./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-tiling/pr2.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 5e519f3a Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa3dd297-0d87-4a2f-b1c7-72d0de936b5d/bin/uautomizer-Dbtcem3rbc/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa3dd297-0d87-4a2f-b1c7-72d0de936b5d/bin/uautomizer-Dbtcem3rbc/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa3dd297-0d87-4a2f-b1c7-72d0de936b5d/bin/uautomizer-Dbtcem3rbc/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa3dd297-0d87-4a2f-b1c7-72d0de936b5d/bin/uautomizer-Dbtcem3rbc/config/AutomizerReach.xml -i ../../sv-benchmarks/c/array-tiling/pr2.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa3dd297-0d87-4a2f-b1c7-72d0de936b5d/bin/uautomizer-Dbtcem3rbc/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa3dd297-0d87-4a2f-b1c7-72d0de936b5d/bin/uautomizer-Dbtcem3rbc --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 5922a5be589e27d89439744489152c928c7510f0140c8b0fb4d1faadee969752 --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-5e519f3 [2022-11-02 20:24:27,431 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-02 20:24:27,434 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-02 20:24:27,472 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-02 20:24:27,473 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-02 20:24:27,477 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-02 20:24:27,479 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-02 20:24:27,483 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-02 20:24:27,485 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-02 20:24:27,491 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-02 20:24:27,492 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-02 20:24:27,495 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-02 20:24:27,495 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-02 20:24:27,498 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-02 20:24:27,500 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-02 20:24:27,502 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-02 20:24:27,503 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-02 20:24:27,504 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-02 20:24:27,506 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-02 20:24:27,513 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-02 20:24:27,515 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-02 20:24:27,516 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-02 20:24:27,519 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-02 20:24:27,520 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-02 20:24:27,529 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-02 20:24:27,529 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-02 20:24:27,530 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-02 20:24:27,531 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-02 20:24:27,532 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-02 20:24:27,533 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-02 20:24:27,534 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-02 20:24:27,535 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-02 20:24:27,537 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-02 20:24:27,538 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-02 20:24:27,541 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-02 20:24:27,541 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-02 20:24:27,542 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-02 20:24:27,542 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-02 20:24:27,542 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-02 20:24:27,543 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-02 20:24:27,544 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-02 20:24:27,545 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa3dd297-0d87-4a2f-b1c7-72d0de936b5d/bin/uautomizer-Dbtcem3rbc/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-11-02 20:24:27,585 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-02 20:24:27,585 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-02 20:24:27,586 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-02 20:24:27,586 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-02 20:24:27,587 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-02 20:24:27,587 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-02 20:24:27,588 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-02 20:24:27,588 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-02 20:24:27,589 INFO L138 SettingsManager]: * Use SBE=true [2022-11-02 20:24:27,589 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-02 20:24:27,590 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-02 20:24:27,590 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-02 20:24:27,590 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-02 20:24:27,591 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-02 20:24:27,591 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-02 20:24:27,591 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-02 20:24:27,591 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-02 20:24:27,591 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-02 20:24:27,592 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-02 20:24:27,592 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-02 20:24:27,592 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-02 20:24:27,592 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-02 20:24:27,592 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-02 20:24:27,593 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-02 20:24:27,593 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-02 20:24:27,593 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-02 20:24:27,593 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-02 20:24:27,594 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-02 20:24:27,594 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-02 20:24:27,594 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-02 20:24:27,594 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-11-02 20:24:27,594 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-11-02 20:24:27,595 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-02 20:24:27,595 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_fa3dd297-0d87-4a2f-b1c7-72d0de936b5d/bin/uautomizer-Dbtcem3rbc/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa3dd297-0d87-4a2f-b1c7-72d0de936b5d/bin/uautomizer-Dbtcem3rbc Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 5922a5be589e27d89439744489152c928c7510f0140c8b0fb4d1faadee969752 [2022-11-02 20:24:27,846 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-02 20:24:27,867 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-02 20:24:27,870 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-02 20:24:27,872 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-02 20:24:27,873 INFO L275 PluginConnector]: CDTParser initialized [2022-11-02 20:24:27,874 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa3dd297-0d87-4a2f-b1c7-72d0de936b5d/bin/uautomizer-Dbtcem3rbc/../../sv-benchmarks/c/array-tiling/pr2.c [2022-11-02 20:24:27,954 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa3dd297-0d87-4a2f-b1c7-72d0de936b5d/bin/uautomizer-Dbtcem3rbc/data/5d02d6c6b/740ffe6e2faf48b9bf4338107f4a7b4c/FLAG73311a29b [2022-11-02 20:24:28,558 INFO L306 CDTParser]: Found 1 translation units. [2022-11-02 20:24:28,559 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa3dd297-0d87-4a2f-b1c7-72d0de936b5d/sv-benchmarks/c/array-tiling/pr2.c [2022-11-02 20:24:28,570 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa3dd297-0d87-4a2f-b1c7-72d0de936b5d/bin/uautomizer-Dbtcem3rbc/data/5d02d6c6b/740ffe6e2faf48b9bf4338107f4a7b4c/FLAG73311a29b [2022-11-02 20:24:28,919 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa3dd297-0d87-4a2f-b1c7-72d0de936b5d/bin/uautomizer-Dbtcem3rbc/data/5d02d6c6b/740ffe6e2faf48b9bf4338107f4a7b4c [2022-11-02 20:24:28,923 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-02 20:24:28,925 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-02 20:24:28,931 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-02 20:24:28,931 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-02 20:24:28,939 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-02 20:24:28,940 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.11 08:24:28" (1/1) ... [2022-11-02 20:24:28,941 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@74b13994 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:24:28, skipping insertion in model container [2022-11-02 20:24:28,941 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.11 08:24:28" (1/1) ... [2022-11-02 20:24:28,951 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-02 20:24:28,978 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-02 20:24:29,160 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa3dd297-0d87-4a2f-b1c7-72d0de936b5d/sv-benchmarks/c/array-tiling/pr2.c[394,407] [2022-11-02 20:24:29,183 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-02 20:24:29,191 INFO L203 MainTranslator]: Completed pre-run [2022-11-02 20:24:29,205 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa3dd297-0d87-4a2f-b1c7-72d0de936b5d/sv-benchmarks/c/array-tiling/pr2.c[394,407] [2022-11-02 20:24:29,214 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-02 20:24:29,232 INFO L208 MainTranslator]: Completed translation [2022-11-02 20:24:29,233 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:24:29 WrapperNode [2022-11-02 20:24:29,233 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-02 20:24:29,234 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-02 20:24:29,234 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-02 20:24:29,235 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-02 20:24:29,244 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:24:29" (1/1) ... [2022-11-02 20:24:29,253 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:24:29" (1/1) ... [2022-11-02 20:24:29,278 INFO L138 Inliner]: procedures = 15, calls = 24, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 75 [2022-11-02 20:24:29,279 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-02 20:24:29,280 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-02 20:24:29,280 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-02 20:24:29,280 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-02 20:24:29,290 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:24:29" (1/1) ... [2022-11-02 20:24:29,290 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:24:29" (1/1) ... [2022-11-02 20:24:29,293 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:24:29" (1/1) ... [2022-11-02 20:24:29,293 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:24:29" (1/1) ... [2022-11-02 20:24:29,299 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:24:29" (1/1) ... [2022-11-02 20:24:29,304 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:24:29" (1/1) ... [2022-11-02 20:24:29,306 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:24:29" (1/1) ... [2022-11-02 20:24:29,307 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:24:29" (1/1) ... [2022-11-02 20:24:29,310 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-02 20:24:29,311 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-02 20:24:29,311 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-02 20:24:29,311 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-02 20:24:29,312 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:24:29" (1/1) ... [2022-11-02 20:24:29,323 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-02 20:24:29,335 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa3dd297-0d87-4a2f-b1c7-72d0de936b5d/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:24:29,349 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa3dd297-0d87-4a2f-b1c7-72d0de936b5d/bin/uautomizer-Dbtcem3rbc/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-02 20:24:29,352 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa3dd297-0d87-4a2f-b1c7-72d0de936b5d/bin/uautomizer-Dbtcem3rbc/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-02 20:24:29,405 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-02 20:24:29,406 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-02 20:24:29,406 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-02 20:24:29,406 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-02 20:24:29,406 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-02 20:24:29,406 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-02 20:24:29,407 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-02 20:24:29,407 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-02 20:24:29,493 INFO L235 CfgBuilder]: Building ICFG [2022-11-02 20:24:29,496 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-02 20:24:29,830 INFO L276 CfgBuilder]: Performing block encoding [2022-11-02 20:24:29,837 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-02 20:24:29,837 INFO L300 CfgBuilder]: Removed 2 assume(true) statements. [2022-11-02 20:24:29,840 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.11 08:24:29 BoogieIcfgContainer [2022-11-02 20:24:29,840 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-02 20:24:29,843 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-02 20:24:29,843 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-02 20:24:29,848 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-02 20:24:29,848 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.11 08:24:28" (1/3) ... [2022-11-02 20:24:29,849 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3bdae477 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.11 08:24:29, skipping insertion in model container [2022-11-02 20:24:29,850 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:24:29" (2/3) ... [2022-11-02 20:24:29,850 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3bdae477 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.11 08:24:29, skipping insertion in model container [2022-11-02 20:24:29,851 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.11 08:24:29" (3/3) ... [2022-11-02 20:24:29,852 INFO L112 eAbstractionObserver]: Analyzing ICFG pr2.c [2022-11-02 20:24:29,878 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-02 20:24:29,878 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-02 20:24:29,943 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-02 20:24:29,952 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;@1fe88a75, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-02 20:24:29,953 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-02 20:24:29,958 INFO L276 IsEmpty]: Start isEmpty. Operand has 24 states, 22 states have (on average 1.5454545454545454) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:24:29,967 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-02 20:24:29,967 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:24:29,968 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:24:29,969 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:24:29,976 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:24:29,976 INFO L85 PathProgramCache]: Analyzing trace with hash -583465863, now seen corresponding path program 1 times [2022-11-02 20:24:29,988 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:24:29,989 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1045191100] [2022-11-02 20:24:29,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:24:29,990 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:24:30,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:24:30,304 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:24:30,305 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:24:30,307 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1045191100] [2022-11-02 20:24:30,309 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1045191100] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:24:30,309 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:24:30,310 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-02 20:24:30,313 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2091087740] [2022-11-02 20:24:30,314 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:24:30,321 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-02 20:24:30,323 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:24:30,370 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-02 20:24:30,373 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-02 20:24:30,377 INFO L87 Difference]: Start difference. First operand has 24 states, 22 states have (on average 1.5454545454545454) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 6.5) internal successors, (13), 2 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:24:30,402 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:24:30,403 INFO L93 Difference]: Finished difference Result 43 states and 60 transitions. [2022-11-02 20:24:30,404 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-02 20:24:30,407 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 6.5) internal successors, (13), 2 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2022-11-02 20:24:30,409 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:24:30,421 INFO L225 Difference]: With dead ends: 43 [2022-11-02 20:24:30,421 INFO L226 Difference]: Without dead ends: 19 [2022-11-02 20:24:30,428 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-02 20:24:30,437 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-02 20:24:30,439 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-02 20:24:30,464 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2022-11-02 20:24:30,486 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2022-11-02 20:24:30,489 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 18 states have (on average 1.2777777777777777) internal successors, (23), 18 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:24:30,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 23 transitions. [2022-11-02 20:24:30,493 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 23 transitions. Word has length 13 [2022-11-02 20:24:30,494 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:24:30,494 INFO L495 AbstractCegarLoop]: Abstraction has 19 states and 23 transitions. [2022-11-02 20:24:30,495 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 6.5) internal successors, (13), 2 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:24:30,496 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 23 transitions. [2022-11-02 20:24:30,496 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-02 20:24:30,497 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:24:30,498 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:24:30,499 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-02 20:24:30,499 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:24:30,504 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:24:30,504 INFO L85 PathProgramCache]: Analyzing trace with hash 96592507, now seen corresponding path program 1 times [2022-11-02 20:24:30,505 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:24:30,506 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [938344053] [2022-11-02 20:24:30,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:24:30,507 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:24:30,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:24:30,889 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:24:30,890 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:24:30,890 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [938344053] [2022-11-02 20:24:30,891 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [938344053] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:24:30,891 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:24:30,894 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-02 20:24:30,894 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2121557637] [2022-11-02 20:24:30,895 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:24:30,896 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-02 20:24:30,899 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:24:30,900 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-02 20:24:30,900 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-02 20:24:30,901 INFO L87 Difference]: Start difference. First operand 19 states and 23 transitions. Second operand has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:24:30,982 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:24:30,982 INFO L93 Difference]: Finished difference Result 28 states and 33 transitions. [2022-11-02 20:24:30,982 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-02 20:24:30,983 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2022-11-02 20:24:30,983 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:24:30,984 INFO L225 Difference]: With dead ends: 28 [2022-11-02 20:24:30,984 INFO L226 Difference]: Without dead ends: 26 [2022-11-02 20:24:30,985 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-02 20:24:30,986 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 9 mSDsluCounter, 35 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 59 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-02 20:24:30,987 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 59 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-02 20:24:30,989 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2022-11-02 20:24:30,997 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 21. [2022-11-02 20:24:30,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 20 states have (on average 1.25) internal successors, (25), 20 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:24:30,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 25 transitions. [2022-11-02 20:24:30,998 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 25 transitions. Word has length 13 [2022-11-02 20:24:30,999 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:24:30,999 INFO L495 AbstractCegarLoop]: Abstraction has 21 states and 25 transitions. [2022-11-02 20:24:30,999 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:24:31,000 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 25 transitions. [2022-11-02 20:24:31,000 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-02 20:24:31,000 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:24:31,001 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:24:31,001 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-02 20:24:31,001 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:24:31,002 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:24:31,002 INFO L85 PathProgramCache]: Analyzing trace with hash 96652089, now seen corresponding path program 1 times [2022-11-02 20:24:31,003 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:24:31,003 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [931461573] [2022-11-02 20:24:31,003 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:24:31,003 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:24:31,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:24:31,358 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:24:31,358 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:24:31,359 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [931461573] [2022-11-02 20:24:31,359 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [931461573] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:24:31,359 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:24:31,360 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-02 20:24:31,360 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1222165890] [2022-11-02 20:24:31,360 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:24:31,361 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-02 20:24:31,361 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:24:31,362 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-02 20:24:31,362 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2022-11-02 20:24:31,363 INFO L87 Difference]: Start difference. First operand 21 states and 25 transitions. Second operand has 5 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:24:31,461 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:24:31,462 INFO L93 Difference]: Finished difference Result 36 states and 44 transitions. [2022-11-02 20:24:31,462 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-02 20:24:31,463 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2022-11-02 20:24:31,463 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:24:31,464 INFO L225 Difference]: With dead ends: 36 [2022-11-02 20:24:31,464 INFO L226 Difference]: Without dead ends: 25 [2022-11-02 20:24:31,466 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2022-11-02 20:24:31,473 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 53 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-02 20:24:31,474 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [53 Valid, 21 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-02 20:24:31,475 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2022-11-02 20:24:31,479 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 22. [2022-11-02 20:24:31,480 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 21 states have (on average 1.2380952380952381) internal successors, (26), 21 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:24:31,480 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 26 transitions. [2022-11-02 20:24:31,481 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 26 transitions. Word has length 13 [2022-11-02 20:24:31,481 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:24:31,481 INFO L495 AbstractCegarLoop]: Abstraction has 22 states and 26 transitions. [2022-11-02 20:24:31,482 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:24:31,482 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 26 transitions. [2022-11-02 20:24:31,482 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-11-02 20:24:31,483 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:24:31,483 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:24:31,483 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-02 20:24:31,487 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:24:31,492 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:24:31,492 INFO L85 PathProgramCache]: Analyzing trace with hash 37256114, now seen corresponding path program 1 times [2022-11-02 20:24:31,493 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:24:31,494 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [954785392] [2022-11-02 20:24:31,495 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:24:31,495 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:24:31,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:24:32,257 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:24:32,258 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:24:32,258 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [954785392] [2022-11-02 20:24:32,258 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [954785392] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:24:32,259 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [917429941] [2022-11-02 20:24:32,259 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:24:32,259 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:24:32,260 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa3dd297-0d87-4a2f-b1c7-72d0de936b5d/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:24:32,262 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa3dd297-0d87-4a2f-b1c7-72d0de936b5d/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:24:32,269 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa3dd297-0d87-4a2f-b1c7-72d0de936b5d/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-02 20:24:32,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:24:32,363 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-02 20:24:32,372 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:24:32,530 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-02 20:24:32,576 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-02 20:24:32,578 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2022-11-02 20:24:32,670 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-02 20:24:32,699 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:24:32,699 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:24:32,833 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 15 [2022-11-02 20:24:32,839 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 18 [2022-11-02 20:24:32,864 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:24:32,864 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [917429941] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:24:32,865 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 20:24:32,865 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 6] total 18 [2022-11-02 20:24:32,865 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2048779322] [2022-11-02 20:24:32,865 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 20:24:32,866 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-11-02 20:24:32,866 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:24:32,867 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-11-02 20:24:32,868 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=238, Unknown=0, NotChecked=0, Total=306 [2022-11-02 20:24:32,868 INFO L87 Difference]: Start difference. First operand 22 states and 26 transitions. Second operand has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 18 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:24:33,823 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:24:33,823 INFO L93 Difference]: Finished difference Result 111 states and 134 transitions. [2022-11-02 20:24:33,823 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-11-02 20:24:33,824 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 18 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-11-02 20:24:33,824 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:24:33,825 INFO L225 Difference]: With dead ends: 111 [2022-11-02 20:24:33,825 INFO L226 Difference]: Without dead ends: 96 [2022-11-02 20:24:33,827 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 190 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=276, Invalid=846, Unknown=0, NotChecked=0, Total=1122 [2022-11-02 20:24:33,828 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 268 mSDsluCounter, 114 mSDsCounter, 0 mSdLazyCounter, 216 mSolverCounterSat, 60 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 268 SdHoareTripleChecker+Valid, 132 SdHoareTripleChecker+Invalid, 276 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 60 IncrementalHoareTripleChecker+Valid, 216 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-02 20:24:33,829 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [268 Valid, 132 Invalid, 276 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [60 Valid, 216 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-02 20:24:33,830 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2022-11-02 20:24:33,841 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 35. [2022-11-02 20:24:33,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 34 states have (on average 1.3235294117647058) internal successors, (45), 34 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:24:33,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 45 transitions. [2022-11-02 20:24:33,843 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 45 transitions. Word has length 17 [2022-11-02 20:24:33,843 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:24:33,843 INFO L495 AbstractCegarLoop]: Abstraction has 35 states and 45 transitions. [2022-11-02 20:24:33,844 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 18 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:24:33,844 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 45 transitions. [2022-11-02 20:24:33,845 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-11-02 20:24:33,845 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:24:33,845 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:24:33,882 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa3dd297-0d87-4a2f-b1c7-72d0de936b5d/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-11-02 20:24:34,069 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa3dd297-0d87-4a2f-b1c7-72d0de936b5d/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:24:34,069 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:24:34,070 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:24:34,070 INFO L85 PathProgramCache]: Analyzing trace with hash -355770896, now seen corresponding path program 1 times [2022-11-02 20:24:34,071 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:24:34,072 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1540035640] [2022-11-02 20:24:34,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:24:34,073 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:24:34,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:24:34,164 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:24:34,165 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:24:34,165 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1540035640] [2022-11-02 20:24:34,165 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1540035640] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:24:34,166 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:24:34,166 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-02 20:24:34,166 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2043377939] [2022-11-02 20:24:34,167 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:24:34,167 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-02 20:24:34,168 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:24:34,168 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-02 20:24:34,169 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-02 20:24:34,169 INFO L87 Difference]: Start difference. First operand 35 states and 45 transitions. Second operand has 4 states, 4 states have (on average 4.25) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:24:34,210 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:24:34,211 INFO L93 Difference]: Finished difference Result 60 states and 75 transitions. [2022-11-02 20:24:34,212 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-02 20:24:34,212 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.25) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-11-02 20:24:34,212 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:24:34,213 INFO L225 Difference]: With dead ends: 60 [2022-11-02 20:24:34,213 INFO L226 Difference]: Without dead ends: 45 [2022-11-02 20:24:34,214 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-02 20:24:34,215 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 33 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-02 20:24:34,216 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [33 Valid, 45 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-02 20:24:34,217 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2022-11-02 20:24:34,225 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 35. [2022-11-02 20:24:34,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 34 states have (on average 1.2647058823529411) internal successors, (43), 34 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:24:34,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 43 transitions. [2022-11-02 20:24:34,227 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 43 transitions. Word has length 17 [2022-11-02 20:24:34,227 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:24:34,227 INFO L495 AbstractCegarLoop]: Abstraction has 35 states and 43 transitions. [2022-11-02 20:24:34,228 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.25) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:24:34,228 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 43 transitions. [2022-11-02 20:24:34,229 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-11-02 20:24:34,229 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:24:34,229 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:24:34,229 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-02 20:24:34,230 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:24:34,230 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:24:34,231 INFO L85 PathProgramCache]: Analyzing trace with hash 324287474, now seen corresponding path program 1 times [2022-11-02 20:24:34,231 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:24:34,231 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [344460532] [2022-11-02 20:24:34,231 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:24:34,232 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:24:34,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:24:34,549 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:24:34,549 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:24:34,550 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [344460532] [2022-11-02 20:24:34,550 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [344460532] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:24:34,550 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1117677894] [2022-11-02 20:24:34,550 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:24:34,550 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:24:34,551 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa3dd297-0d87-4a2f-b1c7-72d0de936b5d/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:24:34,553 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa3dd297-0d87-4a2f-b1c7-72d0de936b5d/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:24:34,566 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa3dd297-0d87-4a2f-b1c7-72d0de936b5d/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-02 20:24:34,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:24:34,616 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-02 20:24:34,618 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:24:34,650 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-02 20:24:34,666 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-02 20:24:34,677 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2022-11-02 20:24:34,768 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:24:34,769 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:24:34,868 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2022-11-02 20:24:34,871 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 16 [2022-11-02 20:24:34,888 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:24:34,889 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1117677894] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:24:34,889 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 20:24:34,889 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 7] total 14 [2022-11-02 20:24:34,889 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1697113004] [2022-11-02 20:24:34,889 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 20:24:34,890 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-11-02 20:24:34,890 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:24:34,890 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-11-02 20:24:34,891 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2022-11-02 20:24:34,891 INFO L87 Difference]: Start difference. First operand 35 states and 43 transitions. Second operand has 14 states, 14 states have (on average 2.5714285714285716) internal successors, (36), 14 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:24:35,338 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:24:35,338 INFO L93 Difference]: Finished difference Result 92 states and 107 transitions. [2022-11-02 20:24:35,338 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-11-02 20:24:35,339 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.5714285714285716) internal successors, (36), 14 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-11-02 20:24:35,340 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:24:35,343 INFO L225 Difference]: With dead ends: 92 [2022-11-02 20:24:35,343 INFO L226 Difference]: Without dead ends: 90 [2022-11-02 20:24:35,344 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 27 SyntacticMatches, 3 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 212 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=229, Invalid=701, Unknown=0, NotChecked=0, Total=930 [2022-11-02 20:24:35,346 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 122 mSDsluCounter, 107 mSDsCounter, 0 mSdLazyCounter, 254 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 122 SdHoareTripleChecker+Valid, 130 SdHoareTripleChecker+Invalid, 276 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 254 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-02 20:24:35,347 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [122 Valid, 130 Invalid, 276 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 254 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-02 20:24:35,348 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2022-11-02 20:24:35,365 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 42. [2022-11-02 20:24:35,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 41 states have (on average 1.2682926829268293) internal successors, (52), 41 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:24:35,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 52 transitions. [2022-11-02 20:24:35,366 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 52 transitions. Word has length 17 [2022-11-02 20:24:35,366 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:24:35,366 INFO L495 AbstractCegarLoop]: Abstraction has 42 states and 52 transitions. [2022-11-02 20:24:35,367 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.5714285714285716) internal successors, (36), 14 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:24:35,367 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 52 transitions. [2022-11-02 20:24:35,367 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-11-02 20:24:35,367 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:24:35,368 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:24:35,411 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa3dd297-0d87-4a2f-b1c7-72d0de936b5d/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-02 20:24:35,593 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa3dd297-0d87-4a2f-b1c7-72d0de936b5d/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:24:35,593 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:24:35,593 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:24:35,593 INFO L85 PathProgramCache]: Analyzing trace with hash 1629557997, now seen corresponding path program 1 times [2022-11-02 20:24:35,594 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:24:35,594 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [710300583] [2022-11-02 20:24:35,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:24:35,594 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:24:35,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:24:35,627 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:24:35,627 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:24:35,628 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [710300583] [2022-11-02 20:24:35,628 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [710300583] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:24:35,628 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:24:35,628 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-02 20:24:35,629 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [702447232] [2022-11-02 20:24:35,629 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:24:35,630 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-02 20:24:35,634 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:24:35,634 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-02 20:24:35,635 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-02 20:24:35,635 INFO L87 Difference]: Start difference. First operand 42 states and 52 transitions. Second operand has 3 states, 3 states have (on average 7.0) internal successors, (21), 3 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:24:35,660 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:24:35,660 INFO L93 Difference]: Finished difference Result 62 states and 74 transitions. [2022-11-02 20:24:35,660 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-02 20:24:35,661 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 7.0) internal successors, (21), 3 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-11-02 20:24:35,661 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:24:35,662 INFO L225 Difference]: With dead ends: 62 [2022-11-02 20:24:35,662 INFO L226 Difference]: Without dead ends: 47 [2022-11-02 20:24:35,662 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-02 20:24:35,663 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 12 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-02 20:24:35,666 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 38 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-02 20:24:35,668 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2022-11-02 20:24:35,675 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 37. [2022-11-02 20:24:35,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 36 states have (on average 1.25) internal successors, (45), 36 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:24:35,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 45 transitions. [2022-11-02 20:24:35,681 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 45 transitions. Word has length 21 [2022-11-02 20:24:35,683 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:24:35,683 INFO L495 AbstractCegarLoop]: Abstraction has 37 states and 45 transitions. [2022-11-02 20:24:35,683 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 7.0) internal successors, (21), 3 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:24:35,684 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 45 transitions. [2022-11-02 20:24:35,684 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-11-02 20:24:35,685 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:24:35,685 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:24:35,685 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-11-02 20:24:35,685 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:24:35,688 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:24:35,688 INFO L85 PathProgramCache]: Analyzing trace with hash 2125491333, now seen corresponding path program 1 times [2022-11-02 20:24:35,689 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:24:35,689 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [221897710] [2022-11-02 20:24:35,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:24:35,689 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:24:35,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:24:36,076 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:24:36,079 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:24:36,080 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [221897710] [2022-11-02 20:24:36,080 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [221897710] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:24:36,080 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1279002263] [2022-11-02 20:24:36,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:24:36,080 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:24:36,081 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa3dd297-0d87-4a2f-b1c7-72d0de936b5d/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:24:36,082 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa3dd297-0d87-4a2f-b1c7-72d0de936b5d/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:24:36,105 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa3dd297-0d87-4a2f-b1c7-72d0de936b5d/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-02 20:24:36,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:24:36,154 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-02 20:24:36,162 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:24:36,223 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-02 20:24:36,339 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-02 20:24:36,351 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:24:36,351 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:24:36,426 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 17 [2022-11-02 20:24:36,437 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 18 [2022-11-02 20:24:36,456 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:24:36,456 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1279002263] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:24:36,456 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 20:24:36,456 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 18 [2022-11-02 20:24:36,457 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2013850703] [2022-11-02 20:24:36,457 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 20:24:36,457 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-11-02 20:24:36,457 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:24:36,458 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-11-02 20:24:36,458 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=235, Unknown=0, NotChecked=0, Total=306 [2022-11-02 20:24:36,459 INFO L87 Difference]: Start difference. First operand 37 states and 45 transitions. Second operand has 18 states, 18 states have (on average 3.2222222222222223) internal successors, (58), 18 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:24:36,728 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:24:36,728 INFO L93 Difference]: Finished difference Result 78 states and 89 transitions. [2022-11-02 20:24:36,728 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-02 20:24:36,729 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.2222222222222223) internal successors, (58), 18 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-11-02 20:24:36,729 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:24:36,729 INFO L225 Difference]: With dead ends: 78 [2022-11-02 20:24:36,729 INFO L226 Difference]: Without dead ends: 68 [2022-11-02 20:24:36,730 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 36 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 115 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=155, Invalid=445, Unknown=0, NotChecked=0, Total=600 [2022-11-02 20:24:36,730 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 145 mSDsluCounter, 81 mSDsCounter, 0 mSdLazyCounter, 143 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 145 SdHoareTripleChecker+Valid, 99 SdHoareTripleChecker+Invalid, 168 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 143 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-02 20:24:36,731 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [145 Valid, 99 Invalid, 168 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 143 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-02 20:24:36,731 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2022-11-02 20:24:36,737 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 44. [2022-11-02 20:24:36,738 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 43 states have (on average 1.2093023255813953) internal successors, (52), 43 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:24:36,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 52 transitions. [2022-11-02 20:24:36,738 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 52 transitions. Word has length 23 [2022-11-02 20:24:36,739 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:24:36,739 INFO L495 AbstractCegarLoop]: Abstraction has 44 states and 52 transitions. [2022-11-02 20:24:36,739 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 3.2222222222222223) internal successors, (58), 18 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:24:36,739 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 52 transitions. [2022-11-02 20:24:36,740 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-11-02 20:24:36,740 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:24:36,740 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:24:36,779 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa3dd297-0d87-4a2f-b1c7-72d0de936b5d/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-02 20:24:36,953 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa3dd297-0d87-4a2f-b1c7-72d0de936b5d/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2022-11-02 20:24:36,953 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:24:36,953 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:24:36,953 INFO L85 PathProgramCache]: Analyzing trace with hash 845627655, now seen corresponding path program 1 times [2022-11-02 20:24:36,953 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:24:36,953 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1763447676] [2022-11-02 20:24:36,954 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:24:36,954 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:24:36,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:24:37,351 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:24:37,351 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:24:37,351 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1763447676] [2022-11-02 20:24:37,352 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1763447676] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:24:37,352 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1650822455] [2022-11-02 20:24:37,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:24:37,352 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:24:37,352 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa3dd297-0d87-4a2f-b1c7-72d0de936b5d/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:24:37,353 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa3dd297-0d87-4a2f-b1c7-72d0de936b5d/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:24:37,355 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa3dd297-0d87-4a2f-b1c7-72d0de936b5d/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-02 20:24:37,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:24:37,416 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-02 20:24:37,419 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:24:37,441 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-02 20:24:37,533 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:24:37,533 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:24:37,615 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 15 [2022-11-02 20:24:37,619 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2022-11-02 20:24:37,636 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:24:37,636 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1650822455] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:24:37,636 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 20:24:37,636 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 8] total 14 [2022-11-02 20:24:37,637 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1749794489] [2022-11-02 20:24:37,637 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 20:24:37,637 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-11-02 20:24:37,637 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:24:37,638 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-11-02 20:24:37,638 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2022-11-02 20:24:37,638 INFO L87 Difference]: Start difference. First operand 44 states and 52 transitions. Second operand has 14 states, 14 states have (on average 3.2142857142857144) internal successors, (45), 14 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:24:38,060 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:24:38,060 INFO L93 Difference]: Finished difference Result 102 states and 117 transitions. [2022-11-02 20:24:38,061 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-11-02 20:24:38,061 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.2142857142857144) internal successors, (45), 14 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-11-02 20:24:38,061 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:24:38,062 INFO L225 Difference]: With dead ends: 102 [2022-11-02 20:24:38,062 INFO L226 Difference]: Without dead ends: 100 [2022-11-02 20:24:38,062 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 38 SyntacticMatches, 4 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 201 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=239, Invalid=691, Unknown=0, NotChecked=0, Total=930 [2022-11-02 20:24:38,063 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 104 mSDsluCounter, 111 mSDsCounter, 0 mSdLazyCounter, 237 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 104 SdHoareTripleChecker+Valid, 134 SdHoareTripleChecker+Invalid, 261 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 237 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-02 20:24:38,063 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [104 Valid, 134 Invalid, 261 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 237 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-02 20:24:38,064 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2022-11-02 20:24:38,073 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 57. [2022-11-02 20:24:38,073 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 56 states have (on average 1.2142857142857142) internal successors, (68), 56 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:24:38,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 68 transitions. [2022-11-02 20:24:38,074 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 68 transitions. Word has length 23 [2022-11-02 20:24:38,074 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:24:38,074 INFO L495 AbstractCegarLoop]: Abstraction has 57 states and 68 transitions. [2022-11-02 20:24:38,075 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.2142857142857144) internal successors, (45), 14 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:24:38,075 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 68 transitions. [2022-11-02 20:24:38,075 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-11-02 20:24:38,076 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:24:38,076 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:24:38,115 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa3dd297-0d87-4a2f-b1c7-72d0de936b5d/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-02 20:24:38,289 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa3dd297-0d87-4a2f-b1c7-72d0de936b5d/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:24:38,289 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:24:38,289 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:24:38,289 INFO L85 PathProgramCache]: Analyzing trace with hash 1664572736, now seen corresponding path program 1 times [2022-11-02 20:24:38,289 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:24:38,290 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [553749420] [2022-11-02 20:24:38,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:24:38,290 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:24:38,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:24:38,329 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-02 20:24:38,329 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:24:38,330 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [553749420] [2022-11-02 20:24:38,330 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [553749420] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:24:38,330 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:24:38,330 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-02 20:24:38,330 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2124281120] [2022-11-02 20:24:38,330 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:24:38,331 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-02 20:24:38,331 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:24:38,331 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-02 20:24:38,332 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-02 20:24:38,332 INFO L87 Difference]: Start difference. First operand 57 states and 68 transitions. Second operand has 3 states, 3 states have (on average 8.333333333333334) internal successors, (25), 3 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:24:38,350 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:24:38,351 INFO L93 Difference]: Finished difference Result 80 states and 93 transitions. [2022-11-02 20:24:38,351 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-02 20:24:38,351 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 8.333333333333334) internal successors, (25), 3 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2022-11-02 20:24:38,352 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:24:38,352 INFO L225 Difference]: With dead ends: 80 [2022-11-02 20:24:38,352 INFO L226 Difference]: Without dead ends: 63 [2022-11-02 20:24:38,353 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-02 20:24:38,353 INFO L413 NwaCegarLoop]: 34 mSDtfsCounter, 12 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 10 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-02 20:24:38,355 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 50 Invalid, 10 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-02 20:24:38,355 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2022-11-02 20:24:38,367 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 52. [2022-11-02 20:24:38,368 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 51 states have (on average 1.1764705882352942) internal successors, (60), 51 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:24:38,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 60 transitions. [2022-11-02 20:24:38,369 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 60 transitions. Word has length 27 [2022-11-02 20:24:38,369 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:24:38,369 INFO L495 AbstractCegarLoop]: Abstraction has 52 states and 60 transitions. [2022-11-02 20:24:38,369 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 8.333333333333334) internal successors, (25), 3 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:24:38,369 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 60 transitions. [2022-11-02 20:24:38,370 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-11-02 20:24:38,370 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:24:38,370 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:24:38,370 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-11-02 20:24:38,370 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:24:38,370 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:24:38,371 INFO L85 PathProgramCache]: Analyzing trace with hash -147377384, now seen corresponding path program 2 times [2022-11-02 20:24:38,371 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:24:38,371 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2126692610] [2022-11-02 20:24:38,371 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:24:38,371 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:24:38,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:24:38,684 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 7 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:24:38,685 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:24:38,685 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2126692610] [2022-11-02 20:24:38,685 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2126692610] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:24:38,685 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [502635201] [2022-11-02 20:24:38,685 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-02 20:24:38,686 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:24:38,686 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa3dd297-0d87-4a2f-b1c7-72d0de936b5d/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:24:38,689 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa3dd297-0d87-4a2f-b1c7-72d0de936b5d/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:24:38,708 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa3dd297-0d87-4a2f-b1c7-72d0de936b5d/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-02 20:24:38,753 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-02 20:24:38,753 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-02 20:24:38,754 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-02 20:24:38,755 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:24:39,068 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 14 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:24:39,068 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:24:39,238 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 14 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:24:39,239 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [502635201] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:24:39,239 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 20:24:39,239 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 9] total 25 [2022-11-02 20:24:39,239 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [715836666] [2022-11-02 20:24:39,239 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 20:24:39,240 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-11-02 20:24:39,240 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:24:39,240 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-11-02 20:24:39,241 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=158, Invalid=442, Unknown=0, NotChecked=0, Total=600 [2022-11-02 20:24:39,241 INFO L87 Difference]: Start difference. First operand 52 states and 60 transitions. Second operand has 25 states, 25 states have (on average 3.0) internal successors, (75), 25 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:24:39,522 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:24:39,522 INFO L93 Difference]: Finished difference Result 108 states and 122 transitions. [2022-11-02 20:24:39,523 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-02 20:24:39,523 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 3.0) internal successors, (75), 25 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2022-11-02 20:24:39,523 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:24:39,524 INFO L225 Difference]: With dead ends: 108 [2022-11-02 20:24:39,524 INFO L226 Difference]: Without dead ends: 72 [2022-11-02 20:24:39,524 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 232 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=251, Invalid=619, Unknown=0, NotChecked=0, Total=870 [2022-11-02 20:24:39,525 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 196 mSDsluCounter, 102 mSDsCounter, 0 mSdLazyCounter, 177 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 196 SdHoareTripleChecker+Valid, 118 SdHoareTripleChecker+Invalid, 214 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 177 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-02 20:24:39,525 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [196 Valid, 118 Invalid, 214 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 177 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-02 20:24:39,526 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2022-11-02 20:24:39,536 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 59. [2022-11-02 20:24:39,537 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 58 states have (on average 1.1551724137931034) internal successors, (67), 58 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:24:39,537 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 67 transitions. [2022-11-02 20:24:39,537 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 67 transitions. Word has length 29 [2022-11-02 20:24:39,538 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:24:39,538 INFO L495 AbstractCegarLoop]: Abstraction has 59 states and 67 transitions. [2022-11-02 20:24:39,538 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 3.0) internal successors, (75), 25 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:24:39,538 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 67 transitions. [2022-11-02 20:24:39,542 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-11-02 20:24:39,542 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:24:39,543 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:24:39,579 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa3dd297-0d87-4a2f-b1c7-72d0de936b5d/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-02 20:24:39,765 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa3dd297-0d87-4a2f-b1c7-72d0de936b5d/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:24:39,765 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:24:39,765 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:24:39,765 INFO L85 PathProgramCache]: Analyzing trace with hash 1385615761, now seen corresponding path program 3 times [2022-11-02 20:24:39,766 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:24:39,766 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1092341209] [2022-11-02 20:24:39,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:24:39,766 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:24:39,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:24:40,223 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 4 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:24:40,223 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:24:40,223 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1092341209] [2022-11-02 20:24:40,224 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1092341209] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:24:40,224 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [648298513] [2022-11-02 20:24:40,224 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-02 20:24:40,224 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:24:40,224 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa3dd297-0d87-4a2f-b1c7-72d0de936b5d/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:24:40,229 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa3dd297-0d87-4a2f-b1c7-72d0de936b5d/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:24:40,255 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa3dd297-0d87-4a2f-b1c7-72d0de936b5d/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-02 20:24:40,319 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-11-02 20:24:40,319 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-02 20:24:40,321 INFO L263 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 27 conjunts are in the unsatisfiable core [2022-11-02 20:24:40,323 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:24:40,425 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-02 20:24:40,463 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2022-11-02 20:24:40,707 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 4 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:24:40,708 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:24:40,990 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 49 [2022-11-02 20:24:40,996 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 123 treesize of output 115 [2022-11-02 20:24:41,249 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:24:41,249 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [648298513] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:24:41,249 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 20:24:41,249 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11, 13] total 32 [2022-11-02 20:24:41,250 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [579710218] [2022-11-02 20:24:41,251 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 20:24:41,251 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-11-02 20:24:41,251 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:24:41,252 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-11-02 20:24:41,252 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=866, Unknown=0, NotChecked=0, Total=992 [2022-11-02 20:24:41,253 INFO L87 Difference]: Start difference. First operand 59 states and 67 transitions. Second operand has 32 states, 32 states have (on average 2.84375) internal successors, (91), 32 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:24:43,662 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:24:43,662 INFO L93 Difference]: Finished difference Result 153 states and 173 transitions. [2022-11-02 20:24:43,662 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2022-11-02 20:24:43,662 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.84375) internal successors, (91), 32 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-11-02 20:24:43,663 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:24:43,663 INFO L225 Difference]: With dead ends: 153 [2022-11-02 20:24:43,663 INFO L226 Difference]: Without dead ends: 143 [2022-11-02 20:24:43,665 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 48 SyntacticMatches, 8 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1543 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=756, Invalid=4500, Unknown=0, NotChecked=0, Total=5256 [2022-11-02 20:24:43,666 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 327 mSDsluCounter, 154 mSDsCounter, 0 mSdLazyCounter, 585 mSolverCounterSat, 145 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 327 SdHoareTripleChecker+Valid, 168 SdHoareTripleChecker+Invalid, 790 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 145 IncrementalHoareTripleChecker+Valid, 585 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 60 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-02 20:24:43,666 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [327 Valid, 168 Invalid, 790 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [145 Valid, 585 Invalid, 0 Unknown, 60 Unchecked, 0.6s Time] [2022-11-02 20:24:43,667 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2022-11-02 20:24:43,680 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 71. [2022-11-02 20:24:43,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 70 states have (on average 1.1428571428571428) internal successors, (80), 70 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:24:43,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 80 transitions. [2022-11-02 20:24:43,681 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 80 transitions. Word has length 33 [2022-11-02 20:24:43,681 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:24:43,681 INFO L495 AbstractCegarLoop]: Abstraction has 71 states and 80 transitions. [2022-11-02 20:24:43,682 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.84375) internal successors, (91), 32 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:24:43,682 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 80 transitions. [2022-11-02 20:24:43,682 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-11-02 20:24:43,682 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:24:43,683 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:24:43,717 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa3dd297-0d87-4a2f-b1c7-72d0de936b5d/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-02 20:24:43,897 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa3dd297-0d87-4a2f-b1c7-72d0de936b5d/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-11-02 20:24:43,897 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:24:43,897 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:24:43,897 INFO L85 PathProgramCache]: Analyzing trace with hash 382246692, now seen corresponding path program 4 times [2022-11-02 20:24:43,898 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:24:43,898 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [963121634] [2022-11-02 20:24:43,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:24:43,898 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:24:43,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:24:44,410 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 6 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:24:44,411 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:24:44,411 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [963121634] [2022-11-02 20:24:44,411 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [963121634] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:24:44,411 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1254896534] [2022-11-02 20:24:44,412 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-02 20:24:44,412 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:24:44,412 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa3dd297-0d87-4a2f-b1c7-72d0de936b5d/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:24:44,417 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa3dd297-0d87-4a2f-b1c7-72d0de936b5d/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:24:44,423 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa3dd297-0d87-4a2f-b1c7-72d0de936b5d/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-02 20:24:44,482 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-02 20:24:44,482 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-02 20:24:44,483 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-02 20:24:44,485 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:24:44,554 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-02 20:24:44,753 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2022-11-02 20:24:44,768 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 6 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:24:44,768 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:24:44,916 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 15 [2022-11-02 20:24:44,924 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 20 [2022-11-02 20:24:44,960 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 6 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:24:44,960 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1254896534] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:24:44,961 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 20:24:44,961 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 11] total 25 [2022-11-02 20:24:44,961 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [666255997] [2022-11-02 20:24:44,961 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 20:24:44,962 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-11-02 20:24:44,962 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:24:44,962 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-11-02 20:24:44,963 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=516, Unknown=0, NotChecked=0, Total=600 [2022-11-02 20:24:44,963 INFO L87 Difference]: Start difference. First operand 71 states and 80 transitions. Second operand has 25 states, 25 states have (on average 3.72) internal successors, (93), 25 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:24:45,819 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:24:45,819 INFO L93 Difference]: Finished difference Result 129 states and 144 transitions. [2022-11-02 20:24:45,819 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-11-02 20:24:45,820 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 3.72) internal successors, (93), 25 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2022-11-02 20:24:45,822 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:24:45,824 INFO L225 Difference]: With dead ends: 129 [2022-11-02 20:24:45,825 INFO L226 Difference]: Without dead ends: 119 [2022-11-02 20:24:45,826 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 63 SyntacticMatches, 3 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 477 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=283, Invalid=1523, Unknown=0, NotChecked=0, Total=1806 [2022-11-02 20:24:45,828 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 126 mSDsluCounter, 240 mSDsCounter, 0 mSdLazyCounter, 558 mSolverCounterSat, 55 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 126 SdHoareTripleChecker+Valid, 263 SdHoareTripleChecker+Invalid, 613 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 55 IncrementalHoareTripleChecker+Valid, 558 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-02 20:24:45,829 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [126 Valid, 263 Invalid, 613 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [55 Valid, 558 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-02 20:24:45,830 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2022-11-02 20:24:45,854 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 77. [2022-11-02 20:24:45,854 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 76 states have (on average 1.131578947368421) internal successors, (86), 76 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:24:45,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 86 transitions. [2022-11-02 20:24:45,855 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 86 transitions. Word has length 39 [2022-11-02 20:24:45,856 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:24:45,856 INFO L495 AbstractCegarLoop]: Abstraction has 77 states and 86 transitions. [2022-11-02 20:24:45,856 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 3.72) internal successors, (93), 25 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:24:45,856 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 86 transitions. [2022-11-02 20:24:45,859 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-11-02 20:24:45,859 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:24:45,860 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:24:45,899 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa3dd297-0d87-4a2f-b1c7-72d0de936b5d/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-02 20:24:46,073 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa3dd297-0d87-4a2f-b1c7-72d0de936b5d/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-11-02 20:24:46,073 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:24:46,073 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:24:46,073 INFO L85 PathProgramCache]: Analyzing trace with hash -1287892696, now seen corresponding path program 2 times [2022-11-02 20:24:46,073 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:24:46,074 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1248948934] [2022-11-02 20:24:46,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:24:46,074 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:24:46,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:24:46,512 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:24:46,513 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:24:46,513 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1248948934] [2022-11-02 20:24:46,513 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1248948934] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:24:46,513 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1726012356] [2022-11-02 20:24:46,513 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-02 20:24:46,513 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:24:46,514 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa3dd297-0d87-4a2f-b1c7-72d0de936b5d/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:24:46,517 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa3dd297-0d87-4a2f-b1c7-72d0de936b5d/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:24:46,519 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa3dd297-0d87-4a2f-b1c7-72d0de936b5d/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-02 20:24:46,593 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-02 20:24:46,593 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-02 20:24:46,594 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 22 conjunts are in the unsatisfiable core [2022-11-02 20:24:46,596 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:24:46,628 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-02 20:24:46,818 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:24:46,819 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:24:46,959 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 15 [2022-11-02 20:24:46,962 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2022-11-02 20:24:46,984 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:24:46,985 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1726012356] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:24:46,985 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 20:24:46,985 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 11] total 24 [2022-11-02 20:24:46,985 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1089509734] [2022-11-02 20:24:46,986 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 20:24:46,986 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-11-02 20:24:46,986 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:24:46,986 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-11-02 20:24:46,987 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=466, Unknown=0, NotChecked=0, Total=552 [2022-11-02 20:24:46,987 INFO L87 Difference]: Start difference. First operand 77 states and 86 transitions. Second operand has 24 states, 24 states have (on average 4.0) internal successors, (96), 24 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:24:48,116 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:24:48,116 INFO L93 Difference]: Finished difference Result 169 states and 190 transitions. [2022-11-02 20:24:48,116 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2022-11-02 20:24:48,117 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 4.0) internal successors, (96), 24 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2022-11-02 20:24:48,117 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:24:48,118 INFO L225 Difference]: With dead ends: 169 [2022-11-02 20:24:48,118 INFO L226 Difference]: Without dead ends: 167 [2022-11-02 20:24:48,119 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 64 SyntacticMatches, 3 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 951 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=526, Invalid=2780, Unknown=0, NotChecked=0, Total=3306 [2022-11-02 20:24:48,120 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 227 mSDsluCounter, 220 mSDsCounter, 0 mSdLazyCounter, 767 mSolverCounterSat, 94 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 227 SdHoareTripleChecker+Valid, 247 SdHoareTripleChecker+Invalid, 861 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 94 IncrementalHoareTripleChecker+Valid, 767 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-02 20:24:48,120 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [227 Valid, 247 Invalid, 861 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [94 Valid, 767 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-02 20:24:48,121 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2022-11-02 20:24:48,135 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 83. [2022-11-02 20:24:48,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 82 states have (on average 1.1341463414634145) internal successors, (93), 82 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:24:48,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 93 transitions. [2022-11-02 20:24:48,136 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 93 transitions. Word has length 39 [2022-11-02 20:24:48,137 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:24:48,137 INFO L495 AbstractCegarLoop]: Abstraction has 83 states and 93 transitions. [2022-11-02 20:24:48,137 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 4.0) internal successors, (96), 24 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:24:48,137 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 93 transitions. [2022-11-02 20:24:48,138 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-11-02 20:24:48,138 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:24:48,138 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:24:48,173 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa3dd297-0d87-4a2f-b1c7-72d0de936b5d/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-11-02 20:24:48,361 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa3dd297-0d87-4a2f-b1c7-72d0de936b5d/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-11-02 20:24:48,361 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:24:48,361 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:24:48,361 INFO L85 PathProgramCache]: Analyzing trace with hash -270486921, now seen corresponding path program 5 times [2022-11-02 20:24:48,361 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:24:48,362 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [541516921] [2022-11-02 20:24:48,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:24:48,362 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:24:48,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:24:48,825 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 33 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:24:48,825 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:24:48,825 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [541516921] [2022-11-02 20:24:48,826 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [541516921] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:24:48,826 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1632604825] [2022-11-02 20:24:48,826 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-02 20:24:48,826 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:24:48,826 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa3dd297-0d87-4a2f-b1c7-72d0de936b5d/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:24:48,828 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa3dd297-0d87-4a2f-b1c7-72d0de936b5d/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:24:48,839 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa3dd297-0d87-4a2f-b1c7-72d0de936b5d/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-02 20:24:48,987 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2022-11-02 20:24:48,988 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-02 20:24:48,989 INFO L263 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-02 20:24:48,991 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:24:49,596 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 52 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:24:49,596 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:24:49,902 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 52 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:24:49,902 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1632604825] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:24:49,903 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 20:24:49,903 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 12] total 33 [2022-11-02 20:24:49,903 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1921838935] [2022-11-02 20:24:49,903 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 20:24:49,904 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-11-02 20:24:49,904 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:24:49,905 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-11-02 20:24:49,905 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=263, Invalid=793, Unknown=0, NotChecked=0, Total=1056 [2022-11-02 20:24:49,905 INFO L87 Difference]: Start difference. First operand 83 states and 93 transitions. Second operand has 33 states, 33 states have (on average 3.696969696969697) internal successors, (122), 33 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:24:50,289 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:24:50,290 INFO L93 Difference]: Finished difference Result 164 states and 182 transitions. [2022-11-02 20:24:50,290 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-11-02 20:24:50,290 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 3.696969696969697) internal successors, (122), 33 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 45 [2022-11-02 20:24:50,291 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:24:50,291 INFO L225 Difference]: With dead ends: 164 [2022-11-02 20:24:50,291 INFO L226 Difference]: Without dead ends: 104 [2022-11-02 20:24:50,292 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 70 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 493 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=418, Invalid=1142, Unknown=0, NotChecked=0, Total=1560 [2022-11-02 20:24:50,293 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 237 mSDsluCounter, 117 mSDsCounter, 0 mSdLazyCounter, 197 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 237 SdHoareTripleChecker+Valid, 141 SdHoareTripleChecker+Invalid, 248 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 197 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-02 20:24:50,294 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [237 Valid, 141 Invalid, 248 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 197 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-02 20:24:50,294 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2022-11-02 20:24:50,312 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 95. [2022-11-02 20:24:50,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95 states, 94 states have (on average 1.1170212765957446) internal successors, (105), 94 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:24:50,313 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 105 transitions. [2022-11-02 20:24:50,313 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 105 transitions. Word has length 45 [2022-11-02 20:24:50,314 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:24:50,314 INFO L495 AbstractCegarLoop]: Abstraction has 95 states and 105 transitions. [2022-11-02 20:24:50,314 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 3.696969696969697) internal successors, (122), 33 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:24:50,315 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 105 transitions. [2022-11-02 20:24:50,315 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2022-11-02 20:24:50,315 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:24:50,316 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:24:50,333 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa3dd297-0d87-4a2f-b1c7-72d0de936b5d/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-11-02 20:24:50,529 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa3dd297-0d87-4a2f-b1c7-72d0de936b5d/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-11-02 20:24:50,529 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:24:50,529 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:24:50,530 INFO L85 PathProgramCache]: Analyzing trace with hash -1534181648, now seen corresponding path program 6 times [2022-11-02 20:24:50,530 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:24:50,530 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [505784672] [2022-11-02 20:24:50,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:24:50,530 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:24:50,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:24:51,247 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 8 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:24:51,247 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:24:51,247 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [505784672] [2022-11-02 20:24:51,248 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [505784672] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:24:51,248 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [953830961] [2022-11-02 20:24:51,248 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-02 20:24:51,248 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:24:51,248 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa3dd297-0d87-4a2f-b1c7-72d0de936b5d/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:24:51,249 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa3dd297-0d87-4a2f-b1c7-72d0de936b5d/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:24:51,281 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa3dd297-0d87-4a2f-b1c7-72d0de936b5d/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-11-02 20:24:51,360 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-11-02 20:24:51,360 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-02 20:24:51,362 INFO L263 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 31 conjunts are in the unsatisfiable core [2022-11-02 20:24:51,365 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:24:51,541 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-02 20:24:51,579 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2022-11-02 20:24:52,079 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 8 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:24:52,082 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:24:52,396 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 25 [2022-11-02 20:24:52,401 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 146 treesize of output 138 [2022-11-02 20:24:52,596 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 8 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:24:52,596 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [953830961] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:24:52,596 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 20:24:52,596 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14, 14] total 39 [2022-11-02 20:24:52,597 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2028253843] [2022-11-02 20:24:52,597 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 20:24:52,597 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2022-11-02 20:24:52,597 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:24:52,598 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2022-11-02 20:24:52,598 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=152, Invalid=1330, Unknown=0, NotChecked=0, Total=1482 [2022-11-02 20:24:52,599 INFO L87 Difference]: Start difference. First operand 95 states and 105 transitions. Second operand has 39 states, 39 states have (on average 3.4871794871794872) internal successors, (136), 39 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:24:55,806 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:24:55,806 INFO L93 Difference]: Finished difference Result 225 states and 249 transitions. [2022-11-02 20:24:55,809 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2022-11-02 20:24:55,809 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 3.4871794871794872) internal successors, (136), 39 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 49 [2022-11-02 20:24:55,809 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:24:55,810 INFO L225 Difference]: With dead ends: 225 [2022-11-02 20:24:55,811 INFO L226 Difference]: Without dead ends: 215 [2022-11-02 20:24:55,813 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 75 SyntacticMatches, 8 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1788 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=816, Invalid=5664, Unknown=0, NotChecked=0, Total=6480 [2022-11-02 20:24:55,814 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 381 mSDsluCounter, 526 mSDsCounter, 0 mSdLazyCounter, 1262 mSolverCounterSat, 154 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 381 SdHoareTripleChecker+Valid, 555 SdHoareTripleChecker+Invalid, 1477 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 154 IncrementalHoareTripleChecker+Valid, 1262 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 61 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-11-02 20:24:55,815 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [381 Valid, 555 Invalid, 1477 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [154 Valid, 1262 Invalid, 0 Unknown, 61 Unchecked, 1.0s Time] [2022-11-02 20:24:55,816 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 215 states. [2022-11-02 20:24:55,837 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 215 to 125. [2022-11-02 20:24:55,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 125 states, 124 states have (on average 1.1129032258064515) internal successors, (138), 124 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:24:55,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 138 transitions. [2022-11-02 20:24:55,838 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 138 transitions. Word has length 49 [2022-11-02 20:24:55,838 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:24:55,839 INFO L495 AbstractCegarLoop]: Abstraction has 125 states and 138 transitions. [2022-11-02 20:24:55,839 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 3.4871794871794872) internal successors, (136), 39 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:24:55,839 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 138 transitions. [2022-11-02 20:24:55,840 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2022-11-02 20:24:55,840 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:24:55,841 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:24:55,879 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa3dd297-0d87-4a2f-b1c7-72d0de936b5d/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-11-02 20:24:56,069 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa3dd297-0d87-4a2f-b1c7-72d0de936b5d/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-11-02 20:24:56,069 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:24:56,069 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:24:56,069 INFO L85 PathProgramCache]: Analyzing trace with hash 746381232, now seen corresponding path program 1 times [2022-11-02 20:24:56,069 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:24:56,070 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [322129424] [2022-11-02 20:24:56,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:24:56,070 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:24:56,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:24:56,532 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 0 proven. 67 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:24:56,532 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:24:56,532 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [322129424] [2022-11-02 20:24:56,532 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [322129424] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:24:56,532 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [663358400] [2022-11-02 20:24:56,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:24:56,533 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:24:56,533 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa3dd297-0d87-4a2f-b1c7-72d0de936b5d/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:24:56,534 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa3dd297-0d87-4a2f-b1c7-72d0de936b5d/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:24:56,559 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa3dd297-0d87-4a2f-b1c7-72d0de936b5d/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-11-02 20:24:56,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:24:56,617 INFO L263 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 30 conjunts are in the unsatisfiable core [2022-11-02 20:24:56,619 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:24:56,650 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-02 20:24:56,663 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 28 [2022-11-02 20:24:56,893 INFO L356 Elim1Store]: treesize reduction 7, result has 30.0 percent of original size [2022-11-02 20:24:56,894 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 20 [2022-11-02 20:24:56,915 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 0 proven. 67 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:24:56,915 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:24:57,028 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 15 [2022-11-02 20:24:57,030 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2022-11-02 20:24:57,062 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 0 proven. 67 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:24:57,063 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [663358400] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:24:57,063 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 20:24:57,063 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 13] total 19 [2022-11-02 20:24:57,063 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1955412621] [2022-11-02 20:24:57,063 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 20:24:57,064 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-11-02 20:24:57,064 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:24:57,065 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-11-02 20:24:57,065 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=293, Unknown=0, NotChecked=0, Total=342 [2022-11-02 20:24:57,066 INFO L87 Difference]: Start difference. First operand 125 states and 138 transitions. Second operand has 19 states, 19 states have (on average 4.368421052631579) internal successors, (83), 19 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:24:58,345 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:24:58,345 INFO L93 Difference]: Finished difference Result 247 states and 275 transitions. [2022-11-02 20:24:58,346 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2022-11-02 20:24:58,346 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 4.368421052631579) internal successors, (83), 19 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 49 [2022-11-02 20:24:58,346 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:24:58,347 INFO L225 Difference]: With dead ends: 247 [2022-11-02 20:24:58,347 INFO L226 Difference]: Without dead ends: 245 [2022-11-02 20:24:58,348 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 151 GetRequests, 87 SyntacticMatches, 7 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 997 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=427, Invalid=2995, Unknown=0, NotChecked=0, Total=3422 [2022-11-02 20:24:58,349 INFO L413 NwaCegarLoop]: 32 mSDtfsCounter, 170 mSDsluCounter, 220 mSDsCounter, 0 mSdLazyCounter, 865 mSolverCounterSat, 87 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 170 SdHoareTripleChecker+Valid, 252 SdHoareTripleChecker+Invalid, 952 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 87 IncrementalHoareTripleChecker+Valid, 865 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-02 20:24:58,349 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [170 Valid, 252 Invalid, 952 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [87 Valid, 865 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-02 20:24:58,350 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 245 states. [2022-11-02 20:24:58,385 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 245 to 131. [2022-11-02 20:24:58,386 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131 states, 130 states have (on average 1.1153846153846154) internal successors, (145), 130 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:24:58,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 145 transitions. [2022-11-02 20:24:58,386 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 145 transitions. Word has length 49 [2022-11-02 20:24:58,387 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:24:58,387 INFO L495 AbstractCegarLoop]: Abstraction has 131 states and 145 transitions. [2022-11-02 20:24:58,387 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 4.368421052631579) internal successors, (83), 19 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:24:58,387 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 145 transitions. [2022-11-02 20:24:58,388 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-11-02 20:24:58,388 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:24:58,389 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:24:58,425 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa3dd297-0d87-4a2f-b1c7-72d0de936b5d/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-11-02 20:24:58,617 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa3dd297-0d87-4a2f-b1c7-72d0de936b5d/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-11-02 20:24:58,617 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:24:58,617 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:24:58,617 INFO L85 PathProgramCache]: Analyzing trace with hash -1012702775, now seen corresponding path program 3 times [2022-11-02 20:24:58,617 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:24:58,617 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1969812493] [2022-11-02 20:24:58,618 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:24:58,618 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:24:58,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:24:59,125 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 0 proven. 95 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:24:59,126 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:24:59,126 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1969812493] [2022-11-02 20:24:59,126 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1969812493] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:24:59,126 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1201437451] [2022-11-02 20:24:59,126 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-02 20:24:59,126 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:24:59,127 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa3dd297-0d87-4a2f-b1c7-72d0de936b5d/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:24:59,128 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa3dd297-0d87-4a2f-b1c7-72d0de936b5d/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:24:59,144 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa3dd297-0d87-4a2f-b1c7-72d0de936b5d/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-11-02 20:24:59,285 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2022-11-02 20:24:59,285 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-02 20:24:59,287 INFO L263 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 30 conjunts are in the unsatisfiable core [2022-11-02 20:24:59,290 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:24:59,337 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-02 20:24:59,643 INFO L356 Elim1Store]: treesize reduction 7, result has 30.0 percent of original size [2022-11-02 20:24:59,644 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 20 [2022-11-02 20:24:59,666 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 0 proven. 95 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:24:59,666 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:24:59,809 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 15 [2022-11-02 20:24:59,811 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2022-11-02 20:24:59,844 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 0 proven. 95 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:24:59,845 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1201437451] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:24:59,845 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 20:24:59,845 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14, 14] total 21 [2022-11-02 20:24:59,845 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [58365917] [2022-11-02 20:24:59,845 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 20:24:59,846 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-11-02 20:24:59,846 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:24:59,846 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-11-02 20:24:59,847 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=365, Unknown=0, NotChecked=0, Total=420 [2022-11-02 20:24:59,847 INFO L87 Difference]: Start difference. First operand 131 states and 145 transitions. Second operand has 21 states, 21 states have (on average 4.428571428571429) internal successors, (93), 21 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:25:02,350 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:25:02,350 INFO L93 Difference]: Finished difference Result 348 states and 391 transitions. [2022-11-02 20:25:02,351 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 90 states. [2022-11-02 20:25:02,351 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 4.428571428571429) internal successors, (93), 21 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 55 [2022-11-02 20:25:02,351 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:25:02,352 INFO L225 Difference]: With dead ends: 348 [2022-11-02 20:25:02,353 INFO L226 Difference]: Without dead ends: 346 [2022-11-02 20:25:02,355 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 199 GetRequests, 98 SyntacticMatches, 6 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3279 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=915, Invalid=8397, Unknown=0, NotChecked=0, Total=9312 [2022-11-02 20:25:02,356 INFO L413 NwaCegarLoop]: 46 mSDtfsCounter, 265 mSDsluCounter, 335 mSDsCounter, 0 mSdLazyCounter, 1352 mSolverCounterSat, 144 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 265 SdHoareTripleChecker+Valid, 381 SdHoareTripleChecker+Invalid, 1496 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 144 IncrementalHoareTripleChecker+Valid, 1352 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-11-02 20:25:02,356 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [265 Valid, 381 Invalid, 1496 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [144 Valid, 1352 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-11-02 20:25:02,357 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 346 states. [2022-11-02 20:25:02,386 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 346 to 143. [2022-11-02 20:25:02,386 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 143 states, 142 states have (on average 1.1126760563380282) internal successors, (158), 142 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:25:02,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 158 transitions. [2022-11-02 20:25:02,387 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 158 transitions. Word has length 55 [2022-11-02 20:25:02,387 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:25:02,388 INFO L495 AbstractCegarLoop]: Abstraction has 143 states and 158 transitions. [2022-11-02 20:25:02,388 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 4.428571428571429) internal successors, (93), 21 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:25:02,388 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 158 transitions. [2022-11-02 20:25:02,389 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2022-11-02 20:25:02,389 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:25:02,389 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:25:02,418 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa3dd297-0d87-4a2f-b1c7-72d0de936b5d/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2022-11-02 20:25:02,601 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa3dd297-0d87-4a2f-b1c7-72d0de936b5d/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-11-02 20:25:02,601 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:25:02,601 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:25:02,601 INFO L85 PathProgramCache]: Analyzing trace with hash 1404832086, now seen corresponding path program 7 times [2022-11-02 20:25:02,601 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:25:02,601 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1667734229] [2022-11-02 20:25:02,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:25:02,605 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:25:02,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:25:03,258 INFO L134 CoverageAnalysis]: Checked inductivity of 129 backedges. 83 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:25:03,258 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:25:03,259 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1667734229] [2022-11-02 20:25:03,259 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1667734229] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:25:03,259 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [385619376] [2022-11-02 20:25:03,259 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-02 20:25:03,259 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:25:03,259 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa3dd297-0d87-4a2f-b1c7-72d0de936b5d/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:25:03,261 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa3dd297-0d87-4a2f-b1c7-72d0de936b5d/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:25:03,277 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa3dd297-0d87-4a2f-b1c7-72d0de936b5d/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-11-02 20:25:03,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:25:03,379 INFO L263 TraceCheckSpWp]: Trace formula consists of 202 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-02 20:25:03,381 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:25:04,197 INFO L134 CoverageAnalysis]: Checked inductivity of 129 backedges. 114 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:25:04,198 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:25:04,575 INFO L134 CoverageAnalysis]: Checked inductivity of 129 backedges. 114 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:25:04,576 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [385619376] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:25:04,576 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 20:25:04,576 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 15] total 42 [2022-11-02 20:25:04,576 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [411332074] [2022-11-02 20:25:04,576 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 20:25:04,577 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2022-11-02 20:25:04,577 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:25:04,578 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2022-11-02 20:25:04,578 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=412, Invalid=1310, Unknown=0, NotChecked=0, Total=1722 [2022-11-02 20:25:04,579 INFO L87 Difference]: Start difference. First operand 143 states and 158 transitions. Second operand has 42 states, 42 states have (on average 4.0476190476190474) internal successors, (170), 42 states have internal predecessors, (170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:25:05,088 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:25:05,088 INFO L93 Difference]: Finished difference Result 272 states and 300 transitions. [2022-11-02 20:25:05,088 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-11-02 20:25:05,089 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 4.0476190476190474) internal successors, (170), 42 states have internal predecessors, (170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 61 [2022-11-02 20:25:05,089 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:25:05,090 INFO L225 Difference]: With dead ends: 272 [2022-11-02 20:25:05,090 INFO L226 Difference]: Without dead ends: 164 [2022-11-02 20:25:05,093 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 96 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 866 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=618, Invalid=1832, Unknown=0, NotChecked=0, Total=2450 [2022-11-02 20:25:05,093 INFO L413 NwaCegarLoop]: 32 mSDtfsCounter, 464 mSDsluCounter, 156 mSDsCounter, 0 mSdLazyCounter, 226 mSolverCounterSat, 90 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 464 SdHoareTripleChecker+Valid, 188 SdHoareTripleChecker+Invalid, 316 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 90 IncrementalHoareTripleChecker+Valid, 226 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-02 20:25:05,094 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [464 Valid, 188 Invalid, 316 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [90 Valid, 226 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-02 20:25:05,094 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164 states. [2022-11-02 20:25:05,127 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164 to 155. [2022-11-02 20:25:05,128 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 155 states, 154 states have (on average 1.103896103896104) internal successors, (170), 154 states have internal predecessors, (170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:25:05,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 170 transitions. [2022-11-02 20:25:05,129 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 170 transitions. Word has length 61 [2022-11-02 20:25:05,129 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:25:05,129 INFO L495 AbstractCegarLoop]: Abstraction has 155 states and 170 transitions. [2022-11-02 20:25:05,129 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 4.0476190476190474) internal successors, (170), 42 states have internal predecessors, (170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:25:05,129 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 170 transitions. [2022-11-02 20:25:05,130 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2022-11-02 20:25:05,130 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:25:05,130 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:25:05,155 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa3dd297-0d87-4a2f-b1c7-72d0de936b5d/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-11-02 20:25:05,337 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa3dd297-0d87-4a2f-b1c7-72d0de936b5d/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:25:05,337 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:25:05,337 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:25:05,337 INFO L85 PathProgramCache]: Analyzing trace with hash 337347535, now seen corresponding path program 8 times [2022-11-02 20:25:05,337 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:25:05,337 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [226603387] [2022-11-02 20:25:05,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:25:05,338 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:25:05,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:25:06,048 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 12 proven. 130 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:25:06,048 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:25:06,048 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [226603387] [2022-11-02 20:25:06,048 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [226603387] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:25:06,048 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [653395246] [2022-11-02 20:25:06,048 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-02 20:25:06,049 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:25:06,049 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa3dd297-0d87-4a2f-b1c7-72d0de936b5d/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:25:06,050 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa3dd297-0d87-4a2f-b1c7-72d0de936b5d/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:25:06,051 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa3dd297-0d87-4a2f-b1c7-72d0de936b5d/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-11-02 20:25:06,146 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-02 20:25:06,146 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-02 20:25:06,155 INFO L263 TraceCheckSpWp]: Trace formula consists of 215 conjuncts, 39 conjunts are in the unsatisfiable core [2022-11-02 20:25:06,158 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:25:06,393 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-02 20:25:06,439 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2022-11-02 20:25:06,959 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 12 proven. 130 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:25:06,960 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:25:07,599 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 33 [2022-11-02 20:25:07,604 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 43 [2022-11-02 20:25:08,223 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 0 proven. 142 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:25:08,229 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [653395246] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:25:08,229 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 20:25:08,229 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 17, 19] total 50 [2022-11-02 20:25:08,230 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [79441873] [2022-11-02 20:25:08,230 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 20:25:08,230 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2022-11-02 20:25:08,231 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:25:08,231 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2022-11-02 20:25:08,232 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=187, Invalid=2263, Unknown=0, NotChecked=0, Total=2450 [2022-11-02 20:25:08,233 INFO L87 Difference]: Start difference. First operand 155 states and 170 transitions. Second operand has 50 states, 50 states have (on average 3.74) internal successors, (187), 50 states have internal predecessors, (187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:25:16,632 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:25:16,632 INFO L93 Difference]: Finished difference Result 395 states and 438 transitions. [2022-11-02 20:25:16,632 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 110 states. [2022-11-02 20:25:16,632 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 50 states have (on average 3.74) internal successors, (187), 50 states have internal predecessors, (187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2022-11-02 20:25:16,633 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:25:16,634 INFO L225 Difference]: With dead ends: 395 [2022-11-02 20:25:16,635 INFO L226 Difference]: Without dead ends: 385 [2022-11-02 20:25:16,641 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 252 GetRequests, 97 SyntacticMatches, 2 SemanticMatches, 153 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6866 ImplicationChecksByTransitivity, 7.9s TimeCoverageRelationStatistics Valid=2202, Invalid=21668, Unknown=0, NotChecked=0, Total=23870 [2022-11-02 20:25:16,642 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 575 mSDsluCounter, 458 mSDsCounter, 0 mSdLazyCounter, 2026 mSolverCounterSat, 398 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 575 SdHoareTripleChecker+Valid, 484 SdHoareTripleChecker+Invalid, 2424 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 398 IncrementalHoareTripleChecker+Valid, 2026 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2022-11-02 20:25:16,642 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [575 Valid, 484 Invalid, 2424 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [398 Valid, 2026 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2022-11-02 20:25:16,643 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 385 states. [2022-11-02 20:25:16,679 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 385 to 161. [2022-11-02 20:25:16,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 161 states, 160 states have (on average 1.1) internal successors, (176), 160 states have internal predecessors, (176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:25:16,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 176 transitions. [2022-11-02 20:25:16,681 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 176 transitions. Word has length 65 [2022-11-02 20:25:16,681 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:25:16,681 INFO L495 AbstractCegarLoop]: Abstraction has 161 states and 176 transitions. [2022-11-02 20:25:16,681 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 50 states have (on average 3.74) internal successors, (187), 50 states have internal predecessors, (187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:25:16,681 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 176 transitions. [2022-11-02 20:25:16,682 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2022-11-02 20:25:16,682 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:25:16,682 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:25:16,711 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa3dd297-0d87-4a2f-b1c7-72d0de936b5d/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-11-02 20:25:16,882 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa3dd297-0d87-4a2f-b1c7-72d0de936b5d/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:25:16,883 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:25:16,883 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:25:16,883 INFO L85 PathProgramCache]: Analyzing trace with hash 1382106319, now seen corresponding path program 2 times [2022-11-02 20:25:16,883 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:25:16,883 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [200582126] [2022-11-02 20:25:16,883 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:25:16,883 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:25:16,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:25:17,539 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 0 proven. 142 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:25:17,539 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:25:17,540 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [200582126] [2022-11-02 20:25:17,540 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [200582126] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:25:17,540 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1497226231] [2022-11-02 20:25:17,540 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-02 20:25:17,540 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:25:17,541 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa3dd297-0d87-4a2f-b1c7-72d0de936b5d/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:25:17,542 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa3dd297-0d87-4a2f-b1c7-72d0de936b5d/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:25:17,546 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa3dd297-0d87-4a2f-b1c7-72d0de936b5d/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-11-02 20:25:17,641 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-02 20:25:17,641 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-02 20:25:17,643 INFO L263 TraceCheckSpWp]: Trace formula consists of 215 conjuncts, 34 conjunts are in the unsatisfiable core [2022-11-02 20:25:17,646 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:25:17,693 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-02 20:25:17,706 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 28 [2022-11-02 20:25:18,025 INFO L356 Elim1Store]: treesize reduction 7, result has 30.0 percent of original size [2022-11-02 20:25:18,025 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 20 [2022-11-02 20:25:18,048 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 0 proven. 142 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:25:18,049 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:25:18,212 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 15 [2022-11-02 20:25:18,214 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2022-11-02 20:25:18,277 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 0 proven. 142 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:25:18,277 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1497226231] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:25:18,277 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 20:25:18,277 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16, 16] total 24 [2022-11-02 20:25:18,277 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [271811470] [2022-11-02 20:25:18,277 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 20:25:18,278 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-11-02 20:25:18,278 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:25:18,278 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-11-02 20:25:18,279 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=488, Unknown=0, NotChecked=0, Total=552 [2022-11-02 20:25:18,279 INFO L87 Difference]: Start difference. First operand 161 states and 176 transitions. Second operand has 24 states, 24 states have (on average 4.625) internal successors, (111), 24 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:25:21,102 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:25:21,102 INFO L93 Difference]: Finished difference Result 411 states and 460 transitions. [2022-11-02 20:25:21,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 104 states. [2022-11-02 20:25:21,103 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 4.625) internal successors, (111), 24 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2022-11-02 20:25:21,104 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:25:21,105 INFO L225 Difference]: With dead ends: 411 [2022-11-02 20:25:21,106 INFO L226 Difference]: Without dead ends: 409 [2022-11-02 20:25:21,108 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 234 GetRequests, 117 SyntacticMatches, 7 SemanticMatches, 110 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4410 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=1090, Invalid=11342, Unknown=0, NotChecked=0, Total=12432 [2022-11-02 20:25:21,109 INFO L413 NwaCegarLoop]: 37 mSDtfsCounter, 385 mSDsluCounter, 359 mSDsCounter, 0 mSdLazyCounter, 1547 mSolverCounterSat, 199 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 385 SdHoareTripleChecker+Valid, 396 SdHoareTripleChecker+Invalid, 1746 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 199 IncrementalHoareTripleChecker+Valid, 1547 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-11-02 20:25:21,109 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [385 Valid, 396 Invalid, 1746 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [199 Valid, 1547 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-11-02 20:25:21,110 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 409 states. [2022-11-02 20:25:21,149 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 409 to 167. [2022-11-02 20:25:21,150 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 167 states, 166 states have (on average 1.1024096385542168) internal successors, (183), 166 states have internal predecessors, (183), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:25:21,150 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 183 transitions. [2022-11-02 20:25:21,151 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 183 transitions. Word has length 65 [2022-11-02 20:25:21,151 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:25:21,151 INFO L495 AbstractCegarLoop]: Abstraction has 167 states and 183 transitions. [2022-11-02 20:25:21,151 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 4.625) internal successors, (111), 24 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:25:21,152 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 183 transitions. [2022-11-02 20:25:21,152 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2022-11-02 20:25:21,153 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:25:21,153 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 7, 7, 7, 7, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:25:21,186 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa3dd297-0d87-4a2f-b1c7-72d0de936b5d/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-11-02 20:25:21,369 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa3dd297-0d87-4a2f-b1c7-72d0de936b5d/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2022-11-02 20:25:21,369 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:25:21,369 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:25:21,369 INFO L85 PathProgramCache]: Analyzing trace with hash -1975375134, now seen corresponding path program 9 times [2022-11-02 20:25:21,369 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:25:21,370 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [478781215] [2022-11-02 20:25:21,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:25:21,370 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:25:21,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:25:22,107 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 14 proven. 168 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:25:22,107 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:25:22,107 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [478781215] [2022-11-02 20:25:22,107 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [478781215] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:25:22,108 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1689908821] [2022-11-02 20:25:22,108 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-02 20:25:22,108 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:25:22,108 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa3dd297-0d87-4a2f-b1c7-72d0de936b5d/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:25:22,111 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa3dd297-0d87-4a2f-b1c7-72d0de936b5d/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:25:22,111 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa3dd297-0d87-4a2f-b1c7-72d0de936b5d/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-11-02 20:25:22,424 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2022-11-02 20:25:22,425 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-02 20:25:22,427 INFO L263 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 35 conjunts are in the unsatisfiable core [2022-11-02 20:25:22,429 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:25:22,560 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-02 20:25:23,181 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 14 proven. 168 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:25:23,181 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:25:23,603 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 17 [2022-11-02 20:25:23,607 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 24 [2022-11-02 20:25:23,760 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 14 proven. 168 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:25:23,760 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1689908821] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:25:23,760 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 20:25:23,760 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 17, 16] total 45 [2022-11-02 20:25:23,761 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [927479107] [2022-11-02 20:25:23,761 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 20:25:23,761 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2022-11-02 20:25:23,761 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:25:23,762 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2022-11-02 20:25:23,762 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=158, Invalid=1822, Unknown=0, NotChecked=0, Total=1980 [2022-11-02 20:25:23,763 INFO L87 Difference]: Start difference. First operand 167 states and 183 transitions. Second operand has 45 states, 45 states have (on average 4.355555555555555) internal successors, (196), 45 states have internal predecessors, (196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:25:28,734 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:25:28,735 INFO L93 Difference]: Finished difference Result 364 states and 393 transitions. [2022-11-02 20:25:28,736 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2022-11-02 20:25:28,736 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 45 states have (on average 4.355555555555555) internal successors, (196), 45 states have internal predecessors, (196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 71 [2022-11-02 20:25:28,736 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:25:28,738 INFO L225 Difference]: With dead ends: 364 [2022-11-02 20:25:28,738 INFO L226 Difference]: Without dead ends: 354 [2022-11-02 20:25:28,740 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 233 GetRequests, 116 SyntacticMatches, 0 SemanticMatches, 117 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3607 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=1344, Invalid=12698, Unknown=0, NotChecked=0, Total=14042 [2022-11-02 20:25:28,741 INFO L413 NwaCegarLoop]: 36 mSDtfsCounter, 618 mSDsluCounter, 475 mSDsCounter, 0 mSdLazyCounter, 1467 mSolverCounterSat, 340 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 618 SdHoareTripleChecker+Valid, 511 SdHoareTripleChecker+Invalid, 1807 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 340 IncrementalHoareTripleChecker+Valid, 1467 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-11-02 20:25:28,741 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [618 Valid, 511 Invalid, 1807 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [340 Valid, 1467 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-11-02 20:25:28,742 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 354 states. [2022-11-02 20:25:28,783 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 354 to 173. [2022-11-02 20:25:28,783 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 173 states, 172 states have (on average 1.0988372093023255) internal successors, (189), 172 states have internal predecessors, (189), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:25:28,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173 states to 173 states and 189 transitions. [2022-11-02 20:25:28,784 INFO L78 Accepts]: Start accepts. Automaton has 173 states and 189 transitions. Word has length 71 [2022-11-02 20:25:28,784 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:25:28,785 INFO L495 AbstractCegarLoop]: Abstraction has 173 states and 189 transitions. [2022-11-02 20:25:28,785 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 4.355555555555555) internal successors, (196), 45 states have internal predecessors, (196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:25:28,785 INFO L276 IsEmpty]: Start isEmpty. Operand 173 states and 189 transitions. [2022-11-02 20:25:28,786 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2022-11-02 20:25:28,786 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:25:28,786 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 7, 7, 7, 7, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:25:28,813 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa3dd297-0d87-4a2f-b1c7-72d0de936b5d/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-11-02 20:25:28,996 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa3dd297-0d87-4a2f-b1c7-72d0de936b5d/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2022-11-02 20:25:28,996 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:25:28,997 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:25:28,997 INFO L85 PathProgramCache]: Analyzing trace with hash 1821094634, now seen corresponding path program 4 times [2022-11-02 20:25:28,997 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:25:28,997 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1124163257] [2022-11-02 20:25:28,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:25:28,998 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:25:29,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:25:29,613 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 0 proven. 182 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:25:29,614 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:25:29,614 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1124163257] [2022-11-02 20:25:29,614 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1124163257] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:25:29,614 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1139752594] [2022-11-02 20:25:29,614 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-02 20:25:29,614 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:25:29,614 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa3dd297-0d87-4a2f-b1c7-72d0de936b5d/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:25:29,616 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa3dd297-0d87-4a2f-b1c7-72d0de936b5d/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:25:29,637 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa3dd297-0d87-4a2f-b1c7-72d0de936b5d/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-11-02 20:25:29,735 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-02 20:25:29,735 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-02 20:25:29,737 INFO L263 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 36 conjunts are in the unsatisfiable core [2022-11-02 20:25:29,740 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:25:29,794 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-02 20:25:30,273 INFO L356 Elim1Store]: treesize reduction 7, result has 30.0 percent of original size [2022-11-02 20:25:30,273 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 20 [2022-11-02 20:25:30,304 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 0 proven. 182 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:25:30,304 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:25:30,469 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 15 [2022-11-02 20:25:30,471 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2022-11-02 20:25:30,530 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 0 proven. 182 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:25:30,531 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1139752594] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:25:30,531 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 20:25:30,531 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17, 17] total 26 [2022-11-02 20:25:30,532 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1267955912] [2022-11-02 20:25:30,532 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 20:25:30,532 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-11-02 20:25:30,533 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:25:30,533 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-11-02 20:25:30,534 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=580, Unknown=0, NotChecked=0, Total=650 [2022-11-02 20:25:30,534 INFO L87 Difference]: Start difference. First operand 173 states and 189 transitions. Second operand has 26 states, 26 states have (on average 4.653846153846154) internal successors, (121), 26 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:25:35,948 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:25:35,949 INFO L93 Difference]: Finished difference Result 582 states and 654 transitions. [2022-11-02 20:25:35,949 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 177 states. [2022-11-02 20:25:35,949 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 4.653846153846154) internal successors, (121), 26 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 71 [2022-11-02 20:25:35,949 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:25:35,952 INFO L225 Difference]: With dead ends: 582 [2022-11-02 20:25:35,952 INFO L226 Difference]: Without dead ends: 580 [2022-11-02 20:25:35,956 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 318 GetRequests, 128 SyntacticMatches, 6 SemanticMatches, 184 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13930 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=2296, Invalid=32114, Unknown=0, NotChecked=0, Total=34410 [2022-11-02 20:25:35,957 INFO L413 NwaCegarLoop]: 56 mSDtfsCounter, 545 mSDsluCounter, 545 mSDsCounter, 0 mSdLazyCounter, 2399 mSolverCounterSat, 286 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 545 SdHoareTripleChecker+Valid, 601 SdHoareTripleChecker+Invalid, 2685 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 286 IncrementalHoareTripleChecker+Valid, 2399 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2022-11-02 20:25:35,957 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [545 Valid, 601 Invalid, 2685 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [286 Valid, 2399 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2022-11-02 20:25:35,958 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 580 states. [2022-11-02 20:25:36,010 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 580 to 179. [2022-11-02 20:25:36,010 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 179 states, 178 states have (on average 1.101123595505618) internal successors, (196), 178 states have internal predecessors, (196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:25:36,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 179 states to 179 states and 196 transitions. [2022-11-02 20:25:36,011 INFO L78 Accepts]: Start accepts. Automaton has 179 states and 196 transitions. Word has length 71 [2022-11-02 20:25:36,012 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:25:36,012 INFO L495 AbstractCegarLoop]: Abstraction has 179 states and 196 transitions. [2022-11-02 20:25:36,012 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 4.653846153846154) internal successors, (121), 26 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:25:36,013 INFO L276 IsEmpty]: Start isEmpty. Operand 179 states and 196 transitions. [2022-11-02 20:25:36,013 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2022-11-02 20:25:36,014 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:25:36,014 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 8, 8, 8, 8, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:25:36,043 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa3dd297-0d87-4a2f-b1c7-72d0de936b5d/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-11-02 20:25:36,225 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa3dd297-0d87-4a2f-b1c7-72d0de936b5d/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:25:36,225 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:25:36,225 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:25:36,225 INFO L85 PathProgramCache]: Analyzing trace with hash 1772484533, now seen corresponding path program 10 times [2022-11-02 20:25:36,226 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:25:36,226 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1856162207] [2022-11-02 20:25:36,226 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:25:36,226 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:25:36,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:25:37,164 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 157 proven. 71 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:25:37,164 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:25:37,164 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1856162207] [2022-11-02 20:25:37,164 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1856162207] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:25:37,164 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1651722783] [2022-11-02 20:25:37,165 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-02 20:25:37,165 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:25:37,165 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa3dd297-0d87-4a2f-b1c7-72d0de936b5d/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:25:37,166 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa3dd297-0d87-4a2f-b1c7-72d0de936b5d/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:25:37,185 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa3dd297-0d87-4a2f-b1c7-72d0de936b5d/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-11-02 20:25:37,288 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-02 20:25:37,288 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-02 20:25:37,290 INFO L263 TraceCheckSpWp]: Trace formula consists of 202 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-02 20:25:37,292 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:25:38,420 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 200 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:25:38,420 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:25:38,921 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 200 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:25:38,921 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1651722783] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:25:38,921 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 20:25:38,921 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19, 18] total 52 [2022-11-02 20:25:38,921 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [424088497] [2022-11-02 20:25:38,921 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 20:25:38,922 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2022-11-02 20:25:38,922 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:25:38,923 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2022-11-02 20:25:38,924 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=614, Invalid=2038, Unknown=0, NotChecked=0, Total=2652 [2022-11-02 20:25:38,924 INFO L87 Difference]: Start difference. First operand 179 states and 196 transitions. Second operand has 52 states, 52 states have (on average 4.211538461538462) internal successors, (219), 52 states have internal predecessors, (219), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:25:39,583 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:25:39,583 INFO L93 Difference]: Finished difference Result 332 states and 364 transitions. [2022-11-02 20:25:39,583 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-11-02 20:25:39,584 INFO L78 Accepts]: Start accepts. Automaton has has 52 states, 52 states have (on average 4.211538461538462) internal successors, (219), 52 states have internal predecessors, (219), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 77 [2022-11-02 20:25:39,584 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:25:39,585 INFO L225 Difference]: With dead ends: 332 [2022-11-02 20:25:39,585 INFO L226 Difference]: Without dead ends: 200 [2022-11-02 20:25:39,586 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 181 GetRequests, 122 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1374 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=887, Invalid=2773, Unknown=0, NotChecked=0, Total=3660 [2022-11-02 20:25:39,587 INFO L413 NwaCegarLoop]: 40 mSDtfsCounter, 411 mSDsluCounter, 362 mSDsCounter, 0 mSdLazyCounter, 427 mSolverCounterSat, 97 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 411 SdHoareTripleChecker+Valid, 402 SdHoareTripleChecker+Invalid, 524 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 97 IncrementalHoareTripleChecker+Valid, 427 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-02 20:25:39,587 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [411 Valid, 402 Invalid, 524 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [97 Valid, 427 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-02 20:25:39,588 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 200 states. [2022-11-02 20:25:39,628 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 200 to 191. [2022-11-02 20:25:39,628 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 191 states, 190 states have (on average 1.0947368421052632) internal successors, (208), 190 states have internal predecessors, (208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:25:39,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 191 states to 191 states and 208 transitions. [2022-11-02 20:25:39,630 INFO L78 Accepts]: Start accepts. Automaton has 191 states and 208 transitions. Word has length 77 [2022-11-02 20:25:39,630 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:25:39,630 INFO L495 AbstractCegarLoop]: Abstraction has 191 states and 208 transitions. [2022-11-02 20:25:39,630 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 52 states, 52 states have (on average 4.211538461538462) internal successors, (219), 52 states have internal predecessors, (219), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:25:39,631 INFO L276 IsEmpty]: Start isEmpty. Operand 191 states and 208 transitions. [2022-11-02 20:25:39,631 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2022-11-02 20:25:39,632 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:25:39,632 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 8, 8, 8, 8, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:25:39,701 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa3dd297-0d87-4a2f-b1c7-72d0de936b5d/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2022-11-02 20:25:39,841 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa3dd297-0d87-4a2f-b1c7-72d0de936b5d/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:25:39,841 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:25:39,841 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:25:39,841 INFO L85 PathProgramCache]: Analyzing trace with hash -1608818642, now seen corresponding path program 11 times [2022-11-02 20:25:39,842 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:25:39,842 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1677429876] [2022-11-02 20:25:39,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:25:39,842 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:25:39,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:25:40,887 INFO L134 CoverageAnalysis]: Checked inductivity of 245 backedges. 16 proven. 229 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:25:40,887 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:25:40,887 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1677429876] [2022-11-02 20:25:40,887 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1677429876] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:25:40,887 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [669012960] [2022-11-02 20:25:40,887 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-02 20:25:40,887 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:25:40,888 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa3dd297-0d87-4a2f-b1c7-72d0de936b5d/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:25:40,888 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa3dd297-0d87-4a2f-b1c7-72d0de936b5d/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:25:40,895 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa3dd297-0d87-4a2f-b1c7-72d0de936b5d/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-11-02 20:25:41,169 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2022-11-02 20:25:41,169 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-02 20:25:41,171 INFO L263 TraceCheckSpWp]: Trace formula consists of 254 conjuncts, 39 conjunts are in the unsatisfiable core [2022-11-02 20:25:41,174 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:25:41,456 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-02 20:25:41,503 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2022-11-02 20:25:42,249 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2022-11-02 20:25:42,261 INFO L134 CoverageAnalysis]: Checked inductivity of 245 backedges. 16 proven. 229 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:25:42,261 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:25:42,875 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 17 [2022-11-02 20:25:42,882 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 24 [2022-11-02 20:25:43,247 INFO L134 CoverageAnalysis]: Checked inductivity of 245 backedges. 16 proven. 229 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:25:43,248 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [669012960] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:25:43,248 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 20:25:43,248 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 20, 20] total 56 [2022-11-02 20:25:43,248 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [277939099] [2022-11-02 20:25:43,248 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 20:25:43,249 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 56 states [2022-11-02 20:25:43,249 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:25:43,249 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2022-11-02 20:25:43,250 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=213, Invalid=2867, Unknown=0, NotChecked=0, Total=3080 [2022-11-02 20:25:43,250 INFO L87 Difference]: Start difference. First operand 191 states and 208 transitions. Second operand has 56 states, 56 states have (on average 4.125) internal successors, (231), 56 states have internal predecessors, (231), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:25:53,556 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:25:53,557 INFO L93 Difference]: Finished difference Result 453 states and 489 transitions. [2022-11-02 20:25:53,557 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 114 states. [2022-11-02 20:25:53,558 INFO L78 Accepts]: Start accepts. Automaton has has 56 states, 56 states have (on average 4.125) internal successors, (231), 56 states have internal predecessors, (231), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 81 [2022-11-02 20:25:53,558 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:25:53,560 INFO L225 Difference]: With dead ends: 453 [2022-11-02 20:25:53,560 INFO L226 Difference]: Without dead ends: 443 [2022-11-02 20:25:53,570 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 291 GetRequests, 126 SyntacticMatches, 2 SemanticMatches, 163 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7432 ImplicationChecksByTransitivity, 9.3s TimeCoverageRelationStatistics Valid=2400, Invalid=24660, Unknown=0, NotChecked=0, Total=27060 [2022-11-02 20:25:53,571 INFO L413 NwaCegarLoop]: 39 mSDtfsCounter, 692 mSDsluCounter, 994 mSDsCounter, 0 mSdLazyCounter, 2961 mSolverCounterSat, 377 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 692 SdHoareTripleChecker+Valid, 1033 SdHoareTripleChecker+Invalid, 3338 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 377 IncrementalHoareTripleChecker+Valid, 2961 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2022-11-02 20:25:53,571 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [692 Valid, 1033 Invalid, 3338 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [377 Valid, 2961 Invalid, 0 Unknown, 0 Unchecked, 2.4s Time] [2022-11-02 20:25:53,573 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 443 states. [2022-11-02 20:25:53,620 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 443 to 215. [2022-11-02 20:25:53,621 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 215 states, 214 states have (on average 1.0981308411214954) internal successors, (235), 214 states have internal predecessors, (235), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:25:53,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 215 states to 215 states and 235 transitions. [2022-11-02 20:25:53,622 INFO L78 Accepts]: Start accepts. Automaton has 215 states and 235 transitions. Word has length 81 [2022-11-02 20:25:53,622 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:25:53,622 INFO L495 AbstractCegarLoop]: Abstraction has 215 states and 235 transitions. [2022-11-02 20:25:53,623 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 56 states, 56 states have (on average 4.125) internal successors, (231), 56 states have internal predecessors, (231), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:25:53,623 INFO L276 IsEmpty]: Start isEmpty. Operand 215 states and 235 transitions. [2022-11-02 20:25:53,624 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2022-11-02 20:25:53,624 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:25:53,625 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 8, 8, 8, 8, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:25:53,641 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa3dd297-0d87-4a2f-b1c7-72d0de936b5d/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2022-11-02 20:25:53,831 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa3dd297-0d87-4a2f-b1c7-72d0de936b5d/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:25:53,831 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:25:53,832 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:25:53,832 INFO L85 PathProgramCache]: Analyzing trace with hash 700539246, now seen corresponding path program 3 times [2022-11-02 20:25:53,832 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:25:53,832 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [709056637] [2022-11-02 20:25:53,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:25:53,833 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:25:53,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:25:54,693 INFO L134 CoverageAnalysis]: Checked inductivity of 245 backedges. 0 proven. 245 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:25:54,694 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:25:54,694 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [709056637] [2022-11-02 20:25:54,694 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [709056637] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:25:54,694 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1352393306] [2022-11-02 20:25:54,694 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-02 20:25:54,695 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:25:54,695 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa3dd297-0d87-4a2f-b1c7-72d0de936b5d/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:25:54,696 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa3dd297-0d87-4a2f-b1c7-72d0de936b5d/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:25:54,698 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa3dd297-0d87-4a2f-b1c7-72d0de936b5d/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-11-02 20:25:54,906 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2022-11-02 20:25:54,906 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-02 20:25:54,908 INFO L263 TraceCheckSpWp]: Trace formula consists of 215 conjuncts, 39 conjunts are in the unsatisfiable core [2022-11-02 20:25:54,913 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:25:55,002 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-02 20:25:55,050 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 28 [2022-11-02 20:25:55,123 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-02 20:25:55,125 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 23 [2022-11-02 20:25:55,143 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-02 20:25:55,144 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 23 [2022-11-02 20:25:55,212 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-02 20:25:55,213 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 23 [2022-11-02 20:25:55,231 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-02 20:25:55,232 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 23 [2022-11-02 20:25:55,313 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-02 20:25:55,314 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 23 [2022-11-02 20:25:55,337 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-02 20:25:55,338 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 23 [2022-11-02 20:25:55,427 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-02 20:25:55,429 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 23 [2022-11-02 20:25:55,501 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-02 20:25:55,503 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-02 20:25:55,506 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-02 20:25:55,507 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 38 [2022-11-02 20:25:55,743 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-02 20:25:55,746 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-02 20:25:55,746 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 10 [2022-11-02 20:25:55,797 INFO L134 CoverageAnalysis]: Checked inductivity of 245 backedges. 34 proven. 27 refuted. 0 times theorem prover too weak. 184 trivial. 0 not checked. [2022-11-02 20:25:55,798 INFO L328 TraceCheckSpWp]: Computing backward predicates...