./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/loops-crafted-1/in-de31.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 5e519f3a Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1988c58-60f9-4fbf-bf85-a629a46711c4/bin/uautomizer-Dbtcem3rbc/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1988c58-60f9-4fbf-bf85-a629a46711c4/bin/uautomizer-Dbtcem3rbc/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1988c58-60f9-4fbf-bf85-a629a46711c4/bin/uautomizer-Dbtcem3rbc/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1988c58-60f9-4fbf-bf85-a629a46711c4/bin/uautomizer-Dbtcem3rbc/config/AutomizerReach.xml -i ../../sv-benchmarks/c/loops-crafted-1/in-de31.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1988c58-60f9-4fbf-bf85-a629a46711c4/bin/uautomizer-Dbtcem3rbc/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1988c58-60f9-4fbf-bf85-a629a46711c4/bin/uautomizer-Dbtcem3rbc --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 28f1f7a35f3c64149ac63836a12126d2f43ea1d4c4384507ba9d3ae156113818 --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-5e519f3 [2022-11-02 21:04:52,611 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-02 21:04:52,617 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-02 21:04:52,672 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-02 21:04:52,673 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-02 21:04:52,677 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-02 21:04:52,680 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-02 21:04:52,684 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-02 21:04:52,686 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-02 21:04:52,691 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-02 21:04:52,692 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-02 21:04:52,695 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-02 21:04:52,695 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-02 21:04:52,698 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-02 21:04:52,700 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-02 21:04:52,701 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-02 21:04:52,703 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-02 21:04:52,704 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-02 21:04:52,706 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-02 21:04:52,715 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-02 21:04:52,717 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-02 21:04:52,718 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-02 21:04:52,721 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-02 21:04:52,722 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-02 21:04:52,731 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-02 21:04:52,731 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-02 21:04:52,732 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-02 21:04:52,734 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-02 21:04:52,734 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-02 21:04:52,736 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-02 21:04:52,737 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-02 21:04:52,738 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-02 21:04:52,740 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-02 21:04:52,741 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-02 21:04:52,743 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-02 21:04:52,743 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-02 21:04:52,744 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-02 21:04:52,744 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-02 21:04:52,744 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-02 21:04:52,745 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-02 21:04:52,746 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-02 21:04:52,747 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1988c58-60f9-4fbf-bf85-a629a46711c4/bin/uautomizer-Dbtcem3rbc/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-11-02 21:04:52,787 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-02 21:04:52,788 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-02 21:04:52,788 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-02 21:04:52,789 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-02 21:04:52,790 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-02 21:04:52,790 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-02 21:04:52,791 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-02 21:04:52,791 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-02 21:04:52,791 INFO L138 SettingsManager]: * Use SBE=true [2022-11-02 21:04:52,792 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-02 21:04:52,793 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-02 21:04:52,793 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-02 21:04:52,794 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-02 21:04:52,794 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-02 21:04:52,794 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-02 21:04:52,794 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-02 21:04:52,795 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-02 21:04:52,795 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-02 21:04:52,795 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-02 21:04:52,795 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-02 21:04:52,796 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-02 21:04:52,796 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-02 21:04:52,796 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-02 21:04:52,796 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-02 21:04:52,797 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-02 21:04:52,797 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-02 21:04:52,799 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-02 21:04:52,799 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-02 21:04:52,799 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-02 21:04:52,800 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-02 21:04:52,800 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-11-02 21:04:52,800 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-11-02 21:04:52,801 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-02 21:04:52,801 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_e1988c58-60f9-4fbf-bf85-a629a46711c4/bin/uautomizer-Dbtcem3rbc/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1988c58-60f9-4fbf-bf85-a629a46711c4/bin/uautomizer-Dbtcem3rbc Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 28f1f7a35f3c64149ac63836a12126d2f43ea1d4c4384507ba9d3ae156113818 [2022-11-02 21:04:53,164 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-02 21:04:53,206 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-02 21:04:53,209 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-02 21:04:53,210 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-02 21:04:53,211 INFO L275 PluginConnector]: CDTParser initialized [2022-11-02 21:04:53,213 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1988c58-60f9-4fbf-bf85-a629a46711c4/bin/uautomizer-Dbtcem3rbc/../../sv-benchmarks/c/loops-crafted-1/in-de31.c [2022-11-02 21:04:53,286 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1988c58-60f9-4fbf-bf85-a629a46711c4/bin/uautomizer-Dbtcem3rbc/data/2733262d0/5e8eff2f9ae94f8cadee02d3b3e97ad4/FLAG98000aa03 [2022-11-02 21:04:53,769 INFO L306 CDTParser]: Found 1 translation units. [2022-11-02 21:04:53,770 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1988c58-60f9-4fbf-bf85-a629a46711c4/sv-benchmarks/c/loops-crafted-1/in-de31.c [2022-11-02 21:04:53,776 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1988c58-60f9-4fbf-bf85-a629a46711c4/bin/uautomizer-Dbtcem3rbc/data/2733262d0/5e8eff2f9ae94f8cadee02d3b3e97ad4/FLAG98000aa03 [2022-11-02 21:04:54,160 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1988c58-60f9-4fbf-bf85-a629a46711c4/bin/uautomizer-Dbtcem3rbc/data/2733262d0/5e8eff2f9ae94f8cadee02d3b3e97ad4 [2022-11-02 21:04:54,165 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-02 21:04:54,167 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-02 21:04:54,172 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-02 21:04:54,172 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-02 21:04:54,175 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-02 21:04:54,176 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.11 09:04:54" (1/1) ... [2022-11-02 21:04:54,178 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@76d7a8ba and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 09:04:54, skipping insertion in model container [2022-11-02 21:04:54,179 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.11 09:04:54" (1/1) ... [2022-11-02 21:04:54,187 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-02 21:04:54,201 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-02 21:04:54,422 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_e1988c58-60f9-4fbf-bf85-a629a46711c4/sv-benchmarks/c/loops-crafted-1/in-de31.c[368,381] [2022-11-02 21:04:54,436 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-02 21:04:54,445 INFO L203 MainTranslator]: Completed pre-run [2022-11-02 21:04:54,458 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_e1988c58-60f9-4fbf-bf85-a629a46711c4/sv-benchmarks/c/loops-crafted-1/in-de31.c[368,381] [2022-11-02 21:04:54,462 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-02 21:04:54,477 INFO L208 MainTranslator]: Completed translation [2022-11-02 21:04:54,478 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 09:04:54 WrapperNode [2022-11-02 21:04:54,478 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-02 21:04:54,481 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-02 21:04:54,481 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-02 21:04:54,482 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-02 21:04:54,490 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 09:04:54" (1/1) ... [2022-11-02 21:04:54,497 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 09:04:54" (1/1) ... [2022-11-02 21:04:54,521 INFO L138 Inliner]: procedures = 13, calls = 8, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 55 [2022-11-02 21:04:54,521 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-02 21:04:54,522 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-02 21:04:54,522 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-02 21:04:54,523 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-02 21:04:54,532 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 09:04:54" (1/1) ... [2022-11-02 21:04:54,532 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 09:04:54" (1/1) ... [2022-11-02 21:04:54,534 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 09:04:54" (1/1) ... [2022-11-02 21:04:54,535 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 09:04:54" (1/1) ... [2022-11-02 21:04:54,542 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 09:04:54" (1/1) ... [2022-11-02 21:04:54,546 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 09:04:54" (1/1) ... [2022-11-02 21:04:54,554 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 09:04:54" (1/1) ... [2022-11-02 21:04:54,556 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 09:04:54" (1/1) ... [2022-11-02 21:04:54,558 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-02 21:04:54,567 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-02 21:04:54,567 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-02 21:04:54,567 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-02 21:04:54,568 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 09:04:54" (1/1) ... [2022-11-02 21:04:54,576 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-02 21:04:54,589 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1988c58-60f9-4fbf-bf85-a629a46711c4/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 21:04:54,603 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1988c58-60f9-4fbf-bf85-a629a46711c4/bin/uautomizer-Dbtcem3rbc/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-02 21:04:54,610 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1988c58-60f9-4fbf-bf85-a629a46711c4/bin/uautomizer-Dbtcem3rbc/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-02 21:04:54,646 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-02 21:04:54,646 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-02 21:04:54,646 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-02 21:04:54,646 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-02 21:04:54,715 INFO L235 CfgBuilder]: Building ICFG [2022-11-02 21:04:54,718 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-02 21:04:54,841 INFO L276 CfgBuilder]: Performing block encoding [2022-11-02 21:04:54,847 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-02 21:04:54,847 INFO L300 CfgBuilder]: Removed 3 assume(true) statements. [2022-11-02 21:04:54,849 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.11 09:04:54 BoogieIcfgContainer [2022-11-02 21:04:54,849 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-02 21:04:54,851 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-02 21:04:54,851 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-02 21:04:54,855 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-02 21:04:54,855 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.11 09:04:54" (1/3) ... [2022-11-02 21:04:54,856 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@52dfacc4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.11 09:04:54, skipping insertion in model container [2022-11-02 21:04:54,856 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 09:04:54" (2/3) ... [2022-11-02 21:04:54,857 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@52dfacc4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.11 09:04:54, skipping insertion in model container [2022-11-02 21:04:54,857 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.11 09:04:54" (3/3) ... [2022-11-02 21:04:54,858 INFO L112 eAbstractionObserver]: Analyzing ICFG in-de31.c [2022-11-02 21:04:54,878 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-02 21:04:54,878 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-02 21:04:54,929 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-02 21:04:54,936 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@28934013, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-02 21:04:54,936 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-02 21:04:54,941 INFO L276 IsEmpty]: Start isEmpty. Operand has 14 states, 12 states have (on average 1.6666666666666667) internal successors, (20), 13 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 21:04:54,947 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-11-02 21:04:54,947 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 21:04:54,948 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 21:04:54,949 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 21:04:54,954 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 21:04:54,954 INFO L85 PathProgramCache]: Analyzing trace with hash -1157484939, now seen corresponding path program 1 times [2022-11-02 21:04:54,964 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 21:04:54,965 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2014985406] [2022-11-02 21:04:54,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 21:04:54,966 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 21:04:55,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:04:55,750 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 21:04:55,751 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 21:04:55,751 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2014985406] [2022-11-02 21:04:55,752 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2014985406] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 21:04:55,752 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 21:04:55,753 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-02 21:04:55,754 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1389563207] [2022-11-02 21:04:55,755 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 21:04:55,760 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-02 21:04:55,763 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 21:04:55,809 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-02 21:04:55,811 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-02 21:04:55,813 INFO L87 Difference]: Start difference. First operand has 14 states, 12 states have (on average 1.6666666666666667) internal successors, (20), 13 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 6 states, 6 states have (on average 1.5) internal successors, (9), 6 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 21:04:56,083 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 21:04:56,083 INFO L93 Difference]: Finished difference Result 35 states and 51 transitions. [2022-11-02 21:04:56,085 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-02 21:04:56,086 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 1.5) internal successors, (9), 6 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2022-11-02 21:04:56,087 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 21:04:56,094 INFO L225 Difference]: With dead ends: 35 [2022-11-02 21:04:56,095 INFO L226 Difference]: Without dead ends: 11 [2022-11-02 21:04:56,098 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2022-11-02 21:04:56,102 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 29 mSDsluCounter, 31 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 38 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-02 21:04:56,103 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [29 Valid, 40 Invalid, 38 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-02 21:04:56,121 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11 states. [2022-11-02 21:04:56,131 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11 to 11. [2022-11-02 21:04:56,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11 states, 10 states have (on average 1.3) internal successors, (13), 10 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 21:04:56,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 13 transitions. [2022-11-02 21:04:56,135 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 13 transitions. Word has length 9 [2022-11-02 21:04:56,135 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 21:04:56,135 INFO L495 AbstractCegarLoop]: Abstraction has 11 states and 13 transitions. [2022-11-02 21:04:56,136 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 1.5) internal successors, (9), 6 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 21:04:56,136 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 13 transitions. [2022-11-02 21:04:56,136 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-11-02 21:04:56,136 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 21:04:56,137 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 21:04:56,137 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-02 21:04:56,137 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 21:04:56,138 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 21:04:56,138 INFO L85 PathProgramCache]: Analyzing trace with hash 722526704, now seen corresponding path program 1 times [2022-11-02 21:04:56,138 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 21:04:56,138 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1762998953] [2022-11-02 21:04:56,138 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 21:04:56,139 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 21:04:56,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:04:56,255 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 21:04:56,255 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 21:04:56,255 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1762998953] [2022-11-02 21:04:56,255 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1762998953] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 21:04:56,256 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2003721929] [2022-11-02 21:04:56,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 21:04:56,256 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 21:04:56,256 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1988c58-60f9-4fbf-bf85-a629a46711c4/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 21:04:56,259 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1988c58-60f9-4fbf-bf85-a629a46711c4/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 21:04:56,265 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1988c58-60f9-4fbf-bf85-a629a46711c4/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-02 21:04:56,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:04:56,313 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-02 21:04:56,318 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 21:04:56,437 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 21:04:56,438 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 21:04:56,517 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 21:04:56,522 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2003721929] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 21:04:56,527 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 21:04:56,527 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 9 [2022-11-02 21:04:56,528 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1744097960] [2022-11-02 21:04:56,528 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 21:04:56,529 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-02 21:04:56,529 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 21:04:56,530 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-02 21:04:56,530 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2022-11-02 21:04:56,531 INFO L87 Difference]: Start difference. First operand 11 states and 13 transitions. Second operand has 9 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 9 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 21:04:56,699 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 21:04:56,700 INFO L93 Difference]: Finished difference Result 37 states and 52 transitions. [2022-11-02 21:04:56,700 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-02 21:04:56,701 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 9 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2022-11-02 21:04:56,701 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 21:04:56,705 INFO L225 Difference]: With dead ends: 37 [2022-11-02 21:04:56,705 INFO L226 Difference]: Without dead ends: 32 [2022-11-02 21:04:56,708 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2022-11-02 21:04:56,711 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 29 mSDsluCounter, 25 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 60 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-02 21:04:56,716 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [29 Valid, 32 Invalid, 60 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-02 21:04:56,719 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2022-11-02 21:04:56,724 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 23. [2022-11-02 21:04:56,724 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 22 states have (on average 1.3636363636363635) internal successors, (30), 22 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 21:04:56,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 30 transitions. [2022-11-02 21:04:56,725 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 30 transitions. Word has length 10 [2022-11-02 21:04:56,725 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 21:04:56,726 INFO L495 AbstractCegarLoop]: Abstraction has 23 states and 30 transitions. [2022-11-02 21:04:56,726 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 9 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 21:04:56,726 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 30 transitions. [2022-11-02 21:04:56,727 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-11-02 21:04:56,727 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 21:04:56,727 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 21:04:56,762 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1988c58-60f9-4fbf-bf85-a629a46711c4/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-11-02 21:04:56,927 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1988c58-60f9-4fbf-bf85-a629a46711c4/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 21:04:56,928 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 21:04:56,928 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 21:04:56,928 INFO L85 PathProgramCache]: Analyzing trace with hash 19581631, now seen corresponding path program 1 times [2022-11-02 21:04:56,929 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 21:04:56,929 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1378270325] [2022-11-02 21:04:56,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 21:04:56,929 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 21:04:56,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:04:57,467 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 21:04:57,468 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 21:04:57,468 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1378270325] [2022-11-02 21:04:57,468 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1378270325] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 21:04:57,468 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1699629596] [2022-11-02 21:04:57,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 21:04:57,469 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 21:04:57,469 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1988c58-60f9-4fbf-bf85-a629a46711c4/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 21:04:57,475 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1988c58-60f9-4fbf-bf85-a629a46711c4/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 21:04:57,484 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1988c58-60f9-4fbf-bf85-a629a46711c4/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-02 21:04:57,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:04:57,533 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-02 21:04:57,535 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 21:04:57,804 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 21:04:57,804 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 21:04:58,252 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 21:04:58,252 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1699629596] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 21:04:58,252 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 21:04:58,252 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 9] total 19 [2022-11-02 21:04:58,253 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1866848034] [2022-11-02 21:04:58,253 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 21:04:58,253 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-11-02 21:04:58,253 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 21:04:58,254 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-11-02 21:04:58,254 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=281, Unknown=0, NotChecked=0, Total=342 [2022-11-02 21:04:58,255 INFO L87 Difference]: Start difference. First operand 23 states and 30 transitions. Second operand has 19 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 19 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) [2022-11-02 21:05:00,016 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 21:05:00,017 INFO L93 Difference]: Finished difference Result 59 states and 71 transitions. [2022-11-02 21:05:00,018 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-11-02 21:05:00,018 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 19 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) Word has length 12 [2022-11-02 21:05:00,019 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 21:05:00,019 INFO L225 Difference]: With dead ends: 59 [2022-11-02 21:05:00,020 INFO L226 Difference]: Without dead ends: 43 [2022-11-02 21:05:00,021 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 322 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=276, Invalid=1130, Unknown=0, NotChecked=0, Total=1406 [2022-11-02 21:05:00,022 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 90 mSDsluCounter, 35 mSDsCounter, 0 mSdLazyCounter, 127 mSolverCounterSat, 54 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 90 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 181 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 54 IncrementalHoareTripleChecker+Valid, 127 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-02 21:05:00,023 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [90 Valid, 40 Invalid, 181 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [54 Valid, 127 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-02 21:05:00,024 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2022-11-02 21:05:00,035 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 20. [2022-11-02 21:05:00,036 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 19 states have (on average 1.368421052631579) internal successors, (26), 19 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 21:05:00,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 26 transitions. [2022-11-02 21:05:00,037 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 26 transitions. Word has length 12 [2022-11-02 21:05:00,037 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 21:05:00,037 INFO L495 AbstractCegarLoop]: Abstraction has 20 states and 26 transitions. [2022-11-02 21:05:00,038 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 19 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) [2022-11-02 21:05:00,038 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 26 transitions. [2022-11-02 21:05:00,038 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-02 21:05:00,039 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 21:05:00,039 INFO L195 NwaCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 21:05:00,075 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1988c58-60f9-4fbf-bf85-a629a46711c4/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-02 21:05:00,259 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1988c58-60f9-4fbf-bf85-a629a46711c4/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 21:05:00,260 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 21:05:00,260 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 21:05:00,260 INFO L85 PathProgramCache]: Analyzing trace with hash -1563380427, now seen corresponding path program 2 times [2022-11-02 21:05:00,261 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 21:05:00,261 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1078969368] [2022-11-02 21:05:00,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 21:05:00,261 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 21:05:00,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:05:00,421 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 21:05:00,422 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 21:05:00,422 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1078969368] [2022-11-02 21:05:00,422 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1078969368] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 21:05:00,425 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1360719535] [2022-11-02 21:05:00,426 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-02 21:05:00,429 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 21:05:00,430 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1988c58-60f9-4fbf-bf85-a629a46711c4/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 21:05:00,431 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1988c58-60f9-4fbf-bf85-a629a46711c4/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 21:05:00,439 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1988c58-60f9-4fbf-bf85-a629a46711c4/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-02 21:05:00,486 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-02 21:05:00,487 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-02 21:05:00,488 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 13 conjunts are in the unsatisfiable core [2022-11-02 21:05:00,489 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 21:05:00,578 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 21:05:00,579 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 21:05:00,705 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 21:05:00,705 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1360719535] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 21:05:00,705 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 21:05:00,705 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 15 [2022-11-02 21:05:00,705 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1434476040] [2022-11-02 21:05:00,706 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 21:05:00,706 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-11-02 21:05:00,706 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 21:05:00,707 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-11-02 21:05:00,707 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2022-11-02 21:05:00,707 INFO L87 Difference]: Start difference. First operand 20 states and 26 transitions. Second operand has 15 states, 15 states have (on average 1.5333333333333334) internal successors, (23), 15 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 21:05:01,688 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 21:05:01,688 INFO L93 Difference]: Finished difference Result 75 states and 115 transitions. [2022-11-02 21:05:01,689 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-11-02 21:05:01,689 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.5333333333333334) internal successors, (23), 15 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2022-11-02 21:05:01,689 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 21:05:01,690 INFO L225 Difference]: With dead ends: 75 [2022-11-02 21:05:01,690 INFO L226 Difference]: Without dead ends: 70 [2022-11-02 21:05:01,691 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 174 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=280, Invalid=650, Unknown=0, NotChecked=0, Total=930 [2022-11-02 21:05:01,692 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 146 mSDsluCounter, 55 mSDsCounter, 0 mSdLazyCounter, 119 mSolverCounterSat, 103 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 146 SdHoareTripleChecker+Valid, 66 SdHoareTripleChecker+Invalid, 222 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 103 IncrementalHoareTripleChecker+Valid, 119 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-02 21:05:01,692 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [146 Valid, 66 Invalid, 222 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [103 Valid, 119 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-02 21:05:01,693 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2022-11-02 21:05:01,712 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 39. [2022-11-02 21:05:01,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 38 states have (on average 1.394736842105263) internal successors, (53), 38 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 21:05:01,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 53 transitions. [2022-11-02 21:05:01,714 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 53 transitions. Word has length 13 [2022-11-02 21:05:01,714 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 21:05:01,714 INFO L495 AbstractCegarLoop]: Abstraction has 39 states and 53 transitions. [2022-11-02 21:05:01,714 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.5333333333333334) internal successors, (23), 15 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 21:05:01,714 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 53 transitions. [2022-11-02 21:05:01,715 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-11-02 21:05:01,715 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 21:05:01,715 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 21:05:01,750 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1988c58-60f9-4fbf-bf85-a629a46711c4/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-02 21:05:01,938 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1988c58-60f9-4fbf-bf85-a629a46711c4/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 21:05:01,938 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 21:05:01,939 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 21:05:01,939 INFO L85 PathProgramCache]: Analyzing trace with hash -1098222449, now seen corresponding path program 2 times [2022-11-02 21:05:01,939 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 21:05:01,939 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2033869082] [2022-11-02 21:05:01,939 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 21:05:01,939 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 21:05:01,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:05:02,067 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-02 21:05:02,067 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 21:05:02,067 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2033869082] [2022-11-02 21:05:02,068 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2033869082] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 21:05:02,068 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1138319957] [2022-11-02 21:05:02,068 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-02 21:05:02,068 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 21:05:02,068 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1988c58-60f9-4fbf-bf85-a629a46711c4/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 21:05:02,069 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1988c58-60f9-4fbf-bf85-a629a46711c4/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 21:05:02,086 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1988c58-60f9-4fbf-bf85-a629a46711c4/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-02 21:05:02,114 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-02 21:05:02,114 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-02 21:05:02,115 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-02 21:05:02,116 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 21:05:02,181 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-02 21:05:02,181 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 21:05:02,264 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-02 21:05:02,264 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1138319957] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 21:05:02,265 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 21:05:02,265 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 6] total 13 [2022-11-02 21:05:02,265 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1337954492] [2022-11-02 21:05:02,265 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 21:05:02,265 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-11-02 21:05:02,266 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 21:05:02,266 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-11-02 21:05:02,266 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2022-11-02 21:05:02,266 INFO L87 Difference]: Start difference. First operand 39 states and 53 transitions. Second operand has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 21:05:02,491 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 21:05:02,491 INFO L93 Difference]: Finished difference Result 72 states and 94 transitions. [2022-11-02 21:05:02,492 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-02 21:05:02,492 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2022-11-02 21:05:02,492 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 21:05:02,493 INFO L225 Difference]: With dead ends: 72 [2022-11-02 21:05:02,493 INFO L226 Difference]: Without dead ends: 62 [2022-11-02 21:05:02,494 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=56, Invalid=184, Unknown=0, NotChecked=0, Total=240 [2022-11-02 21:05:02,495 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 18 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 82 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 103 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 82 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-02 21:05:02,495 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 34 Invalid, 103 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 82 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-02 21:05:02,496 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2022-11-02 21:05:02,521 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 46. [2022-11-02 21:05:02,522 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 45 states have (on average 1.4222222222222223) internal successors, (64), 45 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 21:05:02,524 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 64 transitions. [2022-11-02 21:05:02,525 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 64 transitions. Word has length 14 [2022-11-02 21:05:02,525 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 21:05:02,525 INFO L495 AbstractCegarLoop]: Abstraction has 46 states and 64 transitions. [2022-11-02 21:05:02,525 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 21:05:02,525 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 64 transitions. [2022-11-02 21:05:02,527 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-11-02 21:05:02,527 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 21:05:02,527 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 21:05:02,565 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1988c58-60f9-4fbf-bf85-a629a46711c4/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-02 21:05:02,750 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1988c58-60f9-4fbf-bf85-a629a46711c4/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 21:05:02,750 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 21:05:02,751 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 21:05:02,751 INFO L85 PathProgramCache]: Analyzing trace with hash 854515253, now seen corresponding path program 3 times [2022-11-02 21:05:02,751 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 21:05:02,751 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [912309086] [2022-11-02 21:05:02,751 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 21:05:02,751 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 21:05:02,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:05:03,394 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 21:05:03,394 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 21:05:03,394 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [912309086] [2022-11-02 21:05:03,394 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [912309086] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 21:05:03,394 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1153358813] [2022-11-02 21:05:03,395 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-02 21:05:03,395 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 21:05:03,395 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1988c58-60f9-4fbf-bf85-a629a46711c4/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 21:05:03,397 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1988c58-60f9-4fbf-bf85-a629a46711c4/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 21:05:03,418 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1988c58-60f9-4fbf-bf85-a629a46711c4/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-02 21:05:03,458 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-02 21:05:03,459 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-02 21:05:03,460 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 30 conjunts are in the unsatisfiable core [2022-11-02 21:05:03,461 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 21:05:03,783 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 21:05:03,784 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 21:05:04,162 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 21:05:04,163 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1153358813] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 21:05:04,163 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 21:05:04,164 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12, 10] total 27 [2022-11-02 21:05:04,164 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [890901510] [2022-11-02 21:05:04,164 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 21:05:04,164 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-11-02 21:05:04,165 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 21:05:04,166 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-11-02 21:05:04,166 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=599, Unknown=0, NotChecked=0, Total=702 [2022-11-02 21:05:04,167 INFO L87 Difference]: Start difference. First operand 46 states and 64 transitions. Second operand has 27 states, 27 states have (on average 1.4444444444444444) internal successors, (39), 27 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 21:05:05,615 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 21:05:05,615 INFO L93 Difference]: Finished difference Result 97 states and 120 transitions. [2022-11-02 21:05:05,615 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-11-02 21:05:05,616 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.4444444444444444) internal successors, (39), 27 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-11-02 21:05:05,616 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 21:05:05,616 INFO L225 Difference]: With dead ends: 97 [2022-11-02 21:05:05,616 INFO L226 Difference]: Without dead ends: 73 [2022-11-02 21:05:05,617 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 515 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=276, Invalid=1704, Unknown=0, NotChecked=0, Total=1980 [2022-11-02 21:05:05,618 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 60 mSDsluCounter, 79 mSDsCounter, 0 mSdLazyCounter, 276 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 89 SdHoareTripleChecker+Invalid, 316 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 276 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-02 21:05:05,618 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [60 Valid, 89 Invalid, 316 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 276 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-02 21:05:05,619 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2022-11-02 21:05:05,644 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 46. [2022-11-02 21:05:05,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 45 states have (on average 1.4) internal successors, (63), 45 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 21:05:05,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 63 transitions. [2022-11-02 21:05:05,647 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 63 transitions. Word has length 15 [2022-11-02 21:05:05,647 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 21:05:05,647 INFO L495 AbstractCegarLoop]: Abstraction has 46 states and 63 transitions. [2022-11-02 21:05:05,648 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.4444444444444444) internal successors, (39), 27 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 21:05:05,648 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 63 transitions. [2022-11-02 21:05:05,649 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-11-02 21:05:05,649 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 21:05:05,649 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 21:05:05,686 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1988c58-60f9-4fbf-bf85-a629a46711c4/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-02 21:05:05,875 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1988c58-60f9-4fbf-bf85-a629a46711c4/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2022-11-02 21:05:05,875 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 21:05:05,876 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 21:05:05,876 INFO L85 PathProgramCache]: Analyzing trace with hash -1966551549, now seen corresponding path program 4 times [2022-11-02 21:05:05,876 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 21:05:05,876 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1920709153] [2022-11-02 21:05:05,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 21:05:05,876 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 21:05:05,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:05:06,037 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-02 21:05:06,037 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 21:05:06,037 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1920709153] [2022-11-02 21:05:06,037 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1920709153] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 21:05:06,037 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1607745225] [2022-11-02 21:05:06,037 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-02 21:05:06,038 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 21:05:06,042 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1988c58-60f9-4fbf-bf85-a629a46711c4/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 21:05:06,044 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1988c58-60f9-4fbf-bf85-a629a46711c4/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 21:05:06,050 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1988c58-60f9-4fbf-bf85-a629a46711c4/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-02 21:05:06,093 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-02 21:05:06,094 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-02 21:05:06,095 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-02 21:05:06,096 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 21:05:06,180 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-02 21:05:06,181 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 21:05:06,336 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-02 21:05:06,337 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1607745225] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 21:05:06,337 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 21:05:06,337 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 8] total 18 [2022-11-02 21:05:06,337 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [392402617] [2022-11-02 21:05:06,337 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 21:05:06,338 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-11-02 21:05:06,338 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 21:05:06,338 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-11-02 21:05:06,339 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=241, Unknown=0, NotChecked=0, Total=306 [2022-11-02 21:05:06,339 INFO L87 Difference]: Start difference. First operand 46 states and 63 transitions. Second operand has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 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) [2022-11-02 21:05:06,787 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 21:05:06,788 INFO L93 Difference]: Finished difference Result 84 states and 110 transitions. [2022-11-02 21:05:06,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-11-02 21:05:06,789 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 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) Word has length 17 [2022-11-02 21:05:06,789 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 21:05:06,790 INFO L225 Difference]: With dead ends: 84 [2022-11-02 21:05:06,790 INFO L226 Difference]: Without dead ends: 69 [2022-11-02 21:05:06,790 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=101, Invalid=405, Unknown=0, NotChecked=0, Total=506 [2022-11-02 21:05:06,791 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 22 mSDsluCounter, 69 mSDsCounter, 0 mSdLazyCounter, 201 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 81 SdHoareTripleChecker+Invalid, 233 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 201 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-02 21:05:06,791 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [22 Valid, 81 Invalid, 233 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 201 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-02 21:05:06,792 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2022-11-02 21:05:06,828 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 51. [2022-11-02 21:05:06,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 50 states have (on average 1.38) internal successors, (69), 50 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 21:05:06,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 69 transitions. [2022-11-02 21:05:06,833 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 69 transitions. Word has length 17 [2022-11-02 21:05:06,833 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 21:05:06,833 INFO L495 AbstractCegarLoop]: Abstraction has 51 states and 69 transitions. [2022-11-02 21:05:06,833 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 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) [2022-11-02 21:05:06,834 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 69 transitions. [2022-11-02 21:05:06,834 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-11-02 21:05:06,834 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 21:05:06,834 INFO L195 NwaCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 21:05:06,873 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1988c58-60f9-4fbf-bf85-a629a46711c4/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-02 21:05:07,054 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1988c58-60f9-4fbf-bf85-a629a46711c4/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 21:05:07,055 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 21:05:07,055 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 21:05:07,055 INFO L85 PathProgramCache]: Analyzing trace with hash -73381852, now seen corresponding path program 5 times [2022-11-02 21:05:07,055 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 21:05:07,055 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [853038831] [2022-11-02 21:05:07,055 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 21:05:07,055 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 21:05:07,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:05:07,226 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-02 21:05:07,227 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 21:05:07,227 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [853038831] [2022-11-02 21:05:07,227 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [853038831] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 21:05:07,227 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [921579164] [2022-11-02 21:05:07,227 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-02 21:05:07,227 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 21:05:07,228 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1988c58-60f9-4fbf-bf85-a629a46711c4/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 21:05:07,229 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1988c58-60f9-4fbf-bf85-a629a46711c4/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 21:05:07,230 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1988c58-60f9-4fbf-bf85-a629a46711c4/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-02 21:05:07,299 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-11-02 21:05:07,299 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-02 21:05:07,300 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-02 21:05:07,301 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 21:05:07,389 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-02 21:05:07,390 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 21:05:07,582 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-02 21:05:07,582 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [921579164] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 21:05:07,582 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 21:05:07,582 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 21 [2022-11-02 21:05:07,582 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1981840353] [2022-11-02 21:05:07,582 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 21:05:07,583 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-11-02 21:05:07,583 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 21:05:07,583 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-11-02 21:05:07,584 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=326, Unknown=0, NotChecked=0, Total=420 [2022-11-02 21:05:07,584 INFO L87 Difference]: Start difference. First operand 51 states and 69 transitions. Second operand has 21 states, 21 states have (on average 1.4285714285714286) internal successors, (30), 21 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 21:05:13,793 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 21:05:13,794 INFO L93 Difference]: Finished difference Result 154 states and 221 transitions. [2022-11-02 21:05:13,798 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2022-11-02 21:05:13,798 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.4285714285714286) internal successors, (30), 21 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-11-02 21:05:13,799 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 21:05:13,800 INFO L225 Difference]: With dead ends: 154 [2022-11-02 21:05:13,800 INFO L226 Difference]: Without dead ends: 145 [2022-11-02 21:05:13,804 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1699 ImplicationChecksByTransitivity, 5.7s TimeCoverageRelationStatistics Valid=1418, Invalid=3838, Unknown=0, NotChecked=0, Total=5256 [2022-11-02 21:05:13,805 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 256 mSDsluCounter, 104 mSDsCounter, 0 mSdLazyCounter, 265 mSolverCounterSat, 307 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 256 SdHoareTripleChecker+Valid, 119 SdHoareTripleChecker+Invalid, 572 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 307 IncrementalHoareTripleChecker+Valid, 265 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-02 21:05:13,805 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [256 Valid, 119 Invalid, 572 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [307 Valid, 265 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-11-02 21:05:13,807 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2022-11-02 21:05:13,851 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 71. [2022-11-02 21:05:13,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 70 states have (on average 1.4) internal successors, (98), 70 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 21:05:13,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 98 transitions. [2022-11-02 21:05:13,853 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 98 transitions. Word has length 17 [2022-11-02 21:05:13,853 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 21:05:13,853 INFO L495 AbstractCegarLoop]: Abstraction has 71 states and 98 transitions. [2022-11-02 21:05:13,853 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.4285714285714286) internal successors, (30), 21 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 21:05:13,853 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 98 transitions. [2022-11-02 21:05:13,855 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-11-02 21:05:13,856 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 21:05:13,856 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 21:05:13,881 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1988c58-60f9-4fbf-bf85-a629a46711c4/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-02 21:05:14,062 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1988c58-60f9-4fbf-bf85-a629a46711c4/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 21:05:14,062 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 21:05:14,063 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 21:05:14,063 INFO L85 PathProgramCache]: Analyzing trace with hash -1333529985, now seen corresponding path program 6 times [2022-11-02 21:05:14,063 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 21:05:14,063 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1126281697] [2022-11-02 21:05:14,063 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 21:05:14,063 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 21:05:14,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:05:14,809 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 21:05:14,809 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 21:05:14,810 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1126281697] [2022-11-02 21:05:14,810 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1126281697] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 21:05:14,810 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [879559721] [2022-11-02 21:05:14,810 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-02 21:05:14,810 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 21:05:14,810 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1988c58-60f9-4fbf-bf85-a629a46711c4/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 21:05:14,811 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1988c58-60f9-4fbf-bf85-a629a46711c4/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 21:05:14,822 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1988c58-60f9-4fbf-bf85-a629a46711c4/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-02 21:05:14,890 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-11-02 21:05:14,890 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-02 21:05:14,891 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 40 conjunts are in the unsatisfiable core [2022-11-02 21:05:14,892 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 21:05:15,378 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 21:05:15,378 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 21:05:15,919 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 21:05:15,919 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [879559721] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 21:05:15,919 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 21:05:15,920 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 15, 12] total 34 [2022-11-02 21:05:15,920 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [530872727] [2022-11-02 21:05:15,920 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 21:05:15,920 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-11-02 21:05:15,921 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 21:05:15,921 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-11-02 21:05:15,921 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=144, Invalid=978, Unknown=0, NotChecked=0, Total=1122 [2022-11-02 21:05:15,922 INFO L87 Difference]: Start difference. First operand 71 states and 98 transitions. Second operand has 34 states, 34 states have (on average 1.411764705882353) internal successors, (48), 34 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 21:05:18,262 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 21:05:18,262 INFO L93 Difference]: Finished difference Result 126 states and 159 transitions. [2022-11-02 21:05:18,262 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-11-02 21:05:18,263 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 1.411764705882353) internal successors, (48), 34 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-11-02 21:05:18,263 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 21:05:18,263 INFO L225 Difference]: With dead ends: 126 [2022-11-02 21:05:18,264 INFO L226 Difference]: Without dead ends: 99 [2022-11-02 21:05:18,265 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 765 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=361, Invalid=2501, Unknown=0, NotChecked=0, Total=2862 [2022-11-02 21:05:18,265 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 60 mSDsluCounter, 126 mSDsCounter, 0 mSdLazyCounter, 407 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 137 SdHoareTripleChecker+Invalid, 453 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 407 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-11-02 21:05:18,265 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [60 Valid, 137 Invalid, 453 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 407 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-11-02 21:05:18,266 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2022-11-02 21:05:18,297 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 70. [2022-11-02 21:05:18,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 69 states have (on average 1.3768115942028984) internal successors, (95), 69 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 21:05:18,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 95 transitions. [2022-11-02 21:05:18,299 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 95 transitions. Word has length 18 [2022-11-02 21:05:18,299 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 21:05:18,299 INFO L495 AbstractCegarLoop]: Abstraction has 70 states and 95 transitions. [2022-11-02 21:05:18,299 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 1.411764705882353) internal successors, (48), 34 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 21:05:18,300 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 95 transitions. [2022-11-02 21:05:18,300 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-11-02 21:05:18,300 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 21:05:18,300 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 21:05:18,343 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1988c58-60f9-4fbf-bf85-a629a46711c4/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-11-02 21:05:18,514 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1988c58-60f9-4fbf-bf85-a629a46711c4/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 21:05:18,514 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 21:05:18,514 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 21:05:18,515 INFO L85 PathProgramCache]: Analyzing trace with hash 159423631, now seen corresponding path program 7 times [2022-11-02 21:05:18,515 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 21:05:18,515 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1749394891] [2022-11-02 21:05:18,515 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 21:05:18,515 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 21:05:18,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:05:18,730 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-02 21:05:18,731 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 21:05:18,731 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1749394891] [2022-11-02 21:05:18,731 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1749394891] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 21:05:18,731 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [767615042] [2022-11-02 21:05:18,731 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-02 21:05:18,731 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 21:05:18,731 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1988c58-60f9-4fbf-bf85-a629a46711c4/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 21:05:18,734 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1988c58-60f9-4fbf-bf85-a629a46711c4/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 21:05:18,740 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1988c58-60f9-4fbf-bf85-a629a46711c4/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-02 21:05:18,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:05:18,780 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 26 conjunts are in the unsatisfiable core [2022-11-02 21:05:18,782 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 21:05:18,912 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-02 21:05:18,912 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 21:05:19,093 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-02 21:05:19,093 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [767615042] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 21:05:19,094 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 21:05:19,094 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10] total 23 [2022-11-02 21:05:19,094 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1958888947] [2022-11-02 21:05:19,094 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 21:05:19,094 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-11-02 21:05:19,094 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 21:05:19,095 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-11-02 21:05:19,095 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=413, Unknown=0, NotChecked=0, Total=506 [2022-11-02 21:05:19,095 INFO L87 Difference]: Start difference. First operand 70 states and 95 transitions. Second operand has 23 states, 23 states have (on average 1.4782608695652173) internal successors, (34), 23 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) [2022-11-02 21:05:19,753 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 21:05:19,754 INFO L93 Difference]: Finished difference Result 119 states and 158 transitions. [2022-11-02 21:05:19,754 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-11-02 21:05:19,754 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.4782608695652173) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-11-02 21:05:19,755 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 21:05:19,755 INFO L225 Difference]: With dead ends: 119 [2022-11-02 21:05:19,755 INFO L226 Difference]: Without dead ends: 101 [2022-11-02 21:05:19,756 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 125 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=144, Invalid=668, Unknown=0, NotChecked=0, Total=812 [2022-11-02 21:05:19,757 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 27 mSDsluCounter, 71 mSDsCounter, 0 mSdLazyCounter, 286 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 79 SdHoareTripleChecker+Invalid, 328 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 286 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-02 21:05:19,757 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [27 Valid, 79 Invalid, 328 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 286 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-02 21:05:19,758 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2022-11-02 21:05:19,788 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 77. [2022-11-02 21:05:19,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 76 states have (on average 1.381578947368421) internal successors, (105), 76 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 21:05:19,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 105 transitions. [2022-11-02 21:05:19,789 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 105 transitions. Word has length 20 [2022-11-02 21:05:19,789 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 21:05:19,789 INFO L495 AbstractCegarLoop]: Abstraction has 77 states and 105 transitions. [2022-11-02 21:05:19,789 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.4782608695652173) internal successors, (34), 23 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) [2022-11-02 21:05:19,790 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 105 transitions. [2022-11-02 21:05:19,790 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-11-02 21:05:19,790 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 21:05:19,790 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 21:05:19,822 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1988c58-60f9-4fbf-bf85-a629a46711c4/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-11-02 21:05:20,006 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1988c58-60f9-4fbf-bf85-a629a46711c4/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-11-02 21:05:20,006 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 21:05:20,006 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 21:05:20,007 INFO L85 PathProgramCache]: Analyzing trace with hash -2017092107, now seen corresponding path program 8 times [2022-11-02 21:05:20,007 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 21:05:20,007 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [581949767] [2022-11-02 21:05:20,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 21:05:20,007 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 21:05:20,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:05:20,864 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 21:05:20,864 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 21:05:20,864 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [581949767] [2022-11-02 21:05:20,864 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [581949767] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 21:05:20,864 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [388075291] [2022-11-02 21:05:20,864 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-02 21:05:20,865 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 21:05:20,865 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1988c58-60f9-4fbf-bf85-a629a46711c4/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 21:05:20,870 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1988c58-60f9-4fbf-bf85-a629a46711c4/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 21:05:20,878 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1988c58-60f9-4fbf-bf85-a629a46711c4/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-11-02 21:05:20,964 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-02 21:05:20,965 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-02 21:05:20,966 WARN L261 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 51 conjunts are in the unsatisfiable core [2022-11-02 21:05:20,968 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 21:05:21,567 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 21:05:21,567 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 21:05:22,434 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 21:05:22,435 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [388075291] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 21:05:22,435 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 21:05:22,435 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 18, 14] total 41 [2022-11-02 21:05:22,435 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [390804528] [2022-11-02 21:05:22,435 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 21:05:22,436 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-11-02 21:05:22,436 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 21:05:22,436 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-11-02 21:05:22,437 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=191, Invalid=1449, Unknown=0, NotChecked=0, Total=1640 [2022-11-02 21:05:22,437 INFO L87 Difference]: Start difference. First operand 77 states and 105 transitions. Second operand has 41 states, 41 states have (on average 1.3902439024390243) internal successors, (57), 41 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 21:05:26,640 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 21:05:26,640 INFO L93 Difference]: Finished difference Result 143 states and 178 transitions. [2022-11-02 21:05:26,641 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-11-02 21:05:26,641 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 1.3902439024390243) internal successors, (57), 41 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-11-02 21:05:26,641 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 21:05:26,646 INFO L225 Difference]: With dead ends: 143 [2022-11-02 21:05:26,647 INFO L226 Difference]: Without dead ends: 109 [2022-11-02 21:05:26,649 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1138 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=483, Invalid=3677, Unknown=0, NotChecked=0, Total=4160 [2022-11-02 21:05:26,649 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 83 mSDsluCounter, 149 mSDsCounter, 0 mSdLazyCounter, 674 mSolverCounterSat, 84 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 83 SdHoareTripleChecker+Valid, 161 SdHoareTripleChecker+Invalid, 758 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 84 IncrementalHoareTripleChecker+Valid, 674 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-11-02 21:05:26,650 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [83 Valid, 161 Invalid, 758 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [84 Valid, 674 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-11-02 21:05:26,650 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2022-11-02 21:05:26,687 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 71. [2022-11-02 21:05:26,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 70 states have (on average 1.4) internal successors, (98), 70 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 21:05:26,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 98 transitions. [2022-11-02 21:05:26,688 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 98 transitions. Word has length 21 [2022-11-02 21:05:26,688 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 21:05:26,688 INFO L495 AbstractCegarLoop]: Abstraction has 71 states and 98 transitions. [2022-11-02 21:05:26,689 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 1.3902439024390243) internal successors, (57), 41 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 21:05:26,689 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 98 transitions. [2022-11-02 21:05:26,689 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-11-02 21:05:26,689 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 21:05:26,689 INFO L195 NwaCegarLoop]: trace histogram [7, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 21:05:26,713 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1988c58-60f9-4fbf-bf85-a629a46711c4/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-11-02 21:05:26,897 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1988c58-60f9-4fbf-bf85-a629a46711c4/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-11-02 21:05:26,897 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 21:05:26,898 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 21:05:26,898 INFO L85 PathProgramCache]: Analyzing trace with hash 2027051824, now seen corresponding path program 9 times [2022-11-02 21:05:26,898 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 21:05:26,898 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1109763347] [2022-11-02 21:05:26,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 21:05:26,899 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 21:05:26,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:05:27,158 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-02 21:05:27,158 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 21:05:27,158 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1109763347] [2022-11-02 21:05:27,158 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1109763347] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 21:05:27,158 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [420087548] [2022-11-02 21:05:27,158 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-02 21:05:27,158 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 21:05:27,158 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1988c58-60f9-4fbf-bf85-a629a46711c4/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 21:05:27,160 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1988c58-60f9-4fbf-bf85-a629a46711c4/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 21:05:27,178 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1988c58-60f9-4fbf-bf85-a629a46711c4/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-11-02 21:05:27,215 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-11-02 21:05:27,215 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-02 21:05:27,216 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-02 21:05:27,217 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 21:05:27,346 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2022-11-02 21:05:27,346 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 21:05:27,474 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2022-11-02 21:05:27,475 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [420087548] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 21:05:27,475 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 21:05:27,475 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 8, 8] total 24 [2022-11-02 21:05:27,475 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [33837415] [2022-11-02 21:05:27,475 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 21:05:27,475 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-11-02 21:05:27,476 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 21:05:27,476 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-11-02 21:05:27,476 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=455, Unknown=0, NotChecked=0, Total=552 [2022-11-02 21:05:27,476 INFO L87 Difference]: Start difference. First operand 71 states and 98 transitions. Second operand has 24 states, 24 states have (on average 1.5416666666666667) internal successors, (37), 24 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 21:05:28,572 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 21:05:28,572 INFO L93 Difference]: Finished difference Result 128 states and 170 transitions. [2022-11-02 21:05:28,572 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-11-02 21:05:28,572 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.5416666666666667) internal successors, (37), 24 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-11-02 21:05:28,572 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 21:05:28,573 INFO L225 Difference]: With dead ends: 128 [2022-11-02 21:05:28,573 INFO L226 Difference]: Without dead ends: 115 [2022-11-02 21:05:28,574 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 302 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=428, Invalid=1828, Unknown=0, NotChecked=0, Total=2256 [2022-11-02 21:05:28,575 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 70 mSDsluCounter, 137 mSDsCounter, 0 mSdLazyCounter, 587 mSolverCounterSat, 104 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 70 SdHoareTripleChecker+Valid, 150 SdHoareTripleChecker+Invalid, 691 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 104 IncrementalHoareTripleChecker+Valid, 587 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-02 21:05:28,575 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [70 Valid, 150 Invalid, 691 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [104 Valid, 587 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-02 21:05:28,576 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2022-11-02 21:05:28,606 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 78. [2022-11-02 21:05:28,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 77 states have (on average 1.2987012987012987) internal successors, (100), 77 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 21:05:28,607 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 100 transitions. [2022-11-02 21:05:28,607 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 100 transitions. Word has length 22 [2022-11-02 21:05:28,607 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 21:05:28,607 INFO L495 AbstractCegarLoop]: Abstraction has 78 states and 100 transitions. [2022-11-02 21:05:28,607 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 1.5416666666666667) internal successors, (37), 24 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 21:05:28,608 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 100 transitions. [2022-11-02 21:05:28,608 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-11-02 21:05:28,608 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 21:05:28,608 INFO L195 NwaCegarLoop]: trace histogram [13, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 21:05:28,632 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1988c58-60f9-4fbf-bf85-a629a46711c4/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-11-02 21:05:28,810 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1988c58-60f9-4fbf-bf85-a629a46711c4/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-11-02 21:05:28,810 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 21:05:28,810 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 21:05:28,811 INFO L85 PathProgramCache]: Analyzing trace with hash -1622674000, now seen corresponding path program 3 times [2022-11-02 21:05:28,811 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 21:05:28,811 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1646115825] [2022-11-02 21:05:28,811 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 21:05:28,811 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 21:05:28,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:05:29,131 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 21:05:29,131 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 21:05:29,132 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1646115825] [2022-11-02 21:05:29,132 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1646115825] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 21:05:29,132 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1277489120] [2022-11-02 21:05:29,132 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-02 21:05:29,132 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 21:05:29,132 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1988c58-60f9-4fbf-bf85-a629a46711c4/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 21:05:29,133 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1988c58-60f9-4fbf-bf85-a629a46711c4/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 21:05:29,154 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1988c58-60f9-4fbf-bf85-a629a46711c4/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-11-02 21:05:29,322 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2022-11-02 21:05:29,322 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-02 21:05:29,324 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 31 conjunts are in the unsatisfiable core [2022-11-02 21:05:29,325 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 21:05:29,407 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 21:05:29,407 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 21:05:29,920 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 21:05:29,920 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1277489120] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 21:05:29,921 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 21:05:29,921 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 33 [2022-11-02 21:05:29,921 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1082423189] [2022-11-02 21:05:29,921 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 21:05:29,921 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-11-02 21:05:29,922 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 21:05:29,922 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-11-02 21:05:29,922 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=261, Invalid=795, Unknown=0, NotChecked=0, Total=1056 [2022-11-02 21:05:29,923 INFO L87 Difference]: Start difference. First operand 78 states and 100 transitions. Second operand has 33 states, 33 states have (on average 1.2424242424242424) internal successors, (41), 33 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 21:05:57,229 WARN L234 SmtUtils]: Spent 7.39s on a formula simplification that was a NOOP. DAG size: 61 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-02 21:06:54,420 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 21:06:54,420 INFO L93 Difference]: Finished difference Result 396 states and 538 transitions. [2022-11-02 21:06:54,420 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2022-11-02 21:06:54,421 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.2424242424242424) internal successors, (41), 33 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-11-02 21:06:54,421 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 21:06:54,422 INFO L225 Difference]: With dead ends: 396 [2022-11-02 21:06:54,423 INFO L226 Difference]: Without dead ends: 369 [2022-11-02 21:06:54,424 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1630 ImplicationChecksByTransitivity, 82.3s TimeCoverageRelationStatistics Valid=2044, Invalid=4597, Unknown=1, NotChecked=0, Total=6642 [2022-11-02 21:06:54,425 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 859 mSDsluCounter, 304 mSDsCounter, 0 mSdLazyCounter, 743 mSolverCounterSat, 633 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 859 SdHoareTripleChecker+Valid, 327 SdHoareTripleChecker+Invalid, 1376 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 633 IncrementalHoareTripleChecker+Valid, 743 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2022-11-02 21:06:54,425 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [859 Valid, 327 Invalid, 1376 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [633 Valid, 743 Invalid, 0 Unknown, 0 Unchecked, 2.4s Time] [2022-11-02 21:06:54,426 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 369 states. [2022-11-02 21:06:54,477 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 369 to 117. [2022-11-02 21:06:54,477 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 117 states, 116 states have (on average 1.3448275862068966) internal successors, (156), 116 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 21:06:54,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 156 transitions. [2022-11-02 21:06:54,478 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 156 transitions. Word has length 22 [2022-11-02 21:06:54,478 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 21:06:54,478 INFO L495 AbstractCegarLoop]: Abstraction has 117 states and 156 transitions. [2022-11-02 21:06:54,478 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 1.2424242424242424) internal successors, (41), 33 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 21:06:54,478 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 156 transitions. [2022-11-02 21:06:54,479 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-11-02 21:06:54,479 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 21:06:54,479 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 21:06:54,501 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1988c58-60f9-4fbf-bf85-a629a46711c4/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-11-02 21:06:54,682 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1988c58-60f9-4fbf-bf85-a629a46711c4/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-11-02 21:06:54,682 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 21:06:54,683 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 21:06:54,683 INFO L85 PathProgramCache]: Analyzing trace with hash -1589406077, now seen corresponding path program 10 times [2022-11-02 21:06:54,683 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 21:06:54,683 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [361757465] [2022-11-02 21:06:54,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 21:06:54,683 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 21:06:54,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:06:54,904 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-11-02 21:06:54,904 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 21:06:54,904 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [361757465] [2022-11-02 21:06:54,904 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [361757465] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 21:06:54,904 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [448990879] [2022-11-02 21:06:54,905 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-02 21:06:54,905 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 21:06:54,905 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1988c58-60f9-4fbf-bf85-a629a46711c4/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 21:06:54,906 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1988c58-60f9-4fbf-bf85-a629a46711c4/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 21:06:54,907 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1988c58-60f9-4fbf-bf85-a629a46711c4/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-11-02 21:06:54,951 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-02 21:06:54,951 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-02 21:06:54,953 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 32 conjunts are in the unsatisfiable core [2022-11-02 21:06:54,954 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 21:06:55,109 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-11-02 21:06:55,109 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 21:06:55,389 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-11-02 21:06:55,389 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [448990879] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 21:06:55,389 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 21:06:55,389 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 12] total 28 [2022-11-02 21:06:55,389 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1626883027] [2022-11-02 21:06:55,389 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 21:06:55,390 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-11-02 21:06:55,390 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 21:06:55,390 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-11-02 21:06:55,391 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=631, Unknown=0, NotChecked=0, Total=756 [2022-11-02 21:06:55,391 INFO L87 Difference]: Start difference. First operand 117 states and 156 transitions. Second operand has 28 states, 28 states have (on average 1.3928571428571428) internal successors, (39), 28 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 21:06:56,625 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 21:06:56,625 INFO L93 Difference]: Finished difference Result 209 states and 262 transitions. [2022-11-02 21:06:56,625 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-11-02 21:06:56,626 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.3928571428571428) internal successors, (39), 28 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-11-02 21:06:56,626 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 21:06:56,626 INFO L225 Difference]: With dead ends: 209 [2022-11-02 21:06:56,627 INFO L226 Difference]: Without dead ends: 160 [2022-11-02 21:06:56,627 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 191 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=194, Invalid=996, Unknown=0, NotChecked=0, Total=1190 [2022-11-02 21:06:56,628 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 36 mSDsluCounter, 104 mSDsCounter, 0 mSdLazyCounter, 458 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 112 SdHoareTripleChecker+Invalid, 504 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 458 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-02 21:06:56,628 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [36 Valid, 112 Invalid, 504 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 458 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-02 21:06:56,629 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2022-11-02 21:06:56,681 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 131. [2022-11-02 21:06:56,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131 states, 130 states have (on average 1.323076923076923) internal successors, (172), 130 states have internal predecessors, (172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 21:06:56,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 172 transitions. [2022-11-02 21:06:56,682 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 172 transitions. Word has length 23 [2022-11-02 21:06:56,682 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 21:06:56,682 INFO L495 AbstractCegarLoop]: Abstraction has 131 states and 172 transitions. [2022-11-02 21:06:56,683 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 1.3928571428571428) internal successors, (39), 28 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 21:06:56,683 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 172 transitions. [2022-11-02 21:06:56,683 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-11-02 21:06:56,683 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 21:06:56,683 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 21:06:56,704 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1988c58-60f9-4fbf-bf85-a629a46711c4/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-11-02 21:06:56,885 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1988c58-60f9-4fbf-bf85-a629a46711c4/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 21:06:56,886 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 21:06:56,886 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 21:06:56,886 INFO L85 PathProgramCache]: Analyzing trace with hash 1230457407, now seen corresponding path program 11 times [2022-11-02 21:06:56,886 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 21:06:56,886 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1795276697] [2022-11-02 21:06:56,886 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 21:06:56,887 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 21:06:56,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:06:57,765 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 21:06:57,766 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 21:06:57,766 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1795276697] [2022-11-02 21:06:57,766 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1795276697] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 21:06:57,766 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1174204428] [2022-11-02 21:06:57,766 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-02 21:06:57,766 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 21:06:57,766 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1988c58-60f9-4fbf-bf85-a629a46711c4/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 21:06:57,767 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1988c58-60f9-4fbf-bf85-a629a46711c4/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 21:06:57,768 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1988c58-60f9-4fbf-bf85-a629a46711c4/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-11-02 21:06:57,978 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-11-02 21:06:57,979 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-02 21:06:57,980 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 55 conjunts are in the unsatisfiable core [2022-11-02 21:06:57,982 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 21:06:59,068 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 21:06:59,069 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 21:07:00,194 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 21:07:00,194 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1174204428] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 21:07:00,194 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 21:07:00,195 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 16] total 43 [2022-11-02 21:07:00,195 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1524869957] [2022-11-02 21:07:00,195 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 21:07:00,195 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-11-02 21:07:00,195 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 21:07:00,196 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-11-02 21:07:00,197 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=194, Invalid=1612, Unknown=0, NotChecked=0, Total=1806 [2022-11-02 21:07:00,197 INFO L87 Difference]: Start difference. First operand 131 states and 172 transitions. Second operand has 43 states, 43 states have (on average 1.5116279069767442) internal successors, (65), 43 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 21:07:10,823 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 21:07:10,823 INFO L93 Difference]: Finished difference Result 207 states and 252 transitions. [2022-11-02 21:07:10,824 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2022-11-02 21:07:10,824 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 1.5116279069767442) internal successors, (65), 43 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-11-02 21:07:10,824 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 21:07:10,825 INFO L225 Difference]: With dead ends: 207 [2022-11-02 21:07:10,826 INFO L226 Difference]: Without dead ends: 177 [2022-11-02 21:07:10,827 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1059 ImplicationChecksByTransitivity, 10.8s TimeCoverageRelationStatistics Valid=504, Invalid=3918, Unknown=0, NotChecked=0, Total=4422 [2022-11-02 21:07:10,827 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 84 mSDsluCounter, 112 mSDsCounter, 0 mSdLazyCounter, 582 mSolverCounterSat, 80 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 84 SdHoareTripleChecker+Valid, 120 SdHoareTripleChecker+Invalid, 662 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 80 IncrementalHoareTripleChecker+Valid, 582 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2022-11-02 21:07:10,828 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [84 Valid, 120 Invalid, 662 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [80 Valid, 582 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2022-11-02 21:07:10,828 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2022-11-02 21:07:10,882 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 119. [2022-11-02 21:07:10,882 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 119 states, 118 states have (on average 1.3305084745762712) internal successors, (157), 118 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 21:07:10,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 157 transitions. [2022-11-02 21:07:10,883 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 157 transitions. Word has length 24 [2022-11-02 21:07:10,883 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 21:07:10,883 INFO L495 AbstractCegarLoop]: Abstraction has 119 states and 157 transitions. [2022-11-02 21:07:10,883 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 1.5116279069767442) internal successors, (65), 43 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 21:07:10,884 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 157 transitions. [2022-11-02 21:07:10,884 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-11-02 21:07:10,884 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 21:07:10,884 INFO L195 NwaCegarLoop]: trace histogram [14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 21:07:10,889 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1988c58-60f9-4fbf-bf85-a629a46711c4/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-11-02 21:07:11,089 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1988c58-60f9-4fbf-bf85-a629a46711c4/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-11-02 21:07:11,089 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 21:07:11,090 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 21:07:11,090 INFO L85 PathProgramCache]: Analyzing trace with hash 1431729572, now seen corresponding path program 12 times [2022-11-02 21:07:11,090 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 21:07:11,090 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [421199523] [2022-11-02 21:07:11,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 21:07:11,090 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 21:07:11,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:07:11,453 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 0 proven. 106 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-02 21:07:11,453 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 21:07:11,453 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [421199523] [2022-11-02 21:07:11,453 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [421199523] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 21:07:11,453 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1007451286] [2022-11-02 21:07:11,453 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-02 21:07:11,454 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 21:07:11,454 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1988c58-60f9-4fbf-bf85-a629a46711c4/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 21:07:11,455 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1988c58-60f9-4fbf-bf85-a629a46711c4/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 21:07:11,481 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1988c58-60f9-4fbf-bf85-a629a46711c4/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-11-02 21:07:11,754 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2022-11-02 21:07:11,755 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-02 21:07:11,756 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 33 conjunts are in the unsatisfiable core [2022-11-02 21:07:11,757 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 21:07:11,844 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 0 proven. 106 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-02 21:07:11,844 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 21:07:12,387 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 0 proven. 106 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-02 21:07:12,388 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1007451286] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 21:07:12,388 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 21:07:12,388 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 17, 17] total 34 [2022-11-02 21:07:12,388 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1335200909] [2022-11-02 21:07:12,388 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 21:07:12,389 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-11-02 21:07:12,389 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 21:07:12,389 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-11-02 21:07:12,390 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=289, Invalid=833, Unknown=0, NotChecked=0, Total=1122 [2022-11-02 21:07:12,390 INFO L87 Difference]: Start difference. First operand 119 states and 157 transitions. Second operand has 34 states, 34 states have (on average 1.5) internal successors, (51), 34 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 21:07:26,999 WARN L234 SmtUtils]: Spent 9.09s on a formula simplification that was a NOOP. DAG size: 62 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-02 21:07:38,034 WARN L234 SmtUtils]: Spent 6.04s on a formula simplification that was a NOOP. DAG size: 58 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-02 21:07:50,040 WARN L234 SmtUtils]: Spent 5.71s on a formula simplification that was a NOOP. DAG size: 54 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-02 21:08:08,148 WARN L234 SmtUtils]: Spent 6.08s on a formula simplification that was a NOOP. DAG size: 58 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-02 21:08:25,877 WARN L234 SmtUtils]: Spent 6.18s on a formula simplification that was a NOOP. DAG size: 54 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-02 21:09:10,215 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 21:09:10,215 INFO L93 Difference]: Finished difference Result 476 states and 621 transitions. [2022-11-02 21:09:10,216 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2022-11-02 21:09:10,216 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 1.5) internal successors, (51), 34 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-11-02 21:09:10,216 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 21:09:10,219 INFO L225 Difference]: With dead ends: 476 [2022-11-02 21:09:10,219 INFO L226 Difference]: Without dead ends: 429 [2022-11-02 21:09:10,220 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 35 SyntacticMatches, 1 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1043 ImplicationChecksByTransitivity, 114.8s TimeCoverageRelationStatistics Valid=1928, Invalid=3924, Unknown=0, NotChecked=0, Total=5852 [2022-11-02 21:09:10,221 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 968 mSDsluCounter, 478 mSDsCounter, 0 mSdLazyCounter, 765 mSolverCounterSat, 579 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 968 SdHoareTripleChecker+Valid, 508 SdHoareTripleChecker+Invalid, 1344 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 579 IncrementalHoareTripleChecker+Valid, 765 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.0s IncrementalHoareTripleChecker+Time [2022-11-02 21:09:10,221 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [968 Valid, 508 Invalid, 1344 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [579 Valid, 765 Invalid, 0 Unknown, 0 Unchecked, 3.0s Time] [2022-11-02 21:09:10,222 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 429 states. [2022-11-02 21:09:10,311 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 429 to 134. [2022-11-02 21:09:10,311 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 134 states, 133 states have (on average 1.330827067669173) internal successors, (177), 133 states have internal predecessors, (177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 21:09:10,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 177 transitions. [2022-11-02 21:09:10,312 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 177 transitions. Word has length 25 [2022-11-02 21:09:10,312 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 21:09:10,312 INFO L495 AbstractCegarLoop]: Abstraction has 134 states and 177 transitions. [2022-11-02 21:09:10,312 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 1.5) internal successors, (51), 34 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 21:09:10,312 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 177 transitions. [2022-11-02 21:09:10,313 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-11-02 21:09:10,313 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 21:09:10,313 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 21:09:10,318 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1988c58-60f9-4fbf-bf85-a629a46711c4/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-11-02 21:09:10,518 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1988c58-60f9-4fbf-bf85-a629a46711c4/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-11-02 21:09:10,518 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 21:09:10,518 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 21:09:10,518 INFO L85 PathProgramCache]: Analyzing trace with hash -40778609, now seen corresponding path program 13 times [2022-11-02 21:09:10,519 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 21:09:10,519 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1443175708] [2022-11-02 21:09:10,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 21:09:10,519 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 21:09:10,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:09:10,793 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-11-02 21:09:10,794 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 21:09:10,794 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1443175708] [2022-11-02 21:09:10,794 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1443175708] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 21:09:10,794 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [581657330] [2022-11-02 21:09:10,794 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-02 21:09:10,794 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 21:09:10,794 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1988c58-60f9-4fbf-bf85-a629a46711c4/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 21:09:10,795 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1988c58-60f9-4fbf-bf85-a629a46711c4/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 21:09:10,802 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1988c58-60f9-4fbf-bf85-a629a46711c4/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-11-02 21:09:10,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:09:10,843 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 38 conjunts are in the unsatisfiable core [2022-11-02 21:09:10,845 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 21:09:11,029 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-11-02 21:09:11,029 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 21:09:11,393 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 6 proven. 30 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-11-02 21:09:11,393 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [581657330] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 21:09:11,393 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 21:09:11,393 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 14] total 33 [2022-11-02 21:09:11,394 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1496831506] [2022-11-02 21:09:11,394 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 21:09:11,394 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-11-02 21:09:11,394 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 21:09:11,395 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-11-02 21:09:11,395 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=161, Invalid=895, Unknown=0, NotChecked=0, Total=1056 [2022-11-02 21:09:11,395 INFO L87 Difference]: Start difference. First operand 134 states and 177 transitions. Second operand has 33 states, 33 states have (on average 1.3333333333333333) internal successors, (44), 33 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 21:09:13,534 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 21:09:13,534 INFO L93 Difference]: Finished difference Result 244 states and 304 transitions. [2022-11-02 21:09:13,535 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-11-02 21:09:13,535 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.3333333333333333) internal successors, (44), 33 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-11-02 21:09:13,535 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 21:09:13,536 INFO L225 Difference]: With dead ends: 244 [2022-11-02 21:09:13,536 INFO L226 Difference]: Without dead ends: 182 [2022-11-02 21:09:13,537 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 34 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 271 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=251, Invalid=1389, Unknown=0, NotChecked=0, Total=1640 [2022-11-02 21:09:13,537 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 37 mSDsluCounter, 114 mSDsCounter, 0 mSdLazyCounter, 592 mSolverCounterSat, 58 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 122 SdHoareTripleChecker+Invalid, 650 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 58 IncrementalHoareTripleChecker+Valid, 592 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-02 21:09:13,538 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [37 Valid, 122 Invalid, 650 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [58 Valid, 592 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-11-02 21:09:13,539 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 182 states. [2022-11-02 21:09:13,616 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 182 to 150. [2022-11-02 21:09:13,616 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 150 states, 149 states have (on average 1.308724832214765) internal successors, (195), 149 states have internal predecessors, (195), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 21:09:13,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 195 transitions. [2022-11-02 21:09:13,617 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 195 transitions. Word has length 26 [2022-11-02 21:09:13,617 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 21:09:13,617 INFO L495 AbstractCegarLoop]: Abstraction has 150 states and 195 transitions. [2022-11-02 21:09:13,617 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 1.3333333333333333) internal successors, (44), 33 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 21:09:13,617 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 195 transitions. [2022-11-02 21:09:13,617 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-11-02 21:09:13,617 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 21:09:13,617 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 21:09:13,642 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1988c58-60f9-4fbf-bf85-a629a46711c4/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-11-02 21:09:13,818 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1988c58-60f9-4fbf-bf85-a629a46711c4/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-11-02 21:09:13,818 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 21:09:13,818 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 21:09:13,818 INFO L85 PathProgramCache]: Analyzing trace with hash 881225141, now seen corresponding path program 14 times [2022-11-02 21:09:13,818 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 21:09:13,819 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1187382151] [2022-11-02 21:09:13,819 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 21:09:13,819 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 21:09:13,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:09:15,000 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 63 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 21:09:15,000 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 21:09:15,000 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1187382151] [2022-11-02 21:09:15,000 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1187382151] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 21:09:15,000 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [882689988] [2022-11-02 21:09:15,000 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-02 21:09:15,000 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 21:09:15,000 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1988c58-60f9-4fbf-bf85-a629a46711c4/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 21:09:15,001 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1988c58-60f9-4fbf-bf85-a629a46711c4/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 21:09:15,003 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1988c58-60f9-4fbf-bf85-a629a46711c4/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-11-02 21:09:15,262 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-02 21:09:15,263 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-02 21:09:15,265 WARN L261 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 71 conjunts are in the unsatisfiable core [2022-11-02 21:09:15,266 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 21:09:16,213 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 63 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 21:09:16,213 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 21:09:17,478 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 63 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 21:09:17,478 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [882689988] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 21:09:17,478 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 21:09:17,479 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 24, 18] total 55 [2022-11-02 21:09:17,479 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1049302900] [2022-11-02 21:09:17,479 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 21:09:17,480 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 55 states [2022-11-02 21:09:17,480 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 21:09:17,480 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2022-11-02 21:09:17,481 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=303, Invalid=2667, Unknown=0, NotChecked=0, Total=2970 [2022-11-02 21:09:17,481 INFO L87 Difference]: Start difference. First operand 150 states and 195 transitions. Second operand has 55 states, 55 states have (on average 1.3636363636363635) internal successors, (75), 55 states have internal predecessors, (75), 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)