:01,301 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:12:01 WrapperNode [2022-11-16 11:12:01,301 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-16 11:12:01,302 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-16 11:12:01,303 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-16 11:12:01,303 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-16 11:12:01,311 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:12:01" (1/1) ... [2022-11-16 11:12:01,379 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:12:01" (1/1) ... [2022-11-16 11:12:01,897 INFO L138 Inliner]: procedures = 17, calls = 11, calls flagged for inlining = 6, calls inlined = 6, statements flattened = 5583 [2022-11-16 11:12:01,898 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-16 11:12:02,010 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-16 11:12:02,011 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-16 11:12:02,011 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-16 11:12:02,020 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:12:01" (1/1) ... [2022-11-16 11:12:02,020 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:12:01" (1/1) ... [2022-11-16 11:12:02,158 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:12:01" (1/1) ... [2022-11-16 11:12:02,164 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:12:01" (1/1) ... [2022-11-16 11:12:02,526 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:12:01" (1/1) ... [2022-11-16 11:12:02,604 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:12:01" (1/1) ... [2022-11-16 11:12:02,652 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:12:01" (1/1) ... [2022-11-16 11:12:02,665 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:12:01" (1/1) ... [2022-11-16 11:12:02,763 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-16 11:12:02,766 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-16 11:12:02,766 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-16 11:12:02,767 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-16 11:12:02,768 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:12:01" (1/1) ... [2022-11-16 11:12:02,774 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-16 11:12:02,784 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58ae58e8-b7c6-41d0-9a61-051d81487cd8/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:12:02,797 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58ae58e8-b7c6-41d0-9a61-051d81487cd8/bin/uautomizer-tPACEb0tL8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-16 11:12:02,823 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58ae58e8-b7c6-41d0-9a61-051d81487cd8/bin/uautomizer-tPACEb0tL8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-16 11:12:02,842 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-16 11:12:02,843 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-16 11:12:02,843 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-16 11:12:02,843 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-16 11:12:02,921 INFO L235 CfgBuilder]: Building ICFG [2022-11-16 11:12:02,923 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-16 11:12:09,726 INFO L276 CfgBuilder]: Performing block encoding [2022-11-16 11:12:09,748 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-16 11:12:09,748 INFO L300 CfgBuilder]: Removed 1 assume(true) statements. [2022-11-16 11:12:09,752 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.11 11:12:09 BoogieIcfgContainer [2022-11-16 11:12:09,752 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-16 11:12:09,755 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-16 11:12:09,756 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-16 11:12:09,760 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-16 11:12:09,760 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 16.11 11:11:58" (1/3) ... [2022-11-16 11:12:09,762 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@775e95d7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.11 11:12:09, skipping insertion in model container [2022-11-16 11:12:09,762 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:12:01" (2/3) ... [2022-11-16 11:12:09,763 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@775e95d7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.11 11:12:09, skipping insertion in model container [2022-11-16 11:12:09,763 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.11 11:12:09" (3/3) ... [2022-11-16 11:12:09,764 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem13_label23.c [2022-11-16 11:12:09,785 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-16 11:12:09,785 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-16 11:12:09,886 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-16 11:12:09,896 INFO L357 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, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@4a39a53c, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-16 11:12:09,896 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-16 11:12:09,906 INFO L276 IsEmpty]: Start isEmpty. Operand has 1098 states, 1096 states have (on average 1.8275547445255473) internal successors, (2003), 1097 states have internal predecessors, (2003), 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) [2022-11-16 11:12:09,913 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-16 11:12:09,914 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:12:09,915 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:12:09,916 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 11:12:09,923 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:12:09,923 INFO L85 PathProgramCache]: Analyzing trace with hash -461255479, now seen corresponding path program 1 times [2022-11-16 11:12:09,934 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:12:09,934 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1835144229] [2022-11-16 11:12:09,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:12:09,935 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:12:10,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:12:10,189 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:12:10,189 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:12:10,189 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1835144229] [2022-11-16 11:12:10,190 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1835144229] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:12:10,190 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:12:10,191 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-16 11:12:10,192 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1974257673] [2022-11-16 11:12:10,193 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:12:10,197 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 11:12:10,197 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:12:10,223 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 11:12:10,224 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 11:12:10,229 INFO L87 Difference]: Start difference. First operand has 1098 states, 1096 states have (on average 1.8275547445255473) internal successors, (2003), 1097 states have internal predecessors, (2003), 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 4.333333333333333) internal successors, (13), 2 states have internal predecessors, (13), 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) [2022-11-16 11:12:17,029 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:12:17,029 INFO L93 Difference]: Finished difference Result 3160 states and 5843 transitions. [2022-11-16 11:12:17,030 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 11:12:17,031 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 2 states have internal predecessors, (13), 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 13 [2022-11-16 11:12:17,032 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:12:17,064 INFO L225 Difference]: With dead ends: 3160 [2022-11-16 11:12:17,067 INFO L226 Difference]: Without dead ends: 1983 [2022-11-16 11:12:17,082 INFO L412 NwaCegarLoop]: 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 [2022-11-16 11:12:17,088 INFO L413 NwaCegarLoop]: 243 mSDtfsCounter, 1090 mSDsluCounter, 97 mSDsCounter, 0 mSdLazyCounter, 3030 mSolverCounterSat, 974 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1090 SdHoareTripleChecker+Valid, 340 SdHoareTripleChecker+Invalid, 4004 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 974 IncrementalHoareTripleChecker+Valid, 3030 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.6s IncrementalHoareTripleChecker+Time [2022-11-16 11:12:17,089 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1090 Valid, 340 Invalid, 4004 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [974 Valid, 3030 Invalid, 0 Unknown, 0 Unchecked, 6.6s Time] [2022-11-16 11:12:17,111 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1983 states. [2022-11-16 11:12:17,210 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1983 to 1930. [2022-11-16 11:12:17,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1930 states, 1929 states have (on average 1.7973043027475375) internal successors, (3467), 1929 states have internal predecessors, (3467), 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) [2022-11-16 11:12:17,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1930 states to 1930 states and 3467 transitions. [2022-11-16 11:12:17,225 INFO L78 Accepts]: Start accepts. Automaton has 1930 states and 3467 transitions. Word has length 13 [2022-11-16 11:12:17,226 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:12:17,226 INFO L495 AbstractCegarLoop]: Abstraction has 1930 states and 3467 transitions. [2022-11-16 11:12:17,227 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 2 states have internal predecessors, (13), 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) [2022-11-16 11:12:17,227 INFO L276 IsEmpty]: Start isEmpty. Operand 1930 states and 3467 transitions. [2022-11-16 11:12:17,229 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2022-11-16 11:12:17,229 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:12:17,230 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:12:17,230 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-16 11:12:17,231 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 11:12:17,231 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:12:17,232 INFO L85 PathProgramCache]: Analyzing trace with hash 365234242, now seen corresponding path program 1 times [2022-11-16 11:12:17,232 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:12:17,232 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1766111226] [2022-11-16 11:12:17,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:12:17,233 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:12:17,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:12:17,502 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:12:17,502 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:12:17,502 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1766111226] [2022-11-16 11:12:17,503 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1766111226] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:12:17,503 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:12:17,503 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-16 11:12:17,503 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [450718205] [2022-11-16 11:12:17,504 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:12:17,505 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 11:12:17,505 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:12:17,506 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 11:12:17,506 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 11:12:17,506 INFO L87 Difference]: Start difference. First operand 1930 states and 3467 transitions. Second operand has 3 states, 3 states have (on average 26.0) internal successors, (78), 2 states have internal predecessors, (78), 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) [2022-11-16 11:12:22,327 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:12:22,327 INFO L93 Difference]: Finished difference Result 5456 states and 9917 transitions. [2022-11-16 11:12:22,327 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 11:12:22,328 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 26.0) internal successors, (78), 2 states have internal predecessors, (78), 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 78 [2022-11-16 11:12:22,328 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:12:22,342 INFO L225 Difference]: With dead ends: 5456 [2022-11-16 11:12:22,342 INFO L226 Difference]: Without dead ends: 3528 [2022-11-16 11:12:22,345 INFO L412 NwaCegarLoop]: 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 [2022-11-16 11:12:22,347 INFO L413 NwaCegarLoop]: 855 mSDtfsCounter, 923 mSDsluCounter, 152 mSDsCounter, 0 mSdLazyCounter, 2309 mSolverCounterSat, 878 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 923 SdHoareTripleChecker+Valid, 1007 SdHoareTripleChecker+Invalid, 3187 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 878 IncrementalHoareTripleChecker+Valid, 2309 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.7s IncrementalHoareTripleChecker+Time [2022-11-16 11:12:22,347 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [923 Valid, 1007 Invalid, 3187 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [878 Valid, 2309 Invalid, 0 Unknown, 0 Unchecked, 4.7s Time] [2022-11-16 11:12:22,352 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3528 states. [2022-11-16 11:12:22,402 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3528 to 3526. [2022-11-16 11:12:22,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3526 states, 3525 states have (on average 1.5670921985815602) internal successors, (5524), 3525 states have internal predecessors, (5524), 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) [2022-11-16 11:12:22,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3526 states to 3526 states and 5524 transitions. [2022-11-16 11:12:22,418 INFO L78 Accepts]: Start accepts. Automaton has 3526 states and 5524 transitions. Word has length 78 [2022-11-16 11:12:22,418 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:12:22,418 INFO L495 AbstractCegarLoop]: Abstraction has 3526 states and 5524 transitions. [2022-11-16 11:12:22,419 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 26.0) internal successors, (78), 2 states have internal predecessors, (78), 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) [2022-11-16 11:12:22,419 INFO L276 IsEmpty]: Start isEmpty. Operand 3526 states and 5524 transitions. [2022-11-16 11:12:22,421 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2022-11-16 11:12:22,421 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:12:22,421 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:12:22,422 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-16 11:12:22,422 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 11:12:22,422 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:12:22,423 INFO L85 PathProgramCache]: Analyzing trace with hash 1133112465, now seen corresponding path program 1 times [2022-11-16 11:12:22,423 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:12:22,423 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1512240244] [2022-11-16 11:12:22,423 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:12:22,424 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:12:22,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:12:22,621 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:12:22,621 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:12:22,622 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1512240244] [2022-11-16 11:12:22,622 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1512240244] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:12:22,622 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:12:22,622 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-16 11:12:22,623 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [894213934] [2022-11-16 11:12:22,623 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:12:22,623 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 11:12:22,623 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:12:22,624 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 11:12:22,624 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 11:12:22,624 INFO L87 Difference]: Start difference. First operand 3526 states and 5524 transitions. Second operand has 3 states, 3 states have (on average 28.0) internal successors, (84), 2 states have internal predecessors, (84), 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) [2022-11-16 11:12:27,353 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:12:27,353 INFO L93 Difference]: Finished difference Result 10232 states and 16097 transitions. [2022-11-16 11:12:27,353 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 11:12:27,354 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 28.0) internal successors, (84), 2 states have internal predecessors, (84), 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 84 [2022-11-16 11:12:27,354 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:12:27,382 INFO L225 Difference]: With dead ends: 10232 [2022-11-16 11:12:27,382 INFO L226 Difference]: Without dead ends: 6708 [2022-11-16 11:12:27,388 INFO L412 NwaCegarLoop]: 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 [2022-11-16 11:12:27,394 INFO L413 NwaCegarLoop]: 717 mSDtfsCounter, 972 mSDsluCounter, 133 mSDsCounter, 0 mSdLazyCounter, 2534 mSolverCounterSat, 775 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 972 SdHoareTripleChecker+Valid, 850 SdHoareTripleChecker+Invalid, 3309 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 775 IncrementalHoareTripleChecker+Valid, 2534 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.6s IncrementalHoareTripleChecker+Time [2022-11-16 11:12:27,396 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [972 Valid, 850 Invalid, 3309 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [775 Valid, 2534 Invalid, 0 Unknown, 0 Unchecked, 4.6s Time] [2022-11-16 11:12:27,403 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6708 states. [2022-11-16 11:12:27,515 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6708 to 6700. [2022-11-16 11:12:27,527 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6700 states, 6699 states have (on average 1.413046723391551) internal successors, (9466), 6699 states have internal predecessors, (9466), 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) [2022-11-16 11:12:27,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6700 states to 6700 states and 9466 transitions. [2022-11-16 11:12:27,540 INFO L78 Accepts]: Start accepts. Automaton has 6700 states and 9466 transitions. Word has length 84 [2022-11-16 11:12:27,541 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:12:27,541 INFO L495 AbstractCegarLoop]: Abstraction has 6700 states and 9466 transitions. [2022-11-16 11:12:27,541 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 28.0) internal successors, (84), 2 states have internal predecessors, (84), 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) [2022-11-16 11:12:27,542 INFO L276 IsEmpty]: Start isEmpty. Operand 6700 states and 9466 transitions. [2022-11-16 11:12:27,543 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2022-11-16 11:12:27,544 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:12:27,544 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:12:27,544 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-16 11:12:27,544 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 11:12:27,545 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:12:27,545 INFO L85 PathProgramCache]: Analyzing trace with hash 659309084, now seen corresponding path program 1 times [2022-11-16 11:12:27,545 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:12:27,546 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1431594813] [2022-11-16 11:12:27,546 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:12:27,546 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:12:27,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:12:27,795 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:12:27,796 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:12:27,796 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1431594813] [2022-11-16 11:12:27,796 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1431594813] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:12:27,796 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:12:27,796 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-16 11:12:27,797 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2086683088] [2022-11-16 11:12:27,797 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:12:27,797 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 11:12:27,798 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:12:27,798 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 11:12:27,798 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 11:12:27,799 INFO L87 Difference]: Start difference. First operand 6700 states and 9466 transitions. Second operand has 3 states, 3 states have (on average 38.0) internal successors, (114), 2 states have internal predecessors, (114), 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) [2022-11-16 11:12:33,233 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:12:33,234 INFO L93 Difference]: Finished difference Result 17443 states and 24479 transitions. [2022-11-16 11:12:33,234 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 11:12:33,234 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 38.0) internal successors, (114), 2 states have internal predecessors, (114), 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 114 [2022-11-16 11:12:33,235 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:12:33,270 INFO L225 Difference]: With dead ends: 17443 [2022-11-16 11:12:33,271 INFO L226 Difference]: Without dead ends: 10745 [2022-11-16 11:12:33,280 INFO L412 NwaCegarLoop]: 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 [2022-11-16 11:12:33,281 INFO L413 NwaCegarLoop]: 834 mSDtfsCounter, 844 mSDsluCounter, 131 mSDsCounter, 0 mSdLazyCounter, 3291 mSolverCounterSat, 450 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 844 SdHoareTripleChecker+Valid, 965 SdHoareTripleChecker+Invalid, 3741 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 450 IncrementalHoareTripleChecker+Valid, 3291 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.2s IncrementalHoareTripleChecker+Time [2022-11-16 11:12:33,282 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [844 Valid, 965 Invalid, 3741 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [450 Valid, 3291 Invalid, 0 Unknown, 0 Unchecked, 5.2s Time] [2022-11-16 11:12:33,295 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10745 states. [2022-11-16 11:12:33,493 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10745 to 10669. [2022-11-16 11:12:33,510 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10669 states, 10668 states have (on average 1.3562992125984252) internal successors, (14469), 10668 states have internal predecessors, (14469), 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) [2022-11-16 11:12:33,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10669 states to 10669 states and 14469 transitions. [2022-11-16 11:12:33,529 INFO L78 Accepts]: Start accepts. Automaton has 10669 states and 14469 transitions. Word has length 114 [2022-11-16 11:12:33,530 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:12:33,531 INFO L495 AbstractCegarLoop]: Abstraction has 10669 states and 14469 transitions. [2022-11-16 11:12:33,531 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 38.0) internal successors, (114), 2 states have internal predecessors, (114), 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) [2022-11-16 11:12:33,531 INFO L276 IsEmpty]: Start isEmpty. Operand 10669 states and 14469 transitions. [2022-11-16 11:12:33,543 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2022-11-16 11:12:33,545 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:12:33,546 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:12:33,546 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-16 11:12:33,546 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 11:12:33,547 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:12:33,547 INFO L85 PathProgramCache]: Analyzing trace with hash -606577547, now seen corresponding path program 1 times [2022-11-16 11:12:33,547 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:12:33,547 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1264779025] [2022-11-16 11:12:33,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:12:33,548 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:12:33,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:12:33,753 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:12:33,754 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:12:33,754 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1264779025] [2022-11-16 11:12:33,754 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1264779025] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:12:33,754 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:12:33,755 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-16 11:12:33,755 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1891150945] [2022-11-16 11:12:33,755 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:12:33,755 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 11:12:33,756 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:12:33,756 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 11:12:33,756 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 11:12:33,757 INFO L87 Difference]: Start difference. First operand 10669 states and 14469 transitions. Second operand has 3 states, 3 states have (on average 41.333333333333336) internal successors, (124), 3 states have internal predecessors, (124), 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) [2022-11-16 11:12:38,452 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:12:38,453 INFO L93 Difference]: Finished difference Result 30031 states and 41242 transitions. [2022-11-16 11:12:38,458 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 11:12:38,459 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 41.333333333333336) internal successors, (124), 3 states have internal predecessors, (124), 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 124 [2022-11-16 11:12:38,459 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:12:38,509 INFO L225 Difference]: With dead ends: 30031 [2022-11-16 11:12:38,509 INFO L226 Difference]: Without dead ends: 20151 [2022-11-16 11:12:38,519 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 11:12:38,520 INFO L413 NwaCegarLoop]: 1010 mSDtfsCounter, 853 mSDsluCounter, 150 mSDsCounter, 0 mSdLazyCounter, 2484 mSolverCounterSat, 792 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 853 SdHoareTripleChecker+Valid, 1160 SdHoareTripleChecker+Invalid, 3276 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 792 IncrementalHoareTripleChecker+Valid, 2484 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.5s IncrementalHoareTripleChecker+Time [2022-11-16 11:12:38,520 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [853 Valid, 1160 Invalid, 3276 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [792 Valid, 2484 Invalid, 0 Unknown, 0 Unchecked, 4.5s Time] [2022-11-16 11:12:38,541 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20151 states. [2022-11-16 11:12:38,799 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20151 to 18550. [2022-11-16 11:12:38,836 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18550 states, 18549 states have (on average 1.252466440239366) internal successors, (23232), 18549 states have internal predecessors, (23232), 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) [2022-11-16 11:12:38,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18550 states to 18550 states and 23232 transitions. [2022-11-16 11:12:38,874 INFO L78 Accepts]: Start accepts. Automaton has 18550 states and 23232 transitions. Word has length 124 [2022-11-16 11:12:38,876 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:12:38,876 INFO L495 AbstractCegarLoop]: Abstraction has 18550 states and 23232 transitions. [2022-11-16 11:12:38,877 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 41.333333333333336) internal successors, (124), 3 states have internal predecessors, (124), 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) [2022-11-16 11:12:38,881 INFO L276 IsEmpty]: Start isEmpty. Operand 18550 states and 23232 transitions. [2022-11-16 11:12:38,882 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2022-11-16 11:12:38,882 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:12:38,882 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:12:38,883 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-16 11:12:38,885 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 11:12:38,886 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:12:38,886 INFO L85 PathProgramCache]: Analyzing trace with hash 889611492, now seen corresponding path program 1 times [2022-11-16 11:12:38,887 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:12:38,892 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1845980814] [2022-11-16 11:12:38,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:12:38,893 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:12:38,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:12:39,136 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:12:39,136 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:12:39,137 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1845980814] [2022-11-16 11:12:39,137 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1845980814] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:12:39,137 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:12:39,137 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-16 11:12:39,137 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [413173182] [2022-11-16 11:12:39,138 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:12:39,139 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 11:12:39,139 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:12:39,140 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 11:12:39,140 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 11:12:39,140 INFO L87 Difference]: Start difference. First operand 18550 states and 23232 transitions. Second operand has 3 states, 3 states have (on average 43.0) internal successors, (129), 2 states have internal predecessors, (129), 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) [2022-11-16 11:12:43,992 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:12:43,992 INFO L93 Difference]: Finished difference Result 44989 states and 55638 transitions. [2022-11-16 11:12:43,994 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 11:12:43,995 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 43.0) internal successors, (129), 2 states have internal predecessors, (129), 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 129 [2022-11-16 11:12:43,995 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:12:44,049 INFO L225 Difference]: With dead ends: 44989 [2022-11-16 11:12:44,049 INFO L226 Difference]: Without dead ends: 26441 [2022-11-16 11:12:44,062 INFO L412 NwaCegarLoop]: 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 [2022-11-16 11:12:44,063 INFO L413 NwaCegarLoop]: 1030 mSDtfsCounter, 730 mSDsluCounter, 184 mSDsCounter, 0 mSdLazyCounter, 2714 mSolverCounterSat, 181 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 730 SdHoareTripleChecker+Valid, 1214 SdHoareTripleChecker+Invalid, 2895 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 181 IncrementalHoareTripleChecker+Valid, 2714 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.6s IncrementalHoareTripleChecker+Time [2022-11-16 11:12:44,063 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [730 Valid, 1214 Invalid, 2895 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [181 Valid, 2714 Invalid, 0 Unknown, 0 Unchecked, 4.6s Time] [2022-11-16 11:12:44,094 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26441 states. [2022-11-16 11:12:44,438 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26441 to 26434. [2022-11-16 11:12:44,473 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26434 states, 26433 states have (on average 1.2007717625695153) internal successors, (31740), 26433 states have internal predecessors, (31740), 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) [2022-11-16 11:12:44,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26434 states to 26434 states and 31740 transitions. [2022-11-16 11:12:44,514 INFO L78 Accepts]: Start accepts. Automaton has 26434 states and 31740 transitions. Word has length 129 [2022-11-16 11:12:44,514 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:12:44,514 INFO L495 AbstractCegarLoop]: Abstraction has 26434 states and 31740 transitions. [2022-11-16 11:12:44,515 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 43.0) internal successors, (129), 2 states have internal predecessors, (129), 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) [2022-11-16 11:12:44,515 INFO L276 IsEmpty]: Start isEmpty. Operand 26434 states and 31740 transitions. [2022-11-16 11:12:44,519 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 228 [2022-11-16 11:12:44,519 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:12:44,520 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:12:44,520 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-11-16 11:12:44,520 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 11:12:44,521 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:12:44,521 INFO L85 PathProgramCache]: Analyzing trace with hash -836746136, now seen corresponding path program 1 times [2022-11-16 11:12:44,521 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:12:44,521 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1615487323] [2022-11-16 11:12:44,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:12:44,522 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:12:44,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:12:44,746 INFO L134 CoverageAnalysis]: Checked inductivity of 109 backedges. 109 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:12:44,746 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:12:44,746 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1615487323] [2022-11-16 11:12:44,746 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1615487323] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:12:44,747 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:12:44,747 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-16 11:12:44,747 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1641016245] [2022-11-16 11:12:44,747 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:12:44,748 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 11:12:44,748 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:12:44,748 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 11:12:44,748 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 11:12:44,749 INFO L87 Difference]: Start difference. First operand 26434 states and 31740 transitions. Second operand has 3 states, 3 states have (on average 75.66666666666667) internal successors, (227), 3 states have internal predecessors, (227), 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) [2022-11-16 11:12:49,617 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:12:49,618 INFO L93 Difference]: Finished difference Result 72535 states and 87976 transitions. [2022-11-16 11:12:49,618 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 11:12:49,618 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 75.66666666666667) internal successors, (227), 3 states have internal predecessors, (227), 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 227 [2022-11-16 11:12:49,619 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:12:49,707 INFO L225 Difference]: With dead ends: 72535 [2022-11-16 11:12:49,707 INFO L226 Difference]: Without dead ends: 46103 [2022-11-16 11:12:49,728 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 11:12:49,730 INFO L413 NwaCegarLoop]: 1847 mSDtfsCounter, 840 mSDsluCounter, 137 mSDsCounter, 0 mSdLazyCounter, 2479 mSolverCounterSat, 806 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 840 SdHoareTripleChecker+Valid, 1984 SdHoareTripleChecker+Invalid, 3285 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 806 IncrementalHoareTripleChecker+Valid, 2479 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.5s IncrementalHoareTripleChecker+Time [2022-11-16 11:12:49,730 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [840 Valid, 1984 Invalid, 3285 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [806 Valid, 2479 Invalid, 0 Unknown, 0 Unchecked, 4.5s Time] [2022-11-16 11:12:49,778 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46103 states. [2022-11-16 11:12:50,221 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46103 to 42946. [2022-11-16 11:12:50,259 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42946 states, 42945 states have (on average 1.17205728257073) internal successors, (50334), 42945 states have internal predecessors, (50334), 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) [2022-11-16 11:12:50,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42946 states to 42946 states and 50334 transitions. [2022-11-16 11:12:50,318 INFO L78 Accepts]: Start accepts. Automaton has 42946 states and 50334 transitions. Word has length 227 [2022-11-16 11:12:50,319 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:12:50,319 INFO L495 AbstractCegarLoop]: Abstraction has 42946 states and 50334 transitions. [2022-11-16 11:12:50,319 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 75.66666666666667) internal successors, (227), 3 states have internal predecessors, (227), 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) [2022-11-16 11:12:50,320 INFO L276 IsEmpty]: Start isEmpty. Operand 42946 states and 50334 transitions. [2022-11-16 11:12:50,323 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 234 [2022-11-16 11:12:50,323 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:12:50,324 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:12:50,324 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-11-16 11:12:50,324 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 11:12:50,325 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:12:50,325 INFO L85 PathProgramCache]: Analyzing trace with hash -1380443233, now seen corresponding path program 1 times [2022-11-16 11:12:50,325 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:12:50,325 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1550110959] [2022-11-16 11:12:50,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:12:50,326 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:12:50,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:12:51,003 INFO L134 CoverageAnalysis]: Checked inductivity of 109 backedges. 98 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-16 11:12:51,003 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:12:51,004 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1550110959] [2022-11-16 11:12:51,004 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1550110959] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:12:51,004 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:12:51,004 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-16 11:12:51,004 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [76686835] [2022-11-16 11:12:51,005 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:12:51,005 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 11:12:51,005 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:12:51,006 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 11:12:51,006 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 11:12:51,006 INFO L87 Difference]: Start difference. First operand 42946 states and 50334 transitions. Second operand has 3 states, 3 states have (on average 74.33333333333333) internal successors, (223), 2 states have internal predecessors, (223), 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) [2022-11-16 11:12:55,276 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:12:55,276 INFO L93 Difference]: Finished difference Result 85103 states and 99869 transitions. [2022-11-16 11:12:55,276 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 11:12:55,276 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 74.33333333333333) internal successors, (223), 2 states have internal predecessors, (223), 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 233 [2022-11-16 11:12:55,277 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:12:55,348 INFO L225 Difference]: With dead ends: 85103 [2022-11-16 11:12:55,349 INFO L226 Difference]: Without dead ends: 42946 [2022-11-16 11:12:55,373 INFO L412 NwaCegarLoop]: 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 [2022-11-16 11:12:55,374 INFO L413 NwaCegarLoop]: 1064 mSDtfsCounter, 700 mSDsluCounter, 129 mSDsCounter, 0 mSdLazyCounter, 2501 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 700 SdHoareTripleChecker+Valid, 1193 SdHoareTripleChecker+Invalid, 2505 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 2501 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.9s IncrementalHoareTripleChecker+Time [2022-11-16 11:12:55,375 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [700 Valid, 1193 Invalid, 2505 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 2501 Invalid, 0 Unknown, 0 Unchecked, 3.9s Time] [2022-11-16 11:12:55,415 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42946 states. [2022-11-16 11:12:55,969 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42946 to 42946. [2022-11-16 11:12:55,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42946 states, 42945 states have (on average 1.1719408545814414) internal successors, (50329), 42945 states have internal predecessors, (50329), 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) [2022-11-16 11:12:56,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42946 states to 42946 states and 50329 transitions. [2022-11-16 11:12:56,059 INFO L78 Accepts]: Start accepts. Automaton has 42946 states and 50329 transitions. Word has length 233 [2022-11-16 11:12:56,060 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:12:56,060 INFO L495 AbstractCegarLoop]: Abstraction has 42946 states and 50329 transitions. [2022-11-16 11:12:56,060 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 74.33333333333333) internal successors, (223), 2 states have internal predecessors, (223), 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) [2022-11-16 11:12:56,060 INFO L276 IsEmpty]: Start isEmpty. Operand 42946 states and 50329 transitions. [2022-11-16 11:12:56,064 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 241 [2022-11-16 11:12:56,064 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:12:56,064 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:12:56,067 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-11-16 11:12:56,067 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 11:12:56,067 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:12:56,068 INFO L85 PathProgramCache]: Analyzing trace with hash 1208046358, now seen corresponding path program 1 times [2022-11-16 11:12:56,068 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:12:56,068 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2126137561] [2022-11-16 11:12:56,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:12:56,068 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:12:56,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:12:56,314 INFO L134 CoverageAnalysis]: Checked inductivity of 116 backedges. 116 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:12:56,314 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:12:56,314 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2126137561] [2022-11-16 11:12:56,314 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2126137561] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:12:56,315 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:12:56,315 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-16 11:12:56,315 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1925711667] [2022-11-16 11:12:56,315 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:12:56,316 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 11:12:56,316 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:12:56,317 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 11:12:56,317 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 11:12:56,317 INFO L87 Difference]: Start difference. First operand 42946 states and 50329 transitions. Second operand has 3 states, 3 states have (on average 80.0) internal successors, (240), 3 states have internal predecessors, (240), 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) [2022-11-16 11:13:01,194 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:13:01,194 INFO L93 Difference]: Finished difference Result 104790 states and 124853 transitions. [2022-11-16 11:13:01,195 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 11:13:01,195 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 80.0) internal successors, (240), 3 states have internal predecessors, (240), 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 240 [2022-11-16 11:13:01,195 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:13:01,483 INFO L225 Difference]: With dead ends: 104790 [2022-11-16 11:13:01,484 INFO L226 Difference]: Without dead ends: 62633 [2022-11-16 11:13:01,500 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 11:13:01,502 INFO L413 NwaCegarLoop]: 811 mSDtfsCounter, 825 mSDsluCounter, 117 mSDsCounter, 0 mSdLazyCounter, 2385 mSolverCounterSat, 900 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 825 SdHoareTripleChecker+Valid, 928 SdHoareTripleChecker+Invalid, 3285 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 900 IncrementalHoareTripleChecker+Valid, 2385 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.4s IncrementalHoareTripleChecker+Time [2022-11-16 11:13:01,503 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [825 Valid, 928 Invalid, 3285 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [900 Valid, 2385 Invalid, 0 Unknown, 0 Unchecked, 4.4s Time] [2022-11-16 11:13:01,547 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62633 states. [2022-11-16 11:13:02,458 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62633 to 61048. [2022-11-16 11:13:02,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61048 states, 61047 states have (on average 1.161138139466313) internal successors, (70884), 61047 states have internal predecessors, (70884), 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) [2022-11-16 11:13:02,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61048 states to 61048 states and 70884 transitions. [2022-11-16 11:13:02,779 INFO L78 Accepts]: Start accepts. Automaton has 61048 states and 70884 transitions. Word has length 240 [2022-11-16 11:13:02,780 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:13:02,780 INFO L495 AbstractCegarLoop]: Abstraction has 61048 states and 70884 transitions. [2022-11-16 11:13:02,780 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 80.0) internal successors, (240), 3 states have internal predecessors, (240), 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) [2022-11-16 11:13:02,780 INFO L276 IsEmpty]: Start isEmpty. Operand 61048 states and 70884 transitions. [2022-11-16 11:13:02,784 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 255 [2022-11-16 11:13:02,784 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:13:02,784 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:13:02,785 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-11-16 11:13:02,785 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 11:13:02,790 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:13:02,790 INFO L85 PathProgramCache]: Analyzing trace with hash -1350158918, now seen corresponding path program 1 times [2022-11-16 11:13:02,791 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:13:02,791 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [458985705] [2022-11-16 11:13:02,791 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:13:02,791 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:13:02,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:13:03,489 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 21 proven. 0 refuted. 0 times theorem prover too weak. 113 trivial. 0 not checked. [2022-11-16 11:13:03,489 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:13:03,490 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [458985705] [2022-11-16 11:13:03,494 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [458985705] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:13:03,494 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:13:03,494 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-16 11:13:03,494 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [169077532] [2022-11-16 11:13:03,494 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:13:03,495 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 11:13:03,495 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:13:03,495 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 11:13:03,496 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 11:13:03,496 INFO L87 Difference]: Start difference. First operand 61048 states and 70884 transitions. Second operand has 3 states, 3 states have (on average 47.333333333333336) internal successors, (142), 3 states have internal predecessors, (142), 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) [2022-11-16 11:13:08,316 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:13:08,317 INFO L93 Difference]: Finished difference Result 121305 states and 140973 transitions. [2022-11-16 11:13:08,317 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 11:13:08,317 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 47.333333333333336) internal successors, (142), 3 states have internal predecessors, (142), 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 254 [2022-11-16 11:13:08,318 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:13:08,391 INFO L225 Difference]: With dead ends: 121305 [2022-11-16 11:13:08,392 INFO L226 Difference]: Without dead ends: 61046 [2022-11-16 11:13:08,415 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 11:13:08,416 INFO L413 NwaCegarLoop]: 1357 mSDtfsCounter, 1193 mSDsluCounter, 81 mSDsCounter, 0 mSdLazyCounter, 2468 mSolverCounterSat, 445 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1193 SdHoareTripleChecker+Valid, 1438 SdHoareTripleChecker+Invalid, 2913 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 445 IncrementalHoareTripleChecker+Valid, 2468 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.3s IncrementalHoareTripleChecker+Time [2022-11-16 11:13:08,416 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1193 Valid, 1438 Invalid, 2913 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [445 Valid, 2468 Invalid, 0 Unknown, 0 Unchecked, 4.3s Time] [2022-11-16 11:13:08,464 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61046 states. [2022-11-16 11:13:09,311 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61046 to 61045. [2022-11-16 11:13:09,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61045 states, 61044 states have (on average 1.1303322193827403) internal successors, (69000), 61044 states have internal predecessors, (69000), 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) [2022-11-16 11:13:09,403 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61045 states to 61045 states and 69000 transitions. [2022-11-16 11:13:09,404 INFO L78 Accepts]: Start accepts. Automaton has 61045 states and 69000 transitions. Word has length 254 [2022-11-16 11:13:09,404 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:13:09,404 INFO L495 AbstractCegarLoop]: Abstraction has 61045 states and 69000 transitions. [2022-11-16 11:13:09,404 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 47.333333333333336) internal successors, (142), 3 states have internal predecessors, (142), 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) [2022-11-16 11:13:09,405 INFO L276 IsEmpty]: Start isEmpty. Operand 61045 states and 69000 transitions. [2022-11-16 11:13:09,411 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 320 [2022-11-16 11:13:09,411 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:13:09,411 INFO L195 NwaCegarLoop]: trace histogram [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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2022-11-16 11:13:09,412 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-11-16 11:13:09,412 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 11:13:09,412 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:13:09,412 INFO L85 PathProgramCache]: Analyzing trace with hash 290243953, now seen corresponding path program 1 times [2022-11-16 11:13:09,413 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:13:09,413 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1478830536] [2022-11-16 11:13:09,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:13:09,413 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:13:09,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:13:11,559 INFO L134 CoverageAnalysis]: Checked inductivity of 274 backedges. 150 proven. 113 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-16 11:13:11,559 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:13:11,559 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1478830536] [2022-11-16 11:13:11,560 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1478830536] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 11:13:11,560 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1571419845] [2022-11-16 11:13:11,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:13:11,560 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:13:11,560 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58ae58e8-b7c6-41d0-9a61-051d81487cd8/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:13:11,566 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58ae58e8-b7c6-41d0-9a61-051d81487cd8/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:13:11,590 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58ae58e8-b7c6-41d0-9a61-051d81487cd8/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-16 11:13:11,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:13:11,769 INFO L263 TraceCheckSpWp]: Trace formula consists of 467 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-16 11:13:11,786 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:13:11,970 INFO L134 CoverageAnalysis]: Checked inductivity of 274 backedges. 161 proven. 0 refuted. 0 times theorem prover too weak. 113 trivial. 0 not checked. [2022-11-16 11:13:11,970 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 11:13:11,971 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1571419845] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:13:11,971 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-16 11:13:11,971 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [7] total 9 [2022-11-16 11:13:11,971 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1884282405] [2022-11-16 11:13:11,971 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:13:11,972 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 11:13:11,972 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:13:11,973 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 11:13:11,973 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2022-11-16 11:13:11,973 INFO L87 Difference]: Start difference. First operand 61045 states and 69000 transitions. Second operand has 3 states, 3 states have (on average 69.0) internal successors, (207), 3 states have internal predecessors, (207), 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) [2022-11-16 11:13:16,863 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:13:16,863 INFO L93 Difference]: Finished difference Result 121290 states and 137196 transitions. [2022-11-16 11:13:16,864 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 11:13:16,864 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 69.0) internal successors, (207), 3 states have internal predecessors, (207), 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 319 [2022-11-16 11:13:16,864 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:13:16,929 INFO L225 Difference]: With dead ends: 121290 [2022-11-16 11:13:16,929 INFO L226 Difference]: Without dead ends: 61034 [2022-11-16 11:13:17,084 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 325 GetRequests, 318 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2022-11-16 11:13:17,085 INFO L413 NwaCegarLoop]: 685 mSDtfsCounter, 1073 mSDsluCounter, 131 mSDsCounter, 0 mSdLazyCounter, 2392 mSolverCounterSat, 527 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1073 SdHoareTripleChecker+Valid, 816 SdHoareTripleChecker+Invalid, 2919 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 527 IncrementalHoareTripleChecker+Valid, 2392 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.4s IncrementalHoareTripleChecker+Time [2022-11-16 11:13:17,085 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1073 Valid, 816 Invalid, 2919 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [527 Valid, 2392 Invalid, 0 Unknown, 0 Unchecked, 4.4s Time] [2022-11-16 11:13:17,145 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61034 states. [2022-11-16 11:13:17,737 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61034 to 61031. [2022-11-16 11:13:17,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61031 states, 61030 states have (on average 1.0942978862854333) internal successors, (66785), 61030 states have internal predecessors, (66785), 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) [2022-11-16 11:13:17,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61031 states to 61031 states and 66785 transitions. [2022-11-16 11:13:17,862 INFO L78 Accepts]: Start accepts. Automaton has 61031 states and 66785 transitions. Word has length 319 [2022-11-16 11:13:17,862 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:13:17,862 INFO L495 AbstractCegarLoop]: Abstraction has 61031 states and 66785 transitions. [2022-11-16 11:13:17,863 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 69.0) internal successors, (207), 3 states have internal predecessors, (207), 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) [2022-11-16 11:13:17,863 INFO L276 IsEmpty]: Start isEmpty. Operand 61031 states and 66785 transitions. [2022-11-16 11:13:17,872 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 362 [2022-11-16 11:13:17,872 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:13:17,873 INFO L195 NwaCegarLoop]: trace histogram [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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:13:17,880 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58ae58e8-b7c6-41d0-9a61-051d81487cd8/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-16 11:13:18,079 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58ae58e8-b7c6-41d0-9a61-051d81487cd8/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:13:18,080 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 11:13:18,080 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:13:18,081 INFO L85 PathProgramCache]: Analyzing trace with hash 448094546, now seen corresponding path program 1 times [2022-11-16 11:13:18,081 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:13:18,081 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [919456335] [2022-11-16 11:13:18,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:13:18,081 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:13:18,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:13:18,660 INFO L134 CoverageAnalysis]: Checked inductivity of 499 backedges. 412 proven. 0 refuted. 0 times theorem prover too weak. 87 trivial. 0 not checked. [2022-11-16 11:13:18,660 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:13:18,660 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [919456335] [2022-11-16 11:13:18,661 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [919456335] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:13:18,661 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:13:18,661 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-16 11:13:18,661 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1942714749] [2022-11-16 11:13:18,661 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:13:18,662 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-16 11:13:18,662 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:13:18,662 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-16 11:13:18,663 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-16 11:13:18,663 INFO L87 Difference]: Start difference. First operand 61031 states and 66785 transitions. Second operand has 4 states, 4 states have (on average 71.75) internal successors, (287), 3 states have internal predecessors, (287), 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) [2022-11-16 11:13:29,148 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:13:29,148 INFO L93 Difference]: Finished difference Result 160046 states and 175830 transitions. [2022-11-16 11:13:29,149 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-16 11:13:29,149 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 71.75) internal successors, (287), 3 states have internal predecessors, (287), 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 361 [2022-11-16 11:13:29,149 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:13:29,253 INFO L225 Difference]: With dead ends: 160046 [2022-11-16 11:13:29,253 INFO L226 Difference]: Without dead ends: 99804 [2022-11-16 11:13:29,276 INFO L412 NwaCegarLoop]: 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 [2022-11-16 11:13:29,277 INFO L413 NwaCegarLoop]: 611 mSDtfsCounter, 1701 mSDsluCounter, 238 mSDsCounter, 0 mSdLazyCounter, 6693 mSolverCounterSat, 1016 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1701 SdHoareTripleChecker+Valid, 849 SdHoareTripleChecker+Invalid, 7709 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 1016 IncrementalHoareTripleChecker+Valid, 6693 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9.7s IncrementalHoareTripleChecker+Time [2022-11-16 11:13:29,277 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1701 Valid, 849 Invalid, 7709 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [1016 Valid, 6693 Invalid, 0 Unknown, 0 Unchecked, 9.7s Time] [2022-11-16 11:13:29,344 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99804 states. [2022-11-16 11:13:30,195 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99804 to 76786. [2022-11-16 11:13:30,237 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76786 states, 76785 states have (on average 1.0868138308263333) internal successors, (83451), 76785 states have internal predecessors, (83451), 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) [2022-11-16 11:13:30,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76786 states to 76786 states and 83451 transitions. [2022-11-16 11:13:30,329 INFO L78 Accepts]: Start accepts. Automaton has 76786 states and 83451 transitions. Word has length 361 [2022-11-16 11:13:30,329 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:13:30,329 INFO L495 AbstractCegarLoop]: Abstraction has 76786 states and 83451 transitions. [2022-11-16 11:13:30,330 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 71.75) internal successors, (287), 3 states have internal predecessors, (287), 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) [2022-11-16 11:13:30,330 INFO L276 IsEmpty]: Start isEmpty. Operand 76786 states and 83451 transitions. [2022-11-16 11:13:30,333 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 375 [2022-11-16 11:13:30,333 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:13:30,333 INFO L195 NwaCegarLoop]: trace histogram [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, 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] [2022-11-16 11:13:30,334 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-11-16 11:13:30,334 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 11:13:30,334 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:13:30,335 INFO L85 PathProgramCache]: Analyzing trace with hash 976006743, now seen corresponding path program 1 times [2022-11-16 11:13:30,335 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:13:30,335 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1649675643] [2022-11-16 11:13:30,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:13:30,335 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:13:30,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:13:30,911 INFO L134 CoverageAnalysis]: Checked inductivity of 304 backedges. 216 proven. 0 refuted. 0 times theorem prover too weak. 88 trivial. 0 not checked. [2022-11-16 11:13:30,911 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:13:30,911 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1649675643] [2022-11-16 11:13:30,911 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1649675643] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:13:30,912 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:13:30,912 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-16 11:13:30,912 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1636080112] [2022-11-16 11:13:30,912 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:13:30,913 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 11:13:30,913 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:13:30,913 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 11:13:30,913 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 11:13:30,914 INFO L87 Difference]: Start difference. First operand 76786 states and 83451 transitions. Second operand has 3 states, 3 states have (on average 95.66666666666667) internal successors, (287), 3 states have internal predecessors, (287), 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) [2022-11-16 11:13:36,434 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:13:36,434 INFO L93 Difference]: Finished difference Result 177191 states and 193935 transitions. [2022-11-16 11:13:36,435 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 11:13:36,435 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 95.66666666666667) internal successors, (287), 3 states have internal predecessors, (287), 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 374 [2022-11-16 11:13:36,436 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:13:36,534 INFO L225 Difference]: With dead ends: 177191 [2022-11-16 11:13:36,535 INFO L226 Difference]: Without dead ends: 101194 [2022-11-16 11:13:36,555 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 11:13:36,556 INFO L413 NwaCegarLoop]: 811 mSDtfsCounter, 813 mSDsluCounter, 82 mSDsCounter, 0 mSdLazyCounter, 2418 mSolverCounterSat, 932 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 813 SdHoareTripleChecker+Valid, 893 SdHoareTripleChecker+Invalid, 3350 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 932 IncrementalHoareTripleChecker+Valid, 2418 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.6s IncrementalHoareTripleChecker+Time [2022-11-16 11:13:36,557 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [813 Valid, 893 Invalid, 3350 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [932 Valid, 2418 Invalid, 0 Unknown, 0 Unchecked, 4.6s Time] [2022-11-16 11:13:36,624 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101194 states. [2022-11-16 11:13:37,667 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101194 to 99602. [2022-11-16 11:13:37,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99602 states, 99601 states have (on average 1.090099496993002) internal successors, (108575), 99601 states have internal predecessors, (108575), 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) [2022-11-16 11:13:37,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99602 states to 99602 states and 108575 transitions. [2022-11-16 11:13:37,816 INFO L78 Accepts]: Start accepts. Automaton has 99602 states and 108575 transitions. Word has length 374 [2022-11-16 11:13:37,818 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:13:37,818 INFO L495 AbstractCegarLoop]: Abstraction has 99602 states and 108575 transitions. [2022-11-16 11:13:37,818 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 95.66666666666667) internal successors, (287), 3 states have internal predecessors, (287), 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) [2022-11-16 11:13:37,818 INFO L276 IsEmpty]: Start isEmpty. Operand 99602 states and 108575 transitions. [2022-11-16 11:13:37,826 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 405 [2022-11-16 11:13:37,826 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:13:37,827 INFO L195 NwaCegarLoop]: trace histogram [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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:13:37,827 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-11-16 11:13:37,827 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 11:13:37,828 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:13:37,828 INFO L85 PathProgramCache]: Analyzing trace with hash -1106420568, now seen corresponding path program 1 times [2022-11-16 11:13:37,828 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:13:37,828 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1219117274] [2022-11-16 11:13:37,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:13:37,829 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:13:37,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:13:40,166 INFO L134 CoverageAnalysis]: Checked inductivity of 519 backedges. 319 proven. 113 refuted. 0 times theorem prover too weak. 87 trivial. 0 not checked. [2022-11-16 11:13:40,167 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:13:40,168 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1219117274] [2022-11-16 11:13:40,168 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1219117274] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 11:13:40,168 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1703838514] [2022-11-16 11:13:40,168 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:13:40,168 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:13:40,169 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58ae58e8-b7c6-41d0-9a61-051d81487cd8/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:13:40,170 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58ae58e8-b7c6-41d0-9a61-051d81487cd8/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:13:40,194 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58ae58e8-b7c6-41d0-9a61-051d81487cd8/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-16 11:13:40,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:13:40,400 INFO L263 TraceCheckSpWp]: Trace formula consists of 583 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-16 11:13:40,407 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:13:40,456 INFO L134 CoverageAnalysis]: Checked inductivity of 519 backedges. 43 proven. 0 refuted. 0 times theorem prover too weak. 476 trivial. 0 not checked. [2022-11-16 11:13:40,457 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 11:13:40,457 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1703838514] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:13:40,457 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-16 11:13:40,457 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [7] total 9 [2022-11-16 11:13:40,458 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [17701984] [2022-11-16 11:13:40,458 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:13:40,459 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 11:13:40,459 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:13:40,459 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 11:13:40,459 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2022-11-16 11:13:40,460 INFO L87 Difference]: Start difference. First operand 99602 states and 108575 transitions. Second operand has 3 states, 3 states have (on average 48.0) internal successors, (144), 3 states have internal predecessors, (144), 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) [2022-11-16 11:13:45,238 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:13:45,238 INFO L93 Difference]: Finished difference Result 199993 states and 217948 transitions. [2022-11-16 11:13:45,238 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 11:13:45,238 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 48.0) internal successors, (144), 3 states have internal predecessors, (144), 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 404 [2022-11-16 11:13:45,239 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:13:45,344 INFO L225 Difference]: With dead ends: 199993 [2022-11-16 11:13:45,344 INFO L226 Difference]: Without dead ends: 101180 [2022-11-16 11:13:45,376 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 410 GetRequests, 403 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2022-11-16 11:13:45,376 INFO L413 NwaCegarLoop]: 1385 mSDtfsCounter, 1026 mSDsluCounter, 86 mSDsCounter, 0 mSdLazyCounter, 2486 mSolverCounterSat, 607 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1026 SdHoareTripleChecker+Valid, 1471 SdHoareTripleChecker+Invalid, 3093 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 607 IncrementalHoareTripleChecker+Valid, 2486 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.1s IncrementalHoareTripleChecker+Time [2022-11-16 11:13:45,376 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1026 Valid, 1471 Invalid, 3093 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [607 Valid, 2486 Invalid, 0 Unknown, 0 Unchecked, 4.1s Time] [2022-11-16 11:13:45,447 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101180 states. [2022-11-16 11:13:46,505 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101180 to 99594. [2022-11-16 11:13:46,558 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99594 states, 99593 states have (on average 1.0667014750032633) internal successors, (106236), 99593 states have internal predecessors, (106236), 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) [2022-11-16 11:13:46,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99594 states to 99594 states and 106236 transitions. [2022-11-16 11:13:46,660 INFO L78 Accepts]: Start accepts. Automaton has 99594 states and 106236 transitions. Word has length 404 [2022-11-16 11:13:46,660 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:13:46,660 INFO L495 AbstractCegarLoop]: Abstraction has 99594 states and 106236 transitions. [2022-11-16 11:13:46,661 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 48.0) internal successors, (144), 3 states have internal predecessors, (144), 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) [2022-11-16 11:13:46,661 INFO L276 IsEmpty]: Start isEmpty. Operand 99594 states and 106236 transitions. [2022-11-16 11:13:46,674 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 487 [2022-11-16 11:13:46,675 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:13:46,675 INFO L195 NwaCegarLoop]: trace histogram [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, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:13:46,681 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58ae58e8-b7c6-41d0-9a61-051d81487cd8/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-16 11:13:46,880 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58ae58e8-b7c6-41d0-9a61-051d81487cd8/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-11-16 11:13:46,880 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 11:13:46,881 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:13:46,881 INFO L85 PathProgramCache]: Analyzing trace with hash -663684841, now seen corresponding path program 1 times [2022-11-16 11:13:46,881 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:13:46,881 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1229624698] [2022-11-16 11:13:46,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:13:46,881 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:13:46,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:13:47,600 INFO L134 CoverageAnalysis]: Checked inductivity of 628 backedges. 356 proven. 0 refuted. 0 times theorem prover too weak. 272 trivial. 0 not checked. [2022-11-16 11:13:47,600 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:13:47,600 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1229624698] [2022-11-16 11:13:47,600 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1229624698] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:13:47,600 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:13:47,601 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-16 11:13:47,601 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1035251738] [2022-11-16 11:13:47,601 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:13:47,602 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 11:13:47,602 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:13:47,602 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 11:13:47,602 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 11:13:47,603 INFO L87 Difference]: Start difference. First operand 99594 states and 106236 transitions. Second operand has 3 states, 3 states have (on average 101.33333333333333) internal successors, (304), 3 states have internal predecessors, (304), 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) [2022-11-16 11:13:52,835 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:13:52,836 INFO L93 Difference]: Finished difference Result 223599 states and 239290 transitions. [2022-11-16 11:13:52,837 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 11:13:52,837 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 101.33333333333333) internal successors, (304), 3 states have internal predecessors, (304), 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 486 [2022-11-16 11:13:52,838 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:13:53,173 INFO L225 Difference]: With dead ends: 223599 [2022-11-16 11:13:53,173 INFO L226 Difference]: Without dead ends: 123220 [2022-11-16 11:13:53,198 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 11:13:53,199 INFO L413 NwaCegarLoop]: 1740 mSDtfsCounter, 703 mSDsluCounter, 143 mSDsCounter, 0 mSdLazyCounter, 2523 mSolverCounterSat, 462 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 703 SdHoareTripleChecker+Valid, 1883 SdHoareTripleChecker+Invalid, 2985 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 462 IncrementalHoareTripleChecker+Valid, 2523 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.4s IncrementalHoareTripleChecker+Time [2022-11-16 11:13:53,199 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [703 Valid, 1883 Invalid, 2985 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [462 Valid, 2523 Invalid, 0 Unknown, 0 Unchecked, 4.4s Time] [2022-11-16 11:13:53,275 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123220 states. [2022-11-16 11:13:54,444 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123220 to 123202. [2022-11-16 11:13:54,501 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 123202 states, 123201 states have (on average 1.0590985462780333) internal successors, (130482), 123201 states have internal predecessors, (130482), 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) [2022-11-16 11:13:55,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123202 states to 123202 states and 130482 transitions. [2022-11-16 11:13:55,013 INFO L78 Accepts]: Start accepts. Automaton has 123202 states and 130482 transitions. Word has length 486 [2022-11-16 11:13:55,013 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:13:55,013 INFO L495 AbstractCegarLoop]: Abstraction has 123202 states and 130482 transitions. [2022-11-16 11:13:55,014 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 101.33333333333333) internal successors, (304), 3 states have internal predecessors, (304), 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) [2022-11-16 11:13:55,014 INFO L276 IsEmpty]: Start isEmpty. Operand 123202 states and 130482 transitions. [2022-11-16 11:13:55,027 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 510 [2022-11-16 11:13:55,027 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:13:55,028 INFO L195 NwaCegarLoop]: trace histogram [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, 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] [2022-11-16 11:13:55,028 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-11-16 11:13:55,029 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 11:13:55,029 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:13:55,029 INFO L85 PathProgramCache]: Analyzing trace with hash -1195250089, now seen corresponding path program 1 times [2022-11-16 11:13:55,029 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:13:55,030 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1297415553] [2022-11-16 11:13:55,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:13:55,030 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:13:55,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:13:56,809 INFO L134 CoverageAnalysis]: Checked inductivity of 383 backedges. 262 proven. 110 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-16 11:13:56,810 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:13:56,810 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1297415553] [2022-11-16 11:13:56,810 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1297415553] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 11:13:56,810 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [840356298] [2022-11-16 11:13:56,811 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:13:56,811 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:13:56,811 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58ae58e8-b7c6-41d0-9a61-051d81487cd8/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:13:56,812 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58ae58e8-b7c6-41d0-9a61-051d81487cd8/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:13:56,834 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58ae58e8-b7c6-41d0-9a61-051d81487cd8/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-16 11:13:57,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:13:57,081 INFO L263 TraceCheckSpWp]: Trace formula consists of 654 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-16 11:13:57,089 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:13:57,141 INFO L134 CoverageAnalysis]: Checked inductivity of 383 backedges. 32 proven. 0 refuted. 0 times theorem prover too weak. 351 trivial. 0 not checked. [2022-11-16 11:13:57,141 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 11:13:57,141 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [840356298] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:13:57,141 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-16 11:13:57,142 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 8 [2022-11-16 11:13:57,142 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [407886346] [2022-11-16 11:13:57,142 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:13:57,143 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 11:13:57,143 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:13:57,144 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 11:13:57,144 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2022-11-16 11:13:57,144 INFO L87 Difference]: Start difference. First operand 123202 states and 130482 transitions. Second operand has 3 states, 3 states have (on average 91.0) internal successors, (273), 3 states have internal predecessors, (273), 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) [2022-11-16 11:14:03,780 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:14:03,780 INFO L93 Difference]: Finished difference Result 282681 states and 299848 transitions. [2022-11-16 11:14:03,780 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 11:14:03,780 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 91.0) internal successors, (273), 3 states have internal predecessors, (273), 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 509 [2022-11-16 11:14:03,781 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:14:03,927 INFO L225 Difference]: With dead ends: 282681 [2022-11-16 11:14:03,927 INFO L226 Difference]: Without dead ends: 160268 [2022-11-16 11:14:03,964 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 514 GetRequests, 508 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2022-11-16 11:14:03,965 INFO L413 NwaCegarLoop]: 419 mSDtfsCounter, 1025 mSDsluCounter, 48 mSDsCounter, 0 mSdLazyCounter, 2753 mSolverCounterSat, 932 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1025 SdHoareTripleChecker+Valid, 467 SdHoareTripleChecker+Invalid, 3685 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 932 IncrementalHoareTripleChecker+Valid, 2753 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.6s IncrementalHoareTripleChecker+Time [2022-11-16 11:14:03,965 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1025 Valid, 467 Invalid, 3685 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [932 Valid, 2753 Invalid, 0 Unknown, 0 Unchecked, 5.6s Time] [2022-11-16 11:14:04,086 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160268 states. [2022-11-16 11:14:05,762 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160268 to 157048. [2022-11-16 11:14:05,854 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 157048 states, 157047 states have (on average 1.0612173425789733) internal successors, (166661), 157047 states have internal predecessors, (166661), 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) [2022-11-16 11:14:06,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157048 states to 157048 states and 166661 transitions. [2022-11-16 11:14:06,494 INFO L78 Accepts]: Start accepts. Automaton has 157048 states and 166661 transitions. Word has length 509 [2022-11-16 11:14:06,494 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:14:06,495 INFO L495 AbstractCegarLoop]: Abstraction has 157048 states and 166661 transitions. [2022-11-16 11:14:06,495 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 91.0) internal successors, (273), 3 states have internal predecessors, (273), 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) [2022-11-16 11:14:06,495 INFO L276 IsEmpty]: Start isEmpty. Operand 157048 states and 166661 transitions. [2022-11-16 11:14:06,532 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 558 [2022-11-16 11:14:06,542 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:14:06,544 INFO L195 NwaCegarLoop]: trace histogram [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, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2022-11-16 11:14:06,549 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58ae58e8-b7c6-41d0-9a61-051d81487cd8/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-11-16 11:14:06,749 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58ae58e8-b7c6-41d0-9a61-051d81487cd8/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-11-16 11:14:06,749 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 11:14:06,750 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:14:06,750 INFO L85 PathProgramCache]: Analyzing trace with hash -396042517, now seen corresponding path program 1 times [2022-11-16 11:14:06,750 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:14:06,750 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1731787184] [2022-11-16 11:14:06,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:14:06,751 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:14:06,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:14:08,572 INFO L134 CoverageAnalysis]: Checked inductivity of 437 backedges. 316 proven. 110 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-16 11:14:08,573 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:14:08,573 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1731787184] [2022-11-16 11:14:08,574 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1731787184] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 11:14:08,574 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [372965380] [2022-11-16 11:14:08,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:14:08,574 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:14:08,574 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58ae58e8-b7c6-41d0-9a61-051d81487cd8/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:14:08,575 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58ae58e8-b7c6-41d0-9a61-051d81487cd8/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:14:08,594 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58ae58e8-b7c6-41d0-9a61-051d81487cd8/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-16 11:14:08,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:14:08,852 INFO L263 TraceCheckSpWp]: Trace formula consists of 705 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-16 11:14:08,862 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:14:10,494 INFO L134 CoverageAnalysis]: Checked inductivity of 437 backedges. 302 proven. 0 refuted. 0 times theorem prover too weak. 135 trivial. 0 not checked. [2022-11-16 11:14:10,494 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 11:14:10,494 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [372965380] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:14:10,494 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-16 11:14:10,495 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2022-11-16 11:14:10,495 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2099392172] [2022-11-16 11:14:10,495 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:14:10,496 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 11:14:10,496 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:14:10,497 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 11:14:10,497 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-11-16 11:14:10,497 INFO L87 Difference]: Start difference. First operand 157048 states and 166661 transitions. Second operand has 3 states, 3 states have (on average 141.33333333333334) internal successors, (424), 2 states have internal predecessors, (424), 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) [2022-11-16 11:14:15,400 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:14:15,400 INFO L93 Difference]: Finished difference Result 301511 states and 320520 transitions. [2022-11-16 11:14:15,401 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 11:14:15,401 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 141.33333333333334) internal successors, (424), 2 states have internal predecessors, (424), 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 557 [2022-11-16 11:14:15,401 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:14:15,576 INFO L225 Difference]: With dead ends: 301511 [2022-11-16 11:14:15,576 INFO L226 Difference]: Without dead ends: 161783 [2022-11-16 11:14:15,635 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 561 GetRequests, 556 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-11-16 11:14:15,638 INFO L413 NwaCegarLoop]: 1016 mSDtfsCounter, 546 mSDsluCounter, 134 mSDsCounter, 0 mSdLazyCounter, 2446 mSolverCounterSat, 112 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 546 SdHoareTripleChecker+Valid, 1150 SdHoareTripleChecker+Invalid, 2558 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 112 IncrementalHoareTripleChecker+Valid, 2446 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.0s IncrementalHoareTripleChecker+Time [2022-11-16 11:14:15,638 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [546 Valid, 1150 Invalid, 2558 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [112 Valid, 2446 Invalid, 0 Unknown, 0 Unchecked, 4.0s Time] [2022-11-16 11:14:15,771 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161783 states. [2022-11-16 11:14:17,569 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161783 to 160986. [2022-11-16 11:14:17,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 160986 states, 160985 states have (on average 1.0561977824020872) internal successors, (170032), 160985 states have internal predecessors, (170032), 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) [2022-11-16 11:14:17,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160986 states to 160986 states and 170032 transitions. [2022-11-16 11:14:17,810 INFO L78 Accepts]: Start accepts. Automaton has 160986 states and 170032 transitions. Word has length 557 [2022-11-16 11:14:17,810 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:14:17,811 INFO L495 AbstractCegarLoop]: Abstraction has 160986 states and 170032 transitions. [2022-11-16 11:14:17,811 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 141.33333333333334) internal successors, (424), 2 states have internal predecessors, (424), 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) [2022-11-16 11:14:17,811 INFO L276 IsEmpty]: Start isEmpty. Operand 160986 states and 170032 transitions. [2022-11-16 11:14:17,822 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 577 [2022-11-16 11:14:17,822 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:14:17,822 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 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, 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, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:14:17,827 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58ae58e8-b7c6-41d0-9a61-051d81487cd8/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-16 11:14:18,024 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58ae58e8-b7c6-41d0-9a61-051d81487cd8/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-11-16 11:14:18,025 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 11:14:18,025 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:14:18,025 INFO L85 PathProgramCache]: Analyzing trace with hash 291527895, now seen corresponding path program 1 times [2022-11-16 11:14:18,025 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:14:18,025 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [763729699] [2022-11-16 11:14:18,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:14:18,026 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:14:18,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:14:18,360 INFO L134 CoverageAnalysis]: Checked inductivity of 987 backedges. 453 proven. 0 refuted. 0 times theorem prover too weak. 534 trivial. 0 not checked. [2022-11-16 11:14:18,361 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:14:18,361 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [763729699] [2022-11-16 11:14:18,361 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [763729699] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:14:18,361 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:14:18,361 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-16 11:14:18,362 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [375463085] [2022-11-16 11:14:18,362 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:14:18,362 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 11:14:18,363 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:14:18,363 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 11:14:18,363 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 11:14:18,363 INFO L87 Difference]: Start difference. First operand 160986 states and 170032 transitions. Second operand has 3 states, 3 states have (on average 100.33333333333333) internal successors, (301), 2 states have internal predecessors, (301), 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) [2022-11-16 11:14:22,665 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:14:22,665 INFO L93 Difference]: Finished difference Result 303059 states and 320766 transitions. [2022-11-16 11:14:22,666 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 11:14:22,666 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 100.33333333333333) internal successors, (301), 2 states have internal predecessors, (301), 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 576 [2022-11-16 11:14:22,666 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:14:22,845 INFO L225 Difference]: With dead ends: 303059 [2022-11-16 11:14:22,845 INFO L226 Difference]: Without dead ends: 160970 [2022-11-16 11:14:22,902 INFO L412 NwaCegarLoop]: 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 [2022-11-16 11:14:22,903 INFO L413 NwaCegarLoop]: 290 mSDtfsCounter, 1600 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 1457 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1600 SdHoareTripleChecker+Valid, 290 SdHoareTripleChecker+Invalid, 1469 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 1457 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.8s IncrementalHoareTripleChecker+Time [2022-11-16 11:14:22,903 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1600 Valid, 290 Invalid, 1469 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 1457 Invalid, 0 Unknown, 0 Unchecked, 2.8s Time] [2022-11-16 11:14:23,029 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160970 states.