./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/reducercommutativity/sep60-2.i --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_f3e69c30-59bd-4153-96f2-cade2e830f3f/bin/uautomizer-Dbtcem3rbc/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3e69c30-59bd-4153-96f2-cade2e830f3f/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_f3e69c30-59bd-4153-96f2-cade2e830f3f/bin/uautomizer-Dbtcem3rbc/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3e69c30-59bd-4153-96f2-cade2e830f3f/bin/uautomizer-Dbtcem3rbc/config/AutomizerReach.xml -i ../../sv-benchmarks/c/reducercommutativity/sep60-2.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3e69c30-59bd-4153-96f2-cade2e830f3f/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_f3e69c30-59bd-4153-96f2-cade2e830f3f/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 b065e6ebd473a7ead2bba44643aa633e2e19aa846c3de415abaad6e73d224b64 --- 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 20:11:53,630 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-02 20:11:53,632 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-02 20:11:53,660 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-02 20:11:53,660 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-02 20:11:53,662 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-02 20:11:53,663 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-02 20:11:53,665 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-02 20:11:53,667 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-02 20:11:53,668 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-02 20:11:53,669 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-02 20:11:53,670 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-02 20:11:53,671 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-02 20:11:53,672 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-02 20:11:53,673 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-02 20:11:53,675 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-02 20:11:53,676 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-02 20:11:53,677 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-02 20:11:53,679 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-02 20:11:53,681 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-02 20:11:53,682 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-02 20:11:53,684 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-02 20:11:53,685 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-02 20:11:53,686 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-02 20:11:53,690 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-02 20:11:53,690 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-02 20:11:53,691 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-02 20:11:53,692 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-02 20:11:53,692 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-02 20:11:53,693 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-02 20:11:53,694 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-02 20:11:53,695 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-02 20:11:53,695 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-02 20:11:53,696 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-02 20:11:53,698 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-02 20:11:53,698 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-02 20:11:53,699 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-02 20:11:53,699 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-02 20:11:53,700 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-02 20:11:53,701 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-02 20:11:53,702 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-02 20:11:53,703 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3e69c30-59bd-4153-96f2-cade2e830f3f/bin/uautomizer-Dbtcem3rbc/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-11-02 20:11:53,725 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-02 20:11:53,726 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-02 20:11:53,726 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-02 20:11:53,726 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-02 20:11:53,727 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-02 20:11:53,727 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-02 20:11:53,728 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-02 20:11:53,728 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-02 20:11:53,728 INFO L138 SettingsManager]: * Use SBE=true [2022-11-02 20:11:53,729 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-02 20:11:53,729 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-02 20:11:53,729 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-02 20:11:53,729 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-02 20:11:53,729 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-02 20:11:53,730 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-02 20:11:53,730 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-02 20:11:53,730 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-02 20:11:53,730 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-02 20:11:53,731 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-02 20:11:53,731 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-02 20:11:53,731 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-02 20:11:53,731 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-02 20:11:53,731 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-02 20:11:53,732 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-02 20:11:53,732 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-02 20:11:53,732 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-02 20:11:53,732 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-02 20:11:53,733 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-02 20:11:53,733 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-02 20:11:53,733 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-02 20:11:53,733 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-11-02 20:11:53,733 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-11-02 20:11:53,734 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-02 20:11:53,734 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_f3e69c30-59bd-4153-96f2-cade2e830f3f/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3e69c30-59bd-4153-96f2-cade2e830f3f/bin/uautomizer-Dbtcem3rbc Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> b065e6ebd473a7ead2bba44643aa633e2e19aa846c3de415abaad6e73d224b64 [2022-11-02 20:11:53,989 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-02 20:11:54,013 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-02 20:11:54,015 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-02 20:11:54,017 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-02 20:11:54,019 INFO L275 PluginConnector]: CDTParser initialized [2022-11-02 20:11:54,020 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3e69c30-59bd-4153-96f2-cade2e830f3f/bin/uautomizer-Dbtcem3rbc/../../sv-benchmarks/c/reducercommutativity/sep60-2.i [2022-11-02 20:11:54,091 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3e69c30-59bd-4153-96f2-cade2e830f3f/bin/uautomizer-Dbtcem3rbc/data/c220cc686/57d31fe3d41c4e5faf706be0f88cac9d/FLAG37c00c630 [2022-11-02 20:11:54,539 INFO L306 CDTParser]: Found 1 translation units. [2022-11-02 20:11:54,539 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3e69c30-59bd-4153-96f2-cade2e830f3f/sv-benchmarks/c/reducercommutativity/sep60-2.i [2022-11-02 20:11:54,550 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3e69c30-59bd-4153-96f2-cade2e830f3f/bin/uautomizer-Dbtcem3rbc/data/c220cc686/57d31fe3d41c4e5faf706be0f88cac9d/FLAG37c00c630 [2022-11-02 20:11:54,883 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3e69c30-59bd-4153-96f2-cade2e830f3f/bin/uautomizer-Dbtcem3rbc/data/c220cc686/57d31fe3d41c4e5faf706be0f88cac9d [2022-11-02 20:11:54,885 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-02 20:11:54,886 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-02 20:11:54,888 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-02 20:11:54,888 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-02 20:11:54,895 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-02 20:11:54,895 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.11 08:11:54" (1/1) ... [2022-11-02 20:11:54,897 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4aa598a1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:11:54, skipping insertion in model container [2022-11-02 20:11:54,897 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.11 08:11:54" (1/1) ... [2022-11-02 20:11:54,904 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-02 20:11:54,919 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-02 20:11:55,157 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_f3e69c30-59bd-4153-96f2-cade2e830f3f/sv-benchmarks/c/reducercommutativity/sep60-2.i[1293,1306] [2022-11-02 20:11:55,160 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-02 20:11:55,175 INFO L203 MainTranslator]: Completed pre-run [2022-11-02 20:11:55,216 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_f3e69c30-59bd-4153-96f2-cade2e830f3f/sv-benchmarks/c/reducercommutativity/sep60-2.i[1293,1306] [2022-11-02 20:11:55,217 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-02 20:11:55,233 INFO L208 MainTranslator]: Completed translation [2022-11-02 20:11:55,234 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:11:55 WrapperNode [2022-11-02 20:11:55,235 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-02 20:11:55,236 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-02 20:11:55,236 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-02 20:11:55,236 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-02 20:11:55,244 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:11:55" (1/1) ... [2022-11-02 20:11:55,261 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:11:55" (1/1) ... [2022-11-02 20:11:55,286 INFO L138 Inliner]: procedures = 16, calls = 22, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 67 [2022-11-02 20:11:55,286 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-02 20:11:55,288 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-02 20:11:55,288 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-02 20:11:55,288 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-02 20:11:55,297 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:11:55" (1/1) ... [2022-11-02 20:11:55,297 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:11:55" (1/1) ... [2022-11-02 20:11:55,302 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:11:55" (1/1) ... [2022-11-02 20:11:55,302 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:11:55" (1/1) ... [2022-11-02 20:11:55,319 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:11:55" (1/1) ... [2022-11-02 20:11:55,322 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:11:55" (1/1) ... [2022-11-02 20:11:55,323 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:11:55" (1/1) ... [2022-11-02 20:11:55,324 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:11:55" (1/1) ... [2022-11-02 20:11:55,326 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-02 20:11:55,327 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-02 20:11:55,327 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-02 20:11:55,327 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-02 20:11:55,330 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:11:55" (1/1) ... [2022-11-02 20:11:55,336 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-02 20:11:55,353 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3e69c30-59bd-4153-96f2-cade2e830f3f/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:11:55,366 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3e69c30-59bd-4153-96f2-cade2e830f3f/bin/uautomizer-Dbtcem3rbc/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-02 20:11:55,396 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3e69c30-59bd-4153-96f2-cade2e830f3f/bin/uautomizer-Dbtcem3rbc/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-02 20:11:55,417 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-02 20:11:55,417 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-02 20:11:55,418 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-02 20:11:55,418 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-02 20:11:55,418 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-02 20:11:55,419 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-02 20:11:55,419 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-02 20:11:55,419 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-02 20:11:55,419 INFO L130 BoogieDeclarations]: Found specification of procedure sep [2022-11-02 20:11:55,419 INFO L138 BoogieDeclarations]: Found implementation of procedure sep [2022-11-02 20:11:55,490 INFO L235 CfgBuilder]: Building ICFG [2022-11-02 20:11:55,493 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-02 20:11:55,657 INFO L276 CfgBuilder]: Performing block encoding [2022-11-02 20:11:55,663 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-02 20:11:55,664 INFO L300 CfgBuilder]: Removed 3 assume(true) statements. [2022-11-02 20:11:55,666 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.11 08:11:55 BoogieIcfgContainer [2022-11-02 20:11:55,666 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-02 20:11:55,668 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-02 20:11:55,669 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-02 20:11:55,673 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-02 20:11:55,673 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.11 08:11:54" (1/3) ... [2022-11-02 20:11:55,674 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6c7cc91b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.11 08:11:55, skipping insertion in model container [2022-11-02 20:11:55,674 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:11:55" (2/3) ... [2022-11-02 20:11:55,674 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6c7cc91b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.11 08:11:55, skipping insertion in model container [2022-11-02 20:11:55,675 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.11 08:11:55" (3/3) ... [2022-11-02 20:11:55,676 INFO L112 eAbstractionObserver]: Analyzing ICFG sep60-2.i [2022-11-02 20:11:55,696 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-02 20:11:55,697 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-02 20:11:55,763 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-02 20:11:55,770 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;@48e1cfab, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-02 20:11:55,770 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-02 20:11:55,774 INFO L276 IsEmpty]: Start isEmpty. Operand has 27 states, 21 states have (on average 1.4285714285714286) internal successors, (30), 22 states have internal predecessors, (30), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-02 20:11:55,783 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-11-02 20:11:55,784 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:11:55,784 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:11:55,785 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:11:55,790 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:11:55,791 INFO L85 PathProgramCache]: Analyzing trace with hash -1312709850, now seen corresponding path program 1 times [2022-11-02 20:11:55,801 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:11:55,802 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [830200034] [2022-11-02 20:11:55,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:11:55,803 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:11:55,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:11:56,122 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-11-02 20:11:56,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:11:56,133 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-11-02 20:11:56,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:11:56,142 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-11-02 20:11:56,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:11:56,152 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-11-02 20:11:56,152 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:11:56,153 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [830200034] [2022-11-02 20:11:56,154 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [830200034] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:11:56,154 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:11:56,154 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-02 20:11:56,156 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [639104172] [2022-11-02 20:11:56,157 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:11:56,161 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-02 20:11:56,161 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:11:56,220 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-02 20:11:56,221 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-02 20:11:56,223 INFO L87 Difference]: Start difference. First operand has 27 states, 21 states have (on average 1.4285714285714286) internal successors, (30), 22 states have internal predecessors, (30), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-11-02 20:11:56,286 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:11:56,287 INFO L93 Difference]: Finished difference Result 52 states and 73 transitions. [2022-11-02 20:11:56,288 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-02 20:11:56,290 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 28 [2022-11-02 20:11:56,290 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:11:56,297 INFO L225 Difference]: With dead ends: 52 [2022-11-02 20:11:56,297 INFO L226 Difference]: Without dead ends: 25 [2022-11-02 20:11:56,301 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-02 20:11:56,305 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 1 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 58 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-02 20:11:56,306 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 58 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-02 20:11:56,334 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2022-11-02 20:11:56,352 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 24. [2022-11-02 20:11:56,353 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 19 states have (on average 1.2105263157894737) internal successors, (23), 19 states have internal predecessors, (23), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-02 20:11:56,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 29 transitions. [2022-11-02 20:11:56,356 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 29 transitions. Word has length 28 [2022-11-02 20:11:56,356 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:11:56,356 INFO L495 AbstractCegarLoop]: Abstraction has 24 states and 29 transitions. [2022-11-02 20:11:56,357 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-11-02 20:11:56,357 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 29 transitions. [2022-11-02 20:11:56,358 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-11-02 20:11:56,359 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:11:56,359 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:11:56,359 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-02 20:11:56,360 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:11:56,361 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:11:56,361 INFO L85 PathProgramCache]: Analyzing trace with hash 1845794557, now seen corresponding path program 1 times [2022-11-02 20:11:56,361 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:11:56,361 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [9712447] [2022-11-02 20:11:56,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:11:56,362 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:11:56,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:11:56,501 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2022-11-02 20:11:56,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:11:56,512 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-11-02 20:11:56,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:11:56,523 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-11-02 20:11:56,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:11:56,535 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-11-02 20:11:56,535 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:11:56,535 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [9712447] [2022-11-02 20:11:56,536 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [9712447] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:11:56,536 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [299220400] [2022-11-02 20:11:56,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:11:56,537 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:11:56,537 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3e69c30-59bd-4153-96f2-cade2e830f3f/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:11:56,539 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3e69c30-59bd-4153-96f2-cade2e830f3f/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:11:56,550 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3e69c30-59bd-4153-96f2-cade2e830f3f/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-02 20:11:56,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:11:56,663 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-02 20:11:56,671 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:11:56,707 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-02 20:11:56,707 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-02 20:11:56,707 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [299220400] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:11:56,708 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-02 20:11:56,708 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2022-11-02 20:11:56,709 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2119625653] [2022-11-02 20:11:56,709 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:11:56,710 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-02 20:11:56,710 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:11:56,711 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-02 20:11:56,711 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-02 20:11:56,711 INFO L87 Difference]: Start difference. First operand 24 states and 29 transitions. Second operand has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2022-11-02 20:11:56,724 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:11:56,724 INFO L93 Difference]: Finished difference Result 45 states and 58 transitions. [2022-11-02 20:11:56,725 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-02 20:11:56,725 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) Word has length 30 [2022-11-02 20:11:56,725 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:11:56,726 INFO L225 Difference]: With dead ends: 45 [2022-11-02 20:11:56,726 INFO L226 Difference]: Without dead ends: 27 [2022-11-02 20:11:56,727 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-02 20:11:56,728 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 3 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-02 20:11:56,729 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 50 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-02 20:11:56,730 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2022-11-02 20:11:56,734 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 25. [2022-11-02 20:11:56,738 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 20 states have (on average 1.2) internal successors, (24), 20 states have internal predecessors, (24), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-02 20:11:56,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 30 transitions. [2022-11-02 20:11:56,739 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 30 transitions. Word has length 30 [2022-11-02 20:11:56,740 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:11:56,740 INFO L495 AbstractCegarLoop]: Abstraction has 25 states and 30 transitions. [2022-11-02 20:11:56,740 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2022-11-02 20:11:56,740 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 30 transitions. [2022-11-02 20:11:56,741 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-11-02 20:11:56,741 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:11:56,741 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:11:56,781 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3e69c30-59bd-4153-96f2-cade2e830f3f/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-11-02 20:11:56,965 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3e69c30-59bd-4153-96f2-cade2e830f3f/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:11:56,965 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:11:56,966 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:11:56,966 INFO L85 PathProgramCache]: Analyzing trace with hash -701057785, now seen corresponding path program 1 times [2022-11-02 20:11:56,966 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:11:56,967 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [156261686] [2022-11-02 20:11:56,967 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:11:56,967 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:11:56,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:11:57,087 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2022-11-02 20:11:57,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:11:57,142 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-11-02 20:11:57,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:11:57,153 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-11-02 20:11:57,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:11:57,178 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-11-02 20:11:57,178 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:11:57,179 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [156261686] [2022-11-02 20:11:57,179 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [156261686] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:11:57,179 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [877206269] [2022-11-02 20:11:57,179 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:11:57,180 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:11:57,180 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3e69c30-59bd-4153-96f2-cade2e830f3f/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:11:57,193 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3e69c30-59bd-4153-96f2-cade2e830f3f/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:11:57,215 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3e69c30-59bd-4153-96f2-cade2e830f3f/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-02 20:11:57,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:11:57,335 INFO L263 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-02 20:11:57,337 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:11:57,364 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-11-02 20:11:57,364 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-02 20:11:57,364 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [877206269] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:11:57,364 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-02 20:11:57,365 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2022-11-02 20:11:57,365 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [513617797] [2022-11-02 20:11:57,365 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:11:57,369 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-02 20:11:57,369 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:11:57,370 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-02 20:11:57,370 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-11-02 20:11:57,370 INFO L87 Difference]: Start difference. First operand 25 states and 30 transitions. Second operand has 3 states, 3 states have (on average 8.666666666666666) internal successors, (26), 3 states have internal predecessors, (26), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-11-02 20:11:57,394 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:11:57,394 INFO L93 Difference]: Finished difference Result 41 states and 48 transitions. [2022-11-02 20:11:57,399 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-02 20:11:57,399 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 8.666666666666666) internal successors, (26), 3 states have internal predecessors, (26), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 39 [2022-11-02 20:11:57,399 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:11:57,400 INFO L225 Difference]: With dead ends: 41 [2022-11-02 20:11:57,400 INFO L226 Difference]: Without dead ends: 27 [2022-11-02 20:11:57,401 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-11-02 20:11:57,407 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 1 mSDsluCounter, 23 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 6 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-02 20:11:57,410 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 49 Invalid, 6 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-02 20:11:57,411 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2022-11-02 20:11:57,414 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 26. [2022-11-02 20:11:57,415 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 21 states have (on average 1.1904761904761905) internal successors, (25), 21 states have internal predecessors, (25), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-02 20:11:57,420 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 31 transitions. [2022-11-02 20:11:57,420 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 31 transitions. Word has length 39 [2022-11-02 20:11:57,421 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:11:57,421 INFO L495 AbstractCegarLoop]: Abstraction has 26 states and 31 transitions. [2022-11-02 20:11:57,422 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 8.666666666666666) internal successors, (26), 3 states have internal predecessors, (26), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-11-02 20:11:57,422 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 31 transitions. [2022-11-02 20:11:57,423 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-11-02 20:11:57,423 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:11:57,423 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:11:57,459 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3e69c30-59bd-4153-96f2-cade2e830f3f/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-02 20:11:57,637 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3e69c30-59bd-4153-96f2-cade2e830f3f/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:11:57,637 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:11:57,637 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:11:57,638 INFO L85 PathProgramCache]: Analyzing trace with hash -235909079, now seen corresponding path program 1 times [2022-11-02 20:11:57,638 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:11:57,638 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [926463814] [2022-11-02 20:11:57,638 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:11:57,638 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:11:57,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:11:57,772 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2022-11-02 20:11:57,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:11:57,829 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-11-02 20:11:57,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:11:57,841 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2022-11-02 20:11:57,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:11:57,859 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-11-02 20:11:57,859 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:11:57,859 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [926463814] [2022-11-02 20:11:57,859 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [926463814] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:11:57,860 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2134981549] [2022-11-02 20:11:57,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:11:57,860 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:11:57,860 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3e69c30-59bd-4153-96f2-cade2e830f3f/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:11:57,861 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3e69c30-59bd-4153-96f2-cade2e830f3f/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:11:57,885 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3e69c30-59bd-4153-96f2-cade2e830f3f/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-02 20:11:57,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:11:57,956 INFO L263 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-02 20:11:57,960 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:11:58,016 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2022-11-02 20:11:58,016 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:11:58,085 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2022-11-02 20:11:58,086 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2134981549] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:11:58,086 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 20:11:58,087 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 4, 4] total 9 [2022-11-02 20:11:58,088 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1671977311] [2022-11-02 20:11:58,088 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 20:11:58,088 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-02 20:11:58,089 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:11:58,089 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-02 20:11:58,089 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2022-11-02 20:11:58,090 INFO L87 Difference]: Start difference. First operand 26 states and 31 transitions. Second operand has 9 states, 9 states have (on average 4.444444444444445) internal successors, (40), 9 states have internal predecessors, (40), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2022-11-02 20:11:58,162 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:11:58,162 INFO L93 Difference]: Finished difference Result 58 states and 76 transitions. [2022-11-02 20:11:58,163 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-02 20:11:58,163 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.444444444444445) internal successors, (40), 9 states have internal predecessors, (40), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) Word has length 41 [2022-11-02 20:11:58,163 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:11:58,164 INFO L225 Difference]: With dead ends: 58 [2022-11-02 20:11:58,164 INFO L226 Difference]: Without dead ends: 37 [2022-11-02 20:11:58,165 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 85 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2022-11-02 20:11:58,166 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 12 mSDsluCounter, 132 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 156 SdHoareTripleChecker+Invalid, 41 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-02 20:11:58,166 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 156 Invalid, 41 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-02 20:11:58,167 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2022-11-02 20:11:58,171 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 35. [2022-11-02 20:11:58,171 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 30 states have (on average 1.1666666666666667) internal successors, (35), 30 states have internal predecessors, (35), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-02 20:11:58,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 41 transitions. [2022-11-02 20:11:58,172 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 41 transitions. Word has length 41 [2022-11-02 20:11:58,173 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:11:58,173 INFO L495 AbstractCegarLoop]: Abstraction has 35 states and 41 transitions. [2022-11-02 20:11:58,173 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 4.444444444444445) internal successors, (40), 9 states have internal predecessors, (40), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2022-11-02 20:11:58,173 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 41 transitions. [2022-11-02 20:11:58,174 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2022-11-02 20:11:58,175 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:11:58,175 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:11:58,204 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3e69c30-59bd-4153-96f2-cade2e830f3f/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-02 20:11:58,385 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3e69c30-59bd-4153-96f2-cade2e830f3f/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:11:58,385 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:11:58,386 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:11:58,386 INFO L85 PathProgramCache]: Analyzing trace with hash 1946429025, now seen corresponding path program 2 times [2022-11-02 20:11:58,386 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:11:58,386 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [72493479] [2022-11-02 20:11:58,386 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:11:58,387 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:11:58,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:11:58,556 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-11-02 20:11:58,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:11:58,574 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-11-02 20:11:58,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:11:58,586 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2022-11-02 20:11:58,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:11:58,604 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 94 trivial. 0 not checked. [2022-11-02 20:11:58,604 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:11:58,605 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [72493479] [2022-11-02 20:11:58,605 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [72493479] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:11:58,605 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [626166490] [2022-11-02 20:11:58,605 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-02 20:11:58,606 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:11:58,606 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3e69c30-59bd-4153-96f2-cade2e830f3f/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:11:58,609 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3e69c30-59bd-4153-96f2-cade2e830f3f/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:11:58,629 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3e69c30-59bd-4153-96f2-cade2e830f3f/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-02 20:11:58,710 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-02 20:11:58,710 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-02 20:11:58,712 INFO L263 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-02 20:11:58,714 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:11:58,765 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 79 trivial. 0 not checked. [2022-11-02 20:11:58,765 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:11:58,849 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 79 trivial. 0 not checked. [2022-11-02 20:11:58,849 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [626166490] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:11:58,849 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 20:11:58,849 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 7, 7] total 14 [2022-11-02 20:11:58,850 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [860229503] [2022-11-02 20:11:58,850 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 20:11:58,850 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-11-02 20:11:58,850 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:11:58,851 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-11-02 20:11:58,853 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2022-11-02 20:11:58,853 INFO L87 Difference]: Start difference. First operand 35 states and 41 transitions. Second operand has 14 states, 14 states have (on average 3.7857142857142856) internal successors, (53), 14 states have internal predecessors, (53), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-11-02 20:11:58,916 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:11:58,916 INFO L93 Difference]: Finished difference Result 74 states and 92 transitions. [2022-11-02 20:11:58,917 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-02 20:11:58,917 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.7857142857142856) internal successors, (53), 14 states have internal predecessors, (53), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 56 [2022-11-02 20:11:58,917 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:11:58,918 INFO L225 Difference]: With dead ends: 74 [2022-11-02 20:11:58,918 INFO L226 Difference]: Without dead ends: 50 [2022-11-02 20:11:58,919 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 108 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2022-11-02 20:11:58,920 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 17 mSDsluCounter, 87 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 111 SdHoareTripleChecker+Invalid, 51 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-02 20:11:58,926 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 111 Invalid, 51 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-02 20:11:58,929 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2022-11-02 20:11:58,935 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 49. [2022-11-02 20:11:58,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 44 states have (on average 1.1136363636363635) internal successors, (49), 44 states have internal predecessors, (49), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-02 20:11:58,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 55 transitions. [2022-11-02 20:11:58,945 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 55 transitions. Word has length 56 [2022-11-02 20:11:58,945 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:11:58,945 INFO L495 AbstractCegarLoop]: Abstraction has 49 states and 55 transitions. [2022-11-02 20:11:58,946 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.7857142857142856) internal successors, (53), 14 states have internal predecessors, (53), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-11-02 20:11:58,947 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 55 transitions. [2022-11-02 20:11:58,948 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2022-11-02 20:11:58,951 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:11:58,952 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 6, 6, 6, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:11:58,992 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3e69c30-59bd-4153-96f2-cade2e830f3f/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-02 20:11:59,152 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3e69c30-59bd-4153-96f2-cade2e830f3f/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:11:59,153 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:11:59,153 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:11:59,153 INFO L85 PathProgramCache]: Analyzing trace with hash 1341839115, now seen corresponding path program 3 times [2022-11-02 20:11:59,153 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:11:59,153 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1327920548] [2022-11-02 20:11:59,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:11:59,154 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:11:59,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:11:59,506 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-11-02 20:11:59,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:11:59,514 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2022-11-02 20:11:59,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:11:59,523 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2022-11-02 20:11:59,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:11:59,532 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 82 trivial. 0 not checked. [2022-11-02 20:11:59,532 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:11:59,533 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1327920548] [2022-11-02 20:11:59,533 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1327920548] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:11:59,533 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [798810139] [2022-11-02 20:11:59,533 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-02 20:11:59,533 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:11:59,534 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3e69c30-59bd-4153-96f2-cade2e830f3f/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:11:59,534 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3e69c30-59bd-4153-96f2-cade2e830f3f/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:11:59,541 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3e69c30-59bd-4153-96f2-cade2e830f3f/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-02 20:11:59,629 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-11-02 20:11:59,629 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-02 20:11:59,630 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-02 20:11:59,633 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:11:59,677 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 40 proven. 5 refuted. 0 times theorem prover too weak. 137 trivial. 0 not checked. [2022-11-02 20:11:59,677 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:11:59,787 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 40 proven. 5 refuted. 0 times theorem prover too weak. 137 trivial. 0 not checked. [2022-11-02 20:11:59,789 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [798810139] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:11:59,790 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 20:11:59,790 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 5, 5] total 19 [2022-11-02 20:11:59,790 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [922099621] [2022-11-02 20:11:59,791 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 20:11:59,792 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-11-02 20:11:59,792 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:11:59,793 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-11-02 20:11:59,793 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=237, Unknown=0, NotChecked=0, Total=342 [2022-11-02 20:11:59,794 INFO L87 Difference]: Start difference. First operand 49 states and 55 transitions. Second operand has 19 states, 19 states have (on average 3.526315789473684) internal successors, (67), 19 states have internal predecessors, (67), 2 states have call successors, (6), 1 states have call predecessors, (6), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-11-02 20:11:59,909 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:11:59,909 INFO L93 Difference]: Finished difference Result 90 states and 113 transitions. [2022-11-02 20:11:59,910 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-11-02 20:11:59,910 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.526315789473684) internal successors, (67), 19 states have internal predecessors, (67), 2 states have call successors, (6), 1 states have call predecessors, (6), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 70 [2022-11-02 20:11:59,912 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:11:59,913 INFO L225 Difference]: With dead ends: 90 [2022-11-02 20:11:59,915 INFO L226 Difference]: Without dead ends: 64 [2022-11-02 20:11:59,915 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 140 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=105, Invalid=237, Unknown=0, NotChecked=0, Total=342 [2022-11-02 20:11:59,916 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 42 mSDsluCounter, 94 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 118 SdHoareTripleChecker+Invalid, 59 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 49 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-02 20:11:59,918 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [42 Valid, 118 Invalid, 59 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 49 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-02 20:11:59,919 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2022-11-02 20:11:59,926 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 63. [2022-11-02 20:11:59,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 58 states have (on average 1.1551724137931034) internal successors, (67), 58 states have internal predecessors, (67), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-02 20:11:59,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 73 transitions. [2022-11-02 20:11:59,931 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 73 transitions. Word has length 70 [2022-11-02 20:11:59,931 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:11:59,931 INFO L495 AbstractCegarLoop]: Abstraction has 63 states and 73 transitions. [2022-11-02 20:11:59,931 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 3.526315789473684) internal successors, (67), 19 states have internal predecessors, (67), 2 states have call successors, (6), 1 states have call predecessors, (6), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-11-02 20:11:59,932 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 73 transitions. [2022-11-02 20:11:59,933 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2022-11-02 20:11:59,933 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:11:59,933 INFO L195 NwaCegarLoop]: trace histogram [18, 18, 18, 11, 11, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:11:59,969 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3e69c30-59bd-4153-96f2-cade2e830f3f/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-02 20:12:00,144 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3e69c30-59bd-4153-96f2-cade2e830f3f/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2022-11-02 20:12:00,145 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:12:00,145 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:12:00,145 INFO L85 PathProgramCache]: Analyzing trace with hash 2138241293, now seen corresponding path program 4 times [2022-11-02 20:12:00,146 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:12:00,146 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1900060341] [2022-11-02 20:12:00,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:12:00,146 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:12:00,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:12:00,713 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2022-11-02 20:12:00,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:12:00,730 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2022-11-02 20:12:00,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:12:00,746 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2022-11-02 20:12:00,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:12:00,762 INFO L134 CoverageAnalysis]: Checked inductivity of 653 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 532 trivial. 0 not checked. [2022-11-02 20:12:00,763 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:12:00,763 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1900060341] [2022-11-02 20:12:00,763 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1900060341] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:12:00,763 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1993063792] [2022-11-02 20:12:00,763 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-02 20:12:00,763 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:12:00,764 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3e69c30-59bd-4153-96f2-cade2e830f3f/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:12:00,765 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3e69c30-59bd-4153-96f2-cade2e830f3f/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:12:00,797 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3e69c30-59bd-4153-96f2-cade2e830f3f/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-02 20:12:00,929 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-02 20:12:00,929 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-02 20:12:00,932 INFO L263 TraceCheckSpWp]: Trace formula consists of 402 conjuncts, 13 conjunts are in the unsatisfiable core [2022-11-02 20:12:00,940 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:12:01,009 INFO L134 CoverageAnalysis]: Checked inductivity of 653 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 532 trivial. 0 not checked. [2022-11-02 20:12:01,010 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:12:01,324 INFO L134 CoverageAnalysis]: Checked inductivity of 653 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 532 trivial. 0 not checked. [2022-11-02 20:12:01,325 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1993063792] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:12:01,325 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 20:12:01,325 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 27 [2022-11-02 20:12:01,325 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [354245595] [2022-11-02 20:12:01,325 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 20:12:01,326 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-11-02 20:12:01,326 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:12:01,327 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-11-02 20:12:01,327 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=351, Invalid=351, Unknown=0, NotChecked=0, Total=702 [2022-11-02 20:12:01,327 INFO L87 Difference]: Start difference. First operand 63 states and 73 transitions. Second operand has 27 states, 27 states have (on average 2.7777777777777777) internal successors, (75), 27 states have internal predecessors, (75), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2022-11-02 20:12:01,460 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:12:01,461 INFO L93 Difference]: Finished difference Result 127 states and 159 transitions. [2022-11-02 20:12:01,461 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-11-02 20:12:01,462 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.7777777777777777) internal successors, (75), 27 states have internal predecessors, (75), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) Word has length 108 [2022-11-02 20:12:01,462 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:12:01,465 INFO L225 Difference]: With dead ends: 127 [2022-11-02 20:12:01,465 INFO L226 Difference]: Without dead ends: 89 [2022-11-02 20:12:01,468 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 234 GetRequests, 209 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=351, Invalid=351, Unknown=0, NotChecked=0, Total=702 [2022-11-02 20:12:01,469 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 36 mSDsluCounter, 48 mSDsCounter, 0 mSdLazyCounter, 53 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 74 SdHoareTripleChecker+Invalid, 69 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 53 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-02 20:12:01,471 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [36 Valid, 74 Invalid, 69 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 53 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-02 20:12:01,472 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2022-11-02 20:12:01,483 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 89. [2022-11-02 20:12:01,484 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89 states, 84 states have (on average 1.1071428571428572) internal successors, (93), 84 states have internal predecessors, (93), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-02 20:12:01,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 99 transitions. [2022-11-02 20:12:01,485 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 99 transitions. Word has length 108 [2022-11-02 20:12:01,485 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:12:01,485 INFO L495 AbstractCegarLoop]: Abstraction has 89 states and 99 transitions. [2022-11-02 20:12:01,486 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.7777777777777777) internal successors, (75), 27 states have internal predecessors, (75), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2022-11-02 20:12:01,486 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 99 transitions. [2022-11-02 20:12:01,487 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2022-11-02 20:12:01,488 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:12:01,488 INFO L195 NwaCegarLoop]: trace histogram [24, 24, 18, 18, 18, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:12:01,529 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3e69c30-59bd-4153-96f2-cade2e830f3f/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-02 20:12:01,688 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3e69c30-59bd-4153-96f2-cade2e830f3f/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:12:01,689 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:12:01,689 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:12:01,690 INFO L85 PathProgramCache]: Analyzing trace with hash 819840039, now seen corresponding path program 5 times [2022-11-02 20:12:01,690 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:12:01,690 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2072994506] [2022-11-02 20:12:01,690 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:12:01,690 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:12:01,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:12:02,726 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2022-11-02 20:12:02,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:12:02,747 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2022-11-02 20:12:02,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:12:02,776 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 107 [2022-11-02 20:12:02,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:12:02,799 INFO L134 CoverageAnalysis]: Checked inductivity of 1108 backedges. 0 proven. 576 refuted. 0 times theorem prover too weak. 532 trivial. 0 not checked. [2022-11-02 20:12:02,801 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:12:02,802 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2072994506] [2022-11-02 20:12:02,802 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2072994506] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:12:02,802 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1376874864] [2022-11-02 20:12:02,802 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-02 20:12:02,802 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:12:02,803 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3e69c30-59bd-4153-96f2-cade2e830f3f/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:12:02,805 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3e69c30-59bd-4153-96f2-cade2e830f3f/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:12:02,837 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3e69c30-59bd-4153-96f2-cade2e830f3f/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-02 20:12:04,468 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 24 check-sat command(s) [2022-11-02 20:12:04,468 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-02 20:12:04,475 INFO L263 TraceCheckSpWp]: Trace formula consists of 459 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-02 20:12:04,479 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:12:04,675 INFO L134 CoverageAnalysis]: Checked inductivity of 1108 backedges. 244 proven. 51 refuted. 0 times theorem prover too weak. 813 trivial. 0 not checked. [2022-11-02 20:12:04,675 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:12:04,918 INFO L134 CoverageAnalysis]: Checked inductivity of 1108 backedges. 0 proven. 299 refuted. 0 times theorem prover too weak. 809 trivial. 0 not checked. [2022-11-02 20:12:04,918 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1376874864] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:12:04,918 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 20:12:04,919 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 9, 9] total 41 [2022-11-02 20:12:04,919 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1228283408] [2022-11-02 20:12:04,919 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 20:12:04,919 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-11-02 20:12:04,920 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:12:04,920 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-11-02 20:12:04,921 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=470, Invalid=1170, Unknown=0, NotChecked=0, Total=1640 [2022-11-02 20:12:04,921 INFO L87 Difference]: Start difference. First operand 89 states and 99 transitions. Second operand has 41 states, 41 states have (on average 2.8780487804878048) internal successors, (118), 41 states have internal predecessors, (118), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 2 states have call successors, (6) [2022-11-02 20:12:05,084 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:12:05,084 INFO L93 Difference]: Finished difference Result 154 states and 193 transitions. [2022-11-02 20:12:05,085 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-11-02 20:12:05,085 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 2.8780487804878048) internal successors, (118), 41 states have internal predecessors, (118), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 2 states have call successors, (6) Word has length 134 [2022-11-02 20:12:05,086 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:12:05,086 INFO L225 Difference]: With dead ends: 154 [2022-11-02 20:12:05,087 INFO L226 Difference]: Without dead ends: 116 [2022-11-02 20:12:05,088 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 299 GetRequests, 260 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 336 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=470, Invalid=1170, Unknown=0, NotChecked=0, Total=1640 [2022-11-02 20:12:05,089 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 88 mSDsluCounter, 170 mSDsCounter, 0 mSdLazyCounter, 102 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 88 SdHoareTripleChecker+Valid, 194 SdHoareTripleChecker+Invalid, 116 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 102 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-02 20:12:05,089 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [88 Valid, 194 Invalid, 116 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 102 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-02 20:12:05,090 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2022-11-02 20:12:05,098 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 115. [2022-11-02 20:12:05,098 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 115 states, 110 states have (on average 1.1545454545454545) internal successors, (127), 110 states have internal predecessors, (127), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-02 20:12:05,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 133 transitions. [2022-11-02 20:12:05,100 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 133 transitions. Word has length 134 [2022-11-02 20:12:05,100 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:12:05,100 INFO L495 AbstractCegarLoop]: Abstraction has 115 states and 133 transitions. [2022-11-02 20:12:05,101 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 2.8780487804878048) internal successors, (118), 41 states have internal predecessors, (118), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 2 states have call successors, (6) [2022-11-02 20:12:05,101 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 133 transitions. [2022-11-02 20:12:05,103 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 209 [2022-11-02 20:12:05,103 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:12:05,104 INFO L195 NwaCegarLoop]: trace histogram [42, 42, 42, 25, 25, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:12:05,145 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3e69c30-59bd-4153-96f2-cade2e830f3f/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-02 20:12:05,319 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3e69c30-59bd-4153-96f2-cade2e830f3f/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:12:05,319 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:12:05,320 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:12:05,320 INFO L85 PathProgramCache]: Analyzing trace with hash 412352681, now seen corresponding path program 6 times [2022-11-02 20:12:05,320 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:12:05,320 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1136717468] [2022-11-02 20:12:05,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:12:05,320 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:12:05,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:12:06,752 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2022-11-02 20:12:06,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:12:06,786 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 102 [2022-11-02 20:12:06,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:12:06,812 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 157 [2022-11-02 20:12:06,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:12:06,837 INFO L134 CoverageAnalysis]: Checked inductivity of 3353 backedges. 0 proven. 625 refuted. 0 times theorem prover too weak. 2728 trivial. 0 not checked. [2022-11-02 20:12:06,838 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:12:06,838 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1136717468] [2022-11-02 20:12:06,838 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1136717468] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:12:06,838 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1400123947] [2022-11-02 20:12:06,838 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-02 20:12:06,838 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:12:06,839 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3e69c30-59bd-4153-96f2-cade2e830f3f/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:12:06,840 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3e69c30-59bd-4153-96f2-cade2e830f3f/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:12:06,865 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3e69c30-59bd-4153-96f2-cade2e830f3f/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-02 20:12:07,010 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-11-02 20:12:07,010 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-02 20:12:07,012 INFO L263 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-02 20:12:07,018 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:12:07,078 INFO L134 CoverageAnalysis]: Checked inductivity of 3353 backedges. 1242 proven. 4 refuted. 0 times theorem prover too weak. 2107 trivial. 0 not checked. [2022-11-02 20:12:07,078 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:12:07,156 INFO L134 CoverageAnalysis]: Checked inductivity of 3353 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3349 trivial. 0 not checked. [2022-11-02 20:12:07,157 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1400123947] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:12:07,157 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 20:12:07,157 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 5, 5] total 34 [2022-11-02 20:12:07,159 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [439660816] [2022-11-02 20:12:07,160 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 20:12:07,161 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-11-02 20:12:07,161 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:12:07,162 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-11-02 20:12:07,162 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=405, Invalid=717, Unknown=0, NotChecked=0, Total=1122 [2022-11-02 20:12:07,163 INFO L87 Difference]: Start difference. First operand 115 states and 133 transitions. Second operand has 34 states, 34 states have (on average 2.735294117647059) internal successors, (93), 34 states have internal predecessors, (93), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-11-02 20:12:07,292 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:12:07,293 INFO L93 Difference]: Finished difference Result 188 states and 228 transitions. [2022-11-02 20:12:07,293 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-11-02 20:12:07,293 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 2.735294117647059) internal successors, (93), 34 states have internal predecessors, (93), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 208 [2022-11-02 20:12:07,294 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:12:07,296 INFO L225 Difference]: With dead ends: 188 [2022-11-02 20:12:07,296 INFO L226 Difference]: Without dead ends: 126 [2022-11-02 20:12:07,298 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 448 GetRequests, 416 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 150 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=405, Invalid=717, Unknown=0, NotChecked=0, Total=1122 [2022-11-02 20:12:07,300 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 35 mSDsluCounter, 175 mSDsCounter, 0 mSdLazyCounter, 92 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 199 SdHoareTripleChecker+Invalid, 102 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 92 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-02 20:12:07,301 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [35 Valid, 199 Invalid, 102 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 92 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-02 20:12:07,302 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2022-11-02 20:12:07,320 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 125. [2022-11-02 20:12:07,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 125 states, 120 states have (on average 1.1416666666666666) internal successors, (137), 120 states have internal predecessors, (137), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-02 20:12:07,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 143 transitions. [2022-11-02 20:12:07,327 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 143 transitions. Word has length 208 [2022-11-02 20:12:07,327 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:12:07,327 INFO L495 AbstractCegarLoop]: Abstraction has 125 states and 143 transitions. [2022-11-02 20:12:07,327 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 2.735294117647059) internal successors, (93), 34 states have internal predecessors, (93), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-11-02 20:12:07,328 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 143 transitions. [2022-11-02 20:12:07,333 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 219 [2022-11-02 20:12:07,333 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:12:07,333 INFO L195 NwaCegarLoop]: trace histogram [42, 42, 42, 26, 26, 6, 6, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:12:07,373 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3e69c30-59bd-4153-96f2-cade2e830f3f/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-11-02 20:12:07,561 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3e69c30-59bd-4153-96f2-cade2e830f3f/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2022-11-02 20:12:07,561 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:12:07,561 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:12:07,562 INFO L85 PathProgramCache]: Analyzing trace with hash 559440675, now seen corresponding path program 7 times [2022-11-02 20:12:07,562 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:12:07,562 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1948625297] [2022-11-02 20:12:07,562 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:12:07,562 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:12:07,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:12:08,906 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2022-11-02 20:12:08,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:12:08,929 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 104 [2022-11-02 20:12:08,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:12:08,952 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 167 [2022-11-02 20:12:08,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:12:08,977 INFO L134 CoverageAnalysis]: Checked inductivity of 3436 backedges. 0 proven. 676 refuted. 0 times theorem prover too weak. 2760 trivial. 0 not checked. [2022-11-02 20:12:08,977 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:12:08,977 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1948625297] [2022-11-02 20:12:08,977 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1948625297] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:12:08,977 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1397606051] [2022-11-02 20:12:08,978 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-02 20:12:08,978 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:12:08,978 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3e69c30-59bd-4153-96f2-cade2e830f3f/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:12:08,979 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3e69c30-59bd-4153-96f2-cade2e830f3f/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:12:08,984 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3e69c30-59bd-4153-96f2-cade2e830f3f/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-02 20:12:09,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:12:09,209 INFO L263 TraceCheckSpWp]: Trace formula consists of 781 conjuncts, 28 conjunts are in the unsatisfiable core [2022-11-02 20:12:09,213 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:12:09,315 INFO L134 CoverageAnalysis]: Checked inductivity of 3436 backedges. 0 proven. 676 refuted. 0 times theorem prover too weak. 2760 trivial. 0 not checked. [2022-11-02 20:12:09,315 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:12:10,585 INFO L134 CoverageAnalysis]: Checked inductivity of 3436 backedges. 0 proven. 676 refuted. 0 times theorem prover too weak. 2760 trivial. 0 not checked. [2022-11-02 20:12:10,585 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1397606051] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:12:10,585 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 20:12:10,586 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29, 29] total 57 [2022-11-02 20:12:10,586 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [503554119] [2022-11-02 20:12:10,586 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 20:12:10,587 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 57 states [2022-11-02 20:12:10,587 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:12:10,588 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2022-11-02 20:12:10,590 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1596, Invalid=1596, Unknown=0, NotChecked=0, Total=3192 [2022-11-02 20:12:10,590 INFO L87 Difference]: Start difference. First operand 125 states and 143 transitions. Second operand has 57 states, 57 states have (on average 2.3684210526315788) internal successors, (135), 57 states have internal predecessors, (135), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2022-11-02 20:12:10,831 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:12:10,831 INFO L93 Difference]: Finished difference Result 251 states and 314 transitions. [2022-11-02 20:12:10,832 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2022-11-02 20:12:10,832 INFO L78 Accepts]: Start accepts. Automaton has has 57 states, 57 states have (on average 2.3684210526315788) internal successors, (135), 57 states have internal predecessors, (135), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) Word has length 218 [2022-11-02 20:12:10,833 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:12:10,834 INFO L225 Difference]: With dead ends: 251 [2022-11-02 20:12:10,834 INFO L226 Difference]: Without dead ends: 181 [2022-11-02 20:12:10,836 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 469 GetRequests, 414 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=1596, Invalid=1596, Unknown=0, NotChecked=0, Total=3192 [2022-11-02 20:12:10,836 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 81 mSDsluCounter, 144 mSDsCounter, 0 mSdLazyCounter, 115 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 81 SdHoareTripleChecker+Valid, 170 SdHoareTripleChecker+Invalid, 148 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 115 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-02 20:12:10,837 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [81 Valid, 170 Invalid, 148 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 115 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-02 20:12:10,837 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 181 states. [2022-11-02 20:12:10,844 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 181 to 181. [2022-11-02 20:12:10,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 181 states, 176 states have (on average 1.0965909090909092) internal successors, (193), 176 states have internal predecessors, (193), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-02 20:12:10,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 181 states to 181 states and 199 transitions. [2022-11-02 20:12:10,846 INFO L78 Accepts]: Start accepts. Automaton has 181 states and 199 transitions. Word has length 218 [2022-11-02 20:12:10,847 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:12:10,847 INFO L495 AbstractCegarLoop]: Abstraction has 181 states and 199 transitions. [2022-11-02 20:12:10,847 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 57 states, 57 states have (on average 2.3684210526315788) internal successors, (135), 57 states have internal predecessors, (135), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2022-11-02 20:12:10,847 INFO L276 IsEmpty]: Start isEmpty. Operand 181 states and 199 transitions. [2022-11-02 20:12:10,851 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 275 [2022-11-02 20:12:10,851 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:12:10,851 INFO L195 NwaCegarLoop]: trace histogram [54, 54, 42, 42, 42, 6, 6, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:12:10,893 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3e69c30-59bd-4153-96f2-cade2e830f3f/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-11-02 20:12:11,077 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3e69c30-59bd-4153-96f2-cade2e830f3f/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:12:11,077 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:12:11,077 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:12:11,077 INFO L85 PathProgramCache]: Analyzing trace with hash 1032547419, now seen corresponding path program 8 times [2022-11-02 20:12:11,078 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:12:11,078 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1950956563] [2022-11-02 20:12:11,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:12:11,078 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:12:11,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:12:14,739 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 111 [2022-11-02 20:12:14,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:12:14,763 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 160 [2022-11-02 20:12:14,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:12:14,794 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 223 [2022-11-02 20:12:14,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:12:14,818 INFO L134 CoverageAnalysis]: Checked inductivity of 5676 backedges. 0 proven. 2916 refuted. 0 times theorem prover too weak. 2760 trivial. 0 not checked. [2022-11-02 20:12:14,818 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:12:14,819 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1950956563] [2022-11-02 20:12:14,819 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1950956563] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:12:14,819 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [131433561] [2022-11-02 20:12:14,819 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-02 20:12:14,819 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:12:14,819 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3e69c30-59bd-4153-96f2-cade2e830f3f/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:12:14,821 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3e69c30-59bd-4153-96f2-cade2e830f3f/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:12:14,852 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3e69c30-59bd-4153-96f2-cade2e830f3f/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-11-02 20:12:15,119 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-02 20:12:15,120 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-02 20:12:15,149 INFO L263 TraceCheckSpWp]: Trace formula consists of 1033 conjuncts, 56 conjunts are in the unsatisfiable core [2022-11-02 20:12:15,156 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:12:15,404 INFO L134 CoverageAnalysis]: Checked inductivity of 5676 backedges. 0 proven. 2916 refuted. 0 times theorem prover too weak. 2760 trivial. 0 not checked. [2022-11-02 20:12:15,405 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:12:17,419 INFO L134 CoverageAnalysis]: Checked inductivity of 5676 backedges. 0 proven. 2916 refuted. 0 times theorem prover too weak. 2760 trivial. 0 not checked. [2022-11-02 20:12:17,420 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [131433561] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:12:17,420 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 20:12:17,420 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [57, 57, 57] total 63 [2022-11-02 20:12:17,420 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1809768575] [2022-11-02 20:12:17,421 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 20:12:17,421 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 63 states [2022-11-02 20:12:17,422 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:12:17,422 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2022-11-02 20:12:17,424 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1953, Invalid=1953, Unknown=0, NotChecked=0, Total=3906 [2022-11-02 20:12:17,424 INFO L87 Difference]: Start difference. First operand 181 states and 199 transitions. Second operand has 63 states, 63 states have (on average 2.365079365079365) internal successors, (149), 63 states have internal predecessors, (149), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2022-11-02 20:12:17,631 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:12:17,631 INFO L93 Difference]: Finished difference Result 263 states and 304 transitions. [2022-11-02 20:12:17,632 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2022-11-02 20:12:17,632 INFO L78 Accepts]: Start accepts. Automaton has has 63 states, 63 states have (on average 2.365079365079365) internal successors, (149), 63 states have internal predecessors, (149), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) Word has length 274 [2022-11-02 20:12:17,632 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:12:17,633 INFO L225 Difference]: With dead ends: 263 [2022-11-02 20:12:17,633 INFO L226 Difference]: Without dead ends: 193 [2022-11-02 20:12:17,635 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 609 GetRequests, 498 SyntacticMatches, 50 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1691 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=1953, Invalid=1953, Unknown=0, NotChecked=0, Total=3906 [2022-11-02 20:12:17,636 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 60 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 124 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 98 SdHoareTripleChecker+Invalid, 129 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 124 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-02 20:12:17,636 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [60 Valid, 98 Invalid, 129 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 124 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-02 20:12:17,637 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193 states. [2022-11-02 20:12:17,643 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193 to 193. [2022-11-02 20:12:17,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 193 states, 188 states have (on average 1.0904255319148937) internal successors, (205), 188 states have internal predecessors, (205), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-02 20:12:17,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 193 states to 193 states and 211 transitions. [2022-11-02 20:12:17,645 INFO L78 Accepts]: Start accepts. Automaton has 193 states and 211 transitions. Word has length 274 [2022-11-02 20:12:17,645 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:12:17,645 INFO L495 AbstractCegarLoop]: Abstraction has 193 states and 211 transitions. [2022-11-02 20:12:17,646 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 63 states, 63 states have (on average 2.365079365079365) internal successors, (149), 63 states have internal predecessors, (149), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2022-11-02 20:12:17,646 INFO L276 IsEmpty]: Start isEmpty. Operand 193 states and 211 transitions. [2022-11-02 20:12:17,649 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 287 [2022-11-02 20:12:17,650 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:12:17,650 INFO L195 NwaCegarLoop]: trace histogram [60, 60, 42, 42, 42, 6, 6, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:12:17,685 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3e69c30-59bd-4153-96f2-cade2e830f3f/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-11-02 20:12:17,865 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3e69c30-59bd-4153-96f2-cade2e830f3f/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-11-02 20:12:17,865 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:12:17,865 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:12:17,865 INFO L85 PathProgramCache]: Analyzing trace with hash -33288217, now seen corresponding path program 9 times [2022-11-02 20:12:17,866 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:12:17,866 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1301540156] [2022-11-02 20:12:17,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:12:17,866 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:12:18,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:12:18,675 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 123 [2022-11-02 20:12:18,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:12:18,930 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 172 [2022-11-02 20:12:18,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:12:18,951 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 235 [2022-11-02 20:12:18,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:12:18,974 INFO L134 CoverageAnalysis]: Checked inductivity of 6360 backedges. 0 proven. 1527 refuted. 0 times theorem prover too weak. 4833 trivial. 0 not checked. [2022-11-02 20:12:18,975 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:12:18,975 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1301540156] [2022-11-02 20:12:18,975 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1301540156] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:12:18,975 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [446428659] [2022-11-02 20:12:18,975 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-02 20:12:18,976 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:12:18,976 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3e69c30-59bd-4153-96f2-cade2e830f3f/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:12:18,977 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3e69c30-59bd-4153-96f2-cade2e830f3f/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:12:18,993 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3e69c30-59bd-4153-96f2-cade2e830f3f/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-11-02 20:12:19,361 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2022-11-02 20:12:19,362 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-02 20:12:19,365 INFO L263 TraceCheckSpWp]: Trace formula consists of 317 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-02 20:12:19,369 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:12:19,495 INFO L134 CoverageAnalysis]: Checked inductivity of 6360 backedges. 1242 proven. 36 refuted. 0 times theorem prover too weak. 5082 trivial. 0 not checked. [2022-11-02 20:12:19,495 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:12:19,667 INFO L134 CoverageAnalysis]: Checked inductivity of 6360 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 6324 trivial. 0 not checked. [2022-11-02 20:12:19,667 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [446428659] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:12:19,667 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 20:12:19,667 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 9, 9] total 31 [2022-11-02 20:12:19,668 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1863376183] [2022-11-02 20:12:19,668 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 20:12:19,669 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-11-02 20:12:19,669 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:12:19,669 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-11-02 20:12:19,670 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=255, Invalid=675, Unknown=0, NotChecked=0, Total=930 [2022-11-02 20:12:19,670 INFO L87 Difference]: Start difference. First operand 193 states and 211 transitions. Second operand has 31 states, 31 states have (on average 3.2580645161290325) internal successors, (101), 31 states have internal predecessors, (101), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-11-02 20:12:19,783 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:12:19,783 INFO L93 Difference]: Finished difference Result 283 states and 331 transitions. [2022-11-02 20:12:19,784 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-11-02 20:12:19,784 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 3.2580645161290325) internal successors, (101), 31 states have internal predecessors, (101), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 286 [2022-11-02 20:12:19,785 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:12:19,786 INFO L225 Difference]: With dead ends: 283 [2022-11-02 20:12:19,786 INFO L226 Difference]: Without dead ends: 214 [2022-11-02 20:12:19,787 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 593 GetRequests, 564 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 196 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=255, Invalid=675, Unknown=0, NotChecked=0, Total=930 [2022-11-02 20:12:19,787 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 99 mSDsluCounter, 113 mSDsCounter, 0 mSdLazyCounter, 76 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 99 SdHoareTripleChecker+Valid, 137 SdHoareTripleChecker+Invalid, 92 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 76 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-02 20:12:19,788 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [99 Valid, 137 Invalid, 92 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 76 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-02 20:12:19,788 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 214 states. [2022-11-02 20:12:19,795 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 214 to 212. [2022-11-02 20:12:19,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 212 states, 207 states have (on average 1.0869565217391304) internal successors, (225), 207 states have internal predecessors, (225), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-02 20:12:19,797 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 212 states to 212 states and 231 transitions. [2022-11-02 20:12:19,797 INFO L78 Accepts]: Start accepts. Automaton has 212 states and 231 transitions. Word has length 286 [2022-11-02 20:12:19,797 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:12:19,797 INFO L495 AbstractCegarLoop]: Abstraction has 212 states and 231 transitions. [2022-11-02 20:12:19,798 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 3.2580645161290325) internal successors, (101), 31 states have internal predecessors, (101), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-11-02 20:12:19,798 INFO L276 IsEmpty]: Start isEmpty. Operand 212 states and 231 transitions. [2022-11-02 20:12:19,802 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 312 [2022-11-02 20:12:19,802 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:12:19,802 INFO L195 NwaCegarLoop]: trace histogram [60, 60, 45, 45, 45, 14, 14, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:12:19,847 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3e69c30-59bd-4153-96f2-cade2e830f3f/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-11-02 20:12:20,013 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3e69c30-59bd-4153-96f2-cade2e830f3f/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-11-02 20:12:20,013 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:12:20,013 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:12:20,013 INFO L85 PathProgramCache]: Analyzing trace with hash -512401555, now seen corresponding path program 10 times [2022-11-02 20:12:20,014 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:12:20,014 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [541349796] [2022-11-02 20:12:20,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:12:20,014 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:12:20,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:12:20,794 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 123 [2022-11-02 20:12:20,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:12:21,080 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 175 [2022-11-02 20:12:21,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:12:21,113 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 257 [2022-11-02 20:12:21,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:12:21,140 INFO L134 CoverageAnalysis]: Checked inductivity of 6916 backedges. 0 proven. 1748 refuted. 0 times theorem prover too weak. 5168 trivial. 0 not checked. [2022-11-02 20:12:21,141 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:12:21,141 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [541349796] [2022-11-02 20:12:21,141 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [541349796] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:12:21,141 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1834488447] [2022-11-02 20:12:21,141 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-02 20:12:21,142 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:12:21,142 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3e69c30-59bd-4153-96f2-cade2e830f3f/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:12:21,145 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3e69c30-59bd-4153-96f2-cade2e830f3f/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:12:21,169 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3e69c30-59bd-4153-96f2-cade2e830f3f/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-11-02 20:12:21,536 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-02 20:12:21,536 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-02 20:12:21,543 INFO L263 TraceCheckSpWp]: Trace formula consists of 1170 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-02 20:12:21,549 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:12:21,634 INFO L134 CoverageAnalysis]: Checked inductivity of 6916 backedges. 1418 proven. 330 refuted. 0 times theorem prover too weak. 5168 trivial. 0 not checked. [2022-11-02 20:12:21,635 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:12:22,111 INFO L134 CoverageAnalysis]: Checked inductivity of 6916 backedges. 1418 proven. 330 refuted. 0 times theorem prover too weak. 5168 trivial. 0 not checked. [2022-11-02 20:12:22,112 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1834488447] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:12:22,114 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 20:12:22,114 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 18] total 34 [2022-11-02 20:12:22,116 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [635764057] [2022-11-02 20:12:22,116 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 20:12:22,117 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-11-02 20:12:22,118 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:12:22,118 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-11-02 20:12:22,119 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=561, Invalid=561, Unknown=0, NotChecked=0, Total=1122 [2022-11-02 20:12:22,119 INFO L87 Difference]: Start difference. First operand 212 states and 231 transitions. Second operand has 34 states, 34 states have (on average 3.6176470588235294) internal successors, (123), 34 states have internal predecessors, (123), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-11-02 20:12:22,239 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:12:22,239 INFO L93 Difference]: Finished difference Result 351 states and 424 transitions. [2022-11-02 20:12:22,240 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-11-02 20:12:22,240 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 3.6176470588235294) internal successors, (123), 34 states have internal predecessors, (123), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 311 [2022-11-02 20:12:22,241 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:12:22,242 INFO L225 Difference]: With dead ends: 351 [2022-11-02 20:12:22,242 INFO L226 Difference]: Without dead ends: 263 [2022-11-02 20:12:22,243 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 644 GetRequests, 612 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=561, Invalid=561, Unknown=0, NotChecked=0, Total=1122 [2022-11-02 20:12:22,244 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 189 mSDsluCounter, 128 mSDsCounter, 0 mSdLazyCounter, 68 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 189 SdHoareTripleChecker+Valid, 154 SdHoareTripleChecker+Invalid, 90 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 68 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-02 20:12:22,245 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [189 Valid, 154 Invalid, 90 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 68 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-02 20:12:22,246 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 263 states. [2022-11-02 20:12:22,254 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 263 to 263. [2022-11-02 20:12:22,254 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 263 states, 258 states have (on average 1.1356589147286822) internal successors, (293), 258 states have internal predecessors, (293), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-02 20:12:22,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 263 states to 263 states and 299 transitions. [2022-11-02 20:12:22,256 INFO L78 Accepts]: Start accepts. Automaton has 263 states and 299 transitions. Word has length 311 [2022-11-02 20:12:22,256 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:12:22,257 INFO L495 AbstractCegarLoop]: Abstraction has 263 states and 299 transitions. [2022-11-02 20:12:22,257 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 3.6176470588235294) internal successors, (123), 34 states have internal predecessors, (123), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-11-02 20:12:22,257 INFO L276 IsEmpty]: Start isEmpty. Operand 263 states and 299 transitions. [2022-11-02 20:12:22,266 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 465 [2022-11-02 20:12:22,266 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:12:22,266 INFO L195 NwaCegarLoop]: trace histogram [96, 96, 96, 60, 60, 14, 14, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:12:22,308 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3e69c30-59bd-4153-96f2-cade2e830f3f/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-11-02 20:12:22,481 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3e69c30-59bd-4153-96f2-cade2e830f3f/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-11-02 20:12:22,481 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:12:22,481 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:12:22,482 INFO L85 PathProgramCache]: Analyzing trace with hash -1295900265, now seen corresponding path program 11 times [2022-11-02 20:12:22,482 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:12:22,482 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [117663612] [2022-11-02 20:12:22,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:12:22,482 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:12:22,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:12:24,459 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 123 [2022-11-02 20:12:24,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:12:25,433 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 226 [2022-11-02 20:12:25,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:12:25,473 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 359 [2022-11-02 20:12:25,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:12:25,516 INFO L134 CoverageAnalysis]: Checked inductivity of 17779 backedges. 0 proven. 7800 refuted. 0 times theorem prover too weak. 9979 trivial. 0 not checked. [2022-11-02 20:12:25,517 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:12:25,517 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [117663612] [2022-11-02 20:12:25,517 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [117663612] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:12:25,517 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1002920960] [2022-11-02 20:12:25,517 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-02 20:12:25,518 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:12:25,518 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3e69c30-59bd-4153-96f2-cade2e830f3f/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:12:25,519 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3e69c30-59bd-4153-96f2-cade2e830f3f/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:12:25,541 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3e69c30-59bd-4153-96f2-cade2e830f3f/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process