./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/reducercommutativity/sep.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_d06f70fa-524f-440b-9b45-d02409a1f846/bin/uautomizer-Dbtcem3rbc/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d06f70fa-524f-440b-9b45-d02409a1f846/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_d06f70fa-524f-440b-9b45-d02409a1f846/bin/uautomizer-Dbtcem3rbc/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d06f70fa-524f-440b-9b45-d02409a1f846/bin/uautomizer-Dbtcem3rbc/config/AutomizerReach.xml -i ../../sv-benchmarks/c/reducercommutativity/sep.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d06f70fa-524f-440b-9b45-d02409a1f846/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_d06f70fa-524f-440b-9b45-d02409a1f846/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 54d2da4a9e5a645ffa7361038eff25cc32e29a265e0324de9bda9a6d773becac --- 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 20:13:18,388 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-02 20:13:18,390 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-02 20:13:18,416 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-02 20:13:18,416 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-02 20:13:18,417 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-02 20:13:18,418 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-02 20:13:18,420 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-02 20:13:18,422 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-02 20:13:18,423 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-02 20:13:18,424 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-02 20:13:18,425 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-02 20:13:18,426 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-02 20:13:18,427 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-02 20:13:18,428 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-02 20:13:18,429 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-02 20:13:18,430 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-02 20:13:18,431 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-02 20:13:18,433 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-02 20:13:18,435 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-02 20:13:18,436 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-02 20:13:18,437 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-02 20:13:18,439 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-02 20:13:18,440 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-02 20:13:18,443 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-02 20:13:18,443 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-02 20:13:18,444 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-02 20:13:18,445 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-02 20:13:18,445 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-02 20:13:18,446 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-02 20:13:18,446 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-02 20:13:18,447 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-02 20:13:18,448 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-02 20:13:18,449 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-02 20:13:18,450 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-02 20:13:18,450 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-02 20:13:18,460 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-02 20:13:18,460 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-02 20:13:18,461 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-02 20:13:18,462 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-02 20:13:18,462 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-02 20:13:18,465 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d06f70fa-524f-440b-9b45-d02409a1f846/bin/uautomizer-Dbtcem3rbc/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-11-02 20:13:18,509 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-02 20:13:18,509 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-02 20:13:18,510 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-02 20:13:18,510 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-02 20:13:18,511 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-02 20:13:18,511 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-02 20:13:18,512 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-02 20:13:18,512 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-02 20:13:18,512 INFO L138 SettingsManager]: * Use SBE=true [2022-11-02 20:13:18,512 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-02 20:13:18,513 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-02 20:13:18,514 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-02 20:13:18,514 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-02 20:13:18,514 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-02 20:13:18,514 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-02 20:13:18,515 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-02 20:13:18,515 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-02 20:13:18,515 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-02 20:13:18,515 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-02 20:13:18,515 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-02 20:13:18,515 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-02 20:13:18,516 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-02 20:13:18,516 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-02 20:13:18,516 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-02 20:13:18,516 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-02 20:13:18,516 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-02 20:13:18,517 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-02 20:13:18,517 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-02 20:13:18,517 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-02 20:13:18,517 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-02 20:13:18,519 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-11-02 20:13:18,519 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-11-02 20:13:18,520 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-02 20:13:18,520 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_d06f70fa-524f-440b-9b45-d02409a1f846/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d06f70fa-524f-440b-9b45-d02409a1f846/bin/uautomizer-Dbtcem3rbc Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 54d2da4a9e5a645ffa7361038eff25cc32e29a265e0324de9bda9a6d773becac [2022-11-02 20:13:18,772 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-02 20:13:18,800 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-02 20:13:18,803 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-02 20:13:18,804 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-02 20:13:18,807 INFO L275 PluginConnector]: CDTParser initialized [2022-11-02 20:13:18,809 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d06f70fa-524f-440b-9b45-d02409a1f846/bin/uautomizer-Dbtcem3rbc/../../sv-benchmarks/c/reducercommutativity/sep.i [2022-11-02 20:13:18,887 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d06f70fa-524f-440b-9b45-d02409a1f846/bin/uautomizer-Dbtcem3rbc/data/d08c9cb76/906da92a584d4c4cba853ad82bccc5ce/FLAG7ca670eb8 [2022-11-02 20:13:19,328 INFO L306 CDTParser]: Found 1 translation units. [2022-11-02 20:13:19,334 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d06f70fa-524f-440b-9b45-d02409a1f846/sv-benchmarks/c/reducercommutativity/sep.i [2022-11-02 20:13:19,347 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d06f70fa-524f-440b-9b45-d02409a1f846/bin/uautomizer-Dbtcem3rbc/data/d08c9cb76/906da92a584d4c4cba853ad82bccc5ce/FLAG7ca670eb8 [2022-11-02 20:13:19,729 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d06f70fa-524f-440b-9b45-d02409a1f846/bin/uautomizer-Dbtcem3rbc/data/d08c9cb76/906da92a584d4c4cba853ad82bccc5ce [2022-11-02 20:13:19,732 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-02 20:13:19,733 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-02 20:13:19,735 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-02 20:13:19,735 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-02 20:13:19,742 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-02 20:13:19,744 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.11 08:13:19" (1/1) ... [2022-11-02 20:13:19,746 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@b9c7356 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:13:19, skipping insertion in model container [2022-11-02 20:13:19,746 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.11 08:13:19" (1/1) ... [2022-11-02 20:13:19,755 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-02 20:13:19,776 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-02 20:13:20,045 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_d06f70fa-524f-440b-9b45-d02409a1f846/sv-benchmarks/c/reducercommutativity/sep.i[1298,1311] [2022-11-02 20:13:20,049 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-02 20:13:20,061 INFO L203 MainTranslator]: Completed pre-run [2022-11-02 20:13:20,104 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_d06f70fa-524f-440b-9b45-d02409a1f846/sv-benchmarks/c/reducercommutativity/sep.i[1298,1311] [2022-11-02 20:13:20,105 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-02 20:13:20,121 INFO L208 MainTranslator]: Completed translation [2022-11-02 20:13:20,121 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:13:20 WrapperNode [2022-11-02 20:13:20,121 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-02 20:13:20,123 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-02 20:13:20,123 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-02 20:13:20,123 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-02 20:13:20,131 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:13:20" (1/1) ... [2022-11-02 20:13:20,150 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:13:20" (1/1) ... [2022-11-02 20:13:20,178 INFO L138 Inliner]: procedures = 16, calls = 26, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 65 [2022-11-02 20:13:20,179 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-02 20:13:20,180 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-02 20:13:20,180 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-02 20:13:20,180 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-02 20:13:20,190 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:13:20" (1/1) ... [2022-11-02 20:13:20,190 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:13:20" (1/1) ... [2022-11-02 20:13:20,196 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:13:20" (1/1) ... [2022-11-02 20:13:20,197 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:13:20" (1/1) ... [2022-11-02 20:13:20,213 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:13:20" (1/1) ... [2022-11-02 20:13:20,216 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:13:20" (1/1) ... [2022-11-02 20:13:20,217 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:13:20" (1/1) ... [2022-11-02 20:13:20,219 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:13:20" (1/1) ... [2022-11-02 20:13:20,220 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-02 20:13:20,221 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-02 20:13:20,221 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-02 20:13:20,221 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-02 20:13:20,225 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:13:20" (1/1) ... [2022-11-02 20:13:20,231 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-02 20:13:20,247 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d06f70fa-524f-440b-9b45-d02409a1f846/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:13:20,265 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d06f70fa-524f-440b-9b45-d02409a1f846/bin/uautomizer-Dbtcem3rbc/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-02 20:13:20,271 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d06f70fa-524f-440b-9b45-d02409a1f846/bin/uautomizer-Dbtcem3rbc/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-02 20:13:20,312 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-02 20:13:20,313 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-02 20:13:20,313 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-02 20:13:20,313 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-02 20:13:20,313 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-02 20:13:20,314 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-02 20:13:20,314 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-02 20:13:20,314 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-02 20:13:20,315 INFO L130 BoogieDeclarations]: Found specification of procedure sep [2022-11-02 20:13:20,315 INFO L138 BoogieDeclarations]: Found implementation of procedure sep [2022-11-02 20:13:20,386 INFO L235 CfgBuilder]: Building ICFG [2022-11-02 20:13:20,389 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-02 20:13:20,570 INFO L276 CfgBuilder]: Performing block encoding [2022-11-02 20:13:20,576 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-02 20:13:20,577 INFO L300 CfgBuilder]: Removed 2 assume(true) statements. [2022-11-02 20:13:20,595 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.11 08:13:20 BoogieIcfgContainer [2022-11-02 20:13:20,595 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-02 20:13:20,598 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-02 20:13:20,598 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-02 20:13:20,612 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-02 20:13:20,612 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.11 08:13:19" (1/3) ... [2022-11-02 20:13:20,613 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@10aca954 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.11 08:13:20, skipping insertion in model container [2022-11-02 20:13:20,613 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:13:20" (2/3) ... [2022-11-02 20:13:20,614 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@10aca954 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.11 08:13:20, skipping insertion in model container [2022-11-02 20:13:20,614 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.11 08:13:20" (3/3) ... [2022-11-02 20:13:20,615 INFO L112 eAbstractionObserver]: Analyzing ICFG sep.i [2022-11-02 20:13:20,660 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-02 20:13:20,661 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-02 20:13:20,744 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-02 20:13:20,760 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;@6c9dc08, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-02 20:13:20,761 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-02 20:13:20,770 INFO L276 IsEmpty]: Start isEmpty. Operand has 27 states, 21 states have (on average 1.380952380952381) internal successors, (29), 22 states have internal predecessors, (29), 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 20:13:20,782 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-11-02 20:13:20,782 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:13:20,783 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 20:13:20,784 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:13:20,795 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:13:20,796 INFO L85 PathProgramCache]: Analyzing trace with hash -1158480486, now seen corresponding path program 1 times [2022-11-02 20:13:20,810 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:13:20,811 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [610990685] [2022-11-02 20:13:20,811 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:13:20,812 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:13:20,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:13:21,242 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-11-02 20:13:21,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:13:21,353 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-11-02 20:13:21,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:13:21,371 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-11-02 20:13:21,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:13:21,400 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-02 20:13:21,405 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:13:21,406 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [610990685] [2022-11-02 20:13:21,407 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [610990685] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:13:21,407 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [623117782] [2022-11-02 20:13:21,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:13:21,409 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:13:21,410 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d06f70fa-524f-440b-9b45-d02409a1f846/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:13:21,413 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d06f70fa-524f-440b-9b45-d02409a1f846/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:13:21,435 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d06f70fa-524f-440b-9b45-d02409a1f846/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-02 20:13:21,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:13:21,537 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 1 conjunts are in the unsatisfiable core [2022-11-02 20:13:21,543 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:13:21,562 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-02 20:13:21,567 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-02 20:13:21,569 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [623117782] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:13:21,569 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-02 20:13:21,569 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 5 [2022-11-02 20:13:21,572 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [355397580] [2022-11-02 20:13:21,573 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:13:21,578 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-02 20:13:21,578 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:13:21,610 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-02 20:13:21,611 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-02 20:13:21,614 INFO L87 Difference]: Start difference. First operand has 27 states, 21 states have (on average 1.380952380952381) internal successors, (29), 22 states have internal predecessors, (29), 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 2 states, 2 states have (on average 9.0) internal successors, (18), 2 states have internal predecessors, (18), 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 20:13:21,645 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:13:21,645 INFO L93 Difference]: Finished difference Result 50 states and 67 transitions. [2022-11-02 20:13:21,646 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-02 20:13:21,648 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 9.0) internal successors, (18), 2 states have internal predecessors, (18), 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 28 [2022-11-02 20:13:21,649 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:13:21,658 INFO L225 Difference]: With dead ends: 50 [2022-11-02 20:13:21,659 INFO L226 Difference]: Without dead ends: 22 [2022-11-02 20:13:21,663 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-02 20:13:21,676 INFO L413 NwaCegarLoop]: 32 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-02 20:13:21,687 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-02 20:13:21,710 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2022-11-02 20:13:21,732 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2022-11-02 20:13:21,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 17 states have (on average 1.1764705882352942) internal successors, (20), 17 states have internal predecessors, (20), 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 20:13:21,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 26 transitions. [2022-11-02 20:13:21,737 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 26 transitions. Word has length 28 [2022-11-02 20:13:21,739 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:13:21,740 INFO L495 AbstractCegarLoop]: Abstraction has 22 states and 26 transitions. [2022-11-02 20:13:21,742 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 9.0) internal successors, (18), 2 states have internal predecessors, (18), 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 20:13:21,743 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 26 transitions. [2022-11-02 20:13:21,747 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-11-02 20:13:21,747 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:13:21,748 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 20:13:21,789 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d06f70fa-524f-440b-9b45-d02409a1f846/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-02 20:13:21,975 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d06f70fa-524f-440b-9b45-d02409a1f846/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:13:21,975 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:13:21,976 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:13:21,976 INFO L85 PathProgramCache]: Analyzing trace with hash 1033293076, now seen corresponding path program 1 times [2022-11-02 20:13:21,977 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:13:21,977 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1312617838] [2022-11-02 20:13:21,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:13:21,977 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:13:22,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:13:22,164 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-11-02 20:13:22,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:13:22,210 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-11-02 20:13:22,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:13:22,229 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-11-02 20:13:22,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:13:22,238 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-02 20:13:22,238 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:13:22,238 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1312617838] [2022-11-02 20:13:22,238 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1312617838] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:13:22,239 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1850439720] [2022-11-02 20:13:22,239 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:13:22,239 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:13:22,239 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d06f70fa-524f-440b-9b45-d02409a1f846/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:13:22,250 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d06f70fa-524f-440b-9b45-d02409a1f846/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:13:22,275 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d06f70fa-524f-440b-9b45-d02409a1f846/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-02 20:13:22,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:13:22,355 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-02 20:13:22,360 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:13:22,414 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-02 20:13:22,415 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-02 20:13:22,415 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1850439720] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:13:22,415 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-02 20:13:22,415 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5] total 6 [2022-11-02 20:13:22,415 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [46255315] [2022-11-02 20:13:22,416 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:13:22,416 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-02 20:13:22,417 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:13:22,417 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-02 20:13:22,417 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-11-02 20:13:22,418 INFO L87 Difference]: Start difference. First operand 22 states and 26 transitions. Second operand has 4 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 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 20:13:22,479 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:13:22,479 INFO L93 Difference]: Finished difference Result 43 states and 55 transitions. [2022-11-02 20:13:22,480 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-02 20:13:22,480 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 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 28 [2022-11-02 20:13:22,480 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:13:22,481 INFO L225 Difference]: With dead ends: 43 [2022-11-02 20:13:22,481 INFO L226 Difference]: Without dead ends: 25 [2022-11-02 20:13:22,483 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 32 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-11-02 20:13:22,485 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 28 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-02 20:13:22,488 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [28 Valid, 30 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-02 20:13:22,492 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2022-11-02 20:13:22,501 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 23. [2022-11-02 20:13:22,501 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 18 states have (on average 1.1666666666666667) internal successors, (21), 18 states have internal predecessors, (21), 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 20:13:22,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 27 transitions. [2022-11-02 20:13:22,505 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 27 transitions. Word has length 28 [2022-11-02 20:13:22,505 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:13:22,505 INFO L495 AbstractCegarLoop]: Abstraction has 23 states and 27 transitions. [2022-11-02 20:13:22,505 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 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 20:13:22,506 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 27 transitions. [2022-11-02 20:13:22,507 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-11-02 20:13:22,507 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:13:22,507 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] [2022-11-02 20:13:22,541 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d06f70fa-524f-440b-9b45-d02409a1f846/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-11-02 20:13:22,721 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d06f70fa-524f-440b-9b45-d02409a1f846/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:13:22,721 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:13:22,722 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:13:22,722 INFO L85 PathProgramCache]: Analyzing trace with hash -14370886, now seen corresponding path program 1 times [2022-11-02 20:13:22,722 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:13:22,722 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2053697371] [2022-11-02 20:13:22,722 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:13:22,723 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:13:22,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:13:22,919 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-11-02 20:13:22,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:13:22,947 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-11-02 20:13:22,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:13:22,969 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2022-11-02 20:13:22,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:13:22,989 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2022-11-02 20:13:22,989 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:13:22,992 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2053697371] [2022-11-02 20:13:22,992 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2053697371] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:13:22,992 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:13:22,992 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-02 20:13:22,993 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1263974193] [2022-11-02 20:13:22,993 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:13:22,993 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-02 20:13:22,993 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:13:22,995 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-02 20:13:22,995 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-02 20:13:22,996 INFO L87 Difference]: Start difference. First operand 23 states and 27 transitions. Second operand has 4 states, 4 states have (on average 4.25) internal successors, (17), 4 states have internal predecessors, (17), 2 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-11-02 20:13:23,048 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:13:23,048 INFO L93 Difference]: Finished difference Result 39 states and 45 transitions. [2022-11-02 20:13:23,049 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-02 20:13:23,049 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.25) internal successors, (17), 4 states have internal predecessors, (17), 2 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 37 [2022-11-02 20:13:23,050 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:13:23,050 INFO L225 Difference]: With dead ends: 39 [2022-11-02 20:13:23,051 INFO L226 Difference]: Without dead ends: 25 [2022-11-02 20:13:23,051 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-02 20:13:23,052 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 21 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-02 20:13:23,053 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [21 Valid, 30 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-02 20:13:23,054 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2022-11-02 20:13:23,058 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 24. [2022-11-02 20:13:23,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 19 states have (on average 1.1578947368421053) internal successors, (22), 19 states have internal predecessors, (22), 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 20:13:23,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 28 transitions. [2022-11-02 20:13:23,059 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 28 transitions. Word has length 37 [2022-11-02 20:13:23,060 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:13:23,060 INFO L495 AbstractCegarLoop]: Abstraction has 24 states and 28 transitions. [2022-11-02 20:13:23,060 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.25) internal successors, (17), 4 states have internal predecessors, (17), 2 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-11-02 20:13:23,060 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 28 transitions. [2022-11-02 20:13:23,061 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-11-02 20:13:23,062 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:13:23,062 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 20:13:23,062 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-02 20:13:23,062 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:13:23,063 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:13:23,063 INFO L85 PathProgramCache]: Analyzing trace with hash 1444896732, now seen corresponding path program 1 times [2022-11-02 20:13:23,063 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:13:23,064 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [655854443] [2022-11-02 20:13:23,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:13:23,064 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:13:23,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:13:23,198 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-11-02 20:13:23,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:13:23,238 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-11-02 20:13:23,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:13:23,247 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-11-02 20:13:23,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:13:23,256 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-11-02 20:13:23,256 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:13:23,257 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [655854443] [2022-11-02 20:13:23,257 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [655854443] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:13:23,257 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [256325343] [2022-11-02 20:13:23,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:13:23,258 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:13:23,258 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d06f70fa-524f-440b-9b45-d02409a1f846/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:13:23,259 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d06f70fa-524f-440b-9b45-d02409a1f846/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:13:23,282 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d06f70fa-524f-440b-9b45-d02409a1f846/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-02 20:13:23,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:13:23,352 INFO L263 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-02 20:13:23,354 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:13:23,436 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 14 proven. 1 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2022-11-02 20:13:23,436 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:13:23,572 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-11-02 20:13:23,572 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [256325343] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:13:23,572 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 20:13:23,573 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 6] total 10 [2022-11-02 20:13:23,573 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [57971051] [2022-11-02 20:13:23,573 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 20:13:23,574 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-02 20:13:23,574 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:13:23,574 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-02 20:13:23,574 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2022-11-02 20:13:23,575 INFO L87 Difference]: Start difference. First operand 24 states and 28 transitions. Second operand has 10 states, 10 states have (on average 4.3) internal successors, (43), 10 states have internal predecessors, (43), 2 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (6), 1 states have call predecessors, (6), 2 states have call successors, (6) [2022-11-02 20:13:23,666 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:13:23,666 INFO L93 Difference]: Finished difference Result 49 states and 62 transitions. [2022-11-02 20:13:23,667 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-02 20:13:23,667 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.3) internal successors, (43), 10 states have internal predecessors, (43), 2 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (6), 1 states have call predecessors, (6), 2 states have call successors, (6) Word has length 39 [2022-11-02 20:13:23,668 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:13:23,668 INFO L225 Difference]: With dead ends: 49 [2022-11-02 20:13:23,668 INFO L226 Difference]: Without dead ends: 29 [2022-11-02 20:13:23,669 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 77 SyntacticMatches, 3 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2022-11-02 20:13:23,670 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 28 mSDsluCounter, 45 mSDsCounter, 0 mSdLazyCounter, 67 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 65 SdHoareTripleChecker+Invalid, 74 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 67 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-02 20:13:23,670 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [28 Valid, 65 Invalid, 74 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 67 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-02 20:13:23,671 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2022-11-02 20:13:23,674 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 27. [2022-11-02 20:13:23,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 22 states have (on average 1.1818181818181819) internal successors, (26), 22 states have internal predecessors, (26), 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 20:13:23,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 32 transitions. [2022-11-02 20:13:23,675 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 32 transitions. Word has length 39 [2022-11-02 20:13:23,676 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:13:23,676 INFO L495 AbstractCegarLoop]: Abstraction has 27 states and 32 transitions. [2022-11-02 20:13:23,676 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.3) internal successors, (43), 10 states have internal predecessors, (43), 2 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (6), 1 states have call predecessors, (6), 2 states have call successors, (6) [2022-11-02 20:13:23,676 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 32 transitions. [2022-11-02 20:13:23,677 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-11-02 20:13:23,677 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:13:23,678 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 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 20:13:23,717 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d06f70fa-524f-440b-9b45-d02409a1f846/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-02 20:13:23,891 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d06f70fa-524f-440b-9b45-d02409a1f846/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:13:23,891 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:13:23,892 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:13:23,892 INFO L85 PathProgramCache]: Analyzing trace with hash -1089239822, now seen corresponding path program 2 times [2022-11-02 20:13:23,892 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:13:23,892 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [949099281] [2022-11-02 20:13:23,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:13:23,892 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:13:24,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:13:24,920 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-11-02 20:13:24,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:13:25,138 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-11-02 20:13:25,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:13:25,391 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2022-11-02 20:13:25,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:13:25,549 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 3 proven. 48 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-11-02 20:13:25,550 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:13:25,550 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [949099281] [2022-11-02 20:13:25,550 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [949099281] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:13:25,550 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [203977749] [2022-11-02 20:13:25,551 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-02 20:13:25,551 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:13:25,551 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d06f70fa-524f-440b-9b45-d02409a1f846/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:13:25,552 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d06f70fa-524f-440b-9b45-d02409a1f846/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:13:25,575 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d06f70fa-524f-440b-9b45-d02409a1f846/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-02 20:13:25,657 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-02 20:13:25,657 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-02 20:13:25,660 INFO L263 TraceCheckSpWp]: Trace formula consists of 202 conjuncts, 37 conjunts are in the unsatisfiable core [2022-11-02 20:13:25,663 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:13:26,252 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2022-11-02 20:13:26,252 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:13:26,766 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2022-11-02 20:13:26,766 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [203977749] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:13:26,766 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 20:13:26,766 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 12] total 18 [2022-11-02 20:13:26,767 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [443292315] [2022-11-02 20:13:26,767 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 20:13:26,767 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-11-02 20:13:26,768 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:13:26,768 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-11-02 20:13:26,768 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=260, Unknown=0, NotChecked=0, Total=306 [2022-11-02 20:13:26,769 INFO L87 Difference]: Start difference. First operand 27 states and 32 transitions. Second operand has 18 states, 17 states have (on average 2.176470588235294) internal successors, (37), 14 states have internal predecessors, (37), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2022-11-02 20:13:26,981 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:13:26,981 INFO L93 Difference]: Finished difference Result 73 states and 101 transitions. [2022-11-02 20:13:26,981 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-02 20:13:26,982 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 2.176470588235294) internal successors, (37), 14 states have internal predecessors, (37), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) Word has length 48 [2022-11-02 20:13:26,982 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:13:26,985 INFO L225 Difference]: With dead ends: 73 [2022-11-02 20:13:26,985 INFO L226 Difference]: Without dead ends: 69 [2022-11-02 20:13:26,986 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 86 SyntacticMatches, 15 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=52, Invalid=290, Unknown=0, NotChecked=0, Total=342 [2022-11-02 20:13:26,986 INFO L413 NwaCegarLoop]: 50 mSDtfsCounter, 35 mSDsluCounter, 428 mSDsCounter, 0 mSdLazyCounter, 204 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 478 SdHoareTripleChecker+Invalid, 210 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 204 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-02 20:13:26,987 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [44 Valid, 478 Invalid, 210 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 204 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-02 20:13:26,988 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2022-11-02 20:13:27,000 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 49. [2022-11-02 20:13:27,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 41 states have (on average 1.2682926829268293) internal successors, (52), 42 states have internal predecessors, (52), 5 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (9), 5 states have call predecessors, (9), 5 states have call successors, (9) [2022-11-02 20:13:27,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 66 transitions. [2022-11-02 20:13:27,002 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 66 transitions. Word has length 48 [2022-11-02 20:13:27,003 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:13:27,003 INFO L495 AbstractCegarLoop]: Abstraction has 49 states and 66 transitions. [2022-11-02 20:13:27,003 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 17 states have (on average 2.176470588235294) internal successors, (37), 14 states have internal predecessors, (37), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2022-11-02 20:13:27,004 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 66 transitions. [2022-11-02 20:13:27,005 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-11-02 20:13:27,005 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:13:27,006 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 5, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:13:27,049 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d06f70fa-524f-440b-9b45-d02409a1f846/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-02 20:13:27,219 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d06f70fa-524f-440b-9b45-d02409a1f846/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:13:27,219 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:13:27,219 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:13:27,220 INFO L85 PathProgramCache]: Analyzing trace with hash -409181452, now seen corresponding path program 1 times [2022-11-02 20:13:27,220 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:13:27,220 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1111880519] [2022-11-02 20:13:27,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:13:27,220 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:13:27,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:13:28,101 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-11-02 20:13:28,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:13:28,160 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-11-02 20:13:28,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:13:28,380 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2022-11-02 20:13:28,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:13:28,617 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 16 proven. 58 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-02 20:13:28,618 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:13:28,618 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1111880519] [2022-11-02 20:13:28,618 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1111880519] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:13:28,618 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [635388740] [2022-11-02 20:13:28,618 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:13:28,619 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:13:28,619 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d06f70fa-524f-440b-9b45-d02409a1f846/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:13:28,620 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d06f70fa-524f-440b-9b45-d02409a1f846/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:13:28,640 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d06f70fa-524f-440b-9b45-d02409a1f846/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-02 20:13:28,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:13:28,709 INFO L263 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 42 conjunts are in the unsatisfiable core [2022-11-02 20:13:28,717 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:13:29,116 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2022-11-02 20:13:29,168 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2022-11-02 20:13:29,573 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 7 proven. 69 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-02 20:13:29,574 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:13:29,879 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 17 [2022-11-02 20:13:29,885 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 24 [2022-11-02 20:13:30,031 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2022-11-02 20:13:30,226 INFO L356 Elim1Store]: treesize reduction 4, result has 73.3 percent of original size [2022-11-02 20:13:30,226 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 23 [2022-11-02 20:13:30,447 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 4 proven. 69 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-02 20:13:30,447 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [635388740] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:13:30,447 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 20:13:30,450 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 20, 18] total 45 [2022-11-02 20:13:30,450 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [47445265] [2022-11-02 20:13:30,454 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 20:13:30,454 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2022-11-02 20:13:30,456 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:13:30,457 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2022-11-02 20:13:30,458 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=279, Invalid=1701, Unknown=0, NotChecked=0, Total=1980 [2022-11-02 20:13:30,459 INFO L87 Difference]: Start difference. First operand 49 states and 66 transitions. Second operand has 45 states, 41 states have (on average 2.4634146341463414) internal successors, (101), 42 states have internal predecessors, (101), 7 states have call successors, (9), 4 states have call predecessors, (9), 7 states have return successors, (9), 5 states have call predecessors, (9), 7 states have call successors, (9) [2022-11-02 20:13:34,338 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:13:34,339 INFO L93 Difference]: Finished difference Result 274 states and 426 transitions. [2022-11-02 20:13:34,340 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2022-11-02 20:13:34,341 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 41 states have (on average 2.4634146341463414) internal successors, (101), 42 states have internal predecessors, (101), 7 states have call successors, (9), 4 states have call predecessors, (9), 7 states have return successors, (9), 5 states have call predecessors, (9), 7 states have call successors, (9) Word has length 48 [2022-11-02 20:13:34,341 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:13:34,344 INFO L225 Difference]: With dead ends: 274 [2022-11-02 20:13:34,344 INFO L226 Difference]: Without dead ends: 225 [2022-11-02 20:13:34,353 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 194 GetRequests, 77 SyntacticMatches, 8 SemanticMatches, 109 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4176 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=1967, Invalid=10243, Unknown=0, NotChecked=0, Total=12210 [2022-11-02 20:13:34,356 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 278 mSDsluCounter, 321 mSDsCounter, 0 mSdLazyCounter, 943 mSolverCounterSat, 219 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 288 SdHoareTripleChecker+Valid, 341 SdHoareTripleChecker+Invalid, 1521 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 219 IncrementalHoareTripleChecker+Valid, 943 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 359 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-11-02 20:13:34,356 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [288 Valid, 341 Invalid, 1521 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [219 Valid, 943 Invalid, 0 Unknown, 359 Unchecked, 1.0s Time] [2022-11-02 20:13:34,359 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 225 states. [2022-11-02 20:13:34,421 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 225 to 161. [2022-11-02 20:13:34,423 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 161 states, 139 states have (on average 1.330935251798561) internal successors, (185), 143 states have internal predecessors, (185), 13 states have call successors, (13), 4 states have call predecessors, (13), 8 states have return successors, (54), 13 states have call predecessors, (54), 13 states have call successors, (54) [2022-11-02 20:13:34,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 252 transitions. [2022-11-02 20:13:34,430 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 252 transitions. Word has length 48 [2022-11-02 20:13:34,431 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:13:34,432 INFO L495 AbstractCegarLoop]: Abstraction has 161 states and 252 transitions. [2022-11-02 20:13:34,432 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 41 states have (on average 2.4634146341463414) internal successors, (101), 42 states have internal predecessors, (101), 7 states have call successors, (9), 4 states have call predecessors, (9), 7 states have return successors, (9), 5 states have call predecessors, (9), 7 states have call successors, (9) [2022-11-02 20:13:34,433 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 252 transitions. [2022-11-02 20:13:34,439 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-11-02 20:13:34,443 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:13:34,444 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 5, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:13:34,484 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d06f70fa-524f-440b-9b45-d02409a1f846/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-02 20:13:34,667 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d06f70fa-524f-440b-9b45-d02409a1f846/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2022-11-02 20:13:34,667 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:13:34,668 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:13:34,668 INFO L85 PathProgramCache]: Analyzing trace with hash 296963572, now seen corresponding path program 2 times [2022-11-02 20:13:34,668 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:13:34,668 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [573759034] [2022-11-02 20:13:34,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:13:34,669 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:13:34,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:13:35,262 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-11-02 20:13:35,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:13:35,420 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-11-02 20:13:35,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:13:35,638 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2022-11-02 20:13:35,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:13:35,646 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 2 proven. 67 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-02 20:13:35,646 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:13:35,646 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [573759034] [2022-11-02 20:13:35,646 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [573759034] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:13:35,646 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [216377944] [2022-11-02 20:13:35,646 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-02 20:13:35,647 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:13:35,647 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d06f70fa-524f-440b-9b45-d02409a1f846/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:13:35,648 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d06f70fa-524f-440b-9b45-d02409a1f846/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:13:35,667 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d06f70fa-524f-440b-9b45-d02409a1f846/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-02 20:13:35,736 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-02 20:13:35,736 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-02 20:13:35,738 INFO L263 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 42 conjunts are in the unsatisfiable core [2022-11-02 20:13:35,744 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:13:36,105 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 10 [2022-11-02 20:13:36,183 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2022-11-02 20:13:37,618 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 7 proven. 69 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-02 20:13:37,618 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:13:37,906 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 18 [2022-11-02 20:13:37,909 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 26 [2022-11-02 20:13:38,065 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 5 [2022-11-02 20:13:40,335 INFO L356 Elim1Store]: treesize reduction 4, result has 73.3 percent of original size [2022-11-02 20:13:40,336 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 23 [2022-11-02 20:13:40,668 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 4 proven. 69 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-02 20:13:40,669 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [216377944] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:13:40,669 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 20:13:40,669 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 20, 18] total 44 [2022-11-02 20:13:40,669 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [649600521] [2022-11-02 20:13:40,671 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 20:13:40,672 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2022-11-02 20:13:40,672 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:13:40,672 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2022-11-02 20:13:40,674 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=239, Invalid=1652, Unknown=1, NotChecked=0, Total=1892 [2022-11-02 20:13:40,674 INFO L87 Difference]: Start difference. First operand 161 states and 252 transitions. Second operand has 44 states, 39 states have (on average 2.717948717948718) internal successors, (106), 40 states have internal predecessors, (106), 9 states have call successors, (9), 4 states have call predecessors, (9), 8 states have return successors, (9), 6 states have call predecessors, (9), 9 states have call successors, (9) [2022-11-02 20:14:57,629 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:14:57,629 INFO L93 Difference]: Finished difference Result 613 states and 960 transitions. [2022-11-02 20:14:57,630 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 104 states. [2022-11-02 20:14:57,630 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 39 states have (on average 2.717948717948718) internal successors, (106), 40 states have internal predecessors, (106), 9 states have call successors, (9), 4 states have call predecessors, (9), 8 states have return successors, (9), 6 states have call predecessors, (9), 9 states have call successors, (9) Word has length 48 [2022-11-02 20:14:57,631 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:14:57,636 INFO L225 Difference]: With dead ends: 613 [2022-11-02 20:14:57,637 INFO L226 Difference]: Without dead ends: 475 [2022-11-02 20:14:57,643 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 232 GetRequests, 88 SyntacticMatches, 9 SemanticMatches, 135 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6704 ImplicationChecksByTransitivity, 79.2s TimeCoverageRelationStatistics Valid=2657, Invalid=15950, Unknown=25, NotChecked=0, Total=18632 [2022-11-02 20:14:57,644 INFO L413 NwaCegarLoop]: 34 mSDtfsCounter, 386 mSDsluCounter, 403 mSDsCounter, 0 mSdLazyCounter, 1170 mSolverCounterSat, 401 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 407 SdHoareTripleChecker+Valid, 437 SdHoareTripleChecker+Invalid, 2274 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 401 IncrementalHoareTripleChecker+Valid, 1170 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 703 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-11-02 20:14:57,645 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [407 Valid, 437 Invalid, 2274 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [401 Valid, 1170 Invalid, 0 Unknown, 703 Unchecked, 1.6s Time] [2022-11-02 20:14:57,646 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 475 states. [2022-11-02 20:14:57,698 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 475 to 280. [2022-11-02 20:14:57,699 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 280 states, 242 states have (on average 1.3512396694214877) internal successors, (327), 252 states have internal predecessors, (327), 21 states have call successors, (21), 6 states have call predecessors, (21), 16 states have return successors, (119), 21 states have call predecessors, (119), 21 states have call successors, (119) [2022-11-02 20:14:57,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 280 states to 280 states and 467 transitions. [2022-11-02 20:14:57,702 INFO L78 Accepts]: Start accepts. Automaton has 280 states and 467 transitions. Word has length 48 [2022-11-02 20:14:57,702 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:14:57,703 INFO L495 AbstractCegarLoop]: Abstraction has 280 states and 467 transitions. [2022-11-02 20:14:57,703 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 39 states have (on average 2.717948717948718) internal successors, (106), 40 states have internal predecessors, (106), 9 states have call successors, (9), 4 states have call predecessors, (9), 8 states have return successors, (9), 6 states have call predecessors, (9), 9 states have call successors, (9) [2022-11-02 20:14:57,703 INFO L276 IsEmpty]: Start isEmpty. Operand 280 states and 467 transitions. [2022-11-02 20:14:57,706 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-11-02 20:14:57,706 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:14:57,706 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 5, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:14:57,747 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d06f70fa-524f-440b-9b45-d02409a1f846/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-02 20:14:57,935 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d06f70fa-524f-440b-9b45-d02409a1f846/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:14:57,935 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:14:57,935 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:14:57,936 INFO L85 PathProgramCache]: Analyzing trace with hash 1360360308, now seen corresponding path program 3 times [2022-11-02 20:14:57,936 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:14:57,936 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [730915562] [2022-11-02 20:14:57,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:14:57,936 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:14:58,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:14:58,478 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-11-02 20:14:58,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:14:58,635 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-11-02 20:14:58,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:14:58,824 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2022-11-02 20:14:58,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:14:58,830 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 2 proven. 67 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-02 20:14:58,831 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:14:58,831 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [730915562] [2022-11-02 20:14:58,831 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [730915562] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:14:58,831 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [225155435] [2022-11-02 20:14:58,831 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-02 20:14:58,831 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:14:58,831 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d06f70fa-524f-440b-9b45-d02409a1f846/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:14:58,833 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d06f70fa-524f-440b-9b45-d02409a1f846/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:14:58,853 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d06f70fa-524f-440b-9b45-d02409a1f846/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-02 20:14:59,096 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2022-11-02 20:14:59,096 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-02 20:14:59,098 INFO L263 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 44 conjunts are in the unsatisfiable core [2022-11-02 20:14:59,101 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:14:59,332 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-02 20:14:59,334 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 23 [2022-11-02 20:14:59,508 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 10 [2022-11-02 20:14:59,576 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2022-11-02 20:15:00,226 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 2 proven. 71 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-02 20:15:00,226 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:15:00,356 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [225155435] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:15:00,356 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-02 20:15:00,356 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 20] total 31 [2022-11-02 20:15:00,356 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [918971999] [2022-11-02 20:15:00,357 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-02 20:15:00,357 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-11-02 20:15:00,357 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:15:00,358 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-11-02 20:15:00,358 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=880, Unknown=0, NotChecked=0, Total=992 [2022-11-02 20:15:00,359 INFO L87 Difference]: Start difference. First operand 280 states and 467 transitions. Second operand has 31 states, 27 states have (on average 2.6666666666666665) internal successors, (72), 27 states have internal predecessors, (72), 6 states have call successors, (6), 4 states have call predecessors, (6), 6 states have return successors, (6), 4 states have call predecessors, (6), 6 states have call successors, (6) [2022-11-02 20:15:02,021 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:15:02,021 INFO L93 Difference]: Finished difference Result 665 states and 1063 transitions. [2022-11-02 20:15:02,022 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-11-02 20:15:02,022 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 27 states have (on average 2.6666666666666665) internal successors, (72), 27 states have internal predecessors, (72), 6 states have call successors, (6), 4 states have call predecessors, (6), 6 states have return successors, (6), 4 states have call predecessors, (6), 6 states have call successors, (6) Word has length 48 [2022-11-02 20:15:02,022 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:15:02,027 INFO L225 Difference]: With dead ends: 665 [2022-11-02 20:15:02,027 INFO L226 Difference]: Without dead ends: 407 [2022-11-02 20:15:02,029 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 49 SyntacticMatches, 2 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1034 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=418, Invalid=3122, Unknown=0, NotChecked=0, Total=3540 [2022-11-02 20:15:02,030 INFO L413 NwaCegarLoop]: 32 mSDtfsCounter, 137 mSDsluCounter, 334 mSDsCounter, 0 mSdLazyCounter, 496 mSolverCounterSat, 74 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 144 SdHoareTripleChecker+Valid, 366 SdHoareTripleChecker+Invalid, 1262 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 74 IncrementalHoareTripleChecker+Valid, 496 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 692 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-02 20:15:02,030 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [144 Valid, 366 Invalid, 1262 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [74 Valid, 496 Invalid, 0 Unknown, 692 Unchecked, 0.5s Time] [2022-11-02 20:15:02,031 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 407 states. [2022-11-02 20:15:02,090 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 407 to 344. [2022-11-02 20:15:02,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 344 states, 298 states have (on average 1.3389261744966443) internal successors, (399), 308 states have internal predecessors, (399), 26 states have call successors, (26), 9 states have call predecessors, (26), 19 states have return successors, (158), 26 states have call predecessors, (158), 26 states have call successors, (158) [2022-11-02 20:15:02,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 344 states to 344 states and 583 transitions. [2022-11-02 20:15:02,095 INFO L78 Accepts]: Start accepts. Automaton has 344 states and 583 transitions. Word has length 48 [2022-11-02 20:15:02,096 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:15:02,096 INFO L495 AbstractCegarLoop]: Abstraction has 344 states and 583 transitions. [2022-11-02 20:15:02,096 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 27 states have (on average 2.6666666666666665) internal successors, (72), 27 states have internal predecessors, (72), 6 states have call successors, (6), 4 states have call predecessors, (6), 6 states have return successors, (6), 4 states have call predecessors, (6), 6 states have call successors, (6) [2022-11-02 20:15:02,096 INFO L276 IsEmpty]: Start isEmpty. Operand 344 states and 583 transitions. [2022-11-02 20:15:02,099 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-11-02 20:15:02,100 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:15:02,100 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 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 20:15:02,140 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d06f70fa-524f-440b-9b45-d02409a1f846/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-02 20:15:02,315 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d06f70fa-524f-440b-9b45-d02409a1f846/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2022-11-02 20:15:02,315 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:15:02,315 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:15:02,315 INFO L85 PathProgramCache]: Analyzing trace with hash -868345224, now seen corresponding path program 4 times [2022-11-02 20:15:02,316 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:15:02,316 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [275496587] [2022-11-02 20:15:02,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:15:02,316 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:15:02,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:15:02,734 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-11-02 20:15:02,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:15:02,846 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-11-02 20:15:02,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:15:02,914 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2022-11-02 20:15:02,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:15:03,030 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-11-02 20:15:03,031 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:15:03,031 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [275496587] [2022-11-02 20:15:03,031 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [275496587] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:15:03,031 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2110470888] [2022-11-02 20:15:03,031 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-02 20:15:03,031 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:15:03,032 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d06f70fa-524f-440b-9b45-d02409a1f846/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:15:03,035 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d06f70fa-524f-440b-9b45-d02409a1f846/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:15:03,043 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d06f70fa-524f-440b-9b45-d02409a1f846/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-02 20:15:03,132 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-02 20:15:03,132 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-02 20:15:03,134 INFO L263 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 37 conjunts are in the unsatisfiable core [2022-11-02 20:15:03,135 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:15:03,541 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2022-11-02 20:15:03,542 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:15:03,840 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2022-11-02 20:15:03,840 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2110470888] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:15:03,840 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 20:15:03,840 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 12] total 18 [2022-11-02 20:15:03,843 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1137523671] [2022-11-02 20:15:03,843 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 20:15:03,843 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-11-02 20:15:03,843 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:15:03,844 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-11-02 20:15:03,844 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=260, Unknown=0, NotChecked=0, Total=306 [2022-11-02 20:15:03,845 INFO L87 Difference]: Start difference. First operand 344 states and 583 transitions. Second operand has 18 states, 17 states have (on average 2.6470588235294117) internal successors, (45), 14 states have internal predecessors, (45), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2022-11-02 20:15:04,114 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:15:04,115 INFO L93 Difference]: Finished difference Result 578 states and 1173 transitions. [2022-11-02 20:15:04,115 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-02 20:15:04,115 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 2.6470588235294117) internal successors, (45), 14 states have internal predecessors, (45), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) Word has length 48 [2022-11-02 20:15:04,117 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:15:04,125 INFO L225 Difference]: With dead ends: 578 [2022-11-02 20:15:04,126 INFO L226 Difference]: Without dead ends: 574 [2022-11-02 20:15:04,128 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 89 SyntacticMatches, 12 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=52, Invalid=290, Unknown=0, NotChecked=0, Total=342 [2022-11-02 20:15:04,131 INFO L413 NwaCegarLoop]: 68 mSDtfsCounter, 26 mSDsluCounter, 538 mSDsCounter, 0 mSdLazyCounter, 227 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 606 SdHoareTripleChecker+Invalid, 232 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 227 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-02 20:15:04,131 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [30 Valid, 606 Invalid, 232 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 227 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-02 20:15:04,132 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 574 states. [2022-11-02 20:15:04,243 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 574 to 446. [2022-11-02 20:15:04,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 446 states, 388 states have (on average 1.3685567010309279) internal successors, (531), 403 states have internal predecessors, (531), 33 states have call successors, (33), 9 states have call predecessors, (33), 24 states have return successors, (259), 33 states have call predecessors, (259), 33 states have call successors, (259) [2022-11-02 20:15:04,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 446 states to 446 states and 823 transitions. [2022-11-02 20:15:04,254 INFO L78 Accepts]: Start accepts. Automaton has 446 states and 823 transitions. Word has length 48 [2022-11-02 20:15:04,254 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:15:04,254 INFO L495 AbstractCegarLoop]: Abstraction has 446 states and 823 transitions. [2022-11-02 20:15:04,255 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 17 states have (on average 2.6470588235294117) internal successors, (45), 14 states have internal predecessors, (45), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2022-11-02 20:15:04,255 INFO L276 IsEmpty]: Start isEmpty. Operand 446 states and 823 transitions. [2022-11-02 20:15:04,261 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-11-02 20:15:04,261 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:15:04,262 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 4, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:15:04,302 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d06f70fa-524f-440b-9b45-d02409a1f846/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-11-02 20:15:04,478 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d06f70fa-524f-440b-9b45-d02409a1f846/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:15:04,478 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:15:04,478 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:15:04,478 INFO L85 PathProgramCache]: Analyzing trace with hash -610179786, now seen corresponding path program 5 times [2022-11-02 20:15:04,479 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:15:04,479 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1282411843] [2022-11-02 20:15:04,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:15:04,479 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:15:04,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:15:05,335 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-11-02 20:15:05,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:15:05,615 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-11-02 20:15:05,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:15:05,628 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2022-11-02 20:15:05,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:15:05,810 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 20 proven. 49 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-02 20:15:05,810 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:15:05,811 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1282411843] [2022-11-02 20:15:05,811 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1282411843] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:15:05,811 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1426963889] [2022-11-02 20:15:05,811 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-02 20:15:05,811 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:15:05,811 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d06f70fa-524f-440b-9b45-d02409a1f846/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:15:05,812 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d06f70fa-524f-440b-9b45-d02409a1f846/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:15:05,816 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d06f70fa-524f-440b-9b45-d02409a1f846/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-02 20:15:05,916 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2022-11-02 20:15:05,916 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-02 20:15:05,918 INFO L263 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 46 conjunts are in the unsatisfiable core [2022-11-02 20:15:05,921 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:15:06,014 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-02 20:15:06,015 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 17 [2022-11-02 20:15:06,298 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-02 20:15:06,299 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-02 20:15:06,302 INFO L356 Elim1Store]: treesize reduction 2, result has 33.3 percent of original size [2022-11-02 20:15:06,303 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 38 [2022-11-02 20:15:06,444 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-02 20:15:06,445 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-02 20:15:06,459 INFO L356 Elim1Store]: treesize reduction 17, result has 46.9 percent of original size [2022-11-02 20:15:06,459 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 41 treesize of output 43 [2022-11-02 20:15:06,756 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 19 proven. 58 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-02 20:15:06,757 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:15:09,098 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1426963889] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:15:09,098 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-02 20:15:09,099 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 20] total 34 [2022-11-02 20:15:09,099 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1231308124] [2022-11-02 20:15:09,099 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-02 20:15:09,100 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-11-02 20:15:09,100 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:15:09,100 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-11-02 20:15:09,101 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=199, Invalid=1439, Unknown=2, NotChecked=0, Total=1640 [2022-11-02 20:15:09,101 INFO L87 Difference]: Start difference. First operand 446 states and 823 transitions. Second operand has 34 states, 32 states have (on average 2.3125) internal successors, (74), 32 states have internal predecessors, (74), 5 states have call successors, (6), 3 states have call predecessors, (6), 6 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) [2022-11-02 20:15:11,893 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:15:11,894 INFO L93 Difference]: Finished difference Result 972 states and 1642 transitions. [2022-11-02 20:15:11,894 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2022-11-02 20:15:11,895 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 32 states have (on average 2.3125) internal successors, (74), 32 states have internal predecessors, (74), 5 states have call successors, (6), 3 states have call predecessors, (6), 6 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) Word has length 48 [2022-11-02 20:15:11,895 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:15:11,901 INFO L225 Difference]: With dead ends: 972 [2022-11-02 20:15:11,902 INFO L226 Difference]: Without dead ends: 673 [2022-11-02 20:15:11,907 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 53 SyntacticMatches, 3 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2106 ImplicationChecksByTransitivity, 4.8s TimeCoverageRelationStatistics Valid=841, Invalid=6129, Unknown=2, NotChecked=0, Total=6972 [2022-11-02 20:15:11,907 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 225 mSDsluCounter, 347 mSDsCounter, 0 mSdLazyCounter, 756 mSolverCounterSat, 204 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 233 SdHoareTripleChecker+Valid, 374 SdHoareTripleChecker+Invalid, 1272 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 204 IncrementalHoareTripleChecker+Valid, 756 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 312 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-11-02 20:15:11,908 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [233 Valid, 374 Invalid, 1272 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [204 Valid, 756 Invalid, 0 Unknown, 312 Unchecked, 0.9s Time] [2022-11-02 20:15:11,909 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 673 states. [2022-11-02 20:15:12,001 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 673 to 470. [2022-11-02 20:15:12,003 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 470 states, 413 states have (on average 1.3438256658595642) internal successors, (555), 424 states have internal predecessors, (555), 32 states have call successors, (32), 15 states have call predecessors, (32), 24 states have return successors, (186), 30 states have call predecessors, (186), 32 states have call successors, (186) [2022-11-02 20:15:12,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 470 states to 470 states and 773 transitions. [2022-11-02 20:15:12,008 INFO L78 Accepts]: Start accepts. Automaton has 470 states and 773 transitions. Word has length 48 [2022-11-02 20:15:12,008 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:15:12,009 INFO L495 AbstractCegarLoop]: Abstraction has 470 states and 773 transitions. [2022-11-02 20:15:12,009 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 32 states have (on average 2.3125) internal successors, (74), 32 states have internal predecessors, (74), 5 states have call successors, (6), 3 states have call predecessors, (6), 6 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) [2022-11-02 20:15:12,009 INFO L276 IsEmpty]: Start isEmpty. Operand 470 states and 773 transitions. [2022-11-02 20:15:12,012 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-11-02 20:15:12,012 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:15:12,013 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 4, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:15:12,049 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d06f70fa-524f-440b-9b45-d02409a1f846/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-11-02 20:15:12,239 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d06f70fa-524f-440b-9b45-d02409a1f846/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:15:12,239 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:15:12,239 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:15:12,240 INFO L85 PathProgramCache]: Analyzing trace with hash -779053714, now seen corresponding path program 6 times [2022-11-02 20:15:12,240 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:15:12,240 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [548519493] [2022-11-02 20:15:12,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:15:12,240 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:15:12,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:15:13,100 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-11-02 20:15:13,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:15:13,153 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-11-02 20:15:13,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:15:13,322 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2022-11-02 20:15:13,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:15:13,605 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 9 proven. 67 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-02 20:15:13,605 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:15:13,605 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [548519493] [2022-11-02 20:15:13,605 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [548519493] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:15:13,605 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1843171047] [2022-11-02 20:15:13,605 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-02 20:15:13,606 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:15:13,606 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d06f70fa-524f-440b-9b45-d02409a1f846/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:15:13,607 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d06f70fa-524f-440b-9b45-d02409a1f846/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:15:13,631 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d06f70fa-524f-440b-9b45-d02409a1f846/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-11-02 20:15:13,907 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2022-11-02 20:15:13,907 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-02 20:15:13,909 INFO L263 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 44 conjunts are in the unsatisfiable core [2022-11-02 20:15:13,913 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:15:14,126 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-02 20:15:14,127 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 23 [2022-11-02 20:15:14,357 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-02 20:15:14,357 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 23 [2022-11-02 20:15:14,429 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-02 20:15:14,430 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-02 20:15:14,441 INFO L356 Elim1Store]: treesize reduction 17, result has 46.9 percent of original size [2022-11-02 20:15:14,442 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 42 treesize of output 44 [2022-11-02 20:15:14,699 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 1 proven. 69 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-02 20:15:14,700 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:15:15,883 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1843171047] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:15:15,883 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-02 20:15:15,883 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 17] total 35 [2022-11-02 20:15:15,883 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [498251969] [2022-11-02 20:15:15,883 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-02 20:15:15,884 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-11-02 20:15:15,884 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:15:15,884 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-11-02 20:15:15,885 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=194, Invalid=1527, Unknown=1, NotChecked=0, Total=1722 [2022-11-02 20:15:15,886 INFO L87 Difference]: Start difference. First operand 470 states and 773 transitions. Second operand has 35 states, 33 states have (on average 2.242424242424242) internal successors, (74), 31 states have internal predecessors, (74), 5 states have call successors, (6), 4 states have call predecessors, (6), 6 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) [2022-11-02 20:15:20,116 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:15:20,116 INFO L93 Difference]: Finished difference Result 1182 states and 1849 transitions. [2022-11-02 20:15:20,117 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 91 states. [2022-11-02 20:15:20,117 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 33 states have (on average 2.242424242424242) internal successors, (74), 31 states have internal predecessors, (74), 5 states have call successors, (6), 4 states have call predecessors, (6), 6 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) Word has length 48 [2022-11-02 20:15:20,117 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:15:20,124 INFO L225 Difference]: With dead ends: 1182 [2022-11-02 20:15:20,124 INFO L226 Difference]: Without dead ends: 984 [2022-11-02 20:15:20,130 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 174 GetRequests, 55 SyntacticMatches, 4 SemanticMatches, 115 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4732 ImplicationChecksByTransitivity, 5.0s TimeCoverageRelationStatistics Valid=1290, Invalid=12281, Unknown=1, NotChecked=0, Total=13572 [2022-11-02 20:15:20,131 INFO L413 NwaCegarLoop]: 36 mSDtfsCounter, 172 mSDsluCounter, 512 mSDsCounter, 0 mSdLazyCounter, 861 mSolverCounterSat, 146 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 191 SdHoareTripleChecker+Valid, 548 SdHoareTripleChecker+Invalid, 1982 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 146 IncrementalHoareTripleChecker+Valid, 861 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 975 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-11-02 20:15:20,131 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [191 Valid, 548 Invalid, 1982 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [146 Valid, 861 Invalid, 0 Unknown, 975 Unchecked, 0.8s Time] [2022-11-02 20:15:20,133 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 984 states. [2022-11-02 20:15:20,285 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 984 to 735. [2022-11-02 20:15:20,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 735 states, 649 states have (on average 1.3343605546995378) internal successors, (866), 671 states have internal predecessors, (866), 43 states have call successors, (43), 21 states have call predecessors, (43), 42 states have return successors, (255), 42 states have call predecessors, (255), 43 states have call successors, (255) [2022-11-02 20:15:20,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 735 states to 735 states and 1164 transitions. [2022-11-02 20:15:20,294 INFO L78 Accepts]: Start accepts. Automaton has 735 states and 1164 transitions. Word has length 48 [2022-11-02 20:15:20,295 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:15:20,295 INFO L495 AbstractCegarLoop]: Abstraction has 735 states and 1164 transitions. [2022-11-02 20:15:20,296 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 33 states have (on average 2.242424242424242) internal successors, (74), 31 states have internal predecessors, (74), 5 states have call successors, (6), 4 states have call predecessors, (6), 6 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) [2022-11-02 20:15:20,296 INFO L276 IsEmpty]: Start isEmpty. Operand 735 states and 1164 transitions. [2022-11-02 20:15:20,300 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-11-02 20:15:20,300 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:15:20,300 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 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 20:15:20,336 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d06f70fa-524f-440b-9b45-d02409a1f846/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-11-02 20:15:20,515 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d06f70fa-524f-440b-9b45-d02409a1f846/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:15:20,515 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:15:20,515 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:15:20,515 INFO L85 PathProgramCache]: Analyzing trace with hash -299993678, now seen corresponding path program 1 times [2022-11-02 20:15:20,515 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:15:20,516 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [890543836] [2022-11-02 20:15:20,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:15:20,516 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:15:20,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:15:20,905 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-11-02 20:15:20,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:15:21,017 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-11-02 20:15:21,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:15:21,095 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2022-11-02 20:15:21,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:15:21,170 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2022-11-02 20:15:21,170 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:15:21,170 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [890543836] [2022-11-02 20:15:21,170 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [890543836] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:15:21,171 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1134078370] [2022-11-02 20:15:21,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:15:21,171 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:15:21,171 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d06f70fa-524f-440b-9b45-d02409a1f846/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:15:21,175 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d06f70fa-524f-440b-9b45-d02409a1f846/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:15:21,197 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d06f70fa-524f-440b-9b45-d02409a1f846/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-11-02 20:15:21,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:15:21,464 INFO L263 TraceCheckSpWp]: Trace formula consists of 196 conjuncts, 37 conjunts are in the unsatisfiable core [2022-11-02 20:15:21,466 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:15:21,866 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2022-11-02 20:15:21,866 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:15:22,250 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2022-11-02 20:15:22,250 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1134078370] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:15:22,250 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 20:15:22,250 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 17 [2022-11-02 20:15:22,251 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [492393887] [2022-11-02 20:15:22,251 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 20:15:22,251 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-11-02 20:15:22,251 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:15:22,251 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-11-02 20:15:22,252 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=230, Unknown=0, NotChecked=0, Total=272 [2022-11-02 20:15:22,252 INFO L87 Difference]: Start difference. First operand 735 states and 1164 transitions. Second operand has 17 states, 16 states have (on average 2.0625) internal successors, (33), 13 states have internal predecessors, (33), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2022-11-02 20:15:22,596 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:15:22,597 INFO L93 Difference]: Finished difference Result 1018 states and 1838 transitions. [2022-11-02 20:15:22,597 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-02 20:15:22,598 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 2.0625) internal successors, (33), 13 states have internal predecessors, (33), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) Word has length 48 [2022-11-02 20:15:22,598 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:15:22,607 INFO L225 Difference]: With dead ends: 1018 [2022-11-02 20:15:22,607 INFO L226 Difference]: Without dead ends: 1014 [2022-11-02 20:15:22,609 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 90 SyntacticMatches, 12 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=47, Invalid=259, Unknown=0, NotChecked=0, Total=306 [2022-11-02 20:15:22,610 INFO L413 NwaCegarLoop]: 59 mSDtfsCounter, 28 mSDsluCounter, 556 mSDsCounter, 0 mSdLazyCounter, 215 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 615 SdHoareTripleChecker+Invalid, 218 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 215 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-02 20:15:22,610 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [34 Valid, 615 Invalid, 218 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 215 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-02 20:15:22,612 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1014 states. [2022-11-02 20:15:22,795 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1014 to 889. [2022-11-02 20:15:22,797 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 889 states, 788 states have (on average 1.3565989847715736) internal successors, (1069), 819 states have internal predecessors, (1069), 50 states have call successors, (50), 21 states have call predecessors, (50), 50 states have return successors, (341), 48 states have call predecessors, (341), 50 states have call successors, (341) [2022-11-02 20:15:22,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 889 states to 889 states and 1460 transitions. [2022-11-02 20:15:22,804 INFO L78 Accepts]: Start accepts. Automaton has 889 states and 1460 transitions. Word has length 48 [2022-11-02 20:15:22,805 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:15:22,805 INFO L495 AbstractCegarLoop]: Abstraction has 889 states and 1460 transitions. [2022-11-02 20:15:22,805 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 16 states have (on average 2.0625) internal successors, (33), 13 states have internal predecessors, (33), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2022-11-02 20:15:22,805 INFO L276 IsEmpty]: Start isEmpty. Operand 889 states and 1460 transitions. [2022-11-02 20:15:22,810 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-11-02 20:15:22,810 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:15:22,810 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 7, 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 20:15:22,850 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d06f70fa-524f-440b-9b45-d02409a1f846/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-11-02 20:15:23,035 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d06f70fa-524f-440b-9b45-d02409a1f846/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:15:23,035 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:15:23,035 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:15:23,035 INFO L85 PathProgramCache]: Analyzing trace with hash 485005286, now seen corresponding path program 3 times [2022-11-02 20:15:23,036 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:15:23,036 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [568855959] [2022-11-02 20:15:23,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:15:23,036 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:15:23,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:15:23,108 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-11-02 20:15:23,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:15:23,147 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-11-02 20:15:23,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:15:23,156 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2022-11-02 20:15:23,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:15:23,236 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 32 proven. 59 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-02 20:15:23,236 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:15:23,236 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [568855959] [2022-11-02 20:15:23,236 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [568855959] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:15:23,237 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2081284536] [2022-11-02 20:15:23,237 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-02 20:15:23,238 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:15:23,238 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d06f70fa-524f-440b-9b45-d02409a1f846/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:15:23,239 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d06f70fa-524f-440b-9b45-d02409a1f846/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:15:23,265 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d06f70fa-524f-440b-9b45-d02409a1f846/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-11-02 20:15:23,339 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-11-02 20:15:23,340 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-02 20:15:23,341 INFO L263 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-02 20:15:23,342 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:15:23,440 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 68 proven. 1 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2022-11-02 20:15:23,440 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:15:23,604 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 66 proven. 1 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2022-11-02 20:15:23,604 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2081284536] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:15:23,604 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 20:15:23,605 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 9] total 18 [2022-11-02 20:15:23,605 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1345684723] [2022-11-02 20:15:23,605 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 20:15:23,605 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-11-02 20:15:23,605 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:15:23,606 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-11-02 20:15:23,606 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=236, Unknown=0, NotChecked=0, Total=306 [2022-11-02 20:15:23,606 INFO L87 Difference]: Start difference. First operand 889 states and 1460 transitions. Second operand has 18 states, 18 states have (on average 3.7777777777777777) internal successors, (68), 18 states have internal predecessors, (68), 2 states have call successors, (5), 2 states have call predecessors, (5), 4 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) [2022-11-02 20:15:23,973 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:15:23,974 INFO L93 Difference]: Finished difference Result 1163 states and 1857 transitions. [2022-11-02 20:15:23,974 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-11-02 20:15:23,975 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.7777777777777777) internal successors, (68), 18 states have internal predecessors, (68), 2 states have call successors, (5), 2 states have call predecessors, (5), 4 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) Word has length 51 [2022-11-02 20:15:23,975 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:15:23,978 INFO L225 Difference]: With dead ends: 1163 [2022-11-02 20:15:23,978 INFO L226 Difference]: Without dead ends: 378 [2022-11-02 20:15:23,985 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 103 SyntacticMatches, 4 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 224 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=199, Invalid=793, Unknown=0, NotChecked=0, Total=992 [2022-11-02 20:15:23,986 INFO L413 NwaCegarLoop]: 41 mSDtfsCounter, 99 mSDsluCounter, 173 mSDsCounter, 0 mSdLazyCounter, 168 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 101 SdHoareTripleChecker+Valid, 214 SdHoareTripleChecker+Invalid, 195 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 168 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-02 20:15:23,987 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [101 Valid, 214 Invalid, 195 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 168 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-02 20:15:23,988 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 378 states. [2022-11-02 20:15:24,047 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 378 to 260. [2022-11-02 20:15:24,048 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 260 states, 229 states have (on average 1.3537117903930131) internal successors, (310), 240 states have internal predecessors, (310), 16 states have call successors, (16), 4 states have call predecessors, (16), 14 states have return successors, (84), 15 states have call predecessors, (84), 16 states have call successors, (84) [2022-11-02 20:15:24,050 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 260 states to 260 states and 410 transitions. [2022-11-02 20:15:24,051 INFO L78 Accepts]: Start accepts. Automaton has 260 states and 410 transitions. Word has length 51 [2022-11-02 20:15:24,052 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:15:24,052 INFO L495 AbstractCegarLoop]: Abstraction has 260 states and 410 transitions. [2022-11-02 20:15:24,053 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 3.7777777777777777) internal successors, (68), 18 states have internal predecessors, (68), 2 states have call successors, (5), 2 states have call predecessors, (5), 4 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) [2022-11-02 20:15:24,053 INFO L276 IsEmpty]: Start isEmpty. Operand 260 states and 410 transitions. [2022-11-02 20:15:24,055 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2022-11-02 20:15:24,055 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:15:24,055 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 9, 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 20:15:24,095 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d06f70fa-524f-440b-9b45-d02409a1f846/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-11-02 20:15:24,283 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d06f70fa-524f-440b-9b45-d02409a1f846/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-11-02 20:15:24,283 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:15:24,283 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:15:24,283 INFO L85 PathProgramCache]: Analyzing trace with hash 820316862, now seen corresponding path program 4 times [2022-11-02 20:15:24,284 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:15:24,284 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [322831458] [2022-11-02 20:15:24,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:15:24,284 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:15:24,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:15:24,722 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-11-02 20:15:24,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:15:24,880 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-11-02 20:15:24,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:15:25,048 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2022-11-02 20:15:25,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:15:25,213 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 108 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2022-11-02 20:15:25,213 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:15:25,214 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [322831458] [2022-11-02 20:15:25,214 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [322831458] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:15:25,214 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2136309317] [2022-11-02 20:15:25,214 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-02 20:15:25,214 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:15:25,215 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d06f70fa-524f-440b-9b45-d02409a1f846/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:15:25,216 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d06f70fa-524f-440b-9b45-d02409a1f846/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:15:25,241 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d06f70fa-524f-440b-9b45-d02409a1f846/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-11-02 20:15:25,327 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-02 20:15:25,327 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-02 20:15:25,329 INFO L263 TraceCheckSpWp]: Trace formula consists of 236 conjuncts, 43 conjunts are in the unsatisfiable core [2022-11-02 20:15:25,331 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:15:25,781 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 108 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2022-11-02 20:15:25,781 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:15:26,239 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 108 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2022-11-02 20:15:26,240 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2136309317] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:15:26,240 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 20:15:26,240 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 19 [2022-11-02 20:15:26,240 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1849891072] [2022-11-02 20:15:26,240 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 20:15:26,241 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-11-02 20:15:26,241 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:15:26,241 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-11-02 20:15:26,241 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=295, Unknown=0, NotChecked=0, Total=342 [2022-11-02 20:15:26,241 INFO L87 Difference]: Start difference. First operand 260 states and 410 transitions. Second operand has 19 states, 18 states have (on average 2.1666666666666665) internal successors, (39), 15 states have internal predecessors, (39), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2022-11-02 20:15:26,561 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:15:26,561 INFO L93 Difference]: Finished difference Result 376 states and 668 transitions. [2022-11-02 20:15:26,561 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-11-02 20:15:26,562 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 18 states have (on average 2.1666666666666665) internal successors, (39), 15 states have internal predecessors, (39), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) Word has length 59 [2022-11-02 20:15:26,562 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:15:26,565 INFO L225 Difference]: With dead ends: 376 [2022-11-02 20:15:26,565 INFO L226 Difference]: Without dead ends: 372 [2022-11-02 20:15:26,566 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 110 SyntacticMatches, 15 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=52, Invalid=328, Unknown=0, NotChecked=0, Total=380 [2022-11-02 20:15:26,567 INFO L413 NwaCegarLoop]: 63 mSDtfsCounter, 38 mSDsluCounter, 639 mSDsCounter, 0 mSdLazyCounter, 306 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 702 SdHoareTripleChecker+Invalid, 317 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 306 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-02 20:15:26,567 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [47 Valid, 702 Invalid, 317 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 306 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-02 20:15:26,568 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 372 states. [2022-11-02 20:15:26,647 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 372 to 300. [2022-11-02 20:15:26,648 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 300 states, 265 states have (on average 1.369811320754717) internal successors, (363), 278 states have internal predecessors, (363), 18 states have call successors, (18), 4 states have call predecessors, (18), 16 states have return successors, (115), 17 states have call predecessors, (115), 18 states have call successors, (115) [2022-11-02 20:15:26,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 300 states to 300 states and 496 transitions. [2022-11-02 20:15:26,651 INFO L78 Accepts]: Start accepts. Automaton has 300 states and 496 transitions. Word has length 59 [2022-11-02 20:15:26,651 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:15:26,651 INFO L495 AbstractCegarLoop]: Abstraction has 300 states and 496 transitions. [2022-11-02 20:15:26,652 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 18 states have (on average 2.1666666666666665) internal successors, (39), 15 states have internal predecessors, (39), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2022-11-02 20:15:26,652 INFO L276 IsEmpty]: Start isEmpty. Operand 300 states and 496 transitions. [2022-11-02 20:15:26,655 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2022-11-02 20:15:26,655 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:15:26,655 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 8, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:15:26,695 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d06f70fa-524f-440b-9b45-d02409a1f846/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-11-02 20:15:26,871 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d06f70fa-524f-440b-9b45-d02409a1f846/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-11-02 20:15:26,871 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:15:26,871 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:15:26,872 INFO L85 PathProgramCache]: Analyzing trace with hash 1500375232, now seen corresponding path program 7 times [2022-11-02 20:15:26,872 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:15:26,872 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1649948353] [2022-11-02 20:15:26,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:15:26,872 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:15:26,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:15:27,511 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-11-02 20:15:27,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:15:27,623 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-11-02 20:15:27,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:15:27,854 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2022-11-02 20:15:27,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:15:28,076 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 10 proven. 135 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-02 20:15:28,076 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:15:28,077 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1649948353] [2022-11-02 20:15:28,077 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1649948353] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:15:28,077 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [416654100] [2022-11-02 20:15:28,077 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-02 20:15:28,077 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:15:28,077 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d06f70fa-524f-440b-9b45-d02409a1f846/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:15:28,078 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d06f70fa-524f-440b-9b45-d02409a1f846/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:15:28,084 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d06f70fa-524f-440b-9b45-d02409a1f846/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-11-02 20:15:28,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:15:28,181 INFO L263 TraceCheckSpWp]: Trace formula consists of 235 conjuncts, 48 conjunts are in the unsatisfiable core [2022-11-02 20:15:28,184 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:15:28,512 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2022-11-02 20:15:28,562 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2022-11-02 20:15:29,061 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 14 proven. 129 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-02 20:15:29,062 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:15:29,447 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 17 [2022-11-02 20:15:29,450 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 24 [2022-11-02 20:15:29,606 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2022-11-02 20:15:29,832 INFO L356 Elim1Store]: treesize reduction 4, result has 73.3 percent of original size [2022-11-02 20:15:29,833 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 23 [2022-11-02 20:15:30,072 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 7 proven. 133 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-11-02 20:15:30,072 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [416654100] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:15:30,072 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 20:15:30,073 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22, 19] total 45 [2022-11-02 20:15:30,073 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1062580104] [2022-11-02 20:15:30,073 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 20:15:30,073 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2022-11-02 20:15:30,074 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:15:30,074 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2022-11-02 20:15:30,075 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=205, Invalid=1775, Unknown=0, NotChecked=0, Total=1980 [2022-11-02 20:15:30,075 INFO L87 Difference]: Start difference. First operand 300 states and 496 transitions. Second operand has 45 states, 41 states have (on average 2.5609756097560976) internal successors, (105), 42 states have internal predecessors, (105), 7 states have call successors, (8), 3 states have call predecessors, (8), 6 states have return successors, (8), 5 states have call predecessors, (8), 7 states have call successors, (8) [2022-11-02 20:15:34,564 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:15:34,565 INFO L93 Difference]: Finished difference Result 1022 states and 1804 transitions. [2022-11-02 20:15:34,565 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2022-11-02 20:15:34,566 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 41 states have (on average 2.5609756097560976) internal successors, (105), 42 states have internal predecessors, (105), 7 states have call successors, (8), 3 states have call predecessors, (8), 6 states have return successors, (8), 5 states have call predecessors, (8), 7 states have call successors, (8) Word has length 59 [2022-11-02 20:15:34,566 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:15:34,575 INFO L225 Difference]: With dead ends: 1022 [2022-11-02 20:15:34,575 INFO L226 Difference]: Without dead ends: 1008 [2022-11-02 20:15:34,581 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 218 GetRequests, 99 SyntacticMatches, 8 SemanticMatches, 111 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4249 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=1590, Invalid=11066, Unknown=0, NotChecked=0, Total=12656 [2022-11-02 20:15:34,583 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 249 mSDsluCounter, 418 mSDsCounter, 0 mSdLazyCounter, 1089 mSolverCounterSat, 152 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 264 SdHoareTripleChecker+Valid, 447 SdHoareTripleChecker+Invalid, 1513 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 152 IncrementalHoareTripleChecker+Valid, 1089 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 272 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-11-02 20:15:34,583 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [264 Valid, 447 Invalid, 1513 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [152 Valid, 1089 Invalid, 0 Unknown, 272 Unchecked, 1.1s Time] [2022-11-02 20:15:34,584 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1008 states. [2022-11-02 20:15:34,794 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1008 to 662. [2022-11-02 20:15:34,796 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 662 states, 599 states have (on average 1.4140233722871451) internal successors, (847), 625 states have internal predecessors, (847), 28 states have call successors, (28), 9 states have call predecessors, (28), 34 states have return successors, (259), 27 states have call predecessors, (259), 28 states have call successors, (259) [2022-11-02 20:15:34,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 662 states to 662 states and 1134 transitions. [2022-11-02 20:15:34,800 INFO L78 Accepts]: Start accepts. Automaton has 662 states and 1134 transitions. Word has length 59 [2022-11-02 20:15:34,801 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:15:34,801 INFO L495 AbstractCegarLoop]: Abstraction has 662 states and 1134 transitions. [2022-11-02 20:15:34,801 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 41 states have (on average 2.5609756097560976) internal successors, (105), 42 states have internal predecessors, (105), 7 states have call successors, (8), 3 states have call predecessors, (8), 6 states have return successors, (8), 5 states have call predecessors, (8), 7 states have call successors, (8) [2022-11-02 20:15:34,801 INFO L276 IsEmpty]: Start isEmpty. Operand 662 states and 1134 transitions. [2022-11-02 20:15:34,813 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2022-11-02 20:15:34,813 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:15:34,814 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 8, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:15:34,857 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d06f70fa-524f-440b-9b45-d02409a1f846/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-11-02 20:15:35,027 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d06f70fa-524f-440b-9b45-d02409a1f846/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-11-02 20:15:35,027 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:15:35,027 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:15:35,028 INFO L85 PathProgramCache]: Analyzing trace with hash 1078482300, now seen corresponding path program 8 times [2022-11-02 20:15:35,028 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:15:35,028 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [536817607] [2022-11-02 20:15:35,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:15:35,028 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:15:35,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:15:36,055 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-11-02 20:15:36,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:15:36,280 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-11-02 20:15:36,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:15:36,294 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2022-11-02 20:15:36,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:15:36,549 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 49 proven. 90 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-11-02 20:15:36,549 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:15:36,549 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [536817607] [2022-11-02 20:15:36,549 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [536817607] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:15:36,549 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [794264455] [2022-11-02 20:15:36,549 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-02 20:15:36,550 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:15:36,550 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d06f70fa-524f-440b-9b45-d02409a1f846/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:15:36,551 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d06f70fa-524f-440b-9b45-d02409a1f846/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:15:36,553 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d06f70fa-524f-440b-9b45-d02409a1f846/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-11-02 20:15:36,789 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-02 20:15:36,789 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-02 20:15:36,791 INFO L263 TraceCheckSpWp]: Trace formula consists of 235 conjuncts, 56 conjunts are in the unsatisfiable core [2022-11-02 20:15:36,794 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:15:37,258 INFO L356 Elim1Store]: treesize reduction 23, result has 28.1 percent of original size [2022-11-02 20:15:37,258 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 26 [2022-11-02 20:15:37,317 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 24 [2022-11-02 20:15:37,400 INFO L356 Elim1Store]: treesize reduction 54, result has 14.3 percent of original size [2022-11-02 20:15:37,401 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 43 treesize of output 30 [2022-11-02 20:15:44,589 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 21 proven. 132 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-02 20:15:44,590 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:15:48,843 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 40 [2022-11-02 20:15:48,851 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 30 [2022-11-02 20:15:49,151 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-02 20:15:49,151 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 48 treesize of output 50 [2022-11-02 20:15:49,166 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 6 [2022-11-02 20:15:49,182 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-02 20:15:49,182 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 44 treesize of output 48 [2022-11-02 20:15:49,785 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 8 proven. 141 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-02 20:15:49,786 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [794264455] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:15:49,786 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 20:15:49,786 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 24, 23] total 62 [2022-11-02 20:15:49,786 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [320391443] [2022-11-02 20:15:49,786 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 20:15:49,787 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 62 states [2022-11-02 20:15:49,787 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:15:49,788 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2022-11-02 20:15:49,789 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=382, Invalid=3395, Unknown=5, NotChecked=0, Total=3782 [2022-11-02 20:15:49,789 INFO L87 Difference]: Start difference. First operand 662 states and 1134 transitions. Second operand has 62 states, 59 states have (on average 2.305084745762712) internal successors, (136), 59 states have internal predecessors, (136), 7 states have call successors, (8), 3 states have call predecessors, (8), 8 states have return successors, (9), 6 states have call predecessors, (9), 7 states have call successors, (9)