./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/list-ext3-properties/sll_of_sll_nondet_append-2.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version e04fb08f Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77673219-29ef-4342-9b9b-2253604e6a6d/bin/uautomizer-tPACEb0tL8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77673219-29ef-4342-9b9b-2253604e6a6d/bin/uautomizer-tPACEb0tL8/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77673219-29ef-4342-9b9b-2253604e6a6d/bin/uautomizer-tPACEb0tL8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77673219-29ef-4342-9b9b-2253604e6a6d/bin/uautomizer-tPACEb0tL8/config/AutomizerReach.xml -i ../../sv-benchmarks/c/list-ext3-properties/sll_of_sll_nondet_append-2.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77673219-29ef-4342-9b9b-2253604e6a6d/bin/uautomizer-tPACEb0tL8/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77673219-29ef-4342-9b9b-2253604e6a6d/bin/uautomizer-tPACEb0tL8 --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 68e1c5cf050539b3ee8f058d38ff7af5aea2a400d05e41e0185e4509f45301e0 --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-e04fb08 [2022-11-16 11:18:14,326 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-16 11:18:14,328 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-16 11:18:14,354 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-16 11:18:14,355 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-16 11:18:14,356 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-16 11:18:14,358 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-16 11:18:14,360 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-16 11:18:14,367 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-16 11:18:14,370 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-16 11:18:14,372 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-16 11:18:14,374 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-16 11:18:14,375 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-16 11:18:14,377 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-16 11:18:14,380 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-16 11:18:14,382 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-16 11:18:14,384 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-16 11:18:14,389 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-16 11:18:14,391 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-16 11:18:14,395 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-16 11:18:14,400 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-16 11:18:14,403 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-16 11:18:14,408 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-16 11:18:14,410 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-16 11:18:14,415 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-16 11:18:14,421 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-16 11:18:14,422 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-16 11:18:14,423 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-16 11:18:14,424 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-16 11:18:14,426 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-16 11:18:14,427 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-16 11:18:14,428 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-16 11:18:14,430 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-16 11:18:14,432 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-16 11:18:14,433 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-16 11:18:14,434 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-16 11:18:14,436 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-16 11:18:14,436 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-16 11:18:14,437 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-16 11:18:14,438 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-16 11:18:14,439 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-16 11:18:14,440 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77673219-29ef-4342-9b9b-2253604e6a6d/bin/uautomizer-tPACEb0tL8/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-11-16 11:18:14,503 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-16 11:18:14,506 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-16 11:18:14,507 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-16 11:18:14,507 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-16 11:18:14,508 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-16 11:18:14,509 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-16 11:18:14,509 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-16 11:18:14,510 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-16 11:18:14,510 INFO L138 SettingsManager]: * Use SBE=true [2022-11-16 11:18:14,510 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-16 11:18:14,512 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-16 11:18:14,512 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-16 11:18:14,513 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-16 11:18:14,513 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-16 11:18:14,513 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-16 11:18:14,514 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-16 11:18:14,514 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-16 11:18:14,514 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-16 11:18:14,514 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-16 11:18:14,515 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-16 11:18:14,515 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-16 11:18:14,515 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-16 11:18:14,516 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-16 11:18:14,516 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-16 11:18:14,516 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-16 11:18:14,517 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-16 11:18:14,517 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-16 11:18:14,517 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-16 11:18:14,518 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-16 11:18:14,518 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-16 11:18:14,518 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-11-16 11:18:14,518 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-11-16 11:18:14,519 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-16 11:18:14,519 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_77673219-29ef-4342-9b9b-2253604e6a6d/bin/uautomizer-tPACEb0tL8/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77673219-29ef-4342-9b9b-2253604e6a6d/bin/uautomizer-tPACEb0tL8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 68e1c5cf050539b3ee8f058d38ff7af5aea2a400d05e41e0185e4509f45301e0 [2022-11-16 11:18:14,853 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-16 11:18:14,881 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-16 11:18:14,884 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-16 11:18:14,886 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-16 11:18:14,887 INFO L275 PluginConnector]: CDTParser initialized [2022-11-16 11:18:14,892 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77673219-29ef-4342-9b9b-2253604e6a6d/bin/uautomizer-tPACEb0tL8/../../sv-benchmarks/c/list-ext3-properties/sll_of_sll_nondet_append-2.i [2022-11-16 11:18:14,986 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77673219-29ef-4342-9b9b-2253604e6a6d/bin/uautomizer-tPACEb0tL8/data/63ced9d56/cb33edc068d94c90920bfed59d04bafd/FLAGcc6dafc24 [2022-11-16 11:18:15,636 INFO L306 CDTParser]: Found 1 translation units. [2022-11-16 11:18:15,637 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77673219-29ef-4342-9b9b-2253604e6a6d/sv-benchmarks/c/list-ext3-properties/sll_of_sll_nondet_append-2.i [2022-11-16 11:18:15,668 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77673219-29ef-4342-9b9b-2253604e6a6d/bin/uautomizer-tPACEb0tL8/data/63ced9d56/cb33edc068d94c90920bfed59d04bafd/FLAGcc6dafc24 [2022-11-16 11:18:15,871 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77673219-29ef-4342-9b9b-2253604e6a6d/bin/uautomizer-tPACEb0tL8/data/63ced9d56/cb33edc068d94c90920bfed59d04bafd [2022-11-16 11:18:15,876 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-16 11:18:15,880 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-16 11:18:15,886 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-16 11:18:15,887 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-16 11:18:15,893 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-16 11:18:15,894 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.11 11:18:15" (1/1) ... [2022-11-16 11:18:15,897 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@e996a82 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:18:15, skipping insertion in model container [2022-11-16 11:18:15,898 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.11 11:18:15" (1/1) ... [2022-11-16 11:18:15,909 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-16 11:18:15,951 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-16 11:18:16,334 WARN L229 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77673219-29ef-4342-9b9b-2253604e6a6d/sv-benchmarks/c/list-ext3-properties/sll_of_sll_nondet_append-2.i[25013,25026] [2022-11-16 11:18:16,338 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-16 11:18:16,348 INFO L203 MainTranslator]: Completed pre-run [2022-11-16 11:18:16,398 WARN L229 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77673219-29ef-4342-9b9b-2253604e6a6d/sv-benchmarks/c/list-ext3-properties/sll_of_sll_nondet_append-2.i[25013,25026] [2022-11-16 11:18:16,399 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-16 11:18:16,429 INFO L208 MainTranslator]: Completed translation [2022-11-16 11:18:16,429 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:18:16 WrapperNode [2022-11-16 11:18:16,430 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-16 11:18:16,431 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-16 11:18:16,431 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-16 11:18:16,431 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-16 11:18:16,440 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:18:16" (1/1) ... [2022-11-16 11:18:16,456 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:18:16" (1/1) ... [2022-11-16 11:18:16,502 INFO L138 Inliner]: procedures = 129, calls = 40, calls flagged for inlining = 6, calls inlined = 6, statements flattened = 180 [2022-11-16 11:18:16,502 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-16 11:18:16,504 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-16 11:18:16,504 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-16 11:18:16,504 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-16 11:18:16,515 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:18:16" (1/1) ... [2022-11-16 11:18:16,516 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:18:16" (1/1) ... [2022-11-16 11:18:16,527 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:18:16" (1/1) ... [2022-11-16 11:18:16,528 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:18:16" (1/1) ... [2022-11-16 11:18:16,536 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:18:16" (1/1) ... [2022-11-16 11:18:16,542 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:18:16" (1/1) ... [2022-11-16 11:18:16,560 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:18:16" (1/1) ... [2022-11-16 11:18:16,562 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:18:16" (1/1) ... [2022-11-16 11:18:16,566 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-16 11:18:16,578 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-16 11:18:16,578 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-16 11:18:16,579 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-16 11:18:16,580 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:18:16" (1/1) ... [2022-11-16 11:18:16,587 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-16 11:18:16,602 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77673219-29ef-4342-9b9b-2253604e6a6d/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:18:16,620 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77673219-29ef-4342-9b9b-2253604e6a6d/bin/uautomizer-tPACEb0tL8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-16 11:18:16,627 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77673219-29ef-4342-9b9b-2253604e6a6d/bin/uautomizer-tPACEb0tL8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-16 11:18:16,676 INFO L130 BoogieDeclarations]: Found specification of procedure myexit [2022-11-16 11:18:16,676 INFO L138 BoogieDeclarations]: Found implementation of procedure myexit [2022-11-16 11:18:16,677 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-11-16 11:18:16,677 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-16 11:18:16,677 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-16 11:18:16,677 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2022-11-16 11:18:16,678 INFO L130 BoogieDeclarations]: Found specification of procedure sll_append [2022-11-16 11:18:16,678 INFO L138 BoogieDeclarations]: Found implementation of procedure sll_append [2022-11-16 11:18:16,679 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2022-11-16 11:18:16,680 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-16 11:18:16,680 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2022-11-16 11:18:16,680 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-16 11:18:16,681 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-16 11:18:16,681 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-16 11:18:16,876 INFO L235 CfgBuilder]: Building ICFG [2022-11-16 11:18:16,878 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-16 11:18:16,939 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint myexitFINAL: assume true; [2022-11-16 11:18:17,330 INFO L276 CfgBuilder]: Performing block encoding [2022-11-16 11:18:17,341 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-16 11:18:17,342 INFO L300 CfgBuilder]: Removed 9 assume(true) statements. [2022-11-16 11:18:17,345 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.11 11:18:17 BoogieIcfgContainer [2022-11-16 11:18:17,345 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-16 11:18:17,348 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-16 11:18:17,349 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-16 11:18:17,354 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-16 11:18:17,354 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 16.11 11:18:15" (1/3) ... [2022-11-16 11:18:17,355 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@610955c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.11 11:18:17, skipping insertion in model container [2022-11-16 11:18:17,355 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:18:16" (2/3) ... [2022-11-16 11:18:17,356 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@610955c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.11 11:18:17, skipping insertion in model container [2022-11-16 11:18:17,356 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.11 11:18:17" (3/3) ... [2022-11-16 11:18:17,357 INFO L112 eAbstractionObserver]: Analyzing ICFG sll_of_sll_nondet_append-2.i [2022-11-16 11:18:17,381 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-16 11:18:17,382 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-16 11:18:17,451 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-16 11:18:17,463 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;@2dced616, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-16 11:18:17,464 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-16 11:18:17,472 INFO L276 IsEmpty]: Start isEmpty. Operand has 50 states, 43 states have (on average 1.627906976744186) internal successors, (70), 45 states have internal predecessors, (70), 4 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-16 11:18:17,485 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-11-16 11:18:17,486 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:18:17,487 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:18:17,489 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 11:18:17,500 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:18:17,500 INFO L85 PathProgramCache]: Analyzing trace with hash 284890451, now seen corresponding path program 1 times [2022-11-16 11:18:17,513 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:18:17,514 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1768155372] [2022-11-16 11:18:17,515 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:18:17,515 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:18:17,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:18:17,866 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-11-16 11:18:17,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:18:17,954 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:18:17,955 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:18:17,956 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1768155372] [2022-11-16 11:18:17,957 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1768155372] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:18:17,957 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:18:17,957 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-16 11:18:17,960 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [470498269] [2022-11-16 11:18:17,961 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:18:17,966 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 11:18:17,967 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:18:18,030 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 11:18:18,031 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 11:18:18,034 INFO L87 Difference]: Start difference. First operand has 50 states, 43 states have (on average 1.627906976744186) internal successors, (70), 45 states have internal predecessors, (70), 4 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Second operand has 3 states, 3 states have (on average 5.333333333333333) internal successors, (16), 2 states have internal predecessors, (16), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-16 11:18:18,156 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:18:18,157 INFO L93 Difference]: Finished difference Result 98 states and 152 transitions. [2022-11-16 11:18:18,158 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 11:18:18,160 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.333333333333333) internal successors, (16), 2 states have internal predecessors, (16), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 18 [2022-11-16 11:18:18,161 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:18:18,170 INFO L225 Difference]: With dead ends: 98 [2022-11-16 11:18:18,170 INFO L226 Difference]: Without dead ends: 38 [2022-11-16 11:18:18,174 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 11:18:18,179 INFO L413 NwaCegarLoop]: 63 mSDtfsCounter, 2 mSDsluCounter, 40 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 103 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 11:18:18,181 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 103 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-16 11:18:18,203 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2022-11-16 11:18:18,226 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2022-11-16 11:18:18,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 34 states have (on average 1.3529411764705883) internal successors, (46), 34 states have internal predecessors, (46), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-16 11:18:18,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 50 transitions. [2022-11-16 11:18:18,232 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 50 transitions. Word has length 18 [2022-11-16 11:18:18,232 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:18:18,233 INFO L495 AbstractCegarLoop]: Abstraction has 38 states and 50 transitions. [2022-11-16 11:18:18,233 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 5.333333333333333) internal successors, (16), 2 states have internal predecessors, (16), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-16 11:18:18,233 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 50 transitions. [2022-11-16 11:18:18,235 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-11-16 11:18:18,235 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:18:18,236 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:18:18,236 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-16 11:18:18,236 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 11:18:18,237 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:18:18,238 INFO L85 PathProgramCache]: Analyzing trace with hash 373470279, now seen corresponding path program 1 times [2022-11-16 11:18:18,238 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:18:18,238 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [287121246] [2022-11-16 11:18:18,239 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:18:18,239 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:18:18,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:18:18,425 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-11-16 11:18:18,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:18:18,533 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:18:18,533 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:18:18,533 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [287121246] [2022-11-16 11:18:18,534 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [287121246] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:18:18,534 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:18:18,534 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-16 11:18:18,535 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1010177986] [2022-11-16 11:18:18,535 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:18:18,536 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-16 11:18:18,537 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:18:18,537 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-16 11:18:18,538 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-16 11:18:18,538 INFO L87 Difference]: Start difference. First operand 38 states and 50 transitions. Second operand has 4 states, 4 states have (on average 4.0) internal successors, (16), 3 states have internal predecessors, (16), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-16 11:18:18,642 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:18:18,643 INFO L93 Difference]: Finished difference Result 74 states and 98 transitions. [2022-11-16 11:18:18,643 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-16 11:18:18,644 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.0) internal successors, (16), 3 states have internal predecessors, (16), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 18 [2022-11-16 11:18:18,644 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:18:18,646 INFO L225 Difference]: With dead ends: 74 [2022-11-16 11:18:18,646 INFO L226 Difference]: Without dead ends: 45 [2022-11-16 11:18:18,647 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-16 11:18:18,649 INFO L413 NwaCegarLoop]: 48 mSDtfsCounter, 7 mSDsluCounter, 66 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 114 SdHoareTripleChecker+Invalid, 38 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 11:18:18,650 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 114 Invalid, 38 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-16 11:18:18,651 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2022-11-16 11:18:18,659 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 39. [2022-11-16 11:18:18,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 35 states have (on average 1.3428571428571427) internal successors, (47), 35 states have internal predecessors, (47), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-16 11:18:18,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 51 transitions. [2022-11-16 11:18:18,662 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 51 transitions. Word has length 18 [2022-11-16 11:18:18,662 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:18:18,662 INFO L495 AbstractCegarLoop]: Abstraction has 39 states and 51 transitions. [2022-11-16 11:18:18,663 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.0) internal successors, (16), 3 states have internal predecessors, (16), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-16 11:18:18,663 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 51 transitions. [2022-11-16 11:18:18,664 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-11-16 11:18:18,664 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:18:18,664 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:18:18,665 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-16 11:18:18,665 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 11:18:18,666 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:18:18,666 INFO L85 PathProgramCache]: Analyzing trace with hash -1669671981, now seen corresponding path program 1 times [2022-11-16 11:18:18,667 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:18:18,667 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [962210306] [2022-11-16 11:18:18,667 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:18:18,667 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:18:18,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:18:18,815 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-11-16 11:18:18,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:18:18,853 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 11:18:18,853 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:18:18,854 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [962210306] [2022-11-16 11:18:18,854 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [962210306] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:18:18,854 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:18:18,854 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-16 11:18:18,855 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2034718625] [2022-11-16 11:18:18,855 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:18:18,855 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-16 11:18:18,855 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:18:18,856 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-16 11:18:18,856 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-16 11:18:18,857 INFO L87 Difference]: Start difference. First operand 39 states and 51 transitions. Second operand has 5 states, 5 states have (on average 4.2) internal successors, (21), 4 states have internal predecessors, (21), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-16 11:18:18,995 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:18:18,995 INFO L93 Difference]: Finished difference Result 59 states and 78 transitions. [2022-11-16 11:18:18,995 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-16 11:18:18,996 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.2) internal successors, (21), 4 states have internal predecessors, (21), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 23 [2022-11-16 11:18:18,996 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:18:18,998 INFO L225 Difference]: With dead ends: 59 [2022-11-16 11:18:18,998 INFO L226 Difference]: Without dead ends: 57 [2022-11-16 11:18:18,999 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-11-16 11:18:19,000 INFO L413 NwaCegarLoop]: 38 mSDtfsCounter, 59 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 60 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 110 SdHoareTripleChecker+Invalid, 65 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 60 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 11:18:19,001 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [60 Valid, 110 Invalid, 65 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 60 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-16 11:18:19,002 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2022-11-16 11:18:19,012 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 41. [2022-11-16 11:18:19,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 37 states have (on average 1.3243243243243243) internal successors, (49), 37 states have internal predecessors, (49), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-16 11:18:19,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 53 transitions. [2022-11-16 11:18:19,014 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 53 transitions. Word has length 23 [2022-11-16 11:18:19,014 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:18:19,015 INFO L495 AbstractCegarLoop]: Abstraction has 41 states and 53 transitions. [2022-11-16 11:18:19,015 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.2) internal successors, (21), 4 states have internal predecessors, (21), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-16 11:18:19,015 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 53 transitions. [2022-11-16 11:18:19,016 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-11-16 11:18:19,016 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:18:19,017 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:18:19,017 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-16 11:18:19,017 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 11:18:19,018 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:18:19,018 INFO L85 PathProgramCache]: Analyzing trace with hash 2019272425, now seen corresponding path program 1 times [2022-11-16 11:18:19,018 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:18:19,019 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1072128019] [2022-11-16 11:18:19,019 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:18:19,019 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:18:19,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:18:19,215 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-11-16 11:18:19,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:18:19,238 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 11:18:19,251 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:18:19,252 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1072128019] [2022-11-16 11:18:19,252 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1072128019] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:18:19,252 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:18:19,253 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-16 11:18:19,253 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1885530509] [2022-11-16 11:18:19,253 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:18:19,254 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-16 11:18:19,254 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:18:19,255 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-16 11:18:19,255 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-16 11:18:19,256 INFO L87 Difference]: Start difference. First operand 41 states and 53 transitions. Second operand has 4 states, 4 states have (on average 6.25) internal successors, (25), 3 states have internal predecessors, (25), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-16 11:18:19,375 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:18:19,375 INFO L93 Difference]: Finished difference Result 56 states and 74 transitions. [2022-11-16 11:18:19,376 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-16 11:18:19,376 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.25) internal successors, (25), 3 states have internal predecessors, (25), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 27 [2022-11-16 11:18:19,377 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:18:19,377 INFO L225 Difference]: With dead ends: 56 [2022-11-16 11:18:19,377 INFO L226 Difference]: Without dead ends: 44 [2022-11-16 11:18:19,378 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-16 11:18:19,379 INFO L413 NwaCegarLoop]: 48 mSDtfsCounter, 13 mSDsluCounter, 65 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 113 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 11:18:19,380 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 113 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-16 11:18:19,380 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2022-11-16 11:18:19,387 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 42. [2022-11-16 11:18:19,387 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 38 states have (on average 1.3157894736842106) internal successors, (50), 38 states have internal predecessors, (50), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-16 11:18:19,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 54 transitions. [2022-11-16 11:18:19,389 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 54 transitions. Word has length 27 [2022-11-16 11:18:19,389 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:18:19,389 INFO L495 AbstractCegarLoop]: Abstraction has 42 states and 54 transitions. [2022-11-16 11:18:19,389 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.25) internal successors, (25), 3 states have internal predecessors, (25), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-16 11:18:19,390 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 54 transitions. [2022-11-16 11:18:19,390 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-11-16 11:18:19,391 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:18:19,391 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:18:19,391 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-16 11:18:19,391 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 11:18:19,392 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:18:19,392 INFO L85 PathProgramCache]: Analyzing trace with hash 1738961116, now seen corresponding path program 1 times [2022-11-16 11:18:19,392 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:18:19,392 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2141454206] [2022-11-16 11:18:19,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:18:19,393 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:18:19,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:18:19,507 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-11-16 11:18:19,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:18:19,528 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:18:19,529 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:18:19,529 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2141454206] [2022-11-16 11:18:19,529 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2141454206] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 11:18:19,529 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1807532654] [2022-11-16 11:18:19,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:18:19,530 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:18:19,530 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77673219-29ef-4342-9b9b-2253604e6a6d/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:18:19,534 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77673219-29ef-4342-9b9b-2253604e6a6d/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:18:19,546 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77673219-29ef-4342-9b9b-2253604e6a6d/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-16 11:18:19,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:18:19,691 INFO L263 TraceCheckSpWp]: Trace formula consists of 206 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-16 11:18:19,697 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:18:19,840 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:18:19,841 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:18:19,903 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:18:19,905 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1807532654] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:18:19,905 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 11:18:19,905 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 8 [2022-11-16 11:18:19,909 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [330246027] [2022-11-16 11:18:19,909 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 11:18:19,910 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-16 11:18:19,910 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:18:19,911 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-16 11:18:19,911 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-11-16 11:18:19,911 INFO L87 Difference]: Start difference. First operand 42 states and 54 transitions. Second operand has 8 states, 8 states have (on average 6.5) internal successors, (52), 7 states have internal predecessors, (52), 1 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-11-16 11:18:20,082 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:18:20,083 INFO L93 Difference]: Finished difference Result 94 states and 122 transitions. [2022-11-16 11:18:20,083 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-16 11:18:20,084 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 6.5) internal successors, (52), 7 states have internal predecessors, (52), 1 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 30 [2022-11-16 11:18:20,084 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:18:20,089 INFO L225 Difference]: With dead ends: 94 [2022-11-16 11:18:20,089 INFO L226 Difference]: Without dead ends: 62 [2022-11-16 11:18:20,090 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 57 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-11-16 11:18:20,093 INFO L413 NwaCegarLoop]: 43 mSDtfsCounter, 47 mSDsluCounter, 95 mSDsCounter, 0 mSdLazyCounter, 71 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 138 SdHoareTripleChecker+Invalid, 84 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 71 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 11:18:20,096 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [50 Valid, 138 Invalid, 84 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 71 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-16 11:18:20,099 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2022-11-16 11:18:20,116 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 57. [2022-11-16 11:18:20,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 51 states have (on average 1.3137254901960784) internal successors, (67), 51 states have internal predecessors, (67), 4 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-11-16 11:18:20,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 75 transitions. [2022-11-16 11:18:20,117 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 75 transitions. Word has length 30 [2022-11-16 11:18:20,118 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:18:20,118 INFO L495 AbstractCegarLoop]: Abstraction has 57 states and 75 transitions. [2022-11-16 11:18:20,118 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 6.5) internal successors, (52), 7 states have internal predecessors, (52), 1 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-11-16 11:18:20,118 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 75 transitions. [2022-11-16 11:18:20,127 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-11-16 11:18:20,127 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:18:20,127 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:18:20,140 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77673219-29ef-4342-9b9b-2253604e6a6d/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-16 11:18:20,334 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77673219-29ef-4342-9b9b-2253604e6a6d/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:18:20,334 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 11:18:20,335 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:18:20,335 INFO L85 PathProgramCache]: Analyzing trace with hash -2109667236, now seen corresponding path program 2 times [2022-11-16 11:18:20,335 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:18:20,335 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1048762478] [2022-11-16 11:18:20,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:18:20,336 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:18:20,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:18:20,565 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-11-16 11:18:20,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:18:20,671 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-11-16 11:18:20,671 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:18:20,671 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1048762478] [2022-11-16 11:18:20,671 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1048762478] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:18:20,672 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:18:20,672 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-16 11:18:20,672 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [633685227] [2022-11-16 11:18:20,672 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:18:20,672 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-16 11:18:20,673 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:18:20,673 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-16 11:18:20,673 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-11-16 11:18:20,673 INFO L87 Difference]: Start difference. First operand 57 states and 75 transitions. Second operand has 7 states, 7 states have (on average 4.0) internal successors, (28), 6 states have internal predecessors, (28), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-16 11:18:20,820 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:18:20,820 INFO L93 Difference]: Finished difference Result 86 states and 115 transitions. [2022-11-16 11:18:20,821 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-16 11:18:20,821 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.0) internal successors, (28), 6 states have internal predecessors, (28), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 40 [2022-11-16 11:18:20,822 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:18:20,824 INFO L225 Difference]: With dead ends: 86 [2022-11-16 11:18:20,824 INFO L226 Difference]: Without dead ends: 69 [2022-11-16 11:18:20,825 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2022-11-16 11:18:20,826 INFO L413 NwaCegarLoop]: 42 mSDtfsCounter, 68 mSDsluCounter, 152 mSDsCounter, 0 mSdLazyCounter, 56 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 71 SdHoareTripleChecker+Valid, 194 SdHoareTripleChecker+Invalid, 57 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 56 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 11:18:20,827 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [71 Valid, 194 Invalid, 57 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 56 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-16 11:18:20,827 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2022-11-16 11:18:20,838 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 67. [2022-11-16 11:18:20,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 60 states have (on average 1.3166666666666667) internal successors, (79), 61 states have internal predecessors, (79), 4 states have call successors, (4), 1 states have call predecessors, (4), 2 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) [2022-11-16 11:18:20,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 90 transitions. [2022-11-16 11:18:20,840 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 90 transitions. Word has length 40 [2022-11-16 11:18:20,841 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:18:20,841 INFO L495 AbstractCegarLoop]: Abstraction has 67 states and 90 transitions. [2022-11-16 11:18:20,841 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 4.0) internal successors, (28), 6 states have internal predecessors, (28), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-16 11:18:20,842 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 90 transitions. [2022-11-16 11:18:20,843 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-11-16 11:18:20,843 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:18:20,843 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:18:20,844 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-11-16 11:18:20,844 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 11:18:20,845 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:18:20,845 INFO L85 PathProgramCache]: Analyzing trace with hash 949868902, now seen corresponding path program 1 times [2022-11-16 11:18:20,845 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:18:20,845 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [960511684] [2022-11-16 11:18:20,846 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:18:20,846 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:18:20,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:18:21,015 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-11-16 11:18:21,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:18:21,140 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-11-16 11:18:21,141 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:18:21,141 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [960511684] [2022-11-16 11:18:21,141 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [960511684] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 11:18:21,141 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1318589674] [2022-11-16 11:18:21,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:18:21,142 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:18:21,142 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77673219-29ef-4342-9b9b-2253604e6a6d/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:18:21,143 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77673219-29ef-4342-9b9b-2253604e6a6d/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:18:21,163 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77673219-29ef-4342-9b9b-2253604e6a6d/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-16 11:18:21,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:18:21,323 INFO L263 TraceCheckSpWp]: Trace formula consists of 260 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-16 11:18:21,327 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:18:21,418 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-11-16 11:18:21,419 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:18:21,688 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-11-16 11:18:21,689 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1318589674] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:18:21,689 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 11:18:21,689 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 14 [2022-11-16 11:18:21,689 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [832542222] [2022-11-16 11:18:21,690 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 11:18:21,690 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-11-16 11:18:21,691 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:18:21,691 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-11-16 11:18:21,691 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2022-11-16 11:18:21,692 INFO L87 Difference]: Start difference. First operand 67 states and 90 transitions. Second operand has 14 states, 14 states have (on average 3.642857142857143) internal successors, (51), 13 states have internal predecessors, (51), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-16 11:18:21,885 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:18:21,886 INFO L93 Difference]: Finished difference Result 98 states and 132 transitions. [2022-11-16 11:18:21,886 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-16 11:18:21,887 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.642857142857143) internal successors, (51), 13 states have internal predecessors, (51), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 43 [2022-11-16 11:18:21,887 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:18:21,888 INFO L225 Difference]: With dead ends: 98 [2022-11-16 11:18:21,888 INFO L226 Difference]: Without dead ends: 81 [2022-11-16 11:18:21,889 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 79 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=93, Invalid=249, Unknown=0, NotChecked=0, Total=342 [2022-11-16 11:18:21,890 INFO L413 NwaCegarLoop]: 42 mSDtfsCounter, 158 mSDsluCounter, 228 mSDsCounter, 0 mSdLazyCounter, 70 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 162 SdHoareTripleChecker+Valid, 270 SdHoareTripleChecker+Invalid, 79 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 70 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 11:18:21,891 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [162 Valid, 270 Invalid, 79 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 70 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-16 11:18:21,892 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2022-11-16 11:18:21,903 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 70. [2022-11-16 11:18:21,904 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 63 states have (on average 1.3174603174603174) internal successors, (83), 64 states have internal predecessors, (83), 4 states have call successors, (4), 1 states have call predecessors, (4), 2 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) [2022-11-16 11:18:21,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 94 transitions. [2022-11-16 11:18:21,905 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 94 transitions. Word has length 43 [2022-11-16 11:18:21,906 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:18:21,906 INFO L495 AbstractCegarLoop]: Abstraction has 70 states and 94 transitions. [2022-11-16 11:18:21,906 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.642857142857143) internal successors, (51), 13 states have internal predecessors, (51), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-16 11:18:21,907 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 94 transitions. [2022-11-16 11:18:21,908 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-11-16 11:18:21,908 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:18:21,908 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:18:21,922 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77673219-29ef-4342-9b9b-2253604e6a6d/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-16 11:18:22,115 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77673219-29ef-4342-9b9b-2253604e6a6d/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2022-11-16 11:18:22,116 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 11:18:22,116 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:18:22,117 INFO L85 PathProgramCache]: Analyzing trace with hash -204999652, now seen corresponding path program 2 times [2022-11-16 11:18:22,117 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:18:22,117 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [847144212] [2022-11-16 11:18:22,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:18:22,117 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:18:22,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:18:22,325 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-11-16 11:18:22,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:18:22,514 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-11-16 11:18:22,515 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:18:22,515 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [847144212] [2022-11-16 11:18:22,515 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [847144212] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 11:18:22,515 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [715965081] [2022-11-16 11:18:22,516 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-16 11:18:22,516 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:18:22,516 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77673219-29ef-4342-9b9b-2253604e6a6d/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:18:22,517 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77673219-29ef-4342-9b9b-2253604e6a6d/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:18:22,523 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77673219-29ef-4342-9b9b-2253604e6a6d/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-16 11:18:22,713 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-16 11:18:22,714 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 11:18:22,716 INFO L263 TraceCheckSpWp]: Trace formula consists of 292 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-16 11:18:22,719 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:18:22,826 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-11-16 11:18:22,827 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:18:23,117 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-11-16 11:18:23,117 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [715965081] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:18:23,117 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 11:18:23,118 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 15 [2022-11-16 11:18:23,118 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [355832960] [2022-11-16 11:18:23,118 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 11:18:23,119 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-11-16 11:18:23,119 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:18:23,120 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-11-16 11:18:23,120 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=158, Unknown=0, NotChecked=0, Total=210 [2022-11-16 11:18:23,121 INFO L87 Difference]: Start difference. First operand 70 states and 94 transitions. Second operand has 15 states, 15 states have (on average 3.3333333333333335) internal successors, (50), 14 states have internal predecessors, (50), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-16 11:18:23,352 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:18:23,352 INFO L93 Difference]: Finished difference Result 110 states and 149 transitions. [2022-11-16 11:18:23,353 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-16 11:18:23,353 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.3333333333333335) internal successors, (50), 14 states have internal predecessors, (50), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 46 [2022-11-16 11:18:23,354 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:18:23,355 INFO L225 Difference]: With dead ends: 110 [2022-11-16 11:18:23,355 INFO L226 Difference]: Without dead ends: 93 [2022-11-16 11:18:23,359 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 84 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=138, Invalid=324, Unknown=0, NotChecked=0, Total=462 [2022-11-16 11:18:23,362 INFO L413 NwaCegarLoop]: 42 mSDtfsCounter, 165 mSDsluCounter, 338 mSDsCounter, 0 mSdLazyCounter, 95 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 170 SdHoareTripleChecker+Valid, 380 SdHoareTripleChecker+Invalid, 102 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 95 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 11:18:23,363 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [170 Valid, 380 Invalid, 102 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 95 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-16 11:18:23,364 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2022-11-16 11:18:23,384 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 73. [2022-11-16 11:18:23,384 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 66 states have (on average 1.3181818181818181) internal successors, (87), 67 states have internal predecessors, (87), 4 states have call successors, (4), 1 states have call predecessors, (4), 2 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) [2022-11-16 11:18:23,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 98 transitions. [2022-11-16 11:18:23,390 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 98 transitions. Word has length 46 [2022-11-16 11:18:23,390 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:18:23,391 INFO L495 AbstractCegarLoop]: Abstraction has 73 states and 98 transitions. [2022-11-16 11:18:23,391 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.3333333333333335) internal successors, (50), 14 states have internal predecessors, (50), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-16 11:18:23,391 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 98 transitions. [2022-11-16 11:18:23,393 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2022-11-16 11:18:23,393 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:18:23,393 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:18:23,403 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77673219-29ef-4342-9b9b-2253604e6a6d/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-11-16 11:18:23,600 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77673219-29ef-4342-9b9b-2253604e6a6d/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:18:23,601 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 11:18:23,601 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:18:23,601 INFO L85 PathProgramCache]: Analyzing trace with hash 2088916390, now seen corresponding path program 3 times [2022-11-16 11:18:23,601 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:18:23,601 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1692137664] [2022-11-16 11:18:23,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:18:23,602 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:18:23,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:18:24,569 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-11-16 11:18:24,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:18:25,168 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2022-11-16 11:18:25,168 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:18:25,168 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1692137664] [2022-11-16 11:18:25,168 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1692137664] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:18:25,168 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:18:25,168 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-11-16 11:18:25,168 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [807272620] [2022-11-16 11:18:25,169 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:18:25,169 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-11-16 11:18:25,169 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:18:25,169 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-11-16 11:18:25,169 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=154, Unknown=0, NotChecked=0, Total=182 [2022-11-16 11:18:25,170 INFO L87 Difference]: Start difference. First operand 73 states and 98 transitions. Second operand has 14 states, 14 states have (on average 2.4285714285714284) internal successors, (34), 12 states have internal predecessors, (34), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-16 11:18:26,065 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:18:26,065 INFO L93 Difference]: Finished difference Result 184 states and 282 transitions. [2022-11-16 11:18:26,066 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-11-16 11:18:26,066 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.4285714285714284) internal successors, (34), 12 states have internal predecessors, (34), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 49 [2022-11-16 11:18:26,068 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:18:26,074 INFO L225 Difference]: With dead ends: 184 [2022-11-16 11:18:26,074 INFO L226 Difference]: Without dead ends: 168 [2022-11-16 11:18:26,075 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=96, Invalid=456, Unknown=0, NotChecked=0, Total=552 [2022-11-16 11:18:26,078 INFO L413 NwaCegarLoop]: 76 mSDtfsCounter, 121 mSDsluCounter, 562 mSDsCounter, 0 mSdLazyCounter, 447 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 121 SdHoareTripleChecker+Valid, 638 SdHoareTripleChecker+Invalid, 455 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 447 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-16 11:18:26,078 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [121 Valid, 638 Invalid, 455 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 447 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-16 11:18:26,080 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168 states. [2022-11-16 11:18:26,122 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168 to 106. [2022-11-16 11:18:26,122 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 106 states, 97 states have (on average 1.3402061855670102) internal successors, (130), 99 states have internal predecessors, (130), 5 states have call successors, (5), 1 states have call predecessors, (5), 3 states have return successors, (13), 5 states have call predecessors, (13), 5 states have call successors, (13) [2022-11-16 11:18:26,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 148 transitions. [2022-11-16 11:18:26,126 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 148 transitions. Word has length 49 [2022-11-16 11:18:26,127 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:18:26,127 INFO L495 AbstractCegarLoop]: Abstraction has 106 states and 148 transitions. [2022-11-16 11:18:26,127 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.4285714285714284) internal successors, (34), 12 states have internal predecessors, (34), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-16 11:18:26,127 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 148 transitions. [2022-11-16 11:18:26,129 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-11-16 11:18:26,129 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:18:26,130 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:18:26,130 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-11-16 11:18:26,130 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 11:18:26,131 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:18:26,131 INFO L85 PathProgramCache]: Analyzing trace with hash -1569533394, now seen corresponding path program 1 times [2022-11-16 11:18:26,131 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:18:26,132 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1074166922] [2022-11-16 11:18:26,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:18:26,132 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:18:26,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:18:28,078 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-11-16 11:18:28,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:18:29,590 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2022-11-16 11:18:29,590 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:18:29,590 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1074166922] [2022-11-16 11:18:29,591 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1074166922] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 11:18:29,591 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1511128193] [2022-11-16 11:18:29,591 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:18:29,591 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:18:29,591 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77673219-29ef-4342-9b9b-2253604e6a6d/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:18:29,596 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77673219-29ef-4342-9b9b-2253604e6a6d/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:18:29,623 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77673219-29ef-4342-9b9b-2253604e6a6d/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-16 11:18:29,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:18:29,814 INFO L263 TraceCheckSpWp]: Trace formula consists of 331 conjuncts, 107 conjunts are in the unsatisfiable core [2022-11-16 11:18:29,822 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:18:29,884 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-16 11:18:30,998 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-16 11:18:31,427 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:18:31,428 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 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 [2022-11-16 11:18:31,440 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:18:31,454 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-16 11:18:31,455 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 58 treesize of output 53 [2022-11-16 11:18:31,685 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-16 11:18:31,686 INFO L350 Elim1Store]: Elim1 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 3 new quantified variables, introduced 2 case distinctions, treesize of input 69 treesize of output 54 [2022-11-16 11:18:31,715 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 18 [2022-11-16 11:18:32,057 INFO L321 Elim1Store]: treesize reduction 56, result has 45.1 percent of original size [2022-11-16 11:18:32,057 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 76 treesize of output 88 [2022-11-16 11:18:32,272 INFO L321 Elim1Store]: treesize reduction 72, result has 24.2 percent of original size [2022-11-16 11:18:32,273 INFO L350 Elim1Store]: Elim1 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 34 treesize of output 36 [2022-11-16 11:18:33,019 INFO L321 Elim1Store]: treesize reduction 130, result has 58.5 percent of original size [2022-11-16 11:18:33,019 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 1 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 21 case distinctions, treesize of input 1235 treesize of output 1349 [2022-11-16 11:18:33,563 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:18:33,570 INFO L321 Elim1Store]: treesize reduction 14, result has 17.6 percent of original size [2022-11-16 11:18:33,571 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 64 treesize of output 34 [2022-11-16 11:18:33,705 INFO L321 Elim1Store]: treesize reduction 12, result has 52.0 percent of original size [2022-11-16 11:18:33,706 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 99 treesize of output 45 [2022-11-16 11:18:33,713 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 23 refuted. 1 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-16 11:18:33,714 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:18:34,824 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 11:18:34,828 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 11:18:34,830 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 16181 treesize of output 15573 [2022-11-16 11:18:36,180 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1511128193] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 11:18:36,180 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 11:18:36,181 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 19] total 34 [2022-11-16 11:18:36,181 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [683081367] [2022-11-16 11:18:36,181 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 11:18:36,181 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-11-16 11:18:36,181 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:18:36,182 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-11-16 11:18:36,182 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=1314, Unknown=2, NotChecked=0, Total=1406 [2022-11-16 11:18:36,183 INFO L87 Difference]: Start difference. First operand 106 states and 148 transitions. Second operand has 34 states, 34 states have (on average 2.1470588235294117) internal successors, (73), 30 states have internal predecessors, (73), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-16 11:18:40,377 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:18:40,377 INFO L93 Difference]: Finished difference Result 241 states and 387 transitions. [2022-11-16 11:18:40,378 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-11-16 11:18:40,378 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 2.1470588235294117) internal successors, (73), 30 states have internal predecessors, (73), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 50 [2022-11-16 11:18:40,379 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:18:40,381 INFO L225 Difference]: With dead ends: 241 [2022-11-16 11:18:40,381 INFO L226 Difference]: Without dead ends: 211 [2022-11-16 11:18:40,384 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 511 ImplicationChecksByTransitivity, 5.9s TimeCoverageRelationStatistics Valid=241, Invalid=3539, Unknown=2, NotChecked=0, Total=3782 [2022-11-16 11:18:40,385 INFO L413 NwaCegarLoop]: 56 mSDtfsCounter, 89 mSDsluCounter, 1318 mSDsCounter, 0 mSdLazyCounter, 663 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 89 SdHoareTripleChecker+Valid, 1374 SdHoareTripleChecker+Invalid, 1532 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 663 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 837 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-11-16 11:18:40,385 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [89 Valid, 1374 Invalid, 1532 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 663 Invalid, 0 Unknown, 837 Unchecked, 0.9s Time] [2022-11-16 11:18:40,386 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 211 states. [2022-11-16 11:18:40,433 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 211 to 187. [2022-11-16 11:18:40,434 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 187 states, 164 states have (on average 1.3231707317073171) internal successors, (217), 173 states have internal predecessors, (217), 16 states have call successors, (16), 1 states have call predecessors, (16), 6 states have return successors, (84), 12 states have call predecessors, (84), 16 states have call successors, (84) [2022-11-16 11:18:40,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 187 states to 187 states and 317 transitions. [2022-11-16 11:18:40,436 INFO L78 Accepts]: Start accepts. Automaton has 187 states and 317 transitions. Word has length 50 [2022-11-16 11:18:40,436 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:18:40,437 INFO L495 AbstractCegarLoop]: Abstraction has 187 states and 317 transitions. [2022-11-16 11:18:40,437 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 2.1470588235294117) internal successors, (73), 30 states have internal predecessors, (73), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-16 11:18:40,437 INFO L276 IsEmpty]: Start isEmpty. Operand 187 states and 317 transitions. [2022-11-16 11:18:40,440 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-11-16 11:18:40,440 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:18:40,440 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:18:40,453 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77673219-29ef-4342-9b9b-2253604e6a6d/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-16 11:18:40,647 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77673219-29ef-4342-9b9b-2253604e6a6d/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:18:40,648 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 11:18:40,649 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:18:40,649 INFO L85 PathProgramCache]: Analyzing trace with hash 982640294, now seen corresponding path program 2 times [2022-11-16 11:18:40,649 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:18:40,649 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1268639347] [2022-11-16 11:18:40,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:18:40,649 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:18:40,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:18:42,794 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-11-16 11:18:42,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:18:45,077 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-11-16 11:18:45,078 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:18:45,078 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1268639347] [2022-11-16 11:18:45,078 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1268639347] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 11:18:45,078 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1021985574] [2022-11-16 11:18:45,078 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-16 11:18:45,078 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:18:45,079 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77673219-29ef-4342-9b9b-2253604e6a6d/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:18:45,080 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77673219-29ef-4342-9b9b-2253604e6a6d/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:18:45,105 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77673219-29ef-4342-9b9b-2253604e6a6d/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-16 11:18:45,311 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-16 11:18:45,312 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 11:18:45,317 INFO L263 TraceCheckSpWp]: Trace formula consists of 338 conjuncts, 127 conjunts are in the unsatisfiable core [2022-11-16 11:18:45,325 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:18:45,336 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-16 11:18:45,993 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-16 11:18:46,338 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-16 11:18:46,359 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-16 11:18:46,359 INFO L350 Elim1Store]: Elim1 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 1 case distinctions, treesize of input 53 treesize of output 44 [2022-11-16 11:18:46,730 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:18:46,756 INFO L321 Elim1Store]: treesize reduction 40, result has 27.3 percent of original size [2022-11-16 11:18:46,756 INFO L350 Elim1Store]: Elim1 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 3 new quantified variables, introduced 3 case distinctions, treesize of input 86 treesize of output 67 [2022-11-16 11:18:46,766 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:18:46,768 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:18:46,769 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 33 [2022-11-16 11:18:46,968 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:18:46,970 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 35 [2022-11-16 11:18:47,011 INFO L321 Elim1Store]: treesize reduction 40, result has 27.3 percent of original size [2022-11-16 11:18:47,012 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 5 case distinctions, treesize of input 120 treesize of output 75 [2022-11-16 11:18:47,344 INFO L321 Elim1Store]: treesize reduction 131, result has 33.5 percent of original size [2022-11-16 11:18:47,344 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 7 new quantified variables, introduced 13 case distinctions, treesize of input 134 treesize of output 125 [2022-11-16 11:18:47,376 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:18:47,434 INFO L321 Elim1Store]: treesize reduction 96, result has 23.8 percent of original size [2022-11-16 11:18:47,435 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 41 treesize of output 46 [2022-11-16 11:18:47,886 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:18:47,891 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:18:47,896 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:18:47,899 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:18:47,902 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:18:47,913 INFO L321 Elim1Store]: treesize reduction 33, result has 19.5 percent of original size [2022-11-16 11:18:47,914 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 129 treesize of output 105 [2022-11-16 11:18:48,562 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:18:48,563 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:18:48,584 INFO L321 Elim1Store]: treesize reduction 90, result has 7.2 percent of original size [2022-11-16 11:18:48,585 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 4 disjoint index pairs (out of 15 index pairs), introduced 9 new quantified variables, introduced 7 case distinctions, treesize of input 115 treesize of output 60 [2022-11-16 11:18:48,759 INFO L321 Elim1Store]: treesize reduction 32, result has 34.7 percent of original size [2022-11-16 11:18:48,759 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 8 new quantified variables, introduced 10 case distinctions, treesize of input 151 treesize of output 56 [2022-11-16 11:18:48,770 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-11-16 11:18:48,770 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:18:50,750 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 11:18:50,751 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 11:18:50,790 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 11:18:50,824 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 11:18:50,825 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 11:18:50,825 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 11:18:51,011 INFO L321 Elim1Store]: treesize reduction 5280, result has 0.0 percent of original size [2022-11-16 11:18:51,013 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 10 select indices, 10 select index equivalence classes, 4 disjoint index pairs (out of 45 index pairs), introduced 12 new quantified variables, introduced 33 case distinctions, treesize of input 165930654 treesize of output 1