./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/pthread-ext/47_ticket_lock_hc_backoff_vs.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 53f42b1a Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_759fe9e1-02b8-49e1-96c7-aa6e3659406a/bin/ugemcutter-b9s2R6iq4d/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_759fe9e1-02b8-49e1-96c7-aa6e3659406a/bin/ugemcutter-b9s2R6iq4d/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_759fe9e1-02b8-49e1-96c7-aa6e3659406a/bin/ugemcutter-b9s2R6iq4d/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_759fe9e1-02b8-49e1-96c7-aa6e3659406a/bin/ugemcutter-b9s2R6iq4d/config/GemCutterReach.xml -i ../../sv-benchmarks/c/pthread-ext/47_ticket_lock_hc_backoff_vs.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_759fe9e1-02b8-49e1-96c7-aa6e3659406a/bin/ugemcutter-b9s2R6iq4d/config/svcomp-Reach-32bit-GemCutter_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_759fe9e1-02b8-49e1-96c7-aa6e3659406a/bin/ugemcutter-b9s2R6iq4d --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 GemCutter --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 22ccde2ce516925ebfe813d783d47f1167b5115e5910734aa9e1bf526ce8c733 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-53f42b1 [2021-11-20 07:47:32,658 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-20 07:47:32,661 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-20 07:47:32,714 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-20 07:47:32,715 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-20 07:47:32,717 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-20 07:47:32,719 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-20 07:47:32,722 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-20 07:47:32,725 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-20 07:47:32,727 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-20 07:47:32,729 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-20 07:47:32,730 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-20 07:47:32,731 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-20 07:47:32,733 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-20 07:47:32,735 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-20 07:47:32,736 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-20 07:47:32,738 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-20 07:47:32,739 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-20 07:47:32,742 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-20 07:47:32,744 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-20 07:47:32,747 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-20 07:47:32,749 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-20 07:47:32,750 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-20 07:47:32,752 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-20 07:47:32,756 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-20 07:47:32,756 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-20 07:47:32,757 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-20 07:47:32,758 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-20 07:47:32,759 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-20 07:47:32,760 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-20 07:47:32,761 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-20 07:47:32,762 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-20 07:47:32,763 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-20 07:47:32,764 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-20 07:47:32,765 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-20 07:47:32,766 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-20 07:47:32,767 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-20 07:47:32,767 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-20 07:47:32,768 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-20 07:47:32,769 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-20 07:47:32,770 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-20 07:47:32,772 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_759fe9e1-02b8-49e1-96c7-aa6e3659406a/bin/ugemcutter-b9s2R6iq4d/config/svcomp-Reach-32bit-GemCutter_Default.epf [2021-11-20 07:47:32,797 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-20 07:47:32,797 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-20 07:47:32,798 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-20 07:47:32,798 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-20 07:47:32,799 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-20 07:47:32,799 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-20 07:47:32,800 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-20 07:47:32,801 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-20 07:47:32,801 INFO L138 SettingsManager]: * Use SBE=true [2021-11-20 07:47:32,802 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-20 07:47:32,802 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-20 07:47:32,802 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-20 07:47:32,803 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-20 07:47:32,803 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-20 07:47:32,803 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-20 07:47:32,803 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-20 07:47:32,804 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-20 07:47:32,804 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-20 07:47:32,804 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-20 07:47:32,805 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-20 07:47:32,805 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-20 07:47:32,805 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-20 07:47:32,805 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-20 07:47:32,806 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-11-20 07:47:32,806 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-20 07:47:32,806 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-20 07:47:32,807 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-20 07:47:32,807 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-20 07:47:32,807 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-20 07:47:32,808 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-11-20 07:47:32,808 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-20 07:47:32,808 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-11-20 07:47:32,808 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PARTIAL_ORDER_FA [2021-11-20 07:47:32,809 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-20 07:47:32,809 INFO L138 SettingsManager]: * CEGAR restart behaviour=ONE_CEGAR_PER_THREAD_INSTANCE [2021-11-20 07:47:32,809 INFO L138 SettingsManager]: * Partial Order Reduction in concurrent analysis=PERSISTENT_SLEEP_NEW_STATES_FIXEDORDER [2021-11-20 07:47:32,809 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_759fe9e1-02b8-49e1-96c7-aa6e3659406a/bin/ugemcutter-b9s2R6iq4d/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_759fe9e1-02b8-49e1-96c7-aa6e3659406a/bin/ugemcutter-b9s2R6iq4d Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> GemCutter Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 22ccde2ce516925ebfe813d783d47f1167b5115e5910734aa9e1bf526ce8c733 [2021-11-20 07:47:33,100 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-20 07:47:33,132 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-20 07:47:33,137 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-20 07:47:33,139 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-20 07:47:33,140 INFO L275 PluginConnector]: CDTParser initialized [2021-11-20 07:47:33,142 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_759fe9e1-02b8-49e1-96c7-aa6e3659406a/bin/ugemcutter-b9s2R6iq4d/../../sv-benchmarks/c/pthread-ext/47_ticket_lock_hc_backoff_vs.i [2021-11-20 07:47:33,208 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_759fe9e1-02b8-49e1-96c7-aa6e3659406a/bin/ugemcutter-b9s2R6iq4d/data/f1fe21497/54d3a54261134e9ca61df9945d7a4e72/FLAG4382b8be7 [2021-11-20 07:47:33,772 INFO L306 CDTParser]: Found 1 translation units. [2021-11-20 07:47:33,772 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_759fe9e1-02b8-49e1-96c7-aa6e3659406a/sv-benchmarks/c/pthread-ext/47_ticket_lock_hc_backoff_vs.i [2021-11-20 07:47:33,803 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_759fe9e1-02b8-49e1-96c7-aa6e3659406a/bin/ugemcutter-b9s2R6iq4d/data/f1fe21497/54d3a54261134e9ca61df9945d7a4e72/FLAG4382b8be7 [2021-11-20 07:47:34,053 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_759fe9e1-02b8-49e1-96c7-aa6e3659406a/bin/ugemcutter-b9s2R6iq4d/data/f1fe21497/54d3a54261134e9ca61df9945d7a4e72 [2021-11-20 07:47:34,056 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-20 07:47:34,058 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-20 07:47:34,060 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-20 07:47:34,061 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-20 07:47:34,064 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-20 07:47:34,065 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 07:47:34" (1/1) ... [2021-11-20 07:47:34,067 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@20797ffa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:47:34, skipping insertion in model container [2021-11-20 07:47:34,067 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 07:47:34" (1/1) ... [2021-11-20 07:47:34,075 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-20 07:47:34,117 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-20 07:47:34,600 WARN L230 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_759fe9e1-02b8-49e1-96c7-aa6e3659406a/sv-benchmarks/c/pthread-ext/47_ticket_lock_hc_backoff_vs.i[30336,30349] [2021-11-20 07:47:34,620 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-20 07:47:34,632 INFO L203 MainTranslator]: Completed pre-run [2021-11-20 07:47:34,695 WARN L230 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_759fe9e1-02b8-49e1-96c7-aa6e3659406a/sv-benchmarks/c/pthread-ext/47_ticket_lock_hc_backoff_vs.i[30336,30349] [2021-11-20 07:47:34,702 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-20 07:47:34,755 INFO L208 MainTranslator]: Completed translation [2021-11-20 07:47:34,755 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:47:34 WrapperNode [2021-11-20 07:47:34,755 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-20 07:47:34,756 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-20 07:47:34,757 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-20 07:47:34,757 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-20 07:47:34,765 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:47:34" (1/1) ... [2021-11-20 07:47:34,785 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:47:34" (1/1) ... [2021-11-20 07:47:34,810 INFO L137 Inliner]: procedures = 169, calls = 18, calls flagged for inlining = 5, calls inlined = 7, statements flattened = 108 [2021-11-20 07:47:34,810 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-20 07:47:34,811 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-20 07:47:34,811 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-20 07:47:34,811 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-20 07:47:34,820 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:47:34" (1/1) ... [2021-11-20 07:47:34,821 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:47:34" (1/1) ... [2021-11-20 07:47:34,824 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:47:34" (1/1) ... [2021-11-20 07:47:34,824 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:47:34" (1/1) ... [2021-11-20 07:47:34,831 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:47:34" (1/1) ... [2021-11-20 07:47:34,836 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:47:34" (1/1) ... [2021-11-20 07:47:34,838 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:47:34" (1/1) ... [2021-11-20 07:47:34,841 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-20 07:47:34,842 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-20 07:47:34,842 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-20 07:47:34,842 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-20 07:47:34,844 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:47:34" (1/1) ... [2021-11-20 07:47:34,868 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-20 07:47:34,881 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_759fe9e1-02b8-49e1-96c7-aa6e3659406a/bin/ugemcutter-b9s2R6iq4d/z3 [2021-11-20 07:47:34,899 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_759fe9e1-02b8-49e1-96c7-aa6e3659406a/bin/ugemcutter-b9s2R6iq4d/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-20 07:47:34,936 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_759fe9e1-02b8-49e1-96c7-aa6e3659406a/bin/ugemcutter-b9s2R6iq4d/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-20 07:47:34,956 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-20 07:47:34,957 INFO L130 BoogieDeclarations]: Found specification of procedure thr1 [2021-11-20 07:47:34,957 INFO L138 BoogieDeclarations]: Found implementation of procedure thr1 [2021-11-20 07:47:34,957 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-11-20 07:47:34,957 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-20 07:47:34,957 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-20 07:47:34,958 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-20 07:47:34,958 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-20 07:47:34,959 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-20 07:47:34,959 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-20 07:47:34,960 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-11-20 07:47:35,093 INFO L236 CfgBuilder]: Building ICFG [2021-11-20 07:47:35,095 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-20 07:47:35,272 INFO L277 CfgBuilder]: Performing block encoding [2021-11-20 07:47:35,323 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-20 07:47:35,323 INFO L301 CfgBuilder]: Removed 5 assume(true) statements. [2021-11-20 07:47:35,326 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 07:47:35 BoogieIcfgContainer [2021-11-20 07:47:35,326 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-20 07:47:35,328 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-20 07:47:35,328 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-20 07:47:35,332 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-20 07:47:35,332 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.11 07:47:34" (1/3) ... [2021-11-20 07:47:35,333 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@593d38af and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 07:47:35, skipping insertion in model container [2021-11-20 07:47:35,333 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:47:34" (2/3) ... [2021-11-20 07:47:35,334 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@593d38af and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 07:47:35, skipping insertion in model container [2021-11-20 07:47:35,334 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 07:47:35" (3/3) ... [2021-11-20 07:47:35,335 INFO L111 eAbstractionObserver]: Analyzing ICFG 47_ticket_lock_hc_backoff_vs.i [2021-11-20 07:47:35,342 WARN L149 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-11-20 07:47:35,342 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-20 07:47:35,342 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2021-11-20 07:47:35,342 INFO L513 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-11-20 07:47:35,380 WARN L322 ript$VariableManager]: TermVariabe |thr1Thread1of1ForFork0_#in~arg#1.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 07:47:35,380 WARN L322 ript$VariableManager]: TermVariabe |thr1Thread1of1ForFork0_#in~arg#1.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 07:47:35,381 WARN L322 ript$VariableManager]: TermVariabe |thr1Thread1of1ForFork0_~arg#1.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 07:47:35,381 WARN L322 ript$VariableManager]: TermVariabe |thr1Thread1of1ForFork0_~arg#1.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 07:47:35,381 WARN L322 ript$VariableManager]: TermVariabe |thr1Thread1of1ForFork0_#in~arg#1.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 07:47:35,382 WARN L322 ript$VariableManager]: TermVariabe |thr1Thread1of1ForFork0_#in~arg#1.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 07:47:35,382 WARN L322 ript$VariableManager]: TermVariabe |thr1Thread1of1ForFork0_~arg#1.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 07:47:35,382 WARN L322 ript$VariableManager]: TermVariabe |thr1Thread1of1ForFork0_~arg#1.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 07:47:35,383 WARN L322 ript$VariableManager]: TermVariabe |thr1Thread1of1ForFork0_#res#1.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 07:47:35,383 WARN L322 ript$VariableManager]: TermVariabe |thr1Thread1of1ForFork0_#res#1.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 07:47:35,384 WARN L322 ript$VariableManager]: TermVariabe |thr1Thread1of1ForFork0_#res#1.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 07:47:35,384 WARN L322 ript$VariableManager]: TermVariabe |thr1Thread1of1ForFork0_#res#1.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 07:47:35,384 WARN L322 ript$VariableManager]: TermVariabe |thr1Thread1of1ForFork0_~#l~0#1.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 07:47:35,385 WARN L322 ript$VariableManager]: TermVariabe |thr1Thread1of1ForFork0_~#l~0#1.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 07:47:35,385 WARN L322 ript$VariableManager]: TermVariabe |thr1Thread1of1ForFork0_~#l~0#1.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 07:47:35,385 WARN L322 ript$VariableManager]: TermVariabe |thr1Thread1of1ForFork0_~#l~0#1.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 07:47:35,386 WARN L322 ript$VariableManager]: TermVariabe |thr1Thread1of1ForFork0_~#l~0#1.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 07:47:35,386 WARN L322 ript$VariableManager]: TermVariabe |thr1Thread1of1ForFork0_~#l~0#1.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 07:47:35,386 WARN L322 ript$VariableManager]: TermVariabe |thr1Thread1of1ForFork0___VERIFIER_atomic_fetch_and_inc_~l#1.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 07:47:35,387 WARN L322 ript$VariableManager]: TermVariabe |thr1Thread1of1ForFork0___VERIFIER_atomic_fetch_and_inc_~l#1.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 07:47:35,387 WARN L322 ript$VariableManager]: TermVariabe |thr1Thread1of1ForFork0___VERIFIER_atomic_fetch_and_inc_#in~l#1.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 07:47:35,387 WARN L322 ript$VariableManager]: TermVariabe |thr1Thread1of1ForFork0_assume_abort_if_not_#in~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 07:47:35,387 WARN L322 ript$VariableManager]: TermVariabe |thr1Thread1of1ForFork0___VERIFIER_atomic_fetch_and_inc_#in~l#1.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 07:47:35,388 WARN L322 ript$VariableManager]: TermVariabe |thr1Thread1of1ForFork0_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 07:47:35,388 WARN L322 ript$VariableManager]: TermVariabe |thr1Thread1of1ForFork0_~#l~0#1.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 07:47:35,389 WARN L322 ript$VariableManager]: TermVariabe |thr1Thread1of1ForFork0_~#l~0#1.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 07:47:35,389 WARN L322 ript$VariableManager]: TermVariabe |thr1Thread1of1ForFork0___VERIFIER_atomic_fetch_and_inc_~l#1.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 07:47:35,389 WARN L322 ript$VariableManager]: TermVariabe |thr1Thread1of1ForFork0___VERIFIER_atomic_fetch_and_inc_~l#1.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 07:47:35,389 WARN L322 ript$VariableManager]: TermVariabe |thr1Thread1of1ForFork0___VERIFIER_atomic_fetch_and_inc_#in~l#1.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 07:47:35,390 WARN L322 ript$VariableManager]: TermVariabe |thr1Thread1of1ForFork0_assume_abort_if_not_#in~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 07:47:35,390 WARN L322 ript$VariableManager]: TermVariabe |thr1Thread1of1ForFork0___VERIFIER_atomic_fetch_and_inc_#in~l#1.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 07:47:35,390 WARN L322 ript$VariableManager]: TermVariabe |thr1Thread1of1ForFork0_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 07:47:35,391 WARN L322 ript$VariableManager]: TermVariabe |thr1Thread1of1ForFork0_~#l~0#1.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 07:47:35,392 WARN L322 ript$VariableManager]: TermVariabe |thr1Thread1of1ForFork0_~#l~0#1.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 07:47:35,392 WARN L322 ript$VariableManager]: TermVariabe |thr1Thread1of1ForFork0_#t~mem3#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 07:47:35,392 WARN L322 ript$VariableManager]: TermVariabe |thr1Thread1of1ForFork0_~#l~0#1.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 07:47:35,392 WARN L322 ript$VariableManager]: TermVariabe |thr1Thread1of1ForFork0_~#l~0#1.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 07:47:35,393 WARN L322 ript$VariableManager]: TermVariabe |thr1Thread1of1ForFork0_#t~mem3#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 07:47:35,393 WARN L322 ript$VariableManager]: TermVariabe |thr1Thread1of1ForFork0_#t~mem3#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 07:47:35,394 WARN L322 ript$VariableManager]: TermVariabe |thr1Thread1of1ForFork0_#t~mem3#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 07:47:35,394 WARN L322 ript$VariableManager]: TermVariabe |thr1Thread1of1ForFork0_#t~mem3#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 07:47:35,394 WARN L322 ript$VariableManager]: TermVariabe |thr1Thread1of1ForFork0_#t~mem3#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 07:47:35,395 WARN L322 ript$VariableManager]: TermVariabe |thr1Thread1of1ForFork0_#t~mem3#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 07:47:35,395 WARN L322 ript$VariableManager]: TermVariabe |thr1Thread1of1ForFork0_#t~mem3#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 07:47:35,396 WARN L322 ript$VariableManager]: TermVariabe |thr1Thread1of1ForFork0_#t~mem3#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 07:47:35,396 WARN L322 ript$VariableManager]: TermVariabe |thr1Thread1of1ForFork0_#t~mem3#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 07:47:35,396 WARN L322 ript$VariableManager]: TermVariabe |thr1Thread1of1ForFork0_#t~post4#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 07:47:35,397 WARN L322 ript$VariableManager]: TermVariabe |thr1Thread1of1ForFork0_#t~post4#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 07:47:35,397 WARN L322 ript$VariableManager]: TermVariabe |thr1Thread1of1ForFork0_#t~post4#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 07:47:35,397 WARN L322 ript$VariableManager]: TermVariabe |thr1Thread1of1ForFork0_#t~post4#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 07:47:35,398 WARN L322 ript$VariableManager]: TermVariabe |thr1Thread1of1ForFork0_#t~post4#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 07:47:35,398 WARN L322 ript$VariableManager]: TermVariabe |thr1Thread1of1ForFork0_#t~post4#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 07:47:35,399 WARN L322 ript$VariableManager]: TermVariabe |thr1Thread1of1ForFork0_~#l~0#1.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 07:47:35,399 WARN L322 ript$VariableManager]: TermVariabe |thr1Thread1of1ForFork0_~#l~0#1.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 07:47:35,399 WARN L322 ript$VariableManager]: TermVariabe |thr1Thread1of1ForFork0_~#l~0#1.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 07:47:35,400 WARN L322 ript$VariableManager]: TermVariabe |thr1Thread1of1ForFork0_~#l~0#1.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 07:47:35,400 WARN L322 ript$VariableManager]: TermVariabe |thr1Thread1of1ForFork0_~#l~0#1.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 07:47:35,400 WARN L322 ript$VariableManager]: TermVariabe |thr1Thread1of1ForFork0_~#l~0#1.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 07:47:35,404 WARN L322 ript$VariableManager]: TermVariabe |thr1Thread1of1ForFork0_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 07:47:35,405 WARN L322 ript$VariableManager]: TermVariabe |thr1Thread1of1ForFork0___VERIFIER_atomic_fetch_and_inc_~l#1.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 07:47:35,405 WARN L322 ript$VariableManager]: TermVariabe |thr1Thread1of1ForFork0___VERIFIER_atomic_fetch_and_inc_#in~l#1.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 07:47:35,405 WARN L322 ript$VariableManager]: TermVariabe |thr1Thread1of1ForFork0_~arg#1.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 07:47:35,405 WARN L322 ript$VariableManager]: TermVariabe |thr1Thread1of1ForFork0___VERIFIER_atomic_fetch_and_inc_~l#1.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 07:47:35,406 WARN L322 ript$VariableManager]: TermVariabe |thr1Thread1of1ForFork0_assume_abort_if_not_#in~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 07:47:35,406 WARN L322 ript$VariableManager]: TermVariabe |thr1Thread1of1ForFork0_~#l~0#1.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 07:47:35,406 WARN L322 ript$VariableManager]: TermVariabe |thr1Thread1of1ForFork0___VERIFIER_atomic_fetch_and_inc_#in~l#1.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 07:47:35,406 WARN L322 ript$VariableManager]: TermVariabe |thr1Thread1of1ForFork0_#res#1.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 07:47:35,407 WARN L322 ript$VariableManager]: TermVariabe |thr1Thread1of1ForFork0_~#l~0#1.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 07:47:35,407 WARN L322 ript$VariableManager]: TermVariabe |thr1Thread1of1ForFork0_#t~mem3#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 07:47:35,407 WARN L322 ript$VariableManager]: TermVariabe |thr1Thread1of1ForFork0_#res#1.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 07:47:35,408 WARN L322 ript$VariableManager]: TermVariabe |thr1Thread1of1ForFork0_#t~post4#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 07:47:35,408 WARN L322 ript$VariableManager]: TermVariabe |thr1Thread1of1ForFork0_~arg#1.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 07:47:35,410 INFO L148 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-11-20 07:47:35,465 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 [2021-11-20 07:47:35,465 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_759fe9e1-02b8-49e1-96c7-aa6e3659406a/bin/ugemcutter-b9s2R6iq4d/z3 [2021-11-20 07:47:35,467 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_759fe9e1-02b8-49e1-96c7-aa6e3659406a/bin/ugemcutter-b9s2R6iq4d/z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 (exit command is (exit), workingDir is null) [2021-11-20 07:47:35,487 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_759fe9e1-02b8-49e1-96c7-aa6e3659406a/bin/ugemcutter-b9s2R6iq4d/z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 (2)] Waiting until timeout for monitored process [2021-11-20 07:47:35,506 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == thr1Thread1of1ForFork0 ======== [2021-11-20 07:47:35,514 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PARTIAL_ORDER_FA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-20 07:47:35,521 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-20 07:47:35,746 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 07:47:35,751 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:47:35,751 INFO L85 PathProgramCache]: Analyzing trace with hash 479499207, now seen corresponding path program 1 times [2021-11-20 07:47:35,760 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:47:35,761 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [742884677] [2021-11-20 07:47:35,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:47:35,762 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:47:35,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:47:35,989 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 07:47:35,990 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:47:35,990 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [742884677] [2021-11-20 07:47:35,991 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [742884677] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 07:47:35,991 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 07:47:35,991 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-20 07:47:35,993 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1592747853] [2021-11-20 07:47:35,994 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 07:47:36,000 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-20 07:47:36,000 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:47:36,026 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-20 07:47:36,028 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-20 07:47:36,029 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-20 07:47:36,030 INFO L470 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2021-11-20 07:47:36,032 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 15.5) internal successors, (31), 2 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 07:47:36,032 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2021-11-20 07:47:36,061 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-20 07:47:36,062 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-20 07:47:36,062 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 07:47:36,063 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:47:36,063 INFO L85 PathProgramCache]: Analyzing trace with hash 1505552906, now seen corresponding path program 1 times [2021-11-20 07:47:36,063 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:47:36,064 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [131561797] [2021-11-20 07:47:36,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:47:36,064 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:47:36,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:47:36,225 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 07:47:36,226 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:47:36,226 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [131561797] [2021-11-20 07:47:36,226 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [131561797] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 07:47:36,229 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 07:47:36,230 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-20 07:47:36,230 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1860984677] [2021-11-20 07:47:36,230 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 07:47:36,232 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-20 07:47:36,232 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:47:36,234 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-20 07:47:36,235 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 07:47:36,235 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-20 07:47:36,237 INFO L470 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2021-11-20 07:47:36,237 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 11.333333333333334) internal successors, (34), 3 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 07:47:36,237 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2021-11-20 07:47:36,238 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2021-11-20 07:47:36,617 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-20 07:47:36,621 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-20 07:47:36,621 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-20 07:47:36,622 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 07:47:36,623 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:47:36,623 INFO L85 PathProgramCache]: Analyzing trace with hash 2091457107, now seen corresponding path program 1 times [2021-11-20 07:47:36,623 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:47:36,623 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [708556562] [2021-11-20 07:47:36,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:47:36,624 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:47:36,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:47:37,137 INFO L134 CoverageAnalysis]: Checked inductivity of 138 backedges. 80 proven. 13 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2021-11-20 07:47:37,138 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:47:37,138 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [708556562] [2021-11-20 07:47:37,138 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [708556562] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 07:47:37,139 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1272090513] [2021-11-20 07:47:37,139 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:47:37,139 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:47:37,139 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_759fe9e1-02b8-49e1-96c7-aa6e3659406a/bin/ugemcutter-b9s2R6iq4d/z3 [2021-11-20 07:47:37,141 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_759fe9e1-02b8-49e1-96c7-aa6e3659406a/bin/ugemcutter-b9s2R6iq4d/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 07:47:37,151 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_759fe9e1-02b8-49e1-96c7-aa6e3659406a/bin/ugemcutter-b9s2R6iq4d/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-20 07:47:37,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:47:37,315 INFO L263 TraceCheckSpWp]: Trace formula consists of 371 conjuncts, 42 conjunts are in the unsatisfiable core [2021-11-20 07:47:37,326 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:47:37,865 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-20 07:47:38,431 INFO L354 Elim1Store]: treesize reduction 15, result has 42.3 percent of original size [2021-11-20 07:47:38,432 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 31 [2021-11-20 07:47:38,527 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-11-20 07:47:38,637 INFO L134 CoverageAnalysis]: Checked inductivity of 138 backedges. 58 proven. 80 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 07:47:38,637 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 07:47:39,131 INFO L134 CoverageAnalysis]: Checked inductivity of 138 backedges. 82 proven. 0 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2021-11-20 07:47:39,132 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1272090513] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-20 07:47:39,132 INFO L186 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2021-11-20 07:47:39,133 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [10, 14] total 27 [2021-11-20 07:47:39,133 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [956715659] [2021-11-20 07:47:39,134 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 07:47:39,141 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-20 07:47:39,141 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:47:39,142 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-20 07:47:39,145 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=632, Unknown=0, NotChecked=0, Total=702 [2021-11-20 07:47:39,146 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-20 07:47:39,147 INFO L470 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2021-11-20 07:47:39,148 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 13.714285714285714) internal successors, (96), 7 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 07:47:39,148 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2021-11-20 07:47:39,149 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 3 states. [2021-11-20 07:47:39,149 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2021-11-20 07:47:39,758 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-20 07:47:39,759 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-20 07:47:39,759 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-20 07:47:39,806 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_759fe9e1-02b8-49e1-96c7-aa6e3659406a/bin/ugemcutter-b9s2R6iq4d/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2021-11-20 07:47:39,974 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_759fe9e1-02b8-49e1-96c7-aa6e3659406a/bin/ugemcutter-b9s2R6iq4d/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:47:39,974 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 07:47:39,975 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:47:39,975 INFO L85 PathProgramCache]: Analyzing trace with hash -1802307480, now seen corresponding path program 1 times [2021-11-20 07:47:39,975 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:47:39,975 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [430052278] [2021-11-20 07:47:39,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:47:39,976 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:47:40,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:47:40,508 INFO L134 CoverageAnalysis]: Checked inductivity of 467 backedges. 207 proven. 29 refuted. 0 times theorem prover too weak. 231 trivial. 0 not checked. [2021-11-20 07:47:40,509 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:47:40,509 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [430052278] [2021-11-20 07:47:40,510 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [430052278] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 07:47:40,510 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [875823818] [2021-11-20 07:47:40,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:47:40,510 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:47:40,511 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_759fe9e1-02b8-49e1-96c7-aa6e3659406a/bin/ugemcutter-b9s2R6iq4d/z3 [2021-11-20 07:47:40,512 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_759fe9e1-02b8-49e1-96c7-aa6e3659406a/bin/ugemcutter-b9s2R6iq4d/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 07:47:40,534 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_759fe9e1-02b8-49e1-96c7-aa6e3659406a/bin/ugemcutter-b9s2R6iq4d/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-20 07:47:40,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:47:40,740 INFO L263 TraceCheckSpWp]: Trace formula consists of 596 conjuncts, 33 conjunts are in the unsatisfiable core [2021-11-20 07:47:40,748 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:47:41,490 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-11-20 07:47:41,546 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 10 [2021-11-20 07:47:41,784 INFO L134 CoverageAnalysis]: Checked inductivity of 467 backedges. 207 proven. 29 refuted. 0 times theorem prover too weak. 231 trivial. 0 not checked. [2021-11-20 07:47:41,785 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 07:47:42,619 INFO L134 CoverageAnalysis]: Checked inductivity of 467 backedges. 207 proven. 16 refuted. 0 times theorem prover too weak. 244 trivial. 0 not checked. [2021-11-20 07:47:42,620 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [875823818] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 07:47:42,620 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 07:47:42,620 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 14, 9] total 27 [2021-11-20 07:47:42,621 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1136137449] [2021-11-20 07:47:42,621 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 07:47:42,623 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2021-11-20 07:47:42,623 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:47:42,624 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-11-20 07:47:42,625 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=606, Unknown=0, NotChecked=0, Total=702 [2021-11-20 07:47:42,625 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-20 07:47:42,625 INFO L470 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2021-11-20 07:47:42,626 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 7.62962962962963) internal successors, (206), 27 states have internal predecessors, (206), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 07:47:42,626 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2021-11-20 07:47:42,626 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 3 states. [2021-11-20 07:47:42,626 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 11 states. [2021-11-20 07:47:42,627 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2021-11-20 07:47:43,690 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-20 07:47:43,691 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-20 07:47:43,691 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-20 07:47:43,691 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-11-20 07:47:43,733 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_759fe9e1-02b8-49e1-96c7-aa6e3659406a/bin/ugemcutter-b9s2R6iq4d/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-20 07:47:43,917 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_759fe9e1-02b8-49e1-96c7-aa6e3659406a/bin/ugemcutter-b9s2R6iq4d/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:47:43,918 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 07:47:43,918 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:47:43,919 INFO L85 PathProgramCache]: Analyzing trace with hash -1342366375, now seen corresponding path program 2 times [2021-11-20 07:47:43,919 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:47:43,919 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2071725682] [2021-11-20 07:47:43,919 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:47:43,919 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:47:44,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:47:44,641 INFO L134 CoverageAnalysis]: Checked inductivity of 1090 backedges. 597 proven. 119 refuted. 0 times theorem prover too weak. 374 trivial. 0 not checked. [2021-11-20 07:47:44,641 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:47:44,641 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2071725682] [2021-11-20 07:47:44,642 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2071725682] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 07:47:44,642 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1084403142] [2021-11-20 07:47:44,642 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-20 07:47:44,642 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:47:44,643 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_759fe9e1-02b8-49e1-96c7-aa6e3659406a/bin/ugemcutter-b9s2R6iq4d/z3 [2021-11-20 07:47:44,644 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_759fe9e1-02b8-49e1-96c7-aa6e3659406a/bin/ugemcutter-b9s2R6iq4d/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 07:47:44,647 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_759fe9e1-02b8-49e1-96c7-aa6e3659406a/bin/ugemcutter-b9s2R6iq4d/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-20 07:47:44,889 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-20 07:47:44,889 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 07:47:44,918 INFO L263 TraceCheckSpWp]: Trace formula consists of 821 conjuncts, 95 conjunts are in the unsatisfiable core [2021-11-20 07:47:44,929 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:47:48,456 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-11-20 07:47:48,534 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 10 [2021-11-20 07:47:48,681 INFO L134 CoverageAnalysis]: Checked inductivity of 1090 backedges. 304 proven. 771 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-20 07:47:48,681 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 07:47:51,007 INFO L134 CoverageAnalysis]: Checked inductivity of 1090 backedges. 304 proven. 433 refuted. 0 times theorem prover too weak. 353 trivial. 0 not checked. [2021-11-20 07:47:51,008 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1084403142] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 07:47:51,008 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 07:47:51,008 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 45, 12] total 65 [2021-11-20 07:47:51,009 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [382388505] [2021-11-20 07:47:51,009 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 07:47:51,011 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 65 states [2021-11-20 07:47:51,011 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:47:51,012 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2021-11-20 07:47:51,014 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=310, Invalid=3850, Unknown=0, NotChecked=0, Total=4160 [2021-11-20 07:47:51,015 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-20 07:47:51,015 INFO L470 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2021-11-20 07:47:51,016 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 65 states, 65 states have (on average 7.153846153846154) internal successors, (465), 65 states have internal predecessors, (465), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 07:47:51,016 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2021-11-20 07:47:51,016 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 3 states. [2021-11-20 07:47:51,016 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 12 states. [2021-11-20 07:47:51,016 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 27 states. [2021-11-20 07:47:51,017 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2021-11-20 07:47:55,088 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-20 07:47:55,088 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-20 07:47:55,089 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-20 07:47:55,089 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-11-20 07:47:55,089 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2021-11-20 07:47:55,137 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_759fe9e1-02b8-49e1-96c7-aa6e3659406a/bin/ugemcutter-b9s2R6iq4d/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2021-11-20 07:47:55,309 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_759fe9e1-02b8-49e1-96c7-aa6e3659406a/bin/ugemcutter-b9s2R6iq4d/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:47:55,311 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 07:47:55,311 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:47:55,311 INFO L85 PathProgramCache]: Analyzing trace with hash -1442706536, now seen corresponding path program 3 times [2021-11-20 07:47:55,312 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:47:55,312 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [187712463] [2021-11-20 07:47:55,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:47:55,312 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:47:55,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:47:56,418 INFO L134 CoverageAnalysis]: Checked inductivity of 3363 backedges. 1712 proven. 234 refuted. 0 times theorem prover too weak. 1417 trivial. 0 not checked. [2021-11-20 07:47:56,418 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:47:56,419 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [187712463] [2021-11-20 07:47:56,419 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [187712463] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 07:47:56,419 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1442461364] [2021-11-20 07:47:56,419 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-20 07:47:56,420 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:47:56,420 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_759fe9e1-02b8-49e1-96c7-aa6e3659406a/bin/ugemcutter-b9s2R6iq4d/z3 [2021-11-20 07:47:56,426 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_759fe9e1-02b8-49e1-96c7-aa6e3659406a/bin/ugemcutter-b9s2R6iq4d/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 07:47:56,441 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_759fe9e1-02b8-49e1-96c7-aa6e3659406a/bin/ugemcutter-b9s2R6iq4d/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-20 07:47:56,727 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-11-20 07:47:56,727 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 07:47:56,731 INFO L263 TraceCheckSpWp]: Trace formula consists of 327 conjuncts, 50 conjunts are in the unsatisfiable core [2021-11-20 07:47:56,745 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:47:57,545 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-20 07:47:57,588 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 9 [2021-11-20 07:47:58,174 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-11-20 07:47:58,238 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 16 [2021-11-20 07:47:58,327 INFO L134 CoverageAnalysis]: Checked inductivity of 3363 backedges. 899 proven. 33 refuted. 0 times theorem prover too weak. 2431 trivial. 0 not checked. [2021-11-20 07:47:58,328 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 07:47:59,721 INFO L134 CoverageAnalysis]: Checked inductivity of 3363 backedges. 894 proven. 32 refuted. 0 times theorem prover too weak. 2437 trivial. 0 not checked. [2021-11-20 07:47:59,721 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1442461364] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 07:47:59,722 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 07:47:59,724 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 11] total 34 [2021-11-20 07:47:59,724 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1499564662] [2021-11-20 07:47:59,724 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 07:47:59,727 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2021-11-20 07:47:59,727 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:47:59,729 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-11-20 07:47:59,733 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=1022, Unknown=0, NotChecked=0, Total=1122 [2021-11-20 07:47:59,734 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-20 07:47:59,734 INFO L470 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2021-11-20 07:47:59,736 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 8.735294117647058) internal successors, (297), 34 states have internal predecessors, (297), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 07:47:59,736 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2021-11-20 07:47:59,737 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 3 states. [2021-11-20 07:47:59,737 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 12 states. [2021-11-20 07:47:59,737 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 27 states. [2021-11-20 07:47:59,737 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 65 states. [2021-11-20 07:47:59,737 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2021-11-20 07:48:07,144 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-20 07:48:07,145 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-20 07:48:07,145 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-20 07:48:07,145 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-11-20 07:48:07,146 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2021-11-20 07:48:07,146 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 109 states. [2021-11-20 07:48:07,151 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_759fe9e1-02b8-49e1-96c7-aa6e3659406a/bin/ugemcutter-b9s2R6iq4d/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-11-20 07:48:07,347 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_759fe9e1-02b8-49e1-96c7-aa6e3659406a/bin/ugemcutter-b9s2R6iq4d/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2021-11-20 07:48:07,347 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 07:48:07,348 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:48:07,348 INFO L85 PathProgramCache]: Analyzing trace with hash 440224461, now seen corresponding path program 4 times [2021-11-20 07:48:07,348 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:48:07,348 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [552921625] [2021-11-20 07:48:07,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:48:07,349 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:48:08,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:48:08,813 INFO L134 CoverageAnalysis]: Checked inductivity of 6103 backedges. 3156 proven. 562 refuted. 0 times theorem prover too weak. 2385 trivial. 0 not checked. [2021-11-20 07:48:08,814 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:48:08,814 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [552921625] [2021-11-20 07:48:08,814 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [552921625] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 07:48:08,816 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2015719237] [2021-11-20 07:48:08,817 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-20 07:48:08,819 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:48:08,820 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_759fe9e1-02b8-49e1-96c7-aa6e3659406a/bin/ugemcutter-b9s2R6iq4d/z3 [2021-11-20 07:48:08,822 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_759fe9e1-02b8-49e1-96c7-aa6e3659406a/bin/ugemcutter-b9s2R6iq4d/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 07:48:08,865 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_759fe9e1-02b8-49e1-96c7-aa6e3659406a/bin/ugemcutter-b9s2R6iq4d/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-11-20 07:48:10,332 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-20 07:48:10,333 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 07:48:10,357 INFO L263 TraceCheckSpWp]: Trace formula consists of 1706 conjuncts, 161 conjunts are in the unsatisfiable core [2021-11-20 07:48:10,369 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:48:16,483 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-11-20 07:48:16,561 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 10 [2021-11-20 07:48:16,895 INFO L134 CoverageAnalysis]: Checked inductivity of 6103 backedges. 2845 proven. 2625 refuted. 0 times theorem prover too weak. 633 trivial. 0 not checked. [2021-11-20 07:48:16,895 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 07:48:20,644 INFO L134 CoverageAnalysis]: Checked inductivity of 6103 backedges. 2845 proven. 1333 refuted. 0 times theorem prover too weak. 1925 trivial. 0 not checked. [2021-11-20 07:48:20,645 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2015719237] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 07:48:20,645 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 07:48:20,645 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 77, 12] total 96 [2021-11-20 07:48:20,645 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1589652631] [2021-11-20 07:48:20,646 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 07:48:20,647 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 96 states [2021-11-20 07:48:20,648 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:48:20,648 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 96 interpolants. [2021-11-20 07:48:20,652 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=467, Invalid=8653, Unknown=0, NotChecked=0, Total=9120 [2021-11-20 07:48:20,652 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-20 07:48:20,652 INFO L470 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2021-11-20 07:48:20,653 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 96 states, 96 states have (on average 6.4375) internal successors, (618), 96 states have internal predecessors, (618), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 07:48:20,654 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2021-11-20 07:48:20,654 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 3 states. [2021-11-20 07:48:20,654 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 13 states. [2021-11-20 07:48:20,654 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 27 states. [2021-11-20 07:48:20,654 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 66 states. [2021-11-20 07:48:20,654 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 109 states. [2021-11-20 07:48:20,655 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2021-11-20 07:48:28,041 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-20 07:48:28,041 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-20 07:48:28,041 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-20 07:48:28,041 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-11-20 07:48:28,042 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2021-11-20 07:48:28,042 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 121 states. [2021-11-20 07:48:28,042 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 102 states. [2021-11-20 07:48:28,078 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_759fe9e1-02b8-49e1-96c7-aa6e3659406a/bin/ugemcutter-b9s2R6iq4d/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-11-20 07:48:28,253 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_759fe9e1-02b8-49e1-96c7-aa6e3659406a/bin/ugemcutter-b9s2R6iq4d/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2021-11-20 07:48:28,254 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 07:48:28,255 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:48:28,255 INFO L85 PathProgramCache]: Analyzing trace with hash 1238865120, now seen corresponding path program 5 times [2021-11-20 07:48:28,255 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:48:28,255 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1456563276] [2021-11-20 07:48:28,255 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:48:28,256 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:48:29,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:48:29,832 INFO L134 CoverageAnalysis]: Checked inductivity of 21731 backedges. 10216 proven. 0 refuted. 0 times theorem prover too weak. 11515 trivial. 0 not checked. [2021-11-20 07:48:29,832 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:48:29,833 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1456563276] [2021-11-20 07:48:29,833 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1456563276] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 07:48:29,833 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 07:48:29,834 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-20 07:48:29,834 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [529437919] [2021-11-20 07:48:29,834 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 07:48:29,835 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-20 07:48:29,836 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:48:29,836 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-20 07:48:29,837 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 07:48:29,837 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-20 07:48:29,837 INFO L470 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2021-11-20 07:48:29,838 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 34.0) internal successors, (102), 3 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 07:48:29,838 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2021-11-20 07:48:29,838 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 3 states. [2021-11-20 07:48:29,838 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 13 states. [2021-11-20 07:48:29,838 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 27 states. [2021-11-20 07:48:29,839 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 66 states. [2021-11-20 07:48:29,839 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 121 states. [2021-11-20 07:48:29,839 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 102 states. [2021-11-20 07:48:29,839 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2021-11-20 07:48:30,018 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-20 07:48:30,019 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-20 07:48:30,019 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-20 07:48:30,019 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-11-20 07:48:30,019 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2021-11-20 07:48:30,019 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 121 states. [2021-11-20 07:48:30,020 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 102 states. [2021-11-20 07:48:30,020 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-20 07:48:30,020 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-11-20 07:48:30,021 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 07:48:30,021 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:48:30,022 INFO L85 PathProgramCache]: Analyzing trace with hash 1289619637, now seen corresponding path program 6 times [2021-11-20 07:48:30,022 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:48:30,022 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1691937437] [2021-11-20 07:48:30,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:48:30,023 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:48:32,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:48:33,989 INFO L134 CoverageAnalysis]: Checked inductivity of 21409 backedges. 10698 proven. 1454 refuted. 0 times theorem prover too weak. 9257 trivial. 0 not checked. [2021-11-20 07:48:33,989 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:48:33,990 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1691937437] [2021-11-20 07:48:33,990 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1691937437] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 07:48:33,990 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [529248751] [2021-11-20 07:48:33,990 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-20 07:48:33,990 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:48:33,991 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_759fe9e1-02b8-49e1-96c7-aa6e3659406a/bin/ugemcutter-b9s2R6iq4d/z3 [2021-11-20 07:48:33,998 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_759fe9e1-02b8-49e1-96c7-aa6e3659406a/bin/ugemcutter-b9s2R6iq4d/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 07:48:33,999 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_759fe9e1-02b8-49e1-96c7-aa6e3659406a/bin/ugemcutter-b9s2R6iq4d/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-11-20 07:48:36,070 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-11-20 07:48:36,070 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 07:48:36,076 INFO L263 TraceCheckSpWp]: Trace formula consists of 533 conjuncts, 63 conjunts are in the unsatisfiable core [2021-11-20 07:48:36,093 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:48:37,674 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-20 07:48:37,705 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-20 07:48:37,748 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 9 [2021-11-20 07:48:37,802 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-11-20 07:48:37,802 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2021-11-20 07:48:38,302 INFO L354 Elim1Store]: treesize reduction 23, result has 17.9 percent of original size [2021-11-20 07:48:38,302 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 21 [2021-11-20 07:48:38,396 WARN L322 ript$VariableManager]: TermVariabe |thr1Thread1of1ForFork0_~#l~0#1.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 07:48:38,438 INFO L354 Elim1Store]: treesize reduction 44, result has 30.2 percent of original size [2021-11-20 07:48:38,439 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 22 treesize of output 33 [2021-11-20 07:48:38,521 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-11-20 07:48:38,647 INFO L354 Elim1Store]: treesize reduction 23, result has 17.9 percent of original size [2021-11-20 07:48:38,647 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 21 [2021-11-20 07:48:38,812 INFO L354 Elim1Store]: treesize reduction 16, result has 36.0 percent of original size [2021-11-20 07:48:38,813 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 16 treesize of output 18 [2021-11-20 07:48:38,957 INFO L354 Elim1Store]: treesize reduction 29, result has 19.4 percent of original size [2021-11-20 07:48:38,958 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 48 treesize of output 47 [2021-11-20 07:48:39,134 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-11-20 07:48:39,135 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 62 treesize of output 42 [2021-11-20 07:48:39,284 INFO L134 CoverageAnalysis]: Checked inductivity of 21409 backedges. 3607 proven. 7 refuted. 0 times theorem prover too weak. 17795 trivial. 0 not checked. [2021-11-20 07:48:39,284 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 07:49:31,502 INFO L134 CoverageAnalysis]: Checked inductivity of 21409 backedges. 3606 proven. 8 refuted. 0 times theorem prover too weak. 17795 trivial. 0 not checked. [2021-11-20 07:49:31,502 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [529248751] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 07:49:31,503 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 07:49:31,504 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 47 [2021-11-20 07:49:31,504 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [859385003] [2021-11-20 07:49:31,504 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 07:49:31,507 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2021-11-20 07:49:31,508 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:49:31,508 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2021-11-20 07:49:31,509 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=148, Invalid=1996, Unknown=18, NotChecked=0, Total=2162 [2021-11-20 07:49:31,510 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-20 07:49:31,510 INFO L470 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2021-11-20 07:49:31,510 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 47 states have (on average 6.361702127659575) internal successors, (299), 47 states have internal predecessors, (299), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 07:49:31,511 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2021-11-20 07:49:31,511 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 3 states. [2021-11-20 07:49:31,511 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 13 states. [2021-11-20 07:49:31,511 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 27 states. [2021-11-20 07:49:31,511 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 66 states. [2021-11-20 07:49:31,511 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 121 states. [2021-11-20 07:49:31,512 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 102 states. [2021-11-20 07:49:31,512 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 3 states. [2021-11-20 07:49:31,512 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2021-11-20 07:50:43,115 WARN L227 SmtUtils]: Spent 5.87s on a formula simplification that was a NOOP. DAG size: 40 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-20 07:50:53,793 WARN L838 $PredicateComparison]: unable to prove that (let ((.cse0 (+ c_~s~0 1)) (.cse1 (+ 2 |c_ULTIMATE.start_thr1_#t~post4#1|)) (.cse2 (+ |c_thr1Thread1of1ForFork0_#t~mem3#1| 1))) (and (= (select |c_#valid| |c_thr1Thread1of1ForFork0_~#l~0#1.base|) 1) (forall ((|v_ULTIMATE.start_thr1_~#l~0#1.base_54| Int)) (or (not (= (select |c_#valid| |v_ULTIMATE.start_thr1_~#l~0#1.base_54|) 0)) (forall ((aux_div_~t~0_21 Int) (aux_mod_~t~0_21 Int) (|v_ULTIMATE.start___VERIFIER_atomic_fetch_and_inc_~l#1.offset_49| Int)) (or (<= 4294967296 aux_mod_~t~0_21) (< aux_mod_~t~0_21 0) (= aux_mod_~t~0_21 4294967295) (not (= (mod (select (select (store |c_#memory_int| |v_ULTIMATE.start_thr1_~#l~0#1.base_54| (store (select |c_#memory_int| |v_ULTIMATE.start_thr1_~#l~0#1.base_54|) |v_ULTIMATE.start___VERIFIER_atomic_fetch_and_inc_~l#1.offset_49| (+ aux_mod_~t~0_21 (* aux_div_~t~0_21 4294967296)))) |c_thr1Thread1of1ForFork0_~#l~0#1.base|) |c_thr1Thread1of1ForFork0_~#l~0#1.offset|) 4294967296) (mod c_~s~0 4294967296))))))) (<= .cse0 c_~t~0) (<= c_~t~0 .cse1) (<= |c_ULTIMATE.start_thr1_#t~post4#1| |c_thr1Thread1of1ForFork0_#t~mem3#1|) (<= |c_thr1Thread1of1ForFork0_#t~mem3#1| |c_ULTIMATE.start_thr1_#t~post4#1|) (<= .cse2 c_~s~0) (forall ((aux_div_~t~0_21 Int) (|v_ULTIMATE.start_thr1_~#l~0#1.base_54| Int) (aux_mod_~t~0_21 Int) (|v_ULTIMATE.start___VERIFIER_atomic_fetch_and_inc_~l#1.offset_49| Int)) (or (<= 4294967296 aux_mod_~t~0_21) (< aux_mod_~t~0_21 0) (not (= (select (store |c_#valid| |c_ULTIMATE.start_thr1_~#l~0#1.base| 0) |v_ULTIMATE.start_thr1_~#l~0#1.base_54|) 0)) (= aux_mod_~t~0_21 4294967295) (not (= (mod (select (select (store |c_#memory_int| |v_ULTIMATE.start_thr1_~#l~0#1.base_54| (store (select |c_#memory_int| |v_ULTIMATE.start_thr1_~#l~0#1.base_54|) |v_ULTIMATE.start___VERIFIER_atomic_fetch_and_inc_~l#1.offset_49| (+ aux_mod_~t~0_21 (* aux_div_~t~0_21 4294967296)))) |c_thr1Thread1of1ForFork0_~#l~0#1.base|) |c_thr1Thread1of1ForFork0_~#l~0#1.offset|) 4294967296) (mod c_~s~0 4294967296))))) (= (select |c_#valid| |c_ULTIMATE.start_thr1_~#l~0#1.base|) 1) (<= c_~t~0 .cse0) (= (mod (+ 4294967295 c_~s~0) 4294967296) (mod (+ 4294967294 c_~t~0) 4294967296)) (<= .cse1 c_~t~0) (not (= |c_thr1Thread1of1ForFork0_~#l~0#1.base| |c_ULTIMATE.start_thr1_~#l~0#1.base|)) (or (<= c_~s~0 .cse2) (< (div c_~s~0 4294967296) (+ (div |c_thr1Thread1of1ForFork0_#t~mem3#1| 4294967296) 1))) (= c_~t~0 (+ |c_thr1Thread1of1ForFork0_#t~mem3#1| 2)))) is different from false [2021-11-20 07:50:55,808 WARN L838 $PredicateComparison]: unable to prove that (let ((.cse0 (+ c_~s~0 1)) (.cse1 (+ |c_thr1Thread1of1ForFork0_#t~mem3#1| 1))) (and (= (select |c_#valid| |c_thr1Thread1of1ForFork0_~#l~0#1.base|) 1) (forall ((|v_ULTIMATE.start_thr1_~#l~0#1.base_54| Int)) (or (not (= (select |c_#valid| |v_ULTIMATE.start_thr1_~#l~0#1.base_54|) 0)) (forall ((aux_div_~t~0_21 Int) (aux_mod_~t~0_21 Int) (|v_ULTIMATE.start___VERIFIER_atomic_fetch_and_inc_~l#1.offset_49| Int)) (or (<= 4294967296 aux_mod_~t~0_21) (< aux_mod_~t~0_21 0) (= aux_mod_~t~0_21 4294967295) (not (= (mod (select (select (store |c_#memory_int| |v_ULTIMATE.start_thr1_~#l~0#1.base_54| (store (select |c_#memory_int| |v_ULTIMATE.start_thr1_~#l~0#1.base_54|) |v_ULTIMATE.start___VERIFIER_atomic_fetch_and_inc_~l#1.offset_49| (+ aux_mod_~t~0_21 (* aux_div_~t~0_21 4294967296)))) |c_thr1Thread1of1ForFork0_~#l~0#1.base|) |c_thr1Thread1of1ForFork0_~#l~0#1.offset|) 4294967296) (mod c_~s~0 4294967296))))))) (<= .cse0 c_~t~0) (<= .cse1 c_~s~0) (forall ((aux_div_~t~0_21 Int) (|v_ULTIMATE.start_thr1_~#l~0#1.base_54| Int) (aux_mod_~t~0_21 Int) (|v_ULTIMATE.start___VERIFIER_atomic_fetch_and_inc_~l#1.offset_49| Int)) (or (<= 4294967296 aux_mod_~t~0_21) (< aux_mod_~t~0_21 0) (not (= (select (store |c_#valid| |c_ULTIMATE.start_thr1_~#l~0#1.base| 0) |v_ULTIMATE.start_thr1_~#l~0#1.base_54|) 0)) (= aux_mod_~t~0_21 4294967295) (not (= (mod (select (select (store |c_#memory_int| |v_ULTIMATE.start_thr1_~#l~0#1.base_54| (store (select |c_#memory_int| |v_ULTIMATE.start_thr1_~#l~0#1.base_54|) |v_ULTIMATE.start___VERIFIER_atomic_fetch_and_inc_~l#1.offset_49| (+ aux_mod_~t~0_21 (* aux_div_~t~0_21 4294967296)))) |c_thr1Thread1of1ForFork0_~#l~0#1.base|) |c_thr1Thread1of1ForFork0_~#l~0#1.offset|) 4294967296) (mod c_~s~0 4294967296))))) (= (select |c_#valid| |c_ULTIMATE.start_thr1_~#l~0#1.base|) 1) (<= c_~t~0 .cse0) (= (mod (+ 4294967295 c_~s~0) 4294967296) (mod (+ 4294967294 c_~t~0) 4294967296)) (not (= |c_thr1Thread1of1ForFork0_~#l~0#1.base| |c_ULTIMATE.start_thr1_~#l~0#1.base|)) (or (<= c_~s~0 .cse1) (< (div c_~s~0 4294967296) (+ (div |c_thr1Thread1of1ForFork0_#t~mem3#1| 4294967296) 1))) (= c_~t~0 (+ |c_thr1Thread1of1ForFork0_#t~mem3#1| 2)))) is different from false [2021-11-20 07:50:57,845 WARN L838 $PredicateComparison]: unable to prove that (let ((.cse0 (+ c_~s~0 1))) (and (<= .cse0 c_~t~0) (forall ((aux_div_~t~0_21 Int) (|v_ULTIMATE.start_thr1_~#l~0#1.base_54| Int) (aux_mod_~t~0_21 Int) (|v_ULTIMATE.start___VERIFIER_atomic_fetch_and_inc_~l#1.offset_49| Int)) (or (<= 4294967296 aux_mod_~t~0_21) (< aux_mod_~t~0_21 0) (not (= (select (store |c_#valid| |c_ULTIMATE.start_thr1_~#l~0#1.base| 0) |v_ULTIMATE.start_thr1_~#l~0#1.base_54|) 0)) (= aux_mod_~t~0_21 4294967295) (not (= (mod (select (select (store |c_#memory_int| |v_ULTIMATE.start_thr1_~#l~0#1.base_54| (store (select |c_#memory_int| |v_ULTIMATE.start_thr1_~#l~0#1.base_54|) |v_ULTIMATE.start___VERIFIER_atomic_fetch_and_inc_~l#1.offset_49| (+ aux_mod_~t~0_21 (* aux_div_~t~0_21 4294967296)))) |c_thr1Thread1of1ForFork0_~#l~0#1.base|) |c_thr1Thread1of1ForFork0_~#l~0#1.offset|) 4294967296) (mod c_~s~0 4294967296))))) (<= c_~t~0 .cse0))) is different from false [2021-11-20 07:51:17,368 WARN L838 $PredicateComparison]: unable to prove that (and (= (select |c_#valid| |c_thr1Thread1of1ForFork0_~#l~0#1.base|) 1) (forall ((|v_ULTIMATE.start_thr1_~#l~0#1.base_54| Int)) (or (not (= (select |c_#valid| |v_ULTIMATE.start_thr1_~#l~0#1.base_54|) 0)) (forall ((aux_div_~t~0_21 Int) (aux_mod_~t~0_21 Int) (|v_ULTIMATE.start___VERIFIER_atomic_fetch_and_inc_~l#1.offset_49| Int)) (or (<= 4294967296 aux_mod_~t~0_21) (< aux_mod_~t~0_21 0) (= aux_mod_~t~0_21 4294967295) (not (= (mod (select (select (store |c_#memory_int| |v_ULTIMATE.start_thr1_~#l~0#1.base_54| (store (select |c_#memory_int| |v_ULTIMATE.start_thr1_~#l~0#1.base_54|) |v_ULTIMATE.start___VERIFIER_atomic_fetch_and_inc_~l#1.offset_49| (+ aux_mod_~t~0_21 (* aux_div_~t~0_21 4294967296)))) |c_thr1Thread1of1ForFork0_~#l~0#1.base|) |c_thr1Thread1of1ForFork0_~#l~0#1.offset|) 4294967296) (mod c_~s~0 4294967296))))))) (not (= (mod |c_thr1Thread1of1ForFork0_#t~mem3#1| 4294967296) (mod c_~s~0 4294967296))) (forall ((aux_div_~t~0_21 Int) (|v_ULTIMATE.start_thr1_~#l~0#1.base_54| Int) (aux_mod_~t~0_21 Int) (|v_ULTIMATE.start___VERIFIER_atomic_fetch_and_inc_~l#1.offset_49| Int)) (or (<= 4294967296 aux_mod_~t~0_21) (< aux_mod_~t~0_21 0) (not (= (select (store |c_#valid| |c_ULTIMATE.start_thr1_~#l~0#1.base| 0) |v_ULTIMATE.start_thr1_~#l~0#1.base_54|) 0)) (= aux_mod_~t~0_21 4294967295) (not (= (mod (select (select (store |c_#memory_int| |v_ULTIMATE.start_thr1_~#l~0#1.base_54| (store (select |c_#memory_int| |v_ULTIMATE.start_thr1_~#l~0#1.base_54|) |v_ULTIMATE.start___VERIFIER_atomic_fetch_and_inc_~l#1.offset_49| (+ aux_mod_~t~0_21 (* aux_div_~t~0_21 4294967296)))) |c_thr1Thread1of1ForFork0_~#l~0#1.base|) |c_thr1Thread1of1ForFork0_~#l~0#1.offset|) 4294967296) (mod c_~s~0 4294967296))))) (= (select |c_#valid| |c_ULTIMATE.start_thr1_~#l~0#1.base|) 1) (not (= |c_thr1Thread1of1ForFork0_~#l~0#1.base| |c_ULTIMATE.start_thr1_~#l~0#1.base|)) (= c_~t~0 (+ |c_thr1Thread1of1ForFork0_#t~mem3#1| 2))) is different from false [2021-11-20 07:51:23,546 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-20 07:51:23,547 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-20 07:51:23,547 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-20 07:51:23,547 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-11-20 07:51:23,547 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2021-11-20 07:51:23,547 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 122 states. [2021-11-20 07:51:23,548 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 102 states. [2021-11-20 07:51:23,548 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-20 07:51:23,548 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 92 states. [2021-11-20 07:51:23,557 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_759fe9e1-02b8-49e1-96c7-aa6e3659406a/bin/ugemcutter-b9s2R6iq4d/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-11-20 07:51:23,754 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_759fe9e1-02b8-49e1-96c7-aa6e3659406a/bin/ugemcutter-b9s2R6iq4d/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2021-11-20 07:51:23,754 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 07:51:23,754 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:51:23,755 INFO L85 PathProgramCache]: Analyzing trace with hash 383353012, now seen corresponding path program 1 times [2021-11-20 07:51:23,755 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:51:23,755 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [245499704] [2021-11-20 07:51:23,755 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:51:23,755 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:51:27,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:51:29,374 INFO L134 CoverageAnalysis]: Checked inductivity of 35400 backedges. 16505 proven. 1191 refuted. 0 times theorem prover too weak. 17704 trivial. 0 not checked. [2021-11-20 07:51:29,374 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:51:29,374 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [245499704] [2021-11-20 07:51:29,375 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [245499704] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 07:51:29,375 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [536477833] [2021-11-20 07:51:29,375 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:51:29,375 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:51:29,376 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_759fe9e1-02b8-49e1-96c7-aa6e3659406a/bin/ugemcutter-b9s2R6iq4d/z3 [2021-11-20 07:51:29,383 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_759fe9e1-02b8-49e1-96c7-aa6e3659406a/bin/ugemcutter-b9s2R6iq4d/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 07:51:29,409 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_759fe9e1-02b8-49e1-96c7-aa6e3659406a/bin/ugemcutter-b9s2R6iq4d/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-11-20 07:51:30,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:51:30,153 INFO L263 TraceCheckSpWp]: Trace formula consists of 4078 conjuncts, 26 conjunts are in the unsatisfiable core [2021-11-20 07:51:30,176 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:51:30,957 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-20 07:51:30,985 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-20 07:51:31,060 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-20 07:51:31,060 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2021-11-20 07:51:31,119 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-11-20 07:51:31,120 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 22 [2021-11-20 07:51:31,294 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2021-11-20 07:51:33,053 INFO L134 CoverageAnalysis]: Checked inductivity of 35400 backedges. 16929 proven. 3 refuted. 0 times theorem prover too weak. 18468 trivial. 0 not checked. [2021-11-20 07:51:33,053 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 07:51:39,895 INFO L134 CoverageAnalysis]: Checked inductivity of 35400 backedges. 16929 proven. 3 refuted. 0 times theorem prover too weak. 18468 trivial. 0 not checked. [2021-11-20 07:51:39,895 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [536477833] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 07:51:39,896 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 07:51:39,897 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 8, 9] total 27 [2021-11-20 07:51:39,897 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [185857896] [2021-11-20 07:51:39,897 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 07:51:39,900 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2021-11-20 07:51:39,900 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:51:39,901 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-11-20 07:51:39,901 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=627, Unknown=1, NotChecked=0, Total=702 [2021-11-20 07:51:39,901 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-20 07:51:39,901 INFO L470 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2021-11-20 07:51:39,902 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 9.37037037037037) internal successors, (253), 27 states have internal predecessors, (253), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 07:51:39,902 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2021-11-20 07:51:39,902 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 3 states. [2021-11-20 07:51:39,902 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 13 states. [2021-11-20 07:51:39,902 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 27 states. [2021-11-20 07:51:39,903 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 67 states. [2021-11-20 07:51:39,903 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 122 states. [2021-11-20 07:51:39,903 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 102 states. [2021-11-20 07:51:39,903 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 3 states. [2021-11-20 07:51:39,903 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 92 states. [2021-11-20 07:51:39,903 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2021-11-20 07:52:46,797 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-20 07:52:46,797 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-20 07:52:46,797 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-11-20 07:52:46,797 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-11-20 07:52:46,798 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 243 states. [2021-11-20 07:52:46,798 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 143 states. [2021-11-20 07:52:46,798 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 364 states. [2021-11-20 07:52:46,798 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-20 07:52:46,798 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 114 states. [2021-11-20 07:52:46,798 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 85 states. [2021-11-20 07:52:46,800 INFO L764 garLoopResultBuilder]: Registering result SAFE for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2021-11-20 07:52:46,827 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_759fe9e1-02b8-49e1-96c7-aa6e3659406a/bin/ugemcutter-b9s2R6iq4d/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2021-11-20 07:52:47,008 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_759fe9e1-02b8-49e1-96c7-aa6e3659406a/bin/ugemcutter-b9s2R6iq4d/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:52:47,017 INFO L732 BasicCegarLoop]: Path program histogram: [6, 1, 1, 1, 1] [2021-11-20 07:52:47,018 INFO L308 ceAbstractionStarter]: Result for error location thr1Thread1of1ForFork0 was SAFE (1/2) [2021-11-20 07:52:47,020 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 [2021-11-20 07:52:47,021 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_759fe9e1-02b8-49e1-96c7-aa6e3659406a/bin/ugemcutter-b9s2R6iq4d/z3 [2021-11-20 07:52:47,021 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_759fe9e1-02b8-49e1-96c7-aa6e3659406a/bin/ugemcutter-b9s2R6iq4d/z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 (exit command is (exit), workingDir is null) [2021-11-20 07:52:47,022 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_759fe9e1-02b8-49e1-96c7-aa6e3659406a/bin/ugemcutter-b9s2R6iq4d/z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 (10)] Waiting until timeout for monitored process [2021-11-20 07:52:47,023 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == ULTIMATE.start ======== [2021-11-20 07:52:47,024 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PARTIAL_ORDER_FA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-20 07:52:47,024 INFO L340 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-11-20 07:52:47,029 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION] === [2021-11-20 07:52:47,029 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:52:47,030 INFO L85 PathProgramCache]: Analyzing trace with hash 253472294, now seen corresponding path program 1 times [2021-11-20 07:52:47,030 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:52:47,030 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1773180799] [2021-11-20 07:52:47,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:52:47,030 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:52:47,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:52:47,042 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 07:52:47,042 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:52:47,042 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1773180799] [2021-11-20 07:52:47,042 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1773180799] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 07:52:47,043 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 07:52:47,043 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-20 07:52:47,043 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [931687277] [2021-11-20 07:52:47,043 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 07:52:47,043 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-20 07:52:47,044 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:52:47,044 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-20 07:52:47,044 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-20 07:52:47,044 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-20 07:52:47,045 INFO L470 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2021-11-20 07:52:47,045 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 14.5) internal successors, (29), 2 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 07:52:47,045 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2021-11-20 07:52:47,049 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-20 07:52:47,049 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-11-20 07:52:47,049 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION] === [2021-11-20 07:52:47,049 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:52:47,050 INFO L85 PathProgramCache]: Analyzing trace with hash 686024596, now seen corresponding path program 1 times [2021-11-20 07:52:47,050 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:52:47,050 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [832760024] [2021-11-20 07:52:47,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:52:47,050 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:52:47,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:52:47,070 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 07:52:47,070 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:52:47,070 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [832760024] [2021-11-20 07:52:47,070 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [832760024] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 07:52:47,071 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 07:52:47,071 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-20 07:52:47,071 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [799695911] [2021-11-20 07:52:47,071 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 07:52:47,072 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-20 07:52:47,072 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:52:47,072 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-20 07:52:47,072 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 07:52:47,072 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-20 07:52:47,073 INFO L470 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2021-11-20 07:52:47,073 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 11.333333333333334) internal successors, (34), 3 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 07:52:47,073 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2021-11-20 07:52:47,073 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2021-11-20 07:52:47,222 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-20 07:52:47,222 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-20 07:52:47,223 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-11-20 07:52:47,223 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION] === [2021-11-20 07:52:47,223 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:52:47,223 INFO L85 PathProgramCache]: Analyzing trace with hash 1348974463, now seen corresponding path program 1 times [2021-11-20 07:52:47,224 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:52:47,224 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1376696427] [2021-11-20 07:52:47,224 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:52:47,224 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:52:47,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:52:47,434 INFO L134 CoverageAnalysis]: Checked inductivity of 138 backedges. 80 proven. 11 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2021-11-20 07:52:47,434 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:52:47,434 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1376696427] [2021-11-20 07:52:47,434 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1376696427] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 07:52:47,434 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2043274473] [2021-11-20 07:52:47,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:52:47,435 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:52:47,435 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_759fe9e1-02b8-49e1-96c7-aa6e3659406a/bin/ugemcutter-b9s2R6iq4d/z3 [2021-11-20 07:52:47,437 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_759fe9e1-02b8-49e1-96c7-aa6e3659406a/bin/ugemcutter-b9s2R6iq4d/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 07:52:47,438 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_759fe9e1-02b8-49e1-96c7-aa6e3659406a/bin/ugemcutter-b9s2R6iq4d/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-11-20 07:52:47,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:52:47,535 INFO L263 TraceCheckSpWp]: Trace formula consists of 371 conjuncts, 35 conjunts are in the unsatisfiable core [2021-11-20 07:52:47,537 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:52:48,223 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-11-20 07:52:48,292 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 10 [2021-11-20 07:52:48,449 INFO L134 CoverageAnalysis]: Checked inductivity of 138 backedges. 80 proven. 11 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2021-11-20 07:52:48,449 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 07:52:48,954 INFO L134 CoverageAnalysis]: Checked inductivity of 138 backedges. 81 proven. 0 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2021-11-20 07:52:48,954 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2043274473] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-20 07:52:48,954 INFO L186 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2021-11-20 07:52:48,954 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [10, 13] total 24 [2021-11-20 07:52:48,954 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [862546574] [2021-11-20 07:52:48,954 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 07:52:48,955 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-20 07:52:48,955 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:52:48,955 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-20 07:52:48,955 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=462, Unknown=0, NotChecked=0, Total=552 [2021-11-20 07:52:48,955 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-20 07:52:48,955 INFO L470 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2021-11-20 07:52:48,956 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 07:52:48,956 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2021-11-20 07:52:48,956 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 3 states. [2021-11-20 07:52:48,956 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2021-11-20 07:52:49,363 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-20 07:52:49,364 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-20 07:52:49,365 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-11-20 07:52:49,402 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_759fe9e1-02b8-49e1-96c7-aa6e3659406a/bin/ugemcutter-b9s2R6iq4d/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-11-20 07:52:49,589 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_759fe9e1-02b8-49e1-96c7-aa6e3659406a/bin/ugemcutter-b9s2R6iq4d/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:52:49,590 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION] === [2021-11-20 07:52:49,590 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:52:49,590 INFO L85 PathProgramCache]: Analyzing trace with hash -512285101, now seen corresponding path program 1 times [2021-11-20 07:52:49,590 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:52:49,590 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1964016893] [2021-11-20 07:52:49,591 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:52:49,591 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:52:49,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:52:49,852 INFO L134 CoverageAnalysis]: Checked inductivity of 325 backedges. 165 proven. 27 refuted. 0 times theorem prover too weak. 133 trivial. 0 not checked. [2021-11-20 07:52:49,852 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:52:49,852 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1964016893] [2021-11-20 07:52:49,852 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1964016893] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 07:52:49,852 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [652260449] [2021-11-20 07:52:49,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:52:49,853 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:52:49,853 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_759fe9e1-02b8-49e1-96c7-aa6e3659406a/bin/ugemcutter-b9s2R6iq4d/z3 [2021-11-20 07:52:49,858 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_759fe9e1-02b8-49e1-96c7-aa6e3659406a/bin/ugemcutter-b9s2R6iq4d/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 07:52:49,885 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_759fe9e1-02b8-49e1-96c7-aa6e3659406a/bin/ugemcutter-b9s2R6iq4d/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-11-20 07:52:49,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:52:49,994 INFO L263 TraceCheckSpWp]: Trace formula consists of 508 conjuncts, 37 conjunts are in the unsatisfiable core [2021-11-20 07:52:49,997 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:52:50,877 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-11-20 07:52:50,933 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 10 [2021-11-20 07:52:51,133 INFO L134 CoverageAnalysis]: Checked inductivity of 325 backedges. 165 proven. 27 refuted. 0 times theorem prover too weak. 133 trivial. 0 not checked. [2021-11-20 07:52:51,133 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 07:52:51,783 INFO L134 CoverageAnalysis]: Checked inductivity of 325 backedges. 165 proven. 16 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2021-11-20 07:52:51,783 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [652260449] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 07:52:51,784 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 07:52:51,784 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 14, 9] total 27 [2021-11-20 07:52:51,784 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1686994389] [2021-11-20 07:52:51,784 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 07:52:51,785 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2021-11-20 07:52:51,785 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:52:51,785 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-11-20 07:52:51,786 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=606, Unknown=0, NotChecked=0, Total=702 [2021-11-20 07:52:51,786 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-20 07:52:51,786 INFO L470 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2021-11-20 07:52:51,787 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 7.2592592592592595) internal successors, (196), 27 states have internal predecessors, (196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 07:52:51,787 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2021-11-20 07:52:51,787 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 3 states. [2021-11-20 07:52:51,787 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 16 states. [2021-11-20 07:52:51,787 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2021-11-20 07:52:52,615 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-20 07:52:52,615 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-20 07:52:52,615 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-11-20 07:52:52,618 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-11-20 07:52:52,644 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_759fe9e1-02b8-49e1-96c7-aa6e3659406a/bin/ugemcutter-b9s2R6iq4d/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2021-11-20 07:52:52,826 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_759fe9e1-02b8-49e1-96c7-aa6e3659406a/bin/ugemcutter-b9s2R6iq4d/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-11-20 07:52:52,827 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION] === [2021-11-20 07:52:52,827 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:52:52,827 INFO L85 PathProgramCache]: Analyzing trace with hash -2111483099, now seen corresponding path program 2 times [2021-11-20 07:52:52,827 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:52:52,827 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1248533489] [2021-11-20 07:52:52,827 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:52:52,828 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:52:52,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:52:53,478 INFO L134 CoverageAnalysis]: Checked inductivity of 1013 backedges. 532 proven. 250 refuted. 0 times theorem prover too weak. 231 trivial. 0 not checked. [2021-11-20 07:52:53,478 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:52:53,479 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1248533489] [2021-11-20 07:52:53,479 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1248533489] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 07:52:53,479 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [792429793] [2021-11-20 07:52:53,479 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-20 07:52:53,479 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:52:53,479 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_759fe9e1-02b8-49e1-96c7-aa6e3659406a/bin/ugemcutter-b9s2R6iq4d/z3 [2021-11-20 07:52:53,482 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_759fe9e1-02b8-49e1-96c7-aa6e3659406a/bin/ugemcutter-b9s2R6iq4d/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 07:52:53,505 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_759fe9e1-02b8-49e1-96c7-aa6e3659406a/bin/ugemcutter-b9s2R6iq4d/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-11-20 07:52:53,642 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-20 07:52:53,643 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 07:52:53,647 INFO L263 TraceCheckSpWp]: Trace formula consists of 772 conjuncts, 101 conjunts are in the unsatisfiable core [2021-11-20 07:52:53,650 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:52:57,123 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-11-20 07:52:57,204 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 10 [2021-11-20 07:52:57,282 INFO L134 CoverageAnalysis]: Checked inductivity of 1013 backedges. 39 proven. 972 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-20 07:52:57,282 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 07:52:59,937 INFO L134 CoverageAnalysis]: Checked inductivity of 1013 backedges. 39 proven. 641 refuted. 0 times theorem prover too weak. 333 trivial. 0 not checked. [2021-11-20 07:52:59,938 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [792429793] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 07:52:59,938 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 07:52:59,938 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 48, 15] total 73 [2021-11-20 07:52:59,938 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1054060678] [2021-11-20 07:52:59,938 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 07:52:59,939 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 73 states [2021-11-20 07:52:59,940 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:52:59,940 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 73 interpolants. [2021-11-20 07:52:59,942 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=362, Invalid=4894, Unknown=0, NotChecked=0, Total=5256 [2021-11-20 07:52:59,942 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-20 07:52:59,943 INFO L470 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2021-11-20 07:52:59,944 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 73 states, 73 states have (on average 6.863013698630137) internal successors, (501), 73 states have internal predecessors, (501), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 07:52:59,944 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2021-11-20 07:52:59,944 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 3 states. [2021-11-20 07:52:59,944 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 16 states. [2021-11-20 07:52:59,944 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 27 states. [2021-11-20 07:52:59,944 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2021-11-20 07:53:10,250 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-20 07:53:10,251 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-20 07:53:10,251 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-11-20 07:53:10,251 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-11-20 07:53:10,251 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 112 states. [2021-11-20 07:53:10,275 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_759fe9e1-02b8-49e1-96c7-aa6e3659406a/bin/ugemcutter-b9s2R6iq4d/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2021-11-20 07:53:10,452 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_759fe9e1-02b8-49e1-96c7-aa6e3659406a/bin/ugemcutter-b9s2R6iq4d/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-11-20 07:53:10,452 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION] === [2021-11-20 07:53:10,453 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:53:10,453 INFO L85 PathProgramCache]: Analyzing trace with hash 1008553364, now seen corresponding path program 3 times [2021-11-20 07:53:10,453 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:53:10,453 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1297767936] [2021-11-20 07:53:10,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:53:10,453 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:53:10,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:53:11,652 INFO L134 CoverageAnalysis]: Checked inductivity of 7768 backedges. 3918 proven. 473 refuted. 0 times theorem prover too weak. 3377 trivial. 0 not checked. [2021-11-20 07:53:11,652 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:53:11,652 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1297767936] [2021-11-20 07:53:11,653 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1297767936] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 07:53:11,653 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [529349233] [2021-11-20 07:53:11,653 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-20 07:53:11,653 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:53:11,653 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_759fe9e1-02b8-49e1-96c7-aa6e3659406a/bin/ugemcutter-b9s2R6iq4d/z3 [2021-11-20 07:53:11,654 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_759fe9e1-02b8-49e1-96c7-aa6e3659406a/bin/ugemcutter-b9s2R6iq4d/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 07:53:11,660 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_759fe9e1-02b8-49e1-96c7-aa6e3659406a/bin/ugemcutter-b9s2R6iq4d/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-11-20 07:53:11,863 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-11-20 07:53:11,863 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 07:53:11,866 INFO L263 TraceCheckSpWp]: Trace formula consists of 249 conjuncts, 40 conjunts are in the unsatisfiable core [2021-11-20 07:53:11,875 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:53:12,855 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-20 07:53:13,279 INFO L354 Elim1Store]: treesize reduction 15, result has 42.3 percent of original size [2021-11-20 07:53:13,281 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 28 [2021-11-20 07:53:13,359 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-11-20 07:53:13,449 INFO L134 CoverageAnalysis]: Checked inductivity of 7768 backedges. 1020 proven. 0 refuted. 0 times theorem prover too weak. 6748 trivial. 0 not checked. [2021-11-20 07:53:13,450 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-20 07:53:13,450 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [529349233] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 07:53:13,450 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-20 07:53:13,451 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [15] total 26 [2021-11-20 07:53:13,451 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1805543521] [2021-11-20 07:53:13,451 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 07:53:13,451 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-20 07:53:13,452 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:53:13,452 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-20 07:53:13,452 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=591, Unknown=0, NotChecked=0, Total=650 [2021-11-20 07:53:13,452 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-20 07:53:13,453 INFO L470 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2021-11-20 07:53:13,453 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 8.76923076923077) internal successors, (114), 13 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) [2021-11-20 07:53:13,453 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2021-11-20 07:53:13,453 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 3 states. [2021-11-20 07:53:13,453 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 16 states. [2021-11-20 07:53:13,453 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 27 states. [2021-11-20 07:53:13,453 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 112 states. [2021-11-20 07:53:13,453 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2021-11-20 07:53:14,062 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-20 07:53:14,062 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-20 07:53:14,063 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-11-20 07:53:14,063 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-11-20 07:53:14,063 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 112 states. [2021-11-20 07:53:14,063 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-20 07:53:14,101 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_759fe9e1-02b8-49e1-96c7-aa6e3659406a/bin/ugemcutter-b9s2R6iq4d/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2021-11-20 07:53:14,264 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_759fe9e1-02b8-49e1-96c7-aa6e3659406a/bin/ugemcutter-b9s2R6iq4d/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-11-20 07:53:14,264 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION] === [2021-11-20 07:53:14,264 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:53:14,265 INFO L85 PathProgramCache]: Analyzing trace with hash -1657066405, now seen corresponding path program 1 times [2021-11-20 07:53:14,265 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:53:14,265 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1365143777] [2021-11-20 07:53:14,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:53:14,265 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:53:14,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:53:15,369 INFO L134 CoverageAnalysis]: Checked inductivity of 7382 backedges. 3758 proven. 473 refuted. 0 times theorem prover too weak. 3151 trivial. 0 not checked. [2021-11-20 07:53:15,369 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:53:15,369 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1365143777] [2021-11-20 07:53:15,369 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1365143777] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 07:53:15,369 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1065679637] [2021-11-20 07:53:15,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:53:15,370 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:53:15,370 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_759fe9e1-02b8-49e1-96c7-aa6e3659406a/bin/ugemcutter-b9s2R6iq4d/z3 [2021-11-20 07:53:15,374 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_759fe9e1-02b8-49e1-96c7-aa6e3659406a/bin/ugemcutter-b9s2R6iq4d/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 07:53:15,397 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_759fe9e1-02b8-49e1-96c7-aa6e3659406a/bin/ugemcutter-b9s2R6iq4d/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-11-20 07:53:15,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:53:15,983 INFO L263 TraceCheckSpWp]: Trace formula consists of 1887 conjuncts, 132 conjunts are in the unsatisfiable core [2021-11-20 07:53:15,991 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:53:20,316 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-20 07:53:20,810 INFO L354 Elim1Store]: treesize reduction 15, result has 42.3 percent of original size [2021-11-20 07:53:20,813 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 27 [2021-11-20 07:53:20,910 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 10 [2021-11-20 07:53:21,590 INFO L134 CoverageAnalysis]: Checked inductivity of 7382 backedges. 3758 proven. 1388 refuted. 0 times theorem prover too weak. 2236 trivial. 0 not checked. [2021-11-20 07:53:21,590 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 07:53:23,073 INFO L134 CoverageAnalysis]: Checked inductivity of 7382 backedges. 3877 proven. 0 refuted. 0 times theorem prover too weak. 3505 trivial. 0 not checked. [2021-11-20 07:53:23,074 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1065679637] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-20 07:53:23,074 INFO L186 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2021-11-20 07:53:23,074 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [15, 59] total 73 [2021-11-20 07:53:23,075 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1843758023] [2021-11-20 07:53:23,075 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 07:53:23,075 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-20 07:53:23,076 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:53:23,076 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-20 07:53:23,078 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=284, Invalid=4972, Unknown=0, NotChecked=0, Total=5256 [2021-11-20 07:53:23,078 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-20 07:53:23,078 INFO L470 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2021-11-20 07:53:23,078 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.285714285714285) internal successors, (114), 7 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) [2021-11-20 07:53:23,078 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2021-11-20 07:53:23,079 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 3 states. [2021-11-20 07:53:23,079 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 16 states. [2021-11-20 07:53:23,079 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 27 states. [2021-11-20 07:53:23,079 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 112 states. [2021-11-20 07:53:23,079 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 12 states. [2021-11-20 07:53:23,079 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2021-11-20 07:53:23,688 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-20 07:53:23,688 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-20 07:53:23,688 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-11-20 07:53:23,688 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-11-20 07:53:23,688 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 114 states. [2021-11-20 07:53:23,688 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-20 07:53:23,688 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-20 07:53:23,718 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_759fe9e1-02b8-49e1-96c7-aa6e3659406a/bin/ugemcutter-b9s2R6iq4d/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2021-11-20 07:53:23,889 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_759fe9e1-02b8-49e1-96c7-aa6e3659406a/bin/ugemcutter-b9s2R6iq4d/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-11-20 07:53:23,889 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION] === [2021-11-20 07:53:23,890 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:53:23,890 INFO L85 PathProgramCache]: Analyzing trace with hash 1435816375, now seen corresponding path program 2 times [2021-11-20 07:53:23,890 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:53:23,890 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [489486101] [2021-11-20 07:53:23,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:53:23,890 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:53:24,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:53:25,446 INFO L134 CoverageAnalysis]: Checked inductivity of 8327 backedges. 4239 proven. 924 refuted. 0 times theorem prover too weak. 3164 trivial. 0 not checked. [2021-11-20 07:53:25,447 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:53:25,447 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [489486101] [2021-11-20 07:53:25,447 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [489486101] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 07:53:25,447 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2145551904] [2021-11-20 07:53:25,447 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-20 07:53:25,448 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:53:25,448 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_759fe9e1-02b8-49e1-96c7-aa6e3659406a/bin/ugemcutter-b9s2R6iq4d/z3 [2021-11-20 07:53:25,450 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_759fe9e1-02b8-49e1-96c7-aa6e3659406a/bin/ugemcutter-b9s2R6iq4d/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 07:53:25,479 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_759fe9e1-02b8-49e1-96c7-aa6e3659406a/bin/ugemcutter-b9s2R6iq4d/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-11-20 07:53:25,896 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-20 07:53:25,896 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 07:53:25,905 INFO L263 TraceCheckSpWp]: Trace formula consists of 2029 conjuncts, 30 conjunts are in the unsatisfiable core [2021-11-20 07:53:25,915 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:53:26,631 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-20 07:53:26,704 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-11-20 07:53:26,705 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2021-11-20 07:53:26,749 INFO L354 Elim1Store]: treesize reduction 23, result has 17.9 percent of original size [2021-11-20 07:53:26,749 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 21 [2021-11-20 07:53:26,819 INFO L354 Elim1Store]: treesize reduction 16, result has 36.0 percent of original size [2021-11-20 07:53:26,819 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 16 treesize of output 18 [2021-11-20 07:53:26,854 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-20 07:53:26,920 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-11-20 07:53:26,921 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 22 [2021-11-20 07:53:27,069 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2021-11-20 07:53:27,449 INFO L134 CoverageAnalysis]: Checked inductivity of 8327 backedges. 4031 proven. 10 refuted. 0 times theorem prover too weak. 4286 trivial. 0 not checked. [2021-11-20 07:53:27,449 INFO L328 TraceCheckSpWp]: Computing backward predicates...